1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007 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. */
26 #include "elf/dwarf2.h"
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_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_unused0", /* name. */
433 FALSE, /* partial_inplace. */
436 FALSE), /* pcrel_offset. */
438 HOWTO (R_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_pcrel5m2", /* name. */
447 FALSE, /* partial_inplace. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
452 HOWTO (R_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_unused1", /* name. */
461 FALSE, /* partial_inplace. */
464 FALSE), /* pcrel_offset. */
466 HOWTO (R_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_pcrel10", /* name. */
475 FALSE, /* partial_inplace. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
480 HOWTO (R_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_pcrel12_jump", /* name. */
493 FALSE, /* partial_inplace. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
498 HOWTO (R_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_rimm16", /* name. */
507 FALSE, /* partial_inplace. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
512 HOWTO (R_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_luimm16", /* name. */
521 FALSE, /* partial_inplace. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
526 HOWTO (R_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_huimm16", /* name. */
535 FALSE, /* partial_inplace. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
540 HOWTO (R_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_pcrel12_jump_s", /* name. */
549 FALSE, /* partial_inplace. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
554 HOWTO (R_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_pcrel24_jump_x", /* name. */
563 FALSE, /* partial_inplace. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
568 HOWTO (R_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_pcrel24", /* name. */
577 FALSE, /* partial_inplace. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
582 HOWTO (R_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_unusedb", /* name. */
591 FALSE, /* partial_inplace. */
594 FALSE), /* pcrel_offset. */
596 HOWTO (R_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_unusedc", /* name. */
605 FALSE, /* partial_inplace. */
608 FALSE), /* pcrel_offset. */
610 HOWTO (R_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_pcrel24_jump_l", /* name. */
619 FALSE, /* partial_inplace. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
624 HOWTO (R_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_pcrel24_call_x", /* name. */
633 FALSE, /* partial_inplace. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
638 HOWTO (R_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_var_eq_symb", /* name. */
647 FALSE, /* partial_inplace. */
650 FALSE), /* pcrel_offset. */
652 HOWTO (R_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_byte_data", /* name. */
661 FALSE, /* partial_inplace. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
666 HOWTO (R_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_byte2_data", /* name. */
675 FALSE, /* partial_inplace. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
680 HOWTO (R_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_byte4_data", /* name. */
689 FALSE, /* partial_inplace. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
694 HOWTO (R_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_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_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_pltpc", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
948 HOWTO (R_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. */
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_unused0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 },
1003 { BFD_RELOC_NONE, R_unused1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_pcrel10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump },
1006 { BFD_RELOC_BFIN_16_IMM, R_rimm16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_luimm16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_huimm16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s },
1010 { BFD_RELOC_24_PCREL, R_pcrel24 },
1011 { BFD_RELOC_24_PCREL, R_pcrel24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l },
1013 { BFD_RELOC_NONE, R_unusedb },
1014 { BFD_RELOC_NONE, R_unusedc },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x },
1016 { BFD_RELOC_8, R_byte_data },
1017 { BFD_RELOC_16, R_byte2_data },
1018 { BFD_RELOC_32, R_byte4_data },
1019 { BFD_RELOC_BFIN_11_PCREL, R_pcrel11 },
1020 { BFD_RELOC_BFIN_GOT, R_got },
1021 { BFD_RELOC_BFIN_PLTPC, R_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_pcrel24 || r_type == R_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_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;
1745 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1747 #define bfinfdpic_hash_table(info) \
1748 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1750 #define bfinfdpic_got_section(info) \
1751 (bfinfdpic_hash_table (info)->sgot)
1752 #define bfinfdpic_gotrel_section(info) \
1753 (bfinfdpic_hash_table (info)->sgotrel)
1754 #define bfinfdpic_gotfixup_section(info) \
1755 (bfinfdpic_hash_table (info)->sgotfixup)
1756 #define bfinfdpic_plt_section(info) \
1757 (bfinfdpic_hash_table (info)->splt)
1758 #define bfinfdpic_pltrel_section(info) \
1759 (bfinfdpic_hash_table (info)->spltrel)
1760 #define bfinfdpic_relocs_info(info) \
1761 (bfinfdpic_hash_table (info)->relocs_info)
1762 #define bfinfdpic_got_initial_offset(info) \
1763 (bfinfdpic_hash_table (info)->got0)
1764 #define bfinfdpic_plt_initial_offset(info) \
1765 (bfinfdpic_hash_table (info)->plt0)
1767 /* The name of the dynamic interpreter. This is put in the .interp
1770 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1772 #define DEFAULT_STACK_SIZE 0x20000
1774 /* This structure is used to collect the number of entries present in
1775 each addressable range of the got. */
1776 struct _bfinfdpic_dynamic_got_info
1778 /* Several bits of information about the current link. */
1779 struct bfd_link_info *info;
1780 /* Total size needed for GOT entries within the 18- or 32-bit
1782 bfd_vma got17m4, gothilo;
1783 /* Total size needed for function descriptor entries within the 18-
1784 or 32-bit ranges. */
1785 bfd_vma fd17m4, fdhilo;
1786 /* Total size needed function descriptor entries referenced in PLT
1787 entries, that would be profitable to place in offsets close to
1788 the PIC register. */
1790 /* Total size needed by lazy PLT entries. */
1792 /* Number of relocations carried over from input object files. */
1793 unsigned long relocs;
1794 /* Number of fixups introduced by relocations in input object files. */
1795 unsigned long fixups;
1798 /* Create a Blackfin ELF linker hash table. */
1800 static struct bfd_link_hash_table *
1801 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1803 struct bfinfdpic_elf_link_hash_table *ret;
1804 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1806 ret = bfd_zalloc (abfd, amt);
1810 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1811 _bfd_elf_link_hash_newfunc,
1812 sizeof (struct elf_link_hash_entry)))
1818 return &ret->elf.root;
1821 /* Decide whether a reference to a symbol can be resolved locally or
1822 not. If the symbol is protected, we want the local address, but
1823 its function descriptor must be assigned by the dynamic linker. */
1824 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1825 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1826 || ! elf_hash_table (INFO)->dynamic_sections_created)
1827 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1828 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1830 /* This structure collects information on what kind of GOT, PLT or
1831 function descriptors are required by relocations that reference a
1833 struct bfinfdpic_relocs_info
1835 /* The index of the symbol, as stored in the relocation r_info, if
1836 we have a local symbol; -1 otherwise. */
1840 /* The input bfd in which the symbol is defined, if it's a local
1843 /* If symndx == -1, the hash table entry corresponding to a global
1844 symbol (even if it turns out to bind locally, in which case it
1845 should ideally be replaced with section's symndx + addend). */
1846 struct elf_link_hash_entry *h;
1848 /* The addend of the relocation that references the symbol. */
1851 /* The fields above are used to identify an entry. The fields below
1852 contain information on how an entry is used and, later on, which
1853 locations it was assigned. */
1854 /* The following 2 fields record whether the symbol+addend above was
1855 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1856 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1859 /* Whether a FUNCDESC relocation references symbol+addend. */
1861 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1864 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1865 unsigned fdgoff17m4;
1866 unsigned fdgoffhilo;
1867 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1868 GOTOFFHI relocations. The addend doesn't really matter, since we
1869 envision that this will only be used to check whether the symbol
1870 is mapped to the same segment as the got. */
1872 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1874 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1877 /* Whether we need a PLT entry for a symbol. Should be implied by
1879 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1881 /* Whether a function descriptor should be created in this link unit
1882 for symbol+addend. Should be implied by something like:
1883 (plt || fdgotoff17m4 || fdgotofflohi
1884 || ((fd || fdgot17m4 || fdgothilo)
1885 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1887 /* Whether a lazy PLT entry is needed for this symbol+addend.
1888 Should be implied by something like:
1889 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1890 && ! (info->flags & DF_BIND_NOW)) */
1892 /* Whether we've already emitted GOT relocations and PLT entries as
1893 needed for this symbol. */
1896 /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1897 relocations referencing the symbol. */
1898 unsigned relocs32, relocsfd, relocsfdv;
1900 /* The number of .rofixups entries and dynamic relocations allocated
1901 for this symbol, minus any that might have already been used. */
1902 unsigned fixups, dynrelocs;
1904 /* The offsets of the GOT entries assigned to symbol+addend, to the
1905 function descriptor's address, and to a function descriptor,
1906 respectively. Should be zero if unassigned. The offsets are
1907 counted from the value that will be assigned to the PIC register,
1908 not from the beginning of the .got section. */
1909 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1910 /* The offsets of the PLT entries assigned to symbol+addend,
1911 non-lazy and lazy, respectively. If unassigned, should be
1913 bfd_vma plt_entry, lzplt_entry;
1916 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1918 bfinfdpic_relocs_info_hash (const void *entry_)
1920 const struct bfinfdpic_relocs_info *entry = entry_;
1922 return (entry->symndx == -1
1923 ? (long) entry->d.h->root.root.hash
1924 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1927 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1930 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1932 const struct bfinfdpic_relocs_info *e1 = entry1;
1933 const struct bfinfdpic_relocs_info *e2 = entry2;
1935 return e1->symndx == e2->symndx && e1->addend == e2->addend
1936 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1939 /* Find or create an entry in a hash table HT that matches the key
1940 fields of the given ENTRY. If it's not found, memory for a new
1941 entry is allocated in ABFD's obstack. */
1942 static struct bfinfdpic_relocs_info *
1943 bfinfdpic_relocs_info_find (struct htab *ht,
1945 const struct bfinfdpic_relocs_info *entry,
1946 enum insert_option insert)
1948 struct bfinfdpic_relocs_info **loc =
1949 (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1957 *loc = bfd_zalloc (abfd, sizeof (**loc));
1962 (*loc)->symndx = entry->symndx;
1963 (*loc)->d = entry->d;
1964 (*loc)->addend = entry->addend;
1965 (*loc)->plt_entry = (bfd_vma)-1;
1966 (*loc)->lzplt_entry = (bfd_vma)-1;
1971 /* Obtain the address of the entry in HT associated with H's symbol +
1972 addend, creating a new entry if none existed. ABFD is only used
1973 for memory allocation purposes. */
1974 inline static struct bfinfdpic_relocs_info *
1975 bfinfdpic_relocs_info_for_global (struct htab *ht,
1977 struct elf_link_hash_entry *h,
1979 enum insert_option insert)
1981 struct bfinfdpic_relocs_info entry;
1985 entry.addend = addend;
1987 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1990 /* Obtain the address of the entry in HT associated with the SYMNDXth
1991 local symbol of the input bfd ABFD, plus the addend, creating a new
1992 entry if none existed. */
1993 inline static struct bfinfdpic_relocs_info *
1994 bfinfdpic_relocs_info_for_local (struct htab *ht,
1998 enum insert_option insert)
2000 struct bfinfdpic_relocs_info entry;
2002 entry.symndx = symndx;
2003 entry.d.abfd = abfd;
2004 entry.addend = addend;
2006 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2009 /* Merge fields set by check_relocs() of two entries that end up being
2010 mapped to the same (presumably global) symbol. */
2013 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2014 struct bfinfdpic_relocs_info const *e1)
2016 e2->got17m4 |= e1->got17m4;
2017 e2->gothilo |= e1->gothilo;
2019 e2->fdgot17m4 |= e1->fdgot17m4;
2020 e2->fdgothilo |= e1->fdgothilo;
2021 e2->fdgoff17m4 |= e1->fdgoff17m4;
2022 e2->fdgoffhilo |= e1->fdgoffhilo;
2023 e2->gotoff |= e1->gotoff;
2024 e2->call |= e1->call;
2028 /* Every block of 65535 lazy PLT entries shares a single call to the
2029 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2030 32767, counting from 0). All other lazy PLT entries branch to it
