1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011
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 PTR 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$. */
1142 bfin_is_local_label_name (
1146 if (label[0] == 'L' && label[1] == '$' )
1149 return _bfd_elf_is_local_label_name (abfd, label);
1152 /* Look through the relocs for a section during the first phase, and
1153 allocate space in the global offset table or procedure linkage
1157 bfin_check_relocs (bfd * abfd,
1158 struct bfd_link_info *info,
1160 const Elf_Internal_Rela *relocs)
1163 Elf_Internal_Shdr *symtab_hdr;
1164 struct elf_link_hash_entry **sym_hashes;
1165 bfd_signed_vma *local_got_refcounts;
1166 const Elf_Internal_Rela *rel;
1167 const Elf_Internal_Rela *rel_end;
1170 if (info->relocatable)
1173 dynobj = elf_hash_table (info)->dynobj;
1174 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1175 sym_hashes = elf_sym_hashes (abfd);
1176 local_got_refcounts = elf_local_got_refcounts (abfd);
1181 rel_end = relocs + sec->reloc_count;
1182 for (rel = relocs; rel < rel_end; rel++)
1184 unsigned long r_symndx;
1185 struct elf_link_hash_entry *h;
1187 r_symndx = ELF32_R_SYM (rel->r_info);
1188 if (r_symndx < symtab_hdr->sh_info)
1191 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1193 switch (ELF32_R_TYPE (rel->r_info))
1195 /* This relocation describes the C++ object vtable hierarchy.
1196 Reconstruct it for later use during GC. */
1197 case R_BFIN_GNU_VTINHERIT:
1198 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1202 /* This relocation describes which C++ vtable entries
1203 are actually used. Record for later use during GC. */
1204 case R_BFIN_GNU_VTENTRY:
1205 BFD_ASSERT (h != NULL);
1207 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1213 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1219 /* Create the .got section. */
1220 elf_hash_table (info)->dynobj = dynobj = abfd;
1221 if (!_bfd_elf_create_got_section (dynobj, info))
1227 sgot = bfd_get_section_by_name (dynobj, ".got");
1228 BFD_ASSERT (sgot != NULL);
1231 if (srelgot == NULL && (h != NULL || info->shared))
1233 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1234 if (srelgot == NULL)
1236 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1237 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1239 srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
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 Elf_Internal_Rela * rela)
1306 switch ((int) ELF32_R_TYPE (rela->r_info))
1309 return reloc_class_normal;
1313 static bfd_reloc_status_type
1314 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1315 bfd *input_bfd, asection *input_section,
1316 bfd_byte *contents, bfd_vma address,
1317 bfd_vma value, bfd_vma addend)
1319 int r_type = ELF32_R_TYPE (rel->r_info);
1321 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1323 bfd_reloc_status_type r = bfd_reloc_ok;
1326 if (address > bfd_get_section_limit (input_bfd, input_section))
1327 return bfd_reloc_outofrange;
1331 /* Perform usual pc-relative correction. */
1332 value -= input_section->output_section->vma + input_section->output_offset;
1335 /* We are getting reloc_entry->address 2 byte off from
1336 the start of instruction. Assuming absolute postion
1337 of the reloc data. But, following code had been written assuming
1338 reloc address is starting at begining of instruction.
