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)
1601 (*_bfd_error_handler)
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);
1631 (*_bfd_error_handler)
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))
2699 case R_BFIN_GOT17M4:
2702 case R_BFIN_FUNCDESC_GOT17M4:
2703 case R_BFIN_FUNCDESC_GOTHI:
2704 case R_BFIN_FUNCDESC_GOTLO:
2705 case R_BFIN_GOTOFF17M4:
2706 case R_BFIN_GOTOFFHI:
2707 case R_BFIN_GOTOFFLO:
2708 case R_BFIN_FUNCDESC_GOTOFF17M4:
2709 case R_BFIN_FUNCDESC_GOTOFFHI:
2710 case R_BFIN_FUNCDESC_GOTOFFLO:
2711 case R_BFIN_FUNCDESC:
2712 case R_BFIN_FUNCDESC_VALUE:
2714 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2715 (info), input_bfd, h,
2716 orig_addend, INSERT);
2718 /* In order to find the entry we created before, we must
2719 use the original addend, not the one that may have been
2720 modified by _bfd_elf_rela_local_sym(). */
2721 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2722 (info), input_bfd, r_symndx,
2723 orig_addend, INSERT);
2727 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2731 (*_bfd_error_handler)
2732 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2733 input_bfd, input_section, rel->r_offset, name);
2743 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2744 && _bfd_elf_section_offset (output_bfd, info, input_section,
2745 rel->r_offset) != (bfd_vma) -1)
2747 info->callbacks->warning
2748 (info, _("relocation references symbol not defined in the module"),
2749 name, input_bfd, input_section, rel->r_offset);
2757 case R_BFIN_PCREL24:
2758 case R_BFIN_PCREL24_JUMP_L:
2759 check_segment[0] = isec_segment;
2760 if (! IS_FDPIC (output_bfd))
2761 check_segment[1] = isec_segment;
2762 else if (picrel->plt)
2764 relocation = bfinfdpic_plt_section (info)->output_section->vma
2765 + bfinfdpic_plt_section (info)->output_offset
2766 + picrel->plt_entry;
2767 check_segment[1] = plt_segment;
2769 /* We don't want to warn on calls to undefined weak symbols,
2770 as calls to them must be protected by non-NULL tests
2771 anyway, and unprotected calls would invoke undefined
2773 else if (picrel->symndx == -1
2774 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2775 check_segment[1] = check_segment[0];
2777 check_segment[1] = sec
2778 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2782 case R_BFIN_GOT17M4:
2785 relocation = picrel->got_entry;
2786 check_segment[0] = check_segment[1] = got_segment;
2789 case R_BFIN_FUNCDESC_GOT17M4:
2790 case R_BFIN_FUNCDESC_GOTHI:
2791 case R_BFIN_FUNCDESC_GOTLO:
2792 relocation = picrel->fdgot_entry;
2793 check_segment[0] = check_segment[1] = got_segment;
2796 case R_BFIN_GOTOFFHI:
2797 case R_BFIN_GOTOFF17M4:
2798 case R_BFIN_GOTOFFLO:
2799 relocation -= bfinfdpic_got_section (info)->output_section->vma
2800 + bfinfdpic_got_section (info)->output_offset
2801 + bfinfdpic_got_initial_offset (info);
2802 check_segment[0] = got_segment;
2803 check_segment[1] = sec
2804 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2808 case R_BFIN_FUNCDESC_GOTOFF17M4:
2809 case R_BFIN_FUNCDESC_GOTOFFHI:
2810 case R_BFIN_FUNCDESC_GOTOFFLO:
2811 relocation = picrel->fd_entry;
2812 check_segment[0] = check_segment[1] = got_segment;
2815 case R_BFIN_FUNCDESC:
2818 bfd_vma addend = rel->r_addend;
2820 if (! (h && h->root.type == bfd_link_hash_undefweak
2821 && BFINFDPIC_SYM_LOCAL (info, h)))
2823 /* If the symbol is dynamic and there may be dynamic
2824 symbol resolution because we are or are linked with a
2825 shared library, emit a FUNCDESC relocation such that
2826 the dynamic linker will allocate the function
2827 descriptor. If the symbol needs a non-local function
2828 descriptor but binds locally (e.g., its visibility is
2829 protected, emit a dynamic relocation decayed to
2831 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2832 && BFINFDPIC_SYM_LOCAL (info, h)
2833 && !bfd_link_pde (info))
2835 dynindx = elf_section_data (h->root.u.def.section
2836 ->output_section)->dynindx;
2837 addend += h->root.u.def.section->output_offset
2838 + h->root.u.def.value;
2840 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2844 info->callbacks->warning
2845 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2846 name, input_bfd, input_section, rel->r_offset);
2849 dynindx = h->dynindx;
2853 /* Otherwise, we know we have a private function
2854 descriptor, so reference it directly. */
2855 BFD_ASSERT (picrel->privfd);
2856 r_type = R_BFIN_BYTE4_DATA;
2857 dynindx = elf_section_data (bfinfdpic_got_section (info)
2858 ->output_section)->dynindx;
2859 addend = bfinfdpic_got_section (info)->output_offset
2860 + bfinfdpic_got_initial_offset (info)
2864 /* If there is room for dynamic symbol resolution, emit
2865 the dynamic relocation. However, if we're linking an
2866 executable at a fixed location, we won't have emitted a
2867 dynamic symbol entry for the got section, so idx will
2868 be zero, which means we can and should compute the
2869 address of the private descriptor ourselves. */
2870 if (bfd_link_pde (info)
2871 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2875 addend += bfinfdpic_got_section (info)->output_section->vma;
2876 if ((bfd_get_section_flags (output_bfd,
2877 input_section->output_section)
2878 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2880 if (_bfinfdpic_osec_readonly_p (output_bfd,
2884 info->callbacks->warning
2886 _("cannot emit fixups in read-only section"),
2887 name, input_bfd, input_section, rel->r_offset);
2891 offset = _bfd_elf_section_offset
2893 input_section, rel->r_offset);
2895 if (offset != (bfd_vma)-1)
2896 _bfinfdpic_add_rofixup (output_bfd,
2897 bfinfdpic_gotfixup_section
2899 offset + input_section
2900 ->output_section->vma
2901 + input_section->output_offset,
2905 else if ((bfd_get_section_flags (output_bfd,
2906 input_section->output_section)
2907 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2911 if (_bfinfdpic_osec_readonly_p (output_bfd,
2915 info->callbacks->warning
2917 _("cannot emit dynamic relocations in read-only section"),
2918 name, input_bfd, input_section, rel->r_offset);
2921 offset = _bfd_elf_section_offset (output_bfd, info,
2922 input_section, rel->r_offset);
2924 if (offset != (bfd_vma)-1)
2925 _bfinfdpic_add_dyn_reloc (output_bfd,
2926 bfinfdpic_gotrel_section (info),
2927 offset + input_section
2928 ->output_section->vma
2929 + input_section->output_offset,
2931 dynindx, addend, picrel);
2934 addend += bfinfdpic_got_section (info)->output_section->vma;
2937 /* We want the addend in-place because dynamic
2938 relocations are REL. Setting relocation to it should
2939 arrange for it to be installed. */
2940 relocation = addend - rel->r_addend;
2942 check_segment[0] = check_segment[1] = got_segment;
2945 case R_BFIN_BYTE4_DATA:
2946 if (! IS_FDPIC (output_bfd))
2948 check_segment[0] = check_segment[1] = -1;
2952 case R_BFIN_FUNCDESC_VALUE:
2955 bfd_vma addend = rel->r_addend;
2957 offset = _bfd_elf_section_offset (output_bfd, info,
2958 input_section, rel->r_offset);
2960 /* If the symbol is dynamic but binds locally, use
2962 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2964 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2966 info->callbacks->warning
2967 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2968 name, input_bfd, input_section, rel->r_offset);
2971 dynindx = h->dynindx;
2976 addend += h->root.u.def.value;
2978 addend += sym->st_value;
2980 addend += osec->output_offset;
2981 if (osec && osec->output_section
2982 && ! bfd_is_abs_section (osec->output_section)
2983 && ! bfd_is_und_section (osec->output_section))
2984 dynindx = elf_section_data (osec->output_section)->dynindx;
2989 /* If we're linking an executable at a fixed address, we
2990 can omit the dynamic relocation as long as the symbol
2991 is defined in the current link unit (which is implied
2992 by its output section not being NULL). */
2993 if (bfd_link_pde (info)
2994 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2997 addend += osec->output_section->vma;
2998 if (IS_FDPIC (input_bfd)
2999 && (bfd_get_section_flags (output_bfd,
3000 input_section->output_section)
3001 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3003 if (_bfinfdpic_osec_readonly_p (output_bfd,
3007 info->callbacks->warning
3009 _("cannot emit fixups in read-only section"),
3010 name, input_bfd, input_section, rel->r_offset);
3013 if (!h || h->root.type != bfd_link_hash_undefweak)
3015 if (offset != (bfd_vma)-1)
3017 _bfinfdpic_add_rofixup (output_bfd,
3018 bfinfdpic_gotfixup_section
3020 offset + input_section
3021 ->output_section->vma
3022 + input_section->output_offset,
3025 if (r_type == R_BFIN_FUNCDESC_VALUE)
3026 _bfinfdpic_add_rofixup
3028 bfinfdpic_gotfixup_section (info),
3029 offset + input_section->output_section->vma
3030 + input_section->output_offset + 4, picrel);
3037 if ((bfd_get_section_flags (output_bfd,
3038 input_section->output_section)
3039 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3041 if (_bfinfdpic_osec_readonly_p (output_bfd,
3045 info->callbacks->warning
3047 _("cannot emit dynamic relocations in read-only section"),
3048 name, input_bfd, input_section, rel->r_offset);
3052 if (offset != (bfd_vma)-1)
3053 _bfinfdpic_add_dyn_reloc (output_bfd,
3054 bfinfdpic_gotrel_section (info),
3056 + input_section->output_section->vma
3057 + input_section->output_offset,
3058 r_type, dynindx, addend, picrel);
3061 addend += osec->output_section->vma;
3062 /* We want the addend in-place because dynamic
3063 relocations are REL. Setting relocation to it
3064 should arrange for it to be installed. */