2031 in a single instruction. */
2033 #define LZPLT_RESOLVER_EXTRA 10
2034 #define LZPLT_NORMAL_SIZE 6
2035 #define LZPLT_ENTRIES 1362
2037 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2038 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2040 /* Add a dynamic relocation to the SRELOC section. */
2042 inline static bfd_vma
2043 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2044 int reloc_type, long dynindx, bfd_vma addend,
2045 struct bfinfdpic_relocs_info *entry)
2047 Elf_Internal_Rela outrel;
2048 bfd_vma reloc_offset;
2050 outrel.r_offset = offset;
2051 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2052 outrel.r_addend = addend;
2054 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2055 BFD_ASSERT (reloc_offset < sreloc->size);
2056 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2057 sreloc->contents + reloc_offset);
2058 sreloc->reloc_count++;
2060 /* If the entry's index is zero, this relocation was probably to a
2061 linkonce section that got discarded. We reserved a dynamic
2062 relocation, but it was for another entry than the one we got at
2063 the time of emitting the relocation. Unfortunately there's no
2064 simple way for us to catch this situation, since the relocation
2065 is cleared right before calling relocate_section, at which point
2066 we no longer know what the relocation used to point to. */
2069 BFD_ASSERT (entry->dynrelocs > 0);
2073 return reloc_offset;
2076 /* Add a fixup to the ROFIXUP section. */
2079 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2080 struct bfinfdpic_relocs_info *entry)
2082 bfd_vma fixup_offset;
2084 if (rofixup->flags & SEC_EXCLUDE)
2087 fixup_offset = rofixup->reloc_count * 4;
2088 if (rofixup->contents)
2090 BFD_ASSERT (fixup_offset < rofixup->size);
2091 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2093 rofixup->reloc_count++;
2095 if (entry && entry->symndx)
2097 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2099 BFD_ASSERT (entry->fixups > 0);
2103 return fixup_offset;
2106 /* Find the segment number in which OSEC, and output section, is
2110 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2112 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2114 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2117 inline static bfd_boolean
2118 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2120 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2122 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2125 /* Generate relocations for GOT entries, function descriptors, and
2126 code for PLT and lazy PLT entries. */
2128 inline static bfd_boolean
2129 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2131 struct bfd_link_info *info,
2133 Elf_Internal_Sym *sym,
2137 bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
2144 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2146 /* If the symbol is dynamic, consider it for dynamic
2147 relocations, otherwise decay to section + offset. */
2148 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2149 dynindx = entry->d.h->dynindx;
2152 if (sec->output_section
2153 && ! bfd_is_abs_section (sec->output_section)
2154 && ! bfd_is_und_section (sec->output_section))
2155 dynindx = elf_section_data (sec->output_section)->dynindx;
2161 /* Generate relocation for GOT entry pointing to the symbol. */
2162 if (entry->got_entry)
2165 bfd_vma ad = addend;
2167 /* If the symbol is dynamic but binds locally, use
2169 if (sec && (entry->symndx != -1
2170 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2172 if (entry->symndx == -1)
2173 ad += entry->d.h->root.u.def.value;
2175 ad += sym->st_value;
2176 ad += sec->output_offset;
2177 if (sec->output_section && elf_section_data (sec->output_section))
2178 idx = elf_section_data (sec->output_section)->dynindx;
2183 /* If we're linking an executable at a fixed address, we can
2184 omit the dynamic relocation as long as the symbol is local to
2186 if (info->executable && !info->pie
2187 && (entry->symndx != -1
2188 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2191 ad += sec->output_section->vma;
2192 if (entry->symndx != -1
2193 || entry->d.h->root.type != bfd_link_hash_undefweak)
2194 _bfinfdpic_add_rofixup (output_bfd,
2195 bfinfdpic_gotfixup_section (info),
2196 bfinfdpic_got_section (info)->output_section
2198 + bfinfdpic_got_section (info)->output_offset
2199 + bfinfdpic_got_initial_offset (info)
2200 + entry->got_entry, entry);
2203 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2204 _bfd_elf_section_offset
2206 bfinfdpic_got_section (info),
2207 bfinfdpic_got_initial_offset (info)
2209 + bfinfdpic_got_section (info)
2210 ->output_section->vma
2211 + bfinfdpic_got_section (info)->output_offset,
2212 R_byte4_data, idx, ad, entry);
2214 bfd_put_32 (output_bfd, ad,
2215 bfinfdpic_got_section (info)->contents
2216 + bfinfdpic_got_initial_offset (info)
2217 + entry->got_entry);
2220 /* Generate relocation for GOT entry pointing to a canonical
2221 function descriptor. */
2222 if (entry->fdgot_entry)
2227 if (! (entry->symndx == -1
2228 && entry->d.h->root.type == bfd_link_hash_undefweak
2229 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2231 /* If the symbol is dynamic and there may be dynamic symbol
2232 resolution because we are, or are linked with, a shared
2233 library, emit a FUNCDESC relocation such that the dynamic
2234 linker will allocate the function descriptor. If the
2235 symbol needs a non-local function descriptor but binds
2236 locally (e.g., its visibility is protected, emit a
2237 dynamic relocation decayed to section+offset. */
2238 if (entry->symndx == -1
2239 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2240 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2241 && !(info->executable && !info->pie))
2243 reloc = R_BFIN_FUNCDESC;
2244 idx = elf_section_data (entry->d.h->root.u.def.section
2245 ->output_section)->dynindx;
2246 ad = entry->d.h->root.u.def.section->output_offset
2247 + entry->d.h->root.u.def.value;
2249 else if (entry->symndx == -1
2250 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2252 reloc = R_BFIN_FUNCDESC;
2260 /* Otherwise, we know we have a private function descriptor,
2261 so reference it directly. */
2262 if (elf_hash_table (info)->dynamic_sections_created)
2263 BFD_ASSERT (entry->privfd);
2264 reloc = R_byte4_data;
2265 idx = elf_section_data (bfinfdpic_got_section (info)
2266 ->output_section)->dynindx;
2267 ad = bfinfdpic_got_section (info)->output_offset
2268 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2271 /* If there is room for dynamic symbol resolution, emit the
2272 dynamic relocation. However, if we're linking an
2273 executable at a fixed location, we won't have emitted a
2274 dynamic symbol entry for the got section, so idx will be
2275 zero, which means we can and should compute the address
2276 of the private descriptor ourselves. */
2277 if (info->executable && !info->pie
2278 && (entry->symndx != -1
2279 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2281 ad += bfinfdpic_got_section (info)->output_section->vma;
2282 _bfinfdpic_add_rofixup (output_bfd,
2283 bfinfdpic_gotfixup_section (info),
2284 bfinfdpic_got_section (info)
2285 ->output_section->vma
2286 + bfinfdpic_got_section (info)
2288 + bfinfdpic_got_initial_offset (info)
2289 + entry->fdgot_entry, entry);
2292 _bfinfdpic_add_dyn_reloc (output_bfd,
2293 bfinfdpic_gotrel_section (info),
2294 _bfd_elf_section_offset
2296 bfinfdpic_got_section (info),
2297 bfinfdpic_got_initial_offset (info)
2298 + entry->fdgot_entry)
2299 + bfinfdpic_got_section (info)
2300 ->output_section->vma
2301 + bfinfdpic_got_section (info)
2303 reloc, idx, ad, entry);
2306 bfd_put_32 (output_bfd, ad,
2307 bfinfdpic_got_section (info)->contents
2308 + bfinfdpic_got_initial_offset (info)
2309 + entry->fdgot_entry);
2312 /* Generate relocation to fill in a private function descriptor in
2314 if (entry->fd_entry)
2317 bfd_vma ad = addend;
2319 long lowword, highword;
2321 /* If the symbol is dynamic but binds locally, use
2323 if (sec && (entry->symndx != -1
2324 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2326 if (entry->symndx == -1)
2327 ad += entry->d.h->root.u.def.value;
2329 ad += sym->st_value;
2330 ad += sec->output_offset;
2331 if (sec->output_section && elf_section_data (sec->output_section))
2332 idx = elf_section_data (sec->output_section)->dynindx;
2337 /* If we're linking an executable at a fixed address, we can
2338 omit the dynamic relocation as long as the symbol is local to
2340 if (info->executable && !info->pie
2341 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2344 ad += sec->output_section->vma;
2346 if (entry->symndx != -1
2347 || entry->d.h->root.type != bfd_link_hash_undefweak)
2349 _bfinfdpic_add_rofixup (output_bfd,
2350 bfinfdpic_gotfixup_section (info),
2351 bfinfdpic_got_section (info)
2352 ->output_section->vma
2353 + bfinfdpic_got_section (info)
2355 + bfinfdpic_got_initial_offset (info)
2356 + entry->fd_entry, entry);
2357 _bfinfdpic_add_rofixup (output_bfd,
2358 bfinfdpic_gotfixup_section (info),
2359 bfinfdpic_got_section (info)
2360 ->output_section->vma
2361 + bfinfdpic_got_section (info)
2363 + bfinfdpic_got_initial_offset (info)
2364 + entry->fd_entry + 4, entry);
2370 = _bfinfdpic_add_dyn_reloc (output_bfd,
2372 ? bfinfdpic_pltrel_section (info)
2373 : bfinfdpic_gotrel_section (info),
2374 _bfd_elf_section_offset
2376 bfinfdpic_got_section (info),
2377 bfinfdpic_got_initial_offset (info)
2379 + bfinfdpic_got_section (info)
2380 ->output_section->vma
2381 + bfinfdpic_got_section (info)
2383 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2386 /* If we've omitted the dynamic relocation, just emit the fixed
2387 addresses of the symbol and of the local GOT base offset. */
2388 if (info->executable && !info->pie && sec && sec->output_section)
2391 highword = bfinfdpic_got_section (info)->output_section->vma
2392 + bfinfdpic_got_section (info)->output_offset
2393 + bfinfdpic_got_initial_offset (info);
2395 else if (entry->lazyplt)
2400 fd_lazy_rel_offset = ofst;
2402 /* A function descriptor used for lazy or local resolving is
2403 initialized such that its high word contains the output
2404 section index in which the PLT entries are located, and
2405 the low word contains the address of the lazy PLT entry
2406 entry point, that must be within the memory region
2407 assigned to that section. */
2408 lowword = entry->lzplt_entry + 4
2409 + bfinfdpic_plt_section (info)->output_offset
2410 + bfinfdpic_plt_section (info)->output_section->vma;
2411 highword = _bfinfdpic_osec_to_segment
2412 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2416 /* A function descriptor for a local function gets the index
2417 of the section. For a non-local function, it's
2420 if (entry->symndx == -1 && entry->d.h->dynindx != -1
2421 && entry->d.h->dynindx == idx)
2424 highword = _bfinfdpic_osec_to_segment
2425 (output_bfd, sec->output_section);
2428 bfd_put_32 (output_bfd, lowword,
2429 bfinfdpic_got_section (info)->contents
2430 + bfinfdpic_got_initial_offset (info)
2432 bfd_put_32 (output_bfd, highword,
2433 bfinfdpic_got_section (info)->contents
2434 + bfinfdpic_got_initial_offset (info)
2435 + entry->fd_entry + 4);
2438 /* Generate code for the PLT entry. */
2439 if (entry->plt_entry != (bfd_vma) -1)
2441 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2444 BFD_ASSERT (entry->fd_entry);
2446 /* Figure out what kind of PLT entry we need, depending on the
2447 location of the function descriptor within the GOT. */
2448 if (entry->fd_entry >= -(1 << (18 - 1))
2449 && entry->fd_entry + 4 < (1 << (18 - 1)))
2451 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2452 bfd_put_32 (output_bfd,
2453 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2455 bfd_put_32 (output_bfd,
2456 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2462 /* P1.L = fd_entry; P1.H = fd_entry;
2466 bfd_put_32 (output_bfd,
2467 0xe109 | (entry->fd_entry << 16),
2469 bfd_put_32 (output_bfd,
2470 0xe149 | (entry->fd_entry & 0xFFFF0000),
2472 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2473 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2474 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2478 bfd_put_16 (output_bfd, 0x0051, plt_code);
2481 /* Generate code for the lazy PLT entry. */
2482 if (entry->lzplt_entry != (bfd_vma) -1)
2484 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2485 + entry->lzplt_entry;
2486 bfd_vma resolverStub_addr;
2488 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2491 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2492 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2493 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2494 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2496 if (entry->lzplt_entry == resolverStub_addr)
2498 /* This is a lazy PLT entry that includes a resolver call.
2502 bfd_put_32 (output_bfd,
2505 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2509 /* JUMP.S resolverStub */
2510 bfd_put_16 (output_bfd,
2512 | (((resolverStub_addr - entry->lzplt_entry)
2513 / 2) & (((bfd_vma)1 << 12) - 1)),
2521 /* Relocate an Blackfin ELF section.
2523 The RELOCATE_SECTION function is called by the new ELF backend linker
2524 to handle the relocations for a section.
2526 The relocs are always passed as Rela structures; if the section
2527 actually uses Rel structures, the r_addend field will always be
2530 This function is responsible for adjusting the section contents as
2531 necessary, and (if using Rela relocs and generating a relocatable
2532 output file) adjusting the reloc addend as necessary.
2534 This function does not have to worry about setting the reloc
2535 address or the reloc symbol index.
2537 LOCAL_SYMS is a pointer to the swapped in local symbols.
2539 LOCAL_SECTIONS is an array giving the section in the input file
2540 corresponding to the st_shndx field of each local symbol.
2542 The global hash table entry for the global symbols can be found
2543 via elf_sym_hashes (input_bfd).
