1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
30 /* FUNCTION : bfin_pltpc_reloc
31 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
32 static bfd_reloc_status_type
34 bfd *abfd ATTRIBUTE_UNUSED,
35 arelent *reloc_entry ATTRIBUTE_UNUSED,
36 asymbol *symbol ATTRIBUTE_UNUSED,
37 void * data ATTRIBUTE_UNUSED,
38 asection *input_section ATTRIBUTE_UNUSED,
39 bfd *output_bfd ATTRIBUTE_UNUSED,
40 char **error_message ATTRIBUTE_UNUSED)
42 bfd_reloc_status_type flag = bfd_reloc_ok;
47 static bfd_reloc_status_type
48 bfin_pcrel24_reloc (bfd *abfd,
52 asection *input_section,
54 char **error_message ATTRIBUTE_UNUSED)
57 bfd_size_type addr = reloc_entry->address;
58 bfd_vma output_base = 0;
59 reloc_howto_type *howto = reloc_entry->howto;
60 asection *output_section;
61 bfd_boolean relocatable = (output_bfd != NULL);
63 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
64 return bfd_reloc_outofrange;
66 if (bfd_is_und_section (symbol->section)
67 && (symbol->flags & BSF_WEAK) == 0
69 return bfd_reloc_undefined;
71 if (bfd_is_com_section (symbol->section))
74 relocation = symbol->value;
76 output_section = symbol->section->output_section;
81 output_base = output_section->vma;
83 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
84 relocation += output_base + symbol->section->output_offset;
86 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
87 relocation += reloc_entry->addend;
89 relocation -= input_section->output_section->vma + input_section->output_offset;
90 relocation -= reloc_entry->address;
92 if (howto->complain_on_overflow != complain_overflow_dont)
94 bfd_reloc_status_type status;
95 status = bfd_check_overflow (howto->complain_on_overflow,
98 bfd_arch_bits_per_address(abfd),
100 if (status != bfd_reloc_ok)
104 /* if rightshift is 1 and the number odd, return error. */
105 if (howto->rightshift && (relocation & 0x01))
107 (*_bfd_error_handler) (_("relocation should be even number"));
108 return bfd_reloc_overflow;
111 relocation >>= (bfd_vma) howto->rightshift;
112 /* Shift everything up to where it's going to be used. */
114 relocation <<= (bfd_vma) howto->bitpos;
118 reloc_entry->address += input_section->output_offset;
119 reloc_entry->addend += symbol->section->output_offset;
125 /* We are getting reloc_entry->address 2 byte off from
126 the start of instruction. Assuming absolute postion
127 of the reloc data. But, following code had been written assuming
128 reloc address is starting at begining of instruction.
129 To compensate that I have increased the value of
130 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
133 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
134 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
135 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
137 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
138 x = relocation & 0xFFFF;
139 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
144 static bfd_reloc_status_type
145 bfin_imm16_reloc (bfd *abfd,
146 arelent *reloc_entry,
149 asection *input_section,
151 char **error_message ATTRIBUTE_UNUSED)
153 bfd_vma relocation, x;
154 bfd_size_type reloc_addr = reloc_entry->address;
155 bfd_vma output_base = 0;
156 reloc_howto_type *howto = reloc_entry->howto;
157 asection *output_section;
158 bfd_boolean relocatable = (output_bfd != NULL);
160 /* Is the address of the relocation really within the section? */
161 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
162 return bfd_reloc_outofrange;
164 if (bfd_is_und_section (symbol->section)
165 && (symbol->flags & BSF_WEAK) == 0
167 return bfd_reloc_undefined;
169 output_section = symbol->section->output_section;
170 relocation = symbol->value;
172 /* Convert input-section-relative symbol value to absolute. */
176 output_base = output_section->vma;
178 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
179 relocation += output_base + symbol->section->output_offset;
181 /* Add in supplied addend. */
182 relocation += reloc_entry->addend;
186 reloc_entry->address += input_section->output_offset;
187 reloc_entry->addend += symbol->section->output_offset;
191 reloc_entry->addend = 0;
194 if (howto->complain_on_overflow != complain_overflow_dont)
196 bfd_reloc_status_type flag;
197 flag = bfd_check_overflow (howto->complain_on_overflow,
200 bfd_arch_bits_per_address(abfd),
202 if (flag != bfd_reloc_ok)
206 /* Here the variable relocation holds the final address of the
207 symbol we are relocating against, plus any addend. */
209 relocation >>= (bfd_vma) howto->rightshift;
211 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
216 static bfd_reloc_status_type
217 bfin_byte4_reloc (bfd *abfd,
218 arelent *reloc_entry,
221 asection *input_section,
223 char **error_message ATTRIBUTE_UNUSED)
225 bfd_vma relocation, x;
226 bfd_size_type addr = reloc_entry->address;
227 bfd_vma output_base = 0;
228 asection *output_section;
229 bfd_boolean relocatable = (output_bfd != NULL);
231 /* Is the address of the relocation really within the section? */
232 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
233 return bfd_reloc_outofrange;
235 if (bfd_is_und_section (symbol->section)
236 && (symbol->flags & BSF_WEAK) == 0
238 return bfd_reloc_undefined;
240 output_section = symbol->section->output_section;
241 relocation = symbol->value;
242 /* Convert input-section-relative symbol value to absolute. */
246 output_base = output_section->vma;
249 && symbol->section->name
250 && !strcmp (symbol->name, symbol->section->name))
253 relocation += output_base + symbol->section->output_offset;
256 relocation += reloc_entry->addend;
260 /* This output will be relocatable ... like ld -r. */
261 reloc_entry->address += input_section->output_offset;
262 reloc_entry->addend += symbol->section->output_offset;
266 reloc_entry->addend = 0;
269 /* Here the variable relocation holds the final address of the
270 symbol we are relocating against, plus any addend. */
271 x = relocation & 0xFFFF0000;
273 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
275 x = relocation & 0x0000FFFF;
276 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
280 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
281 Use this instead of bfd_perform_relocation. */
282 static bfd_reloc_status_type
283 bfin_bfd_reloc (bfd *abfd,
284 arelent *reloc_entry,
287 asection *input_section,
289 char **error_message ATTRIBUTE_UNUSED)
292 bfd_size_type addr = reloc_entry->address;
293 bfd_vma output_base = 0;
294 reloc_howto_type *howto = reloc_entry->howto;
295 asection *output_section;
296 bfd_boolean relocatable = (output_bfd != NULL);
298 /* Is the address of the relocation really within the section? */
299 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
300 return bfd_reloc_outofrange;
302 if (bfd_is_und_section (symbol->section)
303 && (symbol->flags & BSF_WEAK) == 0
305 return bfd_reloc_undefined;
307 /* Get symbol value. (Common symbols are special.) */
308 if (bfd_is_com_section (symbol->section))
311 relocation = symbol->value;
313 output_section = symbol->section->output_section;
315 /* Convert input-section-relative symbol value to absolute. */
319 output_base = output_section->vma;
321 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
322 relocation += output_base + symbol->section->output_offset;
324 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
326 /* Add in supplied addend. */
327 relocation += reloc_entry->addend;
330 /* Here the variable relocation holds the final address of the
331 symbol we are relocating against, plus any addend. */
333 if (howto->pc_relative == TRUE)
335 relocation -= input_section->output_section->vma + input_section->output_offset;
337 if (howto->pcrel_offset == TRUE)
338 relocation -= reloc_entry->address;
343 reloc_entry->address += input_section->output_offset;
344 reloc_entry->addend += symbol->section->output_offset;
347 if (howto->complain_on_overflow != complain_overflow_dont)
349 bfd_reloc_status_type status;
351 status = bfd_check_overflow (howto->complain_on_overflow,
354 bfd_arch_bits_per_address(abfd),
356 if (status != bfd_reloc_ok)
360 /* If rightshift is 1 and the number odd, return error. */
361 if (howto->rightshift && (relocation & 0x01))
363 (*_bfd_error_handler) (_("relocation should be even number"));
364 return bfd_reloc_overflow;
367 relocation >>= (bfd_vma) howto->rightshift;
369 /* Shift everything up to where it's going to be used. */
371 relocation <<= (bfd_vma) howto->bitpos;
374 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
376 /* handle 8 and 16 bit relocations here. */
381 char x = bfd_get_8 (abfd, (char *) data + addr);
383 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
389 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
391 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
396 return bfd_reloc_other;
402 /* HOWTO Table for blackfin.
403 Blackfin relocations are fairly complicated.
404 Some of the salient features are
405 a. Even numbered offsets. A number of (not all) relocations are
406 even numbered. This means that the rightmost bit is not stored.
407 Needs to right shift by 1 and check to see if value is not odd
408 b. A relocation can be an expression. An expression takes on
409 a variety of relocations arranged in a stack.
410 As a result, we cannot use the standard generic function as special
411 function. We will have our own, which is very similar to the standard
412 generic function except that it understands how to get the value from
413 the relocation stack. . */
415 #define BFIN_RELOC_MIN 0
416 #define BFIN_RELOC_MAX 0x21
417 #define BFIN_GNUEXT_RELOC_MIN 0x40
418 #define BFIN_GNUEXT_RELOC_MAX 0x43
419 #define BFIN_ARELOC_MIN 0xE0
420 #define BFIN_ARELOC_MAX 0xF3
422 static reloc_howto_type bfin_howto_table [] =
424 /* This reloc does nothing. . */
425 HOWTO (R_BFIN_UNUSED0, /* type. */
427 2, /* size (0 = byte, 1 = short, 2 = long). */
429 FALSE, /* pc_relative. */
431 complain_overflow_bitfield, /* complain_on_overflow. */
432 bfd_elf_generic_reloc, /* special_function. */
433 "R_BFIN_UNUSED0", /* name. */
434 FALSE, /* partial_inplace. */
437 FALSE), /* pcrel_offset. */
439 HOWTO (R_BFIN_PCREL5M2, /* type. */
441 1, /* size (0 = byte, 1 = short, 2 = long).. */
443 TRUE, /* pc_relative. */
445 complain_overflow_unsigned, /* complain_on_overflow. */
446 bfin_bfd_reloc, /* special_function. */
447 "R_BFIN_PCREL5M2", /* name. */
448 FALSE, /* partial_inplace. */
450 0x0000000F, /* dst_mask. */
451 FALSE), /* pcrel_offset. */
453 HOWTO (R_BFIN_UNUSED1, /* type. */
455 2, /* size (0 = byte, 1 = short, 2 = long). */
457 FALSE, /* pc_relative. */
459 complain_overflow_bitfield, /* complain_on_overflow. */
460 bfd_elf_generic_reloc, /* special_function. */
461 "R_BFIN_UNUSED1", /* name. */
462 FALSE, /* partial_inplace. */
465 FALSE), /* pcrel_offset. */
467 HOWTO (R_BFIN_PCREL10, /* type. */
469 1, /* size (0 = byte, 1 = short, 2 = long). */
471 TRUE, /* pc_relative. */
473 complain_overflow_signed, /* complain_on_overflow. */
474 bfin_bfd_reloc, /* special_function. */
475 "R_BFIN_PCREL10", /* name. */
476 FALSE, /* partial_inplace. */
478 0x000003FF, /* dst_mask. */
479 TRUE), /* pcrel_offset. */
481 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */
483 /* the offset is actually 13 bit
484 aligned on a word boundary so
485 only 12 bits have to be used.
486 Right shift the rightmost bit.. */
487 1, /* size (0 = byte, 1 = short, 2 = long). */
489 TRUE, /* pc_relative. */
491 complain_overflow_signed, /* complain_on_overflow. */
492 bfin_bfd_reloc, /* special_function. */
493 "R_BFIN_PCREL12_JUMP", /* name. */
494 FALSE, /* partial_inplace. */
496 0x0FFF, /* dst_mask. */
497 TRUE), /* pcrel_offset. */
499 HOWTO (R_BFIN_RIMM16, /* type. */
501 1, /* size (0 = byte, 1 = short, 2 = long). */
503 FALSE, /* pc_relative. */
505 complain_overflow_signed, /* complain_on_overflow. */
506 bfin_imm16_reloc, /* special_function. */
507 "R_BFIN_RIMM16", /* name. */
508 FALSE, /* partial_inplace. */
510 0x0000FFFF, /* dst_mask. */
511 TRUE), /* pcrel_offset. */
513 HOWTO (R_BFIN_LUIMM16, /* type. */
515 1, /* size (0 = byte, 1 = short, 2 = long). */
517 FALSE, /* pc_relative. */
519 complain_overflow_dont, /* complain_on_overflow. */
520 bfin_imm16_reloc, /* special_function. */
521 "R_BFIN_LUIMM16", /* name. */
522 FALSE, /* partial_inplace. */
524 0x0000FFFF, /* dst_mask. */
525 TRUE), /* pcrel_offset. */
527 HOWTO (R_BFIN_HUIMM16, /* type. */
528 16, /* rightshift. */
529 1, /* size (0 = byte, 1 = short, 2 = long). */
531 FALSE, /* pc_relative. */
533 complain_overflow_unsigned, /* complain_on_overflow. */
534 bfin_imm16_reloc, /* special_function. */
535 "R_BFIN_HUIMM16", /* name. */
536 FALSE, /* partial_inplace. */
538 0x0000FFFF, /* dst_mask. */
539 TRUE), /* pcrel_offset. */
541 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */
543 1, /* size (0 = byte, 1 = short, 2 = long). */
545 TRUE, /* pc_relative. */
547 complain_overflow_signed, /* complain_on_overflow. */
548 bfin_bfd_reloc, /* special_function. */
549 "R_BFIN_PCREL12_JUMP_S", /* name. */
550 FALSE, /* partial_inplace. */
552 0x00000FFF, /* dst_mask. */
553 TRUE), /* pcrel_offset. */
555 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */
557 2, /* size (0 = byte, 1 = short, 2 = long). */
559 TRUE, /* pc_relative. */
561 complain_overflow_signed, /* complain_on_overflow. */
562 bfin_pcrel24_reloc, /* special_function. */
563 "R_BFIN_PCREL24_JUMP_X", /* name. */
564 FALSE, /* partial_inplace. */
566 0x00FFFFFF, /* dst_mask. */
567 TRUE), /* pcrel_offset. */
569 HOWTO (R_BFIN_PCREL24, /* type. */
571 2, /* size (0 = byte, 1 = short, 2 = long). */
573 TRUE, /* pc_relative. */
575 complain_overflow_signed, /* complain_on_overflow. */
576 bfin_pcrel24_reloc, /* special_function. */
577 "R_BFIN_PCREL24", /* name. */
578 FALSE, /* partial_inplace. */
580 0x00FFFFFF, /* dst_mask. */
581 TRUE), /* pcrel_offset. */
583 HOWTO (R_BFIN_UNUSEDB, /* type. */
585 2, /* size (0 = byte, 1 = short, 2 = long). */
587 FALSE, /* pc_relative. */
589 complain_overflow_dont, /* complain_on_overflow. */
590 bfd_elf_generic_reloc, /* special_function. */
591 "R_BFIN_UNUSEDB", /* name. */
592 FALSE, /* partial_inplace. */
595 FALSE), /* pcrel_offset. */
597 HOWTO (R_BFIN_UNUSEDC, /* type. */
599 2, /* size (0 = byte, 1 = short, 2 = long). */
601 FALSE, /* pc_relative. */
603 complain_overflow_dont, /* complain_on_overflow. */
604 bfd_elf_generic_reloc, /* special_function. */
605 "R_BFIN_UNUSEDC", /* name. */
606 FALSE, /* partial_inplace. */
609 FALSE), /* pcrel_offset. */
611 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */
613 2, /* size (0 = byte, 1 = short, 2 = long). */
615 TRUE, /* pc_relative. */
617 complain_overflow_signed, /* complain_on_overflow. */
618 bfin_pcrel24_reloc, /* special_function. */
619 "R_BFIN_PCREL24_JUMP_L", /* name. */
620 FALSE, /* partial_inplace. */
622 0x00FFFFFF, /* dst_mask. */
623 TRUE), /* pcrel_offset. */
625 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */
627 2, /* size (0 = byte, 1 = short, 2 = long). */
629 TRUE, /* pc_relative. */
631 complain_overflow_signed, /* complain_on_overflow. */
632 bfin_pcrel24_reloc, /* special_function. */
633 "R_BFIN_PCREL24_CALL_X", /* name. */
634 FALSE, /* partial_inplace. */
636 0x00FFFFFF, /* dst_mask. */
637 TRUE), /* pcrel_offset. */
639 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */
641 2, /* size (0 = byte, 1 = short, 2 = long). */
643 FALSE, /* pc_relative. */
645 complain_overflow_bitfield, /* complain_on_overflow. */
646 bfin_bfd_reloc, /* special_function. */
647 "R_BFIN_VAR_EQ_SYMB", /* name. */
648 FALSE, /* partial_inplace. */
651 FALSE), /* pcrel_offset. */
653 HOWTO (R_BFIN_BYTE_DATA, /* type. */
655 0, /* size (0 = byte, 1 = short, 2 = long). */
657 FALSE, /* pc_relative. */
659 complain_overflow_unsigned, /* complain_on_overflow. */
660 bfin_bfd_reloc, /* special_function. */
661 "R_BFIN_BYTE_DATA", /* name. */
662 FALSE, /* partial_inplace. */
664 0xFF, /* dst_mask. */
665 TRUE), /* pcrel_offset. */
667 HOWTO (R_BFIN_BYTE2_DATA, /* type. */
669 1, /* size (0 = byte, 1 = short, 2 = long). */
671 FALSE, /* pc_relative. */
673 complain_overflow_signed, /* complain_on_overflow. */
674 bfin_bfd_reloc, /* special_function. */
675 "R_BFIN_BYTE2_DATA", /* name. */
676 FALSE, /* partial_inplace. */
678 0xFFFF, /* dst_mask. */
679 TRUE), /* pcrel_offset. */
681 HOWTO (R_BFIN_BYTE4_DATA, /* type. */
683 2, /* size (0 = byte, 1 = short, 2 = long). */
685 FALSE, /* pc_relative. */
687 complain_overflow_unsigned, /* complain_on_overflow. */
688 bfin_byte4_reloc, /* special_function. */
689 "R_BFIN_BYTE4_DATA", /* name. */
690 FALSE, /* partial_inplace. */
692 0xFFFFFFFF, /* dst_mask. */
693 TRUE), /* pcrel_offset. */
695 HOWTO (R_BFIN_PCREL11, /* type. */
697 1, /* size (0 = byte, 1 = short, 2 = long). */
699 TRUE, /* pc_relative. */
701 complain_overflow_unsigned, /* complain_on_overflow. */
702 bfin_bfd_reloc, /* special_function. */
703 "R_BFIN_PCREL11", /* name. */
