1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2016 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 (bfd_link_relocatable (info))
1171 dynobj = elf_hash_table (info)->dynobj;
1172 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1173 sym_hashes = elf_sym_hashes (abfd);
1174 local_got_refcounts = elf_local_got_refcounts (abfd);
1179 rel_end = relocs + sec->reloc_count;
1180 for (rel = relocs; rel < rel_end; rel++)
1182 unsigned long r_symndx;
1183 struct elf_link_hash_entry *h;
1185 r_symndx = ELF32_R_SYM (rel->r_info);
1186 if (r_symndx < symtab_hdr->sh_info)
1190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
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 || bfd_link_pic (info)))
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)
1288 if (bfd_link_pic (info))
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 (bfd_link_relocatable (info))
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,
1506 bfd_link_pic (info),
1508 || (bfd_link_pic (info)
1514 /* This is actually a static link, or it is a
1515 -Bsymbolic link and the symbol is defined
1516 locally, or the symbol was forced to be local
1517 because of a version file.. We must initialize
1518 this entry in the global offset table. Since
1519 the offset must always be a multiple of 4, we
1520 use the least significant bit to record whether
1521 we have initialized it already.
1523 When doing a dynamic link, we create a .rela.got
1524 relocation entry to initialize the value. This
1525 is done in the finish_dynamic_symbol routine. */
1530 bfd_put_32 (output_bfd, relocation,
1531 sgot->contents + off);
1536 unresolved_reloc = FALSE;
1540 BFD_ASSERT (local_got_offsets != NULL);
1541 off = local_got_offsets[r_symndx];
1542 BFD_ASSERT (off != (bfd_vma) - 1);
1544 /* The offset must always be a multiple of 4. We use
1545 the least significant bit to record whether we have
1546 already generated the necessary reloc. */
1551 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1553 if (bfd_link_pic (info))
1556 Elf_Internal_Rela outrel;
1559 s = bfd_get_linker_section (dynobj, ".rela.got");
1560 BFD_ASSERT (s != NULL);
1562 outrel.r_offset = (sgot->output_section->vma
1563 + sgot->output_offset + off);
1565 ELF32_R_INFO (0, R_BFIN_PCREL24);
1566 outrel.r_addend = relocation;
1569 s->reloc_count++ * sizeof (Elf32_External_Rela);
1570 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1573 local_got_offsets[r_symndx] |= 1;
1577 relocation = sgot->output_offset + off;
1579 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1586 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1588 relocation, rel->r_addend);
1593 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1594 because such sections are not SEC_ALLOC and thus ld.so will
1595 not process them. */
1596 if (unresolved_reloc
1597 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)
1598 && _bfd_elf_section_offset (output_bfd, info, input_section,
1599 rel->r_offset) != (bfd_vma) -1)
1602 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1604 input_section, (long) rel->r_offset, h->root.root.string);
1608 if (r != bfd_reloc_ok)
1613 name = h->root.root.string;
1616 name = bfd_elf_string_from_elf_section (input_bfd,
1617 symtab_hdr->sh_link,
1622 name = bfd_section_name (input_bfd, sec);
1625 if (r == bfd_reloc_overflow)
1626 (*info->callbacks->reloc_overflow)
1627 (info, (h ? &h->root : NULL), name, howto->name,
1628 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1632 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1633 input_bfd, input_section,
1634 (long) rel->r_offset, name, (int) r);
1644 bfin_gc_mark_hook (asection * sec,
1645 struct bfd_link_info *info,
1646 Elf_Internal_Rela * rel,
1647 struct elf_link_hash_entry *h,
1648 Elf_Internal_Sym * sym)
1651 switch (ELF32_R_TYPE (rel->r_info))
1653 case R_BFIN_GNU_VTINHERIT:
1654 case R_BFIN_GNU_VTENTRY:
1658 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1661 /* Update the got entry reference counts for the section being removed. */
1664 bfin_gc_sweep_hook (bfd * abfd,
1665 struct bfd_link_info *info,
1667 const Elf_Internal_Rela * relocs)
1669 Elf_Internal_Shdr *symtab_hdr;
1670 struct elf_link_hash_entry **sym_hashes;
1671 bfd_signed_vma *local_got_refcounts;
1672 const Elf_Internal_Rela *rel, *relend;
1677 dynobj = elf_hash_table (info)->dynobj;
1681 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1682 sym_hashes = elf_sym_hashes (abfd);
1683 local_got_refcounts = elf_local_got_refcounts (abfd);
1685 sgot = bfd_get_linker_section (dynobj, ".got");
1686 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1688 relend = relocs + sec->reloc_count;
1689 for (rel = relocs; rel < relend; rel++)
1691 unsigned long r_symndx;
1692 struct elf_link_hash_entry *h;
1694 switch (ELF32_R_TYPE (rel->r_info))
1697 r_symndx = ELF32_R_SYM (rel->r_info);
1698 if (r_symndx >= symtab_hdr->sh_info)
1700 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1701 if (h->got.refcount > 0)
1704 if (h->got.refcount == 0)
1706 /* We don't need the .got entry any more. */
1708 srelgot->size -= sizeof (Elf32_External_Rela);
1712 else if (local_got_refcounts != NULL)
1714 if (local_got_refcounts[r_symndx] > 0)
1716 --local_got_refcounts[r_symndx];
1717 if (local_got_refcounts[r_symndx] == 0)
1719 /* We don't need the .got entry any more. */
1721 if (bfd_link_pic (info))
1722 srelgot->size -= sizeof (Elf32_External_Rela);
1734 extern const bfd_target bfin_elf32_fdpic_vec;
1735 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1737 /* An extension of the elf hash table data structure,
1738 containing some additional Blackfin-specific data. */
1739 struct bfinfdpic_elf_link_hash_table
1741 struct elf_link_hash_table elf;
1743 /* A pointer to the .got section. */
1745 /* A pointer to the .rel.got section. */
1747 /* A pointer to the .rofixup section. */
1748 asection *sgotfixup;
1749 /* A pointer to the .plt section. */
1751 /* A pointer to the .rel.plt section. */
1753 /* GOT base offset. */
1755 /* Location of the first non-lazy PLT entry, i.e., the number of
1756 bytes taken by lazy PLT entries. */
1758 /* A hash table holding information about which symbols were
1759 referenced with which PIC-related relocations. */
1760 struct htab *relocs_info;
1761 /* Summary reloc information collected by
1762 _bfinfdpic_count_got_plt_entries. */
1763 struct _bfinfdpic_dynamic_got_info *g;
1766 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1768 #define bfinfdpic_hash_table(info) \
1769 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1770 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1772 #define bfinfdpic_got_section(info) \
1773 (bfinfdpic_hash_table (info)->sgot)
1774 #define bfinfdpic_gotrel_section(info) \
1775 (bfinfdpic_hash_table (info)->sgotrel)
1776 #define bfinfdpic_gotfixup_section(info) \
1777 (bfinfdpic_hash_table (info)->sgotfixup)
1778 #define bfinfdpic_plt_section(info) \
1779 (bfinfdpic_hash_table (info)->splt)
1780 #define bfinfdpic_pltrel_section(info) \
1781 (bfinfdpic_hash_table (info)->spltrel)
1782 #define bfinfdpic_relocs_info(info) \
1783 (bfinfdpic_hash_table (info)->relocs_info)
1784 #define bfinfdpic_got_initial_offset(info) \
1785 (bfinfdpic_hash_table (info)->got0)
1786 #define bfinfdpic_plt_initial_offset(info) \
1787 (bfinfdpic_hash_table (info)->plt0)
1788 #define bfinfdpic_dynamic_got_plt_info(info) \
1789 (bfinfdpic_hash_table (info)->g)
1791 /* The name of the dynamic interpreter. This is put in the .interp
1794 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1796 #define DEFAULT_STACK_SIZE 0x20000
1798 /* This structure is used to collect the number of entries present in
1799 each addressable range of the got. */
1800 struct _bfinfdpic_dynamic_got_info
1802 /* Several bits of information about the current link. */
1803 struct bfd_link_info *info;
1804 /* Total size needed for GOT entries within the 18- or 32-bit
1806 bfd_vma got17m4, gothilo;
1807 /* Total size needed for function descriptor entries within the 18-
1808 or 32-bit ranges. */
1809 bfd_vma fd17m4, fdhilo;
1810 /* Total size needed function descriptor entries referenced in PLT
1811 entries, that would be profitable to place in offsets close to
1812 the PIC register. */
1814 /* Total size needed by lazy PLT entries. */
1816 /* Number of relocations carried over from input object files. */
1817 unsigned long relocs;
1818 /* Number of fixups introduced by relocations in input object files. */
1819 unsigned long fixups;
1822 /* Create a Blackfin ELF linker hash table. */
1824 static struct bfd_link_hash_table *
1825 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1827 struct bfinfdpic_elf_link_hash_table *ret;
1828 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1830 ret = bfd_zmalloc (amt);
1834 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1835 _bfd_elf_link_hash_newfunc,
1836 sizeof (struct elf_link_hash_entry),
1843 return &ret->elf.root;
1846 /* Decide whether a reference to a symbol can be resolved locally or
1847 not. If the symbol is protected, we want the local address, but
1848 its function descriptor must be assigned by the dynamic linker. */
1849 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1850 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1851 || ! elf_hash_table (INFO)->dynamic_sections_created)
1852 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1853 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1855 /* This structure collects information on what kind of GOT, PLT or
1856 function descriptors are required by relocations that reference a
1858 struct bfinfdpic_relocs_info
1860 /* The index of the symbol, as stored in the relocation r_info, if
1861 we have a local symbol; -1 otherwise. */
1865 /* The input bfd in which the symbol is defined, if it's a local
1868 /* If symndx == -1, the hash table entry corresponding to a global
1869 symbol (even if it turns out to bind locally, in which case it
1870 should ideally be replaced with section's symndx + addend). */
1871 struct elf_link_hash_entry *h;
1873 /* The addend of the relocation that references the symbol. */
1876 /* The fields above are used to identify an entry. The fields below
1877 contain information on how an entry is used and, later on, which
1878 locations it was assigned. */
1879 /* The following 2 fields record whether the symbol+addend above was
1880 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1881 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1884 /* Whether a FUNCDESC relocation references symbol+addend. */
1886 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1889 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1890 unsigned fdgoff17m4;
1891 unsigned fdgoffhilo;
1892 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1893 GOTOFFHI relocations. The addend doesn't really matter, since we
1894 envision that this will only be used to check whether the symbol
1895 is mapped to the same segment as the got. */
1897 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1899 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1902 /* Whether we need a PLT entry for a symbol. Should be implied by
1904 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1906 /* Whether a function descriptor should be created in this link unit
1907 for symbol+addend. Should be implied by something like:
1908 (plt || fdgotoff17m4 || fdgotofflohi
1909 || ((fd || fdgot17m4 || fdgothilo)
1910 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1912 /* Whether a lazy PLT entry is needed for this symbol+addend.