1339 To compensate that I have increased the value of
1340 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1345 if ((value & 0xFF000000) != 0
1346 && (value & 0xFF000000) != 0xFF000000)
1347 r = bfd_reloc_overflow;
1351 x = bfd_get_16 (input_bfd, contents + address);
1352 x = (x & 0xff00) | ((value >> 16) & 0xff);
1353 bfd_put_16 (input_bfd, x, contents + address);
1355 x = bfd_get_16 (input_bfd, contents + address + 2);
1357 bfd_put_16 (input_bfd, x, contents + address + 2);
1361 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1362 rel->r_offset, value, addend);
1367 bfin_relocate_section (bfd * output_bfd,
1368 struct bfd_link_info *info,
1370 asection * input_section,
1371 bfd_byte * contents,
1372 Elf_Internal_Rela * relocs,
1373 Elf_Internal_Sym * local_syms,
1374 asection ** local_sections)
1377 Elf_Internal_Shdr *symtab_hdr;
1378 struct elf_link_hash_entry **sym_hashes;
1379 bfd_vma *local_got_offsets;
1381 Elf_Internal_Rela *rel;
1382 Elf_Internal_Rela *relend;
1385 dynobj = elf_hash_table (info)->dynobj;
1386 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1387 sym_hashes = elf_sym_hashes (input_bfd);
1388 local_got_offsets = elf_local_got_offsets (input_bfd);
1393 relend = relocs + input_section->reloc_count;
1394 for (; rel < relend; rel++, i++)
1397 reloc_howto_type *howto;
1398 unsigned long r_symndx;
1399 struct elf_link_hash_entry *h;
1400 Elf_Internal_Sym *sym;
1402 bfd_vma relocation = 0;
1403 bfd_boolean unresolved_reloc;
1404 bfd_reloc_status_type r;
1407 r_type = ELF32_R_TYPE (rel->r_info);
1408 if (r_type < 0 || r_type >= 243)
1410 bfd_set_error (bfd_error_bad_value);
1414 if (r_type == R_BFIN_GNU_VTENTRY
1415 || r_type == R_BFIN_GNU_VTINHERIT)
1418 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1421 bfd_set_error (bfd_error_bad_value);
1424 r_symndx = ELF32_R_SYM (rel->r_info);
1429 unresolved_reloc = FALSE;
1431 if (r_symndx < symtab_hdr->sh_info)
1433 sym = local_syms + r_symndx;
1434 sec = local_sections[r_symndx];
1435 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1441 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1442 r_symndx, symtab_hdr, sym_hashes,
1444 unresolved_reloc, warned);
1447 if (sec != NULL && elf_discarded_section (sec))
1448 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1449 rel, relend, howto, contents);
1451 if (info->relocatable)
1454 address = rel->r_offset;
1456 /* Then, process normally. */
1459 case R_BFIN_GNU_VTINHERIT:
1460 case R_BFIN_GNU_VTENTRY:
1461 return bfd_reloc_ok;
1464 /* Relocation is to the address of the entry for this symbol
1465 in the global offset table. */
1467 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1470 /* Relocation is the offset of the entry for this symbol in
1471 the global offset table. */
1478 /* Create the .got section. */
1479 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1480 if (!_bfd_elf_create_got_section (dynobj, info))
1486 sgot = bfd_get_section_by_name (dynobj, ".got");
1487 BFD_ASSERT (sgot != NULL);
1494 off = h->got.offset;
1495 BFD_ASSERT (off != (bfd_vma) - 1);
1496 dyn = elf_hash_table (info)->dynamic_sections_created;
1498 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1505 /* This is actually a static link, or it is a
1506 -Bsymbolic link and the symbol is defined
1507 locally, or the symbol was forced to be local
1508 because of a version file.. We must initialize
1509 this entry in the global offset table. Since
1510 the offset must always be a multiple of 4, we
1511 use the least significant bit to record whether
1512 we have initialized it already.
1514 When doing a dynamic link, we create a .rela.got
1515 relocation entry to initialize the value. This
1516 is done in the finish_dynamic_symbol routine. */
1521 bfd_put_32 (output_bfd, relocation,
1522 sgot->contents + off);
1527 unresolved_reloc = FALSE;
1531 BFD_ASSERT (local_got_offsets != NULL);
1532 off = local_got_offsets[r_symndx];
1533 BFD_ASSERT (off != (bfd_vma) - 1);
1535 /* The offset must always be a multiple of 4. We use
1536 the least significant bit to record whether we have
1537 already generated the necessary reloc. */
1542 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1547 Elf_Internal_Rela outrel;
1550 s = bfd_get_section_by_name (dynobj, ".rela.got");
1551 BFD_ASSERT (s != NULL);
1553 outrel.r_offset = (sgot->output_section->vma
1554 + sgot->output_offset + off);
1556 ELF32_R_INFO (0, R_BFIN_PCREL24);
1557 outrel.r_addend = relocation;
1560 s->reloc_count++ * sizeof (Elf32_External_Rela);
