1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007, 2008, 2009 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 PTR data ATTRIBUTE_UNUSED,
37 asection *input_section ATTRIBUTE_UNUSED,
38 bfd *output_bfd ATTRIBUTE_UNUSED,
39 char **error_message ATTRIBUTE_UNUSED)
41 bfd_reloc_status_type flag = bfd_reloc_ok;
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd *abfd,
51 asection *input_section,
53 char **error_message ATTRIBUTE_UNUSED)
56 bfd_size_type addr = reloc_entry->address;
57 bfd_vma output_base = 0;
58 reloc_howto_type *howto = reloc_entry->howto;
59 asection *output_section;
60 bfd_boolean relocatable = (output_bfd != NULL);
62 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63 return bfd_reloc_outofrange;
65 if (bfd_is_und_section (symbol->section)
66 && (symbol->flags & BSF_WEAK) == 0
68 return bfd_reloc_undefined;
70 if (bfd_is_com_section (symbol->section))
73 relocation = symbol->value;
75 output_section = symbol->section->output_section;
80 output_base = output_section->vma;
82 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83 relocation += output_base + symbol->section->output_offset;
85 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86 relocation += reloc_entry->addend;
88 relocation -= input_section->output_section->vma + input_section->output_offset;
89 relocation -= reloc_entry->address;
91 if (howto->complain_on_overflow != complain_overflow_dont)
93 bfd_reloc_status_type status;
94 status = bfd_check_overflow (howto->complain_on_overflow,
97 bfd_arch_bits_per_address(abfd),
99 if (status != bfd_reloc_ok)
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto->rightshift && (relocation & 0x01))
106 fprintf(stderr, "relocation should be even number\n");
107 return bfd_reloc_overflow;
110 relocation >>= (bfd_vma) howto->rightshift;
111 /* Shift everything up to where it's going to be used. */
113 relocation <<= (bfd_vma) howto->bitpos;
117 reloc_entry->address += input_section->output_offset;
118 reloc_entry->addend += symbol->section->output_offset;
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
132 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
136 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137 x = relocation & 0xFFFF;
138 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd *abfd,
145 arelent *reloc_entry,
148 asection *input_section,
150 char **error_message ATTRIBUTE_UNUSED)
152 bfd_vma relocation, x;
153 bfd_size_type reloc_addr = reloc_entry->address;
154 bfd_vma output_base = 0;
155 reloc_howto_type *howto = reloc_entry->howto;
156 asection *output_section;
157 bfd_boolean relocatable = (output_bfd != NULL);
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161 return bfd_reloc_outofrange;
163 if (bfd_is_und_section (symbol->section)
164 && (symbol->flags & BSF_WEAK) == 0
166 return bfd_reloc_undefined;
168 output_section = symbol->section->output_section;
169 relocation = symbol->value;
171 /* Convert input-section-relative symbol value to absolute. */
175 output_base = output_section->vma;
177 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178 relocation += output_base + symbol->section->output_offset;
180 /* Add in supplied addend. */
181 relocation += reloc_entry->addend;
185 reloc_entry->address += input_section->output_offset;
186 reloc_entry->addend += symbol->section->output_offset;
190 reloc_entry->addend = 0;
193 if (howto->complain_on_overflow != complain_overflow_dont)
195 bfd_reloc_status_type flag;
196 flag = bfd_check_overflow (howto->complain_on_overflow,
199 bfd_arch_bits_per_address(abfd),
201 if (flag != bfd_reloc_ok)
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
208 relocation >>= (bfd_vma) howto->rightshift;
210 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd *abfd,
217 arelent *reloc_entry,
220 asection *input_section,
222 char **error_message ATTRIBUTE_UNUSED)
224 bfd_vma relocation, x;
225 bfd_size_type addr = reloc_entry->address;
226 bfd_vma output_base = 0;
227 asection *output_section;
228 bfd_boolean relocatable = (output_bfd != NULL);
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232 return bfd_reloc_outofrange;
234 if (bfd_is_und_section (symbol->section)
235 && (symbol->flags & BSF_WEAK) == 0
237 return bfd_reloc_undefined;
239 output_section = symbol->section->output_section;
240 relocation = symbol->value;
241 /* Convert input-section-relative symbol value to absolute. */
245 output_base = output_section->vma;
248 && symbol->section->name
249 && !strcmp (symbol->name, symbol->section->name))
252 relocation += output_base + symbol->section->output_offset;
255 relocation += reloc_entry->addend;
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry->address += input_section->output_offset;
261 reloc_entry->addend += symbol->section->output_offset;
265 reloc_entry->addend = 0;
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x = relocation & 0xFFFF0000;
272 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
274 x = relocation & 0x0000FFFF;
275 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd *abfd,
283 arelent *reloc_entry,
286 asection *input_section,
288 char **error_message ATTRIBUTE_UNUSED)
291 bfd_size_type addr = reloc_entry->address;
292 bfd_vma output_base = 0;
293 reloc_howto_type *howto = reloc_entry->howto;
294 asection *output_section;
295 bfd_boolean relocatable = (output_bfd != NULL);
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299 return bfd_reloc_outofrange;
301 if (bfd_is_und_section (symbol->section)
302 && (symbol->flags & BSF_WEAK) == 0
304 return bfd_reloc_undefined;
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol->section))
310 relocation = symbol->value;
312 output_section = symbol->section->output_section;
314 /* Convert input-section-relative symbol value to absolute. */
318 output_base = output_section->vma;
320 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321 relocation += output_base + symbol->section->output_offset;
323 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
325 /* Add in supplied addend. */
326 relocation += reloc_entry->addend;
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
332 if (howto->pc_relative == TRUE)
334 relocation -= input_section->output_section->vma + input_section->output_offset;
336 if (howto->pcrel_offset == TRUE)
337 relocation -= reloc_entry->address;
342 reloc_entry->address += input_section->output_offset;
343 reloc_entry->addend += symbol->section->output_offset;
346 if (howto->complain_on_overflow != complain_overflow_dont)
348 bfd_reloc_status_type status;
350 status = bfd_check_overflow (howto->complain_on_overflow,
353 bfd_arch_bits_per_address(abfd),
355 if (status != bfd_reloc_ok)
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto->rightshift && (relocation & 0x01))
362 fprintf(stderr, "relocation should be even number\n");
363 return bfd_reloc_overflow;
366 relocation >>= (bfd_vma) howto->rightshift;
368 /* Shift everything up to where it's going to be used. */
370 relocation <<= (bfd_vma) howto->bitpos;
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
375 /* handle 8 and 16 bit relocations here. */
380 char x = bfd_get_8 (abfd, (char *) data + addr);
382 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
388 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
390 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
395 return bfd_reloc_other;
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
421 static reloc_howto_type bfin_howto_table [] =
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0, /* type. */
426 2, /* size (0 = byte, 1 = short, 2 = long). */
428 FALSE, /* pc_relative. */
430 complain_overflow_bitfield, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_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 2, /* size (0 = byte, 1 = short, 2 = long). */
456 FALSE, /* pc_relative. */
458 complain_overflow_bitfield, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_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 2, /* size (0 = byte, 1 = short, 2 = long). */
586 FALSE, /* pc_relative. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE, /* partial_inplace. */
594 FALSE), /* pcrel_offset. */
596 HOWTO (R_BFIN_UNUSEDC, /* type. */
598 2, /* size (0 = byte, 1 = short, 2 = long). */
600 FALSE, /* pc_relative. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_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 = BFIN_RELOC_MIN;
1070 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;)
1071 if (bfin_reloc_map[i].bfd_reloc_val == code)
1072 r_type = bfin_reloc_map[i].bfin_reloc_val;
1074 if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN)
1075 return &bfin_howto_table [r_type];
1077 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1080 return (reloc_howto_type *) NULL;
1083 static reloc_howto_type *
1084 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1090 i < (sizeof (bfin_howto_table)
1091 / sizeof (bfin_howto_table[0]));
1093 if (bfin_howto_table[i].name != NULL
1094 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1095 return &bfin_howto_table[i];
1098 i < (sizeof (bfin_gnuext_howto_table)
1099 / sizeof (bfin_gnuext_howto_table[0]));
1101 if (bfin_gnuext_howto_table[i].name != NULL
1102 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1103 return &bfin_gnuext_howto_table[i];
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type *
1110 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1111 unsigned int r_type)
1113 if (r_type <= BFIN_RELOC_MAX)
1114 return &bfin_howto_table [r_type];
1116 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1117 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1119 return (reloc_howto_type *) NULL;
1122 /* Return TRUE if the name is a local label.
1123 bfin local labels begin with L$. */
1125 bfin_is_local_label_name (
1129 if (label[0] == 'L' && label[1] == '$' )
1132 return _bfd_elf_is_local_label_name (abfd, label);
1135 /* Look through the relocs for a section during the first phase, and
1136 allocate space in the global offset table or procedure linkage
1140 bfin_check_relocs (bfd * abfd,
1141 struct bfd_link_info *info,
1143 const Elf_Internal_Rela *relocs)
1146 Elf_Internal_Shdr *symtab_hdr;
1147 struct elf_link_hash_entry **sym_hashes;
1148 bfd_signed_vma *local_got_refcounts;
1149 const Elf_Internal_Rela *rel;
1150 const Elf_Internal_Rela *rel_end;
1153 if (info->relocatable)
1156 dynobj = elf_hash_table (info)->dynobj;
1157 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1158 sym_hashes = elf_sym_hashes (abfd);
1159 local_got_refcounts = elf_local_got_refcounts (abfd);
1164 rel_end = relocs + sec->reloc_count;
1165 for (rel = relocs; rel < rel_end; rel++)
1167 unsigned long r_symndx;
1168 struct elf_link_hash_entry *h;
1170 r_symndx = ELF32_R_SYM (rel->r_info);
1171 if (r_symndx < symtab_hdr->sh_info)
1174 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1176 switch (ELF32_R_TYPE (rel->r_info))
1178 /* This relocation describes the C++ object vtable hierarchy.
1179 Reconstruct it for later use during GC. */
1180 case R_BFIN_GNU_VTINHERIT:
1181 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1185 /* This relocation describes which C++ vtable entries
1186 are actually used. Record for later use during GC. */
1187 case R_BFIN_GNU_VTENTRY:
1188 BFD_ASSERT (h != NULL);
1190 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1196 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1202 /* Create the .got section. */
1203 elf_hash_table (info)->dynobj = dynobj = abfd;
1204 if (!_bfd_elf_create_got_section (dynobj, info))
1210 sgot = bfd_get_section_by_name (dynobj, ".got");
1211 BFD_ASSERT (sgot != NULL);
1214 if (srelgot == NULL && (h != NULL || info->shared))
1216 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1217 if (srelgot == NULL)
1219 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1220 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1222 srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
1225 || !bfd_set_section_alignment (dynobj, srelgot, 2))
1232 if (h->got.refcount == 0)
1234 /* Make sure this symbol is output as a dynamic symbol. */
1235 if (h->dynindx == -1 && !h->forced_local)
1237 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1241 /* Allocate space in the .got section. */
1243 /* Allocate relocation space. */
1244 srelgot->size += sizeof (Elf32_External_Rela);
1250 /* This is a global offset table entry for a local symbol. */
1251 if (local_got_refcounts == NULL)
1255 size = symtab_hdr->sh_info;
1256 size *= sizeof (bfd_signed_vma);
1257 local_got_refcounts = ((bfd_signed_vma *)
1258 bfd_zalloc (abfd, size));
1259 if (local_got_refcounts == NULL)
1261 elf_local_got_refcounts (abfd) = local_got_refcounts;
1263 if (local_got_refcounts[r_symndx] == 0)
1268 /* If we are generating a shared object, we need to
1269 output a R_68K_RELATIVE reloc so that the dynamic
1270 linker can adjust this GOT entry. */
1271 srelgot->size += sizeof (Elf32_External_Rela);
1274 local_got_refcounts[r_symndx]++;
1286 static enum elf_reloc_type_class
1287 elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela)
1289 switch ((int) ELF32_R_TYPE (rela->r_info))
1292 return reloc_class_normal;
1296 static bfd_reloc_status_type
1297 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1298 bfd *input_bfd, asection *input_section,
1299 bfd_byte *contents, bfd_vma address,
1300 bfd_vma value, bfd_vma addend)
1302 int r_type = ELF32_R_TYPE (rel->r_info);
1304 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1306 bfd_reloc_status_type r = bfd_reloc_ok;
1309 if (address > bfd_get_section_limit (input_bfd, input_section))
1310 return bfd_reloc_outofrange;
1314 /* Perform usual pc-relative correction. */
1315 value -= input_section->output_section->vma + input_section->output_offset;
1318 /* We are getting reloc_entry->address 2 byte off from
1319 the start of instruction. Assuming absolute postion
1320 of the reloc data. But, following code had been written assuming
1321 reloc address is starting at begining of instruction.
1322 To compensate that I have increased the value of
1323 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1328 if ((value & 0xFF000000) != 0
1329 && (value & 0xFF000000) != 0xFF000000)
1330 r = bfd_reloc_overflow;
1334 x = bfd_get_16 (input_bfd, contents + address);
1335 x = (x & 0xff00) | ((value >> 16) & 0xff);
1336 bfd_put_16 (input_bfd, x, contents + address);
1338 x = bfd_get_16 (input_bfd, contents + address + 2);
1340 bfd_put_16 (input_bfd, x, contents + address + 2);
1344 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1345 rel->r_offset, value, addend);
1350 bfin_relocate_section (bfd * output_bfd,
1351 struct bfd_link_info *info,
1353 asection * input_section,
1354 bfd_byte * contents,
1355 Elf_Internal_Rela * relocs,
1356 Elf_Internal_Sym * local_syms,
1357 asection ** local_sections)
1360 Elf_Internal_Shdr *symtab_hdr;
1361 struct elf_link_hash_entry **sym_hashes;
1362 bfd_vma *local_got_offsets;
1364 Elf_Internal_Rela *rel;
1365 Elf_Internal_Rela *relend;
1368 dynobj = elf_hash_table (info)->dynobj;
1369 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1370 sym_hashes = elf_sym_hashes (input_bfd);
1371 local_got_offsets = elf_local_got_offsets (input_bfd);
1376 relend = relocs + input_section->reloc_count;
1377 for (; rel < relend; rel++, i++)
1380 reloc_howto_type *howto;
1381 unsigned long r_symndx;
1382 struct elf_link_hash_entry *h;
1383 Elf_Internal_Sym *sym;
1385 bfd_vma relocation = 0;
1386 bfd_boolean unresolved_reloc;
1387 bfd_reloc_status_type r;
1390 r_type = ELF32_R_TYPE (rel->r_info);
1391 if (r_type < 0 || r_type >= 243)
1393 bfd_set_error (bfd_error_bad_value);
1397 if (r_type == R_BFIN_GNU_VTENTRY
1398 || r_type == R_BFIN_GNU_VTINHERIT)
1401 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1404 bfd_set_error (bfd_error_bad_value);
1407 r_symndx = ELF32_R_SYM (rel->r_info);
1412 unresolved_reloc = FALSE;
1414 if (r_symndx < symtab_hdr->sh_info)
1416 sym = local_syms + r_symndx;
1417 sec = local_sections[r_symndx];
1418 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1424 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1425 r_symndx, symtab_hdr, sym_hashes,
1427 unresolved_reloc, warned);
1430 if (sec != NULL && elf_discarded_section (sec))
1432 /* For relocs against symbols from removed linkonce sections,
1433 or sections discarded by a linker script, we just want the
1434 section contents zeroed. Avoid any special processing. */
1435 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1441 if (info->relocatable)
1444 address = rel->r_offset;
1446 /* Then, process normally. */
1449 case R_BFIN_GNU_VTINHERIT:
1450 case R_BFIN_GNU_VTENTRY:
1451 return bfd_reloc_ok;
1454 /* Relocation is to the address of the entry for this symbol
1455 in the global offset table. */
1457 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1460 /* Relocation is the offset of the entry for this symbol in
1461 the global offset table. */
1468 /* Create the .got section. */
1469 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1470 if (!_bfd_elf_create_got_section (dynobj, info))
1476 sgot = bfd_get_section_by_name (dynobj, ".got");
1477 BFD_ASSERT (sgot != NULL);
1484 off = h->got.offset;
1485 BFD_ASSERT (off != (bfd_vma) - 1);
1486 dyn = elf_hash_table (info)->dynamic_sections_created;
1488 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1495 /* This is actually a static link, or it is a
1496 -Bsymbolic link and the symbol is defined
1497 locally, or the symbol was forced to be local
1498 because of a version file.. We must initialize
1499 this entry in the global offset table. Since
1500 the offset must always be a multiple of 4, we
1501 use the least significant bit to record whether
1502 we have initialized it already.