704 FALSE, /* partial_inplace. */
706 0x000003FF, /* dst_mask. */
707 FALSE), /* pcrel_offset. */
710 /* A 18-bit signed operand with the GOT offset for the address of
712 HOWTO (R_BFIN_GOT17M4, /* type */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
716 FALSE, /* pc_relative */
718 complain_overflow_signed, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_BFIN_GOT17M4", /* name */
721 FALSE, /* partial_inplace */
722 0xffff, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
726 /* The upper 16 bits of the GOT offset for the address of the
728 HOWTO (R_BFIN_GOTHI, /* type */
730 1, /* size (0 = byte, 1 = short, 2 = long) */
732 FALSE, /* pc_relative */
734 complain_overflow_dont, /* complain_on_overflow */
735 bfd_elf_generic_reloc, /* special_function */
736 "R_BFIN_GOTHI", /* name */
737 FALSE, /* partial_inplace */
738 0xffff, /* src_mask */
739 0xffff, /* dst_mask */
740 FALSE), /* pcrel_offset */
742 /* The lower 16 bits of the GOT offset for the address of the
744 HOWTO (R_BFIN_GOTLO, /* type */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
748 FALSE, /* pc_relative */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_BFIN_GOTLO", /* name */
753 FALSE, /* partial_inplace */
754 0xffff, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
758 /* The 32-bit address of the canonical descriptor of a function. */
759 HOWTO (R_BFIN_FUNCDESC, /* type */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
763 FALSE, /* pc_relative */
765 complain_overflow_bitfield, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 "R_BFIN_FUNCDESC", /* name */
768 FALSE, /* partial_inplace */
769 0xffffffff, /* src_mask */
770 0xffffffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
773 /* A 12-bit signed operand with the GOT offset for the address of
774 canonical descriptor of a function. */
775 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
777 1, /* size (0 = byte, 1 = short, 2 = long) */
779 FALSE, /* pc_relative */
781 complain_overflow_signed, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 "R_BFIN_FUNCDESC_GOT17M4", /* name */
784 FALSE, /* partial_inplace */
785 0xffff, /* src_mask */
786 0xffff, /* dst_mask */
787 FALSE), /* pcrel_offset */
789 /* The upper 16 bits of the GOT offset for the address of the
790 canonical descriptor of a function. */
791 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
793 1, /* size (0 = byte, 1 = short, 2 = long) */
795 FALSE, /* pc_relative */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_BFIN_FUNCDESC_GOTHI", /* name */
800 FALSE, /* partial_inplace */
801 0xffff, /* src_mask */
802 0xffff, /* dst_mask */
803 FALSE), /* pcrel_offset */
805 /* The lower 16 bits of the GOT offset for the address of the
806 canonical descriptor of a function. */
807 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
809 1, /* size (0 = byte, 1 = short, 2 = long) */
811 FALSE, /* pc_relative */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 "R_BFIN_FUNCDESC_GOTLO", /* name */
816 FALSE, /* partial_inplace */
817 0xffff, /* src_mask */
818 0xffff, /* dst_mask */
819 FALSE), /* pcrel_offset */
821 /* The 32-bit address of the canonical descriptor of a function. */
822 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
826 FALSE, /* pc_relative */
828 complain_overflow_bitfield, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 "R_BFIN_FUNCDESC_VALUE", /* name */
831 FALSE, /* partial_inplace */
832 0xffffffff, /* src_mask */
833 0xffffffff, /* dst_mask */
834 FALSE), /* pcrel_offset */
836 /* A 12-bit signed operand with the GOT offset for the address of
837 canonical descriptor of a function. */
838 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
840 1, /* size (0 = byte, 1 = short, 2 = long) */
842 FALSE, /* pc_relative */
844 complain_overflow_signed, /* complain_on_overflow */
845 bfd_elf_generic_reloc, /* special_function */
846 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
847 FALSE, /* partial_inplace */
848 0xffff, /* src_mask */
849 0xffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
852 /* The upper 16 bits of the GOT offset for the address of the
853 canonical descriptor of a function. */
854 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
856 1, /* size (0 = byte, 1 = short, 2 = long) */
858 FALSE, /* pc_relative */
860 complain_overflow_dont, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
863 FALSE, /* partial_inplace */
864 0xffff, /* src_mask */
865 0xffff, /* dst_mask */
866 FALSE), /* pcrel_offset */
868 /* The lower 16 bits of the GOT offset for the address of the
869 canonical descriptor of a function. */
870 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
872 1, /* size (0 = byte, 1 = short, 2 = long) */
874 FALSE, /* pc_relative */
876 complain_overflow_dont, /* complain_on_overflow */
877 bfd_elf_generic_reloc, /* special_function */
878 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
879 FALSE, /* partial_inplace */
880 0xffff, /* src_mask */
881 0xffff, /* dst_mask */
882 FALSE), /* pcrel_offset */
884 /* A 12-bit signed operand with the GOT offset for the address of
886 HOWTO (R_BFIN_GOTOFF17M4, /* type */
888 1, /* size (0 = byte, 1 = short, 2 = long) */
890 FALSE, /* pc_relative */
892 complain_overflow_signed, /* complain_on_overflow */
893 bfd_elf_generic_reloc, /* special_function */
894 "R_BFIN_GOTOFF17M4", /* name */
895 FALSE, /* partial_inplace */
896 0xffff, /* src_mask */
897 0xffff, /* dst_mask */
898 FALSE), /* pcrel_offset */
900 /* The upper 16 bits of the GOT offset for the address of the
902 HOWTO (R_BFIN_GOTOFFHI, /* type */
904 1, /* size (0 = byte, 1 = short, 2 = long) */
906 FALSE, /* pc_relative */
908 complain_overflow_dont, /* complain_on_overflow */
909 bfd_elf_generic_reloc, /* special_function */
910 "R_BFIN_GOTOFFHI", /* name */
911 FALSE, /* partial_inplace */
912 0xffff, /* src_mask */
913 0xffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
916 /* The lower 16 bits of the GOT offset for the address of the
918 HOWTO (R_BFIN_GOTOFFLO, /* type */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
922 FALSE, /* pc_relative */
924 complain_overflow_dont, /* complain_on_overflow */
925 bfd_elf_generic_reloc, /* special_function */
926 "R_BFIN_GOTOFFLO", /* name */
927 FALSE, /* partial_inplace */
928 0xffff, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
933 static reloc_howto_type bfin_gnuext_howto_table [] =
935 HOWTO (R_BFIN_PLTPC, /* type. */
937 1, /* size (0 = byte, 1 = short, 2 = long). */
939 FALSE, /* pc_relative. */
941 complain_overflow_bitfield, /* complain_on_overflow. */
942 bfin_pltpc_reloc, /* special_function. */
943 "R_BFIN_PLTPC", /* name. */
944 FALSE, /* partial_inplace. */
945 0xffff, /* src_mask. */
946 0xffff, /* dst_mask. */
947 FALSE), /* pcrel_offset. */
949 HOWTO (R_BFIN_GOT, /* type. */
951 1, /* size (0 = byte, 1 = short, 2 = long). */
953 FALSE, /* pc_relative. */
955 complain_overflow_bitfield, /* complain_on_overflow. */
956 bfd_elf_generic_reloc, /* special_function. */
957 "R_BFIN_GOT", /* name. */
958 FALSE, /* partial_inplace. */
959 0x7fff, /* src_mask. */
960 0x7fff, /* dst_mask. */
961 FALSE), /* pcrel_offset. */
963 /* GNU extension to record C++ vtable hierarchy. */
964 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
966 2, /* size (0 = byte, 1 = short, 2 = long). */
968 FALSE, /* pc_relative. */
970 complain_overflow_dont, /* complain_on_overflow. */
971 NULL, /* special_function. */
972 "R_BFIN_GNU_VTINHERIT", /* name. */
973 FALSE, /* partial_inplace. */
976 FALSE), /* pcrel_offset. */
978 /* GNU extension to record C++ vtable member usage. */
979 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
981 2, /* size (0 = byte, 1 = short, 2 = long). */
983 FALSE, /* pc_relative. */
985 complain_overflow_dont, /* complain_on_overflow. */
986 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */
987 "R_BFIN_GNU_VTENTRY", /* name. */
988 FALSE, /* partial_inplace. */
991 FALSE) /* pcrel_offset. */
994 struct bfin_reloc_map
996 bfd_reloc_code_real_type bfd_reloc_val;
997 unsigned int bfin_reloc_val;
1000 static const struct bfin_reloc_map bfin_reloc_map [] =
1002 { BFD_RELOC_NONE, R_BFIN_UNUSED0 },
1003 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 },
1004 { BFD_RELOC_NONE, R_BFIN_UNUSED1 },
1005 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 },
1006 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP },
1007 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 },
1008 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 },
1009 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 },
1010 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S },
1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1012 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1013 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L },
1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDB },
1015 { BFD_RELOC_NONE, R_BFIN_UNUSEDC },
1016 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X },
1017 { BFD_RELOC_8, R_BFIN_BYTE_DATA },
1018 { BFD_RELOC_16, R_BFIN_BYTE2_DATA },
1019 { BFD_RELOC_32, R_BFIN_BYTE4_DATA },
1020 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 },
1021 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT },
1022 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC },
1024 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
1025 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
1026 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
1027 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
1028 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1030 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1031 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1034 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1035 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
1036 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
1037 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
1039 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
1040 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
1045 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1047 Elf_Internal_Rela *dst)
1049 unsigned int r_type;
1051 r_type = ELF32_R_TYPE (dst->r_info);
1053 if (r_type <= BFIN_RELOC_MAX)
1054 cache_ptr->howto = &bfin_howto_table [r_type];
1056 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1057 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1060 cache_ptr->howto = (reloc_howto_type *) NULL;
1063 /* Given a BFD reloc type, return the howto. */
1064 static reloc_howto_type *
1065 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1066 bfd_reloc_code_real_type code)
1069 unsigned int r_type = BFIN_RELOC_MIN;
1071 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;)
1072 if (bfin_reloc_map[i].bfd_reloc_val == code)
1073 r_type = bfin_reloc_map[i].bfin_reloc_val;
1075 if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN)
1076 return &bfin_howto_table [r_type];
1078 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1079 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1081 return (reloc_howto_type *) NULL;
1084 static reloc_howto_type *
1085 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1091 i < (sizeof (bfin_howto_table)
1092 / sizeof (bfin_howto_table[0]));
1094 if (bfin_howto_table[i].name != NULL
1095 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1096 return &bfin_howto_table[i];
1099 i < (sizeof (bfin_gnuext_howto_table)
1100 / sizeof (bfin_gnuext_howto_table[0]));
1102 if (bfin_gnuext_howto_table[i].name != NULL
1103 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1104 return &bfin_gnuext_howto_table[i];
1109 /* Given a bfin relocation type, return the howto. */
1110 static reloc_howto_type *
1111 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1112 unsigned int r_type)
1114 if (r_type <= BFIN_RELOC_MAX)
1115 return &bfin_howto_table [r_type];
1117 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1118 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1120 return (reloc_howto_type *) NULL;
1123 /* Set by ld emulation if --code-in-l1. */
1124 bfd_boolean elf32_bfin_code_in_l1 = 0;
1126 /* Set by ld emulation if --data-in-l1. */
1127 bfd_boolean elf32_bfin_data_in_l1 = 0;
1130 elf32_bfin_final_write_processing (bfd *abfd,
1131 bfd_boolean linker ATTRIBUTE_UNUSED)
1133 if (elf32_bfin_code_in_l1)
1134 elf_elfheader (abfd)->e_flags |= EF_BFIN_CODE_IN_L1;
1135 if (elf32_bfin_data_in_l1)
1136 elf_elfheader (abfd)->e_flags |= EF_BFIN_DATA_IN_L1;
1139 /* Return TRUE if the name is a local label.
1140 bfin local labels begin with L$. */
1142 bfin_is_local_label_name (bfd *abfd, const char *label)
1144 if (label[0] == 'L' && label[1] == '$' )
1147 return _bfd_elf_is_local_label_name (abfd, label);
1150 /* Look through the relocs for a section during the first phase, and
1151 allocate space in the global offset table or procedure linkage
1155 bfin_check_relocs (bfd * abfd,
1156 struct bfd_link_info *info,
1158 const Elf_Internal_Rela *relocs)
1161 Elf_Internal_Shdr *symtab_hdr;
1162 struct elf_link_hash_entry **sym_hashes;
1163 bfd_signed_vma *local_got_refcounts;
1164 const Elf_Internal_Rela *rel;
1165 const Elf_Internal_Rela *rel_end;
1169 if (info->relocatable)
1172 dynobj = elf_hash_table (info)->dynobj;
1173 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1174 sym_hashes = elf_sym_hashes (abfd);
1175 local_got_refcounts = elf_local_got_refcounts (abfd);
1180 rel_end = relocs + sec->reloc_count;
1181 for (rel = relocs; rel < rel_end; rel++)
1183 unsigned long r_symndx;
1184 struct elf_link_hash_entry *h;
1186 r_symndx = ELF32_R_SYM (rel->r_info);
1187 if (r_symndx < symtab_hdr->sh_info)
1190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1192 switch (ELF32_R_TYPE (rel->r_info))
1194 /* This relocation describes the C++ object vtable hierarchy.
1195 Reconstruct it for later use during GC. */
1196 case R_BFIN_GNU_VTINHERIT:
1197 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1201 /* This relocation describes which C++ vtable entries
1202 are actually used. Record for later use during GC. */
1203 case R_BFIN_GNU_VTENTRY:
1204 BFD_ASSERT (h != NULL);
1206 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1212 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1218 /* Create the .got section. */
1219 elf_hash_table (info)->dynobj = dynobj = abfd;
1220 if (!_bfd_elf_create_got_section (dynobj, info))
1226 sgot = bfd_get_linker_section (dynobj, ".got");
1227 BFD_ASSERT (sgot != NULL);
1230 if (srelgot == NULL && (h != NULL || info->shared))
1232 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1233 if (srelgot == NULL)
1235 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1236 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1238 srelgot = bfd_make_section_anyway_with_flags (dynobj,
1242 || !bfd_set_section_alignment (dynobj, srelgot, 2))
1249 if (h->got.refcount == 0)
1251 /* Make sure this symbol is output as a dynamic symbol. */
1252 if (h->dynindx == -1 && !h->forced_local)
1254 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1258 /* Allocate space in the .got section. */
1260 /* Allocate relocation space. */
1261 srelgot->size += sizeof (Elf32_External_Rela);
1267 /* This is a global offset table entry for a local symbol. */
1268 if (local_got_refcounts == NULL)
1272 size = symtab_hdr->sh_info;
1273 size *= sizeof (bfd_signed_vma);
1274 local_got_refcounts = ((bfd_signed_vma *)
1275 bfd_zalloc (abfd, size));
1276 if (local_got_refcounts == NULL)
1278 elf_local_got_refcounts (abfd) = local_got_refcounts;
1280 if (local_got_refcounts[r_symndx] == 0)
1285 /* If we are generating a shared object, we need to
1286 output a R_68K_RELATIVE reloc so that the dynamic
1287 linker can adjust this GOT entry. */
1288 srelgot->size += sizeof (Elf32_External_Rela);
1291 local_got_refcounts[r_symndx]++;
1303 static enum elf_reloc_type_class
1304 elf32_bfin_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
1305 const asection *rel_sec ATTRIBUTE_UNUSED,
1306 const Elf_Internal_Rela * rela)
1308 switch ((int) ELF32_R_TYPE (rela->r_info))
1311 return reloc_class_normal;
1315 static bfd_reloc_status_type
1316 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1317 bfd *input_bfd, asection *input_section,
1318 bfd_byte *contents, bfd_vma address,
1319 bfd_vma value, bfd_vma addend)
1321 int r_type = ELF32_R_TYPE (rel->r_info);
1323 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1325 bfd_reloc_status_type r = bfd_reloc_ok;
1328 if (address > bfd_get_section_limit (input_bfd, input_section))
1329 return bfd_reloc_outofrange;
1333 /* Perform usual pc-relative correction. */
1334 value -= input_section->output_section->vma + input_section->output_offset;
1337 /* We are getting reloc_entry->address 2 byte off from
1338 the start of instruction. Assuming absolute postion
1339 of the reloc data. But, following code had been written assuming
1340 reloc address is starting at begining of instruction.