1561 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1564 local_got_offsets[r_symndx] |= 1;
1568 relocation = sgot->output_offset + off;
1570 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1577 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1579 relocation, rel->r_addend);
1584 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1585 because such sections are not SEC_ALLOC and thus ld.so will
1586 not process them. */
1587 if (unresolved_reloc
1588 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
1590 (*_bfd_error_handler)
1591 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1593 input_section, (long) rel->r_offset, h->root.root.string);
1597 if (r != bfd_reloc_ok)
1602 name = h->root.root.string;
1605 name = bfd_elf_string_from_elf_section (input_bfd,
1606 symtab_hdr->sh_link,
1611 name = bfd_section_name (input_bfd, sec);
1614 if (r == bfd_reloc_overflow)
1616 if (!(info->callbacks->reloc_overflow
1617 (info, (h ? &h->root : NULL), name, howto->name,
1618 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1623 (*_bfd_error_handler)
1624 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1625 input_bfd, input_section,
1626 (long) rel->r_offset, name, (int) r);
1636 bfin_gc_mark_hook (asection * sec,
1637 struct bfd_link_info *info,
1638 Elf_Internal_Rela * rel,
1639 struct elf_link_hash_entry *h,
1640 Elf_Internal_Sym * sym)
1643 switch (ELF32_R_TYPE (rel->r_info))
1645 case R_BFIN_GNU_VTINHERIT:
1646 case R_BFIN_GNU_VTENTRY:
1650 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1653 /* Update the got entry reference counts for the section being removed. */
1656 bfin_gc_sweep_hook (bfd * abfd,
1657 struct bfd_link_info *info,
1659 const Elf_Internal_Rela * relocs)
1661 Elf_Internal_Shdr *symtab_hdr;
1662 struct elf_link_hash_entry **sym_hashes;
1663 bfd_signed_vma *local_got_refcounts;
1664 const Elf_Internal_Rela *rel, *relend;
1669 dynobj = elf_hash_table (info)->dynobj;
1673 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1674 sym_hashes = elf_sym_hashes (abfd);
1675 local_got_refcounts = elf_local_got_refcounts (abfd);
1677 sgot = bfd_get_section_by_name (dynobj, ".got");
1678 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1680 relend = relocs + sec->reloc_count;
1681 for (rel = relocs; rel < relend; rel++)
1683 unsigned long r_symndx;
1684 struct elf_link_hash_entry *h;
1686 switch (ELF32_R_TYPE (rel->r_info))
1689 r_symndx = ELF32_R_SYM (rel->r_info);
1690 if (r_symndx >= symtab_hdr->sh_info)
1692 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1693 if (h->got.refcount > 0)
1696 if (h->got.refcount == 0)
1698 /* We don't need the .got entry any more. */
1700 srelgot->size -= sizeof (Elf32_External_Rela);
1704 else if (local_got_refcounts != NULL)
1706 if (local_got_refcounts[r_symndx] > 0)
1708 --local_got_refcounts[r_symndx];
1709 if (local_got_refcounts[r_symndx] == 0)
1711 /* We don't need the .got entry any more. */
1714 srelgot->size -= sizeof (Elf32_External_Rela);
1726 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1727 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1729 /* An extension of the elf hash table data structure,
1730 containing some additional Blackfin-specific data. */
1731 struct bfinfdpic_elf_link_hash_table
1733 struct elf_link_hash_table elf;
1735 /* A pointer to the .got section. */
1737 /* A pointer to the .rel.got section. */
1739 /* A pointer to the .rofixup section. */
1740 asection *sgotfixup;
1741 /* A pointer to the .plt section. */
1743 /* A pointer to the .rel.plt section. */
1745 /* GOT base offset. */
1747 /* Location of the first non-lazy PLT entry, i.e., the number of
1748 bytes taken by lazy PLT entries. */
1750 /* A hash table holding information about which symbols were
1751 referenced with which PIC-related relocations. */
1752 struct htab *relocs_info;
1753 /* Summary reloc information collected by
1754 _bfinfdpic_count_got_plt_entries. */
1755 struct _bfinfdpic_dynamic_got_info *g;
1758 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1760 #define bfinfdpic_hash_table(info) \
1761 (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \
1762 == BFIN_ELF_DATA ? ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash)) : NULL)
1764 #define bfinfdpic_got_section(info) \
1765 (bfinfdpic_hash_table (info)->sgot)
1766 #define bfinfdpic_gotrel_section(info) \
1767 (bfinfdpic_hash_table (info)->sgotrel)
1768 #define bfinfdpic_gotfixup_section(info) \
1769 (bfinfdpic_hash_table (info)->sgotfixup)
1770 #define bfinfdpic_plt_section(info) \
1771 (bfinfdpic_hash_table (info)->splt)
1772 #define bfinfdpic_pltrel_section(info) \