3065 relocation = addend - rel->r_addend;
3068 if (r_type == R_BFIN_FUNCDESC_VALUE)
3070 /* If we've omitted the dynamic relocation, just emit
3071 the fixed addresses of the symbol and of the local
3073 if (bfd_link_pde (info)
3074 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3075 bfd_put_32 (output_bfd,
3076 bfinfdpic_got_section (info)->output_section->vma
3077 + bfinfdpic_got_section (info)->output_offset
3078 + bfinfdpic_got_initial_offset (info),
3079 contents + rel->r_offset + 4);
3081 /* A function descriptor used for lazy or local
3082 resolving is initialized such that its high word
3083 contains the output section index in which the
3084 PLT entries are located, and the low word
3085 contains the offset of the lazy PLT entry entry
3086 point into that section. */
3087 bfd_put_32 (output_bfd,
3088 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3090 : _bfinfdpic_osec_to_segment (output_bfd,
3093 contents + rel->r_offset + 4);
3096 check_segment[0] = check_segment[1] = got_segment;
3100 check_segment[0] = isec_segment;
3101 check_segment[1] = sec
3102 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3107 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3109 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3110 in the ld testsuite. */
3111 /* This helps catch problems in GCC while we can't do more
3112 than static linking. The idea is to test whether the
3113 input file basename is crt0.o only once. */
3114 if (silence_segment_error == 1)
3115 silence_segment_error =
3116 (strlen (input_bfd->filename) == 6
3117 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3118 || (strlen (input_bfd->filename) > 6
3119 && filename_cmp (input_bfd->filename
3120 + strlen (input_bfd->filename) - 7,
3124 if (!silence_segment_error
3125 /* We don't want duplicate errors for undefined
3127 && !(picrel && picrel->symndx == -1
3128 && picrel->d.h->root.type == bfd_link_hash_undefined))
3129 info->callbacks->warning
3132 ? _("relocations between different segments are not supported")
3133 : _("warning: relocation references a different segment"),
3134 name, input_bfd, input_section, rel->r_offset);
3135 if (!silence_segment_error && bfd_link_pic (info))
3137 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3142 case R_BFIN_GOTOFFHI:
3143 /* We need the addend to be applied before we shift the
3145 relocation += rel->r_addend;
3148 case R_BFIN_FUNCDESC_GOTHI:
3149 case R_BFIN_FUNCDESC_GOTOFFHI:
3154 case R_BFIN_FUNCDESC_GOTLO:
3155 case R_BFIN_GOTOFFLO:
3156 case R_BFIN_FUNCDESC_GOTOFFLO:
3157 relocation &= 0xffff;
3166 case R_BFIN_PCREL24:
3167 case R_BFIN_PCREL24_JUMP_L:
3168 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3172 /* When referencing a GOT entry, a function descriptor or a
3173 PLT, we don't want the addend to apply to the reference,
3174 but rather to the referenced symbol. The actual entry
3175 will have already been created taking the addend into
3176 account, so cancel it out here. */
3177 case R_BFIN_GOT17M4:
3180 case R_BFIN_FUNCDESC_GOT17M4:
3181 case R_BFIN_FUNCDESC_GOTHI:
3182 case R_BFIN_FUNCDESC_GOTLO:
3183 case R_BFIN_FUNCDESC_GOTOFF17M4:
3184 case R_BFIN_FUNCDESC_GOTOFFHI:
3185 case R_BFIN_FUNCDESC_GOTOFFLO:
3186 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3187 here, since we do want to apply the addend to the others.
3188 Note that we've applied the addend to GOTOFFHI before we
3189 shifted it right. */
3190 case R_BFIN_GOTOFFHI:
3191 relocation -= rel->r_addend;
3198 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3199 contents, rel->r_offset,
3200 relocation, rel->r_addend);
3202 if (r != bfd_reloc_ok)
3204 const char * msg = (const char *) NULL;
3208 case bfd_reloc_overflow:
3209 (*info->callbacks->reloc_overflow)
3210 (info, (h ? &h->root : NULL), name, howto->name,
3211 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3214 case bfd_reloc_undefined:
3215 (*info->callbacks->undefined_symbol)
3216 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3219 case bfd_reloc_outofrange:
3220 msg = _("internal error: out of range error");
3223 case bfd_reloc_notsupported:
3224 msg = _("internal error: unsupported relocation error");
3227 case bfd_reloc_dangerous:
3228 msg = _("internal error: dangerous relocation");
3232 msg = _("internal error: unknown error");
3237 (*info->callbacks->warning) (info, msg, name, input_bfd,
3238 input_section, rel->r_offset);
3245 /* Update the relocation information for the relocations of the section
3249 bfinfdpic_gc_sweep_hook (bfd *abfd,
3250 struct bfd_link_info *info,
3252 const Elf_Internal_Rela *relocs)
3254 Elf_Internal_Shdr *symtab_hdr;
3255 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3256 const Elf_Internal_Rela *rel;
3257 const Elf_Internal_Rela *rel_end;
3258 struct bfinfdpic_relocs_info *picrel;
3260 BFD_ASSERT (IS_FDPIC (abfd));
3262 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3263 sym_hashes = elf_sym_hashes (abfd);
3264 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3265 if (!elf_bad_symtab (abfd))
3266 sym_hashes_end -= symtab_hdr->sh_info;
3268 rel_end = relocs + sec->reloc_count;
3269 for (rel = relocs; rel < rel_end; rel++)
3271 struct elf_link_hash_entry *h;
3272 unsigned long r_symndx;
3274 r_symndx = ELF32_R_SYM (rel->r_info);
3275 if (r_symndx < symtab_hdr->sh_info)
3278 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3281 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3283 rel->r_addend, NO_INSERT);
3285 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3286 (info), abfd, r_symndx,
3287 rel->r_addend, NO_INSERT);
3292 switch (ELF32_R_TYPE (rel->r_info))
3294 case R_BFIN_PCREL24:
3295 case R_BFIN_PCREL24_JUMP_L:
3299 case R_BFIN_FUNCDESC_VALUE:
3300 picrel->relocsfdv--;
3301 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3305 case R_BFIN_BYTE4_DATA:
3307 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3311 case R_BFIN_GOT17M4:
3320 case R_BFIN_FUNCDESC_GOT17M4:
3321 picrel->fdgot17m4--;
3324 case R_BFIN_FUNCDESC_GOTHI:
3325 case R_BFIN_FUNCDESC_GOTLO:
3326 picrel->fdgothilo--;
3329 case R_BFIN_GOTOFF17M4:
3330 case R_BFIN_GOTOFFHI:
3331 case R_BFIN_GOTOFFLO:
3335 case R_BFIN_FUNCDESC_GOTOFF17M4:
3336 picrel->fdgoff17m4--;
3339 case R_BFIN_FUNCDESC_GOTOFFHI:
3340 case R_BFIN_FUNCDESC_GOTOFFLO:
3341 picrel->fdgoffhilo--;
3344 case R_BFIN_FUNCDESC:
3357 /* We need dynamic symbols for every section, since segments can
3358 relocate independently. */
3360 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3361 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3364 switch (elf_section_data (p)->this_hdr.sh_type)
3368 /* If sh_type is yet undecided, assume it could be
3369 SHT_PROGBITS/SHT_NOBITS. */
3373 /* There shouldn't be section relative relocations
3374 against any other section. */
3380 /* Create a .got section, as well as its additional info field. This
3381 is almost entirely copied from
3382 elflink.c:_bfd_elf_create_got_section(). */
3385 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3387 flagword flags, pltflags;
3389 struct elf_link_hash_entry *h;
3390 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3393 /* This function may be called more than once. */
3394 s = bfd_get_linker_section (abfd, ".got");
3398 /* Machine specific: although pointers are 32-bits wide, we want the
3399 GOT to be aligned to a 64-bit boundary, such that function
3400 descriptors in it can be accessed with 64-bit loads and
3404 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3405 | SEC_LINKER_CREATED);
3408 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3410 || !bfd_set_section_alignment (abfd, s, ptralign))
3413 if (bed->want_got_plt)
3415 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
3417 || !bfd_set_section_alignment (abfd, s, ptralign))
3421 if (bed->want_got_sym)
3423 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3424 (or .got.plt) section. We don't do this in the linker script
3425 because we don't want to define the symbol if we are not creating
3426 a global offset table. */
3427 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3428 elf_hash_table (info)->hgot = h;
3432 /* Machine-specific: we want the symbol for executables as
3434 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3438 /* The first bit of the global offset table is the header. */
3439 s->size += bed->got_header_size;
3441 /* This is the machine-specific part. Create and initialize section
3442 data for the got. */
3443 if (IS_FDPIC (abfd))
3445 bfinfdpic_got_section (info) = s;
3446 bfinfdpic_relocs_info (info) = htab_try_create (1,
3447 bfinfdpic_relocs_info_hash,
3448 bfinfdpic_relocs_info_eq,
3450 if (! bfinfdpic_relocs_info (info))
3453 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3454 (flags | SEC_READONLY));
3456 || ! bfd_set_section_alignment (abfd, s, 2))
3459 bfinfdpic_gotrel_section (info) = s;
3461 /* Machine-specific. */
3462 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3463 (flags | SEC_READONLY));
3465 || ! bfd_set_section_alignment (abfd, s, 2))
3468 bfinfdpic_gotfixup_section (info) = s;
3471 pltflags |= SEC_CODE;
3472 if (bed->plt_not_loaded)
3473 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3474 if (bed->plt_readonly)
3475 pltflags |= SEC_READONLY;
3477 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3479 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3481 /* Blackfin-specific: remember it. */
3482 bfinfdpic_plt_section (info) = s;
3484 if (bed->want_plt_sym)
3486 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3488 struct bfd_link_hash_entry *bh = NULL;