1913 Should be implied by something like:
1914 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1915 && ! (info->flags & DF_BIND_NOW)) */
1917 /* Whether we've already emitted GOT relocations and PLT entries as
1918 needed for this symbol. */
1921 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1922 relocations referencing the symbol. */
1923 unsigned relocs32, relocsfd, relocsfdv;
1925 /* The number of .rofixups entries and dynamic relocations allocated
1926 for this symbol, minus any that might have already been used. */
1927 unsigned fixups, dynrelocs;
1929 /* The offsets of the GOT entries assigned to symbol+addend, to the
1930 function descriptor's address, and to a function descriptor,
1931 respectively. Should be zero if unassigned. The offsets are
1932 counted from the value that will be assigned to the PIC register,
1933 not from the beginning of the .got section. */
1934 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1935 /* The offsets of the PLT entries assigned to symbol+addend,
1936 non-lazy and lazy, respectively. If unassigned, should be
1938 bfd_vma plt_entry, lzplt_entry;
1941 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1943 bfinfdpic_relocs_info_hash (const void *entry_)
1945 const struct bfinfdpic_relocs_info *entry = entry_;
1947 return (entry->symndx == -1
1948 ? (long) entry->d.h->root.root.hash
1949 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1952 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1955 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1957 const struct bfinfdpic_relocs_info *e1 = entry1;
1958 const struct bfinfdpic_relocs_info *e2 = entry2;
1960 return e1->symndx == e2->symndx && e1->addend == e2->addend
1961 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1964 /* Find or create an entry in a hash table HT that matches the key
1965 fields of the given ENTRY. If it's not found, memory for a new
1966 entry is allocated in ABFD's obstack. */
1967 static struct bfinfdpic_relocs_info *
1968 bfinfdpic_relocs_info_find (struct htab *ht,
1970 const struct bfinfdpic_relocs_info *entry,
1971 enum insert_option insert)
1973 struct bfinfdpic_relocs_info **loc;
1978 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1986 *loc = bfd_zalloc (abfd, sizeof (**loc));
1991 (*loc)->symndx = entry->symndx;
1992 (*loc)->d = entry->d;
1993 (*loc)->addend = entry->addend;
1994 (*loc)->plt_entry = (bfd_vma)-1;
1995 (*loc)->lzplt_entry = (bfd_vma)-1;
2000 /* Obtain the address of the entry in HT associated with H's symbol +
2001 addend, creating a new entry if none existed. ABFD is only used
2002 for memory allocation purposes. */
2003 inline static struct bfinfdpic_relocs_info *
2004 bfinfdpic_relocs_info_for_global (struct htab *ht,
2006 struct elf_link_hash_entry *h,
2008 enum insert_option insert)
2010 struct bfinfdpic_relocs_info entry;
2014 entry.addend = addend;
2016 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2019 /* Obtain the address of the entry in HT associated with the SYMNDXth
2020 local symbol of the input bfd ABFD, plus the addend, creating a new
2021 entry if none existed. */
2022 inline static struct bfinfdpic_relocs_info *
2023 bfinfdpic_relocs_info_for_local (struct htab *ht,
2027 enum insert_option insert)
2029 struct bfinfdpic_relocs_info entry;
2031 entry.symndx = symndx;
2032 entry.d.abfd = abfd;
2033 entry.addend = addend;
2035 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2038 /* Merge fields set by check_relocs() of two entries that end up being
2039 mapped to the same (presumably global) symbol. */
2042 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2043 struct bfinfdpic_relocs_info const *e1)
2045 e2->got17m4 |= e1->got17m4;
2046 e2->gothilo |= e1->gothilo;
2048 e2->fdgot17m4 |= e1->fdgot17m4;
2049 e2->fdgothilo |= e1->fdgothilo;
2050 e2->fdgoff17m4 |= e1->fdgoff17m4;
2051 e2->fdgoffhilo |= e1->fdgoffhilo;
2052 e2->gotoff |= e1->gotoff;
2053 e2->call |= e1->call;
2057 /* Every block of 65535 lazy PLT entries shares a single call to the
2058 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2059 32767, counting from 0). All other lazy PLT entries branch to it
2060 in a single instruction. */
2062 #define LZPLT_RESOLVER_EXTRA 10
2063 #define LZPLT_NORMAL_SIZE 6
2064 #define LZPLT_ENTRIES 1362
2066 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2067 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2069 /* Add a dynamic relocation to the SRELOC section. */
2071 inline static bfd_vma
2072 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2073 int reloc_type, long dynindx, bfd_vma addend,
2074 struct bfinfdpic_relocs_info *entry)
2076 Elf_Internal_Rela outrel;
2077 bfd_vma reloc_offset;
2079 outrel.r_offset = offset;
2080 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2081 outrel.r_addend = addend;
2083 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2084 BFD_ASSERT (reloc_offset < sreloc->size);
2085 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2086 sreloc->contents + reloc_offset);
2087 sreloc->reloc_count++;
2089 /* If the entry's index is zero, this relocation was probably to a
2090 linkonce section that got discarded. We reserved a dynamic
2091 relocation, but it was for another entry than the one we got at
2092 the time of emitting the relocation. Unfortunately there's no
2093 simple way for us to catch this situation, since the relocation
2094 is cleared right before calling relocate_section, at which point
2095 we no longer know what the relocation used to point to. */
2098 BFD_ASSERT (entry->dynrelocs > 0);
2102 return reloc_offset;
2105 /* Add a fixup to the ROFIXUP section. */
2108 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2109 struct bfinfdpic_relocs_info *entry)
2111 bfd_vma fixup_offset;
2113 if (rofixup->flags & SEC_EXCLUDE)
2116 fixup_offset = rofixup->reloc_count * 4;
2117 if (rofixup->contents)
2119 BFD_ASSERT (fixup_offset < rofixup->size);
2120 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2122 rofixup->reloc_count++;
2124 if (entry && entry->symndx)
2126 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2128 BFD_ASSERT (entry->fixups > 0);
2132 return fixup_offset;
2135 /* Find the segment number in which OSEC, and output section, is
2139 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2141 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2143 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2146 inline static bfd_boolean
2147 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2149 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2151 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2154 /* Generate relocations for GOT entries, function descriptors, and
2155 code for PLT and lazy PLT entries. */
2157 inline static bfd_boolean
2158 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2160 struct bfd_link_info *info,
2162 Elf_Internal_Sym *sym,
2165 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1;
2172 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2174 /* If the symbol is dynamic, consider it for dynamic
2175 relocations, otherwise decay to section + offset. */
2176 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2177 dynindx = entry->d.h->dynindx;
2181 && sec->output_section
2182 && ! bfd_is_abs_section (sec->output_section)
2183 && ! bfd_is_und_section (sec->output_section))
2184 dynindx = elf_section_data (sec->output_section)->dynindx;
2190 /* Generate relocation for GOT entry pointing to the symbol. */
2191 if (entry->got_entry)
2194 bfd_vma ad = addend;
2196 /* If the symbol is dynamic but binds locally, use
2198 if (sec && (entry->symndx != -1
2199 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2201 if (entry->symndx == -1)
2202 ad += entry->d.h->root.u.def.value;
2204 ad += sym->st_value;
2205 ad += sec->output_offset;
2206 if (sec->output_section && elf_section_data (sec->output_section))
2207 idx = elf_section_data (sec->output_section)->dynindx;
2212 /* If we're linking an executable at a fixed address, we can
2213 omit the dynamic relocation as long as the symbol is local to
2215 if (bfd_link_pde (info)
2216 && (entry->symndx != -1
2217 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2220 ad += sec->output_section->vma;
2221 if (entry->symndx != -1
2222 || entry->d.h->root.type != bfd_link_hash_undefweak)
2223 _bfinfdpic_add_rofixup (output_bfd,
2224 bfinfdpic_gotfixup_section (info),
2225 bfinfdpic_got_section (info)->output_section
2227 + bfinfdpic_got_section (info)->output_offset
2228 + bfinfdpic_got_initial_offset (info)
2229 + entry->got_entry, entry);
2232 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2233 _bfd_elf_section_offset
2235 bfinfdpic_got_section (info),
2236 bfinfdpic_got_initial_offset (info)
2238 + bfinfdpic_got_section (info)
2239 ->output_section->vma
2240 + bfinfdpic_got_section (info)->output_offset,
2241 R_BFIN_BYTE4_DATA, idx, ad, entry);
2243 bfd_put_32 (output_bfd, ad,
2244 bfinfdpic_got_section (info)->contents
2245 + bfinfdpic_got_initial_offset (info)
2246 + entry->got_entry);
2249 /* Generate relocation for GOT entry pointing to a canonical
2250 function descriptor. */
2251 if (entry->fdgot_entry)
2256 if (! (entry->symndx == -1
2257 && entry->d.h->root.type == bfd_link_hash_undefweak
2258 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2260 /* If the symbol is dynamic and there may be dynamic symbol
2261 resolution because we are, or are linked with, a shared
2262 library, emit a FUNCDESC relocation such that the dynamic
2263 linker will allocate the function descriptor. If the
2264 symbol needs a non-local function descriptor but binds
2265 locally (e.g., its visibility is protected, emit a
2266 dynamic relocation decayed to section+offset. */
2267 if (entry->symndx == -1
2268 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2269 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2270 && !bfd_link_pde (info))
2272 reloc = R_BFIN_FUNCDESC;
2273 idx = elf_section_data (entry->d.h->root.u.def.section
2274 ->output_section)->dynindx;
2275 ad = entry->d.h->root.u.def.section->output_offset
2276 + entry->d.h->root.u.def.value;
2278 else if (entry->symndx == -1
2279 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2281 reloc = R_BFIN_FUNCDESC;
2289 /* Otherwise, we know we have a private function descriptor,
2290 so reference it directly. */
2291 if (elf_hash_table (info)->dynamic_sections_created)
2292 BFD_ASSERT (entry->privfd);
2293 reloc = R_BFIN_BYTE4_DATA;
2294 idx = elf_section_data (bfinfdpic_got_section (info)
2295 ->output_section)->dynindx;
2296 ad = bfinfdpic_got_section (info)->output_offset
2297 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2300 /* If there is room for dynamic symbol resolution, emit the
2301 dynamic relocation. However, if we're linking an
2302 executable at a fixed location, we won't have emitted a
2303 dynamic symbol entry for the got section, so idx will be
2304 zero, which means we can and should compute the address
2305 of the private descriptor ourselves. */
2306 if (bfd_link_pde (info)
2307 && (entry->symndx != -1
2308 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2310 ad += bfinfdpic_got_section (info)->output_section->vma;
2311 _bfinfdpic_add_rofixup (output_bfd,
2312 bfinfdpic_gotfixup_section (info),
2313 bfinfdpic_got_section (info)
2314 ->output_section->vma
2315 + bfinfdpic_got_section (info)
2317 + bfinfdpic_got_initial_offset (info)
2318 + entry->fdgot_entry, entry);
2321 _bfinfdpic_add_dyn_reloc (output_bfd,
2322 bfinfdpic_gotrel_section (info),
2323 _bfd_elf_section_offset
2325 bfinfdpic_got_section (info),
2326 bfinfdpic_got_initial_offset (info)
2327 + entry->fdgot_entry)
2328 + bfinfdpic_got_section (info)
2329 ->output_section->vma
2330 + bfinfdpic_got_section (info)
2332 reloc, idx, ad, entry);
2335 bfd_put_32 (output_bfd, ad,
2336 bfinfdpic_got_section (info)->contents
2337 + bfinfdpic_got_initial_offset (info)
2338 + entry->fdgot_entry);
2341 /* Generate relocation to fill in a private function descriptor in
2343 if (entry->fd_entry)
2346 bfd_vma ad = addend;
2348 long lowword, highword;
2350 /* If the symbol is dynamic but binds locally, use
2352 if (sec && (entry->symndx != -1
2353 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2355 if (entry->symndx == -1)
2356 ad += entry->d.h->root.u.def.value;
2358 ad += sym->st_value;
2359 ad += sec->output_offset;
2360 if (sec->output_section && elf_section_data (sec->output_section))
2361 idx = elf_section_data (sec->output_section)->dynindx;
2366 /* If we're linking an executable at a fixed address, we can
2367 omit the dynamic relocation as long as the symbol is local to
2369 if (bfd_link_pde (info)
2370 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2373 ad += sec->output_section->vma;
2375 if (entry->symndx != -1
2376 || entry->d.h->root.type != bfd_link_hash_undefweak)
2378 _bfinfdpic_add_rofixup (output_bfd,
2379 bfinfdpic_gotfixup_section (info),
2380 bfinfdpic_got_section (info)
2381 ->output_section->vma
2382 + bfinfdpic_got_section (info)
2384 + bfinfdpic_got_initial_offset (info)
2385 + entry->fd_entry, entry);
2386 _bfinfdpic_add_rofixup (output_bfd,
2387 bfinfdpic_gotfixup_section (info),
2388 bfinfdpic_got_section (info)
2389 ->output_section->vma
2390 + bfinfdpic_got_section (info)
2392 + bfinfdpic_got_initial_offset (info)
2393 + entry->fd_entry + 4, entry);
2399 = _bfinfdpic_add_dyn_reloc (output_bfd,
2401 ? bfinfdpic_pltrel_section (info)
2402 : bfinfdpic_gotrel_section (info),
2403 _bfd_elf_section_offset
2405 bfinfdpic_got_section (info),
2406 bfinfdpic_got_initial_offset (info)
2408 + bfinfdpic_got_section (info)
2409 ->output_section->vma
2410 + bfinfdpic_got_section (info)
2412 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2415 /* If we've omitted the dynamic relocation, just emit the fixed
2416 addresses of the symbol and of the local GOT base offset. */
2417 if (bfd_link_pde (info)
2419 && sec->output_section)
2422 highword = bfinfdpic_got_section (info)->output_section->vma
2423 + bfinfdpic_got_section (info)->output_offset
2424 + bfinfdpic_got_initial_offset (info);
2426 else if (entry->lazyplt)
2431 fd_lazy_rel_offset = ofst;
2433 /* A function descriptor used for lazy or local resolving is
2434 initialized such that its high word contains the output
2435 section index in which the PLT entries are located, and
2436 the low word contains the address of the lazy PLT entry
2437 entry point, that must be within the memory region
2438 assigned to that section. */
2439 lowword = entry->lzplt_entry + 4
2440 + bfinfdpic_plt_section (info)->output_offset
2441 + bfinfdpic_plt_section (info)->output_section->vma;
2442 highword = _bfinfdpic_osec_to_segment
2443 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2447 /* A function descriptor for a local function gets the index
2448 of the section. For a non-local function, it's
2452 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2453 && entry->d.h->dynindx == idx))
2456 highword = _bfinfdpic_osec_to_segment
2457 (output_bfd, sec->output_section);
2460 bfd_put_32 (output_bfd, lowword,
2461 bfinfdpic_got_section (info)->contents
2462 + bfinfdpic_got_initial_offset (info)
2464 bfd_put_32 (output_bfd, highword,
2465 bfinfdpic_got_section (info)->contents
2466 + bfinfdpic_got_initial_offset (info)
2467 + entry->fd_entry + 4);
2470 /* Generate code for the PLT entry. */
2471 if (entry->plt_entry != (bfd_vma) -1)
2473 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2476 BFD_ASSERT (entry->fd_entry);
2478 /* Figure out what kind of PLT entry we need, depending on the
2479 location of the function descriptor within the GOT. */
2480 if (entry->fd_entry >= -(1 << (18 - 1))
2481 && entry->fd_entry + 4 < (1 << (18 - 1)))
2483 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2484 bfd_put_32 (output_bfd,
2485 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2487 bfd_put_32 (output_bfd,
2488 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2494 /* P1.L = fd_entry; P1.H = fd_entry;
2498 bfd_put_32 (output_bfd,
2499 0xe109 | (entry->fd_entry << 16),
2501 bfd_put_32 (output_bfd,
2502 0xe149 | (entry->fd_entry & 0xFFFF0000),
2504 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2505 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2506 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2510 bfd_put_16 (output_bfd, 0x0051, plt_code);
2513 /* Generate code for the lazy PLT entry. */
2514 if (entry->lzplt_entry != (bfd_vma) -1)
2516 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2517 + entry->lzplt_entry;
2518 bfd_vma resolverStub_addr;
2520 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2523 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2524 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2525 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2526 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2528 if (entry->lzplt_entry == resolverStub_addr)
2530 /* This is a lazy PLT entry that includes a resolver call.