1341 To compensate that I have increased the value of
1342 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1347 if ((value & 0xFF000000) != 0
1348 && (value & 0xFF000000) != 0xFF000000)
1349 r = bfd_reloc_overflow;
1353 x = bfd_get_16 (input_bfd, contents + address);
1354 x = (x & 0xff00) | ((value >> 16) & 0xff);
1355 bfd_put_16 (input_bfd, x, contents + address);
1357 x = bfd_get_16 (input_bfd, contents + address + 2);
1359 bfd_put_16 (input_bfd, x, contents + address + 2);
1363 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1364 rel->r_offset, value, addend);
1369 bfin_relocate_section (bfd * output_bfd,
1370 struct bfd_link_info *info,
1372 asection * input_section,
1373 bfd_byte * contents,
1374 Elf_Internal_Rela * relocs,
1375 Elf_Internal_Sym * local_syms,
1376 asection ** local_sections)
1379 Elf_Internal_Shdr *symtab_hdr;
1380 struct elf_link_hash_entry **sym_hashes;
1381 bfd_vma *local_got_offsets;
1383 Elf_Internal_Rela *rel;
1384 Elf_Internal_Rela *relend;
1387 dynobj = elf_hash_table (info)->dynobj;
1388 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1389 sym_hashes = elf_sym_hashes (input_bfd);
1390 local_got_offsets = elf_local_got_offsets (input_bfd);
1395 relend = relocs + input_section->reloc_count;
1396 for (; rel < relend; rel++, i++)
1399 reloc_howto_type *howto;
1400 unsigned long r_symndx;
1401 struct elf_link_hash_entry *h;
1402 Elf_Internal_Sym *sym;
1404 bfd_vma relocation = 0;
1405 bfd_boolean unresolved_reloc;
1406 bfd_reloc_status_type r;
1409 r_type = ELF32_R_TYPE (rel->r_info);
1410 if (r_type < 0 || r_type >= 243)
1412 bfd_set_error (bfd_error_bad_value);
1416 if (r_type == R_BFIN_GNU_VTENTRY
1417 || r_type == R_BFIN_GNU_VTINHERIT)
1420 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1423 bfd_set_error (bfd_error_bad_value);
1426 r_symndx = ELF32_R_SYM (rel->r_info);
1431 unresolved_reloc = FALSE;
1433 if (r_symndx < symtab_hdr->sh_info)
1435 sym = local_syms + r_symndx;
1436 sec = local_sections[r_symndx];
1437 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1443 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1444 r_symndx, symtab_hdr, sym_hashes,
1446 unresolved_reloc, warned);
1449 if (sec != NULL && discarded_section (sec))
1450 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1451 rel, 1, relend, howto, 0, contents);
1453 if (info->relocatable)
1456 address = rel->r_offset;
1458 /* Then, process normally. */
1461 case R_BFIN_GNU_VTINHERIT:
1462 case R_BFIN_GNU_VTENTRY:
1463 return bfd_reloc_ok;
1466 /* Relocation is to the address of the entry for this symbol
1467 in the global offset table. */
1469 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1472 /* Relocation is the offset of the entry for this symbol in
1473 the global offset table. */
1480 /* Create the .got section. */
1481 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1482 if (!_bfd_elf_create_got_section (dynobj, info))
1488 sgot = bfd_get_linker_section (dynobj, ".got");
1489 BFD_ASSERT (sgot != NULL);
1496 off = h->got.offset;
1497 BFD_ASSERT (off != (bfd_vma) - 1);
1498 dyn = elf_hash_table (info)->dynamic_sections_created;
1500 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1507 /* This is actually a static link, or it is a
1508 -Bsymbolic link and the symbol is defined
1509 locally, or the symbol was forced to be local
1510 because of a version file.. We must initialize
1511 this entry in the global offset table. Since
1512 the offset must always be a multiple of 4, we
1513 use the least significant bit to record whether
1514 we have initialized it already.
1516 When doing a dynamic link, we create a .rela.got
1517 relocation entry to initialize the value. This
1518 is done in the finish_dynamic_symbol routine. */
1523 bfd_put_32 (output_bfd, relocation,
1524 sgot->contents + off);
1529 unresolved_reloc = FALSE;
1533 BFD_ASSERT (local_got_offsets != NULL);
1534 off = local_got_offsets[r_symndx];
1535 BFD_ASSERT (off != (bfd_vma) - 1);
1537 /* The offset must always be a multiple of 4. We use
1538 the least significant bit to record whether we have
1539 already generated the necessary reloc. */
1544 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1549 Elf_Internal_Rela outrel;
1552 s = bfd_get_linker_section (dynobj, ".rela.got");
1553 BFD_ASSERT (s != NULL);
1555 outrel.r_offset = (sgot->output_section->vma
1556 + sgot->output_offset + off);
1558 ELF32_R_INFO (0, R_BFIN_PCREL24);
1559 outrel.r_addend = relocation;
1562 s->reloc_count++ * sizeof (Elf32_External_Rela);
1563 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1566 local_got_offsets[r_symndx] |= 1;
1570 relocation = sgot->output_offset + off;
1572 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1579 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1581 relocation, rel->r_addend);
1586 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1587 because such sections are not SEC_ALLOC and thus ld.so will
1588 not process them. */
1589 if (unresolved_reloc
1590 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic)
1591 && _bfd_elf_section_offset (output_bfd, info, input_section,
1592 rel->r_offset) != (bfd_vma) -1)
1594 (*_bfd_error_handler)
1595 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1597 input_section, (long) rel->r_offset, h->root.root.string);
1601 if (r != bfd_reloc_ok)
1606 name = h->root.root.string;
1609 name = bfd_elf_string_from_elf_section (input_bfd,
1610 symtab_hdr->sh_link,
1615 name = bfd_section_name (input_bfd, sec);
1618 if (r == bfd_reloc_overflow)
1620 if (!(info->callbacks->reloc_overflow
1621 (info, (h ? &h->root : NULL), name, howto->name,
1622 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1627 (*_bfd_error_handler)
1628 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1629 input_bfd, input_section,
1630 (long) rel->r_offset, name, (int) r);
1640 bfin_gc_mark_hook (asection * sec,
1641 struct bfd_link_info *info,
1642 Elf_Internal_Rela * rel,
1643 struct elf_link_hash_entry *h,
1644 Elf_Internal_Sym * sym)
1647 switch (ELF32_R_TYPE (rel->r_info))
1649 case R_BFIN_GNU_VTINHERIT:
1650 case R_BFIN_GNU_VTENTRY:
1654 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1657 /* Update the got entry reference counts for the section being removed. */
1660 bfin_gc_sweep_hook (bfd * abfd,
1661 struct bfd_link_info *info,
1663 const Elf_Internal_Rela * relocs)
1665 Elf_Internal_Shdr *symtab_hdr;
1666 struct elf_link_hash_entry **sym_hashes;
1667 bfd_signed_vma *local_got_refcounts;
1668 const Elf_Internal_Rela *rel, *relend;
1673 dynobj = elf_hash_table (info)->dynobj;
1677 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1678 sym_hashes = elf_sym_hashes (abfd);
1679 local_got_refcounts = elf_local_got_refcounts (abfd);
1681 sgot = bfd_get_linker_section (dynobj, ".got");
1682 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1684 relend = relocs + sec->reloc_count;
1685 for (rel = relocs; rel < relend; rel++)
1687 unsigned long r_symndx;
1688 struct elf_link_hash_entry *h;
1690 switch (ELF32_R_TYPE (rel->r_info))
1693 r_symndx = ELF32_R_SYM (rel->r_info);
1694 if (r_symndx >= symtab_hdr->sh_info)
1696 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1697 if (h->got.refcount > 0)
1700 if (h->got.refcount == 0)
1702 /* We don't need the .got entry any more. */
1704 srelgot->size -= sizeof (Elf32_External_Rela);
1708 else if (local_got_refcounts != NULL)
1710 if (local_got_refcounts[r_symndx] > 0)
1712 --local_got_refcounts[r_symndx];
1713 if (local_got_refcounts[r_symndx] == 0)
1715 /* We don't need the .got entry any more. */
1718 srelgot->size -= sizeof (Elf32_External_Rela);
1730 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1731 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1733 /* An extension of the elf hash table data structure,
1734 containing some additional Blackfin-specific data. */
1735 struct bfinfdpic_elf_link_hash_table
1737 struct elf_link_hash_table elf;
1739 /* A pointer to the .got section. */
1741 /* A pointer to the .rel.got section. */
1743 /* A pointer to the .rofixup section. */
1744 asection *sgotfixup;
1745 /* A pointer to the .plt section. */
1747 /* A pointer to the .rel.plt section. */
1749 /* GOT base offset. */
1751 /* Location of the first non-lazy PLT entry, i.e., the number of
1752 bytes taken by lazy PLT entries. */
1754 /* A hash table holding information about which symbols were
1755 referenced with which PIC-related relocations. */
1756 struct htab *relocs_info;
1757 /* Summary reloc information collected by
1758 _bfinfdpic_count_got_plt_entries. */
1759 struct _bfinfdpic_dynamic_got_info *g;
1762 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1764 #define bfinfdpic_hash_table(info) \
1765 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1766 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1768 #define bfinfdpic_got_section(info) \
1769 (bfinfdpic_hash_table (info)->sgot)
1770 #define bfinfdpic_gotrel_section(info) \
1771 (bfinfdpic_hash_table (info)->sgotrel)
1772 #define bfinfdpic_gotfixup_section(info) \
1773 (bfinfdpic_hash_table (info)->sgotfixup)
1774 #define bfinfdpic_plt_section(info) \
1775 (bfinfdpic_hash_table (info)->splt)
1776 #define bfinfdpic_pltrel_section(info) \
1777 (bfinfdpic_hash_table (info)->spltrel)
1778 #define bfinfdpic_relocs_info(info) \
1779 (bfinfdpic_hash_table (info)->relocs_info)
1780 #define bfinfdpic_got_initial_offset(info) \
1781 (bfinfdpic_hash_table (info)->got0)
1782 #define bfinfdpic_plt_initial_offset(info) \
1783 (bfinfdpic_hash_table (info)->plt0)
1784 #define bfinfdpic_dynamic_got_plt_info(info) \
1785 (bfinfdpic_hash_table (info)->g)
1787 /* The name of the dynamic interpreter. This is put in the .interp
1790 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1792 #define DEFAULT_STACK_SIZE 0x20000
1794 /* This structure is used to collect the number of entries present in
1795 each addressable range of the got. */
1796 struct _bfinfdpic_dynamic_got_info
1798 /* Several bits of information about the current link. */
1799 struct bfd_link_info *info;
1800 /* Total size needed for GOT entries within the 18- or 32-bit
1802 bfd_vma got17m4, gothilo;
1803 /* Total size needed for function descriptor entries within the 18-
1804 or 32-bit ranges. */
1805 bfd_vma fd17m4, fdhilo;
1806 /* Total size needed function descriptor entries referenced in PLT
1807 entries, that would be profitable to place in offsets close to
1808 the PIC register. */
1810 /* Total size needed by lazy PLT entries. */
1812 /* Number of relocations carried over from input object files. */
1813 unsigned long relocs;
1814 /* Number of fixups introduced by relocations in input object files. */
1815 unsigned long fixups;
1818 /* Create a Blackfin ELF linker hash table. */
1820 static struct bfd_link_hash_table *
1821 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1823 struct bfinfdpic_elf_link_hash_table *ret;
1824 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1826 ret = bfd_zmalloc (amt);
1830 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1831 _bfd_elf_link_hash_newfunc,
1832 sizeof (struct elf_link_hash_entry),
1839 return &ret->elf.root;
1842 /* Decide whether a reference to a symbol can be resolved locally or
1843 not. If the symbol is protected, we want the local address, but
1844 its function descriptor must be assigned by the dynamic linker. */
1845 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1846 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1847 || ! elf_hash_table (INFO)->dynamic_sections_created)
1848 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1849 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1851 /* This structure collects information on what kind of GOT, PLT or
1852 function descriptors are required by relocations that reference a
1854 struct bfinfdpic_relocs_info
1856 /* The index of the symbol, as stored in the relocation r_info, if
1857 we have a local symbol; -1 otherwise. */
1861 /* The input bfd in which the symbol is defined, if it's a local
1864 /* If symndx == -1, the hash table entry corresponding to a global
1865 symbol (even if it turns out to bind locally, in which case it
1866 should ideally be replaced with section's symndx + addend). */
1867 struct elf_link_hash_entry *h;
1869 /* The addend of the relocation that references the symbol. */
1872 /* The fields above are used to identify an entry. The fields below
1873 contain information on how an entry is used and, later on, which
1874 locations it was assigned. */
1875 /* The following 2 fields record whether the symbol+addend above was
1876 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1877 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1880 /* Whether a FUNCDESC relocation references symbol+addend. */
1882 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1885 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1886 unsigned fdgoff17m4;
1887 unsigned fdgoffhilo;
1888 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1889 GOTOFFHI relocations. The addend doesn't really matter, since we
1890 envision that this will only be used to check whether the symbol
1891 is mapped to the same segment as the got. */
1893 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1895 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1898 /* Whether we need a PLT entry for a symbol. Should be implied by
1900 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1902 /* Whether a function descriptor should be created in this link unit
1903 for symbol+addend. Should be implied by something like:
1904 (plt || fdgotoff17m4 || fdgotofflohi
1905 || ((fd || fdgot17m4 || fdgothilo)
1906 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1908 /* Whether a lazy PLT entry is needed for this symbol+addend.
1909 Should be implied by something like:
1910 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1911 && ! (info->flags & DF_BIND_NOW)) */
1913 /* Whether we've already emitted GOT relocations and PLT entries as
1914 needed for this symbol. */
1917 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1918 relocations referencing the symbol. */
1919 unsigned relocs32, relocsfd, relocsfdv;
1921 /* The number of .rofixups entries and dynamic relocations allocated
1922 for this symbol, minus any that might have already been used. */
1923 unsigned fixups, dynrelocs;
1925 /* The offsets of the GOT entries assigned to symbol+addend, to the
1926 function descriptor's address, and to a function descriptor,
1927 respectively. Should be zero if unassigned. The offsets are
1928 counted from the value that will be assigned to the PIC register,
1929 not from the beginning of the .got section. */
1930 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1931 /* The offsets of the PLT entries assigned to symbol+addend,
1932 non-lazy and lazy, respectively. If unassigned, should be
1934 bfd_vma plt_entry, lzplt_entry;
1937 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1939 bfinfdpic_relocs_info_hash (const void *entry_)
1941 const struct bfinfdpic_relocs_info *entry = entry_;
1943 return (entry->symndx == -1
1944 ? (long) entry->d.h->root.root.hash
1945 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1948 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1951 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1953 const struct bfinfdpic_relocs_info *e1 = entry1;
1954 const struct bfinfdpic_relocs_info *e2 = entry2;
1956 return e1->symndx == e2->symndx && e1->addend == e2->addend
1957 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1960 /* Find or create an entry in a hash table HT that matches the key
1961 fields of the given ENTRY. If it's not found, memory for a new
1962 entry is allocated in ABFD's obstack. */
1963 static struct bfinfdpic_relocs_info *
1964 bfinfdpic_relocs_info_find (struct htab *ht,
1966 const struct bfinfdpic_relocs_info *entry,
1967 enum insert_option insert)
1969 struct bfinfdpic_relocs_info **loc;
1974 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1982 *loc = bfd_zalloc (abfd, sizeof (**loc));
1987 (*loc)->symndx = entry->symndx;
1988 (*loc)->d = entry->d;
1989 (*loc)->addend = entry->addend;
1990 (*loc)->plt_entry = (bfd_vma)-1;
1991 (*loc)->lzplt_entry = (bfd_vma)-1;
1996 /* Obtain the address of the entry in HT associated with H's symbol +
1997 addend, creating a new entry if none existed. ABFD is only used
1998 for memory allocation purposes. */
1999 inline static struct bfinfdpic_relocs_info *
2000 bfinfdpic_relocs_info_for_global (struct htab *ht,
2002 struct elf_link_hash_entry *h,
2004 enum insert_option insert)
2006 struct bfinfdpic_relocs_info entry;
2010 entry.addend = addend;
2012 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2015 /* Obtain the address of the entry in HT associated with the SYMNDXth
2016 local symbol of the input bfd ABFD, plus the addend, creating a new
2017 entry if none existed. */
2018 inline static struct bfinfdpic_relocs_info *
2019 bfinfdpic_relocs_info_for_local (struct htab *ht,
2023 enum insert_option insert)
2025 struct bfinfdpic_relocs_info entry;
2027 entry.symndx = symndx;
2028 entry.d.abfd = abfd;
2029 entry.addend = addend;
2031 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2034 /* Merge fields set by check_relocs() of two entries that end up being
2035 mapped to the same (presumably global) symbol. */
2038 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2039 struct bfinfdpic_relocs_info const *e1)
2041 e2->got17m4 |= e1->got17m4;
2042 e2->gothilo |= e1->gothilo;
2044 e2->fdgot17m4 |= e1->fdgot17m4;
2045 e2->fdgothilo |= e1->fdgothilo;
2046 e2->fdgoff17m4 |= e1->fdgoff17m4;
2047 e2->fdgoffhilo |= e1->fdgoffhilo;
2048 e2->gotoff |= e1->gotoff;
2049 e2->call |= e1->call;
2053 /* Every block of 65535 lazy PLT entries shares a single call to the
2054 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2055 32767, counting from 0). All other lazy PLT entries branch to it
2056 in a single instruction. */
2058 #define LZPLT_RESOLVER_EXTRA 10
2059 #define LZPLT_NORMAL_SIZE 6
2060 #define LZPLT_ENTRIES 1362
2062 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2063 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2065 /* Add a dynamic relocation to the SRELOC section. */
2067 inline static bfd_vma
2068 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2069 int reloc_type, long dynindx, bfd_vma addend,
2070 struct bfinfdpic_relocs_info *entry)
2072 Elf_Internal_Rela outrel;
2073 bfd_vma reloc_offset;
2075 outrel.r_offset = offset;
2076 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2077 outrel.r_addend = addend;
2079 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2080 BFD_ASSERT (reloc_offset < sreloc->size);
2081 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2082 sreloc->contents + reloc_offset);
2083 sreloc->reloc_count++;
2085 /* If the entry's index is zero, this relocation was probably to a