3490 if (! (_bfd_generic_link_add_one_symbol
3491 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3492 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3494 h = (struct elf_link_hash_entry *) bh;
3496 h->type = STT_OBJECT;
3498 if (! bfd_link_executable (info)
3499 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3503 /* Blackfin-specific: we want rel relocations for the plt. */
3504 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3505 flags | SEC_READONLY);
3507 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3509 /* Blackfin-specific: remember it. */
3510 bfinfdpic_pltrel_section (info) = s;
3515 /* Make sure the got and plt sections exist, and that our pointers in
3516 the link hash table point to them. */
3519 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3521 /* This is mostly copied from
3522 elflink.c:_bfd_elf_create_dynamic_sections(). */
3525 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3527 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3528 | SEC_LINKER_CREATED);
3530 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3531 .rel[a].bss sections. */
3533 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3534 if (! _bfin_create_got_section (abfd, info))
3537 /* Blackfin-specific: make sure we created everything we wanted. */
3538 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3539 /* && bfinfdpic_gotfixup_section (info) */
3540 && bfinfdpic_plt_section (info)
3541 && bfinfdpic_pltrel_section (info));
3543 if (bed->want_dynbss)
3545 /* The .dynbss section is a place to put symbols which are defined
3546 by dynamic objects, are referenced by regular objects, and are
3547 not functions. We must allocate space for them in the process
3548 image and use a R_*_COPY reloc to tell the dynamic linker to
3549 initialize them at run time. The linker script puts the .dynbss
3550 section into the .bss section of the final image. */
3551 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3552 SEC_ALLOC | SEC_LINKER_CREATED);
3556 /* The .rel[a].bss section holds copy relocs. This section is not
3557 normally needed. We need to create it here, though, so that the
3558 linker will map it to an output section. We can't just create it
3559 only if we need it, because we will not know whether we need it
3560 until we have seen all the input files, and the first time the
3561 main linker code calls BFD after examining all the input files
3562 (size_dynamic_sections) the input sections have already been
3563 mapped to the output sections. If the section turns out not to
3564 be needed, we can discard it later. We will never need this
3565 section when generating a shared object, since they do not use
3567 if (! bfd_link_pic (info))
3569 s = bfd_make_section_anyway_with_flags (abfd,
3571 flags | SEC_READONLY);
3573 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3581 /* Compute the total GOT size required by each symbol in each range.
3582 Symbols may require up to 4 words in the GOT: an entry pointing to
3583 the symbol, an entry pointing to its function descriptor, and a
3584 private function descriptors taking two words. */
3587 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3588 struct _bfinfdpic_dynamic_got_info *dinfo)
3590 /* Allocate space for a GOT entry pointing to the symbol. */
3592 dinfo->got17m4 += 4;
3593 else if (entry->gothilo)
3594 dinfo->gothilo += 4;
3599 /* Allocate space for a GOT entry pointing to the function
3601 if (entry->fdgot17m4)
3602 dinfo->got17m4 += 4;
3603 else if (entry->fdgothilo)
3604 dinfo->gothilo += 4;
3609 /* Decide whether we need a PLT entry, a function descriptor in the
3610 GOT, and a lazy PLT entry for this symbol. */
3611 entry->plt = entry->call
3612 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3613 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3614 entry->privfd = entry->plt
3615 || entry->fdgoff17m4 || entry->fdgoffhilo
3616 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3617 && (entry->symndx != -1
3618 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3619 entry->lazyplt = entry->privfd
3620 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3621 && ! (dinfo->info->flags & DF_BIND_NOW)
3622 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3624 /* Allocate space for a function descriptor. */
3625 if (entry->fdgoff17m4)
3627 else if (entry->privfd && entry->plt)
3629 else if (entry->privfd)
3636 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3639 /* Compute the number of dynamic relocations and fixups that a symbol
3640 requires, and add (or subtract) from the grand and per-symbol
3644 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3645 struct _bfinfdpic_dynamic_got_info *dinfo,
3646 bfd_boolean subtract)
3648 bfd_vma relocs = 0, fixups = 0;
3650 if (!bfd_link_pde (dinfo->info))
3651 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3654 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3656 if (entry->symndx != -1
3657 || entry->d.h->root.type != bfd_link_hash_undefweak)
3658 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3661 relocs += entry->relocs32 + entry->relocsfdv;
3663 if (entry->symndx != -1
3664 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3666 if (entry->symndx != -1
3667 || entry->d.h->root.type != bfd_link_hash_undefweak)
3668 fixups += entry->relocsfd;
3671 relocs += entry->relocsfd;
3680 entry->dynrelocs += relocs;
3681 entry->fixups += fixups;
3682 dinfo->relocs += relocs;
3683 dinfo->fixups += fixups;
3686 /* Compute the total GOT and PLT size required by each symbol in each range. *
3687 Symbols may require up to 4 words in the GOT: an entry pointing to
3688 the symbol, an entry pointing to its function descriptor, and a
3689 private function descriptors taking two words. */
3692 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3694 struct bfinfdpic_relocs_info *entry = *entryp;
3695 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3697 _bfinfdpic_count_nontls_entries (entry, dinfo);
3699 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3704 /* This structure is used to assign offsets to got entries, function
3705 descriptors, plt entries and lazy plt entries. */
3707 struct _bfinfdpic_dynamic_got_plt_info
3709 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3710 struct _bfinfdpic_dynamic_got_info g;
3712 /* For each addressable range, we record a MAX (positive) and MIN
3713 (negative) value. CUR is used to assign got entries, and it's
3714 incremented from an initial positive value to MAX, then from MIN
3715 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3716 assign function descriptors, and it's decreased from an initial
3717 non-positive value to MIN, then from MAX down to CUR (unless CUR
3718 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3719 to even words. ODD, if non-zero, indicates an odd word to be
3720 used for the next got entry, otherwise CUR is used and
3721 incremented by a pair of words, wrapping around when it reaches
3722 MAX. FDCUR is decremented (and wrapped) before the next function
3723 descriptor is chosen. FDPLT indicates the number of remaining
3724 slots that can be used for function descriptors used only by PLT
3726 struct _bfinfdpic_dynamic_got_alloc_data
3728 bfd_signed_vma max, cur, odd, fdcur, min;
3733 /* Determine the positive and negative ranges to be used by each
3734 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3735 double-word boundary, are the minimum (negative) and maximum
3736 (positive) GOT offsets already used by previous ranges, except for
3737 an ODD entry that may have been left behind. GOT and FD indicate
3738 the size of GOT entries and function descriptors that must be
3739 placed within the range from -WRAP to WRAP. If there's room left,
3740 up to FDPLT bytes should be reserved for additional function
3743 inline static bfd_signed_vma
3744 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3745 bfd_signed_vma fdcur,
3753 bfd_signed_vma wrapmin = -wrap;
3755 /* Start at the given initial points. */
3759 /* If we had an incoming odd word and we have any got entries that
3760 are going to use it, consume it, otherwise leave gad->odd at
3761 zero. We might force gad->odd to zero and return the incoming
3762 odd such that it is used by the next range, but then GOT entries
3763 might appear to be out of order and we wouldn't be able to
3764 shorten the GOT by one word if it turns out to end with an
3765 unpaired GOT entry. */
3775 /* If we're left with an unpaired GOT entry, compute its location
3776 such that we can return it. Otherwise, if got doesn't require an
3777 odd number of words here, either odd was already zero in the
3778 block above, or it was set to zero because got was non-zero, or
3779 got was already zero. In the latter case, we want the value of
3780 odd to carry over to the return statement, so we don't want to
3781 reset odd unless the condition below is true. */
3788 /* Compute the tentative boundaries of this range. */
3789 gad->max = cur + got;
3790 gad->min = fdcur - fd;
3793 /* If function descriptors took too much space, wrap some of them
3795 if (gad->min < wrapmin)
3797 gad->max += wrapmin - gad->min;
3800 /* If there is space left and we have function descriptors
3801 referenced in PLT entries that could take advantage of shorter
3802 offsets, place them here. */
3803 else if (fdplt && gad->min > wrapmin)
3806 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3807 fds = gad->min - wrapmin;
3816 /* If GOT entries took too much space, wrap some of them around.