1504 When doing a dynamic link, we create a .rela.got
1505 relocation entry to initialize the value. This
1506 is done in the finish_dynamic_symbol routine. */
1511 bfd_put_32 (output_bfd, relocation,
1512 sgot->contents + off);
1517 unresolved_reloc = FALSE;
1521 BFD_ASSERT (local_got_offsets != NULL);
1522 off = local_got_offsets[r_symndx];
1523 BFD_ASSERT (off != (bfd_vma) - 1);
1525 /* The offset must always be a multiple of 4. We use
1526 the least significant bit to record whether we have
1527 already generated the necessary reloc. */
1532 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1537 Elf_Internal_Rela outrel;
1540 s = bfd_get_section_by_name (dynobj, ".rela.got");
1541 BFD_ASSERT (s != NULL);
1543 outrel.r_offset = (sgot->output_section->vma
1544 + sgot->output_offset + off);
1546 ELF32_R_INFO (0, R_BFIN_PCREL24);
1547 outrel.r_addend = relocation;
1550 s->reloc_count++ * sizeof (Elf32_External_Rela);
1551 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1554 local_got_offsets[r_symndx] |= 1;
1558 relocation = sgot->output_offset + off;
1560 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1567 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1569 relocation, rel->r_addend);
1574 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1575 because such sections are not SEC_ALLOC and thus ld.so will
1576 not process them. */
1577 if (unresolved_reloc
1578 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
1580 (*_bfd_error_handler)
1581 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1583 input_section, (long) rel->r_offset, h->root.root.string);
1587 if (r != bfd_reloc_ok)
1592 name = h->root.root.string;
1595 name = bfd_elf_string_from_elf_section (input_bfd,
1596 symtab_hdr->sh_link,
1601 name = bfd_section_name (input_bfd, sec);
1604 if (r == bfd_reloc_overflow)
1606 if (!(info->callbacks->reloc_overflow
1607 (info, (h ? &h->root : NULL), name, howto->name,
1608 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1613 (*_bfd_error_handler)
1614 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1615 input_bfd, input_section,
1616 (long) rel->r_offset, name, (int) r);
1626 bfin_gc_mark_hook (asection * sec,
1627 struct bfd_link_info *info,
1628 Elf_Internal_Rela * rel,
1629 struct elf_link_hash_entry *h,
1630 Elf_Internal_Sym * sym)
1633 switch (ELF32_R_TYPE (rel->r_info))
1635 case R_BFIN_GNU_VTINHERIT:
1636 case R_BFIN_GNU_VTENTRY:
1640 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1643 /* Update the got entry reference counts for the section being removed. */
1646 bfin_gc_sweep_hook (bfd * abfd,
1647 struct bfd_link_info *info,
1649 const Elf_Internal_Rela * relocs)
1651 Elf_Internal_Shdr *symtab_hdr;
1652 struct elf_link_hash_entry **sym_hashes;
1653 bfd_signed_vma *local_got_refcounts;
1654 const Elf_Internal_Rela *rel, *relend;
1659 dynobj = elf_hash_table (info)->dynobj;
1663 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1664 sym_hashes = elf_sym_hashes (abfd);
1665 local_got_refcounts = elf_local_got_refcounts (abfd);
1667 sgot = bfd_get_section_by_name (dynobj, ".got");
1668 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1670 relend = relocs + sec->reloc_count;
1671 for (rel = relocs; rel < relend; rel++)
1673 unsigned long r_symndx;
1674 struct elf_link_hash_entry *h;
1676 switch (ELF32_R_TYPE (rel->r_info))
1679 r_symndx = ELF32_R_SYM (rel->r_info);
1680 if (r_symndx >= symtab_hdr->sh_info)
1682 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1683 if (h->got.refcount > 0)
1686 if (h->got.refcount == 0)
1688 /* We don't need the .got entry any more. */
1690 srelgot->size -= sizeof (Elf32_External_Rela);
1694 else if (local_got_refcounts != NULL)
1696 if (local_got_refcounts[r_symndx] > 0)
1698 --local_got_refcounts[r_symndx];
1699 if (local_got_refcounts[r_symndx] == 0)
1701 /* We don't need the .got entry any more. */
1704 srelgot->size -= sizeof (Elf32_External_Rela);
1716 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1717 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1719 /* An extension of the elf hash table data structure, containing some
1720 additional Blackfin-specific data. */
1721 struct bfinfdpic_elf_link_hash_table
1723 struct elf_link_hash_table elf;
1725 /* A pointer to the .got section. */
1727 /* A pointer to the .rel.got section. */
1729 /* A pointer to the .rofixup section. */
1730 asection *sgotfixup;
1731 /* A pointer to the .plt section. */
1733 /* A pointer to the .rel.plt section. */
1735 /* GOT base offset. */
1737 /* Location of the first non-lazy PLT entry, i.e., the number of
1738 bytes taken by lazy PLT entries. */
1740 /* A hash table holding information about which symbols were
1741 referenced with which PIC-related relocations. */
1742 struct htab *relocs_info;
1743 /* Summary reloc information collected by
1744 _bfinfdpic_count_got_plt_entries. */
1745 struct _bfinfdpic_dynamic_got_info *g;
1748 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1750 #define bfinfdpic_hash_table(info) \
1751 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1753 #define bfinfdpic_got_section(info) \
1754 (bfinfdpic_hash_table (info)->sgot)
1755 #define bfinfdpic_gotrel_section(info) \
1756 (bfinfdpic_hash_table (info)->sgotrel)
1757 #define bfinfdpic_gotfixup_section(info) \
1758 (bfinfdpic_hash_table (info)->sgotfixup)
1759 #define bfinfdpic_plt_section(info) \
1760 (bfinfdpic_hash_table (info)->splt)
1761 #define bfinfdpic_pltrel_section(info) \
1762 (bfinfdpic_hash_table (info)->spltrel)
1763 #define bfinfdpic_relocs_info(info) \
1764 (bfinfdpic_hash_table (info)->relocs_info)
1765 #define bfinfdpic_got_initial_offset(info) \
1766 (bfinfdpic_hash_table (info)->got0)
1767 #define bfinfdpic_plt_initial_offset(info) \
1768 (bfinfdpic_hash_table (info)->plt0)
1769 #define bfinfdpic_dynamic_got_plt_info(info) \
1770 (bfinfdpic_hash_table (info)->g)
1772 /* The name of the dynamic interpreter. This is put in the .interp
1775 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1777 #define DEFAULT_STACK_SIZE 0x20000
1779 /* This structure is used to collect the number of entries present in
1780 each addressable range of the got. */
1781 struct _bfinfdpic_dynamic_got_info
1783 /* Several bits of information about the current link. */
1784 struct bfd_link_info *info;
1785 /* Total size needed for GOT entries within the 18- or 32-bit
1787 bfd_vma got17m4, gothilo;
1788 /* Total size needed for function descriptor entries within the 18-
1789 or 32-bit ranges. */
1790 bfd_vma fd17m4, fdhilo;
1791 /* Total size needed function descriptor entries referenced in PLT
1792 entries, that would be profitable to place in offsets close to
1793 the PIC register. */
1795 /* Total size needed by lazy PLT entries. */
1797 /* Number of relocations carried over from input object files. */
1798 unsigned long relocs;
1799 /* Number of fixups introduced by relocations in input object files. */
1800 unsigned long fixups;
1803 /* Create a Blackfin ELF linker hash table. */
1805 static struct bfd_link_hash_table *
1806 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1808 struct bfinfdpic_elf_link_hash_table *ret;
1809 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1811 ret = bfd_zalloc (abfd, amt);
1815 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1816 _bfd_elf_link_hash_newfunc,
1817 sizeof (struct elf_link_hash_entry)))
1823 return &ret->elf.root;
1826 /* Decide whether a reference to a symbol can be resolved locally or
1827 not. If the symbol is protected, we want the local address, but
1828 its function descriptor must be assigned by the dynamic linker. */
1829 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1830 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1831 || ! elf_hash_table (INFO)->dynamic_sections_created)
1832 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1833 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1835 /* This structure collects information on what kind of GOT, PLT or
1836 function descriptors are required by relocations that reference a
1838 struct bfinfdpic_relocs_info
1840 /* The index of the symbol, as stored in the relocation r_info, if
1841 we have a local symbol; -1 otherwise. */
1845 /* The input bfd in which the symbol is defined, if it's a local
1848 /* If symndx == -1, the hash table entry corresponding to a global
1849 symbol (even if it turns out to bind locally, in which case it
1850 should ideally be replaced with section's symndx + addend). */
1851 struct elf_link_hash_entry *h;
1853 /* The addend of the relocation that references the symbol. */
1856 /* The fields above are used to identify an entry. The fields below
1857 contain information on how an entry is used and, later on, which
1858 locations it was assigned. */
1859 /* The following 2 fields record whether the symbol+addend above was
1860 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1861 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1864 /* Whether a FUNCDESC relocation references symbol+addend. */
1866 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1869 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1870 unsigned fdgoff17m4;
1871 unsigned fdgoffhilo;
1872 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1873 GOTOFFHI relocations. The addend doesn't really matter, since we
1874 envision that this will only be used to check whether the symbol
1875 is mapped to the same segment as the got. */
1877 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1879 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1882 /* Whether we need a PLT entry for a symbol. Should be implied by
1884 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1886 /* Whether a function descriptor should be created in this link unit
1887 for symbol+addend. Should be implied by something like:
1888 (plt || fdgotoff17m4 || fdgotofflohi
1889 || ((fd || fdgot17m4 || fdgothilo)
1890 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1892 /* Whether a lazy PLT entry is needed for this symbol+addend.
1893 Should be implied by something like:
1894 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1895 && ! (info->flags & DF_BIND_NOW)) */
1897 /* Whether we've already emitted GOT relocations and PLT entries as
1898 needed for this symbol. */
1901 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1902 relocations referencing the symbol. */
1903 unsigned relocs32, relocsfd, relocsfdv;
1905 /* The number of .rofixups entries and dynamic relocations allocated
1906 for this symbol, minus any that might have already been used. */
1907 unsigned fixups, dynrelocs;
1909 /* The offsets of the GOT entries assigned to symbol+addend, to the
1910 function descriptor's address, and to a function descriptor,
1911 respectively. Should be zero if unassigned. The offsets are
1912 counted from the value that will be assigned to the PIC register,
1913 not from the beginning of the .got section. */
1914 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1915 /* The offsets of the PLT entries assigned to symbol+addend,
1916 non-lazy and lazy, respectively. If unassigned, should be
1918 bfd_vma plt_entry, lzplt_entry;
1921 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1923 bfinfdpic_relocs_info_hash (const void *entry_)
1925 const struct bfinfdpic_relocs_info *entry = entry_;
1927 return (entry->symndx == -1
1928 ? (long) entry->d.h->root.root.hash
1929 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1932 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1935 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1937 const struct bfinfdpic_relocs_info *e1 = entry1;
1938 const struct bfinfdpic_relocs_info *e2 = entry2;
1940 return e1->symndx == e2->symndx && e1->addend == e2->addend
1941 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1944 /* Find or create an entry in a hash table HT that matches the key
1945 fields of the given ENTRY. If it's not found, memory for a new
1946 entry is allocated in ABFD's obstack. */
1947 static struct bfinfdpic_relocs_info *
1948 bfinfdpic_relocs_info_find (struct htab *ht,
1950 const struct bfinfdpic_relocs_info *entry,
1951 enum insert_option insert)
1953 struct bfinfdpic_relocs_info **loc;
1958 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1966 *loc = bfd_zalloc (abfd, sizeof (**loc));
1971 (*loc)->symndx = entry->symndx;
1972 (*loc)->d = entry->d;
1973 (*loc)->addend = entry->addend;
1974 (*loc)->plt_entry = (bfd_vma)-1;
1975 (*loc)->lzplt_entry = (bfd_vma)-1;
1980 /* Obtain the address of the entry in HT associated with H's symbol +
1981 addend, creating a new entry if none existed. ABFD is only used
1982 for memory allocation purposes. */
1983 inline static struct bfinfdpic_relocs_info *
1984 bfinfdpic_relocs_info_for_global (struct htab *ht,
1986 struct elf_link_hash_entry *h,
1988 enum insert_option insert)
1990 struct bfinfdpic_relocs_info entry;
1994 entry.addend = addend;
1996 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1999 /* Obtain the address of the entry in HT associated with the SYMNDXth
2000 local symbol of the input bfd ABFD, plus the addend, creating a new
2001 entry if none existed. */
2002 inline static struct bfinfdpic_relocs_info *
2003 bfinfdpic_relocs_info_for_local (struct htab *ht,
2007 enum insert_option insert)
2009 struct bfinfdpic_relocs_info entry;
2011 entry.symndx = symndx;
2012 entry.d.abfd = abfd;
2013 entry.addend = addend;
2015 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2018 /* Merge fields set by check_relocs() of two entries that end up being
2019 mapped to the same (presumably global) symbol. */
2022 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2023 struct bfinfdpic_relocs_info const *e1)
2025 e2->got17m4 |= e1->got17m4;
2026 e2->gothilo |= e1->gothilo;
2028 e2->fdgot17m4 |= e1->fdgot17m4;
2029 e2->fdgothilo |= e1->fdgothilo;
2030 e2->fdgoff17m4 |= e1->fdgoff17m4;
2031 e2->fdgoffhilo |= e1->fdgoffhilo;
2032 e2->gotoff |= e1->gotoff;
2033 e2->call |= e1->call;
2037 /* Every block of 65535 lazy PLT entries shares a single call to the