2534 bfd_put_32 (output_bfd,
2537 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2541 /* JUMP.S resolverStub */
2542 bfd_put_16 (output_bfd,
2544 | (((resolverStub_addr - entry->lzplt_entry)
2545 / 2) & (((bfd_vma)1 << 12) - 1)),
2553 /* Relocate an Blackfin ELF section.
2555 The RELOCATE_SECTION function is called by the new ELF backend linker
2556 to handle the relocations for a section.
2558 The relocs are always passed as Rela structures; if the section
2559 actually uses Rel structures, the r_addend field will always be
2562 This function is responsible for adjusting the section contents as
2563 necessary, and (if using Rela relocs and generating a relocatable
2564 output file) adjusting the reloc addend as necessary.
2566 This function does not have to worry about setting the reloc
2567 address or the reloc symbol index.
2569 LOCAL_SYMS is a pointer to the swapped in local symbols.
2571 LOCAL_SECTIONS is an array giving the section in the input file
2572 corresponding to the st_shndx field of each local symbol.
2574 The global hash table entry for the global symbols can be found
2575 via elf_sym_hashes (input_bfd).
2577 When generating relocatable output, this function must handle
2578 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2579 going to be the section symbol corresponding to the output
2580 section, which means that the addend must be adjusted
2584 bfinfdpic_relocate_section (bfd * output_bfd,
2585 struct bfd_link_info *info,
2587 asection * input_section,
2588 bfd_byte * contents,
2589 Elf_Internal_Rela * relocs,
2590 Elf_Internal_Sym * local_syms,
2591 asection ** local_sections)
2593 Elf_Internal_Shdr *symtab_hdr;
2594 struct elf_link_hash_entry **sym_hashes;
2595 Elf_Internal_Rela *rel;
2596 Elf_Internal_Rela *relend;
2597 unsigned isec_segment, got_segment, plt_segment,
2599 int silence_segment_error = !bfd_link_pic (info);
2601 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2602 sym_hashes = elf_sym_hashes (input_bfd);
2603 relend = relocs + input_section->reloc_count;
2605 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2606 input_section->output_section);
2607 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2608 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2609 bfinfdpic_got_section (info)
2613 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2614 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2615 bfinfdpic_plt_section (info)
2620 for (rel = relocs; rel < relend; rel ++)
2622 reloc_howto_type *howto;
2623 unsigned long r_symndx;
2624 Elf_Internal_Sym *sym;
2626 struct elf_link_hash_entry *h;
2628 bfd_reloc_status_type r;
2629 const char * name = NULL;
2632 struct bfinfdpic_relocs_info *picrel;
2633 bfd_vma orig_addend = rel->r_addend;
2635 r_type = ELF32_R_TYPE (rel->r_info);
2637 if (r_type == R_BFIN_GNU_VTINHERIT
2638 || r_type == R_BFIN_GNU_VTENTRY)
2641 r_symndx = ELF32_R_SYM (rel->r_info);
2642 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2645 bfd_set_error (bfd_error_bad_value);
2653 if (r_symndx < symtab_hdr->sh_info)
2655 sym = local_syms + r_symndx;
2656 osec = sec = local_sections [r_symndx];
2657 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2659 name = bfd_elf_string_from_elf_section
2660 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2661 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2665 bfd_boolean warned, ignored;
2666 bfd_boolean unresolved_reloc;
2668 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2669 r_symndx, symtab_hdr, sym_hashes,
2671 unresolved_reloc, warned, ignored);
2675 if (sec != NULL && discarded_section (sec))
2676 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2677 rel, 1, relend, howto, 0, contents);
2679 if (bfd_link_relocatable (info))
2683 && (h->root.type == bfd_link_hash_defined
2684 || h->root.type == bfd_link_hash_defweak)
2685 && !BFINFDPIC_SYM_LOCAL (info, h))
2693 case R_BFIN_PCREL24:
2694 case R_BFIN_PCREL24_JUMP_L:
2695 case R_BFIN_BYTE4_DATA:
2696 if (! IS_FDPIC (output_bfd))
2700 case R_BFIN_GOT17M4:
2703 case R_BFIN_FUNCDESC_GOT17M4:
2704 case R_BFIN_FUNCDESC_GOTHI:
2705 case R_BFIN_FUNCDESC_GOTLO:
2706 case R_BFIN_GOTOFF17M4:
2707 case R_BFIN_GOTOFFHI:
2708 case R_BFIN_GOTOFFLO:
2709 case R_BFIN_FUNCDESC_GOTOFF17M4:
2710 case R_BFIN_FUNCDESC_GOTOFFHI:
2711 case R_BFIN_FUNCDESC_GOTOFFLO:
2712 case R_BFIN_FUNCDESC:
2713 case R_BFIN_FUNCDESC_VALUE:
2715 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2716 (info), input_bfd, h,
2717 orig_addend, INSERT);
2719 /* In order to find the entry we created before, we must
2720 use the original addend, not the one that may have been
2721 modified by _bfd_elf_rela_local_sym(). */
2722 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2723 (info), input_bfd, r_symndx,
2724 orig_addend, INSERT);
2728 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2733 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2734 input_bfd, input_section, rel->r_offset, name);
2744 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2745 && _bfd_elf_section_offset (output_bfd, info, input_section,
2746 rel->r_offset) != (bfd_vma) -1)
2748 info->callbacks->warning
2749 (info, _("relocation references symbol not defined in the module"),
2750 name, input_bfd, input_section, rel->r_offset);
2758 case R_BFIN_PCREL24:
2759 case R_BFIN_PCREL24_JUMP_L:
2760 check_segment[0] = isec_segment;
2761 if (! IS_FDPIC (output_bfd))
2762 check_segment[1] = isec_segment;
2763 else if (picrel->plt)
2765 relocation = bfinfdpic_plt_section (info)->output_section->vma
2766 + bfinfdpic_plt_section (info)->output_offset
2767 + picrel->plt_entry;
2768 check_segment[1] = plt_segment;
2770 /* We don't want to warn on calls to undefined weak symbols,
2771 as calls to them must be protected by non-NULL tests
2772 anyway, and unprotected calls would invoke undefined
2774 else if (picrel->symndx == -1
2775 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2776 check_segment[1] = check_segment[0];
2778 check_segment[1] = sec
2779 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2783 case R_BFIN_GOT17M4:
2786 relocation = picrel->got_entry;
2787 check_segment[0] = check_segment[1] = got_segment;
2790 case R_BFIN_FUNCDESC_GOT17M4:
2791 case R_BFIN_FUNCDESC_GOTHI:
2792 case R_BFIN_FUNCDESC_GOTLO:
2793 relocation = picrel->fdgot_entry;
2794 check_segment[0] = check_segment[1] = got_segment;
2797 case R_BFIN_GOTOFFHI:
2798 case R_BFIN_GOTOFF17M4:
2799 case R_BFIN_GOTOFFLO:
2800 relocation -= bfinfdpic_got_section (info)->output_section->vma
2801 + bfinfdpic_got_section (info)->output_offset
2802 + bfinfdpic_got_initial_offset (info);
2803 check_segment[0] = got_segment;
2804 check_segment[1] = sec
2805 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2809 case R_BFIN_FUNCDESC_GOTOFF17M4:
2810 case R_BFIN_FUNCDESC_GOTOFFHI:
2811 case R_BFIN_FUNCDESC_GOTOFFLO:
2812 relocation = picrel->fd_entry;
2813 check_segment[0] = check_segment[1] = got_segment;
2816 case R_BFIN_FUNCDESC:
2819 bfd_vma addend = rel->r_addend;
2821 if (! (h && h->root.type == bfd_link_hash_undefweak
2822 && BFINFDPIC_SYM_LOCAL (info, h)))
2824 /* If the symbol is dynamic and there may be dynamic
2825 symbol resolution because we are or are linked with a
2826 shared library, emit a FUNCDESC relocation such that
2827 the dynamic linker will allocate the function
2828 descriptor. If the symbol needs a non-local function
2829 descriptor but binds locally (e.g., its visibility is
2830 protected, emit a dynamic relocation decayed to
2832 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2833 && BFINFDPIC_SYM_LOCAL (info, h)
2834 && !bfd_link_pde (info))
2836 dynindx = elf_section_data (h->root.u.def.section
2837 ->output_section)->dynindx;
2838 addend += h->root.u.def.section->output_offset
2839 + h->root.u.def.value;
2841 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2845 info->callbacks->warning
2846 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2847 name, input_bfd, input_section, rel->r_offset);
2850 dynindx = h->dynindx;
2854 /* Otherwise, we know we have a private function
2855 descriptor, so reference it directly. */
2856 BFD_ASSERT (picrel->privfd);
2857 r_type = R_BFIN_BYTE4_DATA;
2858 dynindx = elf_section_data (bfinfdpic_got_section (info)
2859 ->output_section)->dynindx;
2860 addend = bfinfdpic_got_section (info)->output_offset
2861 + bfinfdpic_got_initial_offset (info)
2865 /* If there is room for dynamic symbol resolution, emit
2866 the dynamic relocation. However, if we're linking an
2867 executable at a fixed location, we won't have emitted a
2868 dynamic symbol entry for the got section, so idx will
2869 be zero, which means we can and should compute the
2870 address of the private descriptor ourselves. */
2871 if (bfd_link_pde (info)
2872 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2876 addend += bfinfdpic_got_section (info)->output_section->vma;
2877 if ((bfd_get_section_flags (output_bfd,
2878 input_section->output_section)
2879 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2881 if (_bfinfdpic_osec_readonly_p (output_bfd,
2885 info->callbacks->warning
2887 _("cannot emit fixups in read-only section"),
2888 name, input_bfd, input_section, rel->r_offset);
2892 offset = _bfd_elf_section_offset
2894 input_section, rel->r_offset);
2896 if (offset != (bfd_vma)-1)
2897 _bfinfdpic_add_rofixup (output_bfd,
2898 bfinfdpic_gotfixup_section
2900 offset + input_section
2901 ->output_section->vma
2902 + input_section->output_offset,
2906 else if ((bfd_get_section_flags (output_bfd,
2907 input_section->output_section)
2908 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2912 if (_bfinfdpic_osec_readonly_p (output_bfd,
2916 info->callbacks->warning
2918 _("cannot emit dynamic relocations in read-only section"),
2919 name, input_bfd, input_section, rel->r_offset);
2922 offset = _bfd_elf_section_offset (output_bfd, info,
2923 input_section, rel->r_offset);
2925 if (offset != (bfd_vma)-1)
2926 _bfinfdpic_add_dyn_reloc (output_bfd,
2927 bfinfdpic_gotrel_section (info),
2928 offset + input_section
2929 ->output_section->vma
2930 + input_section->output_offset,
2932 dynindx, addend, picrel);
2935 addend += bfinfdpic_got_section (info)->output_section->vma;
2938 /* We want the addend in-place because dynamic
2939 relocations are REL. Setting relocation to it should
2940 arrange for it to be installed. */
2941 relocation = addend - rel->r_addend;
2943 check_segment[0] = check_segment[1] = got_segment;
2946 case R_BFIN_BYTE4_DATA:
2947 if (! IS_FDPIC (output_bfd))
2949 check_segment[0] = check_segment[1] = -1;
2953 case R_BFIN_FUNCDESC_VALUE:
2956 bfd_vma addend = rel->r_addend;
2958 offset = _bfd_elf_section_offset (output_bfd, info,
2959 input_section, rel->r_offset);
2961 /* If the symbol is dynamic but binds locally, use
2963 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2965 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2967 info->callbacks->warning
2968 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2969 name, input_bfd, input_section, rel->r_offset);
2972 dynindx = h->dynindx;
2977 addend += h->root.u.def.value;
2979 addend += sym->st_value;
2981 addend += osec->output_offset;
2982 if (osec && osec->output_section
2983 && ! bfd_is_abs_section (osec->output_section)
2984 && ! bfd_is_und_section (osec->output_section))
2985 dynindx = elf_section_data (osec->output_section)->dynindx;
2990 /* If we're linking an executable at a fixed address, we
2991 can omit the dynamic relocation as long as the symbol
2992 is defined in the current link unit (which is implied
2993 by its output section not being NULL). */
2994 if (bfd_link_pde (info)
2995 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2998 addend += osec->output_section->vma;
2999 if (IS_FDPIC (input_bfd)
3000 && (bfd_get_section_flags (output_bfd,
3001 input_section->output_section)
3002 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3004 if (_bfinfdpic_osec_readonly_p (output_bfd,
3008 info->callbacks->warning
3010 _("cannot emit fixups in read-only section"),
3011 name, input_bfd, input_section, rel->r_offset);
3014 if (!h || h->root.type != bfd_link_hash_undefweak)
3016 if (offset != (bfd_vma)-1)
3018 _bfinfdpic_add_rofixup (output_bfd,
3019 bfinfdpic_gotfixup_section
3021 offset + input_section
3022 ->output_section->vma
3023 + input_section->output_offset,
3026 if (r_type == R_BFIN_FUNCDESC_VALUE)
3027 _bfinfdpic_add_rofixup
3029 bfinfdpic_gotfixup_section (info),
3030 offset + input_section->output_section->vma
3031 + input_section->output_offset + 4, picrel);
3038 if ((bfd_get_section_flags (output_bfd,
3039 input_section->output_section)
3040 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3042 if (_bfinfdpic_osec_readonly_p (output_bfd,
3046 info->callbacks->warning
3048 _("cannot emit dynamic relocations in read-only section"),
3049 name, input_bfd, input_section, rel->r_offset);
3053 if (offset != (bfd_vma)-1)