3817 This may well cause gad->min to become lower than wrapmin. This
3818 will cause a relocation overflow later on, so we don't have to
3820 if ((bfd_vma) gad->max > wrap)
3822 gad->min -= gad->max - wrap;
3825 /* If there is more space left, try to place some more function
3826 descriptors for PLT entries. */
3827 else if (fdplt && (bfd_vma) gad->max < wrap)
3830 if ((bfd_vma) (wrap - gad->max) < fdplt)
3831 fds = wrap - gad->max;
3840 /* If odd was initially computed as an offset past the wrap point,
3843 odd = gad->min + odd - gad->max;
3845 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3846 before returning, so do it here too. This guarantees that,
3847 should cur and fdcur meet at the wrap point, they'll both be
3849 if (gad->cur == gad->max)
3850 gad->cur = gad->min;
3855 /* Compute the location of the next GOT entry, given the allocation
3856 data for a range. */
3858 inline static bfd_signed_vma
3859 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3865 /* If there was an odd word left behind, use it. */
3871 /* Otherwise, use the word pointed to by cur, reserve the next
3872 as an odd word, and skip to the next pair of words, possibly
3875 gad->odd = gad->cur + 4;
3877 if (gad->cur == gad->max)
3878 gad->cur = gad->min;
3884 /* Compute the location of the next function descriptor entry in the
3885 GOT, given the allocation data for a range. */
3887 inline static bfd_signed_vma
3888 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3890 /* If we're at the bottom, wrap around, and only then allocate the
3891 next pair of words. */
3892 if (gad->fdcur == gad->min)
3893 gad->fdcur = gad->max;
3894 return gad->fdcur -= 8;
3897 /* Assign GOT offsets for every GOT entry and function descriptor.
3898 Doing everything in a single pass is tricky. */
3901 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3903 struct bfinfdpic_relocs_info *entry = *entryp;
3904 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3907 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3908 else if (entry->gothilo)
3909 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3911 if (entry->fdgot17m4)
3912 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3913 else if (entry->fdgothilo)
3914 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3916 if (entry->fdgoff17m4)
3917 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3918 else if (entry->plt && dinfo->got17m4.fdplt)
3920 dinfo->got17m4.fdplt -= 8;
3921 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3923 else if (entry->plt)
3925 dinfo->gothilo.fdplt -= 8;
3926 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3928 else if (entry->privfd)
3929 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3934 /* Assign GOT offsets to private function descriptors used by PLT
3935 entries (or referenced by 32-bit offsets), as well as PLT entries
3936 and lazy PLT entries. */
3939 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3941 struct bfinfdpic_relocs_info *entry = *entryp;
3942 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3944 /* If this symbol requires a local function descriptor, allocate
3946 if (entry->privfd && entry->fd_entry == 0)
3948 if (dinfo->got17m4.fdplt)
3950 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3951 dinfo->got17m4.fdplt -= 8;
3955 BFD_ASSERT (dinfo->gothilo.fdplt);
3956 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3957 dinfo->gothilo.fdplt -= 8;
3965 /* We use the section's raw size to mark the location of the
3967 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3969 /* Figure out the length of this PLT entry based on the
3970 addressing mode we need to reach the function descriptor. */
3971 BFD_ASSERT (entry->fd_entry);
3972 if (entry->fd_entry >= -(1 << (18 - 1))
3973 && entry->fd_entry + 4 < (1 << (18 - 1)))
3978 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3983 entry->lzplt_entry = dinfo->g.lzplt;
3984 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3985 /* If this entry is the one that gets the resolver stub, account
3986 for the additional instruction. */
3987 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3988 == BFINFDPIC_LZPLT_RESOLV_LOC)
3989 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3995 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3996 _bfinfdpic_assign_plt_entries. */
3999 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
4001 struct bfinfdpic_relocs_info *entry = *entryp;
4003 entry->got_entry = 0;
4004 entry->fdgot_entry = 0;
4005 entry->fd_entry = 0;
4006 entry->plt_entry = (bfd_vma)-1;
4007 entry->lzplt_entry = (bfd_vma)-1;
4012 /* Follow indirect and warning hash entries so that each got entry
4013 points to the final symbol definition. P must point to a pointer
4014 to the hash table we're traversing. Since this traversal may
4015 modify the hash table, we set this pointer to NULL to indicate
4016 we've made a potentially-destructive change to the hash table, so
4017 the traversal must be restarted. */
4019 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4021 struct bfinfdpic_relocs_info *entry = *entryp;
4024 if (entry->symndx == -1)
4026 struct elf_link_hash_entry *h = entry->d.h;
4027 struct bfinfdpic_relocs_info *oentry;
4029 while (h->root.type == bfd_link_hash_indirect
4030 || h->root.type == bfd_link_hash_warning)
4031 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4033 if (entry->d.h == h)
4036 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4041 /* Merge the two entries. */
4042 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4043 htab_clear_slot (*htab, entryp);
4049 /* If we can't find this entry with the new bfd hash, re-insert
4050 it, and get the traversal restarted. */
4051 if (! htab_find (*htab, entry))
4053 htab_clear_slot (*htab, entryp);
4054 entryp = htab_find_slot (*htab, entry, INSERT);
4057 /* Abort the traversal, since the whole table may have
4058 moved, and leave it up to the parent to restart the
4060 *(htab_t *)p = NULL;
4068 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4069 section and the rofixup section. Assign locations for GOT and PLT
4073 _bfinfdpic_size_got_plt (bfd *output_bfd,
4074 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4078 struct bfd_link_info *info = gpinfop->g.info;
4079 bfd *dynobj = elf_hash_table (info)->dynobj;
4081 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4082 sizeof (gpinfop->g));
4085 /* Compute the total size taken by entries in the 18-bit range,
4086 to tell how many PLT function descriptors we can bring into it
4087 without causing it to overflow. */
4088 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4089 if (limit < (bfd_vma)1 << 18)
4090 limit = ((bfd_vma)1 << 18) - limit;
4093 if (gpinfop->g.fdplt < limit)
4094 limit = gpinfop->g.fdplt;
4096 /* Determine the ranges of GOT offsets that we can use for each
4097 range of addressing modes. */
4098 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4105 (bfd_vma)1 << (18-1));
4106 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4107 gpinfop->got17m4.min,
4109 gpinfop->got17m4.max,
4112 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4113 (bfd_vma)1 << (32-1));
4115 /* Now assign (most) GOT offsets. */
4116 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4119 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4120 - gpinfop->gothilo.min
4121 /* If an odd word is the last word of the GOT, we don't need this
4122 word to be part of the GOT. */
4123 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4124 if (bfinfdpic_got_section (info)->size == 0)
4125 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4126 else if (bfinfdpic_got_section (info)->size == 12
4127 && ! elf_hash_table (info)->dynamic_sections_created)
4129 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4130 bfinfdpic_got_section (info)->size = 0;
4134 bfinfdpic_got_section (info)->contents =
4135 (bfd_byte *) bfd_zalloc (dynobj,
4136 bfinfdpic_got_section (info)->size);
4137 if (bfinfdpic_got_section (info)->contents == NULL)
4141 if (elf_hash_table (info)->dynamic_sections_created)
4142 /* Subtract the number of lzplt entries, since those will generate
4143 relocations in the pltrel section. */
4144 bfinfdpic_gotrel_section (info)->size =
4145 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4146 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4148 BFD_ASSERT (gpinfop->g.relocs == 0);
4149 if (bfinfdpic_gotrel_section (info)->size == 0)
4150 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4153 bfinfdpic_gotrel_section (info)->contents =
4154 (bfd_byte *) bfd_zalloc (dynobj,
4155 bfinfdpic_gotrel_section (info)->size);
4156 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4160 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4161 if (bfinfdpic_gotfixup_section (info)->size == 0)
4162 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4165 bfinfdpic_gotfixup_section (info)->contents =
4166 (bfd_byte *) bfd_zalloc (dynobj,
4167 bfinfdpic_gotfixup_section (info)->size);
4168 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4172 if (elf_hash_table (info)->dynamic_sections_created)
4173 bfinfdpic_pltrel_section (info)->size =
4174 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4175 if (bfinfdpic_pltrel_section (info)->size == 0)
4176 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4179 bfinfdpic_pltrel_section (info)->contents =
4180 (bfd_byte *) bfd_zalloc (dynobj,
4181 bfinfdpic_pltrel_section (info)->size);
4182 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4186 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4187 such that there's room for the additional instruction needed to
4188 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4189 account for them, our block size is 4 bytes smaller than the real
4191 if (elf_hash_table (info)->dynamic_sections_created)
4193 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4194 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4195 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4198 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4199 actually assign lazy PLT entries addresses. */
4200 gpinfop->g.lzplt = 0;
4202 /* Save information that we're going to need to generate GOT and PLT
4204 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4206 if (get_elf_backend_data (output_bfd)->want_got_sym)
4207 elf_hash_table (info)->hgot->root.u.def.value
4208 = bfinfdpic_got_initial_offset (info);
4210 if (elf_hash_table (info)->dynamic_sections_created)
4211 bfinfdpic_plt_initial_offset (info) =
4212 bfinfdpic_plt_section (info)->size;
4214 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4217 /* Allocate the PLT section contents only after
4218 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4219 non-lazy PLT entries. */
4220 if (bfinfdpic_plt_section (info)->size == 0)
4221 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4224 bfinfdpic_plt_section (info)->contents =
4225 (bfd_byte *) bfd_zalloc (dynobj,
4226 bfinfdpic_plt_section (info)->size);
4227 if (bfinfdpic_plt_section (info)->contents == NULL)
4234 /* Set the sizes of the dynamic sections. */
4237 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4238 struct bfd_link_info *info)
4240 struct elf_link_hash_table *htab;
4243 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4245 htab = elf_hash_table (info);
4246 dynobj = htab->dynobj;
4247 BFD_ASSERT (dynobj != NULL);
4249 if (htab->dynamic_sections_created)
4251 /* Set the contents of the .interp section to the interpreter. */
4252 if (bfd_link_executable (info) && !info->nointerp)
4254 s = bfd_get_linker_section (dynobj, ".interp");
4255 BFD_ASSERT (s != NULL);
4256 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4257 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4261 memset (&gpinfo, 0, sizeof (gpinfo));