2038 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2039 32767, counting from 0). All other lazy PLT entries branch to it
2040 in a single instruction. */
2042 #define LZPLT_RESOLVER_EXTRA 10
2043 #define LZPLT_NORMAL_SIZE 6
2044 #define LZPLT_ENTRIES 1362
2046 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2047 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2049 /* Add a dynamic relocation to the SRELOC section. */
2051 inline static bfd_vma
2052 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2053 int reloc_type, long dynindx, bfd_vma addend,
2054 struct bfinfdpic_relocs_info *entry)
2056 Elf_Internal_Rela outrel;
2057 bfd_vma reloc_offset;
2059 outrel.r_offset = offset;
2060 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2061 outrel.r_addend = addend;
2063 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2064 BFD_ASSERT (reloc_offset < sreloc->size);
2065 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2066 sreloc->contents + reloc_offset);
2067 sreloc->reloc_count++;
2069 /* If the entry's index is zero, this relocation was probably to a
2070 linkonce section that got discarded. We reserved a dynamic
2071 relocation, but it was for another entry than the one we got at
2072 the time of emitting the relocation. Unfortunately there's no
2073 simple way for us to catch this situation, since the relocation
2074 is cleared right before calling relocate_section, at which point
2075 we no longer know what the relocation used to point to. */
2078 BFD_ASSERT (entry->dynrelocs > 0);
2082 return reloc_offset;
2085 /* Add a fixup to the ROFIXUP section. */
2088 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2089 struct bfinfdpic_relocs_info *entry)
2091 bfd_vma fixup_offset;
2093 if (rofixup->flags & SEC_EXCLUDE)
2096 fixup_offset = rofixup->reloc_count * 4;
2097 if (rofixup->contents)
2099 BFD_ASSERT (fixup_offset < rofixup->size);
2100 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2102 rofixup->reloc_count++;
2104 if (entry && entry->symndx)
2106 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2108 BFD_ASSERT (entry->fixups > 0);
2112 return fixup_offset;
2115 /* Find the segment number in which OSEC, and output section, is
2119 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2121 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2123 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2126 inline static bfd_boolean
2127 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2129 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2131 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2134 /* Generate relocations for GOT entries, function descriptors, and
2135 code for PLT and lazy PLT entries. */
2137 inline static bfd_boolean
2138 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2140 struct bfd_link_info *info,
2142 Elf_Internal_Sym *sym,
2146 bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
2153 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2155 /* If the symbol is dynamic, consider it for dynamic
2156 relocations, otherwise decay to section + offset. */
2157 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2158 dynindx = entry->d.h->dynindx;
2162 && sec->output_section
2163 && ! bfd_is_abs_section (sec->output_section)
2164 && ! bfd_is_und_section (sec->output_section))
2165 dynindx = elf_section_data (sec->output_section)->dynindx;
2171 /* Generate relocation for GOT entry pointing to the symbol. */
2172 if (entry->got_entry)
2175 bfd_vma ad = addend;
2177 /* If the symbol is dynamic but binds locally, use
2179 if (sec && (entry->symndx != -1
2180 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2182 if (entry->symndx == -1)
2183 ad += entry->d.h->root.u.def.value;
2185 ad += sym->st_value;
2186 ad += sec->output_offset;
2187 if (sec->output_section && elf_section_data (sec->output_section))
2188 idx = elf_section_data (sec->output_section)->dynindx;
2193 /* If we're linking an executable at a fixed address, we can
2194 omit the dynamic relocation as long as the symbol is local to
2196 if (info->executable && !info->pie
2197 && (entry->symndx != -1
2198 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2201 ad += sec->output_section->vma;
2202 if (entry->symndx != -1
2203 || entry->d.h->root.type != bfd_link_hash_undefweak)
2204 _bfinfdpic_add_rofixup (output_bfd,
2205 bfinfdpic_gotfixup_section (info),
2206 bfinfdpic_got_section (info)->output_section
2208 + bfinfdpic_got_section (info)->output_offset
2209 + bfinfdpic_got_initial_offset (info)
2210 + entry->got_entry, entry);
2213 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2214 _bfd_elf_section_offset
2216 bfinfdpic_got_section (info),
2217 bfinfdpic_got_initial_offset (info)
2219 + bfinfdpic_got_section (info)
2220 ->output_section->vma
2221 + bfinfdpic_got_section (info)->output_offset,
2222 R_BFIN_BYTE4_DATA, idx, ad, entry);
2224 bfd_put_32 (output_bfd, ad,
2225 bfinfdpic_got_section (info)->contents
2226 + bfinfdpic_got_initial_offset (info)
2227 + entry->got_entry);
2230 /* Generate relocation for GOT entry pointing to a canonical
2231 function descriptor. */
2232 if (entry->fdgot_entry)
2237 if (! (entry->symndx == -1
2238 && entry->d.h->root.type == bfd_link_hash_undefweak
2239 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2241 /* If the symbol is dynamic and there may be dynamic symbol
2242 resolution because we are, or are linked with, a shared
2243 library, emit a FUNCDESC relocation such that the dynamic
2244 linker will allocate the function descriptor. If the
2245 symbol needs a non-local function descriptor but binds
2246 locally (e.g., its visibility is protected, emit a
2247 dynamic relocation decayed to section+offset. */
2248 if (entry->symndx == -1
2249 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2250 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2251 && !(info->executable && !info->pie))
2253 reloc = R_BFIN_FUNCDESC;
2254 idx = elf_section_data (entry->d.h->root.u.def.section
2255 ->output_section)->dynindx;
2256 ad = entry->d.h->root.u.def.section->output_offset
2257 + entry->d.h->root.u.def.value;
2259 else if (entry->symndx == -1
2260 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2262 reloc = R_BFIN_FUNCDESC;
2270 /* Otherwise, we know we have a private function descriptor,
2271 so reference it directly. */
2272 if (elf_hash_table (info)->dynamic_sections_created)
2273 BFD_ASSERT (entry->privfd);
2274 reloc = R_BFIN_BYTE4_DATA;
2275 idx = elf_section_data (bfinfdpic_got_section (info)
2276 ->output_section)->dynindx;
2277 ad = bfinfdpic_got_section (info)->output_offset
2278 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2281 /* If there is room for dynamic symbol resolution, emit the
2282 dynamic relocation. However, if we're linking an
2283 executable at a fixed location, we won't have emitted a
2284 dynamic symbol entry for the got section, so idx will be
2285 zero, which means we can and should compute the address
2286 of the private descriptor ourselves. */
2287 if (info->executable && !info->pie
2288 && (entry->symndx != -1
2289 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2291 ad += bfinfdpic_got_section (info)->output_section->vma;
2292 _bfinfdpic_add_rofixup (output_bfd,
2293 bfinfdpic_gotfixup_section (info),
2294 bfinfdpic_got_section (info)
2295 ->output_section->vma
2296 + bfinfdpic_got_section (info)
2298 + bfinfdpic_got_initial_offset (info)
2299 + entry->fdgot_entry, entry);
2302 _bfinfdpic_add_dyn_reloc (output_bfd,
2303 bfinfdpic_gotrel_section (info),
2304 _bfd_elf_section_offset
2306 bfinfdpic_got_section (info),
2307 bfinfdpic_got_initial_offset (info)
2308 + entry->fdgot_entry)
2309 + bfinfdpic_got_section (info)
2310 ->output_section->vma
2311 + bfinfdpic_got_section (info)
2313 reloc, idx, ad, entry);
2316 bfd_put_32 (output_bfd, ad,
2317 bfinfdpic_got_section (info)->contents
2318 + bfinfdpic_got_initial_offset (info)
2319 + entry->fdgot_entry);
2322 /* Generate relocation to fill in a private function descriptor in
2324 if (entry->fd_entry)
2327 bfd_vma ad = addend;
2329 long lowword, highword;
2331 /* If the symbol is dynamic but binds locally, use
2333 if (sec && (entry->symndx != -1
2334 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2336 if (entry->symndx == -1)
2337 ad += entry->d.h->root.u.def.value;
2339 ad += sym->st_value;
2340 ad += sec->output_offset;
2341 if (sec->output_section && elf_section_data (sec->output_section))
2342 idx = elf_section_data (sec->output_section)->dynindx;
2347 /* If we're linking an executable at a fixed address, we can
2348 omit the dynamic relocation as long as the symbol is local to
2350 if (info->executable && !info->pie
2351 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2354 ad += sec->output_section->vma;
2356 if (entry->symndx != -1
2357 || entry->d.h->root.type != bfd_link_hash_undefweak)
2359 _bfinfdpic_add_rofixup (output_bfd,
2360 bfinfdpic_gotfixup_section (info),
2361 bfinfdpic_got_section (info)
2362 ->output_section->vma
2363 + bfinfdpic_got_section (info)
2365 + bfinfdpic_got_initial_offset (info)
2366 + entry->fd_entry, entry);
2367 _bfinfdpic_add_rofixup (output_bfd,
2368 bfinfdpic_gotfixup_section (info),
2369 bfinfdpic_got_section (info)
2370 ->output_section->vma
2371 + bfinfdpic_got_section (info)
2373 + bfinfdpic_got_initial_offset (info)
2374 + entry->fd_entry + 4, entry);
2380 = _bfinfdpic_add_dyn_reloc (output_bfd,
2382 ? bfinfdpic_pltrel_section (info)
2383 : bfinfdpic_gotrel_section (info),
2384 _bfd_elf_section_offset
2386 bfinfdpic_got_section (info),
2387 bfinfdpic_got_initial_offset (info)
2389 + bfinfdpic_got_section (info)
2390 ->output_section->vma
2391 + bfinfdpic_got_section (info)
2393 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2396 /* If we've omitted the dynamic relocation, just emit the fixed
2397 addresses of the symbol and of the local GOT base offset. */
2398 if (info->executable && !info->pie && sec && sec->output_section)
2401 highword = bfinfdpic_got_section (info)->output_section->vma
2402 + bfinfdpic_got_section (info)->output_offset
2403 + bfinfdpic_got_initial_offset (info);
2405 else if (entry->lazyplt)
2410 fd_lazy_rel_offset = ofst;
2412 /* A function descriptor used for lazy or local resolving is
2413 initialized such that its high word contains the output
2414 section index in which the PLT entries are located, and
2415 the low word contains the address of the lazy PLT entry
2416 entry point, that must be within the memory region
2417 assigned to that section. */
2418 lowword = entry->lzplt_entry + 4
2419 + bfinfdpic_plt_section (info)->output_offset
2420 + bfinfdpic_plt_section (info)->output_section->vma;
2421 highword = _bfinfdpic_osec_to_segment
2422 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2426 /* A function descriptor for a local function gets the index
2427 of the section. For a non-local function, it's
2431 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2432 && entry->d.h->dynindx == idx))
2435 highword = _bfinfdpic_osec_to_segment
2436 (output_bfd, sec->output_section);
2439 bfd_put_32 (output_bfd, lowword,
2440 bfinfdpic_got_section (info)->contents
2441 + bfinfdpic_got_initial_offset (info)
2443 bfd_put_32 (output_bfd, highword,
2444 bfinfdpic_got_section (info)->contents
2445 + bfinfdpic_got_initial_offset (info)
2446 + entry->fd_entry + 4);
2449 /* Generate code for the PLT entry. */
2450 if (entry->plt_entry != (bfd_vma) -1)
2452 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2455 BFD_ASSERT (entry->fd_entry);
2457 /* Figure out what kind of PLT entry we need, depending on the
2458 location of the function descriptor within the GOT. */
2459 if (entry->fd_entry >= -(1 << (18 - 1))
2460 && entry->fd_entry + 4 < (1 << (18 - 1)))
2462 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2463 bfd_put_32 (output_bfd,
2464 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2466 bfd_put_32 (output_bfd,
2467 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2473 /* P1.L = fd_entry; P1.H = fd_entry;
2477 bfd_put_32 (output_bfd,
2478 0xe109 | (entry->fd_entry << 16),
2480 bfd_put_32 (output_bfd,
2481 0xe149 | (entry->fd_entry & 0xFFFF0000),
2483 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2484 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2485 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2489 bfd_put_16 (output_bfd, 0x0051, plt_code);
2492 /* Generate code for the lazy PLT entry. */
2493 if (entry->lzplt_entry != (bfd_vma) -1)
2495 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2496 + entry->lzplt_entry;
2497 bfd_vma resolverStub_addr;
2499 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2502 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2503 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2504 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2505 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2507 if (entry->lzplt_entry == resolverStub_addr)
2509 /* This is a lazy PLT entry that includes a resolver call.
2513 bfd_put_32 (output_bfd,
2516 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2520 /* JUMP.S resolverStub */
2521 bfd_put_16 (output_bfd,
2523 | (((resolverStub_addr - entry->lzplt_entry)
2524 / 2) & (((bfd_vma)1 << 12) - 1)),
2532 /* Relocate an Blackfin ELF section.
2534 The RELOCATE_SECTION function is called by the new ELF backend linker
2535 to handle the relocations for a section.
2537 The relocs are always passed as Rela structures; if the section
2538 actually uses Rel structures, the r_addend field will always be
2541 This function is responsible for adjusting the section contents as
2542 necessary, and (if using Rela relocs and generating a relocatable
2543 output file) adjusting the reloc addend as necessary.
2545 This function does not have to worry about setting the reloc
2546 address or the reloc symbol index.
2548 LOCAL_SYMS is a pointer to the swapped in local symbols.
2550 LOCAL_SECTIONS is an array giving the section in the input file
2551 corresponding to the st_shndx field of each local symbol.
2553 The global hash table entry for the global symbols can be found
2554 via elf_sym_hashes (input_bfd).