2545 When generating relocatable output, this function must handle
2546 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2547 going to be the section symbol corresponding to the output
2548 section, which means that the addend must be adjusted
2552 bfinfdpic_relocate_section (bfd * output_bfd,
2553 struct bfd_link_info *info,
2555 asection * input_section,
2556 bfd_byte * contents,
2557 Elf_Internal_Rela * relocs,
2558 Elf_Internal_Sym * local_syms,
2559 asection ** local_sections)
2561 Elf_Internal_Shdr *symtab_hdr;
2562 struct elf_link_hash_entry **sym_hashes;
2563 Elf_Internal_Rela *rel;
2564 Elf_Internal_Rela *relend;
2565 unsigned isec_segment, got_segment, plt_segment,
2567 int silence_segment_error = !(info->shared || info->pie);
2569 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2570 sym_hashes = elf_sym_hashes (input_bfd);
2571 relend = relocs + input_section->reloc_count;
2573 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2574 input_section->output_section);
2575 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2576 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2577 bfinfdpic_got_section (info)
2581 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2582 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2583 bfinfdpic_plt_section (info)
2588 for (rel = relocs; rel < relend; rel ++)
2590 reloc_howto_type *howto;
2591 unsigned long r_symndx;
2592 Elf_Internal_Sym *sym;
2594 struct elf_link_hash_entry *h;
2596 bfd_reloc_status_type r;
2597 const char * name = NULL;
2600 struct bfinfdpic_relocs_info *picrel;
2601 bfd_vma orig_addend = rel->r_addend;
2603 r_type = ELF32_R_TYPE (rel->r_info);
2605 if (r_type == R_BFIN_GNU_VTINHERIT
2606 || r_type == R_BFIN_GNU_VTENTRY)
2609 r_symndx = ELF32_R_SYM (rel->r_info);
2610 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2613 bfd_set_error (bfd_error_bad_value);
2621 if (r_symndx < symtab_hdr->sh_info)
2623 sym = local_syms + r_symndx;
2624 osec = sec = local_sections [r_symndx];
2625 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2627 name = bfd_elf_string_from_elf_section
2628 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2629 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2634 bfd_boolean unresolved_reloc;
2636 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2637 r_symndx, symtab_hdr, sym_hashes,
2639 unresolved_reloc, warned);
2643 if (sec != NULL && elf_discarded_section (sec))
2645 /* For relocs against symbols from removed linkonce sections,
2646 or sections discarded by a linker script, we just want the
2647 section contents zeroed. Avoid any special processing. */
2648 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2654 if (info->relocatable)
2658 && (h->root.type == bfd_link_hash_defined
2659 || h->root.type == bfd_link_hash_defweak)
2660 && !BFINFDPIC_SYM_LOCAL (info, h))
2669 case R_pcrel24_jump_l:
2671 if (! IS_FDPIC (output_bfd))
2674 case R_BFIN_GOT17M4:
2677 case R_BFIN_FUNCDESC_GOT17M4:
2678 case R_BFIN_FUNCDESC_GOTHI:
2679 case R_BFIN_FUNCDESC_GOTLO:
2680 case R_BFIN_GOTOFF17M4:
2681 case R_BFIN_GOTOFFHI:
2682 case R_BFIN_GOTOFFLO:
2683 case R_BFIN_FUNCDESC_GOTOFF17M4:
2684 case R_BFIN_FUNCDESC_GOTOFFHI:
2685 case R_BFIN_FUNCDESC_GOTOFFLO:
2686 case R_BFIN_FUNCDESC:
2687 case R_BFIN_FUNCDESC_VALUE:
2689 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2690 (info), input_bfd, h,
2691 orig_addend, INSERT);
2693 /* In order to find the entry we created before, we must
2694 use the original addend, not the one that may have been
2695 modified by _bfd_elf_rela_local_sym(). */
2696 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2697 (info), input_bfd, r_symndx,
2698 orig_addend, INSERT);
2702 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2706 (*_bfd_error_handler)
2707 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2708 input_bfd, input_section, rel->r_offset, name);
2718 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2720 info->callbacks->warning
2721 (info, _("relocation references symbol not defined in the module"),
2722 name, input_bfd, input_section, rel->r_offset);
2731 case R_pcrel24_jump_l:
2732 check_segment[0] = isec_segment;
2733 if (! IS_FDPIC (output_bfd))
2734 check_segment[1] = isec_segment;
2735 else if (picrel->plt)
2737 relocation = bfinfdpic_plt_section (info)->output_section->vma
2738 + bfinfdpic_plt_section (info)->output_offset
2739 + picrel->plt_entry;
2740 check_segment[1] = plt_segment;
2742 /* We don't want to warn on calls to undefined weak symbols,
2743 as calls to them must be protected by non-NULL tests
2744 anyway, and unprotected calls would invoke undefined
2746 else if (picrel->symndx == -1
2747 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2748 check_segment[1] = check_segment[0];
2750 check_segment[1] = sec
2751 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2755 case R_BFIN_GOT17M4:
2758 relocation = picrel->got_entry;
2759 check_segment[0] = check_segment[1] = got_segment;
2762 case R_BFIN_FUNCDESC_GOT17M4:
2763 case R_BFIN_FUNCDESC_GOTHI:
2764 case R_BFIN_FUNCDESC_GOTLO:
2765 relocation = picrel->fdgot_entry;
2766 check_segment[0] = check_segment[1] = got_segment;
2769 case R_BFIN_GOTOFFHI:
2770 case R_BFIN_GOTOFF17M4:
2771 case R_BFIN_GOTOFFLO:
2772 relocation -= bfinfdpic_got_section (info)->output_section->vma
2773 + bfinfdpic_got_section (info)->output_offset
2774 + bfinfdpic_got_initial_offset (info);
2775 check_segment[0] = got_segment;
2776 check_segment[1] = sec
2777 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2781 case R_BFIN_FUNCDESC_GOTOFF17M4:
2782 case R_BFIN_FUNCDESC_GOTOFFHI:
2783 case R_BFIN_FUNCDESC_GOTOFFLO:
2784 relocation = picrel->fd_entry;
2785 check_segment[0] = check_segment[1] = got_segment;
2788 case R_BFIN_FUNCDESC:
2791 bfd_vma addend = rel->r_addend;
2793 if (! (h && h->root.type == bfd_link_hash_undefweak
2794 && BFINFDPIC_SYM_LOCAL (info, h)))
2796 /* If the symbol is dynamic and there may be dynamic
2797 symbol resolution because we are or are linked with a
2798 shared library, emit a FUNCDESC relocation such that
2799 the dynamic linker will allocate the function
2800 descriptor. If the symbol needs a non-local function
2801 descriptor but binds locally (e.g., its visibility is
2802 protected, emit a dynamic relocation decayed to
2804 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2805 && BFINFDPIC_SYM_LOCAL (info, h)
2806 && !(info->executable && !info->pie))
2808 dynindx = elf_section_data (h->root.u.def.section
2809 ->output_section)->dynindx;
2810 addend += h->root.u.def.section->output_offset
2811 + h->root.u.def.value;
2813 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2817 info->callbacks->warning
2818 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2819 name, input_bfd, input_section, rel->r_offset);
2822 dynindx = h->dynindx;
2826 /* Otherwise, we know we have a private function
2827 descriptor, so reference it directly. */
2828 BFD_ASSERT (picrel->privfd);
2829 r_type = R_byte4_data;
2830 dynindx = elf_section_data (bfinfdpic_got_section (info)
2831 ->output_section)->dynindx;
2832 addend = bfinfdpic_got_section (info)->output_offset
2833 + bfinfdpic_got_initial_offset (info)
2837 /* If there is room for dynamic symbol resolution, emit
2838 the dynamic relocation. However, if we're linking an
2839 executable at a fixed location, we won't have emitted a
2840 dynamic symbol entry for the got section, so idx will
2841 be zero, which means we can and should compute the
2842 address of the private descriptor ourselves. */
2843 if (info->executable && !info->pie
2844 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2846 addend += bfinfdpic_got_section (info)->output_section->vma;
2847 if ((bfd_get_section_flags (output_bfd,
2848 input_section->output_section)
2849 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2851 if (_bfinfdpic_osec_readonly_p (output_bfd,
2855 info->callbacks->warning
2857 _("cannot emit fixups in read-only section"),
2858 name, input_bfd, input_section, rel->r_offset);
2861 _bfinfdpic_add_rofixup (output_bfd,
2862 bfinfdpic_gotfixup_section
2864 _bfd_elf_section_offset
2866 input_section, rel->r_offset)
2868 ->output_section->vma
2869 + input_section->output_offset,
2873 else if ((bfd_get_section_flags (output_bfd,
2874 input_section->output_section)
2875 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2879 if (_bfinfdpic_osec_readonly_p (output_bfd,
2883 info->callbacks->warning
2885 _("cannot emit dynamic relocations in read-only section"),
2886 name, input_bfd, input_section, rel->r_offset);
2889 offset = _bfd_elf_section_offset (output_bfd, info,
2890 input_section, rel->r_offset);
2891 /* Only output a reloc for a not deleted entry. */
2892 if (offset >= (bfd_vma) -2)
2893 _bfinfdpic_add_dyn_reloc (output_bfd,
2894 bfinfdpic_gotrel_section (info),
2897 dynindx, addend, picrel);
2899 _bfinfdpic_add_dyn_reloc (output_bfd,
2900 bfinfdpic_gotrel_section (info),
2901 offset + input_section
2902 ->output_section->vma
2903 + input_section->output_offset,
2905 dynindx, addend, picrel);
2908 addend += bfinfdpic_got_section (info)->output_section->vma;
2911 /* We want the addend in-place because dynamic
2912 relocations are REL. Setting relocation to it should
2913 arrange for it to be installed. */
2914 relocation = addend - rel->r_addend;
2916 check_segment[0] = check_segment[1] = got_segment;
2920 if (! IS_FDPIC (output_bfd))
2922 check_segment[0] = check_segment[1] = -1;
2926 case R_BFIN_FUNCDESC_VALUE:
2929 bfd_vma addend = rel->r_addend;
2931 offset = _bfd_elf_section_offset (output_bfd, info,
2932 input_section, rel->r_offset);
2934 /* If the symbol is dynamic but binds locally, use
2936 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2938 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2940 info->callbacks->warning
2941 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2942 name, input_bfd, input_section, rel->r_offset);
2945 dynindx = h->dynindx;
2950 addend += h->root.u.def.value;
2952 addend += sym->st_value;
2954 addend += osec->output_offset;
2955 if (osec && osec->output_section
2956 && ! bfd_is_abs_section (osec->output_section)
2957 && ! bfd_is_und_section (osec->output_section))
2958 dynindx = elf_section_data (osec->output_section)->dynindx;
2963 /* If we're linking an executable at a fixed address, we
2964 can omit the dynamic relocation as long as the symbol
2965 is defined in the current link unit (which is implied
2966 by its output section not being NULL). */
2967 if (info->executable && !info->pie
2968 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2971 addend += osec->output_section->vma;
2972 if (IS_FDPIC (input_bfd)
2973 && (bfd_get_section_flags (output_bfd,
2974 input_section->output_section)
2975 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2977 if (_bfinfdpic_osec_readonly_p (output_bfd,
2981 info->callbacks->warning
2983 _("cannot emit fixups in read-only section"),
2984 name, input_bfd, input_section, rel->r_offset);
2987 if (!h || h->root.type != bfd_link_hash_undefweak)
2989 /* Only output a reloc for a not deleted entry. */
2990 if (offset >= (bfd_vma)-2)
2991 _bfinfdpic_add_rofixup (output_bfd,
2992 bfinfdpic_gotfixup_section
2993 (info), -1, picrel);
2995 _bfinfdpic_add_rofixup (output_bfd,
2996 bfinfdpic_gotfixup_section
2998 offset + input_section
2999 ->output_section->vma
3000 + input_section->output_offset,
3003 if (r_type == R_BFIN_FUNCDESC_VALUE)
3005 if (offset >= (bfd_vma)-2)
3006 _bfinfdpic_add_rofixup
3008 bfinfdpic_gotfixup_section (info),
3011 _bfinfdpic_add_rofixup
3013 bfinfdpic_gotfixup_section (info),
3014 offset + input_section->output_section->vma
3015 + input_section->output_offset + 4, picrel);
3022 if ((bfd_get_section_flags (output_bfd,
3023 input_section->output_section)
3024 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3026 if (_bfinfdpic_osec_readonly_p (output_bfd,
3030 info->callbacks->warning
3032 _("cannot emit dynamic relocations in read-only section"),
3033 name, input_bfd, input_section, rel->r_offset);
3036 /* Only output a reloc for a not deleted entry. */
3037 if (offset >= (bfd_vma)-2)
3038 _bfinfdpic_add_dyn_reloc (output_bfd,
3039 bfinfdpic_gotrel_section (info),
3040 0, R_unused0, dynindx, addend, picrel);
3042 _bfinfdpic_add_dyn_reloc (output_bfd,
3043 bfinfdpic_gotrel_section (info),
3046 ->output_section->vma
3047 + input_section->output_offset,
3048 r_type, dynindx, addend, picrel);
3051 addend += osec->output_section->vma;
3052 /* We want the addend in-place because dynamic
3053 relocations are REL. Setting relocation to it
3054 should arrange for it to be installed. */
3055 relocation = addend - rel->r_addend;
3058 if (r_type == R_BFIN_FUNCDESC_VALUE && offset < (bfd_vma)-2)
3060 /* If we've omitted the dynamic relocation, just emit
3061 the fixed addresses of the symbol and of the local
3063 if (info->executable && !info->pie
3064 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3065 bfd_put_32 (output_bfd,
3066 bfinfdpic_got_section (info)->output_section->vma
3067 + bfinfdpic_got_section (info)->output_offset
3068 + bfinfdpic_got_initial_offset (info),
3069 contents + rel->r_offset + 4);
3071 /* A function descriptor used for lazy or local
3072 resolving is initialized such that its high word
3073 contains the output section index in which the
3074 PLT entries are located, and the low word
3075 contains the offset of the lazy PLT entry entry
3076 point into that section. */
3077 bfd_put_32 (output_bfd,
3078 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3080 : _bfinfdpic_osec_to_segment (output_bfd,
3083 contents + rel->r_offset + 4);
3086 check_segment[0] = check_segment[1] = got_segment;
3090 check_segment[0] = isec_segment;
3091 check_segment[1] = sec
3092 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3097 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3099 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3100 in the ld testsuite. */
3101 /* This helps catch problems in GCC while we can't do more
3102 than static linking. The idea is to test whether the
3103 input file basename is crt0.o only once. */
3104 if (silence_segment_error == 1)
3105 silence_segment_error =
3106 (strlen (input_bfd->filename) == 6
3107 && strcmp (input_bfd->filename, "crt0.o") == 0)
3108 || (strlen (input_bfd->filename) > 6
3109 && strcmp (input_bfd->filename
3110 + strlen (input_bfd->filename) - 7,
3114 if (!silence_segment_error
3115 /* We don't want duplicate errors for undefined
3117 && !(picrel && picrel->symndx == -1
3118 && picrel->d.h->root.type == bfd_link_hash_undefined))
3119 info->callbacks->warning
3121 (info->shared || info->pie)
3122 ? _("relocations between different segments are not supported")
3123 : _("warning: relocation references a different segment"),
3124 name, input_bfd, input_section, rel->r_offset);
3125 if (!silence_segment_error && (info->shared || info->pie))
3127 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3132 case R_BFIN_GOTOFFHI:
3133 /* We need the addend to be applied before we shift the
3135 relocation += rel->r_addend;
3138 case R_BFIN_FUNCDESC_GOTHI:
3139 case R_BFIN_FUNCDESC_GOTOFFHI:
3144 case R_BFIN_FUNCDESC_GOTLO:
3145 case R_BFIN_GOTOFFLO:
3146 case R_BFIN_FUNCDESC_GOTOFFLO:
3147 relocation &= 0xffff;
3157 case R_pcrel24_jump_l:
3158 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3162 /* When referencing a GOT entry, a function descriptor or a
3163 PLT, we don't want the addend to apply to the reference,
3164 but rather to the referenced symbol. The actual entry
3165 will have already been created taking the addend into
3166 account, so cancel it out here. */
3167 case R_BFIN_GOT17M4:
3170 case R_BFIN_FUNCDESC_GOT17M4:
3171 case R_BFIN_FUNCDESC_GOTHI:
3172 case R_BFIN_FUNCDESC_GOTLO:
3173 case R_BFIN_FUNCDESC_GOTOFF17M4:
3174 case R_BFIN_FUNCDESC_GOTOFFHI:
3175 case R_BFIN_FUNCDESC_GOTOFFLO:
3176 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3177 here, since we do want to apply the addend to the others.