4262 gpinfo.g.info = info;
4266 htab_t relocs = bfinfdpic_relocs_info (info);
4268 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4270 if (relocs == bfinfdpic_relocs_info (info))
4274 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4277 /* Allocate space to save the summary information, we're going to
4278 use it if we're doing relaxations. */
4279 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4281 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4284 if (elf_hash_table (info)->dynamic_sections_created)
4286 if (bfinfdpic_got_section (info)->size)
4287 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4290 if (bfinfdpic_pltrel_section (info)->size)
4291 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4292 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4293 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4296 if (bfinfdpic_gotrel_section (info)->size)
4297 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4298 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4299 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4300 sizeof (Elf32_External_Rel)))
4304 s = bfd_get_linker_section (dynobj, ".dynbss");
4305 if (s && s->size == 0)
4306 s->flags |= SEC_EXCLUDE;
4308 s = bfd_get_linker_section (dynobj, ".rela.bss");
4309 if (s && s->size == 0)
4310 s->flags |= SEC_EXCLUDE;
4316 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4317 struct bfd_link_info *info)
4319 if (!bfd_link_relocatable (info)
4320 && !bfd_elf_stack_segment_size (output_bfd, info,
4321 "__stacksize", DEFAULT_STACK_SIZE))
4327 /* Check whether any of the relocations was optimized away, and
4328 subtract it from the relocation or fixup count. */
4330 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4331 struct bfd_link_info *info,
4332 bfd_boolean *changed)
4334 Elf_Internal_Shdr *symtab_hdr;
4335 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4336 Elf_Internal_Rela *rel, *erel;
4338 if ((sec->flags & SEC_RELOC) == 0
4339 || sec->reloc_count == 0)
4342 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4343 sym_hashes = elf_sym_hashes (abfd);
4344 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4345 if (!elf_bad_symtab (abfd))
4346 sym_hashes_end -= symtab_hdr->sh_info;
4348 rel = elf_section_data (sec)->relocs;
4350 /* Now examine each relocation. */
4351 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4353 struct elf_link_hash_entry *h;
4354 unsigned long r_symndx;
4355 struct bfinfdpic_relocs_info *picrel;
4356 struct _bfinfdpic_dynamic_got_info *dinfo;
4358 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4359 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4362 if (_bfd_elf_section_offset (sec->output_section->owner,
4363 info, sec, rel->r_offset)
4367 r_symndx = ELF32_R_SYM (rel->r_info);
4368 if (r_symndx < symtab_hdr->sh_info)
4372 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4373 while (h->root.type == bfd_link_hash_indirect
4374 || h->root.type == bfd_link_hash_warning)
4375 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4379 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4381 rel->r_addend, NO_INSERT);
4383 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4385 rel->r_addend, NO_INSERT);
4391 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4393 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4394 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4396 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4398 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4405 bfinfdpic_elf_discard_info (bfd *ibfd,
4406 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4407 struct bfd_link_info *info)
4409 bfd_boolean changed = FALSE;
4413 /* Account for relaxation of .eh_frame section. */
4414 for (s = ibfd->sections; s; s = s->next)
4415 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4417 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4419 obfd = s->output_section->owner;
4424 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4426 memset (&gpinfo, 0, sizeof (gpinfo));
4427 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4430 /* Clear GOT and PLT assignments. */
4431 htab_traverse (bfinfdpic_relocs_info (info),
4432 _bfinfdpic_reset_got_plt_entries,
4435 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4443 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4444 struct bfd_link_info *info)
4449 dynobj = elf_hash_table (info)->dynobj;
4451 if (bfinfdpic_got_section (info))
4453 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4454 /* PR 17334: It appears that the GOT section can end up
4455 being bigger than the number of relocs. Presumably
4456 because some relocs have been deleted. A test case has
4457 yet to be generated for verify this, but in the meantime
4458 the test below has been changed from == to >= so that
4459 applications can continue to be built. */
4460 >= (bfinfdpic_gotrel_section (info)->reloc_count
4461 * sizeof (Elf32_External_Rel)));
4463 if (bfinfdpic_gotfixup_section (info))
4465 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4466 bfd_vma got_value = hgot->root.u.def.value
4467 + hgot->root.u.def.section->output_section->vma
4468 + hgot->root.u.def.section->output_offset;
4470 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4473 if (bfinfdpic_gotfixup_section (info)->size
4474 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4476 (*_bfd_error_handler)
4477 ("LINKER BUG: .rofixup section size mismatch");
4482 if (elf_hash_table (info)->dynamic_sections_created)
4484 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4485 == (bfinfdpic_pltrel_section (info)->reloc_count
4486 * sizeof (Elf32_External_Rel)));
4489 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4491 if (elf_hash_table (info)->dynamic_sections_created)
4493 Elf32_External_Dyn * dyncon;
4494 Elf32_External_Dyn * dynconend;
4496 BFD_ASSERT (sdyn != NULL);
4498 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4499 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4501 for (; dyncon < dynconend; dyncon++)
4503 Elf_Internal_Dyn dyn;
4505 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4513 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4514 + bfinfdpic_got_section (info)->output_offset
4515 + bfinfdpic_got_initial_offset (info);
4516 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4520 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4521 ->output_section->vma
4522 + bfinfdpic_pltrel_section (info)->output_offset;
4523 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4527 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4528 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4537 /* Adjust a symbol defined by a dynamic object and referenced by a
4541 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info,
4542 struct elf_link_hash_entry *h)
4546 dynobj = elf_hash_table (info)->dynobj;
4548 /* Make sure we know what is going on here. */
4549 BFD_ASSERT (dynobj != NULL
4550 && (h->u.weakdef != NULL
4553 && !h->def_regular)));
4555 /* If this is a weak symbol, and there is a real definition, the
4556 processor independent code will have arranged for us to see the
4557 real definition first, and we can just use the same value. */
4558 if (h->u.weakdef != NULL)
4560 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4561 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4562 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4563 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4569 /* Perform any actions needed for dynamic symbols. */
4572 elf32_bfinfdpic_finish_dynamic_symbol
4573 (bfd *output_bfd ATTRIBUTE_UNUSED,
4574 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4575 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4576 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4581 /* Decide whether to attempt to turn absptr or lsda encodings in
4582 shared libraries into pcrel within the given input section. */
4585 bfinfdpic_elf_use_relative_eh_frame
4586 (bfd *input_bfd ATTRIBUTE_UNUSED,
4587 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4588 asection *eh_frame_section ATTRIBUTE_UNUSED)
4590 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4594 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4597 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4598 struct bfd_link_info *info,
4599 asection *osec, bfd_vma offset,
4600 asection *loc_sec, bfd_vma loc_offset,
4603 struct elf_link_hash_entry *h;
4605 h = elf_hash_table (info)->hgot;
4606 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4608 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4609 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4610 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4611 loc_sec, loc_offset, encoded);
4613 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4614 == (_bfinfdpic_osec_to_segment
4615 (abfd, h->root.u.def.section->output_section)));
4617 *encoded = osec->vma + offset
4618 - (h->root.u.def.value
4619 + h->root.u.def.section->output_section->vma
4620 + h->root.u.def.section->output_offset);
4622 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4627 /* Look through the relocs for a section during the first phase.
4629 Besides handling virtual table relocs for gc, we have to deal with
4630 all sorts of PIC-related relocations. We describe below the
4631 general plan on how to handle such relocations, even though we only
4632 collect information at this point, storing them in hash tables for
4633 perusal of later passes.
4635 32 relocations are propagated to the linker output when creating
4636 position-independent output. LO16 and HI16 relocations are not
4637 supposed to be encountered in this case.
4639 LABEL16 should always be resolvable by the linker, since it's only
4642 LABEL24, on the other hand, is used by calls. If it turns out that
4643 the target of a call is a dynamic symbol, a PLT entry must be
4644 created for it, which triggers the creation of a private function
4645 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4647 GPREL relocations require the referenced symbol to be in the same
4648 segment as _gp, but this can only be checked later.
4650 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4651 exist. LABEL24 might as well, since it may require a PLT entry,
4652 that will require a got.
4654 Non-FUNCDESC GOT relocations require a GOT entry to be created
4655 regardless of whether the symbol is dynamic. However, since a
4656 global symbol that turns out to not be exported may have the same
4657 address of a non-dynamic symbol, we don't assign GOT entries at
4658 this point, such that we can share them in this case. A relocation
4659 for the GOT entry always has to be created, be it to offset a
4660 private symbol by the section load address, be it to get the symbol
4661 resolved dynamically.
4663 FUNCDESC GOT relocations require a GOT entry to be created, and
4664 handled as if a FUNCDESC relocation was applied to the GOT entry in
4667 FUNCDESC relocations referencing a symbol that turns out to NOT be
4668 dynamic cause a private function descriptor to be created. The
4669 FUNCDESC relocation then decays to a 32 relocation that points at
4670 the private descriptor. If the symbol is dynamic, the FUNCDESC
4671 relocation is propagated to the linker output, such that the
4672 dynamic linker creates the canonical descriptor, pointing to the
4673 dynamically-resolved definition of the function.
4675 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4676 symbols that are assigned to the same segment as the GOT, but we
4677 can only check this later, after we know the complete set of
4678 symbols defined and/or exported.