3054 _bfinfdpic_add_dyn_reloc (output_bfd,
3055 bfinfdpic_gotrel_section (info),
3057 + input_section->output_section->vma
3058 + input_section->output_offset,
3059 r_type, dynindx, addend, picrel);
3062 addend += osec->output_section->vma;
3063 /* We want the addend in-place because dynamic
3064 relocations are REL. Setting relocation to it
3065 should arrange for it to be installed. */
3066 relocation = addend - rel->r_addend;
3069 if (r_type == R_BFIN_FUNCDESC_VALUE)
3071 /* If we've omitted the dynamic relocation, just emit
3072 the fixed addresses of the symbol and of the local
3074 if (bfd_link_pde (info)
3075 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3076 bfd_put_32 (output_bfd,
3077 bfinfdpic_got_section (info)->output_section->vma
3078 + bfinfdpic_got_section (info)->output_offset
3079 + bfinfdpic_got_initial_offset (info),
3080 contents + rel->r_offset + 4);
3082 /* A function descriptor used for lazy or local
3083 resolving is initialized such that its high word
3084 contains the output section index in which the
3085 PLT entries are located, and the low word
3086 contains the offset of the lazy PLT entry entry
3087 point into that section. */
3088 bfd_put_32 (output_bfd,
3089 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3091 : _bfinfdpic_osec_to_segment (output_bfd,
3094 contents + rel->r_offset + 4);
3097 check_segment[0] = check_segment[1] = got_segment;
3101 check_segment[0] = isec_segment;
3102 check_segment[1] = sec
3103 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3108 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3110 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3111 in the ld testsuite. */
3112 /* This helps catch problems in GCC while we can't do more
3113 than static linking. The idea is to test whether the
3114 input file basename is crt0.o only once. */
3115 if (silence_segment_error == 1)
3116 silence_segment_error =
3117 (strlen (input_bfd->filename) == 6
3118 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3119 || (strlen (input_bfd->filename) > 6
3120 && filename_cmp (input_bfd->filename
3121 + strlen (input_bfd->filename) - 7,
3125 if (!silence_segment_error
3126 /* We don't want duplicate errors for undefined
3128 && !(picrel && picrel->symndx == -1
3129 && picrel->d.h->root.type == bfd_link_hash_undefined))
3130 info->callbacks->warning
3133 ? _("relocations between different segments are not supported")
3134 : _("warning: relocation references a different segment"),
3135 name, input_bfd, input_section, rel->r_offset);
3136 if (!silence_segment_error && bfd_link_pic (info))
3138 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3143 case R_BFIN_GOTOFFHI:
3144 /* We need the addend to be applied before we shift the
3146 relocation += rel->r_addend;
3149 case R_BFIN_FUNCDESC_GOTHI:
3150 case R_BFIN_FUNCDESC_GOTOFFHI:
3155 case R_BFIN_FUNCDESC_GOTLO:
3156 case R_BFIN_GOTOFFLO:
3157 case R_BFIN_FUNCDESC_GOTOFFLO:
3158 relocation &= 0xffff;
3167 case R_BFIN_PCREL24:
3168 case R_BFIN_PCREL24_JUMP_L:
3169 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3173 /* When referencing a GOT entry, a function descriptor or a
3174 PLT, we don't want the addend to apply to the reference,
3175 but rather to the referenced symbol. The actual entry
3176 will have already been created taking the addend into
3177 account, so cancel it out here. */
3178 case R_BFIN_GOT17M4:
3181 case R_BFIN_FUNCDESC_GOT17M4:
3182 case R_BFIN_FUNCDESC_GOTHI:
3183 case R_BFIN_FUNCDESC_GOTLO:
3184 case R_BFIN_FUNCDESC_GOTOFF17M4:
3185 case R_BFIN_FUNCDESC_GOTOFFHI:
3186 case R_BFIN_FUNCDESC_GOTOFFLO:
3187 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3188 here, since we do want to apply the addend to the others.
3189 Note that we've applied the addend to GOTOFFHI before we
3190 shifted it right. */
3191 case R_BFIN_GOTOFFHI:
3192 relocation -= rel->r_addend;
3199 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3200 contents, rel->r_offset,
3201 relocation, rel->r_addend);
3203 if (r != bfd_reloc_ok)
3205 const char * msg = (const char *) NULL;
3209 case bfd_reloc_overflow:
3210 (*info->callbacks->reloc_overflow)
3211 (info, (h ? &h->root : NULL), name, howto->name,
3212 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3215 case bfd_reloc_undefined:
3216 (*info->callbacks->undefined_symbol)
3217 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3220 case bfd_reloc_outofrange:
3221 msg = _("internal error: out of range error");
3224 case bfd_reloc_notsupported:
3225 msg = _("internal error: unsupported relocation error");
3228 case bfd_reloc_dangerous:
3229 msg = _("internal error: dangerous relocation");
3233 msg = _("internal error: unknown error");
3238 (*info->callbacks->warning) (info, msg, name, input_bfd,
3239 input_section, rel->r_offset);
3246 /* Update the relocation information for the relocations of the section
3250 bfinfdpic_gc_sweep_hook (bfd *abfd,
3251 struct bfd_link_info *info,
3253 const Elf_Internal_Rela *relocs)
3255 Elf_Internal_Shdr *symtab_hdr;
3256 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3257 const Elf_Internal_Rela *rel;
3258 const Elf_Internal_Rela *rel_end;
3259 struct bfinfdpic_relocs_info *picrel;
3261 BFD_ASSERT (IS_FDPIC (abfd));
3263 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3264 sym_hashes = elf_sym_hashes (abfd);
3265 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3266 if (!elf_bad_symtab (abfd))
3267 sym_hashes_end -= symtab_hdr->sh_info;
3269 rel_end = relocs + sec->reloc_count;
3270 for (rel = relocs; rel < rel_end; rel++)
3272 struct elf_link_hash_entry *h;
3273 unsigned long r_symndx;
3275 r_symndx = ELF32_R_SYM (rel->r_info);
3276 if (r_symndx < symtab_hdr->sh_info)
3279 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3282 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3284 rel->r_addend, NO_INSERT);
3286 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3287 (info), abfd, r_symndx,
3288 rel->r_addend, NO_INSERT);
3293 switch (ELF32_R_TYPE (rel->r_info))
3295 case R_BFIN_PCREL24:
3296 case R_BFIN_PCREL24_JUMP_L:
3300 case R_BFIN_FUNCDESC_VALUE:
3301 picrel->relocsfdv--;
3302 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3306 case R_BFIN_BYTE4_DATA:
3308 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3312 case R_BFIN_GOT17M4:
3321 case R_BFIN_FUNCDESC_GOT17M4:
3322 picrel->fdgot17m4--;
3325 case R_BFIN_FUNCDESC_GOTHI:
3326 case R_BFIN_FUNCDESC_GOTLO:
3327 picrel->fdgothilo--;
3330 case R_BFIN_GOTOFF17M4:
3331 case R_BFIN_GOTOFFHI:
3332 case R_BFIN_GOTOFFLO:
3336 case R_BFIN_FUNCDESC_GOTOFF17M4:
3337 picrel->fdgoff17m4--;
3340 case R_BFIN_FUNCDESC_GOTOFFHI:
3341 case R_BFIN_FUNCDESC_GOTOFFLO:
3342 picrel->fdgoffhilo--;
3345 case R_BFIN_FUNCDESC:
3358 /* We need dynamic symbols for every section, since segments can
3359 relocate independently. */
3361 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3362 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3365 switch (elf_section_data (p)->this_hdr.sh_type)
3369 /* If sh_type is yet undecided, assume it could be
3370 SHT_PROGBITS/SHT_NOBITS. */
3374 /* There shouldn't be section relative relocations
3375 against any other section. */
3381 /* Create a .got section, as well as its additional info field. This
3382 is almost entirely copied from
3383 elflink.c:_bfd_elf_create_got_section(). */
3386 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3388 flagword flags, pltflags;
3390 struct elf_link_hash_entry *h;
3391 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3394 /* This function may be called more than once. */
3395 s = bfd_get_linker_section (abfd, ".got");
3399 /* Machine specific: although pointers are 32-bits wide, we want the
3400 GOT to be aligned to a 64-bit boundary, such that function
3401 descriptors in it can be accessed with 64-bit loads and
3405 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3406 | SEC_LINKER_CREATED);
3409 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3411 || !bfd_set_section_alignment (abfd, s, ptralign))
3414 if (bed->want_got_plt)
3416 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
3418 || !bfd_set_section_alignment (abfd, s, ptralign))
3422 if (bed->want_got_sym)
3424 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3425 (or .got.plt) section. We don't do this in the linker script
3426 because we don't want to define the symbol if we are not creating
3427 a global offset table. */
3428 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3429 elf_hash_table (info)->hgot = h;
3433 /* Machine-specific: we want the symbol for executables as
3435 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3439 /* The first bit of the global offset table is the header. */
3440 s->size += bed->got_header_size;
3442 /* This is the machine-specific part. Create and initialize section
3443 data for the got. */
3444 if (IS_FDPIC (abfd))
3446 bfinfdpic_got_section (info) = s;
3447 bfinfdpic_relocs_info (info) = htab_try_create (1,
3448 bfinfdpic_relocs_info_hash,
3449 bfinfdpic_relocs_info_eq,
3451 if (! bfinfdpic_relocs_info (info))
3454 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3455 (flags | SEC_READONLY));
3457 || ! bfd_set_section_alignment (abfd, s, 2))
3460 bfinfdpic_gotrel_section (info) = s;
3462 /* Machine-specific. */
3463 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3464 (flags | SEC_READONLY));
3466 || ! bfd_set_section_alignment (abfd, s, 2))
3469 bfinfdpic_gotfixup_section (info) = s;
3472 pltflags |= SEC_CODE;
3473 if (bed->plt_not_loaded)
3474 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3475 if (bed->plt_readonly)
3476 pltflags |= SEC_READONLY;
3478 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3480 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3482 /* Blackfin-specific: remember it. */
3483 bfinfdpic_plt_section (info) = s;
3485 if (bed->want_plt_sym)
3487 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3489 struct bfd_link_hash_entry *bh = NULL;
3491 if (! (_bfd_generic_link_add_one_symbol
3492 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3493 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3495 h = (struct elf_link_hash_entry *) bh;
3497 h->type = STT_OBJECT;
3499 if (! bfd_link_executable (info)
3500 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3504 /* Blackfin-specific: we want rel relocations for the plt. */
3505 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3506 flags | SEC_READONLY);
3508 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3510 /* Blackfin-specific: remember it. */
3511 bfinfdpic_pltrel_section (info) = s;
3516 /* Make sure the got and plt sections exist, and that our pointers in
3517 the link hash table point to them. */
3520 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3522 /* This is mostly copied from
3523 elflink.c:_bfd_elf_create_dynamic_sections(). */
3526 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3528 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3529 | SEC_LINKER_CREATED);
3531 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3532 .rel[a].bss sections. */
3534 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3535 if (! _bfin_create_got_section (abfd, info))
3538 /* Blackfin-specific: make sure we created everything we wanted. */
3539 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3540 /* && bfinfdpic_gotfixup_section (info) */
3541 && bfinfdpic_plt_section (info)
3542 && bfinfdpic_pltrel_section (info));
3544 if (bed->want_dynbss)
3546 /* The .dynbss section is a place to put symbols which are defined
3547 by dynamic objects, are referenced by regular objects, and are
3548 not functions. We must allocate space for them in the process
3549 image and use a R_*_COPY reloc to tell the dynamic linker to
3550 initialize them at run time. The linker script puts the .dynbss
3551 section into the .bss section of the final image. */
3552 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3553 SEC_ALLOC | SEC_LINKER_CREATED);
3557 /* The .rel[a].bss section holds copy relocs. This section is not
3558 normally needed. We need to create it here, though, so that the
3559 linker will map it to an output section. We can't just create it
3560 only if we need it, because we will not know whether we need it
3561 until we have seen all the input files, and the first time the
3562 main linker code calls BFD after examining all the input files
3563 (size_dynamic_sections) the input sections have already been
3564 mapped to the output sections. If the section turns out not to
3565 be needed, we can discard it later. We will never need this
3566 section when generating a shared object, since they do not use
3568 if (! bfd_link_pic (info))
3570 s = bfd_make_section_anyway_with_flags (abfd,
3572 flags | SEC_READONLY);
3574 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3582 /* Compute the total GOT size required by each symbol in each range.