1773 (bfinfdpic_hash_table (info)->spltrel)
1774 #define bfinfdpic_relocs_info(info) \
1775 (bfinfdpic_hash_table (info)->relocs_info)
1776 #define bfinfdpic_got_initial_offset(info) \
1777 (bfinfdpic_hash_table (info)->got0)
1778 #define bfinfdpic_plt_initial_offset(info) \
1779 (bfinfdpic_hash_table (info)->plt0)
1780 #define bfinfdpic_dynamic_got_plt_info(info) \
1781 (bfinfdpic_hash_table (info)->g)
1783 /* The name of the dynamic interpreter. This is put in the .interp
1786 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1788 #define DEFAULT_STACK_SIZE 0x20000
1790 /* This structure is used to collect the number of entries present in
1791 each addressable range of the got. */
1792 struct _bfinfdpic_dynamic_got_info
1794 /* Several bits of information about the current link. */
1795 struct bfd_link_info *info;
1796 /* Total size needed for GOT entries within the 18- or 32-bit
1798 bfd_vma got17m4, gothilo;
1799 /* Total size needed for function descriptor entries within the 18-
1800 or 32-bit ranges. */
1801 bfd_vma fd17m4, fdhilo;
1802 /* Total size needed function descriptor entries referenced in PLT
1803 entries, that would be profitable to place in offsets close to
1804 the PIC register. */
1806 /* Total size needed by lazy PLT entries. */
1808 /* Number of relocations carried over from input object files. */
1809 unsigned long relocs;
1810 /* Number of fixups introduced by relocations in input object files. */
1811 unsigned long fixups;
1814 /* Create a Blackfin ELF linker hash table. */
1816 static struct bfd_link_hash_table *
1817 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1819 struct bfinfdpic_elf_link_hash_table *ret;
1820 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1822 ret = bfd_zalloc (abfd, amt);
1826 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1827 _bfd_elf_link_hash_newfunc,
1828 sizeof (struct elf_link_hash_entry),
1835 return &ret->elf.root;
1838 /* Decide whether a reference to a symbol can be resolved locally or
1839 not. If the symbol is protected, we want the local address, but
1840 its function descriptor must be assigned by the dynamic linker. */
1841 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1842 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1843 || ! elf_hash_table (INFO)->dynamic_sections_created)
1844 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1845 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1847 /* This structure collects information on what kind of GOT, PLT or
1848 function descriptors are required by relocations that reference a
1850 struct bfinfdpic_relocs_info
1852 /* The index of the symbol, as stored in the relocation r_info, if
1853 we have a local symbol; -1 otherwise. */
1857 /* The input bfd in which the symbol is defined, if it's a local
1860 /* If symndx == -1, the hash table entry corresponding to a global
1861 symbol (even if it turns out to bind locally, in which case it
1862 should ideally be replaced with section's symndx + addend). */
1863 struct elf_link_hash_entry *h;
1865 /* The addend of the relocation that references the symbol. */
1868 /* The fields above are used to identify an entry. The fields below
1869 contain information on how an entry is used and, later on, which
1870 locations it was assigned. */
1871 /* The following 2 fields record whether the symbol+addend above was
1872 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1873 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1876 /* Whether a FUNCDESC relocation references symbol+addend. */
1878 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1881 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1882 unsigned fdgoff17m4;
1883 unsigned fdgoffhilo;
1884 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1885 GOTOFFHI relocations. The addend doesn't really matter, since we
1886 envision that this will only be used to check whether the symbol
1887 is mapped to the same segment as the got. */
1889 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1891 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1894 /* Whether we need a PLT entry for a symbol. Should be implied by
1896 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1898 /* Whether a function descriptor should be created in this link unit
1899 for symbol+addend. Should be implied by something like:
1900 (plt || fdgotoff17m4 || fdgotofflohi
1901 || ((fd || fdgot17m4 || fdgothilo)
1902 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1904 /* Whether a lazy PLT entry is needed for this symbol+addend.