2086 linkonce section that got discarded. We reserved a dynamic
2087 relocation, but it was for another entry than the one we got at
2088 the time of emitting the relocation. Unfortunately there's no
2089 simple way for us to catch this situation, since the relocation
2090 is cleared right before calling relocate_section, at which point
2091 we no longer know what the relocation used to point to. */
2094 BFD_ASSERT (entry->dynrelocs > 0);
2098 return reloc_offset;
2101 /* Add a fixup to the ROFIXUP section. */
2104 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2105 struct bfinfdpic_relocs_info *entry)
2107 bfd_vma fixup_offset;
2109 if (rofixup->flags & SEC_EXCLUDE)
2112 fixup_offset = rofixup->reloc_count * 4;
2113 if (rofixup->contents)
2115 BFD_ASSERT (fixup_offset < rofixup->size);
2116 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2118 rofixup->reloc_count++;
2120 if (entry && entry->symndx)
2122 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2124 BFD_ASSERT (entry->fixups > 0);
2128 return fixup_offset;
2131 /* Find the segment number in which OSEC, and output section, is
2135 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2137 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2139 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2142 inline static bfd_boolean
2143 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2145 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2147 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2150 /* Generate relocations for GOT entries, function descriptors, and
2151 code for PLT and lazy PLT entries. */
2153 inline static bfd_boolean
2154 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2156 struct bfd_link_info *info,
2158 Elf_Internal_Sym *sym,
2161 bfd_vma fd_lazy_rel_offset = (bfd_vma) -1;
2168 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2170 /* If the symbol is dynamic, consider it for dynamic
2171 relocations, otherwise decay to section + offset. */
2172 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2173 dynindx = entry->d.h->dynindx;
2177 && sec->output_section
2178 && ! bfd_is_abs_section (sec->output_section)
2179 && ! bfd_is_und_section (sec->output_section))
2180 dynindx = elf_section_data (sec->output_section)->dynindx;
2186 /* Generate relocation for GOT entry pointing to the symbol. */
2187 if (entry->got_entry)
2190 bfd_vma ad = addend;
2192 /* If the symbol is dynamic but binds locally, use
2194 if (sec && (entry->symndx != -1
2195 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2197 if (entry->symndx == -1)
2198 ad += entry->d.h->root.u.def.value;
2200 ad += sym->st_value;
2201 ad += sec->output_offset;
2202 if (sec->output_section && elf_section_data (sec->output_section))
2203 idx = elf_section_data (sec->output_section)->dynindx;
2208 /* If we're linking an executable at a fixed address, we can
2209 omit the dynamic relocation as long as the symbol is local to
2211 if (info->executable && !info->pie
2212 && (entry->symndx != -1
2213 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2216 ad += sec->output_section->vma;
2217 if (entry->symndx != -1
2218 || entry->d.h->root.type != bfd_link_hash_undefweak)
2219 _bfinfdpic_add_rofixup (output_bfd,
2220 bfinfdpic_gotfixup_section (info),
2221 bfinfdpic_got_section (info)->output_section
2223 + bfinfdpic_got_section (info)->output_offset
2224 + bfinfdpic_got_initial_offset (info)
2225 + entry->got_entry, entry);
2228 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2229 _bfd_elf_section_offset
2231 bfinfdpic_got_section (info),
2232 bfinfdpic_got_initial_offset (info)
2234 + bfinfdpic_got_section (info)
2235 ->output_section->vma
2236 + bfinfdpic_got_section (info)->output_offset,
2237 R_BFIN_BYTE4_DATA, idx, ad, entry);
2239 bfd_put_32 (output_bfd, ad,
2240 bfinfdpic_got_section (info)->contents
2241 + bfinfdpic_got_initial_offset (info)
2242 + entry->got_entry);
2245 /* Generate relocation for GOT entry pointing to a canonical
2246 function descriptor. */
2247 if (entry->fdgot_entry)
2252 if (! (entry->symndx == -1
2253 && entry->d.h->root.type == bfd_link_hash_undefweak
2254 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2256 /* If the symbol is dynamic and there may be dynamic symbol
2257 resolution because we are, or are linked with, a shared
2258 library, emit a FUNCDESC relocation such that the dynamic
2259 linker will allocate the function descriptor. If the
2260 symbol needs a non-local function descriptor but binds
2261 locally (e.g., its visibility is protected, emit a
2262 dynamic relocation decayed to section+offset. */
2263 if (entry->symndx == -1
2264 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2265 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2266 && !(info->executable && !info->pie))
2268 reloc = R_BFIN_FUNCDESC;
2269 idx = elf_section_data (entry->d.h->root.u.def.section
2270 ->output_section)->dynindx;
2271 ad = entry->d.h->root.u.def.section->output_offset
2272 + entry->d.h->root.u.def.value;
2274 else if (entry->symndx == -1
2275 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2277 reloc = R_BFIN_FUNCDESC;
2285 /* Otherwise, we know we have a private function descriptor,
2286 so reference it directly. */
2287 if (elf_hash_table (info)->dynamic_sections_created)
2288 BFD_ASSERT (entry->privfd);
2289 reloc = R_BFIN_BYTE4_DATA;
2290 idx = elf_section_data (bfinfdpic_got_section (info)
2291 ->output_section)->dynindx;
2292 ad = bfinfdpic_got_section (info)->output_offset
2293 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2296 /* If there is room for dynamic symbol resolution, emit the
2297 dynamic relocation. However, if we're linking an
2298 executable at a fixed location, we won't have emitted a
2299 dynamic symbol entry for the got section, so idx will be
2300 zero, which means we can and should compute the address
2301 of the private descriptor ourselves. */
2302 if (info->executable && !info->pie
2303 && (entry->symndx != -1
2304 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2306 ad += bfinfdpic_got_section (info)->output_section->vma;
2307 _bfinfdpic_add_rofixup (output_bfd,
2308 bfinfdpic_gotfixup_section (info),
2309 bfinfdpic_got_section (info)
2310 ->output_section->vma
2311 + bfinfdpic_got_section (info)
2313 + bfinfdpic_got_initial_offset (info)
2314 + entry->fdgot_entry, entry);
2317 _bfinfdpic_add_dyn_reloc (output_bfd,
2318 bfinfdpic_gotrel_section (info),
2319 _bfd_elf_section_offset
2321 bfinfdpic_got_section (info),
2322 bfinfdpic_got_initial_offset (info)
2323 + entry->fdgot_entry)
2324 + bfinfdpic_got_section (info)
2325 ->output_section->vma
2326 + bfinfdpic_got_section (info)
2328 reloc, idx, ad, entry);
2331 bfd_put_32 (output_bfd, ad,
2332 bfinfdpic_got_section (info)->contents
2333 + bfinfdpic_got_initial_offset (info)
2334 + entry->fdgot_entry);
2337 /* Generate relocation to fill in a private function descriptor in
2339 if (entry->fd_entry)
2342 bfd_vma ad = addend;
2344 long lowword, highword;
2346 /* If the symbol is dynamic but binds locally, use
2348 if (sec && (entry->symndx != -1
2349 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2351 if (entry->symndx == -1)
2352 ad += entry->d.h->root.u.def.value;
2354 ad += sym->st_value;
2355 ad += sec->output_offset;
2356 if (sec->output_section && elf_section_data (sec->output_section))
2357 idx = elf_section_data (sec->output_section)->dynindx;
2362 /* If we're linking an executable at a fixed address, we can
2363 omit the dynamic relocation as long as the symbol is local to
2365 if (info->executable && !info->pie
2366 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2369 ad += sec->output_section->vma;
2371 if (entry->symndx != -1
2372 || entry->d.h->root.type != bfd_link_hash_undefweak)
2374 _bfinfdpic_add_rofixup (output_bfd,
2375 bfinfdpic_gotfixup_section (info),
2376 bfinfdpic_got_section (info)
2377 ->output_section->vma
2378 + bfinfdpic_got_section (info)
2380 + bfinfdpic_got_initial_offset (info)
2381 + entry->fd_entry, entry);
2382 _bfinfdpic_add_rofixup (output_bfd,
2383 bfinfdpic_gotfixup_section (info),
2384 bfinfdpic_got_section (info)
2385 ->output_section->vma
2386 + bfinfdpic_got_section (info)
2388 + bfinfdpic_got_initial_offset (info)
2389 + entry->fd_entry + 4, entry);
2395 = _bfinfdpic_add_dyn_reloc (output_bfd,
2397 ? bfinfdpic_pltrel_section (info)
2398 : bfinfdpic_gotrel_section (info),
2399 _bfd_elf_section_offset
2401 bfinfdpic_got_section (info),
2402 bfinfdpic_got_initial_offset (info)
2404 + bfinfdpic_got_section (info)
2405 ->output_section->vma
2406 + bfinfdpic_got_section (info)
2408 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2411 /* If we've omitted the dynamic relocation, just emit the fixed
2412 addresses of the symbol and of the local GOT base offset. */
2413 if (info->executable && !info->pie && sec && sec->output_section)
2416 highword = bfinfdpic_got_section (info)->output_section->vma
2417 + bfinfdpic_got_section (info)->output_offset
2418 + bfinfdpic_got_initial_offset (info);
2420 else if (entry->lazyplt)
2425 fd_lazy_rel_offset = ofst;
2427 /* A function descriptor used for lazy or local resolving is
2428 initialized such that its high word contains the output
2429 section index in which the PLT entries are located, and
2430 the low word contains the address of the lazy PLT entry
2431 entry point, that must be within the memory region
2432 assigned to that section. */
2433 lowword = entry->lzplt_entry + 4
2434 + bfinfdpic_plt_section (info)->output_offset
2435 + bfinfdpic_plt_section (info)->output_section->vma;
2436 highword = _bfinfdpic_osec_to_segment
2437 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2441 /* A function descriptor for a local function gets the index
2442 of the section. For a non-local function, it's
2446 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2447 && entry->d.h->dynindx == idx))
2450 highword = _bfinfdpic_osec_to_segment
2451 (output_bfd, sec->output_section);
2454 bfd_put_32 (output_bfd, lowword,
2455 bfinfdpic_got_section (info)->contents
2456 + bfinfdpic_got_initial_offset (info)
2458 bfd_put_32 (output_bfd, highword,
2459 bfinfdpic_got_section (info)->contents
2460 + bfinfdpic_got_initial_offset (info)
2461 + entry->fd_entry + 4);
2464 /* Generate code for the PLT entry. */
2465 if (entry->plt_entry != (bfd_vma) -1)
2467 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2470 BFD_ASSERT (entry->fd_entry);
2472 /* Figure out what kind of PLT entry we need, depending on the
2473 location of the function descriptor within the GOT. */
2474 if (entry->fd_entry >= -(1 << (18 - 1))
2475 && entry->fd_entry + 4 < (1 << (18 - 1)))
2477 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2478 bfd_put_32 (output_bfd,
2479 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2481 bfd_put_32 (output_bfd,
2482 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2488 /* P1.L = fd_entry; P1.H = fd_entry;
2492 bfd_put_32 (output_bfd,
2493 0xe109 | (entry->fd_entry << 16),
2495 bfd_put_32 (output_bfd,
2496 0xe149 | (entry->fd_entry & 0xFFFF0000),
2498 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2499 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2500 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2504 bfd_put_16 (output_bfd, 0x0051, plt_code);
2507 /* Generate code for the lazy PLT entry. */
2508 if (entry->lzplt_entry != (bfd_vma) -1)
2510 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2511 + entry->lzplt_entry;
2512 bfd_vma resolverStub_addr;
2514 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2517 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2518 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2519 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2520 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2522 if (entry->lzplt_entry == resolverStub_addr)
2524 /* This is a lazy PLT entry that includes a resolver call.
2528 bfd_put_32 (output_bfd,
2531 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2535 /* JUMP.S resolverStub */
2536 bfd_put_16 (output_bfd,
2538 | (((resolverStub_addr - entry->lzplt_entry)
2539 / 2) & (((bfd_vma)1 << 12) - 1)),
2547 /* Relocate an Blackfin ELF section.
2549 The RELOCATE_SECTION function is called by the new ELF backend linker
2550 to handle the relocations for a section.
2552 The relocs are always passed as Rela structures; if the section
2553 actually uses Rel structures, the r_addend field will always be
2556 This function is responsible for adjusting the section contents as
2557 necessary, and (if using Rela relocs and generating a relocatable
2558 output file) adjusting the reloc addend as necessary.
2560 This function does not have to worry about setting the reloc
2561 address or the reloc symbol index.
2563 LOCAL_SYMS is a pointer to the swapped in local symbols.
2565 LOCAL_SECTIONS is an array giving the section in the input file
2566 corresponding to the st_shndx field of each local symbol.
2568 The global hash table entry for the global symbols can be found
2569 via elf_sym_hashes (input_bfd).
2571 When generating relocatable output, this function must handle
2572 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2573 going to be the section symbol corresponding to the output
2574 section, which means that the addend must be adjusted
2578 bfinfdpic_relocate_section (bfd * output_bfd,
2579 struct bfd_link_info *info,
2581 asection * input_section,
2582 bfd_byte * contents,
2583 Elf_Internal_Rela * relocs,
2584 Elf_Internal_Sym * local_syms,
2585 asection ** local_sections)
2587 Elf_Internal_Shdr *symtab_hdr;
2588 struct elf_link_hash_entry **sym_hashes;
2589 Elf_Internal_Rela *rel;
2590 Elf_Internal_Rela *relend;
2591 unsigned isec_segment, got_segment, plt_segment,
2593 int silence_segment_error = !(info->shared || info->pie);
2595 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2596 sym_hashes = elf_sym_hashes (input_bfd);
2597 relend = relocs + input_section->reloc_count;
2599 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2600 input_section->output_section);
2601 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2602 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2603 bfinfdpic_got_section (info)
2607 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2608 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2609 bfinfdpic_plt_section (info)
2614 for (rel = relocs; rel < relend; rel ++)
2616 reloc_howto_type *howto;
2617 unsigned long r_symndx;
2618 Elf_Internal_Sym *sym;
2620 struct elf_link_hash_entry *h;
2622 bfd_reloc_status_type r;
2623 const char * name = NULL;
2626 struct bfinfdpic_relocs_info *picrel;
2627 bfd_vma orig_addend = rel->r_addend;
2629 r_type = ELF32_R_TYPE (rel->r_info);
2631 if (r_type == R_BFIN_GNU_VTINHERIT
2632 || r_type == R_BFIN_GNU_VTENTRY)
2635 r_symndx = ELF32_R_SYM (rel->r_info);
2636 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2639 bfd_set_error (bfd_error_bad_value);
2647 if (r_symndx < symtab_hdr->sh_info)
2649 sym = local_syms + r_symndx;
2650 osec = sec = local_sections [r_symndx];
2651 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2653 name = bfd_elf_string_from_elf_section
2654 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2655 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2660 bfd_boolean unresolved_reloc;
2662 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2663 r_symndx, symtab_hdr, sym_hashes,
2665 unresolved_reloc, warned);
2669 if (sec != NULL && discarded_section (sec))
2670 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2671 rel, 1, relend, howto, 0, contents);
2673 if (info->relocatable)
2677 && (h->root.type == bfd_link_hash_defined
2678 || h->root.type == bfd_link_hash_defweak)
2679 && !BFINFDPIC_SYM_LOCAL (info, h))
2687 case R_BFIN_PCREL24:
2688 case R_BFIN_PCREL24_JUMP_L:
2689 case R_BFIN_BYTE4_DATA:
2690 if (! IS_FDPIC (output_bfd))
2693 case R_BFIN_GOT17M4:
2696 case R_BFIN_FUNCDESC_GOT17M4:
2697 case R_BFIN_FUNCDESC_GOTHI:
2698 case R_BFIN_FUNCDESC_GOTLO:
2699 case R_BFIN_GOTOFF17M4:
2700 case R_BFIN_GOTOFFHI:
2701 case R_BFIN_GOTOFFLO:
2702 case R_BFIN_FUNCDESC_GOTOFF17M4:
2703 case R_BFIN_FUNCDESC_GOTOFFHI:
2704 case R_BFIN_FUNCDESC_GOTOFFLO:
2705 case R_BFIN_FUNCDESC:
2706 case R_BFIN_FUNCDESC_VALUE:
2708 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2709 (info), input_bfd, h,
2710 orig_addend, INSERT);
2712 /* In order to find the entry we created before, we must
2713 use the original addend, not the one that may have been
2714 modified by _bfd_elf_rela_local_sym(). */
2715 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2716 (info), input_bfd, r_symndx,
2717 orig_addend, INSERT);
2721 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2725 (*_bfd_error_handler)
2726 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2727 input_bfd, input_section, rel->r_offset, name);
2737 if (h && ! BFINFDPIC_SYM_LOCAL (info, h)
2738 && _bfd_elf_section_offset (output_bfd, info, input_section,
2739 rel->r_offset) != (bfd_vma) -1)
2741 info->callbacks->warning
2742 (info, _("relocation references symbol not defined in the module"),
2743 name, input_bfd, input_section, rel->r_offset);
2751 case R_BFIN_PCREL24:
2752 case R_BFIN_PCREL24_JUMP_L:
2753 check_segment[0] = isec_segment;
2754 if (! IS_FDPIC (output_bfd))
2755 check_segment[1] = isec_segment;
2756 else if (picrel->plt)
2758 relocation = bfinfdpic_plt_section (info)->output_section->vma
2759 + bfinfdpic_plt_section (info)->output_offset
2760 + picrel->plt_entry;
2761 check_segment[1] = plt_segment;
2763 /* We don't want to warn on calls to undefined weak symbols,
2764 as calls to them must be protected by non-NULL tests
2765 anyway, and unprotected calls would invoke undefined
2767 else if (picrel->symndx == -1
2768 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2769 check_segment[1] = check_segment[0];
2771 check_segment[1] = sec
2772 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2776 case R_BFIN_GOT17M4:
2779 relocation = picrel->got_entry;
2780 check_segment[0] = check_segment[1] = got_segment;
2783 case R_BFIN_FUNCDESC_GOT17M4:
2784 case R_BFIN_FUNCDESC_GOTHI:
2785 case R_BFIN_FUNCDESC_GOTLO:
2786 relocation = picrel->fdgot_entry;
2787 check_segment[0] = check_segment[1] = got_segment;
2790 case R_BFIN_GOTOFFHI:
2791 case R_BFIN_GOTOFF17M4:
2792 case R_BFIN_GOTOFFLO:
2793 relocation -= bfinfdpic_got_section (info)->output_section->vma
2794 + bfinfdpic_got_section (info)->output_offset
2795 + bfinfdpic_got_initial_offset (info);
2796 check_segment[0] = got_segment;
2797 check_segment[1] = sec
2798 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2802 case R_BFIN_FUNCDESC_GOTOFF17M4:
2803 case R_BFIN_FUNCDESC_GOTOFFHI:
2804 case R_BFIN_FUNCDESC_GOTOFFLO:
2805 relocation = picrel->fd_entry;
2806 check_segment[0] = check_segment[1] = got_segment;
2809 case R_BFIN_FUNCDESC:
2812 bfd_vma addend = rel->r_addend;