3178 Note that we've applied the addend to GOTOFFHI before we
3179 shifted it right. */
3180 case R_BFIN_GOTOFFHI:
3181 relocation -= rel->r_addend;
3188 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3189 contents, rel->r_offset,
3190 relocation, rel->r_addend);
3192 if (r != bfd_reloc_ok)
3194 const char * msg = (const char *) NULL;
3198 case bfd_reloc_overflow:
3199 r = info->callbacks->reloc_overflow
3200 (info, (h ? &h->root : NULL), name, howto->name,
3201 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3204 case bfd_reloc_undefined:
3205 r = info->callbacks->undefined_symbol
3206 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3209 case bfd_reloc_outofrange:
3210 msg = _("internal error: out of range error");
3213 case bfd_reloc_notsupported:
3214 msg = _("internal error: unsupported relocation error");
3217 case bfd_reloc_dangerous:
3218 msg = _("internal error: dangerous relocation");
3222 msg = _("internal error: unknown error");
3227 r = info->callbacks->warning
3228 (info, msg, name, input_bfd, input_section, rel->r_offset);
3238 /* Update the relocation information for the relocations of the section
3242 bfinfdpic_gc_sweep_hook (bfd *abfd,
3243 struct bfd_link_info *info,
3245 const Elf_Internal_Rela *relocs)
3247 Elf_Internal_Shdr *symtab_hdr;
3248 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3249 const Elf_Internal_Rela *rel;
3250 const Elf_Internal_Rela *rel_end;
3251 struct bfinfdpic_relocs_info *picrel;
3253 BFD_ASSERT (IS_FDPIC (abfd));
3255 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3256 sym_hashes = elf_sym_hashes (abfd);
3257 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3258 if (!elf_bad_symtab (abfd))
3259 sym_hashes_end -= symtab_hdr->sh_info;
3261 rel_end = relocs + sec->reloc_count;
3262 for (rel = relocs; rel < rel_end; rel++)
3264 struct elf_link_hash_entry *h;
3265 unsigned long r_symndx;
3267 r_symndx = ELF32_R_SYM (rel->r_info);
3268 if (r_symndx < symtab_hdr->sh_info)
3271 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3274 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3276 rel->r_addend, NO_INSERT);
3278 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3279 (info), abfd, r_symndx,
3280 rel->r_addend, NO_INSERT);
3285 switch (ELF32_R_TYPE (rel->r_info))
3288 case R_pcrel24_jump_l:
3292 case R_BFIN_FUNCDESC_VALUE:
3293 picrel->relocsfdv--;
3294 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3300 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3304 case R_BFIN_GOT17M4:
3313 case R_BFIN_FUNCDESC_GOT17M4:
3314 picrel->fdgot17m4--;
3317 case R_BFIN_FUNCDESC_GOTHI:
3318 case R_BFIN_FUNCDESC_GOTLO:
3319 picrel->fdgothilo--;
3322 case R_BFIN_GOTOFF17M4:
3323 case R_BFIN_GOTOFFHI:
3324 case R_BFIN_GOTOFFLO:
3328 case R_BFIN_FUNCDESC_GOTOFF17M4:
3329 picrel->fdgoff17m4--;
3332 case R_BFIN_FUNCDESC_GOTOFFHI:
3333 case R_BFIN_FUNCDESC_GOTOFFLO:
3334 picrel->fdgoffhilo--;
3337 case R_BFIN_FUNCDESC:
3350 /* We need dynamic symbols for every section, since segments can
3351 relocate independently. */
3353 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3354 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3357 switch (elf_section_data (p)->this_hdr.sh_type)
3361 /* If sh_type is yet undecided, assume it could be
3362 SHT_PROGBITS/SHT_NOBITS. */
3366 /* There shouldn't be section relative relocations
3367 against any other section. */
3373 /* Create a .got section, as well as its additional info field. This
3374 is almost entirely copied from
3375 elflink.c:_bfd_elf_create_got_section(). */
3378 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3380 flagword flags, pltflags;
3382 struct elf_link_hash_entry *h;
3383 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3387 /* This function may be called more than once. */
3388 s = bfd_get_section_by_name (abfd, ".got");
3389 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3392 /* Machine specific: although pointers are 32-bits wide, we want the
3393 GOT to be aligned to a 64-bit boundary, such that function
3394 descriptors in it can be accessed with 64-bit loads and
3398 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3399 | SEC_LINKER_CREATED);
3402 s = bfd_make_section_with_flags (abfd, ".got", flags);
3404 || !bfd_set_section_alignment (abfd, s, ptralign))
3407 if (bed->want_got_plt)
3409 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3411 || !bfd_set_section_alignment (abfd, s, ptralign))
3415 if (bed->want_got_sym)
3417 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3418 (or .got.plt) section. We don't do this in the linker script
3419 because we don't want to define the symbol if we are not creating
3420 a global offset table. */
3421 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3422 elf_hash_table (info)->hgot = h;
3426 /* Machine-specific: we want the symbol for executables as
3428 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3432 /* The first bit of the global offset table is the header. */
3433 s->size += bed->got_header_size;
3435 /* This is the machine-specific part. Create and initialize section
3436 data for the got. */
3437 if (IS_FDPIC (abfd))
3439 bfinfdpic_got_section (info) = s;
3440 bfinfdpic_relocs_info (info) = htab_try_create (1,
3441 bfinfdpic_relocs_info_hash,
3442 bfinfdpic_relocs_info_eq,
3444 if (! bfinfdpic_relocs_info (info))
3447 s = bfd_make_section_with_flags (abfd, ".rel.got",
3448 (flags | SEC_READONLY));
3450 || ! bfd_set_section_alignment (abfd, s, 2))
3453 bfinfdpic_gotrel_section (info) = s;
3455 /* Machine-specific. */
3456 s = bfd_make_section_with_flags (abfd, ".rofixup",
3457 (flags | SEC_READONLY));
3459 || ! bfd_set_section_alignment (abfd, s, 2))
3462 bfinfdpic_gotfixup_section (info) = s;
3469 flags = BSF_GLOBAL | BSF_WEAK;
3475 /* Make sure the got and plt sections exist, and that our pointers in
3476 the link hash table point to them. */
3479 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3481 /* This is mostly copied from
3482 elflink.c:_bfd_elf_create_dynamic_sections(). */
3483 flagword flags, pltflags;
3485 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3487 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3488 .rel[a].bss sections. */
3490 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3491 | SEC_LINKER_CREATED);
3494 pltflags |= SEC_CODE;
3495 if (bed->plt_not_loaded)
3496 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3497 if (bed->plt_readonly)
3498 pltflags |= SEC_READONLY;
3500 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
3502 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3504 /* Blackfin-specific: remember it. */
3505 bfinfdpic_plt_section (info) = s;
3507 if (bed->want_plt_sym)
3509 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3511 struct elf_link_hash_entry *h;
3512 struct bfd_link_hash_entry *bh = NULL;
3514 if (! (_bfd_generic_link_add_one_symbol
3515 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3516 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3518 h = (struct elf_link_hash_entry *) bh;
3520 h->type = STT_OBJECT;
3522 if (! info->executable
3523 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3527 /* Blackfin-specific: we want rel relocations for the plt. */
3528 s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY);
3530 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3532 /* Blackfin-specific: remember it. */
3533 bfinfdpic_pltrel_section (info) = s;
3535 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3536 if (! _bfin_create_got_section (abfd, info))
3539 /* Blackfin-specific: make sure we created everything we wanted. */
3540 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3541 /* && bfinfdpic_gotfixup_section (info) */
3542 && bfinfdpic_plt_section (info)
3543 && bfinfdpic_pltrel_section (info));
3545 if (bed->want_dynbss)
3547 /* The .dynbss section is a place to put symbols which are defined
3548 by dynamic objects, are referenced by regular objects, and are
3549 not functions. We must allocate space for them in the process
3550 image and use a R_*_COPY reloc to tell the dynamic linker to
3551 initialize them at run time. The linker script puts the .dynbss
3552 section into the .bss section of the final image. */
3553 s = bfd_make_section_with_flags (abfd, ".dynbss",
3554 SEC_ALLOC | SEC_LINKER_CREATED);
3558 /* The .rel[a].bss section holds copy relocs. This section is not
3559 normally needed. We need to create it here, though, so that the
3560 linker will map it to an output section. We can't just create it
3561 only if we need it, because we will not know whether we need it
3562 until we have seen all the input files, and the first time the
3563 main linker code calls BFD after examining all the input files
3564 (size_dynamic_sections) the input sections have already been
3565 mapped to the output sections. If the section turns out not to
3566 be needed, we can discard it later. We will never need this
3567 section when generating a shared object, since they do not use
3571 s = bfd_make_section_with_flags (abfd,
3572 (bed->default_use_rela_p
3573 ? ".rela.bss" : ".rel.bss"),
3574 flags | SEC_READONLY);
3576 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3584 /* Compute the total GOT size required by each symbol in each range.