1905 Should be implied by something like:
1906 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1907 && ! (info->flags & DF_BIND_NOW)) */
1909 /* Whether we've already emitted GOT relocations and PLT entries as
1910 needed for this symbol. */
1913 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1914 relocations referencing the symbol. */
1915 unsigned relocs32, relocsfd, relocsfdv;
1917 /* The number of .rofixups entries and dynamic relocations allocated
1918 for this symbol, minus any that might have already been used. */
1919 unsigned fixups, dynrelocs;
1921 /* The offsets of the GOT entries assigned to symbol+addend, to the
1922 function descriptor's address, and to a function descriptor,
1923 respectively. Should be zero if unassigned. The offsets are
1924 counted from the value that will be assigned to the PIC register,
1925 not from the beginning of the .got section. */
1926 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1927 /* The offsets of the PLT entries assigned to symbol+addend,
1928 non-lazy and lazy, respectively. If unassigned, should be
1930 bfd_vma plt_entry, lzplt_entry;
1933 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1935 bfinfdpic_relocs_info_hash (const void *entry_)
1937 const struct bfinfdpic_relocs_info *entry = entry_;
1939 return (entry->symndx == -1
1940 ? (long) entry->d.h->root.root.hash
1941 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1944 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1947 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1949 const struct bfinfdpic_relocs_info *e1 = entry1;
1950 const struct bfinfdpic_relocs_info *e2 = entry2;
1952 return e1->symndx == e2->symndx && e1->addend == e2->addend
1953 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1956 /* Find or create an entry in a hash table HT that matches the key
1957 fields of the given ENTRY. If it's not found, memory for a new
1958 entry is allocated in ABFD's obstack. */
1959 static struct bfinfdpic_relocs_info *
1960 bfinfdpic_relocs_info_find (struct htab *ht,
1962 const struct bfinfdpic_relocs_info *entry,
1963 enum insert_option insert)
1965 struct bfinfdpic_relocs_info **loc;
1970 loc = (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1978 *loc = bfd_zalloc (abfd, sizeof (**loc));
1983 (*loc)->symndx = entry->symndx;
1984 (*loc)->d = entry->d;
1985 (*loc)->addend = entry->addend;
1986 (*loc)->plt_entry = (bfd_vma)-1;
1987 (*loc)->lzplt_entry = (bfd_vma)-1;
1992 /* Obtain the address of the entry in HT associated with H's symbol +
1993 addend, creating a new entry if none existed. ABFD is only used
1994 for memory allocation purposes. */
1995 inline static struct bfinfdpic_relocs_info *
1996 bfinfdpic_relocs_info_for_global (struct htab *ht,
1998 struct elf_link_hash_entry *h,
2000 enum insert_option insert)
2002 struct bfinfdpic_relocs_info entry;
2006 entry.addend = addend;
2008 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2011 /* Obtain the address of the entry in HT associated with the SYMNDXth
2012 local symbol of the input bfd ABFD, plus the addend, creating a new
2013 entry if none existed. */
2014 inline static struct bfinfdpic_relocs_info *
2015 bfinfdpic_relocs_info_for_local (struct htab *ht,
2019 enum insert_option insert)
2021 struct bfinfdpic_relocs_info entry;
2023 entry.symndx = symndx;
2024 entry.d.abfd = abfd;
2025 entry.addend = addend;
2027 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2030 /* Merge fields set by check_relocs() of two entries that end up being
2031 mapped to the same (presumably global) symbol. */
2034 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2035 struct bfinfdpic_relocs_info const *e1)
2037 e2->got17m4 |= e1->got17m4;
2038 e2->gothilo |= e1->gothilo;
2040 e2->fdgot17m4 |= e1->fdgot17m4;
2041 e2->fdgothilo |= e1->fdgothilo;
2042 e2->fdgoff17m4 |= e1->fdgoff17m4;
2043 e2->fdgoffhilo |= e1->fdgoffhilo;
2044 e2->gotoff |= e1->gotoff;
2045 e2->call |= e1->call;
2049 /* Every block of 65535 lazy PLT entries shares a single call to the
2050 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2051 32767, counting from 0). All other lazy PLT entries branch to it
2052 in a single instruction. */
2054 #define LZPLT_RESOLVER_EXTRA 10
2055 #define LZPLT_NORMAL_SIZE 6
2056 #define LZPLT_ENTRIES 1362
2058 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2059 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2061 /* Add a dynamic relocation to the SRELOC section. */
2063 inline static bfd_vma
2064 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2065 int reloc_type, long dynindx, bfd_vma addend,
2066 struct bfinfdpic_relocs_info *entry)
2068 Elf_Internal_Rela outrel;
2069 bfd_vma reloc_offset;