2814 if (! (h && h->root.type == bfd_link_hash_undefweak
2815 && BFINFDPIC_SYM_LOCAL (info, h)))
2817 /* If the symbol is dynamic and there may be dynamic
2818 symbol resolution because we are or are linked with a
2819 shared library, emit a FUNCDESC relocation such that
2820 the dynamic linker will allocate the function
2821 descriptor. If the symbol needs a non-local function
2822 descriptor but binds locally (e.g., its visibility is
2823 protected, emit a dynamic relocation decayed to
2825 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2826 && BFINFDPIC_SYM_LOCAL (info, h)
2827 && !(info->executable && !info->pie))
2829 dynindx = elf_section_data (h->root.u.def.section
2830 ->output_section)->dynindx;
2831 addend += h->root.u.def.section->output_offset
2832 + h->root.u.def.value;
2834 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2838 info->callbacks->warning
2839 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2840 name, input_bfd, input_section, rel->r_offset);
2843 dynindx = h->dynindx;
2847 /* Otherwise, we know we have a private function
2848 descriptor, so reference it directly. */
2849 BFD_ASSERT (picrel->privfd);
2850 r_type = R_BFIN_BYTE4_DATA;
2851 dynindx = elf_section_data (bfinfdpic_got_section (info)
2852 ->output_section)->dynindx;
2853 addend = bfinfdpic_got_section (info)->output_offset
2854 + bfinfdpic_got_initial_offset (info)
2858 /* If there is room for dynamic symbol resolution, emit
2859 the dynamic relocation. However, if we're linking an
2860 executable at a fixed location, we won't have emitted a
2861 dynamic symbol entry for the got section, so idx will
2862 be zero, which means we can and should compute the
2863 address of the private descriptor ourselves. */
2864 if (info->executable && !info->pie
2865 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2869 addend += bfinfdpic_got_section (info)->output_section->vma;
2870 if ((bfd_get_section_flags (output_bfd,
2871 input_section->output_section)
2872 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2874 if (_bfinfdpic_osec_readonly_p (output_bfd,
2878 info->callbacks->warning
2880 _("cannot emit fixups in read-only section"),
2881 name, input_bfd, input_section, rel->r_offset);
2885 offset = _bfd_elf_section_offset
2887 input_section, rel->r_offset);
2889 if (offset != (bfd_vma)-1)
2890 _bfinfdpic_add_rofixup (output_bfd,
2891 bfinfdpic_gotfixup_section
2893 offset + input_section
2894 ->output_section->vma
2895 + input_section->output_offset,
2899 else if ((bfd_get_section_flags (output_bfd,
2900 input_section->output_section)
2901 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2905 if (_bfinfdpic_osec_readonly_p (output_bfd,
2909 info->callbacks->warning
2911 _("cannot emit dynamic relocations in read-only section"),
2912 name, input_bfd, input_section, rel->r_offset);
2915 offset = _bfd_elf_section_offset (output_bfd, info,
2916 input_section, rel->r_offset);
2918 if (offset != (bfd_vma)-1)
2919 _bfinfdpic_add_dyn_reloc (output_bfd,
2920 bfinfdpic_gotrel_section (info),
2921 offset + input_section
2922 ->output_section->vma
2923 + input_section->output_offset,
2925 dynindx, addend, picrel);
2928 addend += bfinfdpic_got_section (info)->output_section->vma;
2931 /* We want the addend in-place because dynamic
2932 relocations are REL. Setting relocation to it should
2933 arrange for it to be installed. */
2934 relocation = addend - rel->r_addend;
2936 check_segment[0] = check_segment[1] = got_segment;
2939 case R_BFIN_BYTE4_DATA:
2940 if (! IS_FDPIC (output_bfd))
2942 check_segment[0] = check_segment[1] = -1;
2946 case R_BFIN_FUNCDESC_VALUE:
2949 bfd_vma addend = rel->r_addend;
2951 offset = _bfd_elf_section_offset (output_bfd, info,
2952 input_section, rel->r_offset);
2954 /* If the symbol is dynamic but binds locally, use
2956 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2958 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2960 info->callbacks->warning
2961 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2962 name, input_bfd, input_section, rel->r_offset);
2965 dynindx = h->dynindx;
2970 addend += h->root.u.def.value;
2972 addend += sym->st_value;
2974 addend += osec->output_offset;
2975 if (osec && osec->output_section
2976 && ! bfd_is_abs_section (osec->output_section)
2977 && ! bfd_is_und_section (osec->output_section))
2978 dynindx = elf_section_data (osec->output_section)->dynindx;
2983 /* If we're linking an executable at a fixed address, we
2984 can omit the dynamic relocation as long as the symbol
2985 is defined in the current link unit (which is implied
2986 by its output section not being NULL). */
2987 if (info->executable && !info->pie
2988 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2991 addend += osec->output_section->vma;
2992 if (IS_FDPIC (input_bfd)
2993 && (bfd_get_section_flags (output_bfd,
2994 input_section->output_section)
2995 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2997 if (_bfinfdpic_osec_readonly_p (output_bfd,
3001 info->callbacks->warning
3003 _("cannot emit fixups in read-only section"),
3004 name, input_bfd, input_section, rel->r_offset);
3007 if (!h || h->root.type != bfd_link_hash_undefweak)
3009 if (offset != (bfd_vma)-1)
3011 _bfinfdpic_add_rofixup (output_bfd,
3012 bfinfdpic_gotfixup_section
3014 offset + input_section
3015 ->output_section->vma
3016 + input_section->output_offset,
3019 if (r_type == R_BFIN_FUNCDESC_VALUE)
3020 _bfinfdpic_add_rofixup
3022 bfinfdpic_gotfixup_section (info),
3023 offset + input_section->output_section->vma
3024 + input_section->output_offset + 4, picrel);
3031 if ((bfd_get_section_flags (output_bfd,
3032 input_section->output_section)
3033 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3035 if (_bfinfdpic_osec_readonly_p (output_bfd,
3039 info->callbacks->warning
3041 _("cannot emit dynamic relocations in read-only section"),
3042 name, input_bfd, input_section, rel->r_offset);
3046 if (offset != (bfd_vma)-1)
3047 _bfinfdpic_add_dyn_reloc (output_bfd,
3048 bfinfdpic_gotrel_section (info),
3050 + input_section->output_section->vma
3051 + input_section->output_offset,
3052 r_type, dynindx, addend, picrel);
3055 addend += osec->output_section->vma;
3056 /* We want the addend in-place because dynamic
3057 relocations are REL. Setting relocation to it
3058 should arrange for it to be installed. */
3059 relocation = addend - rel->r_addend;
3062 if (r_type == R_BFIN_FUNCDESC_VALUE)
3064 /* If we've omitted the dynamic relocation, just emit
3065 the fixed addresses of the symbol and of the local
3067 if (info->executable && !info->pie
3068 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3069 bfd_put_32 (output_bfd,
3070 bfinfdpic_got_section (info)->output_section->vma
3071 + bfinfdpic_got_section (info)->output_offset
3072 + bfinfdpic_got_initial_offset (info),
3073 contents + rel->r_offset + 4);
3075 /* A function descriptor used for lazy or local
3076 resolving is initialized such that its high word
3077 contains the output section index in which the
3078 PLT entries are located, and the low word
3079 contains the offset of the lazy PLT entry entry
3080 point into that section. */
3081 bfd_put_32 (output_bfd,
3082 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3084 : _bfinfdpic_osec_to_segment (output_bfd,
3087 contents + rel->r_offset + 4);
3090 check_segment[0] = check_segment[1] = got_segment;
3094 check_segment[0] = isec_segment;
3095 check_segment[1] = sec
3096 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3101 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3103 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3104 in the ld testsuite. */
3105 /* This helps catch problems in GCC while we can't do more
3106 than static linking. The idea is to test whether the
3107 input file basename is crt0.o only once. */
3108 if (silence_segment_error == 1)
3109 silence_segment_error =
3110 (strlen (input_bfd->filename) == 6
3111 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3112 || (strlen (input_bfd->filename) > 6
3113 && filename_cmp (input_bfd->filename
3114 + strlen (input_bfd->filename) - 7,
3118 if (!silence_segment_error
3119 /* We don't want duplicate errors for undefined
3121 && !(picrel && picrel->symndx == -1
3122 && picrel->d.h->root.type == bfd_link_hash_undefined))
3123 info->callbacks->warning
3125 (info->shared || info->pie)
3126 ? _("relocations between different segments are not supported")
3127 : _("warning: relocation references a different segment"),
3128 name, input_bfd, input_section, rel->r_offset);
3129 if (!silence_segment_error && (info->shared || info->pie))
3131 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3136 case R_BFIN_GOTOFFHI:
3137 /* We need the addend to be applied before we shift the
3139 relocation += rel->r_addend;
3142 case R_BFIN_FUNCDESC_GOTHI:
3143 case R_BFIN_FUNCDESC_GOTOFFHI:
3148 case R_BFIN_FUNCDESC_GOTLO:
3149 case R_BFIN_GOTOFFLO:
3150 case R_BFIN_FUNCDESC_GOTOFFLO:
3151 relocation &= 0xffff;
3160 case R_BFIN_PCREL24:
3161 case R_BFIN_PCREL24_JUMP_L:
3162 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3166 /* When referencing a GOT entry, a function descriptor or a
3167 PLT, we don't want the addend to apply to the reference,
3168 but rather to the referenced symbol. The actual entry
3169 will have already been created taking the addend into
3170 account, so cancel it out here. */
3171 case R_BFIN_GOT17M4:
3174 case R_BFIN_FUNCDESC_GOT17M4:
3175 case R_BFIN_FUNCDESC_GOTHI:
3176 case R_BFIN_FUNCDESC_GOTLO:
3177 case R_BFIN_FUNCDESC_GOTOFF17M4:
3178 case R_BFIN_FUNCDESC_GOTOFFHI:
3179 case R_BFIN_FUNCDESC_GOTOFFLO:
3180 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3181 here, since we do want to apply the addend to the others.
3182 Note that we've applied the addend to GOTOFFHI before we
3183 shifted it right. */
3184 case R_BFIN_GOTOFFHI:
3185 relocation -= rel->r_addend;
3192 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3193 contents, rel->r_offset,
3194 relocation, rel->r_addend);
3196 if (r != bfd_reloc_ok)
3198 const char * msg = (const char *) NULL;
3202 case bfd_reloc_overflow:
3203 r = info->callbacks->reloc_overflow
3204 (info, (h ? &h->root : NULL), name, howto->name,
3205 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3208 case bfd_reloc_undefined:
3209 r = info->callbacks->undefined_symbol
3210 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3213 case bfd_reloc_outofrange:
3214 msg = _("internal error: out of range error");
3217 case bfd_reloc_notsupported:
3218 msg = _("internal error: unsupported relocation error");
3221 case bfd_reloc_dangerous:
3222 msg = _("internal error: dangerous relocation");
3226 msg = _("internal error: unknown error");
3231 r = info->callbacks->warning
3232 (info, msg, name, input_bfd, input_section, rel->r_offset);
3242 /* Update the relocation information for the relocations of the section
3246 bfinfdpic_gc_sweep_hook (bfd *abfd,
3247 struct bfd_link_info *info,
3249 const Elf_Internal_Rela *relocs)
3251 Elf_Internal_Shdr *symtab_hdr;
3252 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3253 const Elf_Internal_Rela *rel;
3254 const Elf_Internal_Rela *rel_end;
3255 struct bfinfdpic_relocs_info *picrel;
3257 BFD_ASSERT (IS_FDPIC (abfd));
3259 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3260 sym_hashes = elf_sym_hashes (abfd);
3261 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3262 if (!elf_bad_symtab (abfd))
3263 sym_hashes_end -= symtab_hdr->sh_info;
3265 rel_end = relocs + sec->reloc_count;
3266 for (rel = relocs; rel < rel_end; rel++)
3268 struct elf_link_hash_entry *h;
3269 unsigned long r_symndx;
3271 r_symndx = ELF32_R_SYM (rel->r_info);
3272 if (r_symndx < symtab_hdr->sh_info)
3275 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3278 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3280 rel->r_addend, NO_INSERT);
3282 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3283 (info), abfd, r_symndx,
3284 rel->r_addend, NO_INSERT);
3289 switch (ELF32_R_TYPE (rel->r_info))
3291 case R_BFIN_PCREL24:
3292 case R_BFIN_PCREL24_JUMP_L:
3296 case R_BFIN_FUNCDESC_VALUE:
3297 picrel->relocsfdv--;
3298 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3302 case R_BFIN_BYTE4_DATA:
3304 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3308 case R_BFIN_GOT17M4:
3317 case R_BFIN_FUNCDESC_GOT17M4:
3318 picrel->fdgot17m4--;
3321 case R_BFIN_FUNCDESC_GOTHI:
3322 case R_BFIN_FUNCDESC_GOTLO:
3323 picrel->fdgothilo--;
3326 case R_BFIN_GOTOFF17M4:
3327 case R_BFIN_GOTOFFHI:
3328 case R_BFIN_GOTOFFLO:
3332 case R_BFIN_FUNCDESC_GOTOFF17M4:
3333 picrel->fdgoff17m4--;
3336 case R_BFIN_FUNCDESC_GOTOFFHI:
3337 case R_BFIN_FUNCDESC_GOTOFFLO:
3338 picrel->fdgoffhilo--;
3341 case R_BFIN_FUNCDESC:
3354 /* We need dynamic symbols for every section, since segments can
3355 relocate independently. */
3357 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3358 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3361 switch (elf_section_data (p)->this_hdr.sh_type)
3365 /* If sh_type is yet undecided, assume it could be
3366 SHT_PROGBITS/SHT_NOBITS. */
3370 /* There shouldn't be section relative relocations
3371 against any other section. */
3377 /* Create a .got section, as well as its additional info field. This
3378 is almost entirely copied from
3379 elflink.c:_bfd_elf_create_got_section(). */
3382 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3384 flagword flags, pltflags;
3386 struct elf_link_hash_entry *h;
3387 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3390 /* This function may be called more than once. */
3391 s = bfd_get_linker_section (abfd, ".got");
3395 /* Machine specific: although pointers are 32-bits wide, we want the
3396 GOT to be aligned to a 64-bit boundary, such that function
3397 descriptors in it can be accessed with 64-bit loads and
3401 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3402 | SEC_LINKER_CREATED);
3405 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
3407 || !bfd_set_section_alignment (abfd, s, ptralign))
3410 if (bed->want_got_plt)
3412 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
3414 || !bfd_set_section_alignment (abfd, s, ptralign))
3418 if (bed->want_got_sym)
3420 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3421 (or .got.plt) section. We don't do this in the linker script
3422 because we don't want to define the symbol if we are not creating
3423 a global offset table. */
3424 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3425 elf_hash_table (info)->hgot = h;
3429 /* Machine-specific: we want the symbol for executables as
3431 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3435 /* The first bit of the global offset table is the header. */
3436 s->size += bed->got_header_size;
3438 /* This is the machine-specific part. Create and initialize section
3439 data for the got. */
3440 if (IS_FDPIC (abfd))
3442 bfinfdpic_got_section (info) = s;
3443 bfinfdpic_relocs_info (info) = htab_try_create (1,
3444 bfinfdpic_relocs_info_hash,
3445 bfinfdpic_relocs_info_eq,
3447 if (! bfinfdpic_relocs_info (info))
3450 s = bfd_make_section_anyway_with_flags (abfd, ".rel.got",
3451 (flags | SEC_READONLY));
3453 || ! bfd_set_section_alignment (abfd, s, 2))
3456 bfinfdpic_gotrel_section (info) = s;
3458 /* Machine-specific. */
3459 s = bfd_make_section_anyway_with_flags (abfd, ".rofixup",
3460 (flags | SEC_READONLY));
3462 || ! bfd_set_section_alignment (abfd, s, 2))
3465 bfinfdpic_gotfixup_section (info) = s;
3468 pltflags |= SEC_CODE;
3469 if (bed->plt_not_loaded)
3470 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3471 if (bed->plt_readonly)
3472 pltflags |= SEC_READONLY;
3474 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
3476 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3478 /* Blackfin-specific: remember it. */
3479 bfinfdpic_plt_section (info) = s;
3481 if (bed->want_plt_sym)
3483 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3485 struct bfd_link_hash_entry *bh = NULL;
3487 if (! (_bfd_generic_link_add_one_symbol
3488 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3489 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3491 h = (struct elf_link_hash_entry *) bh;
3493 h->type = STT_OBJECT;
3495 if (! info->executable
3496 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3500 /* Blackfin-specific: we want rel relocations for the plt. */
3501 s = bfd_make_section_anyway_with_flags (abfd, ".rel.plt",
3502 flags | SEC_READONLY);
3504 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3506 /* Blackfin-specific: remember it. */
3507 bfinfdpic_pltrel_section (info) = s;
3512 /* Make sure the got and plt sections exist, and that our pointers in
3513 the link hash table point to them. */
3516 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3518 /* This is mostly copied from
3519 elflink.c:_bfd_elf_create_dynamic_sections(). */
3522 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3524 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3525 | SEC_LINKER_CREATED);
3527 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3528 .rel[a].bss sections. */
3530 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3531 if (! _bfin_create_got_section (abfd, info))
3534 /* Blackfin-specific: make sure we created everything we wanted. */
3535 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3536 /* && bfinfdpic_gotfixup_section (info) */
3537 && bfinfdpic_plt_section (info)
3538 && bfinfdpic_pltrel_section (info));
3540 if (bed->want_dynbss)
3542 /* The .dynbss section is a place to put symbols which are defined
3543 by dynamic objects, are referenced by regular objects, and are
3544 not functions. We must allocate space for them in the process
3545 image and use a R_*_COPY reloc to tell the dynamic linker to
3546 initialize them at run time. The linker script puts the .dynbss
3547 section into the .bss section of the final image. */
3548 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
3549 SEC_ALLOC | SEC_LINKER_CREATED);
3553 /* The .rel[a].bss section holds copy relocs. This section is not
3554 normally needed. We need to create it here, though, so that the
3555 linker will map it to an output section. We can't just create it
3556 only if we need it, because we will not know whether we need it
3557 until we have seen all the input files, and the first time the
3558 main linker code calls BFD after examining all the input files
3559 (size_dynamic_sections) the input sections have already been
3560 mapped to the output sections. If the section turns out not to
3561 be needed, we can discard it later. We will never need this
3562 section when generating a shared object, since they do not use
3566 s = bfd_make_section_anyway_with_flags (abfd,
3568 flags | SEC_READONLY);
3570 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3578 /* Compute the total GOT size required by each symbol in each range.