3583 Symbols may require up to 4 words in the GOT: an entry pointing to
3584 the symbol, an entry pointing to its function descriptor, and a
3585 private function descriptors taking two words. */
3588 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3589 struct _bfinfdpic_dynamic_got_info *dinfo)
3591 /* Allocate space for a GOT entry pointing to the symbol. */
3593 dinfo->got17m4 += 4;
3594 else if (entry->gothilo)
3595 dinfo->gothilo += 4;
3600 /* Allocate space for a GOT entry pointing to the function
3602 if (entry->fdgot17m4)
3603 dinfo->got17m4 += 4;
3604 else if (entry->fdgothilo)
3605 dinfo->gothilo += 4;
3610 /* Decide whether we need a PLT entry, a function descriptor in the
3611 GOT, and a lazy PLT entry for this symbol. */
3612 entry->plt = entry->call
3613 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3614 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3615 entry->privfd = entry->plt
3616 || entry->fdgoff17m4 || entry->fdgoffhilo
3617 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3618 && (entry->symndx != -1
3619 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3620 entry->lazyplt = entry->privfd
3621 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3622 && ! (dinfo->info->flags & DF_BIND_NOW)
3623 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3625 /* Allocate space for a function descriptor. */
3626 if (entry->fdgoff17m4)
3628 else if (entry->privfd && entry->plt)
3630 else if (entry->privfd)
3637 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3640 /* Compute the number of dynamic relocations and fixups that a symbol
3641 requires, and add (or subtract) from the grand and per-symbol
3645 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3646 struct _bfinfdpic_dynamic_got_info *dinfo,
3647 bfd_boolean subtract)
3649 bfd_vma relocs = 0, fixups = 0;
3651 if (!bfd_link_pde (dinfo->info))
3652 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3655 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3657 if (entry->symndx != -1
3658 || entry->d.h->root.type != bfd_link_hash_undefweak)
3659 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3662 relocs += entry->relocs32 + entry->relocsfdv;
3664 if (entry->symndx != -1
3665 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3667 if (entry->symndx != -1
3668 || entry->d.h->root.type != bfd_link_hash_undefweak)
3669 fixups += entry->relocsfd;
3672 relocs += entry->relocsfd;
3681 entry->dynrelocs += relocs;
3682 entry->fixups += fixups;
3683 dinfo->relocs += relocs;
3684 dinfo->fixups += fixups;
3687 /* Compute the total GOT and PLT size required by each symbol in each range. *
3688 Symbols may require up to 4 words in the GOT: an entry pointing to
3689 the symbol, an entry pointing to its function descriptor, and a
3690 private function descriptors taking two words. */
3693 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3695 struct bfinfdpic_relocs_info *entry = *entryp;
3696 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3698 _bfinfdpic_count_nontls_entries (entry, dinfo);
3700 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3705 /* This structure is used to assign offsets to got entries, function
3706 descriptors, plt entries and lazy plt entries. */
3708 struct _bfinfdpic_dynamic_got_plt_info
3710 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3711 struct _bfinfdpic_dynamic_got_info g;
3713 /* For each addressable range, we record a MAX (positive) and MIN
3714 (negative) value. CUR is used to assign got entries, and it's
3715 incremented from an initial positive value to MAX, then from MIN
3716 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3717 assign function descriptors, and it's decreased from an initial
3718 non-positive value to MIN, then from MAX down to CUR (unless CUR
3719 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3720 to even words. ODD, if non-zero, indicates an odd word to be
3721 used for the next got entry, otherwise CUR is used and
3722 incremented by a pair of words, wrapping around when it reaches
3723 MAX. FDCUR is decremented (and wrapped) before the next function
3724 descriptor is chosen. FDPLT indicates the number of remaining
3725 slots that can be used for function descriptors used only by PLT
3727 struct _bfinfdpic_dynamic_got_alloc_data
3729 bfd_signed_vma max, cur, odd, fdcur, min;
3734 /* Determine the positive and negative ranges to be used by each
3735 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3736 double-word boundary, are the minimum (negative) and maximum
3737 (positive) GOT offsets already used by previous ranges, except for
3738 an ODD entry that may have been left behind. GOT and FD indicate
3739 the size of GOT entries and function descriptors that must be
3740 placed within the range from -WRAP to WRAP. If there's room left,
3741 up to FDPLT bytes should be reserved for additional function
3744 inline static bfd_signed_vma
3745 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3746 bfd_signed_vma fdcur,
3754 bfd_signed_vma wrapmin = -wrap;
3756 /* Start at the given initial points. */
3760 /* If we had an incoming odd word and we have any got entries that
3761 are going to use it, consume it, otherwise leave gad->odd at
3762 zero. We might force gad->odd to zero and return the incoming
3763 odd such that it is used by the next range, but then GOT entries
3764 might appear to be out of order and we wouldn't be able to
3765 shorten the GOT by one word if it turns out to end with an
3766 unpaired GOT entry. */
3776 /* If we're left with an unpaired GOT entry, compute its location
3777 such that we can return it. Otherwise, if got doesn't require an
3778 odd number of words here, either odd was already zero in the
3779 block above, or it was set to zero because got was non-zero, or
3780 got was already zero. In the latter case, we want the value of
3781 odd to carry over to the return statement, so we don't want to
3782 reset odd unless the condition below is true. */
3789 /* Compute the tentative boundaries of this range. */
3790 gad->max = cur + got;
3791 gad->min = fdcur - fd;
3794 /* If function descriptors took too much space, wrap some of them
3796 if (gad->min < wrapmin)
3798 gad->max += wrapmin - gad->min;
3801 /* If there is space left and we have function descriptors
3802 referenced in PLT entries that could take advantage of shorter
3803 offsets, place them here. */
3804 else if (fdplt && gad->min > wrapmin)
3807 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3808 fds = gad->min - wrapmin;
3817 /* If GOT entries took too much space, wrap some of them around.
3818 This may well cause gad->min to become lower than wrapmin. This
3819 will cause a relocation overflow later on, so we don't have to
3821 if ((bfd_vma) gad->max > wrap)
3823 gad->min -= gad->max - wrap;
3826 /* If there is more space left, try to place some more function
3827 descriptors for PLT entries. */
3828 else if (fdplt && (bfd_vma) gad->max < wrap)
3831 if ((bfd_vma) (wrap - gad->max) < fdplt)
3832 fds = wrap - gad->max;
3841 /* If odd was initially computed as an offset past the wrap point,
3844 odd = gad->min + odd - gad->max;
3846 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3847 before returning, so do it here too. This guarantees that,
3848 should cur and fdcur meet at the wrap point, they'll both be
3850 if (gad->cur == gad->max)
3851 gad->cur = gad->min;
3856 /* Compute the location of the next GOT entry, given the allocation
3857 data for a range. */
3859 inline static bfd_signed_vma
3860 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3866 /* If there was an odd word left behind, use it. */
3872 /* Otherwise, use the word pointed to by cur, reserve the next
3873 as an odd word, and skip to the next pair of words, possibly
3876 gad->odd = gad->cur + 4;
3878 if (gad->cur == gad->max)
3879 gad->cur = gad->min;
3885 /* Compute the location of the next function descriptor entry in the
3886 GOT, given the allocation data for a range. */
3888 inline static bfd_signed_vma
3889 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3891 /* If we're at the bottom, wrap around, and only then allocate the
3892 next pair of words. */
3893 if (gad->fdcur == gad->min)
3894 gad->fdcur = gad->max;
3895 return gad->fdcur -= 8;
3898 /* Assign GOT offsets for every GOT entry and function descriptor.
3899 Doing everything in a single pass is tricky. */
3902 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3904 struct bfinfdpic_relocs_info *entry = *entryp;
3905 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3908 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3909 else if (entry->gothilo)
3910 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3912 if (entry->fdgot17m4)
3913 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3914 else if (entry->fdgothilo)
3915 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3917 if (entry->fdgoff17m4)
3918 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3919 else if (entry->plt && dinfo->got17m4.fdplt)
3921 dinfo->got17m4.fdplt -= 8;
3922 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3924 else if (entry->plt)
3926 dinfo->gothilo.fdplt -= 8;
3927 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3929 else if (entry->privfd)
3930 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3935 /* Assign GOT offsets to private function descriptors used by PLT
3936 entries (or referenced by 32-bit offsets), as well as PLT entries
3937 and lazy PLT entries. */
3940 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3942 struct bfinfdpic_relocs_info *entry = *entryp;
3943 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3945 /* If this symbol requires a local function descriptor, allocate
3947 if (entry->privfd && entry->fd_entry == 0)
3949 if (dinfo->got17m4.fdplt)
3951 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3952 dinfo->got17m4.fdplt -= 8;
3956 BFD_ASSERT (dinfo->gothilo.fdplt);
3957 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3958 dinfo->gothilo.fdplt -= 8;
3966 /* We use the section's raw size to mark the location of the
3968 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3970 /* Figure out the length of this PLT entry based on the
3971 addressing mode we need to reach the function descriptor. */
3972 BFD_ASSERT (entry->fd_entry);
3973 if (entry->fd_entry >= -(1 << (18 - 1))
3974 && entry->fd_entry + 4 < (1 << (18 - 1)))
3979 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3984 entry->lzplt_entry = dinfo->g.lzplt;
3985 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3986 /* If this entry is the one that gets the resolver stub, account
3987 for the additional instruction. */
3988 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3989 == BFINFDPIC_LZPLT_RESOLV_LOC)
3990 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3996 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3997 _bfinfdpic_assign_plt_entries. */
4000 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
4002 struct bfinfdpic_relocs_info *entry = *entryp;
4004 entry->got_entry = 0;
4005 entry->fdgot_entry = 0;
4006 entry->fd_entry = 0;
4007 entry->plt_entry = (bfd_vma)-1;
4008 entry->lzplt_entry = (bfd_vma)-1;
4013 /* Follow indirect and warning hash entries so that each got entry
4014 points to the final symbol definition. P must point to a pointer
4015 to the hash table we're traversing. Since this traversal may
4016 modify the hash table, we set this pointer to NULL to indicate
4017 we've made a potentially-destructive change to the hash table, so
4018 the traversal must be restarted. */
4020 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4022 struct bfinfdpic_relocs_info *entry = *entryp;
4025 if (entry->symndx == -1)
4027 struct elf_link_hash_entry *h = entry->d.h;
4028 struct bfinfdpic_relocs_info *oentry;
4030 while (h->root.type == bfd_link_hash_indirect
4031 || h->root.type == bfd_link_hash_warning)
4032 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4034 if (entry->d.h == h)
4037 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4042 /* Merge the two entries. */
4043 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4044 htab_clear_slot (*htab, entryp);
4050 /* If we can't find this entry with the new bfd hash, re-insert
4051 it, and get the traversal restarted. */
4052 if (! htab_find (*htab, entry))
4054 htab_clear_slot (*htab, entryp);
4055 entryp = htab_find_slot (*htab, entry, INSERT);
4058 /* Abort the traversal, since the whole table may have
4059 moved, and leave it up to the parent to restart the
4061 *(htab_t *)p = NULL;
4069 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4070 section and the rofixup section. Assign locations for GOT and PLT
4074 _bfinfdpic_size_got_plt (bfd *output_bfd,
4075 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4079 struct bfd_link_info *info = gpinfop->g.info;
4080 bfd *dynobj = elf_hash_table (info)->dynobj;
4082 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4083 sizeof (gpinfop->g));
4086 /* Compute the total size taken by entries in the 18-bit range,
4087 to tell how many PLT function descriptors we can bring into it
4088 without causing it to overflow. */
4089 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4090 if (limit < (bfd_vma)1 << 18)
4091 limit = ((bfd_vma)1 << 18) - limit;
4094 if (gpinfop->g.fdplt < limit)
4095 limit = gpinfop->g.fdplt;
4097 /* Determine the ranges of GOT offsets that we can use for each
4098 range of addressing modes. */
4099 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4106 (bfd_vma)1 << (18-1));
4107 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4108 gpinfop->got17m4.min,
4110 gpinfop->got17m4.max,
4113 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4114 (bfd_vma)1 << (32-1));
4116 /* Now assign (most) GOT offsets. */
4117 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4120 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4121 - gpinfop->gothilo.min
4122 /* If an odd word is the last word of the GOT, we don't need this
4123 word to be part of the GOT. */
4124 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4125 if (bfinfdpic_got_section (info)->size == 0)
4126 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4127 else if (bfinfdpic_got_section (info)->size == 12
4128 && ! elf_hash_table (info)->dynamic_sections_created)
4130 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4131 bfinfdpic_got_section (info)->size = 0;
4135 bfinfdpic_got_section (info)->contents =
4136 (bfd_byte *) bfd_zalloc (dynobj,
4137 bfinfdpic_got_section (info)->size);
4138 if (bfinfdpic_got_section (info)->contents == NULL)
4142 if (elf_hash_table (info)->dynamic_sections_created)
4143 /* Subtract the number of lzplt entries, since those will generate
4144 relocations in the pltrel section. */
4145 bfinfdpic_gotrel_section (info)->size =
4146 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4147 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4149 BFD_ASSERT (gpinfop->g.relocs == 0);
4150 if (bfinfdpic_gotrel_section (info)->size == 0)
4151 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4154 bfinfdpic_gotrel_section (info)->contents =
4155 (bfd_byte *) bfd_zalloc (dynobj,
4156 bfinfdpic_gotrel_section (info)->size);
4157 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4161 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4162 if (bfinfdpic_gotfixup_section (info)->size == 0)
