1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright (C) 2005-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
33 bfd *abfd ATTRIBUTE_UNUSED,
34 arelent *reloc_entry ATTRIBUTE_UNUSED,
35 asymbol *symbol ATTRIBUTE_UNUSED,
36 void * data ATTRIBUTE_UNUSED,
37 asection *input_section ATTRIBUTE_UNUSED,
38 bfd *output_bfd ATTRIBUTE_UNUSED,
39 char **error_message ATTRIBUTE_UNUSED)
41 bfd_reloc_status_type flag = bfd_reloc_ok;
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd *abfd,
51 asection *input_section,
53 char **error_message ATTRIBUTE_UNUSED)
56 bfd_size_type addr = reloc_entry->address;
57 bfd_vma output_base = 0;
58 reloc_howto_type *howto = reloc_entry->howto;
59 asection *output_section;
60 bfd_boolean relocatable = (output_bfd != NULL);
62 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63 return bfd_reloc_outofrange;
65 if (bfd_is_und_section (symbol->section)
66 && (symbol->flags & BSF_WEAK) == 0
68 return bfd_reloc_undefined;
70 if (bfd_is_com_section (symbol->section))
73 relocation = symbol->value;
75 output_section = symbol->section->output_section;
80 output_base = output_section->vma;
82 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83 relocation += output_base + symbol->section->output_offset;
85 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86 relocation += reloc_entry->addend;
88 relocation -= input_section->output_section->vma + input_section->output_offset;
89 relocation -= reloc_entry->address;
91 if (howto->complain_on_overflow != complain_overflow_dont)
93 bfd_reloc_status_type status;
94 status = bfd_check_overflow (howto->complain_on_overflow,
97 bfd_arch_bits_per_address(abfd),
99 if (status != bfd_reloc_ok)
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto->rightshift && (relocation & 0x01))
106 (*_bfd_error_handler) (_("relocation should be even number"));
107 return bfd_reloc_overflow;
110 relocation >>= (bfd_vma) howto->rightshift;
111 /* Shift everything up to where it's going to be used. */
113 relocation <<= (bfd_vma) howto->bitpos;
117 reloc_entry->address += input_section->output_offset;
118 reloc_entry->addend += symbol->section->output_offset;
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
132 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
136 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137 x = relocation & 0xFFFF;
138 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd *abfd,
145 arelent *reloc_entry,
148 asection *input_section,
150 char **error_message ATTRIBUTE_UNUSED)
152 bfd_vma relocation, x;
153 bfd_size_type reloc_addr = reloc_entry->address;
154 bfd_vma output_base = 0;
155 reloc_howto_type *howto = reloc_entry->howto;
156 asection *output_section;
157 bfd_boolean relocatable = (output_bfd != NULL);
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161 return bfd_reloc_outofrange;
163 if (bfd_is_und_section (symbol->section)
164 && (symbol->flags & BSF_WEAK) == 0
166 return bfd_reloc_undefined;
168 output_section = symbol->section->output_section;
169 relocation = symbol->value;
171 /* Convert input-section-relative symbol value to absolute. */
175 output_base = output_section->vma;
177 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178 relocation += output_base + symbol->section->output_offset;
180 /* Add in supplied addend. */
181 relocation += reloc_entry->addend;
185 reloc_entry->address += input_section->output_offset;
186 reloc_entry->addend += symbol->section->output_offset;
190 reloc_entry->addend = 0;
193 if (howto->complain_on_overflow != complain_overflow_dont)
195 bfd_reloc_status_type flag;
196 flag = bfd_check_overflow (howto->complain_on_overflow,
199 bfd_arch_bits_per_address(abfd),
201 if (flag != bfd_reloc_ok)
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
208 relocation >>= (bfd_vma) howto->rightshift;
210 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd *abfd,
217 arelent *reloc_entry,
220 asection *input_section,
222 char **error_message ATTRIBUTE_UNUSED)
224 bfd_vma relocation, x;
225 bfd_size_type addr = reloc_entry->address;
226 bfd_vma output_base = 0;
227 asection *output_section;
228 bfd_boolean relocatable = (output_bfd != NULL);
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232 return bfd_reloc_outofrange;
234 if (bfd_is_und_section (symbol->section)
235 && (symbol->flags & BSF_WEAK) == 0
237 return bfd_reloc_undefined;
239 output_section = symbol->section->output_section;
240 relocation = symbol->value;
241 /* Convert input-section-relative symbol value to absolute. */
245 output_base = output_section->vma;
248 && symbol->section->name
249 && !strcmp (symbol->name, symbol->section->name))
252 relocation += output_base + symbol->section->output_offset;
255 relocation += reloc_entry->addend;
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry->address += input_section->output_offset;
261 reloc_entry->addend += symbol->section->output_offset;
265 reloc_entry->addend = 0;
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x = relocation & 0xFFFF0000;
272 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
274 x = relocation & 0x0000FFFF;
275 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd *abfd,
283 arelent *reloc_entry,
286 asection *input_section,
288 char **error_message ATTRIBUTE_UNUSED)
291 bfd_size_type addr = reloc_entry->address;
292 bfd_vma output_base = 0;
293 reloc_howto_type *howto = reloc_entry->howto;
294 asection *output_section;
295 bfd_boolean relocatable = (output_bfd != NULL);
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299 return bfd_reloc_outofrange;
301 if (bfd_is_und_section (symbol->section)
302 && (symbol->flags & BSF_WEAK) == 0
304 return bfd_reloc_undefined;
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol->section))
310 relocation = symbol->value;
312 output_section = symbol->section->output_section;
314 /* Convert input-section-relative symbol value to absolute. */
318 output_base = output_section->vma;
320 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321 relocation += output_base + symbol->section->output_offset;
323 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
325 /* Add in supplied addend. */
326 relocation += reloc_entry->addend;
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
332 if (howto->pc_relative == TRUE)
334 relocation -= input_section->output_section->vma + input_section->output_offset;
336 if (howto->pcrel_offset == TRUE)
337 relocation -= reloc_entry->address;
342 reloc_entry->address += input_section->output_offset;
343 reloc_entry->addend += symbol->section->output_offset;
346 if (howto->complain_on_overflow != complain_overflow_dont)
348 bfd_reloc_status_type status;
350 status = bfd_check_overflow (howto->complain_on_overflow,
353 bfd_arch_bits_per_address(abfd),
355 if (status != bfd_reloc_ok)
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto->rightshift && (relocation & 0x01))
362 (*_bfd_error_handler) (_("relocation should be even number"));
363 return bfd_reloc_overflow;
366 relocation >>= (bfd_vma) howto->rightshift;
368 /* Shift everything up to where it's going to be used. */
370 relocation <<= (bfd_vma) howto->bitpos;
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
375 /* handle 8 and 16 bit relocations here. */
380 char x = bfd_get_8 (abfd, (char *) data + addr);
382 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
388 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
390 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
395 return bfd_reloc_other;
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
421 static reloc_howto_type bfin_howto_table [] =
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0, /* type. */
426 3, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE, /* pc_relative. */
430 complain_overflow_dont, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE, /* partial_inplace. */
436 FALSE), /* pcrel_offset. */
438 HOWTO (R_BFIN_PCREL5M2, /* type. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
442 TRUE, /* pc_relative. */
444 complain_overflow_unsigned, /* complain_on_overflow. */
445 bfin_bfd_reloc, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
452 HOWTO (R_BFIN_UNUSED1, /* type. */
454 3, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE, /* pc_relative. */
458 complain_overflow_dont, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE, /* partial_inplace. */
464 FALSE), /* pcrel_offset. */
466 HOWTO (R_BFIN_PCREL10, /* type. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
470 TRUE, /* pc_relative. */
472 complain_overflow_signed, /* complain_on_overflow. */
473 bfin_bfd_reloc, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
480 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
488 TRUE, /* pc_relative. */
490 complain_overflow_signed, /* complain_on_overflow. */
491 bfin_bfd_reloc, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
498 HOWTO (R_BFIN_RIMM16, /* type. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
502 FALSE, /* pc_relative. */
504 complain_overflow_signed, /* complain_on_overflow. */
505 bfin_imm16_reloc, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
512 HOWTO (R_BFIN_LUIMM16, /* type. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
516 FALSE, /* pc_relative. */
518 complain_overflow_dont, /* complain_on_overflow. */
519 bfin_imm16_reloc, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
526 HOWTO (R_BFIN_HUIMM16, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
530 FALSE, /* pc_relative. */
532 complain_overflow_unsigned, /* complain_on_overflow. */
533 bfin_imm16_reloc, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
540 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
544 TRUE, /* pc_relative. */
546 complain_overflow_signed, /* complain_on_overflow. */
547 bfin_bfd_reloc, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
554 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
558 TRUE, /* pc_relative. */
560 complain_overflow_signed, /* complain_on_overflow. */
561 bfin_pcrel24_reloc, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
568 HOWTO (R_BFIN_PCREL24, /* type. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
572 TRUE, /* pc_relative. */
574 complain_overflow_signed, /* complain_on_overflow. */
575 bfin_pcrel24_reloc, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
582 HOWTO (R_BFIN_UNUSEDB, /* type. */
584 3, /* size (0 = byte, 1 = short, 2 = long). */
586 FALSE, /* pc_relative. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE, /* partial_inplace. */
594 FALSE), /* pcrel_offset. */
596 HOWTO (R_BFIN_UNUSEDC, /* type. */
598 3, /* size (0 = byte, 1 = short, 2 = long). */
600 FALSE, /* pc_relative. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE, /* partial_inplace. */
608 FALSE), /* pcrel_offset. */
610 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
614 TRUE, /* pc_relative. */
616 complain_overflow_signed, /* complain_on_overflow. */
617 bfin_pcrel24_reloc, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
624 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
628 TRUE, /* pc_relative. */
630 complain_overflow_signed, /* complain_on_overflow. */
631 bfin_pcrel24_reloc, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
638 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
642 FALSE, /* pc_relative. */
644 complain_overflow_bitfield, /* complain_on_overflow. */
645 bfin_bfd_reloc, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE, /* partial_inplace. */
650 FALSE), /* pcrel_offset. */
652 HOWTO (R_BFIN_BYTE_DATA, /* type. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
656 FALSE, /* pc_relative. */
658 complain_overflow_unsigned, /* complain_on_overflow. */
659 bfin_bfd_reloc, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
666 HOWTO (R_BFIN_BYTE2_DATA, /* type. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
670 FALSE, /* pc_relative. */
672 complain_overflow_signed, /* complain_on_overflow. */
673 bfin_bfd_reloc, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
680 HOWTO (R_BFIN_BYTE4_DATA, /* type. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
684 FALSE, /* pc_relative. */
686 complain_overflow_unsigned, /* complain_on_overflow. */
687 bfin_byte4_reloc, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
694 HOWTO (R_BFIN_PCREL11, /* type. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
698 TRUE, /* pc_relative. */
700 complain_overflow_unsigned, /* complain_on_overflow. */
701 bfin_bfd_reloc, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE, /* partial_inplace. */
705 0x000003FF, /* dst_mask. */
706 FALSE), /* pcrel_offset. */
709 /* A 18-bit signed operand with the GOT offset for the address of
711 HOWTO (R_BFIN_GOT17M4, /* type */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
715 FALSE, /* pc_relative */
717 complain_overflow_signed, /* complain_on_overflow */
718 bfd_elf_generic_reloc, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
725 /* The upper 16 bits of the GOT offset for the address of the
727 HOWTO (R_BFIN_GOTHI, /* type */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
731 FALSE, /* pc_relative */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
741 /* The lower 16 bits of the GOT offset for the address of the
743 HOWTO (R_BFIN_GOTLO, /* type */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
747 FALSE, /* pc_relative */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC, /* type */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
762 FALSE, /* pc_relative */
764 complain_overflow_bitfield, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE, /* pc_relative */
780 complain_overflow_signed, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
794 FALSE, /* pc_relative */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
810 FALSE, /* pc_relative */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE, /* pc_relative */
827 complain_overflow_bitfield, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE, /* pc_relative */
843 complain_overflow_signed, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
857 FALSE, /* pc_relative */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
873 FALSE, /* pc_relative */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
883 /* A 12-bit signed operand with the GOT offset for the address of
885 HOWTO (R_BFIN_GOTOFF17M4, /* type */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
889 FALSE, /* pc_relative */
891 complain_overflow_signed, /* complain_on_overflow */
892 bfd_elf_generic_reloc, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