3585 Symbols may require up to 4 words in the GOT: an entry pointing to
3586 the symbol, an entry pointing to its function descriptor, and a
3587 private function descriptors taking two words. */
3590 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3592 struct bfinfdpic_relocs_info *entry = *entryp;
3593 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3594 unsigned relocs = 0, fixups = 0;
3596 /* Allocate space for a GOT entry pointing to the symbol. */
3598 dinfo->got17m4 += 4;
3599 else if (entry->gothilo)
3600 dinfo->gothilo += 4;
3605 /* Allocate space for a GOT entry pointing to the function
3607 if (entry->fdgot17m4)
3608 dinfo->got17m4 += 4;
3609 else if (entry->fdgothilo)
3610 dinfo->gothilo += 4;
3615 /* Decide whether we need a PLT entry, a function descriptor in the
3616 GOT, and a lazy PLT entry for this symbol. */
3617 entry->plt = entry->call
3618 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3619 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3620 entry->privfd = entry->plt
3621 || entry->fdgoff17m4 || entry->fdgoffhilo
3622 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3623 && (entry->symndx != -1
3624 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3625 entry->lazyplt = entry->privfd
3626 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3627 && ! (dinfo->info->flags & DF_BIND_NOW)
3628 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3630 /* Allocate space for a function descriptor. */
3631 if (entry->fdgoff17m4)
3633 else if (entry->privfd && entry->plt)
3635 else if (entry->privfd)
3642 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3644 if (!dinfo->info->executable || dinfo->info->pie)
3645 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3648 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3650 if (entry->symndx != -1
3651 || entry->d.h->root.type != bfd_link_hash_undefweak)
3652 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3655 relocs += entry->relocs32 + entry->relocsfdv;
3657 if (entry->symndx != -1
3658 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3660 if (entry->symndx != -1
3661 || entry->d.h->root.type != bfd_link_hash_undefweak)
3662 fixups += entry->relocsfd;
3665 relocs += entry->relocsfd;
3668 entry->dynrelocs += relocs;
3669 entry->fixups += fixups;
3670 dinfo->relocs += relocs;
3671 dinfo->fixups += fixups;
3676 /* This structure is used to assign offsets to got entries, function
3677 descriptors, plt entries and lazy plt entries. */
3679 struct _bfinfdpic_dynamic_got_plt_info
3681 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3682 struct _bfinfdpic_dynamic_got_info g;
3684 /* For each addressable range, we record a MAX (positive) and MIN
3685 (negative) value. CUR is used to assign got entries, and it's
3686 incremented from an initial positive value to MAX, then from MIN
3687 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3688 assign function descriptors, and it's decreased from an initial
3689 non-positive value to MIN, then from MAX down to CUR (unless CUR
3690 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3691 to even words. ODD, if non-zero, indicates an odd word to be
3692 used for the next got entry, otherwise CUR is used and
3693 incremented by a pair of words, wrapping around when it reaches
3694 MAX. FDCUR is decremented (and wrapped) before the next function
3695 descriptor is chosen. FDPLT indicates the number of remaining
3696 slots that can be used for function descriptors used only by PLT
3698 struct _bfinfdpic_dynamic_got_alloc_data
3700 bfd_signed_vma max, cur, odd, fdcur, min;
3705 /* Determine the positive and negative ranges to be used by each
3706 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3707 double-word boundary, are the minimum (negative) and maximum
3708 (positive) GOT offsets already used by previous ranges, except for
3709 an ODD entry that may have been left behind. GOT and FD indicate
3710 the size of GOT entries and function descriptors that must be
3711 placed within the range from -WRAP to WRAP. If there's room left,
3712 up to FDPLT bytes should be reserved for additional function
3715 inline static bfd_signed_vma
3716 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3717 bfd_signed_vma fdcur,
3725 bfd_signed_vma wrapmin = -wrap;
3727 /* Start at the given initial points. */
3731 /* If we had an incoming odd word and we have any got entries that
3732 are going to use it, consume it, otherwise leave gad->odd at
3733 zero. We might force gad->odd to zero and return the incoming
3734 odd such that it is used by the next range, but then GOT entries
3735 might appear to be out of order and we wouldn't be able to
3736 shorten the GOT by one word if it turns out to end with an
3737 unpaired GOT entry. */
3747 /* If we're left with an unpaired GOT entry, compute its location
3748 such that we can return it. Otherwise, if got doesn't require an
3749 odd number of words here, either odd was already zero in the
3750 block above, or it was set to zero because got was non-zero, or
3751 got was already zero. In the latter case, we want the value of
3752 odd to carry over to the return statement, so we don't want to
3753 reset odd unless the condition below is true. */
3760 /* Compute the tentative boundaries of this range. */
3761 gad->max = cur + got;
3762 gad->min = fdcur - fd;
3765 /* If function descriptors took too much space, wrap some of them
3767 if (gad->min < wrapmin)
3769 gad->max += wrapmin - gad->min;
3772 /* If there is space left and we have function descriptors
3773 referenced in PLT entries that could take advantage of shorter
3774 offsets, place them here. */
3775 else if (fdplt && gad->min > wrapmin)
3778 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3779 fds = gad->min - wrapmin;
3788 /* If GOT entries took too much space, wrap some of them around.
3789 This may well cause gad->min to become lower than wrapmin. This
3790 will cause a relocation overflow later on, so we don't have to
3792 if ((bfd_vma) gad->max > wrap)
3794 gad->min -= gad->max - wrap;
3797 /* If there is more space left, try to place some more function
3798 descriptors for PLT entries. */
3799 else if (fdplt && (bfd_vma) gad->max < wrap)
3802 if ((bfd_vma) (wrap - gad->max) < fdplt)
3803 fds = wrap - gad->max;
3812 /* If odd was initially computed as an offset past the wrap point,
3815 odd = gad->min + odd - gad->max;
3817 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3818 before returning, so do it here too. This guarantees that,
3819 should cur and fdcur meet at the wrap point, they'll both be
3821 if (gad->cur == gad->max)
3822 gad->cur = gad->min;
3827 /* Compute the location of the next GOT entry, given the allocation
3828 data for a range. */
3830 inline static bfd_signed_vma
3831 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3837 /* If there was an odd word left behind, use it. */
3843 /* Otherwise, use the word pointed to by cur, reserve the next
3844 as an odd word, and skip to the next pair of words, possibly
3847 gad->odd = gad->cur + 4;
3849 if (gad->cur == gad->max)
3850 gad->cur = gad->min;
3856 /* Compute the location of the next function descriptor entry in the
3857 GOT, given the allocation data for a range. */
3859 inline static bfd_signed_vma
3860 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3862 /* If we're at the bottom, wrap around, and only then allocate the
3863 next pair of words. */
3864 if (gad->fdcur == gad->min)
3865 gad->fdcur = gad->max;
3866 return gad->fdcur -= 8;
3869 /* Assign GOT offsets for every GOT entry and function descriptor.
3870 Doing everything in a single pass is tricky. */
3873 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3875 struct bfinfdpic_relocs_info *entry = *entryp;
3876 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3879 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3880 else if (entry->gothilo)
3881 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3883 if (entry->fdgot17m4)
3884 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3885 else if (entry->fdgothilo)
3886 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3888 if (entry->fdgoff17m4)
3889 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3890 else if (entry->plt && dinfo->got17m4.fdplt)
3892 dinfo->got17m4.fdplt -= 8;
3893 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3895 else if (entry->plt)
3897 dinfo->gothilo.fdplt -= 8;
3898 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3900 else if (entry->privfd)
3901 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3906 /* Assign GOT offsets to private function descriptors used by PLT
3907 entries (or referenced by 32-bit offsets), as well as PLT entries
3908 and lazy PLT entries. */
3911 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3913 struct bfinfdpic_relocs_info *entry = *entryp;
3914 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3916 /* If this symbol requires a local function descriptor, allocate
3918 if (entry->privfd && entry->fd_entry == 0)
3920 if (dinfo->got17m4.fdplt)
3922 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3923 dinfo->got17m4.fdplt -= 8;
3927 BFD_ASSERT (dinfo->gothilo.fdplt);
3928 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3929 dinfo->gothilo.fdplt -= 8;
3937 /* We use the section's raw size to mark the location of the
3939 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3941 /* Figure out the length of this PLT entry based on the
3942 addressing mode we need to reach the function descriptor. */
3943 BFD_ASSERT (entry->fd_entry);
3944 if (entry->fd_entry >= -(1 << (18 - 1))
3945 && entry->fd_entry + 4 < (1 << (18 - 1)))
3950 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3955 entry->lzplt_entry = dinfo->g.lzplt;
3956 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3957 /* If this entry is the one that gets the resolver stub, account
3958 for the additional instruction. */
3959 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3960 == BFINFDPIC_LZPLT_RESOLV_LOC)
3961 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3967 /* Follow indirect and warning hash entries so that each got entry
3968 points to the final symbol definition. P must point to a pointer
3969 to the hash table we're traversing. Since this traversal may
3970 modify the hash table, we set this pointer to NULL to indicate
3971 we've made a potentially-destructive change to the hash table, so
3972 the traversal must be restarted. */
3974 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
3976 struct bfinfdpic_relocs_info *entry = *entryp;
3979 if (entry->symndx == -1)
3981 struct elf_link_hash_entry *h = entry->d.h;
3982 struct bfinfdpic_relocs_info *oentry;
3984 while (h->root.type == bfd_link_hash_indirect
3985 || h->root.type == bfd_link_hash_warning)
3986 h = (struct elf_link_hash_entry *)h->root.u.i.link;
3988 if (entry->d.h == h)
3991 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
3996 /* Merge the two entries. */
3997 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
3998 htab_clear_slot (*htab, entryp);
4004 /* If we can't find this entry with the new bfd hash, re-insert
4005 it, and get the traversal restarted. */
4006 if (! htab_find (*htab, entry))
4008 htab_clear_slot (*htab, entryp);
4009 entryp = htab_find_slot (*htab, entry, INSERT);
4012 /* Abort the traversal, since the whole table may have
4013 moved, and leave it up to the parent to restart the
4015 *(htab_t *)p = NULL;
4023 /* Set the sizes of the dynamic sections. */
4026 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4027 struct bfd_link_info *info)
4031 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4035 dynobj = elf_hash_table (info)->dynobj;
4036 BFD_ASSERT (dynobj != NULL);
4038 if (elf_hash_table (info)->dynamic_sections_created)
4040 /* Set the contents of the .interp section to the interpreter. */
4041 if (info->executable)
4043 s = bfd_get_section_by_name (dynobj, ".interp");
4044 BFD_ASSERT (s != NULL);
4045 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4046 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4050 memset (&gpinfo, 0, sizeof (gpinfo));
4051 gpinfo.g.info = info;
4055 htab_t relocs = bfinfdpic_relocs_info (info);
4057 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4059 if (relocs == bfinfdpic_relocs_info (info))
4063 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4067 /* Compute the total size taken by entries in the 18-bit range,
4068 to tell how many PLT function descriptors we can bring into it
4069 without causing it to overflow. */
4070 limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4;
4071 if (limit < (bfd_vma)1 << 18)
4072 limit = ((bfd_vma)1 << 18) - limit;
4075 if (gpinfo.g.fdplt < limit)
4076 limit = gpinfo.g.fdplt;
4078 /* Determine the ranges of GOT offsets that we can use for each
4079 range of addressing modes. */
4080 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4,
4087 (bfd_vma)1 << (18-1));
4088 odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo,
4094 gpinfo.g.fdplt - gpinfo.got17m4.fdplt,
4095 (bfd_vma)1 << (32-1));
4097 /* Now assign (most) GOT offsets. */
4098 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4101 bfinfdpic_got_section (info)->size = gpinfo.gothilo.max
4102 - gpinfo.gothilo.min
4103 /* If an odd word is the last word of the GOT, we don't need this
4104 word to be part of the GOT. */
4105 - (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
4106 if (bfinfdpic_got_section (info)->size == 0)
4107 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4108 else if (bfinfdpic_got_section (info)->size == 12
4109 && ! elf_hash_table (info)->dynamic_sections_created)
4111 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4112 bfinfdpic_got_section (info)->size = 0;
4116 bfinfdpic_got_section (info)->contents =
4117 (bfd_byte *) bfd_zalloc (dynobj,
4118 bfinfdpic_got_section (info)->size);
4119 if (bfinfdpic_got_section (info)->contents == NULL)
4123 if (elf_hash_table (info)->dynamic_sections_created)
4124 /* Subtract the number of lzplt entries, since those will generate
4125 relocations in the pltrel section. */
4126 bfinfdpic_gotrel_section (info)->size =
4127 (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE)