4163 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4166 bfinfdpic_gotfixup_section (info)->contents =
4167 (bfd_byte *) bfd_zalloc (dynobj,
4168 bfinfdpic_gotfixup_section (info)->size);
4169 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4173 if (elf_hash_table (info)->dynamic_sections_created)
4174 bfinfdpic_pltrel_section (info)->size =
4175 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4176 if (bfinfdpic_pltrel_section (info)->size == 0)
4177 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4180 bfinfdpic_pltrel_section (info)->contents =
4181 (bfd_byte *) bfd_zalloc (dynobj,
4182 bfinfdpic_pltrel_section (info)->size);
4183 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4187 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4188 such that there's room for the additional instruction needed to
4189 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4190 account for them, our block size is 4 bytes smaller than the real
4192 if (elf_hash_table (info)->dynamic_sections_created)
4194 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4195 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4196 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4199 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4200 actually assign lazy PLT entries addresses. */
4201 gpinfop->g.lzplt = 0;
4203 /* Save information that we're going to need to generate GOT and PLT
4205 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4207 if (get_elf_backend_data (output_bfd)->want_got_sym)
4208 elf_hash_table (info)->hgot->root.u.def.value
4209 = bfinfdpic_got_initial_offset (info);
4211 if (elf_hash_table (info)->dynamic_sections_created)
4212 bfinfdpic_plt_initial_offset (info) =
4213 bfinfdpic_plt_section (info)->size;
4215 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4218 /* Allocate the PLT section contents only after
4219 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4220 non-lazy PLT entries. */
4221 if (bfinfdpic_plt_section (info)->size == 0)
4222 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4225 bfinfdpic_plt_section (info)->contents =
4226 (bfd_byte *) bfd_zalloc (dynobj,
4227 bfinfdpic_plt_section (info)->size);
4228 if (bfinfdpic_plt_section (info)->contents == NULL)
4235 /* Set the sizes of the dynamic sections. */
4238 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4239 struct bfd_link_info *info)
4241 struct elf_link_hash_table *htab;
4244 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4246 htab = elf_hash_table (info);
4247 dynobj = htab->dynobj;
4248 BFD_ASSERT (dynobj != NULL);
4250 if (htab->dynamic_sections_created)
4252 /* Set the contents of the .interp section to the interpreter. */
4253 if (bfd_link_executable (info) && !info->nointerp)
4255 s = bfd_get_linker_section (dynobj, ".interp");
4256 BFD_ASSERT (s != NULL);
4257 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4258 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4262 memset (&gpinfo, 0, sizeof (gpinfo));
4263 gpinfo.g.info = info;
4267 htab_t relocs = bfinfdpic_relocs_info (info);
4269 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4271 if (relocs == bfinfdpic_relocs_info (info))
4275 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4278 /* Allocate space to save the summary information, we're going to
4279 use it if we're doing relaxations. */
4280 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4282 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4285 if (elf_hash_table (info)->dynamic_sections_created)
4287 if (bfinfdpic_got_section (info)->size)
4288 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4291 if (bfinfdpic_pltrel_section (info)->size)
4292 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4293 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4294 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4297 if (bfinfdpic_gotrel_section (info)->size)
4298 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4299 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4300 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4301 sizeof (Elf32_External_Rel)))
4305 s = bfd_get_linker_section (dynobj, ".dynbss");
4306 if (s && s->size == 0)
4307 s->flags |= SEC_EXCLUDE;
4309 s = bfd_get_linker_section (dynobj, ".rela.bss");
4310 if (s && s->size == 0)
4311 s->flags |= SEC_EXCLUDE;
4317 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4318 struct bfd_link_info *info)
4320 if (!bfd_link_relocatable (info)
4321 && !bfd_elf_stack_segment_size (output_bfd, info,
4322 "__stacksize", DEFAULT_STACK_SIZE))
4328 /* Check whether any of the relocations was optimized away, and
4329 subtract it from the relocation or fixup count. */
4331 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4332 struct bfd_link_info *info,
4333 bfd_boolean *changed)
4335 Elf_Internal_Shdr *symtab_hdr;
4336 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4337 Elf_Internal_Rela *rel, *erel;
4339 if ((sec->flags & SEC_RELOC) == 0
4340 || sec->reloc_count == 0)
4343 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4344 sym_hashes = elf_sym_hashes (abfd);
4345 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4346 if (!elf_bad_symtab (abfd))
4347 sym_hashes_end -= symtab_hdr->sh_info;
4349 rel = elf_section_data (sec)->relocs;
4351 /* Now examine each relocation. */
4352 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4354 struct elf_link_hash_entry *h;
4355 unsigned long r_symndx;
4356 struct bfinfdpic_relocs_info *picrel;
4357 struct _bfinfdpic_dynamic_got_info *dinfo;
4359 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4360 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4363 if (_bfd_elf_section_offset (sec->output_section->owner,
4364 info, sec, rel->r_offset)
4368 r_symndx = ELF32_R_SYM (rel->r_info);
4369 if (r_symndx < symtab_hdr->sh_info)
4373 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4374 while (h->root.type == bfd_link_hash_indirect
4375 || h->root.type == bfd_link_hash_warning)
4376 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4380 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4382 rel->r_addend, NO_INSERT);
4384 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4386 rel->r_addend, NO_INSERT);
4392 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4394 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4395 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4397 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4399 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4406 bfinfdpic_elf_discard_info (bfd *ibfd,
4407 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4408 struct bfd_link_info *info)
4410 bfd_boolean changed = FALSE;
4414 /* Account for relaxation of .eh_frame section. */
4415 for (s = ibfd->sections; s; s = s->next)
4416 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4418 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4420 obfd = s->output_section->owner;
4425 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4427 memset (&gpinfo, 0, sizeof (gpinfo));
4428 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4431 /* Clear GOT and PLT assignments. */
4432 htab_traverse (bfinfdpic_relocs_info (info),
4433 _bfinfdpic_reset_got_plt_entries,
4436 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4444 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4445 struct bfd_link_info *info)
4450 dynobj = elf_hash_table (info)->dynobj;
4452 if (bfinfdpic_got_section (info))
4454 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4455 /* PR 17334: It appears that the GOT section can end up
4456 being bigger than the number of relocs. Presumably
4457 because some relocs have been deleted. A test case has
4458 yet to be generated for verify this, but in the meantime
4459 the test below has been changed from == to >= so that
4460 applications can continue to be built. */
4461 >= (bfinfdpic_gotrel_section (info)->reloc_count
4462 * sizeof (Elf32_External_Rel)));
4464 if (bfinfdpic_gotfixup_section (info))
4466 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4467 bfd_vma got_value = hgot->root.u.def.value
4468 + hgot->root.u.def.section->output_section->vma
4469 + hgot->root.u.def.section->output_offset;
4471 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4474 if (bfinfdpic_gotfixup_section (info)->size
4475 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4478 ("LINKER BUG: .rofixup section size mismatch");
4483 if (elf_hash_table (info)->dynamic_sections_created)
4485 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4486 == (bfinfdpic_pltrel_section (info)->reloc_count
4487 * sizeof (Elf32_External_Rel)));
4490 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4492 if (elf_hash_table (info)->dynamic_sections_created)
4494 Elf32_External_Dyn * dyncon;
4495 Elf32_External_Dyn * dynconend;
4497 BFD_ASSERT (sdyn != NULL);
4499 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4500 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4502 for (; dyncon < dynconend; dyncon++)
4504 Elf_Internal_Dyn dyn;
4506 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4514 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4515 + bfinfdpic_got_section (info)->output_offset
4516 + bfinfdpic_got_initial_offset (info);
4517 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4521 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4522 ->output_section->vma
4523 + bfinfdpic_pltrel_section (info)->output_offset;
4524 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4528 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4529 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4538 /* Adjust a symbol defined by a dynamic object and referenced by a
4542 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info,
4543 struct elf_link_hash_entry *h)
4547 dynobj = elf_hash_table (info)->dynobj;
4549 /* Make sure we know what is going on here. */
4550 BFD_ASSERT (dynobj != NULL
4551 && (h->u.weakdef != NULL
4554 && !h->def_regular)));
4556 /* If this is a weak symbol, and there is a real definition, the
4557 processor independent code will have arranged for us to see the
4558 real definition first, and we can just use the same value. */
4559 if (h->u.weakdef != NULL)
4561 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4562 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4563 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4564 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4570 /* Perform any actions needed for dynamic symbols. */
4573 elf32_bfinfdpic_finish_dynamic_symbol
4574 (bfd *output_bfd ATTRIBUTE_UNUSED,
4575 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4576 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4577 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4582 /* Decide whether to attempt to turn absptr or lsda encodings in
4583 shared libraries into pcrel within the given input section. */
4586 bfinfdpic_elf_use_relative_eh_frame
4587 (bfd *input_bfd ATTRIBUTE_UNUSED,
4588 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4589 asection *eh_frame_section ATTRIBUTE_UNUSED)
4591 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4595 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4598 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4599 struct bfd_link_info *info,
4600 asection *osec, bfd_vma offset,
4601 asection *loc_sec, bfd_vma loc_offset,
4604 struct elf_link_hash_entry *h;
4606 h = elf_hash_table (info)->hgot;
4607 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4609 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4610 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4611 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4612 loc_sec, loc_offset, encoded);
4614 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4615 == (_bfinfdpic_osec_to_segment
4616 (abfd, h->root.u.def.section->output_section)));
4618 *encoded = osec->vma + offset
4619 - (h->root.u.def.value
4620 + h->root.u.def.section->output_section->vma
4621 + h->root.u.def.section->output_offset);
4623 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4628 /* Look through the relocs for a section during the first phase.
4630 Besides handling virtual table relocs for gc, we have to deal with
4631 all sorts of PIC-related relocations. We describe below the
4632 general plan on how to handle such relocations, even though we only
4633 collect information at this point, storing them in hash tables for
4634 perusal of later passes.
4636 32 relocations are propagated to the linker output when creating
4637 position-independent output. LO16 and HI16 relocations are not
4638 supposed to be encountered in this case.
4640 LABEL16 should always be resolvable by the linker, since it's only
4643 LABEL24, on the other hand, is used by calls. If it turns out that
4644 the target of a call is a dynamic symbol, a PLT entry must be
4645 created for it, which triggers the creation of a private function
4646 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4648 GPREL relocations require the referenced symbol to be in the same
4649 segment as _gp, but this can only be checked later.
4651 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4652 exist. LABEL24 might as well, since it may require a PLT entry,
4653 that will require a got.
4655 Non-FUNCDESC GOT relocations require a GOT entry to be created
4656 regardless of whether the symbol is dynamic. However, since a
4657 global symbol that turns out to not be exported may have the same
4658 address of a non-dynamic symbol, we don't assign GOT entries at
4659 this point, such that we can share them in this case. A relocation
4660 for the GOT entry always has to be created, be it to offset a
4661 private symbol by the section load address, be it to get the symbol
4662 resolved dynamically.
4664 FUNCDESC GOT relocations require a GOT entry to be created, and
4665 handled as if a FUNCDESC relocation was applied to the GOT entry in
4668 FUNCDESC relocations referencing a symbol that turns out to NOT be
4669 dynamic cause a private function descriptor to be created. The
4670 FUNCDESC relocation then decays to a 32 relocation that points at
4671 the private descriptor. If the symbol is dynamic, the FUNCDESC
4672 relocation is propagated to the linker output, such that the
4673 dynamic linker creates the canonical descriptor, pointing to the
4674 dynamically-resolved definition of the function.
4676 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4677 symbols that are assigned to the same segment as the GOT, but we
4678 can only check this later, after we know the complete set of
4679 symbols defined and/or exported.
4681 FUNCDESC GOTOFF relocations require a function descriptor to be
4682 created and, unless lazy binding is disabled or the symbol is not
4683 dynamic, a lazy PLT entry. Since we can't tell at this point
4684 whether a symbol is going to be dynamic, we have to decide later
4685 whether to create a lazy PLT entry or bind the descriptor directly
4686 to the private function.
4688 FUNCDESC_VALUE relocations are not supposed to be present in object
4689 files, but they may very well be simply propagated to the linker
4690 output, since they have no side effect.
4693 A function descriptor always requires a FUNCDESC_VALUE relocation.
4694 Whether it's in .plt.rel or not depends on whether lazy binding is
4695 enabled and on whether the referenced symbol is dynamic.
4697 The existence of a lazy PLT requires the resolverStub lazy PLT
4698 entry to be present.