899 /* The upper 16 bits of the GOT offset for the address of the
901 HOWTO (R_BFIN_GOTOFFHI, /* type */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
905 FALSE, /* pc_relative */
907 complain_overflow_dont, /* complain_on_overflow */
908 bfd_elf_generic_reloc, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
915 /* The lower 16 bits of the GOT offset for the address of the
917 HOWTO (R_BFIN_GOTOFFLO, /* type */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
921 FALSE, /* pc_relative */
923 complain_overflow_dont, /* complain_on_overflow */
924 bfd_elf_generic_reloc, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
932 static reloc_howto_type bfin_gnuext_howto_table [] =
934 HOWTO (R_BFIN_PLTPC, /* type. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
938 FALSE, /* pc_relative. */
940 complain_overflow_bitfield, /* complain_on_overflow. */
941 bfin_pltpc_reloc, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
948 HOWTO (R_BFIN_GOT, /* type. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
952 FALSE, /* pc_relative. */
954 complain_overflow_bitfield, /* complain_on_overflow. */
955 bfd_elf_generic_reloc, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE), /* pcrel_offset. */
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
967 FALSE, /* pc_relative. */
969 complain_overflow_dont, /* complain_on_overflow. */
970 NULL, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE, /* partial_inplace. */
975 FALSE), /* pcrel_offset. */
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
982 FALSE, /* pc_relative. */
984 complain_overflow_dont, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE, /* partial_inplace. */
990 FALSE) /* pcrel_offset. */
993 struct bfin_reloc_map
995 bfd_reloc_code_real_type bfd_reloc_val;
996 unsigned int bfin_reloc_val;
999 static const struct bfin_reloc_map bfin_reloc_map [] =
1001 { BFD_RELOC_NONE, R_BFIN_UNUSED0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 },
1003 { BFD_RELOC_NONE, R_BFIN_UNUSED1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP },
1006 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S },
1010 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L },
1013 { BFD_RELOC_NONE, R_BFIN_UNUSEDB },
1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDC },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X },
1016 { BFD_RELOC_8, R_BFIN_BYTE_DATA },
1017 { BFD_RELOC_16, R_BFIN_BYTE2_DATA },
1018 { BFD_RELOC_32, R_BFIN_BYTE4_DATA },
1019 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 },
1020 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT },
1021 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC },
1023 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
1024 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
1025 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
1026 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1034 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
1035 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
1036 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
1038 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
1039 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
1044 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1046 Elf_Internal_Rela *dst)
1048 unsigned int r_type;
1050 r_type = ELF32_R_TYPE (dst->r_info);
1052 if (r_type <= BFIN_RELOC_MAX)
1053 cache_ptr->howto = &bfin_howto_table [r_type];
1055 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1056 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1059 cache_ptr->howto = (reloc_howto_type *) NULL;
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type *
1064 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1065 bfd_reloc_code_real_type code)
1068 unsigned int r_type = (unsigned int) -1;
1070 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); i--;)
1071 if (bfin_reloc_map[i].bfd_reloc_val == code)
1072 r_type = bfin_reloc_map[i].bfin_reloc_val;
1074 if (r_type <= BFIN_RELOC_MAX)
1075 return &bfin_howto_table [r_type];
1077 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1080 return (reloc_howto_type *) NULL;
1083 static reloc_howto_type *
1084 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1090 i < (sizeof (bfin_howto_table)
1091 / sizeof (bfin_howto_table[0]));
1093 if (bfin_howto_table[i].name != NULL
1094 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1095 return &bfin_howto_table[i];
1098 i < (sizeof (bfin_gnuext_howto_table)
1099 / sizeof (bfin_gnuext_howto_table[0]));
1101 if (bfin_gnuext_howto_table[i].name != NULL
1102 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1103 return &bfin_gnuext_howto_table[i];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type *
1110 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1111 unsigned int r_type)
1113 if (r_type <= BFIN_RELOC_MAX)
1114 return &bfin_howto_table [r_type];
1116 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1117 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1119 return (reloc_howto_type *) NULL;
1122 /* Set by ld emulation if --code-in-l1. */
1123 bfd_boolean elf32_bfin_code_in_l1 = 0;
1125 /* Set by ld emulation if --data-in-l1. */
1126 bfd_boolean elf32_bfin_data_in_l1 = 0;
1129 elf32_bfin_final_write_processing (bfd *abfd,
1130 bfd_boolean linker ATTRIBUTE_UNUSED)
1132 if (elf32_bfin_code_in_l1)
1133 elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1;
1134 if (elf32_bfin_data_in_l1)
1135 elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1;
1138 /* Return TRUE if the name is a local label.
1139 bfin local labels begin with L$. */
1141 bfin_is_local_label_name (bfd *abfd, const char *label)
1143 if (label[0] == 'L' && label[1] == '$' )
1146 return _bfd_elf_is_local_label_name (abfd, label);
1149 /* Look through the relocs for a section during the first phase, and
1150 allocate space in the global offset table or procedure linkage
1154 bfin_check_relocs (bfd * abfd,
1155 struct bfd_link_info *info,
1157 const Elf_Internal_Rela *relocs)
1160 Elf_Internal_Shdr *symtab_hdr;
1161 struct elf_link_hash_entry **sym_hashes;
1162 bfd_signed_vma *local_got_refcounts;
1163 const Elf_Internal_Rela *rel;
1164 const Elf_Internal_Rela *rel_end;
1168 if (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)
1627 if (!(info->callbacks->reloc_overflow
1628 (info, (h ? &h->root : NULL), name, howto->name,
1629 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1634 (*_bfd_error_handler)
1635 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1636 input_bfd, input_section,
1637 (long) rel->r_offset, name, (int) r);
1647 bfin_gc_mark_hook (asection * sec,
1648 struct bfd_link_info *info,
1649 Elf_Internal_Rela * rel,
1650 struct elf_link_hash_entry *h,
1651 Elf_Internal_Sym * sym)
1654 switch (ELF32_R_TYPE (rel->r_info))
1656 case R_BFIN_GNU_VTINHERIT:
1657 case R_BFIN_GNU_VTENTRY:
1661 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1664 /* Update the got entry reference counts for the section being removed. */
1667 bfin_gc_sweep_hook (bfd * abfd,
1668 struct bfd_link_info *info,
1670 const Elf_Internal_Rela * relocs)
1672 Elf_Internal_Shdr *symtab_hdr;
1673 struct elf_link_hash_entry **sym_hashes;
1674 bfd_signed_vma *local_got_refcounts;
1675 const Elf_Internal_Rela *rel, *relend;
1680 dynobj = elf_hash_table (info)->dynobj;
1684 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1685 sym_hashes = elf_sym_hashes (abfd);
1686 local_got_refcounts = elf_local_got_refcounts (abfd);
1688 sgot = bfd_get_linker_section (dynobj, ".got");
1689 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1691 relend = relocs + sec->reloc_count;
1692 for (rel = relocs; rel < relend; rel++)
1694 unsigned long r_symndx;
1695 struct elf_link_hash_entry *h;
1697 switch (ELF32_R_TYPE (rel->r_info))
1700 r_symndx = ELF32_R_SYM (rel->r_info);
1701 if (r_symndx >= symtab_hdr->sh_info)
1703 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1704 if (h->got.refcount > 0)
1707 if (h->got.refcount == 0)
1709 /* We don't need the .got entry any more. */
1711 srelgot->size -= sizeof (Elf32_External_Rela);
1715 else if (local_got_refcounts != NULL)
1717 if (local_got_refcounts[r_symndx] > 0)
1719 --local_got_refcounts[r_symndx];
1720 if (local_got_refcounts[r_symndx] == 0)
1722 /* We don't need the .got entry any more. */
1724 if (bfd_link_pic (info))
1725 srelgot->size -= sizeof (Elf32_External_Rela);
1737 extern const bfd_target bfin_elf32_fdpic_vec;
1738 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfin_elf32_fdpic_vec)
1740 /* An extension of the elf hash table data structure,
1741 containing some additional Blackfin-specific data. */
1742 struct bfinfdpic_elf_link_hash_table
1744 struct elf_link_hash_table elf;
1746 /* A pointer to the .got section. */
1748 /* A pointer to the .rel.got section. */
1750 /* A pointer to the .rofixup section. */
1751 asection *sgotfixup;
1752 /* A pointer to the .plt section. */
1754 /* A pointer to the .rel.plt section. */
1756 /* GOT base offset. */
1758 /* Location of the first non-lazy PLT entry, i.e., the number of
1759 bytes taken by lazy PLT entries. */
1761 /* A hash table holding information about which symbols were
1762 referenced with which PIC-related relocations. */
1763 struct htab *relocs_info;
1764 /* Summary reloc information collected by
1765 _bfinfdpic_count_got_plt_entries. */
1766 struct _bfinfdpic_dynamic_got_info *g;
1769 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1771 #define bfinfdpic_hash_table(info) \
1772 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1773 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1775 #define bfinfdpic_got_section(info) \
1776 (bfinfdpic_hash_table (info)->sgot)
1777 #define bfinfdpic_gotrel_section(info) \
1778 (bfinfdpic_hash_table (info)->sgotrel)
1779 #define bfinfdpic_gotfixup_section(info) \
1780 (bfinfdpic_hash_table (info)->sgotfixup)
1781 #define bfinfdpic_plt_section(info) \
1782 (bfinfdpic_hash_table (info)->splt)
1783 #define bfinfdpic_pltrel_section(info) \
1784 (bfinfdpic_hash_table (info)->spltrel)
1785 #define bfinfdpic_relocs_info(info) \
1786 (bfinfdpic_hash_table (info)->relocs_info)
1787 #define bfinfdpic_got_initial_offset(info) \
1788 (bfinfdpic_hash_table (info)->got0)
1789 #define bfinfdpic_plt_initial_offset(info) \
1790 (bfinfdpic_hash_table (info)->plt0)
1791 #define bfinfdpic_dynamic_got_plt_info(info) \
1792 (bfinfdpic_hash_table (info)->g)
1794 /* The name of the dynamic interpreter. This is put in the .interp
1797 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1799 #define DEFAULT_STACK_SIZE 0x20000
1801 /* This structure is used to collect the number of entries present in
1802 each addressable range of the got. */
1803 struct _bfinfdpic_dynamic_got_info
1805 /* Several bits of information about the current link. */
1806 struct bfd_link_info *info;
1807 /* Total size needed for GOT entries within the 18- or 32-bit
1809 bfd_vma got17m4, gothilo;
1810 /* Total size needed for function descriptor entries within the 18-
1811 or 32-bit ranges. */
1812 bfd_vma fd17m4, fdhilo;
1813 /* Total size needed function descriptor entries referenced in PLT
1814 entries, that would be profitable to place in offsets close to
1815 the PIC register. */
1817 /* Total size needed by lazy PLT entries. */
1819 /* Number of relocations carried over from input object files. */
1820 unsigned long relocs;
1821 /* Number of fixups introduced by relocations in input object files. */
1822 unsigned long fixups;
1825 /* Create a Blackfin ELF linker hash table. */
1827 static struct bfd_link_hash_table *
1828 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1830 struct bfinfdpic_elf_link_hash_table *ret;
1831 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1833 ret = bfd_zmalloc (amt);
1837 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1838 _bfd_elf_link_hash_newfunc,
1839 sizeof (struct elf_link_hash_entry),
1846 return &ret->elf.root;
1849 /* Decide whether a reference to a symbol can be resolved locally or
1850 not. If the symbol is protected, we want the local address, but
1851 its function descriptor must be assigned by the dynamic linker. */
1852 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1853 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1854 || ! elf_hash_table (INFO)->dynamic_sections_created)
1855 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1856 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1858 /* This structure collects information on what kind of GOT, PLT or
1859 function descriptors are required by relocations that reference a
1861 struct bfinfdpic_relocs_info
1863 /* The index of the symbol, as stored in the relocation r_info, if
1864 we have a local symbol; -1 otherwise. */
1868 /* The input bfd in which the symbol is defined, if it's a local
1871 /* If symndx == -1, the hash table entry corresponding to a global
1872 symbol (even if it turns out to bind locally, in which case it
1873 should ideally be replaced with section's symndx + addend). */
1874 struct elf_link_hash_entry *h;
1876 /* The addend of the relocation that references the symbol. */
1879 /* The fields above are used to identify an entry. The fields below
1880 contain information on how an entry is used and, later on, which
1881 locations it was assigned. */
1882 /* The following 2 fields record whether the symbol+addend above was
1883 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1884 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1887 /* Whether a FUNCDESC relocation references symbol+addend. */
1889 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1892 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1893 unsigned fdgoff17m4;
1894 unsigned fdgoffhilo;
1895 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1896 GOTOFFHI relocations. The addend doesn't really matter, since we
1897 envision that this will only be used to check whether the symbol
1898 is mapped to the same segment as the got. */
1900 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1902 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1905 /* Whether we need a PLT entry for a symbol. Should be implied by
1907 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1909 /* Whether a function descriptor should be created in this link unit
1910 for symbol+addend. Should be implied by something like:
1911 (plt || fdgotoff17m4 || fdgotofflohi
1912 || ((fd || fdgot17m4 || fdgothilo)
1913 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1915 /* Whether a lazy PLT entry is needed for this symbol+addend.