4680 FUNCDESC GOTOFF relocations require a function descriptor to be
4681 created and, unless lazy binding is disabled or the symbol is not
4682 dynamic, a lazy PLT entry. Since we can't tell at this point
4683 whether a symbol is going to be dynamic, we have to decide later
4684 whether to create a lazy PLT entry or bind the descriptor directly
4685 to the private function.
4687 FUNCDESC_VALUE relocations are not supposed to be present in object
4688 files, but they may very well be simply propagated to the linker
4689 output, since they have no side effect.
4692 A function descriptor always requires a FUNCDESC_VALUE relocation.
4693 Whether it's in .plt.rel or not depends on whether lazy binding is
4694 enabled and on whether the referenced symbol is dynamic.
4696 The existence of a lazy PLT requires the resolverStub lazy PLT
4697 entry to be present.
4700 As for assignment of GOT, PLT and lazy PLT entries, and private
4701 descriptors, we might do them all sequentially, but we can do
4702 better than that. For example, we can place GOT entries and
4703 private function descriptors referenced using 12-bit operands
4704 closer to the PIC register value, such that these relocations don't
4705 overflow. Those that are only referenced with LO16 relocations
4706 could come next, but we may as well place PLT-required function
4707 descriptors in the 12-bit range to make them shorter. Symbols
4708 referenced with LO16/HI16 may come next, but we may place
4709 additional function descriptors in the 16-bit range if we can
4710 reliably tell that we've already placed entries that are ever
4711 referenced with only LO16. PLT entries are therefore generated as
4712 small as possible, while not introducing relocation overflows in
4713 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4714 generated before or after PLT entries, but not intermingled with
4715 them, such that we can have more lazy PLT entries in range for a
4716 branch to the resolverStub. The resolverStub should be emitted at
4717 the most distant location from the first lazy PLT entry such that
4718 it's still in range for a branch, or closer, if there isn't a need
4719 for so many lazy PLT entries. Additional lazy PLT entries may be
4720 emitted after the resolverStub, as long as branches are still in
4721 range. If the branch goes out of range, longer lazy PLT entries
4724 We could further optimize PLT and lazy PLT entries by giving them
4725 priority in assignment to closer-to-gr17 locations depending on the
4726 number of occurrences of references to them (assuming a function
4727 that's called more often is more important for performance, so its
4728 PLT entry should be faster), or taking hints from the compiler.
4729 Given infinite time and money... :-) */
4732 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4733 asection *sec, const Elf_Internal_Rela *relocs)
4735 Elf_Internal_Shdr *symtab_hdr;
4736 struct elf_link_hash_entry **sym_hashes;
4737 const Elf_Internal_Rela *rel;
4738 const Elf_Internal_Rela *rel_end;
4740 struct bfinfdpic_relocs_info *picrel;
4742 if (bfd_link_relocatable (info))
4745 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4746 sym_hashes = elf_sym_hashes (abfd);
4748 dynobj = elf_hash_table (info)->dynobj;
4749 rel_end = relocs + sec->reloc_count;
4750 for (rel = relocs; rel < rel_end; rel++)
4752 struct elf_link_hash_entry *h;
4753 unsigned long r_symndx;
4755 r_symndx = ELF32_R_SYM (rel->r_info);
4756 if (r_symndx < symtab_hdr->sh_info)
4759 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4761 switch (ELF32_R_TYPE (rel->r_info))
4763 case R_BFIN_GOT17M4:
4766 case R_BFIN_FUNCDESC_GOT17M4:
4767 case R_BFIN_FUNCDESC_GOTHI:
4768 case R_BFIN_FUNCDESC_GOTLO:
4769 case R_BFIN_GOTOFF17M4:
4770 case R_BFIN_GOTOFFHI:
4771 case R_BFIN_GOTOFFLO:
4772 case R_BFIN_FUNCDESC_GOTOFF17M4:
4773 case R_BFIN_FUNCDESC_GOTOFFHI:
4774 case R_BFIN_FUNCDESC_GOTOFFLO:
4775 case R_BFIN_FUNCDESC:
4776 case R_BFIN_FUNCDESC_VALUE:
4777 if (! IS_FDPIC (abfd))
4780 case R_BFIN_PCREL24:
4781 case R_BFIN_PCREL24_JUMP_L:
4782 case R_BFIN_BYTE4_DATA:
4783 if (IS_FDPIC (abfd) && ! dynobj)
4785 elf_hash_table (info)->dynobj = dynobj = abfd;
4786 if (! _bfin_create_got_section (abfd, info))
4789 if (! IS_FDPIC (abfd))
4796 if (h->dynindx == -1)
4797 switch (ELF_ST_VISIBILITY (h->other))
4803 bfd_elf_link_record_dynamic_symbol (info, h);
4807 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4809 rel->r_addend, INSERT);
4812 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4813 (info), abfd, r_symndx,
4814 rel->r_addend, INSERT);
4824 switch (ELF32_R_TYPE (rel->r_info))
4826 case R_BFIN_PCREL24:
4827 case R_BFIN_PCREL24_JUMP_L:
4828 if (IS_FDPIC (abfd))
4832 case R_BFIN_FUNCDESC_VALUE:
4833 picrel->relocsfdv++;
4834 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4838 case R_BFIN_BYTE4_DATA:
4839 if (! IS_FDPIC (abfd))
4843 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4847 case R_BFIN_GOT17M4:
4856 case R_BFIN_FUNCDESC_GOT17M4:
4857 picrel->fdgot17m4++;
4860 case R_BFIN_FUNCDESC_GOTHI:
4861 case R_BFIN_FUNCDESC_GOTLO:
4862 picrel->fdgothilo++;
4865 case R_BFIN_GOTOFF17M4:
4866 case R_BFIN_GOTOFFHI:
4867 case R_BFIN_GOTOFFLO:
4871 case R_BFIN_FUNCDESC_GOTOFF17M4:
4872 picrel->fdgoff17m4++;
4875 case R_BFIN_FUNCDESC_GOTOFFHI:
4876 case R_BFIN_FUNCDESC_GOTOFFLO:
4877 picrel->fdgoffhilo++;
4880 case R_BFIN_FUNCDESC:
4885 /* This relocation describes the C++ object vtable hierarchy.
4886 Reconstruct it for later use during GC. */
4887 case R_BFIN_GNU_VTINHERIT:
4888 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4892 /* This relocation describes which C++ vtable entries are actually
4893 used. Record for later use during GC. */
4894 case R_BFIN_GNU_VTENTRY:
4895 BFD_ASSERT (h != NULL);
4897 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4901 case R_BFIN_HUIMM16:
4902 case R_BFIN_LUIMM16:
4903 case R_BFIN_PCREL12_JUMP_S:
4904 case R_BFIN_PCREL10:
4909 (*_bfd_error_handler)
4910 (_("%B: unsupported relocation type %i"),
4911 abfd, ELF32_R_TYPE (rel->r_info));
4919 /* Set the right machine number for a Blackfin ELF file. */
4922 elf32_bfin_object_p (bfd *abfd)
4924 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4925 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4926 == (IS_FDPIC (abfd)));
4930 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4932 elf_elfheader (abfd)->e_flags = flags;
4933 elf_flags_init (abfd) = TRUE;
4937 /* Display the flags field. */
4939 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr)
4941 FILE *file = (FILE *) ptr;
4944 BFD_ASSERT (abfd != NULL && ptr != NULL);
4946 /* Print normal ELF private data. */
4947 _bfd_elf_print_private_bfd_data (abfd, ptr);
4949 flags = elf_elfheader (abfd)->e_flags;
4951 /* xgettext:c-format */
4952 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4954 if (flags & EF_BFIN_PIC)
4955 fprintf (file, " -fpic");
4957 if (flags & EF_BFIN_FDPIC)
4958 fprintf (file, " -mfdpic");
4965 /* Merge backend specific data from an object file to the output
4966 object file when linking. */
4969 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4971 flagword old_flags, new_flags;
4972 bfd_boolean error = FALSE;
4974 new_flags = elf_elfheader (ibfd)->e_flags;
4975 old_flags = elf_elfheader (obfd)->e_flags;
4977 if (new_flags & EF_BFIN_FDPIC)
4978 new_flags &= ~EF_BFIN_PIC;
4983 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4984 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4985 bfd_get_filename (ibfd));
4987 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4989 elf_flags_init (obfd) = TRUE;
4990 elf_elfheader (obfd)->e_flags = new_flags;
4993 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
4996 if (IS_FDPIC (obfd))
4997 (*_bfd_error_handler)
4998 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4999 bfd_get_filename (ibfd));
5001 (*_bfd_error_handler)
5002 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5003 bfd_get_filename (ibfd));
5007 bfd_set_error (bfd_error_bad_value);
5012 /* bfin ELF linker hash entry. */
5014 struct bfin_link_hash_entry
5016 struct elf_link_hash_entry root;
5018 /* Number of PC relative relocs copied for this symbol. */
5019 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5022 /* bfin ELF linker hash table. */
5024 struct bfin_link_hash_table
5026 struct elf_link_hash_table root;
5028 /* Small local sym cache. */
5029 struct sym_cache sym_cache;
5032 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5034 static struct bfd_hash_entry *
5035 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5036 struct bfd_hash_table *table, const char *string)
5038 struct bfd_hash_entry *ret = entry;
5040 /* Allocate the structure if it has not already been allocated by a
5043 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5047 /* Call the allocation method of the superclass. */
5048 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5050 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5055 /* Create an bfin ELF linker hash table. */
5057 static struct bfd_link_hash_table *
5058 bfin_link_hash_table_create (bfd * abfd)
5060 struct bfin_link_hash_table *ret;
5061 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5063 ret = bfd_zmalloc (amt);
5067 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5068 bfin_link_hash_newfunc,
5069 sizeof (struct elf_link_hash_entry),
5076 ret->sym_cache.abfd = NULL;
5078 return &ret->root.root;
5081 /* The size in bytes of an entry in the procedure linkage table. */
5083 /* Finish up the dynamic sections. */
5086 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5087 struct bfd_link_info *info)
5092 dynobj = elf_hash_table (info)->dynobj;
5094 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5096 if (elf_hash_table (info)->dynamic_sections_created)
5098 Elf32_External_Dyn *dyncon, *dynconend;
5100 BFD_ASSERT (sdyn != NULL);
5102 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5103 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5104 for (; dyncon < dynconend; dyncon++)
5106 Elf_Internal_Dyn dyn;
5108 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5116 /* Finish up dynamic symbol handling. We set the contents of various
5117 dynamic sections here. */
5120 bfin_finish_dynamic_symbol (bfd * output_bfd,
5121 struct bfd_link_info *info,
5122 struct elf_link_hash_entry *h,
5123 Elf_Internal_Sym * sym)
5127 dynobj = elf_hash_table (info)->dynobj;
5129 if (h->got.offset != (bfd_vma) - 1)
5133 Elf_Internal_Rela rela;
5136 /* This symbol has an entry in the global offset table.