4701 As for assignment of GOT, PLT and lazy PLT entries, and private
4702 descriptors, we might do them all sequentially, but we can do
4703 better than that. For example, we can place GOT entries and
4704 private function descriptors referenced using 12-bit operands
4705 closer to the PIC register value, such that these relocations don't
4706 overflow. Those that are only referenced with LO16 relocations
4707 could come next, but we may as well place PLT-required function
4708 descriptors in the 12-bit range to make them shorter. Symbols
4709 referenced with LO16/HI16 may come next, but we may place
4710 additional function descriptors in the 16-bit range if we can
4711 reliably tell that we've already placed entries that are ever
4712 referenced with only LO16. PLT entries are therefore generated as
4713 small as possible, while not introducing relocation overflows in
4714 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4715 generated before or after PLT entries, but not intermingled with
4716 them, such that we can have more lazy PLT entries in range for a
4717 branch to the resolverStub. The resolverStub should be emitted at
4718 the most distant location from the first lazy PLT entry such that
4719 it's still in range for a branch, or closer, if there isn't a need
4720 for so many lazy PLT entries. Additional lazy PLT entries may be
4721 emitted after the resolverStub, as long as branches are still in
4722 range. If the branch goes out of range, longer lazy PLT entries
4725 We could further optimize PLT and lazy PLT entries by giving them
4726 priority in assignment to closer-to-gr17 locations depending on the
4727 number of occurrences of references to them (assuming a function
4728 that's called more often is more important for performance, so its
4729 PLT entry should be faster), or taking hints from the compiler.
4730 Given infinite time and money... :-) */
4733 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4734 asection *sec, const Elf_Internal_Rela *relocs)
4736 Elf_Internal_Shdr *symtab_hdr;
4737 struct elf_link_hash_entry **sym_hashes;
4738 const Elf_Internal_Rela *rel;
4739 const Elf_Internal_Rela *rel_end;
4741 struct bfinfdpic_relocs_info *picrel;
4743 if (bfd_link_relocatable (info))
4746 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4747 sym_hashes = elf_sym_hashes (abfd);
4749 dynobj = elf_hash_table (info)->dynobj;
4750 rel_end = relocs + sec->reloc_count;
4751 for (rel = relocs; rel < rel_end; rel++)
4753 struct elf_link_hash_entry *h;
4754 unsigned long r_symndx;
4756 r_symndx = ELF32_R_SYM (rel->r_info);
4757 if (r_symndx < symtab_hdr->sh_info)
4760 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4762 switch (ELF32_R_TYPE (rel->r_info))
4764 case R_BFIN_GOT17M4:
4767 case R_BFIN_FUNCDESC_GOT17M4:
4768 case R_BFIN_FUNCDESC_GOTHI:
4769 case R_BFIN_FUNCDESC_GOTLO:
4770 case R_BFIN_GOTOFF17M4:
4771 case R_BFIN_GOTOFFHI:
4772 case R_BFIN_GOTOFFLO:
4773 case R_BFIN_FUNCDESC_GOTOFF17M4:
4774 case R_BFIN_FUNCDESC_GOTOFFHI:
4775 case R_BFIN_FUNCDESC_GOTOFFLO:
4776 case R_BFIN_FUNCDESC:
4777 case R_BFIN_FUNCDESC_VALUE:
4778 if (! IS_FDPIC (abfd))
4781 case R_BFIN_PCREL24:
4782 case R_BFIN_PCREL24_JUMP_L:
4783 case R_BFIN_BYTE4_DATA:
4784 if (IS_FDPIC (abfd) && ! dynobj)
4786 elf_hash_table (info)->dynobj = dynobj = abfd;
4787 if (! _bfin_create_got_section (abfd, info))
4790 if (! IS_FDPIC (abfd))
4797 if (h->dynindx == -1)
4798 switch (ELF_ST_VISIBILITY (h->other))
4804 bfd_elf_link_record_dynamic_symbol (info, h);
4808 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4810 rel->r_addend, INSERT);
4813 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4814 (info), abfd, r_symndx,
4815 rel->r_addend, INSERT);
4825 switch (ELF32_R_TYPE (rel->r_info))
4827 case R_BFIN_PCREL24:
4828 case R_BFIN_PCREL24_JUMP_L:
4829 if (IS_FDPIC (abfd))
4833 case R_BFIN_FUNCDESC_VALUE:
4834 picrel->relocsfdv++;
4835 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4839 case R_BFIN_BYTE4_DATA:
4840 if (! IS_FDPIC (abfd))
4844 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4848 case R_BFIN_GOT17M4:
4857 case R_BFIN_FUNCDESC_GOT17M4:
4858 picrel->fdgot17m4++;
4861 case R_BFIN_FUNCDESC_GOTHI:
4862 case R_BFIN_FUNCDESC_GOTLO:
4863 picrel->fdgothilo++;
4866 case R_BFIN_GOTOFF17M4:
4867 case R_BFIN_GOTOFFHI:
4868 case R_BFIN_GOTOFFLO:
4872 case R_BFIN_FUNCDESC_GOTOFF17M4:
4873 picrel->fdgoff17m4++;
4876 case R_BFIN_FUNCDESC_GOTOFFHI:
4877 case R_BFIN_FUNCDESC_GOTOFFLO:
4878 picrel->fdgoffhilo++;
4881 case R_BFIN_FUNCDESC:
4886 /* This relocation describes the C++ object vtable hierarchy.
4887 Reconstruct it for later use during GC. */
4888 case R_BFIN_GNU_VTINHERIT:
4889 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4893 /* This relocation describes which C++ vtable entries are actually
4894 used. Record for later use during GC. */
4895 case R_BFIN_GNU_VTENTRY:
4896 BFD_ASSERT (h != NULL);
4898 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4902 case R_BFIN_HUIMM16:
4903 case R_BFIN_LUIMM16:
4904 case R_BFIN_PCREL12_JUMP_S:
4905 case R_BFIN_PCREL10:
4911 (_("%B: unsupported relocation type %i"),
4912 abfd, ELF32_R_TYPE (rel->r_info));
4920 /* Set the right machine number for a Blackfin ELF file. */
4923 elf32_bfin_object_p (bfd *abfd)
4925 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4926 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4927 == (IS_FDPIC (abfd)));
4931 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4933 elf_elfheader (abfd)->e_flags = flags;
4934 elf_flags_init (abfd) = TRUE;
4938 /* Display the flags field. */
4940 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr)
4942 FILE *file = (FILE *) ptr;
4945 BFD_ASSERT (abfd != NULL && ptr != NULL);
4947 /* Print normal ELF private data. */
4948 _bfd_elf_print_private_bfd_data (abfd, ptr);
4950 flags = elf_elfheader (abfd)->e_flags;
4952 /* xgettext:c-format */
4953 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4955 if (flags & EF_BFIN_PIC)
4956 fprintf (file, " -fpic");
4958 if (flags & EF_BFIN_FDPIC)
4959 fprintf (file, " -mfdpic");
4966 /* Merge backend specific data from an object file to the output
4967 object file when linking. */
4970 elf32_bfin_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4972 bfd *obfd = info->output_bfd;
4973 flagword old_flags, new_flags;
4974 bfd_boolean error = FALSE;
4976 new_flags = elf_elfheader (ibfd)->e_flags;
4977 old_flags = elf_elfheader (obfd)->e_flags;
4979 if (new_flags & EF_BFIN_FDPIC)
4980 new_flags &= ~EF_BFIN_PIC;
4986 ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4987 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4988 bfd_get_filename (ibfd));
4990 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4992 elf_flags_init (obfd) = TRUE;
4993 elf_elfheader (obfd)->e_flags = new_flags;
4996 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
4999 if (IS_FDPIC (obfd))
5001 (_("%s: cannot link non-fdpic object file into fdpic executable"),
5002 bfd_get_filename (ibfd));
5005 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5006 bfd_get_filename (ibfd));
5010 bfd_set_error (bfd_error_bad_value);
5015 /* bfin ELF linker hash entry. */
5017 struct bfin_link_hash_entry
5019 struct elf_link_hash_entry root;
5021 /* Number of PC relative relocs copied for this symbol. */
5022 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5025 /* bfin ELF linker hash table. */
5027 struct bfin_link_hash_table
5029 struct elf_link_hash_table root;
5031 /* Small local sym cache. */
5032 struct sym_cache sym_cache;
5035 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5037 static struct bfd_hash_entry *
5038 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5039 struct bfd_hash_table *table, const char *string)
5041 struct bfd_hash_entry *ret = entry;
5043 /* Allocate the structure if it has not already been allocated by a
5046 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5050 /* Call the allocation method of the superclass. */
5051 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5053 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5058 /* Create an bfin ELF linker hash table. */
5060 static struct bfd_link_hash_table *
5061 bfin_link_hash_table_create (bfd * abfd)
5063 struct bfin_link_hash_table *ret;
5064 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5066 ret = bfd_zmalloc (amt);
5070 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5071 bfin_link_hash_newfunc,
5072 sizeof (struct elf_link_hash_entry),
5079 ret->sym_cache.abfd = NULL;
5081 return &ret->root.root;
5084 /* The size in bytes of an entry in the procedure linkage table. */
5086 /* Finish up the dynamic sections. */
5089 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5090 struct bfd_link_info *info)
5095 dynobj = elf_hash_table (info)->dynobj;
5097 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5099 if (elf_hash_table (info)->dynamic_sections_created)
5101 Elf32_External_Dyn *dyncon, *dynconend;
5103 BFD_ASSERT (sdyn != NULL);
5105 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5106 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5107 for (; dyncon < dynconend; dyncon++)
5109 Elf_Internal_Dyn dyn;
5111 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5119 /* Finish up dynamic symbol handling. We set the contents of various
5120 dynamic sections here. */
5123 bfin_finish_dynamic_symbol (bfd * output_bfd,
5124 struct bfd_link_info *info,
5125 struct elf_link_hash_entry *h,
5126 Elf_Internal_Sym * sym)
5130 dynobj = elf_hash_table (info)->dynobj;
5132 if (h->got.offset != (bfd_vma) - 1)
5136 Elf_Internal_Rela rela;
5139 /* This symbol has an entry in the global offset table.
5142 sgot = bfd_get_linker_section (dynobj, ".got");
5143 srela = bfd_get_linker_section (dynobj, ".rela.got");
5144 BFD_ASSERT (sgot != NULL && srela != NULL);
5146 rela.r_offset = (sgot->output_section->vma
5147 + sgot->output_offset
5148 + (h->got.offset & ~(bfd_vma) 1));
5150 /* If this is a -Bsymbolic link, and the symbol is defined
5151 locally, we just want to emit a RELATIVE reloc. Likewise if
5152 the symbol was forced to be local because of a version file.
5153 The entry in the global offset table will already have been
5154 initialized in the relocate_section function. */
5155 if (bfd_link_pic (info)
5157 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5159 _bfd_error_handler (_("*** check this relocation %s"),
5161 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5162 rela.r_addend = bfd_get_signed_32 (output_bfd,
5166 offset & ~(bfd_vma) 1)));
5170 bfd_put_32 (output_bfd, (bfd_vma) 0,
5171 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5172 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5176 loc = srela->contents;
5177 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5178 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5185 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5186 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5187 || h == elf_hash_table (info)->hgot)
5188 sym->st_shndx = SHN_ABS;
5193 /* Adjust a symbol defined by a dynamic object and referenced by a
5194 regular object. The current definition is in some section of the
5195 dynamic object, but we're not including those sections. We have to
5196 change the definition to something the rest of the link can
5200 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5201 struct elf_link_hash_entry *h)
5205 unsigned int power_of_two;
5207 dynobj = elf_hash_table (info)->dynobj;
5209 /* Make sure we know what is going on here. */
5210 BFD_ASSERT (dynobj != NULL
5212 || h->u.weakdef != NULL
5213 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5215 /* If this is a function, put it in the procedure linkage table. We
5216 will fill in the contents of the procedure linkage table later,
5217 when we know the address of the .got section. */
5218 if (h->type == STT_FUNC || h->needs_plt)
5223 /* If this is a weak symbol, and there is a real definition, the
5224 processor independent code will have arranged for us to see the
5225 real definition first, and we can just use the same value. */
5226 if (h->u.weakdef != NULL)
5228 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5229 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5230 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5231 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5235 /* This is a reference to a symbol defined by a dynamic object which
5236 is not a function. */
5238 /* If we are creating a shared library, we must presume that the
5239 only references to the symbol are via the global offset table.
5240 For such cases we need not do anything here; the relocations will
5241 be handled correctly by relocate_section. */
5242 if (bfd_link_pic (info))
5245 /* We must allocate the symbol in our .dynbss section, which will
5246 become part of the .bss section of the executable. There will be
5247 an entry for this symbol in the .dynsym section. The dynamic
5248 object will contain position independent code, so all references
5249 from the dynamic object to this symbol will go through the global
5250 offset table. The dynamic linker will use the .dynsym entry to
5251 determine the address it must put in the global offset table, so
5252 both the dynamic object and the regular object will refer to the
5253 same memory location for the variable. */
5255 s = bfd_get_linker_section (dynobj, ".dynbss");
5256 BFD_ASSERT (s != NULL);
5258 #if 0 /* Bfin does not currently have a COPY reloc. */
5259 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5260 copy the initial value out of the dynamic object and into the
5261 runtime process image. We need to remember the offset into the
5262 .rela.bss section we are going to use. */
5263 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5267 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5268 BFD_ASSERT (srel != NULL);
5269 srel->size += sizeof (Elf32_External_Rela);
5273 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5275 _bfd_error_handler (_("the bfin target does not currently support the generation of copy relocations"));
5279 /* We need to figure out the alignment required for this symbol. I
5280 have no idea how ELF linkers handle this. */
5281 power_of_two = bfd_log2 (h->size);
5282 if (power_of_two > 3)
5285 /* Apply the required alignment. */
5286 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5287 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5289 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5293 /* Define the symbol as being at this point in the section. */
5294 h->root.u.def.section = s;
5295 h->root.u.def.value = s->size;
5297 /* Increment the section size to make room for the symbol. */
5303 /* The bfin linker needs to keep track of the number of relocs that it
5304 decides to copy in check_relocs for each symbol. This is so that it
5305 can discard PC relative relocs if it doesn't need them when linking
5306 with -Bsymbolic. We store the information in a field extending the
5307 regular ELF linker hash table. */
5309 /* This structure keeps track of the number of PC relative relocs we have
5310 copied for a given symbol. */
5312 struct bfin_pcrel_relocs_copied
5315 struct bfin_pcrel_relocs_copied *next;
5316 /* A section in dynobj. */
5318 /* Number of relocs copied in this section. */
5319 bfd_size_type count;
5322 /* This function is called via elf_link_hash_traverse if we are
5323 creating a shared object. In the -Bsymbolic case it discards the
5324 space allocated to copy PC relative relocs against symbols which
5325 are defined in regular objects. For the normal shared case, it
5326 discards space for pc-relative relocs that have become local due to
5327 symbol visibility changes. We allocated space for them in the
5328 check_relocs routine, but we won't fill them in in the
5329 relocate_section routine.