1916 Should be implied by something like:
1917 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1918 && ! (info->flags & DF_BIND_NOW)) */
1920 /* Whether we've already emitted GOT relocations and PLT entries as
1921 needed for this symbol. */
1924 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1925 relocations referencing the symbol. */
1926 unsigned relocs32, relocsfd, relocsfdv;
1928 /* The number of .rofixups entries and dynamic relocations allocated
1929 for this symbol, minus any that might have already been used. */
1930 unsigned fixups, dynrelocs;
1932 /* The offsets of the GOT entries assigned to symbol+addend, to the
1933 function descriptor's address, and to a function descriptor,
1934 respectively. Should be zero if unassigned. The offsets are
1935 counted from the value that will be assigned to the PIC register,
1936 not from the beginning of the .got section. */
1937 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1938 /* The offsets of the PLT entries assigned to symbol+addend,
1939 non-lazy and lazy, respectively. If unassigned, should be
1941 bfd_vma plt_entry, lzplt_entry;
1944 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1946 bfinfdpic_relocs_info_hash (const void *entry_)
1948 const struct bfinfdpic_relocs_info *entry = entry_;
1950 return (entry->symndx == -1
1951 ? (long) entry->d.h->root.root.hash
1952 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1955 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1958 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1960 const struct bfinfdpic_relocs_info *e1 = entry1;
1961 const struct bfinfdpic_relocs_info *e2 = entry2;
1963 return e1->symndx == e2->symndx && e1->addend == e2->addend
1964 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1967 /* Find or create an entry in a hash table HT that matches the key
1968 fields of the given ENTRY. If it's not found, memory for a new
1969 entry is allocated in ABFD's obstack. */
1970 static struct bfinfdpic_relocs_info *
1971 bfinfdpic_relocs_info_find (struct htab *ht,
1973 const struct bfinfdpic_relocs_info *entry,
1974 enum insert_option insert)
1976 struct bfinfdpic_relocs_info **loc;
1981 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1989 *loc = bfd_zalloc (abfd, sizeof (**loc));
1994 (*loc)->symndx = entry->symndx;
1995 (*loc)->d = entry->d;
1996 (*loc)->addend = entry->addend;
1997 (*loc)->plt_entry = (bfd_vma)-1;
1998 (*loc)->lzplt_entry = (bfd_vma)-1;
2003 /* Obtain the address of the entry in HT associated with H's symbol +
2004 addend, creating a new entry if none existed. ABFD is only used
2005 for memory allocation purposes. */
2006 inline static struct bfinfdpic_relocs_info *
2007 bfinfdpic_relocs_info_for_global (struct htab *ht,
2009 struct elf_link_hash_entry *h,
2011 enum insert_option insert)
2013 struct bfinfdpic_relocs_info entry;
2017 entry.addend = addend;
2019 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2022 /* Obtain the address of the entry in HT associated with the SYMNDXth
2023 local symbol of the input bfd ABFD, plus the addend, creating a new
2024 entry if none existed. */
2025 inline static struct bfinfdpic_relocs_info *
2026 bfinfdpic_relocs_info_for_local (struct htab *ht,
2030 enum insert_option insert)
2032 struct bfinfdpic_relocs_info entry;
2034 entry.symndx = symndx;
2035 entry.d.abfd = abfd;
2036 entry.addend = addend;
2038 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2041 /* Merge fields set by check_relocs() of two entries that end up being
2042 mapped to the same (presumably global) symbol. */
2045 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2046 struct bfinfdpic_relocs_info const *e1)
2048 e2->got17m4 |= e1->got17m4;
2049 e2->gothilo |= e1->gothilo;
2051 e2->fdgot17m4 |= e1->fdgot17m4;
2052 e2->fdgothilo |= e1->fdgothilo;
2053 e2->fdgoff17m4 |= e1->fdgoff17m4;
2054 e2->fdgoffhilo |= e1->fdgoffhilo;
2055 e2->gotoff |= e1->gotoff;
2056 e2->call |= e1->call;
2060 /* Every block of 65535 lazy PLT entries shares a single call to the
2061 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2062 32767, counting from 0). All other lazy PLT entries branch to it
2063 in a single instruction. */
2065 #define LZPLT_RESOLVER_EXTRA 10
2066 #define LZPLT_NORMAL_SIZE 6
2067 #define LZPLT_ENTRIES 1362
2069 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2070 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2072 /* Add a dynamic relocation to the SRELOC section. */
2074 inline static bfd_vma
2075 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2076 int reloc_type, long dynindx, bfd_vma addend,
2077 struct bfinfdpic_relocs_info *entry)
2079 Elf_Internal_Rela outrel;
2080 bfd_vma reloc_offset;
2082 outrel.r_offset = offset;
2083 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2084 outrel.r_addend = addend;
2086 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2087 BFD_ASSERT (reloc_offset < sreloc->size);
2088 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2089 sreloc->contents + reloc_offset);
2090 sreloc->reloc_count++;
2092 /* If the entry's index is zero, this relocation was probably to a
2093 linkonce section that got discarded. We reserved a dynamic
2094 relocation, but it was for another entry than the one we got at
2095 the time of emitting the relocation. Unfortunately there's no
2096 simple way for us to catch this situation, since the relocation
2097 is cleared right before calling relocate_section, at which point
2098 we no longer know what the relocation used to point to. */
2101 BFD_ASSERT (entry->dynrelocs > 0);
2105 return reloc_offset;
2108 /* Add a fixup to the ROFIXUP section. */
2111 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2112 struct bfinfdpic_relocs_info *entry)
2114 bfd_vma fixup_offset;
2116 if (rofixup->flags & SEC_EXCLUDE)
2119 fixup_offset = rofixup->reloc_count * 4;
2120 if (rofixup->contents)
2122 BFD_ASSERT (fixup_offset < rofixup->size);
2123 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2125 rofixup->reloc_count++;
2127 if (entry && entry->symndx)
2129 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2131 BFD_ASSERT (entry->fixups > 0);
2135 return fixup_offset;
2138 /* Find the segment number in which OSEC, and output section, is
2142 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2144 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2146 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2149 inline static bfd_boolean
2150 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2152 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2154 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2157 /* Generate relocations for GOT entries, function descriptors, and
2158 code for PLT and lazy PLT entries. */
2160 inline static bfd_boolean
2161 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2163 struct bfd_link_info *info,
2165 Elf_Internal_Sym *sym,
2168 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1;
2175 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2177 /* If the symbol is dynamic, consider it for dynamic
2178 relocations, otherwise decay to section + offset. */
2179 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2180 dynindx = entry->d.h->dynindx;
2184 && sec->output_section
2185 && ! bfd_is_abs_section (sec->output_section)
2186 && ! bfd_is_und_section (sec->output_section))
2187 dynindx = elf_section_data (sec->output_section)->dynindx;
2193 /* Generate relocation for GOT entry pointing to the symbol. */
2194 if (entry->got_entry)
2197 bfd_vma ad = addend;
2199 /* If the symbol is dynamic but binds locally, use
2201 if (sec && (entry->symndx != -1
2202 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2204 if (entry->symndx == -1)
2205 ad += entry->d.h->root.u.def.value;
2207 ad += sym->st_value;
2208 ad += sec->output_offset;
2209 if (sec->output_section && elf_section_data (sec->output_section))
2210 idx = elf_section_data (sec->output_section)->dynindx;
2215 /* If we're linking an executable at a fixed address, we can
2216 omit the dynamic relocation as long as the symbol is local to
2218 if (bfd_link_pde (info)
2219 && (entry->symndx != -1
2220 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2223 ad += sec->output_section->vma;
2224 if (entry->symndx != -1
2225 || entry->d.h->root.type != bfd_link_hash_undefweak)
2226 _bfinfdpic_add_rofixup (output_bfd,
2227 bfinfdpic_gotfixup_section (info),
2228 bfinfdpic_got_section (info)->output_section
2230 + bfinfdpic_got_section (info)->output_offset
2231 + bfinfdpic_got_initial_offset (info)
2232 + entry->got_entry, entry);
2235 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2236 _bfd_elf_section_offset
2238 bfinfdpic_got_section (info),
2239 bfinfdpic_got_initial_offset (info)
2241 + bfinfdpic_got_section (info)
2242 ->output_section->vma
2243 + bfinfdpic_got_section (info)->output_offset,
2244 R_BFIN_BYTE4_DATA, idx, ad, entry);
2246 bfd_put_32 (output_bfd, ad,
2247 bfinfdpic_got_section (info)->contents
2248 + bfinfdpic_got_initial_offset (info)
2249 + entry->got_entry);
2252 /* Generate relocation for GOT entry pointing to a canonical
2253 function descriptor. */
2254 if (entry->fdgot_entry)
2259 if (! (entry->symndx == -1
2260 && entry->d.h->root.type == bfd_link_hash_undefweak
2261 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2263 /* If the symbol is dynamic and there may be dynamic symbol
2264 resolution because we are, or are linked with, a shared
2265 library, emit a FUNCDESC relocation such that the dynamic
2266 linker will allocate the function descriptor. If the
2267 symbol needs a non-local function descriptor but binds
2268 locally (e.g., its visibility is protected, emit a
2269 dynamic relocation decayed to section+offset. */
2270 if (entry->symndx == -1
2271 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2272 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2273 && !bfd_link_pde (info))
2275 reloc = R_BFIN_FUNCDESC;
2276 idx = elf_section_data (entry->d.h->root.u.def.section
2277 ->output_section)->dynindx;
2278 ad = entry->d.h->root.u.def.section->output_offset
2279 + entry->d.h->root.u.def.value;
2281 else if (entry->symndx == -1
2282 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2284 reloc = R_BFIN_FUNCDESC;
2292 /* Otherwise, we know we have a private function descriptor,
2293 so reference it directly. */
2294 if (elf_hash_table (info)->dynamic_sections_created)
2295 BFD_ASSERT (entry->privfd);
2296 reloc = R_BFIN_BYTE4_DATA;
2297 idx = elf_section_data (bfinfdpic_got_section (info)
2298 ->output_section)->dynindx;
2299 ad = bfinfdpic_got_section (info)->output_offset
2300 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2303 /* If there is room for dynamic symbol resolution, emit the
2304 dynamic relocation. However, if we're linking an
2305 executable at a fixed location, we won't have emitted a
2306 dynamic symbol entry for the got section, so idx will be
2307 zero, which means we can and should compute the address
2308 of the private descriptor ourselves. */
2309 if (bfd_link_pde (info)
2310 && (entry->symndx != -1
2311 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2313 ad += bfinfdpic_got_section (info)->output_section->vma;
2314 _bfinfdpic_add_rofixup (output_bfd,
2315 bfinfdpic_gotfixup_section (info),
2316 bfinfdpic_got_section (info)
2317 ->output_section->vma
2318 + bfinfdpic_got_section (info)
2320 + bfinfdpic_got_initial_offset (info)
2321 + entry->fdgot_entry, entry);
2324 _bfinfdpic_add_dyn_reloc (output_bfd,
2325 bfinfdpic_gotrel_section (info),
2326 _bfd_elf_section_offset
2328 bfinfdpic_got_section (info),
2329 bfinfdpic_got_initial_offset (info)
2330 + entry->fdgot_entry)
2331 + bfinfdpic_got_section (info)
2332 ->output_section->vma
2333 + bfinfdpic_got_section (info)
2335 reloc, idx, ad, entry);
2338 bfd_put_32 (output_bfd, ad,
2339 bfinfdpic_got_section (info)->contents
2340 + bfinfdpic_got_initial_offset (info)
2341 + entry->fdgot_entry);
2344 /* Generate relocation to fill in a private function descriptor in
2346 if (entry->fd_entry)
2349 bfd_vma ad = addend;
2351 long lowword, highword;
2353 /* If the symbol is dynamic but binds locally, use
2355 if (sec && (entry->symndx != -1
2356 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2358 if (entry->symndx == -1)
2359 ad += entry->d.h->root.u.def.value;
2361 ad += sym->st_value;
2362 ad += sec->output_offset;
2363 if (sec->output_section && elf_section_data (sec->output_section))
2364 idx = elf_section_data (sec->output_section)->dynindx;
2369 /* If we're linking an executable at a fixed address, we can
2370 omit the dynamic relocation as long as the symbol is local to
2372 if (bfd_link_pde (info)
2373 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2376 ad += sec->output_section->vma;
2378 if (entry->symndx != -1
2379 || entry->d.h->root.type != bfd_link_hash_undefweak)
2381 _bfinfdpic_add_rofixup (output_bfd,
2382 bfinfdpic_gotfixup_section (info),
2383 bfinfdpic_got_section (info)
2384 ->output_section->vma
2385 + bfinfdpic_got_section (info)
2387 + bfinfdpic_got_initial_offset (info)
2388 + entry->fd_entry, entry);
2389 _bfinfdpic_add_rofixup (output_bfd,
2390 bfinfdpic_gotfixup_section (info),
2391 bfinfdpic_got_section (info)
2392 ->output_section->vma
2393 + bfinfdpic_got_section (info)
2395 + bfinfdpic_got_initial_offset (info)
2396 + entry->fd_entry + 4, entry);
2402 = _bfinfdpic_add_dyn_reloc (output_bfd,
2404 ? bfinfdpic_pltrel_section (info)
2405 : bfinfdpic_gotrel_section (info),
2406 _bfd_elf_section_offset
2408 bfinfdpic_got_section (info),
2409 bfinfdpic_got_initial_offset (info)
2411 + bfinfdpic_got_section (info)
2412 ->output_section->vma
2413 + bfinfdpic_got_section (info)
2415 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2418 /* If we've omitted the dynamic relocation, just emit the fixed
2419 addresses of the symbol and of the local GOT base offset. */
2420 if (bfd_link_pde (info)
2422 && sec->output_section)
2425 highword = bfinfdpic_got_section (info)->output_section->vma
2426 + bfinfdpic_got_section (info)->output_offset
2427 + bfinfdpic_got_initial_offset (info);
2429 else if (entry->lazyplt)
2434 fd_lazy_rel_offset = ofst;
2436 /* A function descriptor used for lazy or local resolving is
2437 initialized such that its high word contains the output
2438 section index in which the PLT entries are located, and
2439 the low word contains the address of the lazy PLT entry
2440 entry point, that must be within the memory region
2441 assigned to that section. */
2442 lowword = entry->lzplt_entry + 4
2443 + bfinfdpic_plt_section (info)->output_offset
2444 + bfinfdpic_plt_section (info)->output_section->vma;
2445 highword = _bfinfdpic_osec_to_segment
2446 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2450 /* A function descriptor for a local function gets the index
2451 of the section. For a non-local function, it's
2455 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2456 && entry->d.h->dynindx == idx))
2459 highword = _bfinfdpic_osec_to_segment
2460 (output_bfd, sec->output_section);
2463 bfd_put_32 (output_bfd, lowword,
2464 bfinfdpic_got_section (info)->contents
2465 + bfinfdpic_got_initial_offset (info)
2467 bfd_put_32 (output_bfd, highword,
2468 bfinfdpic_got_section (info)->contents
2469 + bfinfdpic_got_initial_offset (info)
2470 + entry->fd_entry + 4);
2473 /* Generate code for the PLT entry. */
2474 if (entry->plt_entry != (bfd_vma) -1)
2476 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2479 BFD_ASSERT (entry->fd_entry);
2481 /* Figure out what kind of PLT entry we need, depending on the
2482 location of the function descriptor within the GOT. */
2483 if (entry->fd_entry >= -(1 << (18 - 1))
2484 && entry->fd_entry + 4 < (1 << (18 - 1)))
2486 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2487 bfd_put_32 (output_bfd,
2488 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2490 bfd_put_32 (output_bfd,
2491 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2497 /* P1.L = fd_entry; P1.H = fd_entry;
2501 bfd_put_32 (output_bfd,
2502 0xe109 | (entry->fd_entry << 16),
2504 bfd_put_32 (output_bfd,
2505 0xe149 | (entry->fd_entry & 0xFFFF0000),
2507 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2508 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2509 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2513 bfd_put_16 (output_bfd, 0x0051, plt_code);
2516 /* Generate code for the lazy PLT entry. */
2517 if (entry->lzplt_entry != (bfd_vma) -1)
2519 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2520 + entry->lzplt_entry;
2521 bfd_vma resolverStub_addr;
2523 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2526 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2527 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2528 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2529 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2531 if (entry->lzplt_entry == resolverStub_addr)
2533 /* This is a lazy PLT entry that includes a resolver call.