3579 Symbols may require up to 4 words in the GOT: an entry pointing to
3580 the symbol, an entry pointing to its function descriptor, and a
3581 private function descriptors taking two words. */
3584 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3585 struct _bfinfdpic_dynamic_got_info *dinfo)
3587 /* Allocate space for a GOT entry pointing to the symbol. */
3589 dinfo->got17m4 += 4;
3590 else if (entry->gothilo)
3591 dinfo->gothilo += 4;
3596 /* Allocate space for a GOT entry pointing to the function
3598 if (entry->fdgot17m4)
3599 dinfo->got17m4 += 4;
3600 else if (entry->fdgothilo)
3601 dinfo->gothilo += 4;
3606 /* Decide whether we need a PLT entry, a function descriptor in the
3607 GOT, and a lazy PLT entry for this symbol. */
3608 entry->plt = entry->call
3609 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3610 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3611 entry->privfd = entry->plt
3612 || entry->fdgoff17m4 || entry->fdgoffhilo
3613 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3614 && (entry->symndx != -1
3615 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3616 entry->lazyplt = entry->privfd
3617 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3618 && ! (dinfo->info->flags & DF_BIND_NOW)
3619 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3621 /* Allocate space for a function descriptor. */
3622 if (entry->fdgoff17m4)
3624 else if (entry->privfd && entry->plt)
3626 else if (entry->privfd)
3633 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3636 /* Compute the number of dynamic relocations and fixups that a symbol
3637 requires, and add (or subtract) from the grand and per-symbol
3641 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3642 struct _bfinfdpic_dynamic_got_info *dinfo,
3643 bfd_boolean subtract)
3645 bfd_vma relocs = 0, fixups = 0;
3647 if (!dinfo->info->executable || dinfo->info->pie)
3648 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3651 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3653 if (entry->symndx != -1
3654 || entry->d.h->root.type != bfd_link_hash_undefweak)
3655 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3658 relocs += entry->relocs32 + entry->relocsfdv;
3660 if (entry->symndx != -1
3661 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3663 if (entry->symndx != -1
3664 || entry->d.h->root.type != bfd_link_hash_undefweak)
3665 fixups += entry->relocsfd;
3668 relocs += entry->relocsfd;
3677 entry->dynrelocs += relocs;
3678 entry->fixups += fixups;
3679 dinfo->relocs += relocs;
3680 dinfo->fixups += fixups;
3683 /* Compute the total GOT and PLT size required by each symbol in each range. *
3684 Symbols may require up to 4 words in the GOT: an entry pointing to
3685 the symbol, an entry pointing to its function descriptor, and a
3686 private function descriptors taking two words. */
3689 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3691 struct bfinfdpic_relocs_info *entry = *entryp;
3692 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3694 _bfinfdpic_count_nontls_entries (entry, dinfo);
3696 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3701 /* This structure is used to assign offsets to got entries, function
3702 descriptors, plt entries and lazy plt entries. */
3704 struct _bfinfdpic_dynamic_got_plt_info
3706 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3707 struct _bfinfdpic_dynamic_got_info g;
3709 /* For each addressable range, we record a MAX (positive) and MIN
3710 (negative) value. CUR is used to assign got entries, and it's
3711 incremented from an initial positive value to MAX, then from MIN
3712 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3713 assign function descriptors, and it's decreased from an initial
3714 non-positive value to MIN, then from MAX down to CUR (unless CUR
3715 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3716 to even words. ODD, if non-zero, indicates an odd word to be
3717 used for the next got entry, otherwise CUR is used and
3718 incremented by a pair of words, wrapping around when it reaches
3719 MAX. FDCUR is decremented (and wrapped) before the next function
3720 descriptor is chosen. FDPLT indicates the number of remaining
3721 slots that can be used for function descriptors used only by PLT
3723 struct _bfinfdpic_dynamic_got_alloc_data
3725 bfd_signed_vma max, cur, odd, fdcur, min;
3730 /* Determine the positive and negative ranges to be used by each
3731 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3732 double-word boundary, are the minimum (negative) and maximum
3733 (positive) GOT offsets already used by previous ranges, except for
3734 an ODD entry that may have been left behind. GOT and FD indicate
3735 the size of GOT entries and function descriptors that must be
3736 placed within the range from -WRAP to WRAP. If there's room left,
3737 up to FDPLT bytes should be reserved for additional function
3740 inline static bfd_signed_vma
3741 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3742 bfd_signed_vma fdcur,
3750 bfd_signed_vma wrapmin = -wrap;
3752 /* Start at the given initial points. */
3756 /* If we had an incoming odd word and we have any got entries that
3757 are going to use it, consume it, otherwise leave gad->odd at
3758 zero. We might force gad->odd to zero and return the incoming
3759 odd such that it is used by the next range, but then GOT entries
3760 might appear to be out of order and we wouldn't be able to
3761 shorten the GOT by one word if it turns out to end with an
3762 unpaired GOT entry. */
3772 /* If we're left with an unpaired GOT entry, compute its location
3773 such that we can return it. Otherwise, if got doesn't require an
3774 odd number of words here, either odd was already zero in the
3775 block above, or it was set to zero because got was non-zero, or
3776 got was already zero. In the latter case, we want the value of
3777 odd to carry over to the return statement, so we don't want to
3778 reset odd unless the condition below is true. */
3785 /* Compute the tentative boundaries of this range. */
3786 gad->max = cur + got;
3787 gad->min = fdcur - fd;
3790 /* If function descriptors took too much space, wrap some of them
3792 if (gad->min < wrapmin)
3794 gad->max += wrapmin - gad->min;
3797 /* If there is space left and we have function descriptors
3798 referenced in PLT entries that could take advantage of shorter
3799 offsets, place them here. */
3800 else if (fdplt && gad->min > wrapmin)
3803 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3804 fds = gad->min - wrapmin;
3813 /* If GOT entries took too much space, wrap some of them around.
3814 This may well cause gad->min to become lower than wrapmin. This
3815 will cause a relocation overflow later on, so we don't have to
3817 if ((bfd_vma) gad->max > wrap)
3819 gad->min -= gad->max - wrap;
3822 /* If there is more space left, try to place some more function
3823 descriptors for PLT entries. */
3824 else if (fdplt && (bfd_vma) gad->max < wrap)
3827 if ((bfd_vma) (wrap - gad->max) < fdplt)
3828 fds = wrap - gad->max;
3837 /* If odd was initially computed as an offset past the wrap point,
3840 odd = gad->min + odd - gad->max;
3842 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3843 before returning, so do it here too. This guarantees that,
3844 should cur and fdcur meet at the wrap point, they'll both be
3846 if (gad->cur == gad->max)
3847 gad->cur = gad->min;
3852 /* Compute the location of the next GOT entry, given the allocation
3853 data for a range. */
3855 inline static bfd_signed_vma
3856 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3862 /* If there was an odd word left behind, use it. */
3868 /* Otherwise, use the word pointed to by cur, reserve the next
3869 as an odd word, and skip to the next pair of words, possibly
3872 gad->odd = gad->cur + 4;
3874 if (gad->cur == gad->max)
3875 gad->cur = gad->min;
3881 /* Compute the location of the next function descriptor entry in the
3882 GOT, given the allocation data for a range. */
3884 inline static bfd_signed_vma
3885 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3887 /* If we're at the bottom, wrap around, and only then allocate the
3888 next pair of words. */
3889 if (gad->fdcur == gad->min)
3890 gad->fdcur = gad->max;
3891 return gad->fdcur -= 8;
3894 /* Assign GOT offsets for every GOT entry and function descriptor.
3895 Doing everything in a single pass is tricky. */
3898 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3900 struct bfinfdpic_relocs_info *entry = *entryp;
3901 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3904 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3905 else if (entry->gothilo)
3906 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3908 if (entry->fdgot17m4)
3909 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3910 else if (entry->fdgothilo)
3911 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3913 if (entry->fdgoff17m4)
3914 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3915 else if (entry->plt && dinfo->got17m4.fdplt)
3917 dinfo->got17m4.fdplt -= 8;
3918 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3920 else if (entry->plt)
3922 dinfo->gothilo.fdplt -= 8;
3923 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3925 else if (entry->privfd)
3926 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3931 /* Assign GOT offsets to private function descriptors used by PLT
3932 entries (or referenced by 32-bit offsets), as well as PLT entries
3933 and lazy PLT entries. */
3936 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3938 struct bfinfdpic_relocs_info *entry = *entryp;
3939 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3941 /* If this symbol requires a local function descriptor, allocate
3943 if (entry->privfd && entry->fd_entry == 0)
3945 if (dinfo->got17m4.fdplt)
3947 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3948 dinfo->got17m4.fdplt -= 8;
3952 BFD_ASSERT (dinfo->gothilo.fdplt);
3953 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3954 dinfo->gothilo.fdplt -= 8;
3962 /* We use the section's raw size to mark the location of the
3964 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3966 /* Figure out the length of this PLT entry based on the
3967 addressing mode we need to reach the function descriptor. */
3968 BFD_ASSERT (entry->fd_entry);
3969 if (entry->fd_entry >= -(1 << (18 - 1))
3970 && entry->fd_entry + 4 < (1 << (18 - 1)))
3975 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3980 entry->lzplt_entry = dinfo->g.lzplt;
3981 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3982 /* If this entry is the one that gets the resolver stub, account
3983 for the additional instruction. */
3984 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3985 == BFINFDPIC_LZPLT_RESOLV_LOC)
3986 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3992 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3993 _bfinfdpic_assign_plt_entries. */
3996 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
3998 struct bfinfdpic_relocs_info *entry = *entryp;
4000 entry->got_entry = 0;
4001 entry->fdgot_entry = 0;
4002 entry->fd_entry = 0;
4003 entry->plt_entry = (bfd_vma)-1;
4004 entry->lzplt_entry = (bfd_vma)-1;
4009 /* Follow indirect and warning hash entries so that each got entry
4010 points to the final symbol definition. P must point to a pointer
4011 to the hash table we're traversing. Since this traversal may
4012 modify the hash table, we set this pointer to NULL to indicate
4013 we've made a potentially-destructive change to the hash table, so
4014 the traversal must be restarted. */
4016 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4018 struct bfinfdpic_relocs_info *entry = *entryp;
4021 if (entry->symndx == -1)
4023 struct elf_link_hash_entry *h = entry->d.h;
4024 struct bfinfdpic_relocs_info *oentry;
4026 while (h->root.type == bfd_link_hash_indirect
4027 || h->root.type == bfd_link_hash_warning)
4028 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4030 if (entry->d.h == h)
4033 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4038 /* Merge the two entries. */
4039 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4040 htab_clear_slot (*htab, entryp);
4046 /* If we can't find this entry with the new bfd hash, re-insert
4047 it, and get the traversal restarted. */
4048 if (! htab_find (*htab, entry))
4050 htab_clear_slot (*htab, entryp);
4051 entryp = htab_find_slot (*htab, entry, INSERT);
4054 /* Abort the traversal, since the whole table may have
4055 moved, and leave it up to the parent to restart the
4057 *(htab_t *)p = NULL;
4065 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4066 section and the rofixup section. Assign locations for GOT and PLT
4070 _bfinfdpic_size_got_plt (bfd *output_bfd,
4071 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4075 struct bfd_link_info *info = gpinfop->g.info;
4076 bfd *dynobj = elf_hash_table (info)->dynobj;
4078 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4079 sizeof (gpinfop->g));
4082 /* Compute the total size taken by entries in the 18-bit range,
4083 to tell how many PLT function descriptors we can bring into it
4084 without causing it to overflow. */
4085 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4086 if (limit < (bfd_vma)1 << 18)
4087 limit = ((bfd_vma)1 << 18) - limit;
4090 if (gpinfop->g.fdplt < limit)
4091 limit = gpinfop->g.fdplt;
4093 /* Determine the ranges of GOT offsets that we can use for each
4094 range of addressing modes. */
4095 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4102 (bfd_vma)1 << (18-1));
4103 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4104 gpinfop->got17m4.min,
4106 gpinfop->got17m4.max,
4109 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4110 (bfd_vma)1 << (32-1));
4112 /* Now assign (most) GOT offsets. */
4113 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4116 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4117 - gpinfop->gothilo.min
4118 /* If an odd word is the last word of the GOT, we don't need this
4119 word to be part of the GOT. */
4120 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4121 if (bfinfdpic_got_section (info)->size == 0)
4122 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4123 else if (bfinfdpic_got_section (info)->size == 12
4124 && ! elf_hash_table (info)->dynamic_sections_created)
4126 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4127 bfinfdpic_got_section (info)->size = 0;
4131 bfinfdpic_got_section (info)->contents =
4132 (bfd_byte *) bfd_zalloc (dynobj,
4133 bfinfdpic_got_section (info)->size);
4134 if (bfinfdpic_got_section (info)->contents == NULL)
4138 if (elf_hash_table (info)->dynamic_sections_created)
4139 /* Subtract the number of lzplt entries, since those will generate
4140 relocations in the pltrel section. */
4141 bfinfdpic_gotrel_section (info)->size =
4142 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4143 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4145 BFD_ASSERT (gpinfop->g.relocs == 0);
4146 if (bfinfdpic_gotrel_section (info)->size == 0)
4147 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4150 bfinfdpic_gotrel_section (info)->contents =
4151 (bfd_byte *) bfd_zalloc (dynobj,
4152 bfinfdpic_gotrel_section (info)->size);
4153 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4157 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4158 if (bfinfdpic_gotfixup_section (info)->size == 0)
4159 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4162 bfinfdpic_gotfixup_section (info)->contents =
4163 (bfd_byte *) bfd_zalloc (dynobj,
4164 bfinfdpic_gotfixup_section (info)->size);
4165 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4169 if (elf_hash_table (info)->dynamic_sections_created)
4170 bfinfdpic_pltrel_section (info)->size =
4171 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4172 if (bfinfdpic_pltrel_section (info)->size == 0)
4173 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4176 bfinfdpic_pltrel_section (info)->contents =
4177 (bfd_byte *) bfd_zalloc (dynobj,
4178 bfinfdpic_pltrel_section (info)->size);
4179 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4183 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4184 such that there's room for the additional instruction needed to
4185 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4186 account for them, our block size is 4 bytes smaller than the real
4188 if (elf_hash_table (info)->dynamic_sections_created)
4190 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4191 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4192 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4195 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4196 actually assign lazy PLT entries addresses. */
4197 gpinfop->g.lzplt = 0;
4199 /* Save information that we're going to need to generate GOT and PLT
4201 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4203 if (get_elf_backend_data (output_bfd)->want_got_sym)
4204 elf_hash_table (info)->hgot->root.u.def.value
4205 = bfinfdpic_got_initial_offset (info);
4207 if (elf_hash_table (info)->dynamic_sections_created)
4208 bfinfdpic_plt_initial_offset (info) =
4209 bfinfdpic_plt_section (info)->size;
4211 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4214 /* Allocate the PLT section contents only after
4215 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4216 non-lazy PLT entries. */
4217 if (bfinfdpic_plt_section (info)->size == 0)
4218 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4221 bfinfdpic_plt_section (info)->contents =
4222 (bfd_byte *) bfd_zalloc (dynobj,
4223 bfinfdpic_plt_section (info)->size);
4224 if (bfinfdpic_plt_section (info)->contents == NULL)
4231 /* Set the sizes of the dynamic sections. */
4234 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4235 struct bfd_link_info *info)
4237 struct elf_link_hash_table *htab;
4240 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4242 htab = elf_hash_table (info);
4243 dynobj = htab->dynobj;
4244 BFD_ASSERT (dynobj != NULL);
4246 if (htab->dynamic_sections_created)
4248 /* Set the contents of the .interp section to the interpreter. */
4249 if (info->executable)
4251 s = bfd_get_linker_section (dynobj, ".interp");
4252 BFD_ASSERT (s != NULL);
4253 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4254 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4258 memset (&gpinfo, 0, sizeof (gpinfo));
4259 gpinfo.g.info = info;
4263 htab_t relocs = bfinfdpic_relocs_info (info);
4265 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4267 if (relocs == bfinfdpic_relocs_info (info))
4271 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4274 /* Allocate space to save the summary information, we're going to
4275 use it if we're doing relaxations. */
4276 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4278 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4281 if (elf_hash_table (info)->dynamic_sections_created)
4283 if (bfinfdpic_got_section (info)->size)
4284 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4287 if (bfinfdpic_pltrel_section (info)->size)
4288 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4289 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4290 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4293 if (bfinfdpic_gotrel_section (info)->size)
4294 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4295 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4296 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4297 sizeof (Elf32_External_Rel)))
4301 s = bfd_get_linker_section (dynobj, ".dynbss");
4302 if (s && s->size == 0)
4303 s->flags |= SEC_EXCLUDE;
4305 s = bfd_get_linker_section (dynobj, ".rela.bss");
4306 if (s && s->size == 0)
4307 s->flags |= SEC_EXCLUDE;
4313 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4314 struct bfd_link_info *info)
4316 if (!info->relocatable
4317 && !bfd_elf_stack_segment_size (output_bfd, info,
4318 "__stacksize", DEFAULT_STACK_SIZE))
4324 /* Check whether any of the relocations was optimized away, and
4325 subtract it from the relocation or fixup count. */
4327 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4328 struct bfd_link_info *info,
4329 bfd_boolean *changed)
4331 Elf_Internal_Shdr *symtab_hdr;
4332 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4333 Elf_Internal_Rela *rel, *erel;
4335 if ((sec->flags & SEC_RELOC) == 0
4336 || sec->reloc_count == 0)
4339 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4340 sym_hashes = elf_sym_hashes (abfd);
4341 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4342 if (!elf_bad_symtab (abfd))
4343 sym_hashes_end -= symtab_hdr->sh_info;
4345 rel = elf_section_data (sec)->relocs;
4347 /* Now examine each relocation. */
4348 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4350 struct elf_link_hash_entry *h;
4351 unsigned long r_symndx;
4352 struct bfinfdpic_relocs_info *picrel;
4353 struct _bfinfdpic_dynamic_got_info *dinfo;
4355 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4356 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4359 if (_bfd_elf_section_offset (sec->output_section->owner,
4360 info, sec, rel->r_offset)
4364 r_symndx = ELF32_R_SYM (rel->r_info);
4365 if (r_symndx < symtab_hdr->sh_info)
4369 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4370 while (h->root.type == bfd_link_hash_indirect
4371 || h->root.type == bfd_link_hash_warning)
4372 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4376 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4378 rel->r_addend, NO_INSERT);
4380 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4382 rel->r_addend, NO_INSERT);
4388 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4390 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4391 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4393 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4395 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4402 bfinfdpic_elf_discard_info (bfd *ibfd,
4403 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4404 struct bfd_link_info *info)
4406 bfd_boolean changed = FALSE;
4410 /* Account for relaxation of .eh_frame section. */
4411 for (s = ibfd->sections; s; s = s->next)
4412 if (s->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4414 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4416 obfd = s->output_section->owner;
4421 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4423 memset (&gpinfo, 0, sizeof (gpinfo));
4424 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4427 /* Clear GOT and PLT assignments. */
4428 htab_traverse (bfinfdpic_relocs_info (info),
4429 _bfinfdpic_reset_got_plt_entries,
4432 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4440 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4441 struct bfd_link_info *info)
4446 dynobj = elf_hash_table (info)->dynobj;
4448 if (bfinfdpic_got_section (info))
4450 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4451 == (bfinfdpic_gotrel_section (info)->reloc_count
4452 * sizeof (Elf32_External_Rel)));
4454 if (bfinfdpic_gotfixup_section (info))
4456 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4457 bfd_vma got_value = hgot->root.u.def.value
4458 + hgot->root.u.def.section->output_section->vma
4459 + hgot->root.u.def.section->output_offset;
4461 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4464 if (bfinfdpic_gotfixup_section (info)->size
4465 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4467 (*_bfd_error_handler)
4468 ("LINKER BUG: .rofixup section size mismatch");
4473 if (elf_hash_table (info)->dynamic_sections_created)
4475 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4476 == (bfinfdpic_pltrel_section (info)->reloc_count
4477 * sizeof (Elf32_External_Rel)));
4480 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4482 if (elf_hash_table (info)->dynamic_sections_created)
4484 Elf32_External_Dyn * dyncon;
4485 Elf32_External_Dyn * dynconend;
4487 BFD_ASSERT (sdyn != NULL);
4489 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4490 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4492 for (; dyncon < dynconend; dyncon++)
4494 Elf_Internal_Dyn dyn;
4496 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4504 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4505 + bfinfdpic_got_section (info)->output_offset
4506 + bfinfdpic_got_initial_offset (info);
4507 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4511 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4512 ->output_section->vma
4513 + bfinfdpic_pltrel_section (info)->output_offset;
4514 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4518 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4519 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4528 /* Adjust a symbol defined by a dynamic object and referenced by a
4532 elf32_bfinfdpic_adjust_dynamic_symbol (struct bfd_link_info *info,
4533 struct elf_link_hash_entry *h)
4537 dynobj = elf_hash_table (info)->dynobj;
4539 /* Make sure we know what is going on here. */
4540 BFD_ASSERT (dynobj != NULL
4541 && (h->u.weakdef != NULL
4544 && !h->def_regular)));
4546 /* If this is a weak symbol, and there is a real definition, the
4547 processor independent code will have arranged for us to see the
4548 real definition first, and we can just use the same value. */
4549 if (h->u.weakdef != NULL)
4551 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4552 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4553 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4554 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4560 /* Perform any actions needed for dynamic symbols. */
4563 elf32_bfinfdpic_finish_dynamic_symbol
4564 (bfd *output_bfd ATTRIBUTE_UNUSED,
4565 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4566 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4567 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4572 /* Decide whether to attempt to turn absptr or lsda encodings in
4573 shared libraries into pcrel within the given input section. */
4576 bfinfdpic_elf_use_relative_eh_frame
4577 (bfd *input_bfd ATTRIBUTE_UNUSED,
4578 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4579 asection *eh_frame_section ATTRIBUTE_UNUSED)
4581 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4585 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4588 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4589 struct bfd_link_info *info,
4590 asection *osec, bfd_vma offset,
4591 asection *loc_sec, bfd_vma loc_offset,
4594 struct elf_link_hash_entry *h;
4596 h = elf_hash_table (info)->hgot;
4597 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4599 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4600 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4601 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4602 loc_sec, loc_offset, encoded);
4604 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4605 == (_bfinfdpic_osec_to_segment
4606 (abfd, h->root.u.def.section->output_section)));
4608 *encoded = osec->vma + offset
4609 - (h->root.u.def.value
4610 + h->root.u.def.section->output_section->vma
4611 + h->root.u.def.section->output_offset);
4613 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4618 /* Look through the relocs for a section during the first phase.