2071 outrel.r_offset = offset;
2072 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2073 outrel.r_addend = addend;
2075 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2076 BFD_ASSERT (reloc_offset < sreloc->size);
2077 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2078 sreloc->contents + reloc_offset);
2079 sreloc->reloc_count++;
2081 /* If the entry's index is zero, this relocation was probably to a
2082 linkonce section that got discarded. We reserved a dynamic
2083 relocation, but it was for another entry than the one we got at
2084 the time of emitting the relocation. Unfortunately there's no
2085 simple way for us to catch this situation, since the relocation
2086 is cleared right before calling relocate_section, at which point
2087 we no longer know what the relocation used to point to. */
2090 BFD_ASSERT (entry->dynrelocs > 0);
2094 return reloc_offset;
2097 /* Add a fixup to the ROFIXUP section. */
2100 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2101 struct bfinfdpic_relocs_info *entry)
2103 bfd_vma fixup_offset;
2105 if (rofixup->flags & SEC_EXCLUDE)
2108 fixup_offset = rofixup->reloc_count * 4;
2109 if (rofixup->contents)
2111 BFD_ASSERT (fixup_offset < rofixup->size);
2112 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2114 rofixup->reloc_count++;
2116 if (entry && entry->symndx)
2118 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2120 BFD_ASSERT (entry->fixups > 0);
2124 return fixup_offset;
2127 /* Find the segment number in which OSEC, and output section, is
2131 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2133 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2135 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2138 inline static bfd_boolean
2139 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2141 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2143 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2146 /* Generate relocations for GOT entries, function descriptors, and
2147 code for PLT and lazy PLT entries. */
2149 inline static bfd_boolean
2150 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2152 struct bfd_link_info *info,
2154 Elf_Internal_Sym *sym,
2158 bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
2165 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2167 /* If the symbol is dynamic, consider it for dynamic
2168 relocations, otherwise decay to section + offset. */
2169 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2170 dynindx = entry->d.h->dynindx;
2174 && sec->output_section
2175 && ! bfd_is_abs_section (sec->output_section)
2176 && ! bfd_is_und_section (sec->output_section))
2177 dynindx = elf_section_data (sec->output_section)->dynindx;
2183 /* Generate relocation for GOT entry pointing to the symbol. */
2184 if (entry->got_entry)
2187 bfd_vma ad = addend;
2189 /* If the symbol is dynamic but binds locally, use
2191 if (sec && (entry->symndx != -1
2192 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2194 if (entry->symndx == -1)
2195 ad += entry->d.h->root.u.def.value;
2197 ad += sym->st_value;
2198 ad += sec->output_offset;
2199 if (sec->output_section && elf_section_data (sec->output_section))
2200 idx = elf_section_data (sec->output_section)->dynindx;
2205 /* If we're linking an executable at a fixed address, we can
2206 omit the dynamic relocation as long as the symbol is local to
2208 if (info->executable && !info->pie
2209 && (entry->symndx != -1
2210 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2213 ad += sec->output_section->vma;
2214 if (entry->symndx != -1
2215 || entry->d.h->root.type != bfd_link_hash_undefweak)
2216 _bfinfdpic_add_rofixup (output_bfd,
2217 bfinfdpic_gotfixup_section (info),
2218 bfinfdpic_got_section (info)->output_section
2220 + bfinfdpic_got_section (info)->output_offset
2221 + bfinfdpic_got_initial_offset (info)
2222 + entry->got_entry, entry);
2225 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2226 _bfd_elf_section_offset
2228 bfinfdpic_got_section (info),
2229 bfinfdpic_got_initial_offset (info)
2231 + bfinfdpic_got_section (info)
2232 ->output_section->vma
2233 + bfinfdpic_got_section (info)->output_offset,
2234 R_BFIN_BYTE4_DATA, idx, ad, entry);
2236 bfd_put_32 (output_bfd, ad,
2237 bfinfdpic_got_section (info)->contents
2238 + bfinfdpic_got_initial_offset (info)
2239 + entry->got_entry);
2242 /* Generate relocation for GOT entry pointing to a canonical
2243 function descriptor. */
2244 if (entry->fdgot_entry)
2249 if (! (entry->symndx == -1
2250 && entry->d.h->root.type == bfd_link_hash_undefweak
2251 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2253 /* If the symbol is dynamic and there may be dynamic symbol