2537 bfd_put_32 (output_bfd,
2540 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2544 /* JUMP.S resolverStub */
2545 bfd_put_16 (output_bfd,
2547 | (((resolverStub_addr - entry->lzplt_entry)
2548 / 2) & (((bfd_vma)1 << 12) - 1)),
2556 /* Relocate an Blackfin ELF section.
2558 The RELOCATE_SECTION function is called by the new ELF backend linker
2559 to handle the relocations for a section.
2561 The relocs are always passed as Rela structures; if the section
2562 actually uses Rel structures, the r_addend field will always be
2565 This function is responsible for adjusting the section contents as
2566 necessary, and (if using Rela relocs and generating a relocatable
2567 output file) adjusting the reloc addend as necessary.
2569 This function does not have to worry about setting the reloc
2570 address or the reloc symbol index.
2572 LOCAL_SYMS is a pointer to the swapped in local symbols.
2574 LOCAL_SECTIONS is an array giving the section in the input file
2575 corresponding to the st_shndx field of each local symbol.
2577 The global hash table entry for the global symbols can be found
2578 via elf_sym_hashes (input_bfd).
2580 When generating relocatable output, this function must handle
2581 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2582 going to be the section symbol corresponding to the output
2583 section, which means that the addend must be adjusted
2587 bfinfdpic_relocate_section (bfd * output_bfd,
2588 struct bfd_link_info *info,
2590 asection * input_section,
2591 bfd_byte * contents,
2592 Elf_Internal_Rela * relocs,
2593 Elf_Internal_Sym * local_syms,
2594 asection ** local_sections)
2596 Elf_Internal_Shdr *symtab_hdr;
2597 struct elf_link_hash_entry **sym_hashes;
2598 Elf_Internal_Rela *rel;
2599 Elf_Internal_Rela *relend;
2600 unsigned isec_segment, got_segment, plt_segment,
2602 int silence_segment_error = !bfd_link_pic (info);
2604 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2605 sym_hashes = elf_sym_hashes (input_bfd);
2606 relend = relocs + input_section->reloc_count;
2608 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2609 input_section->output_section);
2610 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2611 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2612 bfinfdpic_got_section (info)
2616 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2617 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2618 bfinfdpic_plt_section (info)
2623 for (rel = relocs; rel < relend; rel ++)
2625 reloc_howto_type *howto;
2626 unsigned long r_symndx;
2627 Elf_Internal_Sym *sym;
2629 struct elf_link_hash_entry *h;
2631 bfd_reloc_status_type r;
2632 const char * name = NULL;
2635 struct bfinfdpic_relocs_info *picrel;
2636 bfd_vma orig_addend = rel->r_addend;
2638 r_type = ELF32_R_TYPE (rel->r_info);
2640 if (r_type == R_BFIN_GNU_VTINHERIT
2641 || r_type == R_BFIN_GNU_VTENTRY)
2644 r_symndx = ELF32_R_SYM (rel->r_info);
2645 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2648 bfd_set_error (bfd_error_bad_value);
2656 if (r_symndx < symtab_hdr->sh_info)
2658 sym = local_syms + r_symndx;
2659 osec = sec = local_sections [r_symndx];
2660 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2662 name = bfd_elf_string_from_elf_section
2663 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2664 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2668 bfd_boolean warned, ignored;
2669 bfd_boolean unresolved_reloc;
2671 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2672 r_symndx, symtab_hdr, sym_hashes,
2674 unresolved_reloc, warned, ignored);
2678 if (sec != NULL && discarded_section (sec))
2679 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2680 rel, 1, relend, howto, 0, contents);
2682 if (bfd_link_relocatable (info))
2686 && (h->root.type == bfd_link_hash_defined
2687 || h->root.type == bfd_link_hash_defweak)
2688 && !BFINFDPIC_SYM_LOCAL (info, h))
2696 case R_BFIN_PCREL24:
2697 case R_BFIN_PCREL24_JUMP_L:
2698 case R_BFIN_BYTE4_DATA:
2699 if (! IS_FDPIC (output_bfd))
2702 case R_BFIN_GOT17M4:
2705 case R_BFIN_FUNCDESC_GOT17M4:
2706 case R_BFIN_FUNCDESC_GOTHI:
2707 case R_BFIN_FUNCDESC_GOTLO:
2708 case R_BFIN_GOTOFF17M4:
2709 case R_BFIN_GOTOFFHI:
2710 case R_BFIN_GOTOFFLO:
2711 case R_BFIN_FUNCDESC_GOTOFF17M4:
2712 case R_BFIN_FUNCDESC_GOTOFFHI:
2713 case R_BFIN_FUNCDESC_GOTOFFLO:
2714 case R_BFIN_FUNCDESC:
2715 case R_BFIN_FUNCDESC_VALUE:
2717 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2718 (info), input_bfd, h,
2719 orig_addend, INSERT);
2721 /* In order to find the entry we created before, we must
2722 use the original addend, not the one that may have been
2723 modified by _bfd_elf_rela_local_sym(). */
2724 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2725 (info), input_bfd, r_symndx,
2726 orig_addend, INSERT);
2730 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2734 (*_bfd_error_handler)
2735 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2736 input_bfd, input_section, rel->r_offset, name);
2746 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2747 && _bfd_elf_section_offset (output_bfd, info, input_section,
2748 rel->r_offset) != (bfd_vma) -1)
2750 info->callbacks->warning
2751 (info, _("relocation references symbol not defined in the module"),
2752 name, input_bfd, input_section, rel->r_offset);
2760 case R_BFIN_PCREL24:
2761 case R_BFIN_PCREL24_JUMP_L:
2762 check_segment[0] = isec_segment;
2763 if (! IS_FDPIC (output_bfd))
2764 check_segment[1] = isec_segment;
2765 else if (picrel->plt)
2767 relocation = bfinfdpic_plt_section (info)->output_section->vma
2768 + bfinfdpic_plt_section (info)->output_offset
2769 + picrel->plt_entry;
2770 check_segment[1] = plt_segment;
2772 /* We don't want to warn on calls to undefined weak symbols,
2773 as calls to them must be protected by non-NULL tests
2774 anyway, and unprotected calls would invoke undefined
2776 else if (picrel->symndx == -1
2777 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2778 check_segment[1] = check_segment[0];
2780 check_segment[1] = sec
2781 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2785 case R_BFIN_GOT17M4:
2788 relocation = picrel->got_entry;
2789 check_segment[0] = check_segment[1] = got_segment;
2792 case R_BFIN_FUNCDESC_GOT17M4:
2793 case R_BFIN_FUNCDESC_GOTHI:
2794 case R_BFIN_FUNCDESC_GOTLO:
2795 relocation = picrel->fdgot_entry;
2796 check_segment[0] = check_segment[1] = got_segment;
2799 case R_BFIN_GOTOFFHI:
2800 case R_BFIN_GOTOFF17M4:
2801 case R_BFIN_GOTOFFLO:
2802 relocation -= bfinfdpic_got_section (info)->output_section->vma
2803 + bfinfdpic_got_section (info)->output_offset
2804 + bfinfdpic_got_initial_offset (info);
2805 check_segment[0] = got_segment;
2806 check_segment[1] = sec
2807 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2811 case R_BFIN_FUNCDESC_GOTOFF17M4:
2812 case R_BFIN_FUNCDESC_GOTOFFHI:
2813 case R_BFIN_FUNCDESC_GOTOFFLO:
2814 relocation = picrel->fd_entry;
2815 check_segment[0] = check_segment[1] = got_segment;
2818 case R_BFIN_FUNCDESC:
2821 bfd_vma addend = rel->r_addend;
2823 if (! (h && h->root.type == bfd_link_hash_undefweak
2824 && BFINFDPIC_SYM_LOCAL (info, h)))
2826 /* If the symbol is dynamic and there may be dynamic
2827 symbol resolution because we are or are linked with a
2828 shared library, emit a FUNCDESC relocation such that
2829 the dynamic linker will allocate the function
2830 descriptor. If the symbol needs a non-local function
2831 descriptor but binds locally (e.g., its visibility is
2832 protected, emit a dynamic relocation decayed to
2834 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2835 && BFINFDPIC_SYM_LOCAL (info, h)
2836 && !bfd_link_pde (info))
2838 dynindx = elf_section_data (h->root.u.def.section
2839 ->output_section)->dynindx;
2840 addend += h->root.u.def.section->output_offset
2841 + h->root.u.def.value;
2843 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2847 info->callbacks->warning
2848 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2849 name, input_bfd, input_section, rel->r_offset);
2852 dynindx = h->dynindx;
2856 /* Otherwise, we know we have a private function
2857 descriptor, so reference it directly. */
2858 BFD_ASSERT (picrel->privfd);
2859 r_type = R_BFIN_BYTE4_DATA;
2860 dynindx = elf_section_data (bfinfdpic_got_section (info)
2861 ->output_section)->dynindx;
2862 addend = bfinfdpic_got_section (info)->output_offset
2863 + bfinfdpic_got_initial_offset (info)
2867 /* If there is room for dynamic symbol resolution, emit
2868 the dynamic relocation. However, if we're linking an
2869 executable at a fixed location, we won't have emitted a
2870 dynamic symbol entry for the got section, so idx will
2871 be zero, which means we can and should compute the
2872 address of the private descriptor ourselves. */
2873 if (bfd_link_pde (info)
2874 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2878 addend += bfinfdpic_got_section (info)->output_section->vma;
2879 if ((bfd_get_section_flags (output_bfd,
2880 input_section->output_section)
2881 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2883 if (_bfinfdpic_osec_readonly_p (output_bfd,
2887 info->callbacks->warning
2889 _("cannot emit fixups in read-only section"),
2890 name, input_bfd, input_section, rel->r_offset);
2894 offset = _bfd_elf_section_offset
2896 input_section, rel->r_offset);
2898 if (offset != (bfd_vma)-1)
2899 _bfinfdpic_add_rofixup (output_bfd,
2900 bfinfdpic_gotfixup_section
2902 offset + input_section
2903 ->output_section->vma
2904 + input_section->output_offset,
2908 else if ((bfd_get_section_flags (output_bfd,
2909 input_section->output_section)
2910 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2914 if (_bfinfdpic_osec_readonly_p (output_bfd,
2918 info->callbacks->warning
2920 _("cannot emit dynamic relocations in read-only section"),
2921 name, input_bfd, input_section, rel->r_offset);
2924 offset = _bfd_elf_section_offset (output_bfd, info,
2925 input_section, rel->r_offset);
2927 if (offset != (bfd_vma)-1)
2928 _bfinfdpic_add_dyn_reloc (output_bfd,
2929 bfinfdpic_gotrel_section (info),
2930 offset + input_section
2931 ->output_section->vma
2932 + input_section->output_offset,
2934 dynindx, addend, picrel);
2937 addend += bfinfdpic_got_section (info)->output_section->vma;
2940 /* We want the addend in-place because dynamic
2941 relocations are REL. Setting relocation to it should
2942 arrange for it to be installed. */
2943 relocation = addend - rel->r_addend;
2945 check_segment[0] = check_segment[1] = got_segment;
2948 case R_BFIN_BYTE4_DATA:
2949 if (! IS_FDPIC (output_bfd))
2951 check_segment[0] = check_segment[1] = -1;
2955 case R_BFIN_FUNCDESC_VALUE:
2958 bfd_vma addend = rel->r_addend;
2960 offset = _bfd_elf_section_offset (output_bfd, info,
2961 input_section, rel->r_offset);
2963 /* If the symbol is dynamic but binds locally, use
2965 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2967 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2969 info->callbacks->warning
2970 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2971 name, input_bfd, input_section, rel->r_offset);
2974 dynindx = h->dynindx;
2979 addend += h->root.u.def.value;
2981 addend += sym->st_value;
2983 addend += osec->output_offset;
2984 if (osec && osec->output_section
2985 && ! bfd_is_abs_section (osec->output_section)
2986 && ! bfd_is_und_section (osec->output_section))
2987 dynindx = elf_section_data (osec->output_section)->dynindx;