4620 Besides handling virtual table relocs for gc, we have to deal with
4621 all sorts of PIC-related relocations. We describe below the
4622 general plan on how to handle such relocations, even though we only
4623 collect information at this point, storing them in hash tables for
4624 perusal of later passes.
4626 32 relocations are propagated to the linker output when creating
4627 position-independent output. LO16 and HI16 relocations are not
4628 supposed to be encountered in this case.
4630 LABEL16 should always be resolvable by the linker, since it's only
4633 LABEL24, on the other hand, is used by calls. If it turns out that
4634 the target of a call is a dynamic symbol, a PLT entry must be
4635 created for it, which triggers the creation of a private function
4636 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4638 GPREL relocations require the referenced symbol to be in the same
4639 segment as _gp, but this can only be checked later.
4641 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4642 exist. LABEL24 might as well, since it may require a PLT entry,
4643 that will require a got.
4645 Non-FUNCDESC GOT relocations require a GOT entry to be created
4646 regardless of whether the symbol is dynamic. However, since a
4647 global symbol that turns out to not be exported may have the same
4648 address of a non-dynamic symbol, we don't assign GOT entries at
4649 this point, such that we can share them in this case. A relocation
4650 for the GOT entry always has to be created, be it to offset a
4651 private symbol by the section load address, be it to get the symbol
4652 resolved dynamically.
4654 FUNCDESC GOT relocations require a GOT entry to be created, and
4655 handled as if a FUNCDESC relocation was applied to the GOT entry in
4658 FUNCDESC relocations referencing a symbol that turns out to NOT be
4659 dynamic cause a private function descriptor to be created. The
4660 FUNCDESC relocation then decays to a 32 relocation that points at
4661 the private descriptor. If the symbol is dynamic, the FUNCDESC
4662 relocation is propagated to the linker output, such that the
4663 dynamic linker creates the canonical descriptor, pointing to the
4664 dynamically-resolved definition of the function.
4666 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4667 symbols that are assigned to the same segment as the GOT, but we
4668 can only check this later, after we know the complete set of
4669 symbols defined and/or exported.
4671 FUNCDESC GOTOFF relocations require a function descriptor to be
4672 created and, unless lazy binding is disabled or the symbol is not
4673 dynamic, a lazy PLT entry. Since we can't tell at this point
4674 whether a symbol is going to be dynamic, we have to decide later
4675 whether to create a lazy PLT entry or bind the descriptor directly
4676 to the private function.
4678 FUNCDESC_VALUE relocations are not supposed to be present in object
4679 files, but they may very well be simply propagated to the linker
4680 output, since they have no side effect.
4683 A function descriptor always requires a FUNCDESC_VALUE relocation.
4684 Whether it's in .plt.rel or not depends on whether lazy binding is
4685 enabled and on whether the referenced symbol is dynamic.
4687 The existence of a lazy PLT requires the resolverStub lazy PLT
4688 entry to be present.
4691 As for assignment of GOT, PLT and lazy PLT entries, and private
4692 descriptors, we might do them all sequentially, but we can do
4693 better than that. For example, we can place GOT entries and
4694 private function descriptors referenced using 12-bit operands
4695 closer to the PIC register value, such that these relocations don't
4696 overflow. Those that are only referenced with LO16 relocations
4697 could come next, but we may as well place PLT-required function
4698 descriptors in the 12-bit range to make them shorter. Symbols
4699 referenced with LO16/HI16 may come next, but we may place
4700 additional function descriptors in the 16-bit range if we can
4701 reliably tell that we've already placed entries that are ever
4702 referenced with only LO16. PLT entries are therefore generated as
4703 small as possible, while not introducing relocation overflows in
4704 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4705 generated before or after PLT entries, but not intermingled with
4706 them, such that we can have more lazy PLT entries in range for a
4707 branch to the resolverStub. The resolverStub should be emitted at
4708 the most distant location from the first lazy PLT entry such that
4709 it's still in range for a branch, or closer, if there isn't a need
4710 for so many lazy PLT entries. Additional lazy PLT entries may be
4711 emitted after the resolverStub, as long as branches are still in
4712 range. If the branch goes out of range, longer lazy PLT entries
4715 We could further optimize PLT and lazy PLT entries by giving them
4716 priority in assignment to closer-to-gr17 locations depending on the
4717 number of occurrences of references to them (assuming a function
4718 that's called more often is more important for performance, so its
4719 PLT entry should be faster), or taking hints from the compiler.
4720 Given infinite time and money... :-) */
4723 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4724 asection *sec, const Elf_Internal_Rela *relocs)
4726 Elf_Internal_Shdr *symtab_hdr;
4727 struct elf_link_hash_entry **sym_hashes;
4728 const Elf_Internal_Rela *rel;
4729 const Elf_Internal_Rela *rel_end;
4731 struct bfinfdpic_relocs_info *picrel;
4733 if (info->relocatable)
4736 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4737 sym_hashes = elf_sym_hashes (abfd);
4739 dynobj = elf_hash_table (info)->dynobj;
4740 rel_end = relocs + sec->reloc_count;
4741 for (rel = relocs; rel < rel_end; rel++)
4743 struct elf_link_hash_entry *h;
4744 unsigned long r_symndx;
4746 r_symndx = ELF32_R_SYM (rel->r_info);
4747 if (r_symndx < symtab_hdr->sh_info)
4750 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4752 switch (ELF32_R_TYPE (rel->r_info))
4754 case R_BFIN_GOT17M4:
4757 case R_BFIN_FUNCDESC_GOT17M4:
4758 case R_BFIN_FUNCDESC_GOTHI:
4759 case R_BFIN_FUNCDESC_GOTLO:
4760 case R_BFIN_GOTOFF17M4:
4761 case R_BFIN_GOTOFFHI:
4762 case R_BFIN_GOTOFFLO:
4763 case R_BFIN_FUNCDESC_GOTOFF17M4:
4764 case R_BFIN_FUNCDESC_GOTOFFHI:
4765 case R_BFIN_FUNCDESC_GOTOFFLO:
4766 case R_BFIN_FUNCDESC:
4767 case R_BFIN_FUNCDESC_VALUE:
4768 if (! IS_FDPIC (abfd))
4771 case R_BFIN_PCREL24:
4772 case R_BFIN_PCREL24_JUMP_L:
4773 case R_BFIN_BYTE4_DATA:
4774 if (IS_FDPIC (abfd) && ! dynobj)
4776 elf_hash_table (info)->dynobj = dynobj = abfd;
4777 if (! _bfin_create_got_section (abfd, info))
4780 if (! IS_FDPIC (abfd))
4787 if (h->dynindx == -1)
4788 switch (ELF_ST_VISIBILITY (h->other))
4794 bfd_elf_link_record_dynamic_symbol (info, h);
4798 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4800 rel->r_addend, INSERT);
4803 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4804 (info), abfd, r_symndx,
4805 rel->r_addend, INSERT);
4815 switch (ELF32_R_TYPE (rel->r_info))
4817 case R_BFIN_PCREL24:
4818 case R_BFIN_PCREL24_JUMP_L:
4819 if (IS_FDPIC (abfd))
4823 case R_BFIN_FUNCDESC_VALUE:
4824 picrel->relocsfdv++;
4825 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4829 case R_BFIN_BYTE4_DATA:
4830 if (! IS_FDPIC (abfd))
4834 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4838 case R_BFIN_GOT17M4:
4847 case R_BFIN_FUNCDESC_GOT17M4:
4848 picrel->fdgot17m4++;
4851 case R_BFIN_FUNCDESC_GOTHI:
4852 case R_BFIN_FUNCDESC_GOTLO:
4853 picrel->fdgothilo++;
4856 case R_BFIN_GOTOFF17M4:
4857 case R_BFIN_GOTOFFHI:
4858 case R_BFIN_GOTOFFLO:
4862 case R_BFIN_FUNCDESC_GOTOFF17M4:
4863 picrel->fdgoff17m4++;
4866 case R_BFIN_FUNCDESC_GOTOFFHI:
4867 case R_BFIN_FUNCDESC_GOTOFFLO:
4868 picrel->fdgoffhilo++;
4871 case R_BFIN_FUNCDESC:
4876 /* This relocation describes the C++ object vtable hierarchy.
4877 Reconstruct it for later use during GC. */
4878 case R_BFIN_GNU_VTINHERIT:
4879 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4883 /* This relocation describes which C++ vtable entries are actually
4884 used. Record for later use during GC. */
4885 case R_BFIN_GNU_VTENTRY:
4886 BFD_ASSERT (h != NULL);
4888 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4892 case R_BFIN_HUIMM16:
4893 case R_BFIN_LUIMM16:
4894 case R_BFIN_PCREL12_JUMP_S:
4895 case R_BFIN_PCREL10:
4900 (*_bfd_error_handler)
4901 (_("%B: unsupported relocation type %i"),
4902 abfd, ELF32_R_TYPE (rel->r_info));
4910 /* Set the right machine number for a Blackfin ELF file. */
4913 elf32_bfin_object_p (bfd *abfd)
4915 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4916 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4917 == (IS_FDPIC (abfd)));
4921 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4923 elf_elfheader (abfd)->e_flags = flags;
4924 elf_flags_init (abfd) = TRUE;
4928 /* Copy backend specific data from one object module to another. */
4931 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4933 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4934 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4937 BFD_ASSERT (!elf_flags_init (obfd)
4938 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
4940 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
4941 elf_flags_init (obfd) = TRUE;
4943 /* Copy object attributes. */
4944 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4950 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4952 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4953 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4956 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
4959 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
4960 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
4967 /* Display the flags field. */
4969 elf32_bfin_print_private_bfd_data (bfd * abfd, void * ptr)
4971 FILE *file = (FILE *) ptr;
4974 BFD_ASSERT (abfd != NULL && ptr != NULL);
4976 /* Print normal ELF private data. */
4977 _bfd_elf_print_private_bfd_data (abfd, ptr);
4979 flags = elf_elfheader (abfd)->e_flags;
4981 /* xgettext:c-format */
4982 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4984 if (flags & EF_BFIN_PIC)
4985 fprintf (file, " -fpic");
4987 if (flags & EF_BFIN_FDPIC)
4988 fprintf (file, " -mfdpic");
4995 /* Merge backend specific data from an object file to the output
4996 object file when linking. */
4999 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5001 flagword old_flags, new_flags;
5002 bfd_boolean error = FALSE;
5004 new_flags = elf_elfheader (ibfd)->e_flags;
5005 old_flags = elf_elfheader (obfd)->e_flags;
5007 if (new_flags & EF_BFIN_FDPIC)
5008 new_flags &= ~EF_BFIN_PIC;
5013 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
5014 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
5015 bfd_get_filename (ibfd));
5017 if (!elf_flags_init (obfd)) /* First call, no flags set. */
5019 elf_flags_init (obfd) = TRUE;
5020 elf_elfheader (obfd)->e_flags = new_flags;
5023 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
5026 if (IS_FDPIC (obfd))
5027 (*_bfd_error_handler)
5028 (_("%s: cannot link non-fdpic object file into fdpic executable"),
5029 bfd_get_filename (ibfd));
5031 (*_bfd_error_handler)
5032 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5033 bfd_get_filename (ibfd));
5037 bfd_set_error (bfd_error_bad_value);
5042 /* bfin ELF linker hash entry. */
5044 struct bfin_link_hash_entry
5046 struct elf_link_hash_entry root;
5048 /* Number of PC relative relocs copied for this symbol. */
5049 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5052 /* bfin ELF linker hash table. */
5054 struct bfin_link_hash_table
5056 struct elf_link_hash_table root;
5058 /* Small local sym cache. */
5059 struct sym_cache sym_cache;
5062 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5064 static struct bfd_hash_entry *
5065 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5066 struct bfd_hash_table *table, const char *string)
5068 struct bfd_hash_entry *ret = entry;
5070 /* Allocate the structure if it has not already been allocated by a
5073 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5077 /* Call the allocation method of the superclass. */
5078 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5080 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5085 /* Create an bfin ELF linker hash table. */
5087 static struct bfd_link_hash_table *
5088 bfin_link_hash_table_create (bfd * abfd)
5090 struct bfin_link_hash_table *ret;
5091 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5093 ret = bfd_zmalloc (amt);
5097 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5098 bfin_link_hash_newfunc,
5099 sizeof (struct elf_link_hash_entry),
5106 ret->sym_cache.abfd = NULL;
5108 return &ret->root.root;
5111 /* The size in bytes of an entry in the procedure linkage table. */
5113 /* Finish up the dynamic sections. */
5116 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5117 struct bfd_link_info *info)
5122 dynobj = elf_hash_table (info)->dynobj;
5124 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5126 if (elf_hash_table (info)->dynamic_sections_created)
5128 Elf32_External_Dyn *dyncon, *dynconend;
5130 BFD_ASSERT (sdyn != NULL);
5132 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5133 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5134 for (; dyncon < dynconend; dyncon++)
5136 Elf_Internal_Dyn dyn;
5138 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5146 /* Finish up dynamic symbol handling. We set the contents of various
5147 dynamic sections here. */
5150 bfin_finish_dynamic_symbol (bfd * output_bfd,
5151 struct bfd_link_info *info,
5152 struct elf_link_hash_entry *h,
5153 Elf_Internal_Sym * sym)
5157 dynobj = elf_hash_table (info)->dynobj;
5159 if (h->got.offset != (bfd_vma) - 1)
5163 Elf_Internal_Rela rela;
5166 /* This symbol has an entry in the global offset table.