2556 When generating relocatable output, this function must handle
2557 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2558 going to be the section symbol corresponding to the output
2559 section, which means that the addend must be adjusted
2563 bfinfdpic_relocate_section (bfd * output_bfd,
2564 struct bfd_link_info *info,
2566 asection * input_section,
2567 bfd_byte * contents,
2568 Elf_Internal_Rela * relocs,
2569 Elf_Internal_Sym * local_syms,
2570 asection ** local_sections)
2572 Elf_Internal_Shdr *symtab_hdr;
2573 struct elf_link_hash_entry **sym_hashes;
2574 Elf_Internal_Rela *rel;
2575 Elf_Internal_Rela *relend;
2576 unsigned isec_segment, got_segment, plt_segment,
2578 int silence_segment_error = !(info->shared || info->pie);
2580 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2581 sym_hashes = elf_sym_hashes (input_bfd);
2582 relend = relocs + input_section->reloc_count;
2584 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2585 input_section->output_section);
2586 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2587 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2588 bfinfdpic_got_section (info)
2592 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2593 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2594 bfinfdpic_plt_section (info)
2599 for (rel = relocs; rel < relend; rel ++)
2601 reloc_howto_type *howto;
2602 unsigned long r_symndx;
2603 Elf_Internal_Sym *sym;
2605 struct elf_link_hash_entry *h;
2607 bfd_reloc_status_type r;
2608 const char * name = NULL;
2611 struct bfinfdpic_relocs_info *picrel;
2612 bfd_vma orig_addend = rel->r_addend;
2614 r_type = ELF32_R_TYPE (rel->r_info);
2616 if (r_type == R_BFIN_GNU_VTINHERIT
2617 || r_type == R_BFIN_GNU_VTENTRY)
2620 r_symndx = ELF32_R_SYM (rel->r_info);
2621 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2624 bfd_set_error (bfd_error_bad_value);
2632 if (r_symndx < symtab_hdr->sh_info)
2634 sym = local_syms + r_symndx;
2635 osec = sec = local_sections [r_symndx];
2636 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2638 name = bfd_elf_string_from_elf_section
2639 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2640 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2645 bfd_boolean unresolved_reloc;
2647 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2648 r_symndx, symtab_hdr, sym_hashes,
2650 unresolved_reloc, warned);
2654 if (sec != NULL && elf_discarded_section (sec))
2656 /* For relocs against symbols from removed linkonce sections,
2657 or sections discarded by a linker script, we just want the
2658 section contents zeroed. Avoid any special processing. */
2659 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2665 if (info->relocatable)
2669 && (h->root.type == bfd_link_hash_defined
2670 || h->root.type == bfd_link_hash_defweak)
2671 && !BFINFDPIC_SYM_LOCAL (info, h))
2679 case R_BFIN_PCREL24:
2680 case R_BFIN_PCREL24_JUMP_L:
2681 case R_BFIN_BYTE4_DATA:
2682 if (! IS_FDPIC (output_bfd))
2685 case R_BFIN_GOT17M4:
2688 case R_BFIN_FUNCDESC_GOT17M4:
2689 case R_BFIN_FUNCDESC_GOTHI:
2690 case R_BFIN_FUNCDESC_GOTLO:
2691 case R_BFIN_GOTOFF17M4:
2692 case R_BFIN_GOTOFFHI:
2693 case R_BFIN_GOTOFFLO:
2694 case R_BFIN_FUNCDESC_GOTOFF17M4:
2695 case R_BFIN_FUNCDESC_GOTOFFHI:
2696 case R_BFIN_FUNCDESC_GOTOFFLO:
2697 case R_BFIN_FUNCDESC:
2698 case R_BFIN_FUNCDESC_VALUE:
2700 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2701 (info), input_bfd, h,
2702 orig_addend, INSERT);
2704 /* In order to find the entry we created before, we must
2705 use the original addend, not the one that may have been
2706 modified by _bfd_elf_rela_local_sym(). */
2707 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2708 (info), input_bfd, r_symndx,
2709 orig_addend, INSERT);
2713 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2717 (*_bfd_error_handler)
2718 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2719 input_bfd, input_section, rel->r_offset, name);
2729 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2731 info->callbacks->warning
2732 (info, _("relocation references symbol not defined in the module"),
2733 name, input_bfd, input_section, rel->r_offset);
2741 case R_BFIN_PCREL24:
2742 case R_BFIN_PCREL24_JUMP_L:
2743 check_segment[0] = isec_segment;
2744 if (! IS_FDPIC (output_bfd))
2745 check_segment[1] = isec_segment;
2746 else if (picrel->plt)
2748 relocation = bfinfdpic_plt_section (info)->output_section->vma
2749 + bfinfdpic_plt_section (info)->output_offset
2750 + picrel->plt_entry;
2751 check_segment[1] = plt_segment;
2753 /* We don't want to warn on calls to undefined weak symbols,
2754 as calls to them must be protected by non-NULL tests
2755 anyway, and unprotected calls would invoke undefined
2757 else if (picrel->symndx == -1
2758 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2759 check_segment[1] = check_segment[0];
2761 check_segment[1] = sec
2762 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2766 case R_BFIN_GOT17M4:
2769 relocation = picrel->got_entry;
2770 check_segment[0] = check_segment[1] = got_segment;
2773 case R_BFIN_FUNCDESC_GOT17M4:
2774 case R_BFIN_FUNCDESC_GOTHI:
2775 case R_BFIN_FUNCDESC_GOTLO:
2776 relocation = picrel->fdgot_entry;
2777 check_segment[0] = check_segment[1] = got_segment;
2780 case R_BFIN_GOTOFFHI:
2781 case R_BFIN_GOTOFF17M4:
2782 case R_BFIN_GOTOFFLO:
2783 relocation -= bfinfdpic_got_section (info)->output_section->vma
2784 + bfinfdpic_got_section (info)->output_offset
2785 + bfinfdpic_got_initial_offset (info);
2786 check_segment[0] = got_segment;
2787 check_segment[1] = sec
2788 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2792 case R_BFIN_FUNCDESC_GOTOFF17M4:
2793 case R_BFIN_FUNCDESC_GOTOFFHI:
2794 case R_BFIN_FUNCDESC_GOTOFFLO:
2795 relocation = picrel->fd_entry;
2796 check_segment[0] = check_segment[1] = got_segment;
2799 case R_BFIN_FUNCDESC:
2802 bfd_vma addend = rel->r_addend;
2804 if (! (h && h->root.type == bfd_link_hash_undefweak
2805 && BFINFDPIC_SYM_LOCAL (info, h)))
2807 /* If the symbol is dynamic and there may be dynamic
2808 symbol resolution because we are or are linked with a
2809 shared library, emit a FUNCDESC relocation such that
2810 the dynamic linker will allocate the function
2811 descriptor. If the symbol needs a non-local function
2812 descriptor but binds locally (e.g., its visibility is
2813 protected, emit a dynamic relocation decayed to
2815 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2816 && BFINFDPIC_SYM_LOCAL (info, h)
2817 && !(info->executable && !info->pie))
2819 dynindx = elf_section_data (h->root.u.def.section
2820 ->output_section)->dynindx;
2821 addend += h->root.u.def.section->output_offset
2822 + h->root.u.def.value;
2824 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2828 info->callbacks->warning
2829 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2830 name, input_bfd, input_section, rel->r_offset);
2833 dynindx = h->dynindx;
2837 /* Otherwise, we know we have a private function
2838 descriptor, so reference it directly. */
2839 BFD_ASSERT (picrel->privfd);
2840 r_type = R_BFIN_BYTE4_DATA;
2841 dynindx = elf_section_data (bfinfdpic_got_section (info)
2842 ->output_section)->dynindx;
2843 addend = bfinfdpic_got_section (info)->output_offset
2844 + bfinfdpic_got_initial_offset (info)
2848 /* If there is room for dynamic symbol resolution, emit
2849 the dynamic relocation. However, if we're linking an
2850 executable at a fixed location, we won't have emitted a
2851 dynamic symbol entry for the got section, so idx will
2852 be zero, which means we can and should compute the
2853 address of the private descriptor ourselves. */
2854 if (info->executable && !info->pie
2855 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2859 addend += bfinfdpic_got_section (info)->output_section->vma;
2860 if ((bfd_get_section_flags (output_bfd,
2861 input_section->output_section)
2862 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2864 if (_bfinfdpic_osec_readonly_p (output_bfd,
2868 info->callbacks->warning
2870 _("cannot emit fixups in read-only section"),
2871 name, input_bfd, input_section, rel->r_offset);
2875 offset = _bfd_elf_section_offset
2877 input_section, rel->r_offset);
2879 if (offset != (bfd_vma)-1)
2880 _bfinfdpic_add_rofixup (output_bfd,
2881 bfinfdpic_gotfixup_section
2883 offset + input_section
2884 ->output_section->vma
2885 + input_section->output_offset,
2889 else if ((bfd_get_section_flags (output_bfd,
2890 input_section->output_section)
2891 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2895 if (_bfinfdpic_osec_readonly_p (output_bfd,
2899 info->callbacks->warning
2901 _("cannot emit dynamic relocations in read-only section"),
2902 name, input_bfd, input_section, rel->r_offset);
2905 offset = _bfd_elf_section_offset (output_bfd, info,
2906 input_section, rel->r_offset);
2908 if (offset != (bfd_vma)-1)
2909 _bfinfdpic_add_dyn_reloc (output_bfd,
2910 bfinfdpic_gotrel_section (info),
2911 offset + input_section
2912 ->output_section->vma
2913 + input_section->output_offset,
2915 dynindx, addend, picrel);
2918 addend += bfinfdpic_got_section (info)->output_section->vma;
2921 /* We want the addend in-place because dynamic
2922 relocations are REL. Setting relocation to it should
2923 arrange for it to be installed. */
2924 relocation = addend - rel->r_addend;
2926 check_segment[0] = check_segment[1] = got_segment;
2929 case R_BFIN_BYTE4_DATA:
2930 if (! IS_FDPIC (output_bfd))
2932 check_segment[0] = check_segment[1] = -1;
2936 case R_BFIN_FUNCDESC_VALUE:
2939 bfd_vma addend = rel->r_addend;
2941 offset = _bfd_elf_section_offset (output_bfd, info,
2942 input_section, rel->r_offset);
2944 /* If the symbol is dynamic but binds locally, use
2946 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2948 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2950 info->callbacks->warning
2951 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2952 name, input_bfd, input_section, rel->r_offset);
2955 dynindx = h->dynindx;
2960 addend += h->root.u.def.value;
2962 addend += sym->st_value;
2964 addend += osec->output_offset;
2965 if (osec && osec->output_section
2966 && ! bfd_is_abs_section (osec->output_section)
2967 && ! bfd_is_und_section (osec->output_section))
2968 dynindx = elf_section_data (osec->output_section)->dynindx;
2973 /* If we're linking an executable at a fixed address, we
2974 can omit the dynamic relocation as long as the symbol
2975 is defined in the current link unit (which is implied
2976 by its output section not being NULL). */
2977 if (info->executable && !info->pie
2978 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2981 addend += osec->output_section->vma;
2982 if (IS_FDPIC (input_bfd)
2983 && (bfd_get_section_flags (output_bfd,
2984 input_section->output_section)
2985 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2987 if (_bfinfdpic_osec_readonly_p (output_bfd,
2991 info->callbacks->warning
2993 _("cannot emit fixups in read-only section"),
2994 name, input_bfd, input_section, rel->r_offset);
2997 if (!h || h->root.type != bfd_link_hash_undefweak)
2999 if (offset != (bfd_vma)-1)
3001 _bfinfdpic_add_rofixup (output_bfd,
3002 bfinfdpic_gotfixup_section
3004 offset + input_section
3005 ->output_section->vma
3006 + input_section->output_offset,
3009 if (r_type == R_BFIN_FUNCDESC_VALUE)
3010 _bfinfdpic_add_rofixup
3012 bfinfdpic_gotfixup_section (info),
3013 offset + input_section->output_section->vma
3014 + input_section->output_offset + 4, picrel);
3021 if ((bfd_get_section_flags (output_bfd,
3022 input_section->output_section)
3023 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3025 if (_bfinfdpic_osec_readonly_p (output_bfd,
3029 info->callbacks->warning
3031 _("cannot emit dynamic relocations in read-only section"),
3032 name, input_bfd, input_section, rel->r_offset);
3036 if (offset != (bfd_vma)-1)
3037 _bfinfdpic_add_dyn_reloc (output_bfd,
3038 bfinfdpic_gotrel_section (info),
3040 + input_section->output_section->vma
3041 + input_section->output_offset,
3042 r_type, dynindx, addend, picrel);
3045 addend += osec->output_section->vma;
3046 /* We want the addend in-place because dynamic
3047 relocations are REL. Setting relocation to it
3048 should arrange for it to be installed. */
3049 relocation = addend - rel->r_addend;
3052 if (r_type == R_BFIN_FUNCDESC_VALUE)
3054 /* If we've omitted the dynamic relocation, just emit
3055 the fixed addresses of the symbol and of the local
3057 if (info->executable && !info->pie
3058 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3059 bfd_put_32 (output_bfd,
3060 bfinfdpic_got_section (info)->output_section->vma
3061 + bfinfdpic_got_section (info)->output_offset
3062 + bfinfdpic_got_initial_offset (info),
3063 contents + rel->r_offset + 4);
3065 /* A function descriptor used for lazy or local
3066 resolving is initialized such that its high word
3067 contains the output section index in which the
3068 PLT entries are located, and the low word
3069 contains the offset of the lazy PLT entry entry
3070 point into that section. */
3071 bfd_put_32 (output_bfd,
3072 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3074 : _bfinfdpic_osec_to_segment (output_bfd,
3077 contents + rel->r_offset + 4);
3080 check_segment[0] = check_segment[1] = got_segment;
3084 check_segment[0] = isec_segment;
3085 check_segment[1] = sec
3086 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3091 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3093 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3094 in the ld testsuite. */
3095 /* This helps catch problems in GCC while we can't do more
3096 than static linking. The idea is to test whether the
3097 input file basename is crt0.o only once. */
3098 if (silence_segment_error == 1)
3099 silence_segment_error =
3100 (strlen (input_bfd->filename) == 6
3101 && strcmp (input_bfd->filename, "crt0.o") == 0)
3102 || (strlen (input_bfd->filename) > 6
3103 && strcmp (input_bfd->filename
3104 + strlen (input_bfd->filename) - 7,
3108 if (!silence_segment_error
3109 /* We don't want duplicate errors for undefined
3111 && !(picrel && picrel->symndx == -1
3112 && picrel->d.h->root.type == bfd_link_hash_undefined))
3113 info->callbacks->warning
3115 (info->shared || info->pie)
3116 ? _("relocations between different segments are not supported")
3117 : _("warning: relocation references a different segment"),
3118 name, input_bfd, input_section, rel->r_offset);
3119 if (!silence_segment_error && (info->shared || info->pie))
3121 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3126 case R_BFIN_GOTOFFHI:
3127 /* We need the addend to be applied before we shift the
3129 relocation += rel->r_addend;
3132 case R_BFIN_FUNCDESC_GOTHI:
3133 case R_BFIN_FUNCDESC_GOTOFFHI:
3138 case R_BFIN_FUNCDESC_GOTLO:
3139 case R_BFIN_GOTOFFLO:
3140 case R_BFIN_FUNCDESC_GOTOFFLO:
3141 relocation &= 0xffff;
3150 case R_BFIN_PCREL24:
3151 case R_BFIN_PCREL24_JUMP_L:
3152 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3156 /* When referencing a GOT entry, a function descriptor or a
3157 PLT, we don't want the addend to apply to the reference,
3158 but rather to the referenced symbol. The actual entry
3159 will have already been created taking the addend into
3160 account, so cancel it out here. */
3161 case R_BFIN_GOT17M4:
3164 case R_BFIN_FUNCDESC_GOT17M4:
3165 case R_BFIN_FUNCDESC_GOTHI:
3166 case R_BFIN_FUNCDESC_GOTLO:
3167 case R_BFIN_FUNCDESC_GOTOFF17M4:
3168 case R_BFIN_FUNCDESC_GOTOFFHI:
3169 case R_BFIN_FUNCDESC_GOTOFFLO:
3170 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3171 here, since we do want to apply the addend to the others.