2992 /* If we're linking an executable at a fixed address, we
2993 can omit the dynamic relocation as long as the symbol
2994 is defined in the current link unit (which is implied
2995 by its output section not being NULL). */
2996 if (bfd_link_pde (info)
2997 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3000 addend += osec->output_section->vma;
3001 if (IS_FDPIC (input_bfd)
3002 && (bfd_get_section_flags (output_bfd,
3003 input_section->output_section)
3004 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3006 if (_bfinfdpic_osec_readonly_p (output_bfd,
3010 info->callbacks->warning
3012 _("cannot emit fixups in read-only section"),
3013 name, input_bfd, input_section, rel->r_offset);
3016 if (!h || h->root.type != bfd_link_hash_undefweak)
3018 if (offset != (bfd_vma)-1)
3020 _bfinfdpic_add_rofixup (output_bfd,
3021 bfinfdpic_gotfixup_section
3023 offset + input_section
3024 ->output_section->vma
3025 + input_section->output_offset,
3028 if (r_type == R_BFIN_FUNCDESC_VALUE)
3029 _bfinfdpic_add_rofixup
3031 bfinfdpic_gotfixup_section (info),
3032 offset + input_section->output_section->vma
3033 + input_section->output_offset + 4, picrel);
3040 if ((bfd_get_section_flags (output_bfd,
3041 input_section->output_section)
3042 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3044 if (_bfinfdpic_osec_readonly_p (output_bfd,
3048 info->callbacks->warning
3050 _("cannot emit dynamic relocations in read-only section"),
3051 name, input_bfd, input_section, rel->r_offset);
3055 if (offset != (bfd_vma)-1)
3056 _bfinfdpic_add_dyn_reloc (output_bfd,
3057 bfinfdpic_gotrel_section (info),
3059 + input_section->output_section->vma
3060 + input_section->output_offset,
3061 r_type, dynindx, addend, picrel);
3064 addend += osec->output_section->vma;
3065 /* We want the addend in-place because dynamic
3066 relocations are REL. Setting relocation to it
3067 should arrange for it to be installed. */
3068 relocation = addend - rel->r_addend;
3071 if (r_type == R_BFIN_FUNCDESC_VALUE)
3073 /* If we've omitted the dynamic relocation, just emit
3074 the fixed addresses of the symbol and of the local
3076 if (bfd_link_pde (info)
3077 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3078 bfd_put_32 (output_bfd,
3079 bfinfdpic_got_section (info)->output_section->vma
3080 + bfinfdpic_got_section (info)->output_offset
3081 + bfinfdpic_got_initial_offset (info),
3082 contents + rel->r_offset + 4);
3084 /* A function descriptor used for lazy or local
3085 resolving is initialized such that its high word
3086 contains the output section index in which the
3087 PLT entries are located, and the low word
3088 contains the offset of the lazy PLT entry entry
3089 point into that section. */
3090 bfd_put_32 (output_bfd,
3091 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3093 : _bfinfdpic_osec_to_segment (output_bfd,
3096 contents + rel->r_offset + 4);
3099 check_segment[0] = check_segment[1] = got_segment;
3103 check_segment[0] = isec_segment;
3104 check_segment[1] = sec
3105 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3110 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3112 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3113 in the ld testsuite. */
3114 /* This helps catch problems in GCC while we can't do more
3115 than static linking. The idea is to test whether the
3116 input file basename is crt0.o only once. */
3117 if (silence_segment_error == 1)
3118 silence_segment_error =
3119 (strlen (input_bfd->filename) == 6
3120 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3121 || (strlen (input_bfd->filename) > 6
3122 && filename_cmp (input_bfd->filename
3123 + strlen (input_bfd->filename) - 7,
3127 if (!silence_segment_error
3128 /* We don't want duplicate errors for undefined
3130 && !(picrel && picrel->symndx == -1
3131 && picrel->d.h->root.type == bfd_link_hash_undefined))
3132 info->callbacks->warning
3135 ? _("relocations between different segments are not supported")
3136 : _("warning: relocation references a different segment"),
3137 name, input_bfd, input_section, rel->r_offset);
3138 if (!silence_segment_error && bfd_link_pic (info))
3140 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3145 case R_BFIN_GOTOFFHI:
3146 /* We need the addend to be applied before we shift the
3148 relocation += rel->r_addend;
3151 case R_BFIN_FUNCDESC_GOTHI:
3152 case R_BFIN_FUNCDESC_GOTOFFHI:
3157 case R_BFIN_FUNCDESC_GOTLO:
3158 case R_BFIN_GOTOFFLO:
3159 case R_BFIN_FUNCDESC_GOTOFFLO:
3160 relocation &= 0xffff;
3169 case R_BFIN_PCREL24:
3170 case R_BFIN_PCREL24_JUMP_L:
3171 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3175 /* When referencing a GOT entry, a function descriptor or a
3176 PLT, we don't want the addend to apply to the reference,
3177 but rather to the referenced symbol. The actual entry
3178 will have already been created taking the addend into
3179 account, so cancel it out here. */
3180 case R_BFIN_GOT17M4:
3183 case R_BFIN_FUNCDESC_GOT17M4:
3184 case R_BFIN_FUNCDESC_GOTHI:
3185 case R_BFIN_FUNCDESC_GOTLO:
3186 case R_BFIN_FUNCDESC_GOTOFF17M4:
3187 case R_BFIN_FUNCDESC_GOTOFFHI:
3188 case R_BFIN_FUNCDESC_GOTOFFLO:
3189 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3190 here, since we do want to apply the addend to the others.
3191 Note that we've applied the addend to GOTOFFHI before we
3192 shifted it right. */
3193 case R_BFIN_GOTOFFHI:
3194 relocation -= rel->r_addend;
3201 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3202 contents, rel->r_offset,
3203 relocation, rel->r_addend);
3205 if (r != bfd_reloc_ok)
3207 const char * msg = (const char *) NULL;
3211 case bfd_reloc_overflow:
3212 r = info->callbacks->reloc_overflow
3213 (info, (h ? &h->root : NULL), name, howto->name,
3214 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3217 case bfd_reloc_undefined:
3218 r = info->callbacks->undefined_symbol
3219 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3222 case bfd_reloc_outofrange:
3223 msg = _("internal error: out of range error");
3226 case bfd_reloc_notsupported:
3227 msg = _("internal error: unsupported relocation error");
3230 case bfd_reloc_dangerous:
3231 msg = _("internal error: dangerous relocation");
3235 msg = _("internal error: unknown error");
3240 r = info->callbacks->warning
3241 (info, msg, name, input_bfd, input_section, rel->r_offset);
3251 /* Update the relocation information for the relocations of the section
3255 bfinfdpic_gc_sweep_hook (bfd *abfd,
3256 struct bfd_link_info *info,
3258 const Elf_Internal_Rela *relocs)
3260 Elf_Internal_Shdr *symtab_hdr;
3261 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3262 const Elf_Internal_Rela *rel;
3263 const Elf_Internal_Rela *rel_end;
3264 struct bfinfdpic_relocs_info *picrel;
3266 BFD_ASSERT (IS_FDPIC (abfd));
3268 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3269 sym_hashes = elf_sym_hashes (abfd);
3270 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3271 if (!elf_bad_symtab (abfd))
3272 sym_hashes_end -= symtab_hdr->sh_info;
3274 rel_end = relocs + sec->reloc_count;
3275 for (rel = relocs; rel < rel_end; rel++)
3277 struct elf_link_hash_entry *h;
3278 unsigned long r_symndx;
3280 r_symndx = ELF32_R_SYM (rel->r_info);
3281 if (r_symndx < symtab_hdr->sh_info)
3284 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3287 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3289 rel->r_addend, NO_INSERT);
3291 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3292 (info), abfd, r_symndx,
3293 rel->r_addend, NO_INSERT);
3298 switch (ELF32_R_TYPE (rel->r_info))
3300 case R_BFIN_PCREL24:
3301 case R_BFIN_PCREL24_JUMP_L:
3305 case R_BFIN_FUNCDESC_VALUE:
3306 picrel->relocsfdv--;
3307 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3311 case R_BFIN_BYTE4_DATA:
3313 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3317 case R_BFIN_GOT17M4:
3326 case R_BFIN_FUNCDESC_GOT17M4:
3327 picrel->fdgot17m4--;
3330 case R_BFIN_FUNCDESC_GOTHI:
3331 case R_BFIN_FUNCDESC_GOTLO:
3332 picrel->fdgothilo--;
3335 case R_BFIN_GOTOFF17M4:
3336 case R_BFIN_GOTOFFHI:
3337 case R_BFIN_GOTOFFLO:
3341 case R_BFIN_FUNCDESC_GOTOFF17M4:
3342 picrel->fdgoff17m4--;
3345 case R_BFIN_FUNCDESC_GOTOFFHI:
3346 case R_BFIN_FUNCDESC_GOTOFFLO:
3347 picrel->fdgoffhilo--;
3350 case R_BFIN_FUNCDESC:
3363 /* We need dynamic symbols for every section, since segments can
3364 relocate independently. */
3366 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3367 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3370 switch (elf_section_data (p)->this_hdr.sh_type)
3374 /* If sh_type is yet undecided, assume it could be
3375 SHT_PROGBITS/SHT_NOBITS. */
3379 /* There shouldn't be section relative relocations
3380 against any other section. */
3386 /* Create a .got section, as well as its additional info field. This
3387 is almost entirely copied from
3388 elflink.c:_bfd_elf_create_got_section(). */
3391 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3393 flagword flags, pltflags;
3395 struct elf_link_hash_entry *h;
3396 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3399 /* This function may be called more than once. */
3400 s = bfd_get_linker_section (abfd, ".got");
3404 /* Machine specific: although pointers are 32-bits wide, we want the
3405 GOT to be aligned to a 64-bit boundary, such that function
3406 descriptors in it can be accessed with 64-bit loads and
3410 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3411 | SEC_LINKER_CREATED);
3414 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3416 || !bfd_set_section_alignment (abfd, s, ptralign))
3419 if (bed->want_got_plt)
3421 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
3423 || !bfd_set_section_alignment (abfd, s, ptralign))
3427 if (bed->want_got_sym)
3429 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3430 (or .got.plt) section. We don't do this in the linker script
3431 because we don't want to define the symbol if we are not creating
3432 a global offset table. */
3433 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3434 elf_hash_table (info)->hgot = h;
3438 /* Machine-specific: we want the symbol for executables as
3440 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3444 /* The first bit of the global offset table is the header. */
3445 s->size += bed->got_header_size;
3447 /* This is the machine-specific part. Create and initialize section
3448 data for the got. */
3449 if (IS_FDPIC (abfd))
3451 bfinfdpic_got_section (info) = s;
3452 bfinfdpic_relocs_info (info) = htab_try_create (1,
3453 bfinfdpic_relocs_info_hash,
3454 bfinfdpic_relocs_info_eq,
3456 if (! bfinfdpic_relocs_info (info))
3459 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3460 (flags | SEC_READONLY));
3462 || ! bfd_set_section_alignment (abfd, s, 2))
3465 bfinfdpic_gotrel_section (info) = s;
3467 /* Machine-specific. */
3468 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3469 (flags | SEC_READONLY));
3471 || ! bfd_set_section_alignment (abfd, s, 2))
3474 bfinfdpic_gotfixup_section (info) = s;
3477 pltflags |= SEC_CODE;
3478 if (bed->plt_not_loaded)
3479 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3480 if (bed->plt_readonly)
3481 pltflags |= SEC_READONLY;
3483 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3485 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3487 /* Blackfin-specific: remember it. */
3488 bfinfdpic_plt_section (info) = s;