2254 resolution because we are, or are linked with, a shared
2255 library, emit a FUNCDESC relocation such that the dynamic
2256 linker will allocate the function descriptor. If the
2257 symbol needs a non-local function descriptor but binds
2258 locally (e.g., its visibility is protected, emit a
2259 dynamic relocation decayed to section+offset. */
2260 if (entry->symndx == -1
2261 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2262 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2263 && !(info->executable && !info->pie))
2265 reloc = R_BFIN_FUNCDESC;
2266 idx = elf_section_data (entry->d.h->root.u.def.section
2267 ->output_section)->dynindx;
2268 ad = entry->d.h->root.u.def.section->output_offset
2269 + entry->d.h->root.u.def.value;
2271 else if (entry->symndx == -1
2272 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2274 reloc = R_BFIN_FUNCDESC;
2282 /* Otherwise, we know we have a private function descriptor,
2283 so reference it directly. */
2284 if (elf_hash_table (info)->dynamic_sections_created)
2285 BFD_ASSERT (entry->privfd);
2286 reloc = R_BFIN_BYTE4_DATA;
2287 idx = elf_section_data (bfinfdpic_got_section (info)
2288 ->output_section)->dynindx;
2289 ad = bfinfdpic_got_section (info)->output_offset
2290 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2293 /* If there is room for dynamic symbol resolution, emit the
2294 dynamic relocation. However, if we're linking an
2295 executable at a fixed location, we won't have emitted a
2296 dynamic symbol entry for the got section, so idx will be
2297 zero, which means we can and should compute the address
2298 of the private descriptor ourselves. */
2299 if (info->executable && !info->pie
2300 && (entry->symndx != -1
2301 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2303 ad += bfinfdpic_got_section (info)->output_section->vma;
2304 _bfinfdpic_add_rofixup (output_bfd,
2305 bfinfdpic_gotfixup_section (info),
2306 bfinfdpic_got_section (info)
2307 ->output_section->vma
2308 + bfinfdpic_got_section (info)
2310 + bfinfdpic_got_initial_offset (info)
2311 + entry->fdgot_entry, entry);
2314 _bfinfdpic_add_dyn_reloc (output_bfd,
2315 bfinfdpic_gotrel_section (info),
2316 _bfd_elf_section_offset
2318 bfinfdpic_got_section (info),
2319 bfinfdpic_got_initial_offset (info)
2320 + entry->fdgot_entry)
2321 + bfinfdpic_got_section (info)
2322 ->output_section->vma
2323 + bfinfdpic_got_section (info)
2325 reloc, idx, ad, entry);
2328 bfd_put_32 (output_bfd, ad,
2329 bfinfdpic_got_section (info)->contents
2330 + bfinfdpic_got_initial_offset (info)
2331 + entry->fdgot_entry);
2334 /* Generate relocation to fill in a private function descriptor in
2336 if (entry->fd_entry)
2339 bfd_vma ad = addend;
2341 long lowword, highword;
2343 /* If the symbol is dynamic but binds locally, use
2345 if (sec && (entry->symndx != -1
2346 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2348 if (entry->symndx == -1)
2349 ad += entry->d.h->root.u.def.value;
2351 ad += sym->st_value;
2352 ad += sec->output_offset;
2353 if (sec->output_section && elf_section_data (sec->output_section))
2354 idx = elf_section_data (sec->output_section)->dynindx;
2359 /* If we're linking an executable at a fixed address, we can
2360 omit the dynamic relocation as long as the symbol is local to
2362 if (info->executable && !info->pie
2363 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2366 ad += sec->output_section->vma;
2368 if (entry->symndx != -1
2369 || entry->d.h->root.type != bfd_link_hash_undefweak)
2371 _bfinfdpic_add_rofixup (output_bfd,
2372 bfinfdpic_gotfixup_section (info),
2373 bfinfdpic_got_section (info)
2374 ->output_section->vma
2375 + bfinfdpic_got_section (info)
2377 + bfinfdpic_got_initial_offset (info)
2378 + entry->fd_entry, entry);
2379 _bfinfdpic_add_rofixup (output_bfd,
2380 bfinfdpic_gotfixup_section (info),
2381 bfinfdpic_got_section (info)
2382 ->output_section->vma
2383 + bfinfdpic_got_section (info)
2385 + bfinfdpic_got_initial_offset (info)
2386 + entry->fd_entry + 4, entry);
2392 = _bfinfdpic_add_dyn_reloc (output_bfd,
2394 ? bfinfdpic_pltrel_section (info)
2395 : bfinfdpic_gotrel_section (info),
2396 _bfd_elf_section_offset
2398 bfinfdpic_got_section (info),
2399 bfinfdpic_got_initial_offset (info)
2401 + bfinfdpic_got_section (info)
2402 ->output_section->vma
2403 + bfinfdpic_got_section (info)
2405 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2408 /* If we've omitted the dynamic relocation, just emit the fixed
2409 addresses of the symbol and of the local GOT base offset. */
2410 if (info->executable && !info->pie && sec && sec->output_section)
2413 highword = bfinfdpic_got_section (info)->output_section->vma
2414 + bfinfdpic_got_section (info)->output_offset