3172 Note that we've applied the addend to GOTOFFHI before we
3173 shifted it right. */
3174 case R_BFIN_GOTOFFHI:
3175 relocation -= rel->r_addend;
3182 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3183 contents, rel->r_offset,
3184 relocation, rel->r_addend);
3186 if (r != bfd_reloc_ok)
3188 const char * msg = (const char *) NULL;
3192 case bfd_reloc_overflow:
3193 r = info->callbacks->reloc_overflow
3194 (info, (h ? &h->root : NULL), name, howto->name,
3195 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3198 case bfd_reloc_undefined:
3199 r = info->callbacks->undefined_symbol
3200 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3203 case bfd_reloc_outofrange:
3204 msg = _("internal error: out of range error");
3207 case bfd_reloc_notsupported:
3208 msg = _("internal error: unsupported relocation error");
3211 case bfd_reloc_dangerous:
3212 msg = _("internal error: dangerous relocation");
3216 msg = _("internal error: unknown error");
3221 r = info->callbacks->warning
3222 (info, msg, name, input_bfd, input_section, rel->r_offset);
3232 /* Update the relocation information for the relocations of the section
3236 bfinfdpic_gc_sweep_hook (bfd *abfd,
3237 struct bfd_link_info *info,
3239 const Elf_Internal_Rela *relocs)
3241 Elf_Internal_Shdr *symtab_hdr;
3242 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3243 const Elf_Internal_Rela *rel;
3244 const Elf_Internal_Rela *rel_end;
3245 struct bfinfdpic_relocs_info *picrel;
3247 BFD_ASSERT (IS_FDPIC (abfd));
3249 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3250 sym_hashes = elf_sym_hashes (abfd);
3251 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3252 if (!elf_bad_symtab (abfd))
3253 sym_hashes_end -= symtab_hdr->sh_info;
3255 rel_end = relocs + sec->reloc_count;
3256 for (rel = relocs; rel < rel_end; rel++)
3258 struct elf_link_hash_entry *h;
3259 unsigned long r_symndx;
3261 r_symndx = ELF32_R_SYM (rel->r_info);
3262 if (r_symndx < symtab_hdr->sh_info)
3265 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3268 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3270 rel->r_addend, NO_INSERT);
3272 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3273 (info), abfd, r_symndx,
3274 rel->r_addend, NO_INSERT);
3279 switch (ELF32_R_TYPE (rel->r_info))
3281 case R_BFIN_PCREL24:
3282 case R_BFIN_PCREL24_JUMP_L:
3286 case R_BFIN_FUNCDESC_VALUE:
3287 picrel->relocsfdv--;
3288 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3292 case R_BFIN_BYTE4_DATA:
3294 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3298 case R_BFIN_GOT17M4:
3307 case R_BFIN_FUNCDESC_GOT17M4:
3308 picrel->fdgot17m4--;
3311 case R_BFIN_FUNCDESC_GOTHI:
3312 case R_BFIN_FUNCDESC_GOTLO:
3313 picrel->fdgothilo--;
3316 case R_BFIN_GOTOFF17M4:
3317 case R_BFIN_GOTOFFHI:
3318 case R_BFIN_GOTOFFLO:
3322 case R_BFIN_FUNCDESC_GOTOFF17M4:
3323 picrel->fdgoff17m4--;
3326 case R_BFIN_FUNCDESC_GOTOFFHI:
3327 case R_BFIN_FUNCDESC_GOTOFFLO:
3328 picrel->fdgoffhilo--;
3331 case R_BFIN_FUNCDESC:
3344 /* We need dynamic symbols for every section, since segments can
3345 relocate independently. */
3347 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3348 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3351 switch (elf_section_data (p)->this_hdr.sh_type)
3355 /* If sh_type is yet undecided, assume it could be
3356 SHT_PROGBITS/SHT_NOBITS. */
3360 /* There shouldn't be section relative relocations
3361 against any other section. */
3367 /* Create a .got section, as well as its additional info field. This
3368 is almost entirely copied from
3369 elflink.c:_bfd_elf_create_got_section(). */
3372 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3374 flagword flags, pltflags;
3376 struct elf_link_hash_entry *h;
3377 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3381 /* This function may be called more than once. */
3382 s = bfd_get_section_by_name (abfd, ".got");
3383 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3386 /* Machine specific: although pointers are 32-bits wide, we want the
3387 GOT to be aligned to a 64-bit boundary, such that function
3388 descriptors in it can be accessed with 64-bit loads and
3392 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3393 | SEC_LINKER_CREATED);
3396 s = bfd_make_section_with_flags (abfd, ".got", flags);
3398 || !bfd_set_section_alignment (abfd, s, ptralign))
3401 if (bed->want_got_plt)
3403 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3405 || !bfd_set_section_alignment (abfd, s, ptralign))
3409 if (bed->want_got_sym)
3411 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3412 (or .got.plt) section. We don't do this in the linker script
3413 because we don't want to define the symbol if we are not creating
3414 a global offset table. */
3415 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3416 elf_hash_table (info)->hgot = h;
3420 /* Machine-specific: we want the symbol for executables as
3422 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3426 /* The first bit of the global offset table is the header. */
3427 s->size += bed->got_header_size;
3429 /* This is the machine-specific part. Create and initialize section
3430 data for the got. */
3431 if (IS_FDPIC (abfd))
3433 bfinfdpic_got_section (info) = s;
3434 bfinfdpic_relocs_info (info) = htab_try_create (1,
3435 bfinfdpic_relocs_info_hash,
3436 bfinfdpic_relocs_info_eq,
3438 if (! bfinfdpic_relocs_info (info))
3441 s = bfd_make_section_with_flags (abfd, ".rel.got",
3442 (flags | SEC_READONLY));
3444 || ! bfd_set_section_alignment (abfd, s, 2))
3447 bfinfdpic_gotrel_section (info) = s;
3449 /* Machine-specific. */
3450 s = bfd_make_section_with_flags (abfd, ".rofixup",
3451 (flags | SEC_READONLY));
3453 || ! bfd_set_section_alignment (abfd, s, 2))
3456 bfinfdpic_gotfixup_section (info) = s;
3463 flags = BSF_GLOBAL | BSF_WEAK;
3467 pltflags |= SEC_CODE;
3468 if (bed->plt_not_loaded)
3469 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3470 if (bed->plt_readonly)
3471 pltflags |= SEC_READONLY;
3473 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
3475 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3477 /* Blackfin-specific: remember it. */
3478 bfinfdpic_plt_section (info) = s;
3480 if (bed->want_plt_sym)
3482 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3484 struct bfd_link_hash_entry *bh = NULL;
3486 if (! (_bfd_generic_link_add_one_symbol
3487 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3488 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3490 h = (struct elf_link_hash_entry *) bh;
3492 h->type = STT_OBJECT;
3494 if (! info->executable
3495 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3499 /* Blackfin-specific: we want rel relocations for the plt. */
3500 s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY);
3502 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3504 /* Blackfin-specific: remember it. */
3505 bfinfdpic_pltrel_section (info) = s;
3510 /* Make sure the got and plt sections exist, and that our pointers in
3511 the link hash table point to them. */
3514 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3516 /* This is mostly copied from
3517 elflink.c:_bfd_elf_create_dynamic_sections(). */
3520 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3522 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3523 | SEC_LINKER_CREATED);
3525 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3526 .rel[a].bss sections. */
3528 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3529 if (! _bfin_create_got_section (abfd, info))
3532 /* Blackfin-specific: make sure we created everything we wanted. */
3533 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3534 /* && bfinfdpic_gotfixup_section (info) */
3535 && bfinfdpic_plt_section (info)
3536 && bfinfdpic_pltrel_section (info));
3538 if (bed->want_dynbss)
3540 /* The .dynbss section is a place to put symbols which are defined
3541 by dynamic objects, are referenced by regular objects, and are
3542 not functions. We must allocate space for them in the process
3543 image and use a R_*_COPY reloc to tell the dynamic linker to
3544 initialize them at run time. The linker script puts the .dynbss
3545 section into the .bss section of the final image. */
3546 s = bfd_make_section_with_flags (abfd, ".dynbss",
3547 SEC_ALLOC | SEC_LINKER_CREATED);
3551 /* The .rel[a].bss section holds copy relocs. This section is not
3552 normally needed. We need to create it here, though, so that the
3553 linker will map it to an output section. We can't just create it
3554 only if we need it, because we will not know whether we need it
3555 until we have seen all the input files, and the first time the
3556 main linker code calls BFD after examining all the input files
3557 (size_dynamic_sections) the input sections have already been
3558 mapped to the output sections. If the section turns out not to
3559 be needed, we can discard it later. We will never need this
3560 section when generating a shared object, since they do not use
3564 s = bfd_make_section_with_flags (abfd,
3566 flags | SEC_READONLY);
3568 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3576 /* Compute the total GOT size required by each symbol in each range.
3577 Symbols may require up to 4 words in the GOT: an entry pointing to
3578 the symbol, an entry pointing to its function descriptor, and a
3579 private function descriptors taking two words. */
3582 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3583 struct _bfinfdpic_dynamic_got_info *dinfo)
3585 /* Allocate space for a GOT entry pointing to the symbol. */
3587 dinfo->got17m4 += 4;
3588 else if (entry->gothilo)
3589 dinfo->gothilo += 4;
3594 /* Allocate space for a GOT entry pointing to the function
3596 if (entry->fdgot17m4)
3597 dinfo->got17m4 += 4;
3598 else if (entry->fdgothilo)
3599 dinfo->gothilo += 4;
3604 /* Decide whether we need a PLT entry, a function descriptor in the
3605 GOT, and a lazy PLT entry for this symbol. */
3606 entry->plt = entry->call
3607 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3608 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3609 entry->privfd = entry->plt
3610 || entry->fdgoff17m4 || entry->fdgoffhilo
3611 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3612 && (entry->symndx != -1
3613 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3614 entry->lazyplt = entry->privfd
3615 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3616 && ! (dinfo->info->flags & DF_BIND_NOW)
3617 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3619 /* Allocate space for a function descriptor. */
3620 if (entry->fdgoff17m4)
3622 else if (entry->privfd && entry->plt)
3624 else if (entry->privfd)
3631 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3634 /* Compute the number of dynamic relocations and fixups that a symbol
3635 requires, and add (or subtract) from the grand and per-symbol
3639 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3640 struct _bfinfdpic_dynamic_got_info *dinfo,
3641 bfd_boolean subtract)
3643 bfd_vma relocs = 0, fixups = 0;
3645 if (!dinfo->info->executable || dinfo->info->pie)
3646 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3649 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3651 if (entry->symndx != -1
3652 || entry->d.h->root.type != bfd_link_hash_undefweak)
3653 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3656 relocs += entry->relocs32 + entry->relocsfdv;
3658 if (entry->symndx != -1
3659 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3661 if (entry->symndx != -1
3662 || entry->d.h->root.type != bfd_link_hash_undefweak)
3663 fixups += entry->relocsfd;
3666 relocs += entry->relocsfd;
3675 entry->dynrelocs += relocs;
3676 entry->fixups += fixups;
3677 dinfo->relocs += relocs;
3678 dinfo->fixups += fixups;
3681 /* Compute the total GOT and PLT size required by each symbol in each range. *
3682 Symbols may require up to 4 words in the GOT: an entry pointing to
3683 the symbol, an entry pointing to its function descriptor, and a
3684 private function descriptors taking two words. */
3687 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3689 struct bfinfdpic_relocs_info *entry = *entryp;
3690 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3692 _bfinfdpic_count_nontls_entries (entry, dinfo);
3694 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3699 /* This structure is used to assign offsets to got entries, function
3700 descriptors, plt entries and lazy plt entries. */
3702 struct _bfinfdpic_dynamic_got_plt_info
3704 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3705 struct _bfinfdpic_dynamic_got_info g;
3707 /* For each addressable range, we record a MAX (positive) and MIN
3708 (negative) value. CUR is used to assign got entries, and it's
3709 incremented from an initial positive value to MAX, then from MIN
3710 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3711 assign function descriptors, and it's decreased from an initial
3712 non-positive value to MIN, then from MAX down to CUR (unless CUR
3713 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3714 to even words. ODD, if non-zero, indicates an odd word to be
3715 used for the next got entry, otherwise CUR is used and
3716 incremented by a pair of words, wrapping around when it reaches
3717 MAX. FDCUR is decremented (and wrapped) before the next function
3718 descriptor is chosen. FDPLT indicates the number of remaining
3719 slots that can be used for function descriptors used only by PLT
3721 struct _bfinfdpic_dynamic_got_alloc_data
3723 bfd_signed_vma max, cur, odd, fdcur, min;
3728 /* Determine the positive and negative ranges to be used by each
3729 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3730 double-word boundary, are the minimum (negative) and maximum
3731 (positive) GOT offsets already used by previous ranges, except for
3732 an ODD entry that may have been left behind. GOT and FD indicate
3733 the size of GOT entries and function descriptors that must be
3734 placed within the range from -WRAP to WRAP. If there's room left,
3735 up to FDPLT bytes should be reserved for additional function
3738 inline static bfd_signed_vma
3739 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3740 bfd_signed_vma fdcur,
3748 bfd_signed_vma wrapmin = -wrap;
3750 /* Start at the given initial points. */
3754 /* If we had an incoming odd word and we have any got entries that
3755 are going to use it, consume it, otherwise leave gad->odd at
3756 zero. We might force gad->odd to zero and return the incoming
3757 odd such that it is used by the next range, but then GOT entries
3758 might appear to be out of order and we wouldn't be able to
3759 shorten the GOT by one word if it turns out to end with an
3760 unpaired GOT entry. */
3770 /* If we're left with an unpaired GOT entry, compute its location
3771 such that we can return it. Otherwise, if got doesn't require an
3772 odd number of words here, either odd was already zero in the
3773 block above, or it was set to zero because got was non-zero, or
3774 got was already zero. In the latter case, we want the value of
3775 odd to carry over to the return statement, so we don't want to
3776 reset odd unless the condition below is true. */
3783 /* Compute the tentative boundaries of this range. */
3784 gad->max = cur + got;
3785 gad->min = fdcur - fd;
3788 /* If function descriptors took too much space, wrap some of them
3790 if (gad->min < wrapmin)
3792 gad->max += wrapmin - gad->min;
3795 /* If there is space left and we have function descriptors
3796 referenced in PLT entries that could take advantage of shorter
3797 offsets, place them here. */
3798 else if (fdplt && gad->min > wrapmin)
3801 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3802 fds = gad->min - wrapmin;
3811 /* If GOT entries took too much space, wrap some of them around.
3812 This may well cause gad->min to become lower than wrapmin. This
3813 will cause a relocation overflow later on, so we don't have to
3815 if ((bfd_vma) gad->max > wrap)
3817 gad->min -= gad->max - wrap;
3820 /* If there is more space left, try to place some more function
3821 descriptors for PLT entries. */
3822 else if (fdplt && (bfd_vma) gad->max < wrap)
3825 if ((bfd_vma) (wrap - gad->max) < fdplt)
3826 fds = wrap - gad->max;
3835 /* If odd was initially computed as an offset past the wrap point,
3838 odd = gad->min + odd - gad->max;
3840 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3841 before returning, so do it here too. This guarantees that,
3842 should cur and fdcur meet at the wrap point, they'll both be
3844 if (gad->cur == gad->max)
3845 gad->cur = gad->min;
3850 /* Compute the location of the next GOT entry, given the allocation
3851 data for a range. */
3853 inline static bfd_signed_vma
3854 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3860 /* If there was an odd word left behind, use it. */
3866 /* Otherwise, use the word pointed to by cur, reserve the next
3867 as an odd word, and skip to the next pair of words, possibly
3870 gad->odd = gad->cur + 4;
3872 if (gad->cur == gad->max)
3873 gad->cur = gad->min;
3879 /* Compute the location of the next function descriptor entry in the
3880 GOT, given the allocation data for a range. */
3882 inline static bfd_signed_vma
3883 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3885 /* If we're at the bottom, wrap around, and only then allocate the
3886 next pair of words. */
3887 if (gad->fdcur == gad->min)
3888 gad->fdcur = gad->max;
3889 return gad->fdcur -= 8;
3892 /* Assign GOT offsets for every GOT entry and function descriptor.