3490 if (bed->want_plt_sym)
3492 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3494 struct bfd_link_hash_entry *bh = NULL;
3496 if (! (_bfd_generic_link_add_one_symbol
3497 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3498 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3500 h = (struct elf_link_hash_entry *) bh;
3502 h->type = STT_OBJECT;
3504 if (! bfd_link_executable (info)
3505 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3509 /* Blackfin-specific: we want rel relocations for the plt. */
3510 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3511 flags | SEC_READONLY);
3513 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3515 /* Blackfin-specific: remember it. */
3516 bfinfdpic_pltrel_section (info) = s;
3521 /* Make sure the got and plt sections exist, and that our pointers in
3522 the link hash table point to them. */
3525 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3527 /* This is mostly copied from
3528 elflink.c:_bfd_elf_create_dynamic_sections(). */
3531 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3533 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3534 | SEC_LINKER_CREATED);
3536 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3537 .rel[a].bss sections. */
3539 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3540 if (! _bfin_create_got_section (abfd, info))
3543 /* Blackfin-specific: make sure we created everything we wanted. */
3544 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3545 /* && bfinfdpic_gotfixup_section (info) */
3546 && bfinfdpic_plt_section (info)
3547 && bfinfdpic_pltrel_section (info));
3549 if (bed->want_dynbss)
3551 /* The .dynbss section is a place to put symbols which are defined
3552 by dynamic objects, are referenced by regular objects, and are
3553 not functions. We must allocate space for them in the process
3554 image and use a R_*_COPY reloc to tell the dynamic linker to
3555 initialize them at run time. The linker script puts the .dynbss
3556 section into the .bss section of the final image. */
3557 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3558 SEC_ALLOC | SEC_LINKER_CREATED);
3562 /* The .rel[a].bss section holds copy relocs. This section is not
3563 normally needed. We need to create it here, though, so that the
3564 linker will map it to an output section. We can't just create it
3565 only if we need it, because we will not know whether we need it
3566 until we have seen all the input files, and the first time the
3567 main linker code calls BFD after examining all the input files
3568 (size_dynamic_sections) the input sections have already been
3569 mapped to the output sections. If the section turns out not to
3570 be needed, we can discard it later. We will never need this
3571 section when generating a shared object, since they do not use
3573 if (! bfd_link_pic (info))
3575 s = bfd_make_section_anyway_with_flags (abfd,
3577 flags | SEC_READONLY);
3579 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3587 /* Compute the total GOT size required by each symbol in each range.
3588 Symbols may require up to 4 words in the GOT: an entry pointing to
3589 the symbol, an entry pointing to its function descriptor, and a
3590 private function descriptors taking two words. */
3593 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3594 struct _bfinfdpic_dynamic_got_info *dinfo)
3596 /* Allocate space for a GOT entry pointing to the symbol. */
3598 dinfo->got17m4 += 4;
3599 else if (entry->gothilo)
3600 dinfo->gothilo += 4;
3605 /* Allocate space for a GOT entry pointing to the function
3607 if (entry->fdgot17m4)
3608 dinfo->got17m4 += 4;
3609 else if (entry->fdgothilo)
3610 dinfo->gothilo += 4;
3615 /* Decide whether we need a PLT entry, a function descriptor in the
3616 GOT, and a lazy PLT entry for this symbol. */
3617 entry->plt = entry->call
3618 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3619 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3620 entry->privfd = entry->plt
3621 || entry->fdgoff17m4 || entry->fdgoffhilo
3622 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3623 && (entry->symndx != -1
3624 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3625 entry->lazyplt = entry->privfd
3626 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3627 && ! (dinfo->info->flags & DF_BIND_NOW)
3628 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3630 /* Allocate space for a function descriptor. */
3631 if (entry->fdgoff17m4)
3633 else if (entry->privfd && entry->plt)
3635 else if (entry->privfd)
3642 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3645 /* Compute the number of dynamic relocations and fixups that a symbol
3646 requires, and add (or subtract) from the grand and per-symbol
3650 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3651 struct _bfinfdpic_dynamic_got_info *dinfo,
3652 bfd_boolean subtract)
3654 bfd_vma relocs = 0, fixups = 0;
3656 if (!bfd_link_pde (dinfo->info))
3657 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3660 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3662 if (entry->symndx != -1
3663 || entry->d.h->root.type != bfd_link_hash_undefweak)
3664 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3667 relocs += entry->relocs32 + entry->relocsfdv;
3669 if (entry->symndx != -1
3670 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3672 if (entry->symndx != -1
3673 || entry->d.h->root.type != bfd_link_hash_undefweak)
3674 fixups += entry->relocsfd;
3677 relocs += entry->relocsfd;
3686 entry->dynrelocs += relocs;
3687 entry->fixups += fixups;
3688 dinfo->relocs += relocs;
3689 dinfo->fixups += fixups;
3692 /* Compute the total GOT and PLT size required by each symbol in each range. *
3693 Symbols may require up to 4 words in the GOT: an entry pointing to
3694 the symbol, an entry pointing to its function descriptor, and a
3695 private function descriptors taking two words. */
3698 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3700 struct bfinfdpic_relocs_info *entry = *entryp;
3701 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3703 _bfinfdpic_count_nontls_entries (entry, dinfo);
3705 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3710 /* This structure is used to assign offsets to got entries, function
3711 descriptors, plt entries and lazy plt entries. */
3713 struct _bfinfdpic_dynamic_got_plt_info
3715 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3716 struct _bfinfdpic_dynamic_got_info g;
3718 /* For each addressable range, we record a MAX (positive) and MIN
3719 (negative) value. CUR is used to assign got entries, and it's
3720 incremented from an initial positive value to MAX, then from MIN
3721 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3722 assign function descriptors, and it's decreased from an initial
3723 non-positive value to MIN, then from MAX down to CUR (unless CUR
3724 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3725 to even words. ODD, if non-zero, indicates an odd word to be
3726 used for the next got entry, otherwise CUR is used and
3727 incremented by a pair of words, wrapping around when it reaches
3728 MAX. FDCUR is decremented (and wrapped) before the next function
3729 descriptor is chosen. FDPLT indicates the number of remaining
3730 slots that can be used for function descriptors used only by PLT
3732 struct _bfinfdpic_dynamic_got_alloc_data
3734 bfd_signed_vma max, cur, odd, fdcur, min;
3739 /* Determine the positive and negative ranges to be used by each
3740 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3741 double-word boundary, are the minimum (negative) and maximum
3742 (positive) GOT offsets already used by previous ranges, except for
3743 an ODD entry that may have been left behind. GOT and FD indicate
3744 the size of GOT entries and function descriptors that must be
3745 placed within the range from -WRAP to WRAP. If there's room left,
3746 up to FDPLT bytes should be reserved for additional function
3749 inline static bfd_signed_vma
3750 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3751 bfd_signed_vma fdcur,
3759 bfd_signed_vma wrapmin = -wrap;
3761 /* Start at the given initial points. */
3765 /* If we had an incoming odd word and we have any got entries that
3766 are going to use it, consume it, otherwise leave gad->odd at
3767 zero. We might force gad->odd to zero and return the incoming
3768 odd such that it is used by the next range, but then GOT entries
3769 might appear to be out of order and we wouldn't be able to
3770 shorten the GOT by one word if it turns out to end with an
3771 unpaired GOT entry. */
3781 /* If we're left with an unpaired GOT entry, compute its location
3782 such that we can return it. Otherwise, if got doesn't require an
3783 odd number of words here, either odd was already zero in the
3784 block above, or it was set to zero because got was non-zero, or
3785 got was already zero. In the latter case, we want the value of
3786 odd to carry over to the return statement, so we don't want to
3787 reset odd unless the condition below is true. */
3794 /* Compute the tentative boundaries of this range. */
3795 gad->max = cur + got;
3796 gad->min = fdcur - fd;
3799 /* If function descriptors took too much space, wrap some of them
3801 if (gad->min < wrapmin)
3803 gad->max += wrapmin - gad->min;
3806 /* If there is space left and we have function descriptors
3807 referenced in PLT entries that could take advantage of shorter
3808 offsets, place them here. */
3809 else if (fdplt && gad->min > wrapmin)
3812 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3813 fds = gad->min - wrapmin;
3822 /* If GOT entries took too much space, wrap some of them around.
3823 This may well cause gad->min to become lower than wrapmin. This
3824 will cause a relocation overflow later on, so we don't have to
3826 if ((bfd_vma) gad->max > wrap)
3828 gad->min -= gad->max - wrap;
3831 /* If there is more space left, try to place some more function
3832 descriptors for PLT entries. */
3833 else if (fdplt && (bfd_vma) gad->max < wrap)
3836 if ((bfd_vma) (wrap - gad->max) < fdplt)
3837 fds = wrap - gad->max;
3846 /* If odd was initially computed as an offset past the wrap point,
3849 odd = gad->min + odd - gad->max;
3851 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3852 before returning, so do it here too. This guarantees that,
3853 should cur and fdcur meet at the wrap point, they'll both be
3855 if (gad->cur == gad->max)
3856 gad->cur = gad->min;
3861 /* Compute the location of the next GOT entry, given the allocation
3862 data for a range. */
3864 inline static bfd_signed_vma
3865 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3871 /* If there was an odd word left behind, use it. */
3877 /* Otherwise, use the word pointed to by cur, reserve the next
3878 as an odd word, and skip to the next pair of words, possibly
3881 gad->odd = gad->cur + 4;
3883 if (gad->cur == gad->max)
3884 gad->cur = gad->min;
3890 /* Compute the location of the next function descriptor entry in the
3891 GOT, given the allocation data for a range. */
3893 inline static bfd_signed_vma
3894 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3896 /* If we're at the bottom, wrap around, and only then allocate the
3897 next pair of words. */
3898 if (gad->fdcur == gad->min)
3899 gad->fdcur = gad->max;
3900 return gad->fdcur -= 8;
3903 /* Assign GOT offsets for every GOT entry and function descriptor.