5139 sgot = bfd_get_linker_section (dynobj, ".got");
5140 srela = bfd_get_linker_section (dynobj, ".rela.got");
5141 BFD_ASSERT (sgot != NULL && srela != NULL);
5143 rela.r_offset = (sgot->output_section->vma
5144 + sgot->output_offset
5145 + (h->got.offset & ~(bfd_vma) 1));
5147 /* If this is a -Bsymbolic link, and the symbol is defined
5148 locally, we just want to emit a RELATIVE reloc. Likewise if
5149 the symbol was forced to be local because of a version file.
5150 The entry in the global offset table will already have been
5151 initialized in the relocate_section function. */
5152 if (bfd_link_pic (info)
5154 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5156 (*_bfd_error_handler) (_("*** check this relocation %s"),
5158 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5159 rela.r_addend = bfd_get_signed_32 (output_bfd,
5163 offset & ~(bfd_vma) 1)));
5167 bfd_put_32 (output_bfd, (bfd_vma) 0,
5168 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5169 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5173 loc = srela->contents;
5174 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5175 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5182 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5183 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5184 || h == elf_hash_table (info)->hgot)
5185 sym->st_shndx = SHN_ABS;
5190 /* Adjust a symbol defined by a dynamic object and referenced by a
5191 regular object. The current definition is in some section of the
5192 dynamic object, but we're not including those sections. We have to
5193 change the definition to something the rest of the link can
5197 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5198 struct elf_link_hash_entry *h)
5202 unsigned int power_of_two;
5204 dynobj = elf_hash_table (info)->dynobj;
5206 /* Make sure we know what is going on here. */
5207 BFD_ASSERT (dynobj != NULL
5209 || h->u.weakdef != NULL
5210 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5212 /* If this is a function, put it in the procedure linkage table. We
5213 will fill in the contents of the procedure linkage table later,
5214 when we know the address of the .got section. */
5215 if (h->type == STT_FUNC || h->needs_plt)
5220 /* If this is a weak symbol, and there is a real definition, the
5221 processor independent code will have arranged for us to see the
5222 real definition first, and we can just use the same value. */
5223 if (h->u.weakdef != NULL)
5225 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5226 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5227 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5228 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5232 /* This is a reference to a symbol defined by a dynamic object which
5233 is not a function. */
5235 /* If we are creating a shared library, we must presume that the
5236 only references to the symbol are via the global offset table.
5237 For such cases we need not do anything here; the relocations will
5238 be handled correctly by relocate_section. */
5239 if (bfd_link_pic (info))
5242 /* We must allocate the symbol in our .dynbss section, which will
5243 become part of the .bss section of the executable. There will be
5244 an entry for this symbol in the .dynsym section. The dynamic
5245 object will contain position independent code, so all references
5246 from the dynamic object to this symbol will go through the global
5247 offset table. The dynamic linker will use the .dynsym entry to
5248 determine the address it must put in the global offset table, so
5249 both the dynamic object and the regular object will refer to the
5250 same memory location for the variable. */
5252 s = bfd_get_linker_section (dynobj, ".dynbss");
5253 BFD_ASSERT (s != NULL);
5255 #if 0 /* Bfin does not currently have a COPY reloc. */
5256 /* We must generate a R_BFIN_COPY reloc to tell the dynamic linker to
5257 copy the initial value out of the dynamic object and into the
5258 runtime process image. We need to remember the offset into the
5259 .rela.bss section we are going to use. */
5260 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5264 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5265 BFD_ASSERT (srel != NULL);
5266 srel->size += sizeof (Elf32_External_Rela);
5270 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5272 (*_bfd_error_handler) (_("the bfin target does not currently support the generation of copy relocations"));
5276 /* We need to figure out the alignment required for this symbol. I
5277 have no idea how ELF linkers handle this. */
5278 power_of_two = bfd_log2 (h->size);
5279 if (power_of_two > 3)
5282 /* Apply the required alignment. */
5283 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5284 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5286 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5290 /* Define the symbol as being at this point in the section. */
5291 h->root.u.def.section = s;
5292 h->root.u.def.value = s->size;
5294 /* Increment the section size to make room for the symbol. */
5300 /* The bfin linker needs to keep track of the number of relocs that it
5301 decides to copy in check_relocs for each symbol. This is so that it
5302 can discard PC relative relocs if it doesn't need them when linking
5303 with -Bsymbolic. We store the information in a field extending the
5304 regular ELF linker hash table. */
5306 /* This structure keeps track of the number of PC relative relocs we have
5307 copied for a given symbol. */
5309 struct bfin_pcrel_relocs_copied
5312 struct bfin_pcrel_relocs_copied *next;
5313 /* A section in dynobj. */
5315 /* Number of relocs copied in this section. */
5316 bfd_size_type count;
5319 /* This function is called via elf_link_hash_traverse if we are
5320 creating a shared object. In the -Bsymbolic case it discards the
5321 space allocated to copy PC relative relocs against symbols which
5322 are defined in regular objects. For the normal shared case, it
5323 discards space for pc-relative relocs that have become local due to
5324 symbol visibility changes. We allocated space for them in the
5325 check_relocs routine, but we won't fill them in in the
5326 relocate_section routine.
5328 We also check whether any of the remaining relocations apply
5329 against a readonly section, and set the DF_TEXTREL flag in this
5333 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5335 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5336 struct bfin_pcrel_relocs_copied *s;
5338 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5340 if ((info->flags & DF_TEXTREL) == 0)
5342 /* Look for relocations against read-only sections. */
5343 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5344 s != NULL; s = s->next)
5345 if ((s->section->flags & SEC_READONLY) != 0)
5347 info->flags |= DF_TEXTREL;
5355 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5356 s != NULL; s = s->next)
5357 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5363 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5364 struct bfd_link_info *info)
5370 dynobj = elf_hash_table (info)->dynobj;
5371 BFD_ASSERT (dynobj != NULL);
5373 if (elf_hash_table (info)->dynamic_sections_created)
5375 /* Set the contents of the .interp section to the interpreter. */
5376 if (bfd_link_executable (info))
5378 s = bfd_get_linker_section (dynobj, ".interp");
5379 BFD_ASSERT (s != NULL);
5380 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5381 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5386 /* We may have created entries in the .rela.got section.
5387 However, if we are not creating the dynamic sections, we will
5388 not actually use these entries. Reset the size of .rela.got,
5389 which will cause it to get stripped from the output file
5391 s = bfd_get_linker_section (dynobj, ".rela.got");
5396 /* If this is a -Bsymbolic shared link, then we need to discard all
5397 PC relative relocs against symbols defined in a regular object.
5398 For the normal shared case we discard the PC relative relocs
5399 against symbols that have become local due to visibility changes.