5331 We also check whether any of the remaining relocations apply
5332 against a readonly section, and set the DF_TEXTREL flag in this
5336 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5338 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5339 struct bfin_pcrel_relocs_copied *s;
5341 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5343 if ((info->flags & DF_TEXTREL) == 0)
5345 /* Look for relocations against read-only sections. */
5346 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5347 s != NULL; s = s->next)
5348 if ((s->section->flags & SEC_READONLY) != 0)
5350 info->flags |= DF_TEXTREL;
5358 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5359 s != NULL; s = s->next)
5360 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5366 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5367 struct bfd_link_info *info)
5373 dynobj = elf_hash_table (info)->dynobj;
5374 BFD_ASSERT (dynobj != NULL);
5376 if (elf_hash_table (info)->dynamic_sections_created)
5378 /* Set the contents of the .interp section to the interpreter. */
5379 if (bfd_link_executable (info))
5381 s = bfd_get_linker_section (dynobj, ".interp");
5382 BFD_ASSERT (s != NULL);
5383 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5384 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5389 /* We may have created entries in the .rela.got section.
5390 However, if we are not creating the dynamic sections, we will
5391 not actually use these entries. Reset the size of .rela.got,
5392 which will cause it to get stripped from the output file
5394 s = bfd_get_linker_section (dynobj, ".rela.got");
5399 /* If this is a -Bsymbolic shared link, then we need to discard all
5400 PC relative relocs against symbols defined in a regular object.
5401 For the normal shared case we discard the PC relative relocs
5402 against symbols that have become local due to visibility changes.
5403 We allocated space for them in the check_relocs routine, but we
5404 will not fill them in in the relocate_section routine. */
5405 if (bfd_link_pic (info))
5406 elf_link_hash_traverse (elf_hash_table (info),
5407 bfin_discard_copies, info);
5409 /* The check_relocs and adjust_dynamic_symbol entry points have
5410 determined the sizes of the various dynamic sections. Allocate
5413 for (s = dynobj->sections; s != NULL; s = s->next)
5418 if ((s->flags & SEC_LINKER_CREATED) == 0)
5421 /* It's OK to base decisions on the section name, because none
5422 of the dynobj section names depend upon the input files. */
5423 name = bfd_get_section_name (dynobj, s);
5427 if (CONST_STRNEQ (name, ".rela"))
5431 /* If we don't need this section, strip it from the
5432 output file. This is mostly to handle .rela.bss and
5433 .rela.plt. We must create both sections in
5434 create_dynamic_sections, because they must be created
5435 before the linker maps input sections to output
5436 sections. The linker does that before
5437 adjust_dynamic_symbol is called, and it is that
5438 function which decides whether anything needs to go
5439 into these sections. */
5446 /* We use the reloc_count field as a counter if we need
5447 to copy relocs into the output file. */
5451 else if (! CONST_STRNEQ (name, ".got"))
5453 /* It's not one of our sections, so don't allocate space. */
5459 s->flags |= SEC_EXCLUDE;
5463 /* Allocate memory for the section contents. */
5464 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5465 Unused entries should be reclaimed before the section's contents
5466 are written out, but at the moment this does not happen. Thus in
5467 order to prevent writing out garbage, we initialise the section's
5468 contents to zero. */
5469 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5470 if (s->contents == NULL && s->size != 0)
5474 if (elf_hash_table (info)->dynamic_sections_created)
5476 /* Add some entries to the .dynamic section. We fill in the
5477 values later, in bfin_finish_dynamic_sections, but we
5478 must add the entries now so that we get the correct size for
5479 the .dynamic section. The DT_DEBUG entry is filled in by the
5480 dynamic linker and used by the debugger. */
5481 #define add_dynamic_entry(TAG, VAL) \
5482 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5484 if (!bfd_link_pic (info))
5486 if (!add_dynamic_entry (DT_DEBUG, 0))
5493 if (!add_dynamic_entry (DT_RELA, 0)
5494 || !add_dynamic_entry (DT_RELASZ, 0)
5495 || !add_dynamic_entry (DT_RELAENT,
5496 sizeof (Elf32_External_Rela)))
5500 if ((info->flags & DF_TEXTREL) != 0)
5502 if (!add_dynamic_entry (DT_TEXTREL, 0))
5506 #undef add_dynamic_entry
5511 /* Given a .data section and a .emreloc in-memory section, store
5512 relocation information into the .emreloc section which can be
5513 used at runtime to relocate the section. This is called by the
5514 linker when the --embedded-relocs switch is used. This is called
5515 after the add_symbols entry point has been called for all the
5516 objects, and before the final_link entry point is called. */
5519 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5520 struct bfd_link_info *info,
5525 Elf_Internal_Shdr *symtab_hdr;
5526 Elf_Internal_Sym *isymbuf = NULL;
5527 Elf_Internal_Rela *internal_relocs = NULL;
5528 Elf_Internal_Rela *irel, *irelend;
5532 BFD_ASSERT (! bfd_link_relocatable (info));
5536 if (datasec->reloc_count == 0)
5539 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5541 /* Get a copy of the native relocations. */
5542 internal_relocs = (_bfd_elf_link_read_relocs
5543 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5544 info->keep_memory));
5545 if (internal_relocs == NULL)
5548 amt = (bfd_size_type) datasec->reloc_count * 12;
5549 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5550 if (relsec->contents == NULL)
5553 p = relsec->contents;
5555 irelend = internal_relocs + datasec->reloc_count;
5556 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5558 asection *targetsec;
5560 /* We are going to write a four byte longword into the runtime
5561 reloc section. The longword will be the address in the data
5562 section which must be relocated. It is followed by the name
5563 of the target section NUL-padded or truncated to 8
5566 /* We can only relocate absolute longword relocs at run time. */
5567 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5569 *errmsg = _("unsupported reloc type");
5570 bfd_set_error (bfd_error_bad_value);
5574 /* Get the target section referred to by the reloc. */
5575 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5577 /* A local symbol. */
5578 Elf_Internal_Sym *isym;
5580 /* Read this BFD's local symbols if we haven't done so already. */
5581 if (isymbuf == NULL)
5583 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5584 if (isymbuf == NULL)
5585 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5586 symtab_hdr->sh_info, 0,
5588 if (isymbuf == NULL)
5592 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5593 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5598 struct elf_link_hash_entry *h;
5600 /* An external symbol. */
5601 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5602 h = elf_sym_hashes (abfd)[indx];
5603 BFD_ASSERT (h != NULL);
5604 if (h->root.type == bfd_link_hash_defined
5605 || h->root.type == bfd_link_hash_defweak)
5606 targetsec = h->root.u.def.section;
5611 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5612 memset (p + 4, 0, 8);
5613 if (targetsec != NULL)
5614 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5617 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5619 if (internal_relocs != NULL
5620 && elf_section_data (datasec)->relocs != internal_relocs)
5621 free (internal_relocs);
5625 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5627 if (internal_relocs != NULL
5628 && elf_section_data (datasec)->relocs != internal_relocs)
5629 free (internal_relocs);
5633 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5635 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5636 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5637 { NULL, 0, 0, 0, 0 }
5641 #define TARGET_LITTLE_SYM bfin_elf32_vec
5642 #define TARGET_LITTLE_NAME "elf32-bfin"
5643 #define ELF_ARCH bfd_arch_bfin
5644 #define ELF_TARGET_ID BFIN_ELF_DATA
5645 #define ELF_MACHINE_CODE EM_BLACKFIN
5646 #define ELF_MAXPAGESIZE 0x1000
5647 #define elf_symbol_leading_char '_'
5649 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5650 #define bfd_elf32_bfd_reloc_name_lookup \
5651 bfin_bfd_reloc_name_lookup
5652 #define elf_info_to_howto bfin_info_to_howto
5653 #define elf_info_to_howto_rel 0
5654 #define elf_backend_object_p elf32_bfin_object_p
5656 #define bfd_elf32_bfd_is_local_label_name \
5657 bfin_is_local_label_name
5658 #define bfin_hash_table(p) \
5659 ((struct bfin_link_hash_table *) (p)->hash)
5663 #define elf_backend_create_dynamic_sections \
5664 _bfd_elf_create_dynamic_sections
5665 #define bfd_elf32_bfd_link_hash_table_create \
5666 bfin_link_hash_table_create
5667 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5669 #define elf_backend_check_relocs bfin_check_relocs
5670 #define elf_backend_adjust_dynamic_symbol \
5671 bfin_adjust_dynamic_symbol
5672 #define elf_backend_size_dynamic_sections \
5673 bfin_size_dynamic_sections
5674 #define elf_backend_relocate_section bfin_relocate_section
5675 #define elf_backend_finish_dynamic_symbol \
5676 bfin_finish_dynamic_symbol
5677 #define elf_backend_finish_dynamic_sections \
5678 bfin_finish_dynamic_sections
5679 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5680 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5681 #define bfd_elf32_bfd_merge_private_bfd_data \
5682 elf32_bfin_merge_private_bfd_data
5683 #define bfd_elf32_bfd_set_private_flags \
5684 elf32_bfin_set_private_flags
5685 #define bfd_elf32_bfd_print_private_bfd_data \
5686 elf32_bfin_print_private_bfd_data
5687 #define elf_backend_final_write_processing \
5688 elf32_bfin_final_write_processing
5689 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5690 #define elf_backend_stack_align 8
5691 #define elf_backend_can_gc_sections 1
5692 #define elf_backend_special_sections elf32_bfin_special_sections
5693 #define elf_backend_can_refcount 1
5694 #define elf_backend_want_got_plt 0
5695 #define elf_backend_plt_readonly 1
5696 #define elf_backend_want_plt_sym 0
5697 #define elf_backend_got_header_size 12
5698 #define elf_backend_rela_normal 1
5700 #include "elf32-target.h"
5702 #undef TARGET_LITTLE_SYM
5703 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5704 #undef TARGET_LITTLE_NAME
5705 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5707 #define elf32_bed elf32_bfinfdpic_bed
5709 #undef elf_backend_gc_sweep_hook
5710 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5712 #undef elf_backend_got_header_size
5713 #define elf_backend_got_header_size 0
5715 #undef elf_backend_relocate_section
5716 #define elf_backend_relocate_section bfinfdpic_relocate_section
5717 #undef elf_backend_check_relocs
5718 #define elf_backend_check_relocs bfinfdpic_check_relocs
5720 #undef bfd_elf32_bfd_link_hash_table_create
5721 #define bfd_elf32_bfd_link_hash_table_create \
5722 bfinfdpic_elf_link_hash_table_create
5723 #undef elf_backend_always_size_sections
5724 #define elf_backend_always_size_sections \
5725 elf32_bfinfdpic_always_size_sections
5727 #undef elf_backend_create_dynamic_sections
5728 #define elf_backend_create_dynamic_sections \
5729 elf32_bfinfdpic_create_dynamic_sections
5730 #undef elf_backend_adjust_dynamic_symbol
5731 #define elf_backend_adjust_dynamic_symbol \
5732 elf32_bfinfdpic_adjust_dynamic_symbol
5733 #undef elf_backend_size_dynamic_sections
5734 #define elf_backend_size_dynamic_sections \
5735 elf32_bfinfdpic_size_dynamic_sections
5736 #undef elf_backend_finish_dynamic_symbol
5737 #define elf_backend_finish_dynamic_symbol \
5738 elf32_bfinfdpic_finish_dynamic_symbol
5739 #undef elf_backend_finish_dynamic_sections
5740 #define elf_backend_finish_dynamic_sections \
5741 elf32_bfinfdpic_finish_dynamic_sections
5743 #undef elf_backend_discard_info
5744 #define elf_backend_discard_info \
5745 bfinfdpic_elf_discard_info
5746 #undef elf_backend_can_make_relative_eh_frame
5747 #define elf_backend_can_make_relative_eh_frame \
5748 bfinfdpic_elf_use_relative_eh_frame
5749 #undef elf_backend_can_make_lsda_relative_eh_frame
5750 #define elf_backend_can_make_lsda_relative_eh_frame \
5751 bfinfdpic_elf_use_relative_eh_frame
5752 #undef elf_backend_encode_eh_address
5753 #define elf_backend_encode_eh_address \
5754 bfinfdpic_elf_encode_eh_address
5756 #undef elf_backend_may_use_rel_p
5757 #define elf_backend_may_use_rel_p 1
5758 #undef elf_backend_may_use_rela_p
5759 #define elf_backend_may_use_rela_p 1
5760 /* We use REL for dynamic relocations only. */
5761 #undef elf_backend_default_use_rela_p
5762 #define elf_backend_default_use_rela_p 1
5764 #undef elf_backend_omit_section_dynsym
5765 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5767 #include "elf32-target.h"