5169 sgot = bfd_get_linker_section (dynobj, ".got");
5170 srela = bfd_get_linker_section (dynobj, ".rela.got");
5171 BFD_ASSERT (sgot != NULL && srela != NULL);
5173 rela.r_offset = (sgot->output_section->vma
5174 + sgot->output_offset
5175 + (h->got.offset & ~(bfd_vma) 1));
5177 /* If this is a -Bsymbolic link, and the symbol is defined
5178 locally, we just want to emit a RELATIVE reloc. Likewise if
5179 the symbol was forced to be local because of a version file.
5180 The entry in the global offset table will already have been
5181 initialized in the relocate_section function. */
5184 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5186 (*_bfd_error_handler) (_("*** check this relocation %s"),
5188 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5189 rela.r_addend = bfd_get_signed_32 (output_bfd,
5193 offset & ~(bfd_vma) 1)));
5197 bfd_put_32 (output_bfd, (bfd_vma) 0,
5198 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5199 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5203 loc = srela->contents;
5204 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5205 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5212 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5213 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5214 || h == elf_hash_table (info)->hgot)
5215 sym->st_shndx = SHN_ABS;
5220 /* Adjust a symbol defined by a dynamic object and referenced by a
5221 regular object. The current definition is in some section of the
5222 dynamic object, but we're not including those sections. We have to
5223 change the definition to something the rest of the link can
5227 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5228 struct elf_link_hash_entry *h)
5232 unsigned int power_of_two;
5234 dynobj = elf_hash_table (info)->dynobj;
5236 /* Make sure we know what is going on here. */
5237 BFD_ASSERT (dynobj != NULL
5239 || h->u.weakdef != NULL
5240 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5242 /* If this is a function, put it in the procedure linkage table. We
5243 will fill in the contents of the procedure linkage table later,
5244 when we know the address of the .got section. */
5245 if (h->type == STT_FUNC || h->needs_plt)
5250 /* If this is a weak symbol, and there is a real definition, the
5251 processor independent code will have arranged for us to see the
5252 real definition first, and we can just use the same value. */
5253 if (h->u.weakdef != NULL)
5255 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5256 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5257 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5258 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5262 /* This is a reference to a symbol defined by a dynamic object which
5263 is not a function. */
5265 /* If we are creating a shared library, we must presume that the
5266 only references to the symbol are via the global offset table.
5267 For such cases we need not do anything here; the relocations will
5268 be handled correctly by relocate_section. */
5272 /* We must allocate the symbol in our .dynbss section, which will
5273 become part of the .bss section of the executable. There will be
5274 an entry for this symbol in the .dynsym section. The dynamic
5275 object will contain position independent code, so all references
5276 from the dynamic object to this symbol will go through the global
5277 offset table. The dynamic linker will use the .dynsym entry to
5278 determine the address it must put in the global offset table, so
5279 both the dynamic object and the regular object will refer to the
5280 same memory location for the variable. */
5282 s = bfd_get_linker_section (dynobj, ".dynbss");
5283 BFD_ASSERT (s != NULL);
5285 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5286 copy the initial value out of the dynamic object and into the
5287 runtime process image. We need to remember the offset into the
5288 .rela.bss section we are going to use. */
5289 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5293 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5294 BFD_ASSERT (srel != NULL);
5295 srel->size += sizeof (Elf32_External_Rela);
5299 /* We need to figure out the alignment required for this symbol. I
5300 have no idea how ELF linkers handle this. */
5301 power_of_two = bfd_log2 (h->size);
5302 if (power_of_two > 3)
5305 /* Apply the required alignment. */
5306 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5307 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5309 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5313 /* Define the symbol as being at this point in the section. */
5314 h->root.u.def.section = s;
5315 h->root.u.def.value = s->size;
5317 /* Increment the section size to make room for the symbol. */
5323 /* The bfin linker needs to keep track of the number of relocs that it
5324 decides to copy in check_relocs for each symbol. This is so that it
5325 can discard PC relative relocs if it doesn't need them when linking
5326 with -Bsymbolic. We store the information in a field extending the
5327 regular ELF linker hash table. */
5329 /* This structure keeps track of the number of PC relative relocs we have
5330 copied for a given symbol. */
5332 struct bfin_pcrel_relocs_copied
5335 struct bfin_pcrel_relocs_copied *next;
5336 /* A section in dynobj. */
5338 /* Number of relocs copied in this section. */
5339 bfd_size_type count;
5342 /* This function is called via elf_link_hash_traverse if we are
5343 creating a shared object. In the -Bsymbolic case it discards the
5344 space allocated to copy PC relative relocs against symbols which
5345 are defined in regular objects. For the normal shared case, it
5346 discards space for pc-relative relocs that have become local due to
5347 symbol visibility changes. We allocated space for them in the
5348 check_relocs routine, but we won't fill them in in the
5349 relocate_section routine.
5351 We also check whether any of the remaining relocations apply
5352 against a readonly section, and set the DF_TEXTREL flag in this
5356 bfin_discard_copies (struct elf_link_hash_entry *h, void * inf)
5358 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5359 struct bfin_pcrel_relocs_copied *s;
5361 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5363 if ((info->flags & DF_TEXTREL) == 0)
5365 /* Look for relocations against read-only sections. */
5366 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5367 s != NULL; s = s->next)
5368 if ((s->section->flags & SEC_READONLY) != 0)
5370 info->flags |= DF_TEXTREL;
5378 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5379 s != NULL; s = s->next)
5380 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5386 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5387 struct bfd_link_info *info)
5393 dynobj = elf_hash_table (info)->dynobj;
5394 BFD_ASSERT (dynobj != NULL);
5396 if (elf_hash_table (info)->dynamic_sections_created)
5398 /* Set the contents of the .interp section to the interpreter. */
5399 if (info->executable)
5401 s = bfd_get_linker_section (dynobj, ".interp");
5402 BFD_ASSERT (s != NULL);
5403 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5404 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5409 /* We may have created entries in the .rela.got section.
5410 However, if we are not creating the dynamic sections, we will
5411 not actually use these entries. Reset the size of .rela.got,
5412 which will cause it to get stripped from the output file
5414 s = bfd_get_linker_section (dynobj, ".rela.got");
5419 /* If this is a -Bsymbolic shared link, then we need to discard all
5420 PC relative relocs against symbols defined in a regular object.
5421 For the normal shared case we discard the PC relative relocs
5422 against symbols that have become local due to visibility changes.
5423 We allocated space for them in the check_relocs routine, but we
5424 will not fill them in in the relocate_section routine. */
5426 elf_link_hash_traverse (elf_hash_table (info),
5427 bfin_discard_copies, info);
5429 /* The check_relocs and adjust_dynamic_symbol entry points have
5430 determined the sizes of the various dynamic sections. Allocate
5433 for (s = dynobj->sections; s != NULL; s = s->next)
5438 if ((s->flags & SEC_LINKER_CREATED) == 0)
5441 /* It's OK to base decisions on the section name, because none
5442 of the dynobj section names depend upon the input files. */
5443 name = bfd_get_section_name (dynobj, s);
5447 if (CONST_STRNEQ (name, ".rela"))
5451 /* If we don't need this section, strip it from the
5452 output file. This is mostly to handle .rela.bss and
5453 .rela.plt. We must create both sections in
5454 create_dynamic_sections, because they must be created
5455 before the linker maps input sections to output
5456 sections. The linker does that before
5457 adjust_dynamic_symbol is called, and it is that
5458 function which decides whether anything needs to go
5459 into these sections. */
5466 /* We use the reloc_count field as a counter if we need
5467 to copy relocs into the output file. */
5471 else if (! CONST_STRNEQ (name, ".got"))
5473 /* It's not one of our sections, so don't allocate space. */
5479 s->flags |= SEC_EXCLUDE;
5483 /* Allocate memory for the section contents. */
5484 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5485 Unused entries should be reclaimed before the section's contents
5486 are written out, but at the moment this does not happen. Thus in
5487 order to prevent writing out garbage, we initialise the section's
5488 contents to zero. */
5489 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5490 if (s->contents == NULL && s->size != 0)
5494 if (elf_hash_table (info)->dynamic_sections_created)
5496 /* Add some entries to the .dynamic section. We fill in the
5497 values later, in bfin_finish_dynamic_sections, but we
5498 must add the entries now so that we get the correct size for
5499 the .dynamic section. The DT_DEBUG entry is filled in by the
5500 dynamic linker and used by the debugger. */
5501 #define add_dynamic_entry(TAG, VAL) \
5502 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5506 if (!add_dynamic_entry (DT_DEBUG, 0))
5513 if (!add_dynamic_entry (DT_RELA, 0)
5514 || !add_dynamic_entry (DT_RELASZ, 0)
5515 || !add_dynamic_entry (DT_RELAENT,
5516 sizeof (Elf32_External_Rela)))
5520 if ((info->flags & DF_TEXTREL) != 0)
5522 if (!add_dynamic_entry (DT_TEXTREL, 0))
5526 #undef add_dynamic_entry
5531 /* Given a .data section and a .emreloc in-memory section, store
5532 relocation information into the .emreloc section which can be
5533 used at runtime to relocate the section. This is called by the
5534 linker when the --embedded-relocs switch is used. This is called
5535 after the add_symbols entry point has been called for all the
5536 objects, and before the final_link entry point is called. */
5539 bfd_bfin_elf32_create_embedded_relocs (bfd *abfd,
5540 struct bfd_link_info *info,
5545 Elf_Internal_Shdr *symtab_hdr;
5546 Elf_Internal_Sym *isymbuf = NULL;
5547 Elf_Internal_Rela *internal_relocs = NULL;
5548 Elf_Internal_Rela *irel, *irelend;
5552 BFD_ASSERT (! info->relocatable);
5556 if (datasec->reloc_count == 0)
5559 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5561 /* Get a copy of the native relocations. */
5562 internal_relocs = (_bfd_elf_link_read_relocs
5563 (abfd, datasec, NULL, (Elf_Internal_Rela *) NULL,
5564 info->keep_memory));
5565 if (internal_relocs == NULL)
5568 amt = (bfd_size_type) datasec->reloc_count * 12;
5569 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5570 if (relsec->contents == NULL)
5573 p = relsec->contents;
5575 irelend = internal_relocs + datasec->reloc_count;
5576 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5578 asection *targetsec;
5580 /* We are going to write a four byte longword into the runtime
5581 reloc section. The longword will be the address in the data
5582 section which must be relocated. It is followed by the name
5583 of the target section NUL-padded or truncated to 8
5586 /* We can only relocate absolute longword relocs at run time. */
5587 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5589 *errmsg = _("unsupported reloc type");
5590 bfd_set_error (bfd_error_bad_value);
5594 /* Get the target section referred to by the reloc. */
5595 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5597 /* A local symbol. */
5598 Elf_Internal_Sym *isym;
5600 /* Read this BFD's local symbols if we haven't done so already. */
5601 if (isymbuf == NULL)
5603 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5604 if (isymbuf == NULL)
5605 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5606 symtab_hdr->sh_info, 0,
5608 if (isymbuf == NULL)
5612 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5613 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5618 struct elf_link_hash_entry *h;
5620 /* An external symbol. */
5621 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5622 h = elf_sym_hashes (abfd)[indx];
5623 BFD_ASSERT (h != NULL);
5624 if (h->root.type == bfd_link_hash_defined
5625 || h->root.type == bfd_link_hash_defweak)
5626 targetsec = h->root.u.def.section;
5631 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5632 memset (p + 4, 0, 8);
5633 if (targetsec != NULL)
5634 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5637 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5639 if (internal_relocs != NULL
5640 && elf_section_data (datasec)->relocs != internal_relocs)
5641 free (internal_relocs);
5645 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5647 if (internal_relocs != NULL
5648 && elf_section_data (datasec)->relocs != internal_relocs)
5649 free (internal_relocs);
5653 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5655 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5656 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5657 { NULL, 0, 0, 0, 0 }
5661 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5662 #define TARGET_LITTLE_NAME "elf32-bfin"
5663 #define ELF_ARCH bfd_arch_bfin
5664 #define ELF_TARGET_ID BFIN_ELF_DATA
5665 #define ELF_MACHINE_CODE EM_BLACKFIN
5666 #define ELF_MAXPAGESIZE 0x1000
5667 #define elf_symbol_leading_char '_'
5669 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5670 #define bfd_elf32_bfd_reloc_name_lookup \
5671 bfin_bfd_reloc_name_lookup
5672 #define elf_info_to_howto bfin_info_to_howto
5673 #define elf_info_to_howto_rel 0
5674 #define elf_backend_object_p elf32_bfin_object_p
5676 #define bfd_elf32_bfd_is_local_label_name \
5677 bfin_is_local_label_name
5678 #define bfin_hash_table(p) \
5679 ((struct bfin_link_hash_table *) (p)->hash)
5683 #define elf_backend_create_dynamic_sections \
5684 _bfd_elf_create_dynamic_sections
5685 #define bfd_elf32_bfd_link_hash_table_create \
5686 bfin_link_hash_table_create
5687 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5689 #define elf_backend_check_relocs bfin_check_relocs
5690 #define elf_backend_adjust_dynamic_symbol \
5691 bfin_adjust_dynamic_symbol
5692 #define elf_backend_size_dynamic_sections \
5693 bfin_size_dynamic_sections
5694 #define elf_backend_relocate_section bfin_relocate_section
5695 #define elf_backend_finish_dynamic_symbol \
5696 bfin_finish_dynamic_symbol
5697 #define elf_backend_finish_dynamic_sections \
5698 bfin_finish_dynamic_sections
5699 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5700 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5701 #define bfd_elf32_bfd_merge_private_bfd_data \
5702 elf32_bfin_merge_private_bfd_data
5703 #define bfd_elf32_bfd_set_private_flags \
5704 elf32_bfin_set_private_flags
5705 #define bfd_elf32_bfd_print_private_bfd_data \
5706 elf32_bfin_print_private_bfd_data
5707 #define elf_backend_final_write_processing \
5708 elf32_bfin_final_write_processing
5709 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5710 #define elf_backend_stack_align 8
5711 #define elf_backend_can_gc_sections 1
5712 #define elf_backend_special_sections elf32_bfin_special_sections
5713 #define elf_backend_can_refcount 1
5714 #define elf_backend_want_got_plt 0
5715 #define elf_backend_plt_readonly 1
5716 #define elf_backend_want_plt_sym 0
5717 #define elf_backend_got_header_size 12
5718 #define elf_backend_rela_normal 1
5720 #include "elf32-target.h"
5722 #undef TARGET_LITTLE_SYM
5723 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5724 #undef TARGET_LITTLE_NAME
5725 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5727 #define elf32_bed elf32_bfinfdpic_bed
5729 #undef elf_backend_gc_sweep_hook
5730 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5732 #undef elf_backend_got_header_size
5733 #define elf_backend_got_header_size 0
5735 #undef elf_backend_relocate_section
5736 #define elf_backend_relocate_section bfinfdpic_relocate_section
5737 #undef elf_backend_check_relocs
5738 #define elf_backend_check_relocs bfinfdpic_check_relocs
5740 #undef bfd_elf32_bfd_link_hash_table_create
5741 #define bfd_elf32_bfd_link_hash_table_create \
5742 bfinfdpic_elf_link_hash_table_create
5743 #undef elf_backend_always_size_sections
5744 #define elf_backend_always_size_sections \
5745 elf32_bfinfdpic_always_size_sections
5746 #undef bfd_elf32_bfd_copy_private_bfd_data
5747 #define bfd_elf32_bfd_copy_private_bfd_data \
5748 elf32_bfinfdpic_copy_private_bfd_data
5750 #undef elf_backend_create_dynamic_sections
5751 #define elf_backend_create_dynamic_sections \
5752 elf32_bfinfdpic_create_dynamic_sections
5753 #undef elf_backend_adjust_dynamic_symbol
5754 #define elf_backend_adjust_dynamic_symbol \
5755 elf32_bfinfdpic_adjust_dynamic_symbol
5756 #undef elf_backend_size_dynamic_sections
5757 #define elf_backend_size_dynamic_sections \
5758 elf32_bfinfdpic_size_dynamic_sections
5759 #undef elf_backend_finish_dynamic_symbol
5760 #define elf_backend_finish_dynamic_symbol \
5761 elf32_bfinfdpic_finish_dynamic_symbol
5762 #undef elf_backend_finish_dynamic_sections
5763 #define elf_backend_finish_dynamic_sections \
5764 elf32_bfinfdpic_finish_dynamic_sections
5766 #undef elf_backend_discard_info
5767 #define elf_backend_discard_info \
5768 bfinfdpic_elf_discard_info
5769 #undef elf_backend_can_make_relative_eh_frame
5770 #define elf_backend_can_make_relative_eh_frame \
5771 bfinfdpic_elf_use_relative_eh_frame
5772 #undef elf_backend_can_make_lsda_relative_eh_frame
5773 #define elf_backend_can_make_lsda_relative_eh_frame \
5774 bfinfdpic_elf_use_relative_eh_frame
5775 #undef elf_backend_encode_eh_address
5776 #define elf_backend_encode_eh_address \
5777 bfinfdpic_elf_encode_eh_address
5779 #undef elf_backend_may_use_rel_p
5780 #define elf_backend_may_use_rel_p 1
5781 #undef elf_backend_may_use_rela_p
5782 #define elf_backend_may_use_rela_p 1
5783 /* We use REL for dynamic relocations only. */
5784 #undef elf_backend_default_use_rela_p
5785 #define elf_backend_default_use_rela_p 1
5787 #undef elf_backend_omit_section_dynsym
5788 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5790 #include "elf32-target.h"