5400 We allocated space for them in the check_relocs routine, but we
5401 will not fill them in in the relocate_section routine. */
5402 if (bfd_link_pic (info))
5403 elf_link_hash_traverse (elf_hash_table (info),
5404 bfin_discard_copies, info);
5406 /* The check_relocs and adjust_dynamic_symbol entry points have
5407 determined the sizes of the various dynamic sections. Allocate
5410 for (s = dynobj->sections; s != NULL; s = s->next)
5415 if ((s->flags & SEC_LINKER_CREATED) == 0)
5418 /* It's OK to base decisions on the section name, because none
5419 of the dynobj section names depend upon the input files. */
5420 name = bfd_get_section_name (dynobj, s);
5424 if (CONST_STRNEQ (name, ".rela"))
5428 /* If we don't need this section, strip it from the
5429 output file. This is mostly to handle .rela.bss and
5430 .rela.plt. We must create both sections in
5431 create_dynamic_sections, because they must be created
5432 before the linker maps input sections to output
5433 sections. The linker does that before
5434 adjust_dynamic_symbol is called, and it is that
5435 function which decides whether anything needs to go
5436 into these sections. */
5443 /* We use the reloc_count field as a counter if we need
5444 to copy relocs into the output file. */
5448 else if (! CONST_STRNEQ (name, ".got"))
5450 /* It's not one of our sections, so don't allocate space. */
5456 s->flags |= SEC_EXCLUDE;
5460 /* Allocate memory for the section contents. */
5461 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5462 Unused entries should be reclaimed before the section's contents
5463 are written out, but at the moment this does not happen. Thus in
5464 order to prevent writing out garbage, we initialise the section's
5465 contents to zero. */
5466 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5467 if (s->contents == NULL && s->size != 0)
5471 if (elf_hash_table (info)->dynamic_sections_created)
5473 /* Add some entries to the .dynamic section. We fill in the
5474 values later, in bfin_finish_dynamic_sections, but we
5475 must add the entries now so that we get the correct size for
5476 the .dynamic section. The DT_DEBUG entry is filled in by the
5477 dynamic linker and used by the debugger. */
5478 #define add_dynamic_entry(TAG, VAL) \
5479 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5481 if (!bfd_link_pic (info))
5483 if (!add_dynamic_entry (DT_DEBUG, 0))
5490 if (!add_dynamic_entry (DT_RELA, 0)
5491 || !add_dynamic_entry (DT_RELASZ, 0)
5492 || !add_dynamic_entry (DT_RELAENT,
5493 sizeof (Elf32_External_Rela)))
5497 if ((info->flags & DF_TEXTREL) != 0)
5499 if (!add_dynamic_entry (DT_TEXTREL, 0))
5503 #undef add_dynamic_entry
5508 /* Given a .data section and a .emreloc in-memory section, store
5509 relocation information into the .emreloc section which can be
5510 used at runtime to relocate the section. This is called by the
5511 linker when the --embedded-relocs switch is used. This is called
5512 after the add_symbols entry point has been called for all the
5513 objects, and before the final_link entry point is called. */
5516 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5517 struct bfd_link_info *info,
5522 Elf_Internal_Shdr *symtab_hdr;
5523 Elf_Internal_Sym *isymbuf = NULL;
5524 Elf_Internal_Rela *internal_relocs = NULL;
5525 Elf_Internal_Rela *irel, *irelend;
5529 BFD_ASSERT (! bfd_link_relocatable (info));
5533 if (datasec->reloc_count == 0)
5536 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5538 /* Get a copy of the native relocations. */
5539 internal_relocs = (_bfd_elf_link_read_relocs
5540 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5541 info->keep_memory));
5542 if (internal_relocs == NULL)
5545 amt = (bfd_size_type) datasec->reloc_count * 12;
5546 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5547 if (relsec->contents == NULL)
5550 p = relsec->contents;
5552 irelend = internal_relocs + datasec->reloc_count;
5553 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5555 asection *targetsec;
5557 /* We are going to write a four byte longword into the runtime
5558 reloc section. The longword will be the address in the data
5559 section which must be relocated. It is followed by the name
5560 of the target section NUL-padded or truncated to 8
5563 /* We can only relocate absolute longword relocs at run time. */
5564 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5566 *errmsg = _("unsupported reloc type");
5567 bfd_set_error (bfd_error_bad_value);
5571 /* Get the target section referred to by the reloc. */
5572 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5574 /* A local symbol. */
5575 Elf_Internal_Sym *isym;
5577 /* Read this BFD's local symbols if we haven't done so already. */
5578 if (isymbuf == NULL)
5580 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5581 if (isymbuf == NULL)
5582 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5583 symtab_hdr->sh_info, 0,
5585 if (isymbuf == NULL)
5589 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5590 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5595 struct elf_link_hash_entry *h;
5597 /* An external symbol. */
5598 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5599 h = elf_sym_hashes (abfd)[indx];
5600 BFD_ASSERT (h != NULL);
5601 if (h->root.type == bfd_link_hash_defined
5602 || h->root.type == bfd_link_hash_defweak)
5603 targetsec = h->root.u.def.section;
5608 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5609 memset (p + 4, 0, 8);
5610 if (targetsec != NULL)
5611 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5614 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5616 if (internal_relocs != NULL
5617 && elf_section_data (datasec)->relocs != internal_relocs)
5618 free (internal_relocs);
5622 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5624 if (internal_relocs != NULL
5625 && elf_section_data (datasec)->relocs != internal_relocs)
5626 free (internal_relocs);
5630 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5632 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5633 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5634 { NULL, 0, 0, 0, 0 }
5638 #define TARGET_LITTLE_SYM bfin_elf32_vec
5639 #define TARGET_LITTLE_NAME "elf32-bfin"
5640 #define ELF_ARCH bfd_arch_bfin
5641 #define ELF_TARGET_ID BFIN_ELF_DATA
5642 #define ELF_MACHINE_CODE EM_BLACKFIN
5643 #define ELF_MAXPAGESIZE 0x1000
5644 #define elf_symbol_leading_char '_'
5646 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5647 #define bfd_elf32_bfd_reloc_name_lookup \
5648 bfin_bfd_reloc_name_lookup
5649 #define elf_info_to_howto bfin_info_to_howto
5650 #define elf_info_to_howto_rel 0
5651 #define elf_backend_object_p elf32_bfin_object_p
5653 #define bfd_elf32_bfd_is_local_label_name \
5654 bfin_is_local_label_name
5655 #define bfin_hash_table(p) \
5656 ((struct bfin_link_hash_table *) (p)->hash)
5660 #define elf_backend_create_dynamic_sections \
5661 _bfd_elf_create_dynamic_sections
5662 #define bfd_elf32_bfd_link_hash_table_create \
5663 bfin_link_hash_table_create
5664 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5666 #define elf_backend_check_relocs bfin_check_relocs
5667 #define elf_backend_adjust_dynamic_symbol \
5668 bfin_adjust_dynamic_symbol
5669 #define elf_backend_size_dynamic_sections \
5670 bfin_size_dynamic_sections
5671 #define elf_backend_relocate_section bfin_relocate_section
5672 #define elf_backend_finish_dynamic_symbol \
5673 bfin_finish_dynamic_symbol
5674 #define elf_backend_finish_dynamic_sections \
5675 bfin_finish_dynamic_sections
5676 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5677 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5678 #define bfd_elf32_bfd_merge_private_bfd_data \
5679 elf32_bfin_merge_private_bfd_data
5680 #define bfd_elf32_bfd_set_private_flags \
5681 elf32_bfin_set_private_flags
5682 #define bfd_elf32_bfd_print_private_bfd_data \
5683 elf32_bfin_print_private_bfd_data
5684 #define elf_backend_final_write_processing \
5685 elf32_bfin_final_write_processing
5686 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5687 #define elf_backend_stack_align 8
5688 #define elf_backend_can_gc_sections 1
5689 #define elf_backend_special_sections elf32_bfin_special_sections
5690 #define elf_backend_can_refcount 1
5691 #define elf_backend_want_got_plt 0
5692 #define elf_backend_plt_readonly 1
5693 #define elf_backend_want_plt_sym 0
5694 #define elf_backend_got_header_size 12
5695 #define elf_backend_rela_normal 1
5697 #include "elf32-target.h"
5699 #undef TARGET_LITTLE_SYM
5700 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5701 #undef TARGET_LITTLE_NAME
5702 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5704 #define elf32_bed elf32_bfinfdpic_bed
5706 #undef elf_backend_gc_sweep_hook
5707 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5709 #undef elf_backend_got_header_size
5710 #define elf_backend_got_header_size 0
5712 #undef elf_backend_relocate_section
5713 #define elf_backend_relocate_section bfinfdpic_relocate_section
5714 #undef elf_backend_check_relocs
5715 #define elf_backend_check_relocs bfinfdpic_check_relocs
5717 #undef bfd_elf32_bfd_link_hash_table_create
5718 #define bfd_elf32_bfd_link_hash_table_create \
5719 bfinfdpic_elf_link_hash_table_create
5720 #undef elf_backend_always_size_sections
5721 #define elf_backend_always_size_sections \
5722 elf32_bfinfdpic_always_size_sections
5724 #undef elf_backend_create_dynamic_sections
5725 #define elf_backend_create_dynamic_sections \
5726 elf32_bfinfdpic_create_dynamic_sections
5727 #undef elf_backend_adjust_dynamic_symbol
5728 #define elf_backend_adjust_dynamic_symbol \
5729 elf32_bfinfdpic_adjust_dynamic_symbol
5730 #undef elf_backend_size_dynamic_sections
5731 #define elf_backend_size_dynamic_sections \
5732 elf32_bfinfdpic_size_dynamic_sections
5733 #undef elf_backend_finish_dynamic_symbol
5734 #define elf_backend_finish_dynamic_symbol \
5735 elf32_bfinfdpic_finish_dynamic_symbol
5736 #undef elf_backend_finish_dynamic_sections
5737 #define elf_backend_finish_dynamic_sections \
5738 elf32_bfinfdpic_finish_dynamic_sections
5740 #undef elf_backend_discard_info
5741 #define elf_backend_discard_info \
5742 bfinfdpic_elf_discard_info
5743 #undef elf_backend_can_make_relative_eh_frame
5744 #define elf_backend_can_make_relative_eh_frame \
5745 bfinfdpic_elf_use_relative_eh_frame
5746 #undef elf_backend_can_make_lsda_relative_eh_frame
5747 #define elf_backend_can_make_lsda_relative_eh_frame \
5748 bfinfdpic_elf_use_relative_eh_frame
5749 #undef elf_backend_encode_eh_address
5750 #define elf_backend_encode_eh_address \
5751 bfinfdpic_elf_encode_eh_address
5753 #undef elf_backend_may_use_rel_p
5754 #define elf_backend_may_use_rel_p 1
5755 #undef elf_backend_may_use_rela_p
5756 #define elf_backend_may_use_rela_p 1
5757 /* We use REL for dynamic relocations only. */
5758 #undef elf_backend_default_use_rela_p
5759 #define elf_backend_default_use_rela_p 1
5761 #undef elf_backend_omit_section_dynsym
5762 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5764 #include "elf32-target.h"