3893 Doing everything in a single pass is tricky. */
3896 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3898 struct bfinfdpic_relocs_info *entry = *entryp;
3899 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3902 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3903 else if (entry->gothilo)
3904 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3906 if (entry->fdgot17m4)
3907 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3908 else if (entry->fdgothilo)
3909 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3911 if (entry->fdgoff17m4)
3912 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3913 else if (entry->plt && dinfo->got17m4.fdplt)
3915 dinfo->got17m4.fdplt -= 8;
3916 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3918 else if (entry->plt)
3920 dinfo->gothilo.fdplt -= 8;
3921 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3923 else if (entry->privfd)
3924 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3929 /* Assign GOT offsets to private function descriptors used by PLT
3930 entries (or referenced by 32-bit offsets), as well as PLT entries
3931 and lazy PLT entries. */
3934 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3936 struct bfinfdpic_relocs_info *entry = *entryp;
3937 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3939 /* If this symbol requires a local function descriptor, allocate
3941 if (entry->privfd && entry->fd_entry == 0)
3943 if (dinfo->got17m4.fdplt)
3945 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3946 dinfo->got17m4.fdplt -= 8;
3950 BFD_ASSERT (dinfo->gothilo.fdplt);
3951 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3952 dinfo->gothilo.fdplt -= 8;
3960 /* We use the section's raw size to mark the location of the
3962 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3964 /* Figure out the length of this PLT entry based on the
3965 addressing mode we need to reach the function descriptor. */
3966 BFD_ASSERT (entry->fd_entry);
3967 if (entry->fd_entry >= -(1 << (18 - 1))
3968 && entry->fd_entry + 4 < (1 << (18 - 1)))
3973 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3978 entry->lzplt_entry = dinfo->g.lzplt;
3979 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3980 /* If this entry is the one that gets the resolver stub, account
3981 for the additional instruction. */
3982 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3983 == BFINFDPIC_LZPLT_RESOLV_LOC)
3984 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3990 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3991 _bfinfdpic_assign_plt_entries. */
3994 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
3996 struct bfinfdpic_relocs_info *entry = *entryp;
3998 entry->got_entry = 0;
3999 entry->fdgot_entry = 0;
4000 entry->fd_entry = 0;
4001 entry->plt_entry = (bfd_vma)-1;
4002 entry->lzplt_entry = (bfd_vma)-1;
4007 /* Follow indirect and warning hash entries so that each got entry
4008 points to the final symbol definition. P must point to a pointer
4009 to the hash table we're traversing. Since this traversal may
4010 modify the hash table, we set this pointer to NULL to indicate
4011 we've made a potentially-destructive change to the hash table, so
4012 the traversal must be restarted. */
4014 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4016 struct bfinfdpic_relocs_info *entry = *entryp;
4019 if (entry->symndx == -1)
4021 struct elf_link_hash_entry *h = entry->d.h;
4022 struct bfinfdpic_relocs_info *oentry;
4024 while (h->root.type == bfd_link_hash_indirect
4025 || h->root.type == bfd_link_hash_warning)
4026 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4028 if (entry->d.h == h)
4031 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4036 /* Merge the two entries. */
4037 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4038 htab_clear_slot (*htab, entryp);
4044 /* If we can't find this entry with the new bfd hash, re-insert
4045 it, and get the traversal restarted. */
4046 if (! htab_find (*htab, entry))
4048 htab_clear_slot (*htab, entryp);
4049 entryp = htab_find_slot (*htab, entry, INSERT);
4052 /* Abort the traversal, since the whole table may have
4053 moved, and leave it up to the parent to restart the
4055 *(htab_t *)p = NULL;
4063 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4064 section and the rofixup section. Assign locations for GOT and PLT
4068 _bfinfdpic_size_got_plt (bfd *output_bfd,
4069 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4073 struct bfd_link_info *info = gpinfop->g.info;
4074 bfd *dynobj = elf_hash_table (info)->dynobj;
4076 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4077 sizeof (gpinfop->g));
4080 /* Compute the total size taken by entries in the 18-bit range,
4081 to tell how many PLT function descriptors we can bring into it
4082 without causing it to overflow. */
4083 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4084 if (limit < (bfd_vma)1 << 18)
4085 limit = ((bfd_vma)1 << 18) - limit;
4088 if (gpinfop->g.fdplt < limit)
4089 limit = gpinfop->g.fdplt;
4091 /* Determine the ranges of GOT offsets that we can use for each
4092 range of addressing modes. */
4093 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4100 (bfd_vma)1 << (18-1));
4101 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4102 gpinfop->got17m4.min,
4104 gpinfop->got17m4.max,
4107 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4108 (bfd_vma)1 << (32-1));
4110 /* Now assign (most) GOT offsets. */
4111 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4114 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4115 - gpinfop->gothilo.min
4116 /* If an odd word is the last word of the GOT, we don't need this
4117 word to be part of the GOT. */
4118 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4119 if (bfinfdpic_got_section (info)->size == 0)
4120 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4121 else if (bfinfdpic_got_section (info)->size == 12
4122 && ! elf_hash_table (info)->dynamic_sections_created)
4124 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4125 bfinfdpic_got_section (info)->size = 0;
4129 bfinfdpic_got_section (info)->contents =
4130 (bfd_byte *) bfd_zalloc (dynobj,
4131 bfinfdpic_got_section (info)->size);
4132 if (bfinfdpic_got_section (info)->contents == NULL)
4136 if (elf_hash_table (info)->dynamic_sections_created)
4137 /* Subtract the number of lzplt entries, since those will generate
4138 relocations in the pltrel section. */
4139 bfinfdpic_gotrel_section (info)->size =
4140 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4141 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4143 BFD_ASSERT (gpinfop->g.relocs == 0);
4144 if (bfinfdpic_gotrel_section (info)->size == 0)
4145 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4148 bfinfdpic_gotrel_section (info)->contents =
4149 (bfd_byte *) bfd_zalloc (dynobj,
4150 bfinfdpic_gotrel_section (info)->size);
4151 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4155 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4156 if (bfinfdpic_gotfixup_section (info)->size == 0)
4157 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4160 bfinfdpic_gotfixup_section (info)->contents =
4161 (bfd_byte *) bfd_zalloc (dynobj,
4162 bfinfdpic_gotfixup_section (info)->size);
4163 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4167 if (elf_hash_table (info)->dynamic_sections_created)
4168 bfinfdpic_pltrel_section (info)->size =
4169 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4170 if (bfinfdpic_pltrel_section (info)->size == 0)
4171 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4174 bfinfdpic_pltrel_section (info)->contents =
4175 (bfd_byte *) bfd_zalloc (dynobj,
4176 bfinfdpic_pltrel_section (info)->size);
4177 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4181 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4182 such that there's room for the additional instruction needed to
4183 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4184 account for them, our block size is 4 bytes smaller than the real
4186 if (elf_hash_table (info)->dynamic_sections_created)
4188 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4189 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4190 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4193 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4194 actually assign lazy PLT entries addresses. */
4195 gpinfop->g.lzplt = 0;
4197 /* Save information that we're going to need to generate GOT and PLT
4199 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4201 if (get_elf_backend_data (output_bfd)->want_got_sym)
4202 elf_hash_table (info)->hgot->root.u.def.value
4203 = bfinfdpic_got_initial_offset (info);
4205 if (elf_hash_table (info)->dynamic_sections_created)
4206 bfinfdpic_plt_initial_offset (info) =
4207 bfinfdpic_plt_section (info)->size;
4209 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4212 /* Allocate the PLT section contents only after
4213 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4214 non-lazy PLT entries. */
4215 if (bfinfdpic_plt_section (info)->size == 0)
4216 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4219 bfinfdpic_plt_section (info)->contents =
4220 (bfd_byte *) bfd_zalloc (dynobj,
4221 bfinfdpic_plt_section (info)->size);
4222 if (bfinfdpic_plt_section (info)->contents == NULL)
4229 /* Set the sizes of the dynamic sections. */
4232 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4233 struct bfd_link_info *info)
4235 struct elf_link_hash_table *htab;
4238 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4240 htab = elf_hash_table (info);
4241 dynobj = htab->dynobj;
4242 BFD_ASSERT (dynobj != NULL);
4244 if (htab->dynamic_sections_created)
4246 /* Set the contents of the .interp section to the interpreter. */
4247 if (info->executable)
4249 s = bfd_get_section_by_name (dynobj, ".interp");
4250 BFD_ASSERT (s != NULL);
4251 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4252 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4256 memset (&gpinfo, 0, sizeof (gpinfo));
4257 gpinfo.g.info = info;
4261 htab_t relocs = bfinfdpic_relocs_info (info);
4263 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4265 if (relocs == bfinfdpic_relocs_info (info))
4269 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4272 /* Allocate space to save the summary information, we're going to
4273 use it if we're doing relaxations. */
4274 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4276 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4279 if (elf_hash_table (info)->dynamic_sections_created)
4281 if (bfinfdpic_got_section (info)->size)
4282 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4285 if (bfinfdpic_pltrel_section (info)->size)
4286 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4287 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4288 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4291 if (bfinfdpic_gotrel_section (info)->size)
4292 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4293 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4294 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4295 sizeof (Elf32_External_Rel)))
4299 s = bfd_get_section_by_name (dynobj, ".dynbss");
4300 if (s && s->size == 0)
4301 s->flags |= SEC_EXCLUDE;
4303 s = bfd_get_section_by_name (dynobj, ".rela.bss");
4304 if (s && s->size == 0)
4305 s->flags |= SEC_EXCLUDE;
4311 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4312 struct bfd_link_info *info)
4314 if (!info->relocatable)
4316 struct elf_link_hash_entry *h;
4318 /* Force a PT_GNU_STACK segment to be created. */
4319 if (! elf_tdata (output_bfd)->stack_flags)
4320 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4322 /* Define __stacksize if it's not defined yet. */
4323 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4324 FALSE, FALSE, FALSE);
4325 if (! h || h->root.type != bfd_link_hash_defined
4326 || h->type != STT_OBJECT
4329 struct bfd_link_hash_entry *bh = NULL;
4331 if (!(_bfd_generic_link_add_one_symbol
4332 (info, output_bfd, "__stacksize",
4333 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4334 (const char *) NULL, FALSE,
4335 get_elf_backend_data (output_bfd)->collect, &bh)))
4338 h = (struct elf_link_hash_entry *) bh;
4340 h->type = STT_OBJECT;
4347 /* Check whether any of the relocations was optimized away, and
4348 subtract it from the relocation or fixup count. */
4350 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4351 struct bfd_link_info *info,
4353 bfd_boolean *changed)
4355 Elf_Internal_Shdr *symtab_hdr;
4356 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4357 Elf_Internal_Rela *rel, *erel;
4359 if ((sec->flags & SEC_RELOC) == 0
4360 || sec->reloc_count == 0)
4363 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4364 sym_hashes = elf_sym_hashes (abfd);
4365 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4366 if (!elf_bad_symtab (abfd))
4367 sym_hashes_end -= symtab_hdr->sh_info;
4369 rel = elf_section_data (sec)->relocs;
4371 /* Now examine each relocation. */
4372 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4374 struct elf_link_hash_entry *h;
4375 unsigned long r_symndx;
4376 struct bfinfdpic_relocs_info *picrel;
4377 struct _bfinfdpic_dynamic_got_info *dinfo;
4379 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4380 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4383 if (_bfd_elf_section_offset (sec->output_section->owner,
4384 info, sec, rel->r_offset)
4388 r_symndx = ELF32_R_SYM (rel->r_info);
4389 if (r_symndx < symtab_hdr->sh_info)
4393 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4394 while (h->root.type == bfd_link_hash_indirect
4395 || h->root.type == bfd_link_hash_warning)
4396 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4400 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4402 rel->r_addend, NO_INSERT);
4404 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4406 rel->r_addend, NO_INSERT);
4412 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4414 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4415 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4417 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4419 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4426 bfinfdpic_elf_discard_info (bfd *ibfd,
4427 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4428 struct bfd_link_info *info)
4430 bfd_boolean changed = FALSE;
4434 /* Account for relaxation of .eh_frame section. */
4435 for (s = ibfd->sections; s; s = s->next)
4436 if (s->sec_info_type == ELF_INFO_TYPE_EH_FRAME)
4438 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4440 obfd = s->output_section->owner;
4445 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4447 memset (&gpinfo, 0, sizeof (gpinfo));
4448 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4451 /* Clear GOT and PLT assignments. */
4452 htab_traverse (bfinfdpic_relocs_info (info),
4453 _bfinfdpic_reset_got_plt_entries,
4456 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4464 elf32_bfinfdpic_modify_program_headers (bfd *output_bfd,
4465 struct bfd_link_info *info)
4467 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
4468 struct elf_segment_map *m;
4469 Elf_Internal_Phdr *p;
4471 /* objcopy and strip preserve what's already there using
4472 elf32_bfinfdpic_copy_private_bfd_data (). */
4476 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
4477 if (m->p_type == PT_GNU_STACK)
4482 struct elf_link_hash_entry *h;
4484 /* Obtain the pointer to the __stacksize symbol. */
4485 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4486 FALSE, FALSE, FALSE);
4489 while (h->root.type == bfd_link_hash_indirect
4490 || h->root.type == bfd_link_hash_warning)
4491 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4492 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4495 /* Set the header p_memsz from the symbol value. We
4496 intentionally ignore the symbol section. */
4497 if (h && h->root.type == bfd_link_hash_defined)
4498 p->p_memsz = h->root.u.def.value;
4500 p->p_memsz = DEFAULT_STACK_SIZE;
4509 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4510 struct bfd_link_info *info)
4515 dynobj = elf_hash_table (info)->dynobj;
4517 if (bfinfdpic_got_section (info))
4519 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4520 == (bfinfdpic_gotrel_section (info)->reloc_count
4521 * sizeof (Elf32_External_Rel)));
4523 if (bfinfdpic_gotfixup_section (info))
4525 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4526 bfd_vma got_value = hgot->root.u.def.value
4527 + hgot->root.u.def.section->output_section->vma
4528 + hgot->root.u.def.section->output_offset;
4530 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4533 if (bfinfdpic_gotfixup_section (info)->size
4534 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4536 (*_bfd_error_handler)
4537 ("LINKER BUG: .rofixup section size mismatch");
4542 if (elf_hash_table (info)->dynamic_sections_created)
4544 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4545 == (bfinfdpic_pltrel_section (info)->reloc_count
4546 * sizeof (Elf32_External_Rel)));
4549 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4551 if (elf_hash_table (info)->dynamic_sections_created)
4553 Elf32_External_Dyn * dyncon;
4554 Elf32_External_Dyn * dynconend;
4556 BFD_ASSERT (sdyn != NULL);
4558 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4559 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4561 for (; dyncon < dynconend; dyncon++)
4563 Elf_Internal_Dyn dyn;
4565 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4573 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4574 + bfinfdpic_got_section (info)->output_offset
4575 + bfinfdpic_got_initial_offset (info);
4576 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4580 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4581 ->output_section->vma
4582 + bfinfdpic_pltrel_section (info)->output_offset;
4583 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4587 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4588 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4597 /* Adjust a symbol defined by a dynamic object and referenced by a
4601 elf32_bfinfdpic_adjust_dynamic_symbol
4602 (struct bfd_link_info *info,
4603 struct elf_link_hash_entry *h)
4607 dynobj = elf_hash_table (info)->dynobj;
4609 /* Make sure we know what is going on here. */
4610 BFD_ASSERT (dynobj != NULL
4611 && (h->u.weakdef != NULL
4614 && !h->def_regular)));
4616 /* If this is a weak symbol, and there is a real definition, the
4617 processor independent code will have arranged for us to see the
4618 real definition first, and we can just use the same value. */
4619 if (h->u.weakdef != NULL)
4621 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4622 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4623 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4624 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4630 /* Perform any actions needed for dynamic symbols. */
4633 elf32_bfinfdpic_finish_dynamic_symbol
4634 (bfd *output_bfd ATTRIBUTE_UNUSED,
4635 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4636 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4637 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4642 /* Decide whether to attempt to turn absptr or lsda encodings in
4643 shared libraries into pcrel within the given input section. */
4646 bfinfdpic_elf_use_relative_eh_frame
4647 (bfd *input_bfd ATTRIBUTE_UNUSED,
4648 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4649 asection *eh_frame_section ATTRIBUTE_UNUSED)
4651 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4655 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4658 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4659 struct bfd_link_info *info,
4660 asection *osec, bfd_vma offset,
4661 asection *loc_sec, bfd_vma loc_offset,
4664 struct elf_link_hash_entry *h;
4666 h = elf_hash_table (info)->hgot;
4667 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4669 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4670 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4671 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4672 loc_sec, loc_offset, encoded);
4674 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4675 == (_bfinfdpic_osec_to_segment
4676 (abfd, h->root.u.def.section->output_section)));
4678 *encoded = osec->vma + offset
4679 - (h->root.u.def.value
4680 + h->root.u.def.section->output_section->vma
4681 + h->root.u.def.section->output_offset);
4683 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4688 /* Look through the relocs for a section during the first phase.