4128 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4130 BFD_ASSERT (gpinfo.g.relocs == 0);
4131 if (bfinfdpic_gotrel_section (info)->size == 0)
4132 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4135 bfinfdpic_gotrel_section (info)->contents =
4136 (bfd_byte *) bfd_zalloc (dynobj,
4137 bfinfdpic_gotrel_section (info)->size);
4138 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4142 bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4;
4143 if (bfinfdpic_gotfixup_section (info)->size == 0)
4144 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4147 bfinfdpic_gotfixup_section (info)->contents =
4148 (bfd_byte *) bfd_zalloc (dynobj,
4149 bfinfdpic_gotfixup_section (info)->size);
4150 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4154 if (elf_hash_table (info)->dynamic_sections_created)
4156 bfinfdpic_pltrel_section (info)->size =
4157 gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4158 if (bfinfdpic_pltrel_section (info)->size == 0)
4159 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4162 bfinfdpic_pltrel_section (info)->contents =
4163 (bfd_byte *) bfd_zalloc (dynobj,
4164 bfinfdpic_pltrel_section (info)->size);
4165 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4170 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4171 such that there's room for the additional instruction needed to
4172 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4173 account for them, our block size is 4 bytes smaller than the real
4175 if (elf_hash_table (info)->dynamic_sections_created)
4177 bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt
4178 + ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4179 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4182 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4183 actually assign lazy PLT entries addresses. */
4186 /* Save information that we're going to need to generate GOT and PLT
4188 bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min;
4190 if (get_elf_backend_data (output_bfd)->want_got_sym)
4191 elf_hash_table (info)->hgot->root.u.def.value
4192 += bfinfdpic_got_initial_offset (info);
4194 if (elf_hash_table (info)->dynamic_sections_created)
4195 bfinfdpic_plt_initial_offset (info) =
4196 bfinfdpic_plt_section (info)->size;
4198 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4201 /* Allocate the PLT section contents only after
4202 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4203 non-lazy PLT entries. */
4204 if (elf_hash_table (info)->dynamic_sections_created)
4206 if (bfinfdpic_plt_section (info)->size == 0)
4207 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4210 bfinfdpic_plt_section (info)->contents =
4211 (bfd_byte *) bfd_zalloc (dynobj,
4212 bfinfdpic_plt_section (info)->size);
4213 if (bfinfdpic_plt_section (info)->contents == NULL)
4218 if (elf_hash_table (info)->dynamic_sections_created)
4220 if (bfinfdpic_got_section (info)->size)
4221 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4224 if (bfinfdpic_pltrel_section (info)->size)
4225 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4226 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4227 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4230 if (bfinfdpic_gotrel_section (info)->size)
4231 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4232 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4233 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4234 sizeof (Elf32_External_Rel)))
4242 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4243 struct bfd_link_info *info)
4245 if (!info->relocatable)
4247 struct elf_link_hash_entry *h;
4249 /* Force a PT_GNU_STACK segment to be created. */
4250 if (! elf_tdata (output_bfd)->stack_flags)
4251 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4253 /* Define __stacksize if it's not defined yet. */
4254 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4255 FALSE, FALSE, FALSE);
4256 if (! h || h->root.type != bfd_link_hash_defined
4257 || h->type != STT_OBJECT
4260 struct bfd_link_hash_entry *bh = NULL;
4262 if (!(_bfd_generic_link_add_one_symbol
4263 (info, output_bfd, "__stacksize",
4264 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4265 (const char *) NULL, FALSE,
4266 get_elf_backend_data (output_bfd)->collect, &bh)))
4269 h = (struct elf_link_hash_entry *) bh;
4271 h->type = STT_OBJECT;
4279 elf32_bfinfdpic_modify_program_headers (bfd *output_bfd,
4280 struct bfd_link_info *info)
4282 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
4283 struct elf_segment_map *m;
4284 Elf_Internal_Phdr *p;
4286 /* objcopy and strip preserve what's already there using
4287 elf32_bfinfdpic_copy_private_bfd_data (). */
4291 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
4292 if (m->p_type == PT_GNU_STACK)
4297 struct elf_link_hash_entry *h;
4299 /* Obtain the pointer to the __stacksize symbol. */
4300 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4301 FALSE, FALSE, FALSE);
4304 while (h->root.type == bfd_link_hash_indirect
4305 || h->root.type == bfd_link_hash_warning)
4306 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4307 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4310 /* Set the header p_memsz from the symbol value. We
4311 intentionally ignore the symbol section. */
4312 if (h && h->root.type == bfd_link_hash_defined)
4313 p->p_memsz = h->root.u.def.value;
4315 p->p_memsz = DEFAULT_STACK_SIZE;
4324 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4325 struct bfd_link_info *info)
4330 dynobj = elf_hash_table (info)->dynobj;
4332 if (bfinfdpic_got_section (info))
4334 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4335 == (bfinfdpic_gotrel_section (info)->reloc_count
4336 * sizeof (Elf32_External_Rel)));
4338 if (bfinfdpic_gotfixup_section (info))
4340 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4341 bfd_vma got_value = hgot->root.u.def.value
4342 + hgot->root.u.def.section->output_section->vma
4343 + hgot->root.u.def.section->output_offset;
4345 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4348 if (bfinfdpic_gotfixup_section (info)->size
4349 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4351 (*_bfd_error_handler)
4352 ("LINKER BUG: .rofixup section size mismatch");
4357 if (elf_hash_table (info)->dynamic_sections_created)
4359 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4360 == (bfinfdpic_pltrel_section (info)->reloc_count
4361 * sizeof (Elf32_External_Rel)));
4364 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4366 if (elf_hash_table (info)->dynamic_sections_created)
4368 Elf32_External_Dyn * dyncon;
4369 Elf32_External_Dyn * dynconend;
4371 BFD_ASSERT (sdyn != NULL);
4373 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4374 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4376 for (; dyncon < dynconend; dyncon++)
4378 Elf_Internal_Dyn dyn;
4380 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4388 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4389 + bfinfdpic_got_section (info)->output_offset
4390 + bfinfdpic_got_initial_offset (info);
4391 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4395 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4396 ->output_section->vma
4397 + bfinfdpic_pltrel_section (info)->output_offset;
4398 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4402 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4403 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4412 /* Adjust a symbol defined by a dynamic object and referenced by a
4416 elf32_bfinfdpic_adjust_dynamic_symbol
4417 (struct bfd_link_info *info,
4418 struct elf_link_hash_entry *h)
4422 dynobj = elf_hash_table (info)->dynobj;
4424 /* Make sure we know what is going on here. */
4425 BFD_ASSERT (dynobj != NULL
4426 && (h->u.weakdef != NULL
4429 && !h->def_regular)));
4431 /* If this is a weak symbol, and there is a real definition, the
4432 processor independent code will have arranged for us to see the
4433 real definition first, and we can just use the same value. */
4434 if (h->u.weakdef != NULL)
4436 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4437 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4438 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4439 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4445 /* Perform any actions needed for dynamic symbols. */
4448 elf32_bfinfdpic_finish_dynamic_symbol
4449 (bfd *output_bfd ATTRIBUTE_UNUSED,
4450 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4451 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4452 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4457 /* Decide whether to attempt to turn absptr or lsda encodings in
4458 shared libraries into pcrel within the given input section. */
4461 bfinfdpic_elf_use_relative_eh_frame
4462 (bfd *input_bfd ATTRIBUTE_UNUSED,
4463 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4464 asection *eh_frame_section ATTRIBUTE_UNUSED)
4466 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4470 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4473 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4474 struct bfd_link_info *info,
4475 asection *osec, bfd_vma offset,
4476 asection *loc_sec, bfd_vma loc_offset,
4479 struct elf_link_hash_entry *h;
4481 h = elf_hash_table (info)->hgot;
4482 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4484 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4485 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4486 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4487 loc_sec, loc_offset, encoded);
4489 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4490 == (_bfinfdpic_osec_to_segment
4491 (abfd, h->root.u.def.section->output_section)));
4493 *encoded = osec->vma + offset
4494 - (h->root.u.def.value
4495 + h->root.u.def.section->output_section->vma
4496 + h->root.u.def.section->output_offset);
4498 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4503 /* Look through the relocs for a section during the first phase.
4505 Besides handling virtual table relocs for gc, we have to deal with
4506 all sorts of PIC-related relocations. We describe below the
4507 general plan on how to handle such relocations, even though we only
4508 collect information at this point, storing them in hash tables for
4509 perusal of later passes.
4511 32 relocations are propagated to the linker output when creating
4512 position-independent output. LO16 and HI16 relocations are not
4513 supposed to be encountered in this case.
4515 LABEL16 should always be resolvable by the linker, since it's only
4518 LABEL24, on the other hand, is used by calls. If it turns out that
4519 the target of a call is a dynamic symbol, a PLT entry must be
4520 created for it, which triggers the creation of a private function
4521 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4523 GPREL relocations require the referenced symbol to be in the same
4524 segment as _gp, but this can only be checked later.
4526 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4527 exist. LABEL24 might as well, since it may require a PLT entry,
4528 that will require a got.
4530 Non-FUNCDESC GOT relocations require a GOT entry to be created
4531 regardless of whether the symbol is dynamic. However, since a
4532 global symbol that turns out to not be exported may have the same
4533 address of a non-dynamic symbol, we don't assign GOT entries at
4534 this point, such that we can share them in this case. A relocation
4535 for the GOT entry always has to be created, be it to offset a
4536 private symbol by the section load address, be it to get the symbol
4537 resolved dynamically.
4539 FUNCDESC GOT relocations require a GOT entry to be created, and
4540 handled as if a FUNCDESC relocation was applied to the GOT entry in
4543 FUNCDESC relocations referencing a symbol that turns out to NOT be
4544 dynamic cause a private function descriptor to be created. The
4545 FUNCDESC relocation then decays to a 32 relocation that points at
4546 the private descriptor. If the symbol is dynamic, the FUNCDESC
4547 relocation is propagated to the linker output, such that the
4548 dynamic linker creates the canonical descriptor, pointing to the
4549 dynamically-resolved definition of the function.
4551 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4552 symbols that are assigned to the same segment as the GOT, but we
4553 can only check this later, after we know the complete set of
4554 symbols defined and/or exported.
4556 FUNCDESC GOTOFF relocations require a function descriptor to be
4557 created and, unless lazy binding is disabled or the symbol is not
4558 dynamic, a lazy PLT entry. Since we can't tell at this point
4559 whether a symbol is going to be dynamic, we have to decide later
4560 whether to create a lazy PLT entry or bind the descriptor directly
4561 to the private function.
4563 FUNCDESC_VALUE relocations are not supposed to be present in object
4564 files, but they may very well be simply propagated to the linker
4565 output, since they have no side effect.
4568 A function descriptor always requires a FUNCDESC_VALUE relocation.
4569 Whether it's in .plt.rel or not depends on whether lazy binding is
4570 enabled and on whether the referenced symbol is dynamic.
4572 The existence of a lazy PLT requires the resolverStub lazy PLT
4573 entry to be present.
4576 As for assignment of GOT, PLT and lazy PLT entries, and private
4577 descriptors, we might do them all sequentially, but we can do
4578 better than that. For example, we can place GOT entries and
4579 private function descriptors referenced using 12-bit operands
4580 closer to the PIC register value, such that these relocations don't
4581 overflow. Those that are only referenced with LO16 relocations
4582 could come next, but we may as well place PLT-required function
4583 descriptors in the 12-bit range to make them shorter. Symbols
4584 referenced with LO16/HI16 may come next, but we may place
4585 additional function descriptors in the 16-bit range if we can
4586 reliably tell that we've already placed entries that are ever
4587 referenced with only LO16. PLT entries are therefore generated as
4588 small as possible, while not introducing relocation overflows in
4589 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4590 generated before or after PLT entries, but not intermingled with