3904 Doing everything in a single pass is tricky. */
3907 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3909 struct bfinfdpic_relocs_info *entry = *entryp;
3910 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3913 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3914 else if (entry->gothilo)
3915 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3917 if (entry->fdgot17m4)
3918 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3919 else if (entry->fdgothilo)
3920 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3922 if (entry->fdgoff17m4)
3923 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3924 else if (entry->plt && dinfo->got17m4.fdplt)
3926 dinfo->got17m4.fdplt -= 8;
3927 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3929 else if (entry->plt)
3931 dinfo->gothilo.fdplt -= 8;
3932 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3934 else if (entry->privfd)
3935 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3940 /* Assign GOT offsets to private function descriptors used by PLT
3941 entries (or referenced by 32-bit offsets), as well as PLT entries
3942 and lazy PLT entries. */
3945 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3947 struct bfinfdpic_relocs_info *entry = *entryp;
3948 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3950 /* If this symbol requires a local function descriptor, allocate
3952 if (entry->privfd && entry->fd_entry == 0)
3954 if (dinfo->got17m4.fdplt)
3956 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3957 dinfo->got17m4.fdplt -= 8;
3961 BFD_ASSERT (dinfo->gothilo.fdplt);
3962 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3963 dinfo->gothilo.fdplt -= 8;
3971 /* We use the section's raw size to mark the location of the
3973 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3975 /* Figure out the length of this PLT entry based on the
3976 addressing mode we need to reach the function descriptor. */
3977 BFD_ASSERT (entry->fd_entry);
3978 if (entry->fd_entry >= -(1 << (18 - 1))
3979 && entry->fd_entry + 4 < (1 << (18 - 1)))
3984 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3989 entry->lzplt_entry = dinfo->g.lzplt;
3990 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3991 /* If this entry is the one that gets the resolver stub, account
3992 for the additional instruction. */
3993 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3994 == BFINFDPIC_LZPLT_RESOLV_LOC)
3995 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
4001 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
4002 _bfinfdpic_assign_plt_entries. */
4005 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
4007 struct bfinfdpic_relocs_info *entry = *entryp;
4009 entry->got_entry = 0;
4010 entry->fdgot_entry = 0;
4011 entry->fd_entry = 0;
4012 entry->plt_entry = (bfd_vma)-1;
4013 entry->lzplt_entry = (bfd_vma)-1;
4018 /* Follow indirect and warning hash entries so that each got entry
4019 points to the final symbol definition. P must point to a pointer
4020 to the hash table we're traversing. Since this traversal may
4021 modify the hash table, we set this pointer to NULL to indicate
4022 we've made a potentially-destructive change to the hash table, so
4023 the traversal must be restarted. */
4025 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4027 struct bfinfdpic_relocs_info *entry = *entryp;
4030 if (entry->symndx == -1)
4032 struct elf_link_hash_entry *h = entry->d.h;
4033 struct bfinfdpic_relocs_info *oentry;
4035 while (h->root.type == bfd_link_hash_indirect
4036 || h->root.type == bfd_link_hash_warning)
4037 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4039 if (entry->d.h == h)
4042 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4047 /* Merge the two entries. */
4048 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4049 htab_clear_slot (*htab, entryp);
4055 /* If we can't find this entry with the new bfd hash, re-insert
4056 it, and get the traversal restarted. */
4057 if (! htab_find (*htab, entry))
4059 htab_clear_slot (*htab, entryp);
4060 entryp = htab_find_slot (*htab, entry, INSERT);
4063 /* Abort the traversal, since the whole table may have
4064 moved, and leave it up to the parent to restart the
4066 *(htab_t *)p = NULL;
4074 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4075 section and the rofixup section. Assign locations for GOT and PLT
4079 _bfinfdpic_size_got_plt (bfd *output_bfd,
4080 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4084 struct bfd_link_info *info = gpinfop->g.info;
4085 bfd *dynobj = elf_hash_table (info)->dynobj;
4087 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4088 sizeof (gpinfop->g));
4091 /* Compute the total size taken by entries in the 18-bit range,
4092 to tell how many PLT function descriptors we can bring into it
4093 without causing it to overflow. */
4094 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4095 if (limit < (bfd_vma)1 << 18)
4096 limit = ((bfd_vma)1 << 18) - limit;
4099 if (gpinfop->g.fdplt < limit)
4100 limit = gpinfop->g.fdplt;
4102 /* Determine the ranges of GOT offsets that we can use for each
4103 range of addressing modes. */
4104 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4111 (bfd_vma)1 << (18-1));
4112 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4113 gpinfop->got17m4.min,
4115 gpinfop->got17m4.max,
4118 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4119 (bfd_vma)1 << (32-1));
4121 /* Now assign (most) GOT offsets. */
4122 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4125 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4126 - gpinfop->gothilo.min
4127 /* If an odd word is the last word of the GOT, we don't need this
4128 word to be part of the GOT. */
4129 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4130 if (bfinfdpic_got_section (info)->size == 0)
4131 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4132 else if (bfinfdpic_got_section (info)->size == 12
4133 && ! elf_hash_table (info)->dynamic_sections_created)
4135 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4136 bfinfdpic_got_section (info)->size = 0;
4140 bfinfdpic_got_section (info)->contents =
4141 (bfd_byte *) bfd_zalloc (dynobj,
4142 bfinfdpic_got_section (info)->size);
4143 if (bfinfdpic_got_section (info)->contents == NULL)
4147 if (elf_hash_table (info)->dynamic_sections_created)
4148 /* Subtract the number of lzplt entries, since those will generate
4149 relocations in the pltrel section. */
4150 bfinfdpic_gotrel_section (info)->size =
4151 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4152 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4154 BFD_ASSERT (gpinfop->g.relocs == 0);
4155 if (bfinfdpic_gotrel_section (info)->size == 0)
4156 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4159 bfinfdpic_gotrel_section (info)->contents =
4160 (bfd_byte *) bfd_zalloc (dynobj,
4161 bfinfdpic_gotrel_section (info)->size);
4162 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4166 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4167 if (bfinfdpic_gotfixup_section (info)->size == 0)
4168 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4171 bfinfdpic_gotfixup_section (info)->contents =
4172 (bfd_byte *) bfd_zalloc (dynobj,
4173 bfinfdpic_gotfixup_section (info)->size);
4174 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4178 if (elf_hash_table (info)->dynamic_sections_created)
4179 bfinfdpic_pltrel_section (info)->size =
4180 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4181 if (bfinfdpic_pltrel_section (info)->size == 0)
4182 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4185 bfinfdpic_pltrel_section (info)->contents =
4186 (bfd_byte *) bfd_zalloc (dynobj,
4187 bfinfdpic_pltrel_section (info)->size);
4188 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4192 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4193 such that there's room for the additional instruction needed to
4194 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4195 account for them, our block size is 4 bytes smaller than the real
4197 if (elf_hash_table (info)->dynamic_sections_created)
4199 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4200 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4201 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4204 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4205 actually assign lazy PLT entries addresses. */
4206 gpinfop->g.lzplt = 0;
4208 /* Save information that we're going to need to generate GOT and PLT
4210 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4212 if (get_elf_backend_data (output_bfd)->want_got_sym)
4213 elf_hash_table (info)->hgot->root.u.def.value
4214 = bfinfdpic_got_initial_offset (info);
4216 if (elf_hash_table (info)->dynamic_sections_created)
4217 bfinfdpic_plt_initial_offset (info) =
4218 bfinfdpic_plt_section (info)->size;
4220 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4223 /* Allocate the PLT section contents only after
4224 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4225 non-lazy PLT entries. */
4226 if (bfinfdpic_plt_section (info)->size == 0)
4227 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4230 bfinfdpic_plt_section (info)->contents =
4231 (bfd_byte *) bfd_zalloc (dynobj,
4232 bfinfdpic_plt_section (info)->size);
4233 if (bfinfdpic_plt_section (info)->contents == NULL)
4240 /* Set the sizes of the dynamic sections. */
4243 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4244 struct bfd_link_info *info)
4246 struct elf_link_hash_table *htab;
4249 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4251 htab = elf_hash_table (info);
4252 dynobj = htab->dynobj;
4253 BFD_ASSERT (dynobj != NULL);
4255 if (htab->dynamic_sections_created)
4257 /* Set the contents of the .interp section to the interpreter. */
4258 if (bfd_link_executable (info) && !info->nointerp)
4260 s = bfd_get_linker_section (dynobj, ".interp");
4261 BFD_ASSERT (s != NULL);
4262 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4263 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4267 memset (&gpinfo, 0, sizeof (gpinfo));
4268 gpinfo.g.info = info;
4272 htab_t relocs = bfinfdpic_relocs_info (info);
4274 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4276 if (relocs == bfinfdpic_relocs_info (info))
4280 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4283 /* Allocate space to save the summary information, we're going to
4284 use it if we're doing relaxations. */
4285 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4287 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4290 if (elf_hash_table (info)->dynamic_sections_created)
4292 if (bfinfdpic_got_section (info)->size)
4293 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4296 if (bfinfdpic_pltrel_section (info)->size)
4297 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4298 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4299 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4302 if (bfinfdpic_gotrel_section (info)->size)
4303 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4304 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4305 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4306 sizeof (Elf32_External_Rel)))
4310 s = bfd_get_linker_section (dynobj, ".dynbss");
4311 if (s && s->size == 0)
4312 s->flags |= SEC_EXCLUDE;
4314 s = bfd_get_linker_section (dynobj, ".rela.bss");
4315 if (s && s->size == 0)
4316 s->flags |= SEC_EXCLUDE;
4322 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4323 struct bfd_link_info *info)
4325 if (!bfd_link_relocatable (info)
4326 && !bfd_elf_stack_segment_size (output_bfd, info,
4327 "__stacksize", DEFAULT_STACK_SIZE))
4333 /* Check whether any of the relocations was optimized away, and
4334 subtract it from the relocation or fixup count. */
4336 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4337 struct bfd_link_info *info,
4338 bfd_boolean *changed)
4340 Elf_Internal_Shdr *symtab_hdr;
4341 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4342 Elf_Internal_Rela *rel, *erel;
4344 if ((sec->flags & SEC_RELOC) == 0
4345 || sec->reloc_count == 0)
4348 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4349 sym_hashes = elf_sym_hashes (abfd);
4350 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4351 if (!elf_bad_symtab (abfd))
4352 sym_hashes_end -= symtab_hdr->sh_info;
4354 rel = elf_section_data (sec)->relocs;
4356 /* Now examine each relocation. */
4357 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4359 struct elf_link_hash_entry *h;
4360 unsigned long r_symndx;
4361 struct bfinfdpic_relocs_info *picrel;
4362 struct _bfinfdpic_dynamic_got_info *dinfo;
4364 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4365 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4368 if (_bfd_elf_section_offset (sec->output_section->owner,
4369 info, sec, rel->r_offset)
4373 r_symndx = ELF32_R_SYM (rel->r_info);
4374 if (r_symndx < symtab_hdr->sh_info)
4378 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4379 while (h->root.type == bfd_link_hash_indirect
4380 || h->root.type == bfd_link_hash_warning)
4381 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4385 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4387 rel->r_addend, NO_INSERT);
4389 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4391 rel->r_addend, NO_INSERT);
4397 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4399 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4400 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4402 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4404 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4411 bfinfdpic_elf_discard_info (bfd *ibfd,
4412 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4413 struct bfd_link_info *info)
4415 bfd_boolean changed = FALSE;
4419 /* Account for relaxation of .eh_frame section. */
4420 for (s = ibfd->sections; s; s = s->next)
4421 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4423 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4425 obfd = s->output_section->owner;
4430 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4432 memset (&gpinfo, 0, sizeof (gpinfo));
4433 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4436 /* Clear GOT and PLT assignments. */
4437 htab_traverse (bfinfdpic_relocs_info (info),
4438 _bfinfdpic_reset_got_plt_entries,
4441 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4449 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4450 struct bfd_link_info *info)
4455 dynobj = elf_hash_table (info)->dynobj;
4457 if (bfinfdpic_got_section (info))
4459 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
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 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5256 copy the initial value out of the dynamic object and into the
5257 runtime process image. We need to remember the offset into the
5258 .rela.bss section we are going to use. */
5259 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5263 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5264 BFD_ASSERT (srel != NULL);
5265 srel->size += sizeof (Elf32_External_Rela);
5269 /* We need to figure out the alignment required for this symbol. I
5270 have no idea how ELF linkers handle this. */
5271 power_of_two = bfd_log2 (h->size);
5272 if (power_of_two > 3)
5275 /* Apply the required alignment. */
5276 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5277 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5279 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5283 /* Define the symbol as being at this point in the section. */
5284 h->root.u.def.section = s;
5285 h->root.u.def.value = s->size;
5287 /* Increment the section size to make room for the symbol. */
5293 /* The bfin linker needs to keep track of the number of relocs that it
5294 decides to copy in check_relocs for each symbol. This is so that it
5295 can discard PC relative relocs if it doesn't need them when linking
5296 with -Bsymbolic. We store the information in a field extending the
5297 regular ELF linker hash table. */
5299 /* This structure keeps track of the number of PC relative relocs we have
5300 copied for a given symbol. */
5302 struct bfin_pcrel_relocs_copied
5305 struct bfin_pcrel_relocs_copied *next;
5306 /* A section in dynobj. */
5308 /* Number of relocs copied in this section. */
5309 bfd_size_type count;
5312 /* This function is called via elf_link_hash_traverse if we are
5313 creating a shared object. In the -Bsymbolic case it discards the
5314 space allocated to copy PC relative relocs against symbols which
5315 are defined in regular objects. For the normal shared case, it
5316 discards space for pc-relative relocs that have become local due to
5317 symbol visibility changes. We allocated space for them in the
5318 check_relocs routine, but we won't fill them in in the
5319 relocate_section routine.