4690 Besides handling virtual table relocs for gc, we have to deal with
4691 all sorts of PIC-related relocations. We describe below the
4692 general plan on how to handle such relocations, even though we only
4693 collect information at this point, storing them in hash tables for
4694 perusal of later passes.
4696 32 relocations are propagated to the linker output when creating
4697 position-independent output. LO16 and HI16 relocations are not
4698 supposed to be encountered in this case.
4700 LABEL16 should always be resolvable by the linker, since it's only
4703 LABEL24, on the other hand, is used by calls. If it turns out that
4704 the target of a call is a dynamic symbol, a PLT entry must be
4705 created for it, which triggers the creation of a private function
4706 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4708 GPREL relocations require the referenced symbol to be in the same
4709 segment as _gp, but this can only be checked later.
4711 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4712 exist. LABEL24 might as well, since it may require a PLT entry,
4713 that will require a got.
4715 Non-FUNCDESC GOT relocations require a GOT entry to be created
4716 regardless of whether the symbol is dynamic. However, since a
4717 global symbol that turns out to not be exported may have the same
4718 address of a non-dynamic symbol, we don't assign GOT entries at
4719 this point, such that we can share them in this case. A relocation
4720 for the GOT entry always has to be created, be it to offset a
4721 private symbol by the section load address, be it to get the symbol
4722 resolved dynamically.
4724 FUNCDESC GOT relocations require a GOT entry to be created, and
4725 handled as if a FUNCDESC relocation was applied to the GOT entry in
4728 FUNCDESC relocations referencing a symbol that turns out to NOT be
4729 dynamic cause a private function descriptor to be created. The
4730 FUNCDESC relocation then decays to a 32 relocation that points at
4731 the private descriptor. If the symbol is dynamic, the FUNCDESC
4732 relocation is propagated to the linker output, such that the
4733 dynamic linker creates the canonical descriptor, pointing to the
4734 dynamically-resolved definition of the function.
4736 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4737 symbols that are assigned to the same segment as the GOT, but we
4738 can only check this later, after we know the complete set of
4739 symbols defined and/or exported.
4741 FUNCDESC GOTOFF relocations require a function descriptor to be
4742 created and, unless lazy binding is disabled or the symbol is not
4743 dynamic, a lazy PLT entry. Since we can't tell at this point
4744 whether a symbol is going to be dynamic, we have to decide later
4745 whether to create a lazy PLT entry or bind the descriptor directly
4746 to the private function.
4748 FUNCDESC_VALUE relocations are not supposed to be present in object
4749 files, but they may very well be simply propagated to the linker
4750 output, since they have no side effect.
4753 A function descriptor always requires a FUNCDESC_VALUE relocation.
4754 Whether it's in .plt.rel or not depends on whether lazy binding is
4755 enabled and on whether the referenced symbol is dynamic.
4757 The existence of a lazy PLT requires the resolverStub lazy PLT
4758 entry to be present.
4761 As for assignment of GOT, PLT and lazy PLT entries, and private
4762 descriptors, we might do them all sequentially, but we can do
4763 better than that. For example, we can place GOT entries and
4764 private function descriptors referenced using 12-bit operands
4765 closer to the PIC register value, such that these relocations don't
4766 overflow. Those that are only referenced with LO16 relocations
4767 could come next, but we may as well place PLT-required function
4768 descriptors in the 12-bit range to make them shorter. Symbols
4769 referenced with LO16/HI16 may come next, but we may place
4770 additional function descriptors in the 16-bit range if we can
4771 reliably tell that we've already placed entries that are ever
4772 referenced with only LO16. PLT entries are therefore generated as
4773 small as possible, while not introducing relocation overflows in
4774 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4775 generated before or after PLT entries, but not intermingled with
4776 them, such that we can have more lazy PLT entries in range for a
4777 branch to the resolverStub. The resolverStub should be emitted at
4778 the most distant location from the first lazy PLT entry such that
4779 it's still in range for a branch, or closer, if there isn't a need
4780 for so many lazy PLT entries. Additional lazy PLT entries may be
4781 emitted after the resolverStub, as long as branches are still in
4782 range. If the branch goes out of range, longer lazy PLT entries
4785 We could further optimize PLT and lazy PLT entries by giving them
4786 priority in assignment to closer-to-gr17 locations depending on the
4787 number of occurrences of references to them (assuming a function
4788 that's called more often is more important for performance, so its
4789 PLT entry should be faster), or taking hints from the compiler.
4790 Given infinite time and money... :-) */
4793 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4794 asection *sec, const Elf_Internal_Rela *relocs)
4796 Elf_Internal_Shdr *symtab_hdr;
4797 struct elf_link_hash_entry **sym_hashes;
4798 const Elf_Internal_Rela *rel;
4799 const Elf_Internal_Rela *rel_end;
4801 struct bfinfdpic_relocs_info *picrel;
4803 if (info->relocatable)
4806 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4807 sym_hashes = elf_sym_hashes (abfd);
4809 dynobj = elf_hash_table (info)->dynobj;
4810 rel_end = relocs + sec->reloc_count;
4811 for (rel = relocs; rel < rel_end; rel++)
4813 struct elf_link_hash_entry *h;
4814 unsigned long r_symndx;
4816 r_symndx = ELF32_R_SYM (rel->r_info);
4817 if (r_symndx < symtab_hdr->sh_info)
4820 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4822 switch (ELF32_R_TYPE (rel->r_info))
4824 case R_BFIN_GOT17M4:
4827 case R_BFIN_FUNCDESC_GOT17M4:
4828 case R_BFIN_FUNCDESC_GOTHI:
4829 case R_BFIN_FUNCDESC_GOTLO:
4830 case R_BFIN_GOTOFF17M4:
4831 case R_BFIN_GOTOFFHI:
4832 case R_BFIN_GOTOFFLO:
4833 case R_BFIN_FUNCDESC_GOTOFF17M4:
4834 case R_BFIN_FUNCDESC_GOTOFFHI:
4835 case R_BFIN_FUNCDESC_GOTOFFLO:
4836 case R_BFIN_FUNCDESC:
4837 case R_BFIN_FUNCDESC_VALUE:
4838 if (! IS_FDPIC (abfd))
4841 case R_BFIN_PCREL24:
4842 case R_BFIN_PCREL24_JUMP_L:
4843 case R_BFIN_BYTE4_DATA:
4844 if (IS_FDPIC (abfd) && ! dynobj)
4846 elf_hash_table (info)->dynobj = dynobj = abfd;
4847 if (! _bfin_create_got_section (abfd, info))
4850 if (! IS_FDPIC (abfd))
4857 if (h->dynindx == -1)
4858 switch (ELF_ST_VISIBILITY (h->other))
4864 bfd_elf_link_record_dynamic_symbol (info, h);
4868 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4870 rel->r_addend, INSERT);
4873 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4874 (info), abfd, r_symndx,
4875 rel->r_addend, INSERT);
4885 switch (ELF32_R_TYPE (rel->r_info))
4887 case R_BFIN_PCREL24:
4888 case R_BFIN_PCREL24_JUMP_L:
4889 if (IS_FDPIC (abfd))
4893 case R_BFIN_FUNCDESC_VALUE:
4894 picrel->relocsfdv++;
4895 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4899 case R_BFIN_BYTE4_DATA:
4900 if (! IS_FDPIC (abfd))
4904 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4908 case R_BFIN_GOT17M4:
4917 case R_BFIN_FUNCDESC_GOT17M4:
4918 picrel->fdgot17m4++;
4921 case R_BFIN_FUNCDESC_GOTHI:
4922 case R_BFIN_FUNCDESC_GOTLO:
4923 picrel->fdgothilo++;
4926 case R_BFIN_GOTOFF17M4:
4927 case R_BFIN_GOTOFFHI:
4928 case R_BFIN_GOTOFFLO:
4932 case R_BFIN_FUNCDESC_GOTOFF17M4:
4933 picrel->fdgoff17m4++;
4936 case R_BFIN_FUNCDESC_GOTOFFHI:
4937 case R_BFIN_FUNCDESC_GOTOFFLO:
4938 picrel->fdgoffhilo++;
4941 case R_BFIN_FUNCDESC:
4946 /* This relocation describes the C++ object vtable hierarchy.
4947 Reconstruct it for later use during GC. */
4948 case R_BFIN_GNU_VTINHERIT:
4949 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4953 /* This relocation describes which C++ vtable entries are actually
4954 used. Record for later use during GC. */
4955 case R_BFIN_GNU_VTENTRY:
4956 BFD_ASSERT (h != NULL);
4958 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4962 case R_BFIN_HUIMM16:
4963 case R_BFIN_LUIMM16:
4964 case R_BFIN_PCREL12_JUMP_S:
4965 case R_BFIN_PCREL10:
4970 (*_bfd_error_handler)
4971 (_("%B: unsupported relocation type %i"),
4972 abfd, ELF32_R_TYPE (rel->r_info));
4980 /* Set the right machine number for a Blackfin ELF file. */
4983 elf32_bfin_object_p (bfd *abfd)
4985 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4986 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4987 == (IS_FDPIC (abfd)));
4991 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4993 elf_elfheader (abfd)->e_flags = flags;
4994 elf_flags_init (abfd) = TRUE;
4998 /* Copy backend specific data from one object module to another. */
5001 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5003 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5004 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5007 BFD_ASSERT (!elf_flags_init (obfd)
5008 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
5010 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
5011 elf_flags_init (obfd) = TRUE;
5013 /* Copy object attributes. */
5014 _bfd_elf_copy_obj_attributes (ibfd, obfd);
5020 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5024 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5025 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5028 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
5031 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
5032 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
5035 /* Copy the stack size. */
5036 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
5037 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
5039 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
5041 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
5042 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
5044 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
5046 /* Rewrite the phdrs, since we're only called after they
5047 were first written. */
5048 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
5049 ->s->sizeof_ehdr, SEEK_SET) != 0
5050 || get_elf_backend_data (obfd)->s
5051 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
5052 elf_elfheader (obfd)->e_phnum) != 0)
5064 /* Display the flags field. */
5066 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
5068 FILE *file = (FILE *) ptr;
5071 BFD_ASSERT (abfd != NULL && ptr != NULL);
5073 /* Print normal ELF private data. */
5074 _bfd_elf_print_private_bfd_data (abfd, ptr);
5076 flags = elf_elfheader (abfd)->e_flags;
5078 /* xgettext:c-format */
5079 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5081 if (flags & EF_BFIN_PIC)
5082 fprintf (file, " -fpic");
5084 if (flags & EF_BFIN_FDPIC)
5085 fprintf (file, " -mfdpic");
5092 /* Merge backend specific data from an object file to the output
5093 object file when linking. */
5096 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5098 flagword old_flags, new_flags;
5099 bfd_boolean error = FALSE;
5101 new_flags = elf_elfheader (ibfd)->e_flags;
5102 old_flags = elf_elfheader (obfd)->e_flags;
5104 if (new_flags & EF_BFIN_FDPIC)
5105 new_flags &= ~EF_BFIN_PIC;
5108 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
5109 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
5110 bfd_get_filename (ibfd));
5113 if (!elf_flags_init (obfd)) /* First call, no flags set. */
5115 elf_flags_init (obfd) = TRUE;
5116 elf_elfheader (obfd)->e_flags = new_flags;
5119 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
5122 if (IS_FDPIC (obfd))
5123 (*_bfd_error_handler)
5124 (_("%s: cannot link non-fdpic object file into fdpic executable"),
5125 bfd_get_filename (ibfd));
5127 (*_bfd_error_handler)
5128 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5129 bfd_get_filename (ibfd));
5133 bfd_set_error (bfd_error_bad_value);
5138 /* bfin ELF linker hash entry. */
5140 struct bfin_link_hash_entry
5142 struct elf_link_hash_entry root;
5144 /* Number of PC relative relocs copied for this symbol. */
5145 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5148 /* bfin ELF linker hash table. */
5150 struct bfin_link_hash_table
5152 struct elf_link_hash_table root;
5154 /* Small local sym cache. */
5155 struct sym_cache sym_cache;
5158 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5160 static struct bfd_hash_entry *
5161 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5162 struct bfd_hash_table *table, const char *string)
5164 struct bfd_hash_entry *ret = entry;
5166 /* Allocate the structure if it has not already been allocated by a
5169 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5173 /* Call the allocation method of the superclass. */
5174 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5176 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5181 /* Create an bfin ELF linker hash table. */
5183 static struct bfd_link_hash_table *
5184 bfin_link_hash_table_create (bfd * abfd)
5186 struct bfin_link_hash_table *ret;
5187 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5189 ret = bfd_zalloc (abfd, amt);
5193 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5194 bfin_link_hash_newfunc,
5195 sizeof (struct elf_link_hash_entry)))
5201 ret->sym_cache.abfd = NULL;
5203 return &ret->root.root;
5206 /* The size in bytes of an entry in the procedure linkage table. */
5208 /* Finish up the dynamic sections. */
5211 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5212 struct bfd_link_info *info)
5217 dynobj = elf_hash_table (info)->dynobj;
5219 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5221 if (elf_hash_table (info)->dynamic_sections_created)
5223 Elf32_External_Dyn *dyncon, *dynconend;
5225 BFD_ASSERT (sdyn != NULL);
5227 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5228 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5229 for (; dyncon < dynconend; dyncon++)
5231 Elf_Internal_Dyn dyn;
5233 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5241 /* Finish up dynamic symbol handling. We set the contents of various
5242 dynamic sections here. */
5245 bfin_finish_dynamic_symbol (bfd * output_bfd,
5246 struct bfd_link_info *info,
5247 struct elf_link_hash_entry *h,
5248 Elf_Internal_Sym * sym)
5252 dynobj = elf_hash_table (info)->dynobj;
5254 if (h->got.offset != (bfd_vma) - 1)
5258 Elf_Internal_Rela rela;
5261 /* This symbol has an entry in the global offset table.
5264 sgot = bfd_get_section_by_name (dynobj, ".got");
5265 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5266 BFD_ASSERT (sgot != NULL && srela != NULL);
5268 rela.r_offset = (sgot->output_section->vma
5269 + sgot->output_offset
5270 + (h->got.offset & ~(bfd_vma) 1));
5272 /* If this is a -Bsymbolic link, and the symbol is defined
5273 locally, we just want to emit a RELATIVE reloc. Likewise if
5274 the symbol was forced to be local because of a version file.
5275 The entry in the global offset table will already have been
5276 initialized in the relocate_section function. */
5279 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5281 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5282 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5283 rela.r_addend = bfd_get_signed_32 (output_bfd,
5287 offset & ~(bfd_vma) 1)));
5291 bfd_put_32 (output_bfd, (bfd_vma) 0,
5292 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5293 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5297 loc = srela->contents;
5298 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5299 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5306 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5307 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5308 || h == elf_hash_table (info)->hgot)
5309 sym->st_shndx = SHN_ABS;
5314 /* Adjust a symbol defined by a dynamic object and referenced by a
5315 regular object. The current definition is in some section of the
5316 dynamic object, but we're not including those sections. We have to
5317 change the definition to something the rest of the link can
5321 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5322 struct elf_link_hash_entry *h)
5326 unsigned int power_of_two;
5328 dynobj = elf_hash_table (info)->dynobj;
5330 /* Make sure we know what is going on here. */
5331 BFD_ASSERT (dynobj != NULL
5333 || h->u.weakdef != NULL
5334 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5336 /* If this is a function, put it in the procedure linkage table. We
5337 will fill in the contents of the procedure linkage table later,
5338 when we know the address of the .got section. */
5339 if (h->type == STT_FUNC || h->needs_plt)
5344 /* If this is a weak symbol, and there is a real definition, the
5345 processor independent code will have arranged for us to see the
5346 real definition first, and we can just use the same value. */
5347 if (h->u.weakdef != NULL)
5349 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5350 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5351 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5352 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5356 /* This is a reference to a symbol defined by a dynamic object which
5357 is not a function. */
5359 /* If we are creating a shared library, we must presume that the
5360 only references to the symbol are via the global offset table.