4591 them, such that we can have more lazy PLT entries in range for a
4592 branch to the resolverStub. The resolverStub should be emitted at
4593 the most distant location from the first lazy PLT entry such that
4594 it's still in range for a branch, or closer, if there isn't a need
4595 for so many lazy PLT entries. Additional lazy PLT entries may be
4596 emitted after the resolverStub, as long as branches are still in
4597 range. If the branch goes out of range, longer lazy PLT entries
4600 We could further optimize PLT and lazy PLT entries by giving them
4601 priority in assignment to closer-to-gr17 locations depending on the
4602 number of occurrences of references to them (assuming a function
4603 that's called more often is more important for performance, so its
4604 PLT entry should be faster), or taking hints from the compiler.
4605 Given infinite time and money... :-) */
4608 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4609 asection *sec, const Elf_Internal_Rela *relocs)
4611 Elf_Internal_Shdr *symtab_hdr;
4612 struct elf_link_hash_entry **sym_hashes;
4613 const Elf_Internal_Rela *rel;
4614 const Elf_Internal_Rela *rel_end;
4616 struct bfinfdpic_relocs_info *picrel;
4618 if (info->relocatable)
4621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4622 sym_hashes = elf_sym_hashes (abfd);
4624 dynobj = elf_hash_table (info)->dynobj;
4625 rel_end = relocs + sec->reloc_count;
4626 for (rel = relocs; rel < rel_end; rel++)
4628 struct elf_link_hash_entry *h;
4629 unsigned long r_symndx;
4631 r_symndx = ELF32_R_SYM (rel->r_info);
4632 if (r_symndx < symtab_hdr->sh_info)
4635 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4637 switch (ELF32_R_TYPE (rel->r_info))
4639 case R_BFIN_GOT17M4:
4642 case R_BFIN_FUNCDESC_GOT17M4:
4643 case R_BFIN_FUNCDESC_GOTHI:
4644 case R_BFIN_FUNCDESC_GOTLO:
4645 case R_BFIN_GOTOFF17M4:
4646 case R_BFIN_GOTOFFHI:
4647 case R_BFIN_GOTOFFLO:
4648 case R_BFIN_FUNCDESC_GOTOFF17M4:
4649 case R_BFIN_FUNCDESC_GOTOFFHI:
4650 case R_BFIN_FUNCDESC_GOTOFFLO:
4651 case R_BFIN_FUNCDESC:
4652 case R_BFIN_FUNCDESC_VALUE:
4653 if (! IS_FDPIC (abfd))
4657 case R_pcrel24_jump_l:
4659 if (IS_FDPIC (abfd) && ! dynobj)
4661 elf_hash_table (info)->dynobj = dynobj = abfd;
4662 if (! _bfin_create_got_section (abfd, info))
4665 if (! IS_FDPIC (abfd))
4672 if (h->dynindx == -1)
4673 switch (ELF_ST_VISIBILITY (h->other))
4679 bfd_elf_link_record_dynamic_symbol (info, h);
4683 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4685 rel->r_addend, INSERT);
4688 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4689 (info), abfd, r_symndx,
4690 rel->r_addend, INSERT);
4700 switch (ELF32_R_TYPE (rel->r_info))
4703 case R_pcrel24_jump_l:
4704 if (IS_FDPIC (abfd))
4708 case R_BFIN_FUNCDESC_VALUE:
4709 picrel->relocsfdv++;
4710 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4715 if (! IS_FDPIC (abfd))
4719 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4723 case R_BFIN_GOT17M4:
4732 case R_BFIN_FUNCDESC_GOT17M4:
4733 picrel->fdgot17m4++;
4736 case R_BFIN_FUNCDESC_GOTHI:
4737 case R_BFIN_FUNCDESC_GOTLO:
4738 picrel->fdgothilo++;
4741 case R_BFIN_GOTOFF17M4:
4742 case R_BFIN_GOTOFFHI:
4743 case R_BFIN_GOTOFFLO:
4747 case R_BFIN_FUNCDESC_GOTOFF17M4:
4748 picrel->fdgoff17m4++;
4751 case R_BFIN_FUNCDESC_GOTOFFHI:
4752 case R_BFIN_FUNCDESC_GOTOFFLO:
4753 picrel->fdgoffhilo++;
4756 case R_BFIN_FUNCDESC:
4761 /* This relocation describes the C++ object vtable hierarchy.
4762 Reconstruct it for later use during GC. */
4763 case R_BFIN_GNU_VTINHERIT:
4764 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4768 /* This relocation describes which C++ vtable entries are actually
4769 used. Record for later use during GC. */
4770 case R_BFIN_GNU_VTENTRY:
4771 BFD_ASSERT (h != NULL);
4773 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4779 case R_pcrel12_jump_s:
4785 (*_bfd_error_handler)
4786 (_("%B: unsupported relocation type %i"),
4787 abfd, ELF32_R_TYPE (rel->r_info));
4795 /* Set the right machine number for a Blackfin ELF file. */
4798 elf32_bfin_object_p (bfd *abfd)
4800 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4801 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4802 == (IS_FDPIC (abfd)));
4806 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4808 elf_elfheader (abfd)->e_flags = flags;
4809 elf_flags_init (abfd) = TRUE;
4813 /* Copy backend specific data from one object module to another. */
4816 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4818 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4819 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4822 BFD_ASSERT (!elf_flags_init (obfd)
4823 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
4825 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
4826 elf_flags_init (obfd) = TRUE;
4828 /* Copy object attributes. */
4829 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4835 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4839 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4840 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4843 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
4846 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
4847 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
4850 /* Copy the stack size. */
4851 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
4852 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
4854 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
4856 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
4857 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
4859 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
4861 /* Rewrite the phdrs, since we're only called after they
4862 were first written. */
4863 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
4864 ->s->sizeof_ehdr, SEEK_SET) != 0
4865 || get_elf_backend_data (obfd)->s
4866 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
4867 elf_elfheader (obfd)->e_phnum) != 0)
4879 /* Display the flags field. */
4881 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
4883 FILE *file = (FILE *) ptr;
4886 BFD_ASSERT (abfd != NULL && ptr != NULL);
4888 /* Print normal ELF private data. */
4889 _bfd_elf_print_private_bfd_data (abfd, ptr);
4891 flags = elf_elfheader (abfd)->e_flags;
4893 /* xgettext:c-format */
4894 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4896 if (flags & EF_BFIN_PIC)
4897 fprintf (file, " -fpic");
4899 if (flags & EF_BFIN_FDPIC)
4900 fprintf (file, " -mfdpic");
4907 /* Merge backend specific data from an object file to the output
4908 object file when linking. */
4911 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4913 flagword old_flags, new_flags;
4914 bfd_boolean error = FALSE;
4916 new_flags = elf_elfheader (ibfd)->e_flags;
4917 old_flags = elf_elfheader (obfd)->e_flags;
4919 if (new_flags & EF_BFIN_FDPIC)
4920 new_flags &= ~EF_BFIN_PIC;
4923 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4924 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4925 bfd_get_filename (ibfd));
4928 if (!elf_flags_init (obfd)) /* First call, no flags set. */
4930 elf_flags_init (obfd) = TRUE;
4931 elf_elfheader (obfd)->e_flags = new_flags;
4934 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
4937 if (IS_FDPIC (obfd))
4938 (*_bfd_error_handler)
4939 (_("%s: cannot link non-fdpic object file into fdpic executable"),
4940 bfd_get_filename (ibfd));
4942 (*_bfd_error_handler)
4943 (_("%s: cannot link fdpic object file into non-fdpic executable"),
4944 bfd_get_filename (ibfd));
4948 bfd_set_error (bfd_error_bad_value);
4953 /* bfin ELF linker hash entry. */
4955 struct bfin_link_hash_entry
4957 struct elf_link_hash_entry root;
4959 /* Number of PC relative relocs copied for this symbol. */
4960 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
4963 /* bfin ELF linker hash table. */
4965 struct bfin_link_hash_table
4967 struct elf_link_hash_table root;
4969 /* Small local sym cache. */
4970 struct sym_cache sym_cache;
4973 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4975 static struct bfd_hash_entry *
4976 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
4977 struct bfd_hash_table *table, const char *string)
4979 struct bfd_hash_entry *ret = entry;
4981 /* Allocate the structure if it has not already been allocated by a
4984 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
4988 /* Call the allocation method of the superclass. */
4989 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
4991 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
4996 /* Create an bfin ELF linker hash table. */
4998 static struct bfd_link_hash_table *
4999 bfin_link_hash_table_create (bfd * abfd)
5001 struct bfin_link_hash_table *ret;
5002 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5004 ret = bfd_zalloc (abfd, amt);
5008 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5009 bfin_link_hash_newfunc,
5010 sizeof (struct elf_link_hash_entry)))
5016 ret->sym_cache.abfd = NULL;
5018 return &ret->root.root;
5021 /* The size in bytes of an entry in the procedure linkage table. */
5023 /* Finish up the dynamic sections. */
5026 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5027 struct bfd_link_info *info)
5032 dynobj = elf_hash_table (info)->dynobj;
5034 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5036 if (elf_hash_table (info)->dynamic_sections_created)
5038 Elf32_External_Dyn *dyncon, *dynconend;
5040 BFD_ASSERT (sdyn != NULL);
5042 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5043 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5044 for (; dyncon < dynconend; dyncon++)
5046 Elf_Internal_Dyn dyn;
5048 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5056 /* Finish up dynamic symbol handling. We set the contents of various
5057 dynamic sections here. */
5060 bfin_finish_dynamic_symbol (bfd * output_bfd,
5061 struct bfd_link_info *info,
5062 struct elf_link_hash_entry *h,
5063 Elf_Internal_Sym * sym)
5067 dynobj = elf_hash_table (info)->dynobj;
5069 if (h->got.offset != (bfd_vma) - 1)
5073 Elf_Internal_Rela rela;
5076 /* This symbol has an entry in the global offset table.
5079 sgot = bfd_get_section_by_name (dynobj, ".got");
5080 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5081 BFD_ASSERT (sgot != NULL && srela != NULL);
5083 rela.r_offset = (sgot->output_section->vma
5084 + sgot->output_offset
5085 + (h->got.offset & ~(bfd_vma) 1));
5087 /* If this is a -Bsymbolic link, and the symbol is defined
5088 locally, we just want to emit a RELATIVE reloc. Likewise if
5089 the symbol was forced to be local because of a version file.
5090 The entry in the global offset table will already have been
5091 initialized in the relocate_section function. */
5094 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5096 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5097 rela.r_info = ELF32_R_INFO (0, R_pcrel24);
5098 rela.r_addend = bfd_get_signed_32 (output_bfd,
5102 offset & ~(bfd_vma) 1)));
5106 bfd_put_32 (output_bfd, (bfd_vma) 0,
5107 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5108 rela.r_info = ELF32_R_INFO (h->dynindx, R_got);
5112 loc = srela->contents;
5113 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5114 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5121 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5122 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5123 || h == elf_hash_table (info)->hgot)
5124 sym->st_shndx = SHN_ABS;
5129 /* Adjust a symbol defined by a dynamic object and referenced by a
5130 regular object. The current definition is in some section of the
5131 dynamic object, but we're not including those sections. We have to
5132 change the definition to something the rest of the link can
5136 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5137 struct elf_link_hash_entry *h)
5141 unsigned int power_of_two;
5143 dynobj = elf_hash_table (info)->dynobj;
5145 /* Make sure we know what is going on here. */
5146 BFD_ASSERT (dynobj != NULL
5148 || h->u.weakdef != NULL
5149 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5151 /* If this is a function, put it in the procedure linkage table. We
5152 will fill in the contents of the procedure linkage table later,
5153 when we know the address of the .got section. */
5154 if (h->type == STT_FUNC || h->needs_plt)
5159 /* If this is a weak symbol, and there is a real definition, the
5160 processor independent code will have arranged for us to see the
5161 real definition first, and we can just use the same value. */
5162 if (h->u.weakdef != NULL)
5164 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5165 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5166 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5167 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5171 /* This is a reference to a symbol defined by a dynamic object which
5172 is not a function. */
5174 /* If we are creating a shared library, we must presume that the
5175 only references to the symbol are via the global offset table.
5176 For such cases we need not do anything here; the relocations will
5177 be handled correctly by relocate_section. */
5181 /* We must allocate the symbol in our .dynbss section, which will
5182 become part of the .bss section of the executable. There will be
5183 an entry for this symbol in the .dynsym section. The dynamic
5184 object will contain position independent code, so all references
5185 from the dynamic object to this symbol will go through the global
5186 offset table. The dynamic linker will use the .dynsym entry to
5187 determine the address it must put in the global offset table, so
5188 both the dynamic object and the regular object will refer to the
5189 same memory location for the variable. */
5191 s = bfd_get_section_by_name (dynobj, ".dynbss");
5192 BFD_ASSERT (s != NULL);
5194 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5195 copy the initial value out of the dynamic object and into the
5196 runtime process image. We need to remember the offset into the
5197 .rela.bss section we are going to use. */
5198 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5202 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5203 BFD_ASSERT (srel != NULL);
5204 srel->size += sizeof (Elf32_External_Rela);
5208 /* We need to figure out the alignment required for this symbol. I
5209 have no idea how ELF linkers handle this. */
5210 power_of_two = bfd_log2 (h->size);
5211 if (power_of_two > 3)
5214 /* Apply the required alignment. */
5215 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5216 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5218 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5222 /* Define the symbol as being at this point in the section. */
5223 h->root.u.def.section = s;
5224 h->root.u.def.value = s->size;
5226 /* Increment the section size to make room for the symbol. */
5232 /* The bfin linker needs to keep track of the number of relocs that it
5233 decides to copy in check_relocs for each symbol. This is so that it
5234 can discard PC relative relocs if it doesn't need them when linking
5235 with -Bsymbolic. We store the information in a field extending the
5236 regular ELF linker hash table. */
5238 /* This structure keeps track of the number of PC relative relocs we have
5239 copied for a given symbol. */
5241 struct bfin_pcrel_relocs_copied
5244 struct bfin_pcrel_relocs_copied *next;
5245 /* A section in dynobj. */
5247 /* Number of relocs copied in this section. */
5248 bfd_size_type count;
5251 /* This function is called via elf_link_hash_traverse if we are
5252 creating a shared object. In the -Bsymbolic case it discards the
5253 space allocated to copy PC relative relocs against symbols which
5254 are defined in regular objects. For the normal shared case, it
5255 discards space for pc-relative relocs that have become local due to
5256 symbol visibility changes. We allocated space for them in the
5257 check_relocs routine, but we won't fill them in in the
5258 relocate_section routine.