5321 We also check whether any of the remaining relocations apply
5322 against a readonly section, and set the DF_TEXTREL flag in this
5326 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5328 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5329 struct bfin_pcrel_relocs_copied *s;
5331 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5333 if ((info->flags & DF_TEXTREL) == 0)
5335 /* Look for relocations against read-only sections. */
5336 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5337 s != NULL; s = s->next)
5338 if ((s->section->flags & SEC_READONLY) != 0)
5340 info->flags |= DF_TEXTREL;
5348 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5349 s != NULL; s = s->next)
5350 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5356 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5357 struct bfd_link_info *info)
5363 dynobj = elf_hash_table (info)->dynobj;
5364 BFD_ASSERT (dynobj != NULL);
5366 if (elf_hash_table (info)->dynamic_sections_created)
5368 /* Set the contents of the .interp section to the interpreter. */
5369 if (bfd_link_executable (info))
5371 s = bfd_get_linker_section (dynobj, ".interp");
5372 BFD_ASSERT (s != NULL);
5373 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5374 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5379 /* We may have created entries in the .rela.got section.
5380 However, if we are not creating the dynamic sections, we will
5381 not actually use these entries. Reset the size of .rela.got,
5382 which will cause it to get stripped from the output file
5384 s = bfd_get_linker_section (dynobj, ".rela.got");
5389 /* If this is a -Bsymbolic shared link, then we need to discard all
5390 PC relative relocs against symbols defined in a regular object.
5391 For the normal shared case we discard the PC relative relocs
5392 against symbols that have become local due to visibility changes.
5393 We allocated space for them in the check_relocs routine, but we
5394 will not fill them in in the relocate_section routine. */
5395 if (bfd_link_pic (info))
5396 elf_link_hash_traverse (elf_hash_table (info),
5397 bfin_discard_copies, info);
5399 /* The check_relocs and adjust_dynamic_symbol entry points have
5400 determined the sizes of the various dynamic sections. Allocate
5403 for (s = dynobj->sections; s != NULL; s = s->next)
5408 if ((s->flags & SEC_LINKER_CREATED) == 0)
5411 /* It's OK to base decisions on the section name, because none
5412 of the dynobj section names depend upon the input files. */
5413 name = bfd_get_section_name (dynobj, s);
5417 if (CONST_STRNEQ (name, ".rela"))
5421 /* If we don't need this section, strip it from the
5422 output file. This is mostly to handle .rela.bss and
5423 .rela.plt. We must create both sections in
5424 create_dynamic_sections, because they must be created
5425 before the linker maps input sections to output
5426 sections. The linker does that before
5427 adjust_dynamic_symbol is called, and it is that
5428 function which decides whether anything needs to go
5429 into these sections. */
5436 /* We use the reloc_count field as a counter if we need
5437 to copy relocs into the output file. */
5441 else if (! CONST_STRNEQ (name, ".got"))
5443 /* It's not one of our sections, so don't allocate space. */
5449 s->flags |= SEC_EXCLUDE;
5453 /* Allocate memory for the section contents. */
5454 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5455 Unused entries should be reclaimed before the section's contents
5456 are written out, but at the moment this does not happen. Thus in
5457 order to prevent writing out garbage, we initialise the section's
5458 contents to zero. */
5459 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5460 if (s->contents == NULL && s->size != 0)
5464 if (elf_hash_table (info)->dynamic_sections_created)
5466 /* Add some entries to the .dynamic section. We fill in the
5467 values later, in bfin_finish_dynamic_sections, but we
5468 must add the entries now so that we get the correct size for
5469 the .dynamic section. The DT_DEBUG entry is filled in by the
5470 dynamic linker and used by the debugger. */
5471 #define add_dynamic_entry(TAG, VAL) \
5472 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5474 if (!bfd_link_pic (info))
5476 if (!add_dynamic_entry (DT_DEBUG, 0))
5483 if (!add_dynamic_entry (DT_RELA, 0)
5484 || !add_dynamic_entry (DT_RELASZ, 0)
5485 || !add_dynamic_entry (DT_RELAENT,
5486 sizeof (Elf32_External_Rela)))
5490 if ((info->flags & DF_TEXTREL) != 0)
5492 if (!add_dynamic_entry (DT_TEXTREL, 0))
5496 #undef add_dynamic_entry
5501 /* Given a .data section and a .emreloc in-memory section, store
5502 relocation information into the .emreloc section which can be
5503 used at runtime to relocate the section. This is called by the
5504 linker when the --embedded-relocs switch is used. This is called
5505 after the add_symbols entry point has been called for all the
5506 objects, and before the final_link entry point is called. */
5509 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5510 struct bfd_link_info *info,
5515 Elf_Internal_Shdr *symtab_hdr;
5516 Elf_Internal_Sym *isymbuf = NULL;
5517 Elf_Internal_Rela *internal_relocs = NULL;
5518 Elf_Internal_Rela *irel, *irelend;
5522 BFD_ASSERT (! bfd_link_relocatable (info));
5526 if (datasec->reloc_count == 0)
5529 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5531 /* Get a copy of the native relocations. */
5532 internal_relocs = (_bfd_elf_link_read_relocs
5533 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5534 info->keep_memory));
5535 if (internal_relocs == NULL)
5538 amt = (bfd_size_type) datasec->reloc_count * 12;
5539 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5540 if (relsec->contents == NULL)
5543 p = relsec->contents;
5545 irelend = internal_relocs + datasec->reloc_count;
5546 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5548 asection *targetsec;
5550 /* We are going to write a four byte longword into the runtime
5551 reloc section. The longword will be the address in the data
5552 section which must be relocated. It is followed by the name
5553 of the target section NUL-padded or truncated to 8
5556 /* We can only relocate absolute longword relocs at run time. */
5557 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5559 *errmsg = _("unsupported reloc type");
5560 bfd_set_error (bfd_error_bad_value);
5564 /* Get the target section referred to by the reloc. */
5565 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5567 /* A local symbol. */
5568 Elf_Internal_Sym *isym;
5570 /* Read this BFD's local symbols if we haven't done so already. */
5571 if (isymbuf == NULL)
5573 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5574 if (isymbuf == NULL)
5575 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5576 symtab_hdr->sh_info, 0,
5578 if (isymbuf == NULL)
5582 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5583 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5588 struct elf_link_hash_entry *h;
5590 /* An external symbol. */
5591 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5592 h = elf_sym_hashes (abfd)[indx];
5593 BFD_ASSERT (h != NULL);
5594 if (h->root.type == bfd_link_hash_defined
5595 || h->root.type == bfd_link_hash_defweak)
5596 targetsec = h->root.u.def.section;
5601 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5602 memset (p + 4, 0, 8);
5603 if (targetsec != NULL)
5604 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5607 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5609 if (internal_relocs != NULL
5610 && elf_section_data (datasec)->relocs != internal_relocs)
5611 free (internal_relocs);
5615 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5617 if (internal_relocs != NULL
5618 && elf_section_data (datasec)->relocs != internal_relocs)
5619 free (internal_relocs);
5623 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5625 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5626 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5627 { NULL, 0, 0, 0, 0 }
5631 #define TARGET_LITTLE_SYM bfin_elf32_vec
5632 #define TARGET_LITTLE_NAME "elf32-bfin"
5633 #define ELF_ARCH bfd_arch_bfin
5634 #define ELF_TARGET_ID BFIN_ELF_DATA
5635 #define ELF_MACHINE_CODE EM_BLACKFIN
5636 #define ELF_MAXPAGESIZE 0x1000
5637 #define elf_symbol_leading_char '_'
5639 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5640 #define bfd_elf32_bfd_reloc_name_lookup \
5641 bfin_bfd_reloc_name_lookup
5642 #define elf_info_to_howto bfin_info_to_howto
5643 #define elf_info_to_howto_rel 0
5644 #define elf_backend_object_p elf32_bfin_object_p
5646 #define bfd_elf32_bfd_is_local_label_name \
5647 bfin_is_local_label_name
5648 #define bfin_hash_table(p) \
5649 ((struct bfin_link_hash_table *) (p)->hash)
5653 #define elf_backend_create_dynamic_sections \
5654 _bfd_elf_create_dynamic_sections
5655 #define bfd_elf32_bfd_link_hash_table_create \
5656 bfin_link_hash_table_create
5657 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5659 #define elf_backend_check_relocs bfin_check_relocs
5660 #define elf_backend_adjust_dynamic_symbol \
5661 bfin_adjust_dynamic_symbol
5662 #define elf_backend_size_dynamic_sections \
5663 bfin_size_dynamic_sections
5664 #define elf_backend_relocate_section bfin_relocate_section
5665 #define elf_backend_finish_dynamic_symbol \
5666 bfin_finish_dynamic_symbol
5667 #define elf_backend_finish_dynamic_sections \
5668 bfin_finish_dynamic_sections
5669 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5670 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5671 #define bfd_elf32_bfd_merge_private_bfd_data \
5672 elf32_bfin_merge_private_bfd_data
5673 #define bfd_elf32_bfd_set_private_flags \
5674 elf32_bfin_set_private_flags
5675 #define bfd_elf32_bfd_print_private_bfd_data \
5676 elf32_bfin_print_private_bfd_data
5677 #define elf_backend_final_write_processing \
5678 elf32_bfin_final_write_processing
5679 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5680 #define elf_backend_stack_align 8
5681 #define elf_backend_can_gc_sections 1
5682 #define elf_backend_special_sections elf32_bfin_special_sections
5683 #define elf_backend_can_refcount 1
5684 #define elf_backend_want_got_plt 0
5685 #define elf_backend_plt_readonly 1
5686 #define elf_backend_want_plt_sym 0
5687 #define elf_backend_got_header_size 12
5688 #define elf_backend_rela_normal 1
5690 #include "elf32-target.h"
5692 #undef TARGET_LITTLE_SYM
5693 #define TARGET_LITTLE_SYM bfin_elf32_fdpic_vec
5694 #undef TARGET_LITTLE_NAME
5695 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5697 #define elf32_bed elf32_bfinfdpic_bed
5699 #undef elf_backend_gc_sweep_hook
5700 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5702 #undef elf_backend_got_header_size
5703 #define elf_backend_got_header_size 0
5705 #undef elf_backend_relocate_section
5706 #define elf_backend_relocate_section bfinfdpic_relocate_section
5707 #undef elf_backend_check_relocs
5708 #define elf_backend_check_relocs bfinfdpic_check_relocs
5710 #undef bfd_elf32_bfd_link_hash_table_create
5711 #define bfd_elf32_bfd_link_hash_table_create \
5712 bfinfdpic_elf_link_hash_table_create
5713 #undef elf_backend_always_size_sections
5714 #define elf_backend_always_size_sections \
5715 elf32_bfinfdpic_always_size_sections
5717 #undef elf_backend_create_dynamic_sections
5718 #define elf_backend_create_dynamic_sections \
5719 elf32_bfinfdpic_create_dynamic_sections
5720 #undef elf_backend_adjust_dynamic_symbol
5721 #define elf_backend_adjust_dynamic_symbol \
5722 elf32_bfinfdpic_adjust_dynamic_symbol
5723 #undef elf_backend_size_dynamic_sections
5724 #define elf_backend_size_dynamic_sections \
5725 elf32_bfinfdpic_size_dynamic_sections
5726 #undef elf_backend_finish_dynamic_symbol
5727 #define elf_backend_finish_dynamic_symbol \
5728 elf32_bfinfdpic_finish_dynamic_symbol
5729 #undef elf_backend_finish_dynamic_sections
5730 #define elf_backend_finish_dynamic_sections \
5731 elf32_bfinfdpic_finish_dynamic_sections
5733 #undef elf_backend_discard_info
5734 #define elf_backend_discard_info \
5735 bfinfdpic_elf_discard_info
5736 #undef elf_backend_can_make_relative_eh_frame
5737 #define elf_backend_can_make_relative_eh_frame \
5738 bfinfdpic_elf_use_relative_eh_frame
5739 #undef elf_backend_can_make_lsda_relative_eh_frame
5740 #define elf_backend_can_make_lsda_relative_eh_frame \
5741 bfinfdpic_elf_use_relative_eh_frame
5742 #undef elf_backend_encode_eh_address
5743 #define elf_backend_encode_eh_address \
5744 bfinfdpic_elf_encode_eh_address
5746 #undef elf_backend_may_use_rel_p
5747 #define elf_backend_may_use_rel_p 1
5748 #undef elf_backend_may_use_rela_p
5749 #define elf_backend_may_use_rela_p 1
5750 /* We use REL for dynamic relocations only. */
5751 #undef elf_backend_default_use_rela_p
5752 #define elf_backend_default_use_rela_p 1
5754 #undef elf_backend_omit_section_dynsym
5755 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5757 #include "elf32-target.h"