5361 For such cases we need not do anything here; the relocations will
5362 be handled correctly by relocate_section. */
5366 /* We must allocate the symbol in our .dynbss section, which will
5367 become part of the .bss section of the executable. There will be
5368 an entry for this symbol in the .dynsym section. The dynamic
5369 object will contain position independent code, so all references
5370 from the dynamic object to this symbol will go through the global
5371 offset table. The dynamic linker will use the .dynsym entry to
5372 determine the address it must put in the global offset table, so
5373 both the dynamic object and the regular object will refer to the
5374 same memory location for the variable. */
5376 s = bfd_get_section_by_name (dynobj, ".dynbss");
5377 BFD_ASSERT (s != NULL);
5379 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5380 copy the initial value out of the dynamic object and into the
5381 runtime process image. We need to remember the offset into the
5382 .rela.bss section we are going to use. */
5383 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5387 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5388 BFD_ASSERT (srel != NULL);
5389 srel->size += sizeof (Elf32_External_Rela);
5393 /* We need to figure out the alignment required for this symbol. I
5394 have no idea how ELF linkers handle this. */
5395 power_of_two = bfd_log2 (h->size);
5396 if (power_of_two > 3)
5399 /* Apply the required alignment. */
5400 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5401 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5403 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5407 /* Define the symbol as being at this point in the section. */
5408 h->root.u.def.section = s;
5409 h->root.u.def.value = s->size;
5411 /* Increment the section size to make room for the symbol. */
5417 /* The bfin linker needs to keep track of the number of relocs that it
5418 decides to copy in check_relocs for each symbol. This is so that it
5419 can discard PC relative relocs if it doesn't need them when linking
5420 with -Bsymbolic. We store the information in a field extending the
5421 regular ELF linker hash table. */
5423 /* This structure keeps track of the number of PC relative relocs we have
5424 copied for a given symbol. */
5426 struct bfin_pcrel_relocs_copied
5429 struct bfin_pcrel_relocs_copied *next;
5430 /* A section in dynobj. */
5432 /* Number of relocs copied in this section. */
5433 bfd_size_type count;
5436 /* This function is called via elf_link_hash_traverse if we are
5437 creating a shared object. In the -Bsymbolic case it discards the
5438 space allocated to copy PC relative relocs against symbols which
5439 are defined in regular objects. For the normal shared case, it
5440 discards space for pc-relative relocs that have become local due to
5441 symbol visibility changes. We allocated space for them in the
5442 check_relocs routine, but we won't fill them in in the
5443 relocate_section routine.
5445 We also check whether any of the remaining relocations apply
5446 against a readonly section, and set the DF_TEXTREL flag in this
5450 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5452 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5453 struct bfin_pcrel_relocs_copied *s;
5455 if (h->root.type == bfd_link_hash_warning)
5456 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5458 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5460 if ((info->flags & DF_TEXTREL) == 0)
5462 /* Look for relocations against read-only sections. */
5463 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5464 s != NULL; s = s->next)
5465 if ((s->section->flags & SEC_READONLY) != 0)
5467 info->flags |= DF_TEXTREL;
5475 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5476 s != NULL; s = s->next)
5477 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5483 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5484 struct bfd_link_info *info)
5490 dynobj = elf_hash_table (info)->dynobj;
5491 BFD_ASSERT (dynobj != NULL);
5493 if (elf_hash_table (info)->dynamic_sections_created)
5495 /* Set the contents of the .interp section to the interpreter. */
5496 if (info->executable)
5498 s = bfd_get_section_by_name (dynobj, ".interp");
5499 BFD_ASSERT (s != NULL);
5500 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5501 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5506 /* We may have created entries in the .rela.got section.
5507 However, if we are not creating the dynamic sections, we will
5508 not actually use these entries. Reset the size of .rela.got,
5509 which will cause it to get stripped from the output file
5511 s = bfd_get_section_by_name (dynobj, ".rela.got");
5516 /* If this is a -Bsymbolic shared link, then we need to discard all
5517 PC relative relocs against symbols defined in a regular object.
5518 For the normal shared case we discard the PC relative relocs
5519 against symbols that have become local due to visibility changes.
5520 We allocated space for them in the check_relocs routine, but we
5521 will not fill them in in the relocate_section routine. */
5523 elf_link_hash_traverse (elf_hash_table (info),
5524 bfin_discard_copies, (PTR) info);
5526 /* The check_relocs and adjust_dynamic_symbol entry points have
5527 determined the sizes of the various dynamic sections. Allocate
5530 for (s = dynobj->sections; s != NULL; s = s->next)
5535 if ((s->flags & SEC_LINKER_CREATED) == 0)
5538 /* It's OK to base decisions on the section name, because none
5539 of the dynobj section names depend upon the input files. */
5540 name = bfd_get_section_name (dynobj, s);
5544 if (CONST_STRNEQ (name, ".rela"))
5548 /* If we don't need this section, strip it from the
5549 output file. This is mostly to handle .rela.bss and
5550 .rela.plt. We must create both sections in
5551 create_dynamic_sections, because they must be created
5552 before the linker maps input sections to output
5553 sections. The linker does that before
5554 adjust_dynamic_symbol is called, and it is that
5555 function which decides whether anything needs to go
5556 into these sections. */
5563 /* We use the reloc_count field as a counter if we need
5564 to copy relocs into the output file. */
5568 else if (! CONST_STRNEQ (name, ".got"))
5570 /* It's not one of our sections, so don't allocate space. */
5576 s->flags |= SEC_EXCLUDE;
5580 /* Allocate memory for the section contents. */
5581 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5582 Unused entries should be reclaimed before the section's contents
5583 are written out, but at the moment this does not happen. Thus in
5584 order to prevent writing out garbage, we initialise the section's
5585 contents to zero. */
5586 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5587 if (s->contents == NULL && s->size != 0)
5591 if (elf_hash_table (info)->dynamic_sections_created)
5593 /* Add some entries to the .dynamic section. We fill in the
5594 values later, in bfin_finish_dynamic_sections, but we
5595 must add the entries now so that we get the correct size for
5596 the .dynamic section. The DT_DEBUG entry is filled in by the
5597 dynamic linker and used by the debugger. */
5598 #define add_dynamic_entry(TAG, VAL) \
5599 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5603 if (!add_dynamic_entry (DT_DEBUG, 0))
5610 if (!add_dynamic_entry (DT_RELA, 0)
5611 || !add_dynamic_entry (DT_RELASZ, 0)
5612 || !add_dynamic_entry (DT_RELAENT,
5613 sizeof (Elf32_External_Rela)))
5617 if ((info->flags & DF_TEXTREL) != 0)
5619 if (!add_dynamic_entry (DT_TEXTREL, 0))
5623 #undef add_dynamic_entry
5628 /* Given a .data section and a .emreloc in-memory section, store
5629 relocation information into the .emreloc section which can be
5630 used at runtime to relocate the section. This is called by the
5631 linker when the --embedded-relocs switch is used. This is called
5632 after the add_symbols entry point has been called for all the
5633 objects, and before the final_link entry point is called. */
5635 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5636 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5639 bfd_bfin_elf32_create_embedded_relocs (
5641 struct bfd_link_info *info,
5646 Elf_Internal_Shdr *symtab_hdr;
5647 Elf_Internal_Sym *isymbuf = NULL;
5648 Elf_Internal_Rela *internal_relocs = NULL;
5649 Elf_Internal_Rela *irel, *irelend;
5653 BFD_ASSERT (! info->relocatable);
5657 if (datasec->reloc_count == 0)
5660 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5662 /* Get a copy of the native relocations. */
5663 internal_relocs = (_bfd_elf_link_read_relocs
5664 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5665 info->keep_memory));
5666 if (internal_relocs == NULL)
5669 amt = (bfd_size_type) datasec->reloc_count * 12;
5670 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5671 if (relsec->contents == NULL)
5674 p = relsec->contents;
5676 irelend = internal_relocs + datasec->reloc_count;
5677 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5679 asection *targetsec;
5681 /* We are going to write a four byte longword into the runtime
5682 reloc section. The longword will be the address in the data
5683 section which must be relocated. It is followed by the name
5684 of the target section NUL-padded or truncated to 8
5687 /* We can only relocate absolute longword relocs at run time. */
5688 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5690 *errmsg = _("unsupported reloc type");
5691 bfd_set_error (bfd_error_bad_value);
5695 /* Get the target section referred to by the reloc. */
5696 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5698 /* A local symbol. */
5699 Elf_Internal_Sym *isym;
5701 /* Read this BFD's local symbols if we haven't done so already. */
5702 if (isymbuf == NULL)
5704 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5705 if (isymbuf == NULL)
5706 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5707 symtab_hdr->sh_info, 0,
5709 if (isymbuf == NULL)
5713 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5714 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5719 struct elf_link_hash_entry *h;
5721 /* An external symbol. */
5722 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5723 h = elf_sym_hashes (abfd)[indx];
5724 BFD_ASSERT (h != NULL);
5725 if (h->root.type == bfd_link_hash_defined
5726 || h->root.type == bfd_link_hash_defweak)
5727 targetsec = h->root.u.def.section;
5732 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5733 memset (p + 4, 0, 8);
5734 if (targetsec != NULL)
5735 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5738 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5740 if (internal_relocs != NULL
5741 && elf_section_data (datasec)->relocs != internal_relocs)
5742 free (internal_relocs);
5746 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5748 if (internal_relocs != NULL
5749 && elf_section_data (datasec)->relocs != internal_relocs)
5750 free (internal_relocs);
5754 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5756 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5757 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5758 { NULL, 0, 0, 0, 0 }
5762 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5763 #define TARGET_LITTLE_NAME "elf32-bfin"
5764 #define ELF_ARCH bfd_arch_bfin
5765 #define ELF_MACHINE_CODE EM_BLACKFIN
5766 #define ELF_MAXPAGESIZE 0x1000
5767 #define elf_symbol_leading_char '_'
5769 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5770 #define bfd_elf32_bfd_reloc_name_lookup \
5771 bfin_bfd_reloc_name_lookup
5772 #define elf_info_to_howto bfin_info_to_howto
5773 #define elf_info_to_howto_rel 0
5774 #define elf_backend_object_p elf32_bfin_object_p
5776 #define bfd_elf32_bfd_is_local_label_name \
5777 bfin_is_local_label_name
5778 #define bfin_hash_table(p) \
5779 ((struct bfin_link_hash_table *) (p)->hash)
5783 #define elf_backend_create_dynamic_sections \
5784 _bfd_elf_create_dynamic_sections
5785 #define bfd_elf32_bfd_link_hash_table_create \
5786 bfin_link_hash_table_create
5787 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5789 #define elf_backend_check_relocs bfin_check_relocs
5790 #define elf_backend_adjust_dynamic_symbol \
5791 bfin_adjust_dynamic_symbol
5792 #define elf_backend_size_dynamic_sections \
5793 bfin_size_dynamic_sections
5794 #define elf_backend_relocate_section bfin_relocate_section
5795 #define elf_backend_finish_dynamic_symbol \
5796 bfin_finish_dynamic_symbol
5797 #define elf_backend_finish_dynamic_sections \
5798 bfin_finish_dynamic_sections
5799 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5800 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5801 #define bfd_elf32_bfd_merge_private_bfd_data \
5802 elf32_bfin_merge_private_bfd_data
5803 #define bfd_elf32_bfd_set_private_flags \
5804 elf32_bfin_set_private_flags
5805 #define bfd_elf32_bfd_print_private_bfd_data \
5806 elf32_bfin_print_private_bfd_data
5807 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5808 #define elf_backend_can_gc_sections 1
5809 #define elf_backend_special_sections elf32_bfin_special_sections
5810 #define elf_backend_can_refcount 1
5811 #define elf_backend_want_got_plt 0
5812 #define elf_backend_plt_readonly 1
5813 #define elf_backend_want_plt_sym 0
5814 #define elf_backend_got_header_size 12
5815 #define elf_backend_rela_normal 1
5817 #include "elf32-target.h"
5819 #undef TARGET_LITTLE_SYM
5820 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5821 #undef TARGET_LITTLE_NAME
5822 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5824 #define elf32_bed elf32_bfinfdpic_bed
5826 #undef elf_backend_gc_sweep_hook
5827 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5829 #undef elf_backend_got_header_size
5830 #define elf_backend_got_header_size 0
5832 #undef elf_backend_relocate_section
5833 #define elf_backend_relocate_section bfinfdpic_relocate_section
5834 #undef elf_backend_check_relocs
5835 #define elf_backend_check_relocs bfinfdpic_check_relocs
5837 #undef bfd_elf32_bfd_link_hash_table_create
5838 #define bfd_elf32_bfd_link_hash_table_create \
5839 bfinfdpic_elf_link_hash_table_create
5840 #undef elf_backend_always_size_sections
5841 #define elf_backend_always_size_sections \
5842 elf32_bfinfdpic_always_size_sections
5843 #undef elf_backend_modify_program_headers
5844 #define elf_backend_modify_program_headers \
5845 elf32_bfinfdpic_modify_program_headers
5846 #undef bfd_elf32_bfd_copy_private_bfd_data
5847 #define bfd_elf32_bfd_copy_private_bfd_data \
5848 elf32_bfinfdpic_copy_private_bfd_data
5850 #undef elf_backend_create_dynamic_sections
5851 #define elf_backend_create_dynamic_sections \
5852 elf32_bfinfdpic_create_dynamic_sections
5853 #undef elf_backend_adjust_dynamic_symbol
5854 #define elf_backend_adjust_dynamic_symbol \
5855 elf32_bfinfdpic_adjust_dynamic_symbol
5856 #undef elf_backend_size_dynamic_sections
5857 #define elf_backend_size_dynamic_sections \
5858 elf32_bfinfdpic_size_dynamic_sections
5859 #undef elf_backend_finish_dynamic_symbol
5860 #define elf_backend_finish_dynamic_symbol \
5861 elf32_bfinfdpic_finish_dynamic_symbol
5862 #undef elf_backend_finish_dynamic_sections
5863 #define elf_backend_finish_dynamic_sections \
5864 elf32_bfinfdpic_finish_dynamic_sections
5866 #undef elf_backend_discard_info
5867 #define elf_backend_discard_info \
5868 bfinfdpic_elf_discard_info
5869 #undef elf_backend_can_make_relative_eh_frame
5870 #define elf_backend_can_make_relative_eh_frame \
5871 bfinfdpic_elf_use_relative_eh_frame
5872 #undef elf_backend_can_make_lsda_relative_eh_frame
5873 #define elf_backend_can_make_lsda_relative_eh_frame \
5874 bfinfdpic_elf_use_relative_eh_frame
5875 #undef elf_backend_encode_eh_address
5876 #define elf_backend_encode_eh_address \
5877 bfinfdpic_elf_encode_eh_address
5879 #undef elf_backend_may_use_rel_p
5880 #define elf_backend_may_use_rel_p 1
5881 #undef elf_backend_may_use_rela_p
5882 #define elf_backend_may_use_rela_p 1
5883 /* We use REL for dynamic relocations only. */
5884 #undef elf_backend_default_use_rela_p
5885 #define elf_backend_default_use_rela_p 1
5887 #undef elf_backend_omit_section_dynsym
5888 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5890 #include "elf32-target.h"