5260 We also check whether any of the remaining relocations apply
5261 against a readonly section, and set the DF_TEXTREL flag in this
5265 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5267 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5268 struct bfin_pcrel_relocs_copied *s;
5270 if (h->root.type == bfd_link_hash_warning)
5271 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5273 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5275 if ((info->flags & DF_TEXTREL) == 0)
5277 /* Look for relocations against read-only sections. */
5278 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5279 s != NULL; s = s->next)
5280 if ((s->section->flags & SEC_READONLY) != 0)
5282 info->flags |= DF_TEXTREL;
5290 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5291 s != NULL; s = s->next)
5292 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5298 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5299 struct bfd_link_info *info)
5305 dynobj = elf_hash_table (info)->dynobj;
5306 BFD_ASSERT (dynobj != NULL);
5308 if (elf_hash_table (info)->dynamic_sections_created)
5310 /* Set the contents of the .interp section to the interpreter. */
5311 if (info->executable)
5313 s = bfd_get_section_by_name (dynobj, ".interp");
5314 BFD_ASSERT (s != NULL);
5315 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5316 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5321 /* We may have created entries in the .rela.got section.
5322 However, if we are not creating the dynamic sections, we will
5323 not actually use these entries. Reset the size of .rela.got,
5324 which will cause it to get stripped from the output file
5326 s = bfd_get_section_by_name (dynobj, ".rela.got");
5331 /* If this is a -Bsymbolic shared link, then we need to discard all
5332 PC relative relocs against symbols defined in a regular object.
5333 For the normal shared case we discard the PC relative relocs
5334 against symbols that have become local due to visibility changes.
5335 We allocated space for them in the check_relocs routine, but we
5336 will not fill them in in the relocate_section routine. */
5338 elf_link_hash_traverse (elf_hash_table (info),
5339 bfin_discard_copies, (PTR) info);
5341 /* The check_relocs and adjust_dynamic_symbol entry points have
5342 determined the sizes of the various dynamic sections. Allocate
5345 for (s = dynobj->sections; s != NULL; s = s->next)
5350 if ((s->flags & SEC_LINKER_CREATED) == 0)
5353 /* It's OK to base decisions on the section name, because none
5354 of the dynobj section names depend upon the input files. */
5355 name = bfd_get_section_name (dynobj, s);
5359 if (CONST_STRNEQ (name, ".rela"))
5363 /* If we don't need this section, strip it from the
5364 output file. This is mostly to handle .rela.bss and
5365 .rela.plt. We must create both sections in
5366 create_dynamic_sections, because they must be created
5367 before the linker maps input sections to output
5368 sections. The linker does that before
5369 adjust_dynamic_symbol is called, and it is that
5370 function which decides whether anything needs to go
5371 into these sections. */
5378 /* We use the reloc_count field as a counter if we need
5379 to copy relocs into the output file. */
5383 else if (! CONST_STRNEQ (name, ".got"))
5385 /* It's not one of our sections, so don't allocate space. */
5391 s->flags |= SEC_EXCLUDE;
5395 /* Allocate memory for the section contents. */
5396 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5397 Unused entries should be reclaimed before the section's contents
5398 are written out, but at the moment this does not happen. Thus in
5399 order to prevent writing out garbage, we initialise the section's
5400 contents to zero. */
5401 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5402 if (s->contents == NULL && s->size != 0)
5406 if (elf_hash_table (info)->dynamic_sections_created)
5408 /* Add some entries to the .dynamic section. We fill in the
5409 values later, in bfin_finish_dynamic_sections, but we
5410 must add the entries now so that we get the correct size for
5411 the .dynamic section. The DT_DEBUG entry is filled in by the
5412 dynamic linker and used by the debugger. */
5413 #define add_dynamic_entry(TAG, VAL) \
5414 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5418 if (!add_dynamic_entry (DT_DEBUG, 0))
5425 if (!add_dynamic_entry (DT_RELA, 0)
5426 || !add_dynamic_entry (DT_RELASZ, 0)
5427 || !add_dynamic_entry (DT_RELAENT,
5428 sizeof (Elf32_External_Rela)))
5432 if ((info->flags & DF_TEXTREL) != 0)
5434 if (!add_dynamic_entry (DT_TEXTREL, 0))
5438 #undef add_dynamic_entry
5443 /* Given a .data section and a .emreloc in-memory section, store
5444 relocation information into the .emreloc section which can be
5445 used at runtime to relocate the section. This is called by the
5446 linker when the --embedded-relocs switch is used. This is called
5447 after the add_symbols entry point has been called for all the
5448 objects, and before the final_link entry point is called. */
5450 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5451 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5454 bfd_bfin_elf32_create_embedded_relocs (
5456 struct bfd_link_info *info,
5461 Elf_Internal_Shdr *symtab_hdr;
5462 Elf_Internal_Sym *isymbuf = NULL;
5463 Elf_Internal_Rela *internal_relocs = NULL;
5464 Elf_Internal_Rela *irel, *irelend;
5468 BFD_ASSERT (! info->relocatable);
5472 if (datasec->reloc_count == 0)
5475 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5477 /* Get a copy of the native relocations. */
5478 internal_relocs = (_bfd_elf_link_read_relocs
5479 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5480 info->keep_memory));
5481 if (internal_relocs == NULL)
5484 amt = (bfd_size_type) datasec->reloc_count * 12;
5485 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5486 if (relsec->contents == NULL)
5489 p = relsec->contents;
5491 irelend = internal_relocs + datasec->reloc_count;
5492 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5494 asection *targetsec;
5496 /* We are going to write a four byte longword into the runtime
5497 reloc section. The longword will be the address in the data
5498 section which must be relocated. It is followed by the name
5499 of the target section NUL-padded or truncated to 8
5502 /* We can only relocate absolute longword relocs at run time. */
5503 if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data)
5505 *errmsg = _("unsupported reloc type");
5506 bfd_set_error (bfd_error_bad_value);
5510 /* Get the target section referred to by the reloc. */
5511 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5513 /* A local symbol. */
5514 Elf_Internal_Sym *isym;
5516 /* Read this BFD's local symbols if we haven't done so already. */
5517 if (isymbuf == NULL)
5519 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5520 if (isymbuf == NULL)
5521 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5522 symtab_hdr->sh_info, 0,
5524 if (isymbuf == NULL)
5528 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5529 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5534 struct elf_link_hash_entry *h;
5536 /* An external symbol. */
5537 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5538 h = elf_sym_hashes (abfd)[indx];
5539 BFD_ASSERT (h != NULL);
5540 if (h->root.type == bfd_link_hash_defined
5541 || h->root.type == bfd_link_hash_defweak)
5542 targetsec = h->root.u.def.section;
5547 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5548 memset (p + 4, 0, 8);
5549 if (targetsec != NULL)
5550 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5553 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5555 if (internal_relocs != NULL
5556 && elf_section_data (datasec)->relocs != internal_relocs)
5557 free (internal_relocs);
5561 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5563 if (internal_relocs != NULL
5564 && elf_section_data (datasec)->relocs != internal_relocs)
5565 free (internal_relocs);
5569 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5571 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5572 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5573 { NULL, 0, 0, 0, 0 }
5577 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5578 #define TARGET_LITTLE_NAME "elf32-bfin"
5579 #define ELF_ARCH bfd_arch_bfin
5580 #define ELF_MACHINE_CODE EM_BLACKFIN
5581 #define ELF_MAXPAGESIZE 0x1000
5582 #define elf_symbol_leading_char '_'
5584 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5585 #define bfd_elf32_bfd_reloc_name_lookup \
5586 bfin_bfd_reloc_name_lookup
5587 #define elf_info_to_howto bfin_info_to_howto
5588 #define elf_info_to_howto_rel 0
5589 #define elf_backend_object_p elf32_bfin_object_p
5591 #define bfd_elf32_bfd_is_local_label_name \
5592 bfin_is_local_label_name
5593 #define bfin_hash_table(p) \
5594 ((struct bfin_link_hash_table *) (p)->hash)
5598 #define elf_backend_create_dynamic_sections \
5599 _bfd_elf_create_dynamic_sections
5600 #define bfd_elf32_bfd_link_hash_table_create \
5601 bfin_link_hash_table_create
5602 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5604 #define elf_backend_check_relocs bfin_check_relocs
5605 #define elf_backend_adjust_dynamic_symbol \
5606 bfin_adjust_dynamic_symbol
5607 #define elf_backend_size_dynamic_sections \
5608 bfin_size_dynamic_sections
5609 #define elf_backend_relocate_section bfin_relocate_section
5610 #define elf_backend_finish_dynamic_symbol \
5611 bfin_finish_dynamic_symbol
5612 #define elf_backend_finish_dynamic_sections \
5613 bfin_finish_dynamic_sections
5614 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5615 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5616 #define bfd_elf32_bfd_merge_private_bfd_data \
5617 elf32_bfin_merge_private_bfd_data
5618 #define bfd_elf32_bfd_set_private_flags \
5619 elf32_bfin_set_private_flags
5620 #define bfd_elf32_bfd_print_private_bfd_data \
5621 elf32_bfin_print_private_bfd_data
5622 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5623 #define elf_backend_can_gc_sections 1
5624 #define elf_backend_special_sections elf32_bfin_special_sections
5625 #define elf_backend_can_refcount 1
5626 #define elf_backend_want_got_plt 0
5627 #define elf_backend_plt_readonly 1
5628 #define elf_backend_want_plt_sym 0
5629 #define elf_backend_got_header_size 12
5630 #define elf_backend_rela_normal 1
5632 #include "elf32-target.h"
5634 #undef TARGET_LITTLE_SYM
5635 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5636 #undef TARGET_LITTLE_NAME
5637 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5639 #define elf32_bed elf32_bfinfdpic_bed
5641 #undef elf_backend_gc_sweep_hook
5642 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5644 #undef elf_backend_got_header_size
5645 #define elf_backend_got_header_size 0
5647 #undef elf_backend_relocate_section
5648 #define elf_backend_relocate_section bfinfdpic_relocate_section
5649 #undef elf_backend_check_relocs
5650 #define elf_backend_check_relocs bfinfdpic_check_relocs
5652 #undef bfd_elf32_bfd_link_hash_table_create
5653 #define bfd_elf32_bfd_link_hash_table_create \
5654 bfinfdpic_elf_link_hash_table_create
5655 #undef elf_backend_always_size_sections
5656 #define elf_backend_always_size_sections \
5657 elf32_bfinfdpic_always_size_sections
5658 #undef elf_backend_modify_program_headers
5659 #define elf_backend_modify_program_headers \
5660 elf32_bfinfdpic_modify_program_headers
5661 #undef bfd_elf32_bfd_copy_private_bfd_data
5662 #define bfd_elf32_bfd_copy_private_bfd_data \
5663 elf32_bfinfdpic_copy_private_bfd_data
5665 #undef elf_backend_create_dynamic_sections
5666 #define elf_backend_create_dynamic_sections \
5667 elf32_bfinfdpic_create_dynamic_sections
5668 #undef elf_backend_adjust_dynamic_symbol
5669 #define elf_backend_adjust_dynamic_symbol \
5670 elf32_bfinfdpic_adjust_dynamic_symbol
5671 #undef elf_backend_size_dynamic_sections
5672 #define elf_backend_size_dynamic_sections \
5673 elf32_bfinfdpic_size_dynamic_sections
5674 #undef elf_backend_finish_dynamic_symbol
5675 #define elf_backend_finish_dynamic_symbol \
5676 elf32_bfinfdpic_finish_dynamic_symbol
5677 #undef elf_backend_finish_dynamic_sections
5678 #define elf_backend_finish_dynamic_sections \
5679 elf32_bfinfdpic_finish_dynamic_sections
5681 #undef elf_backend_can_make_relative_eh_frame
5682 #define elf_backend_can_make_relative_eh_frame \
5683 bfinfdpic_elf_use_relative_eh_frame
5684 #undef elf_backend_can_make_lsda_relative_eh_frame
5685 #define elf_backend_can_make_lsda_relative_eh_frame \
5686 bfinfdpic_elf_use_relative_eh_frame
5687 #undef elf_backend_encode_eh_address
5688 #define elf_backend_encode_eh_address \
5689 bfinfdpic_elf_encode_eh_address
5691 #undef elf_backend_may_use_rel_p
5692 #define elf_backend_may_use_rel_p 1
5693 #undef elf_backend_may_use_rela_p
5694 #define elf_backend_may_use_rela_p 1
5695 /* We use REL for dynamic relocations only. */
5696 #undef elf_backend_default_use_rela_p
5697 #define elf_backend_default_use_rela_p 1
5699 #undef elf_backend_omit_section_dynsym
5700 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5702 #include "elf32-target.h"