2415 + bfinfdpic_got_initial_offset (info);
2417 else if (entry->lazyplt)
2422 fd_lazy_rel_offset = ofst;
2424 /* A function descriptor used for lazy or local resolving is
2425 initialized such that its high word contains the output
2426 section index in which the PLT entries are located, and
2427 the low word contains the address of the lazy PLT entry
2428 entry point, that must be within the memory region
2429 assigned to that section. */
2430 lowword = entry->lzplt_entry + 4
2431 + bfinfdpic_plt_section (info)->output_offset
2432 + bfinfdpic_plt_section (info)->output_section->vma;
2433 highword = _bfinfdpic_osec_to_segment
2434 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2438 /* A function descriptor for a local function gets the index
2439 of the section. For a non-local function, it's
2443 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2444 && entry->d.h->dynindx == idx))
2447 highword = _bfinfdpic_osec_to_segment
2448 (output_bfd, sec->output_section);
2451 bfd_put_32 (output_bfd, lowword,
2452 bfinfdpic_got_section (info)->contents
2453 + bfinfdpic_got_initial_offset (info)
2455 bfd_put_32 (output_bfd, highword,
2456 bfinfdpic_got_section (info)->contents
2457 + bfinfdpic_got_initial_offset (info)
2458 + entry->fd_entry + 4);
2461 /* Generate code for the PLT entry. */
2462 if (entry->plt_entry != (bfd_vma) -1)
2464 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2467 BFD_ASSERT (entry->fd_entry);
2469 /* Figure out what kind of PLT entry we need, depending on the
2470 location of the function descriptor within the GOT. */
2471 if (entry->fd_entry >= -(1 << (18 - 1))
2472 && entry->fd_entry + 4 < (1 << (18 - 1)))
2474 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2475 bfd_put_32 (output_bfd,
2476 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2478 bfd_put_32 (output_bfd,
2479 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2485 /* P1.L = fd_entry; P1.H = fd_entry;
2489 bfd_put_32 (output_bfd,
2490 0xe109 | (entry->fd_entry << 16),
2492 bfd_put_32 (output_bfd,
2493 0xe149 | (entry->fd_entry & 0xFFFF0000),
2495 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2496 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2497 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2501 bfd_put_16 (output_bfd, 0x0051, plt_code);
2504 /* Generate code for the lazy PLT entry. */
2505 if (entry->lzplt_entry != (bfd_vma) -1)
2507 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2508 + entry->lzplt_entry;
2509 bfd_vma resolverStub_addr;
2511 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2514 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2515 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2516 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2517 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2519 if (entry->lzplt_entry == resolverStub_addr)
2521 /* This is a lazy PLT entry that includes a resolver call.
2525 bfd_put_32 (output_bfd,
2528 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2532 /* JUMP.S resolverStub */
2533 bfd_put_16 (output_bfd,
2535 | (((resolverStub_addr - entry->lzplt_entry)
2536 / 2) & (((bfd_vma)1 << 12) - 1)),
2544 /* Relocate an Blackfin ELF section.
2546 The RELOCATE_SECTION function is called by the new ELF backend linker
2547 to handle the relocations for a section.
2549 The relocs are always passed as Rela structures; if the section
2550 actually uses Rel structures, the r_addend field will always be
2553 This function is responsible for adjusting the section contents as
2554 necessary, and (if using Rela relocs and generating a relocatable
2555 output file) adjusting the reloc addend as necessary.
2557 This function does not have to worry about setting the reloc
2558 address or the reloc symbol index.
2560 LOCAL_SYMS is a pointer to the swapped in local symbols.
2562 LOCAL_SECTIONS is an array giving the section in the input file
2563 corresponding to the st_shndx field of each local symbol.
2565 The global hash table entry for the global symbols can be found
2566 via elf_sym_hashes (input_bfd).
2568 When generating relocatable output, this function must handle
2569 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2570 going to be the section symbol corresponding to the output
2571 section, which means that the addend must be adjusted
2575 bfinfdpic_relocate_section (bfd * output_bfd,
2576 struct bfd_link_info *info,
2578 asection * input_section,
2579 bfd_byte * contents,
2580 Elf_Internal_Rela * relocs,
2581 Elf_Internal_Sym * local_syms,
2582 asection ** local_sections)
2584 Elf_Internal_Shdr *symtab_hdr;
2585 struct elf_link_hash_entry **sym_hashes;
2586 Elf_Internal_Rela *rel;
2587 Elf_Internal_Rela *relend;
2588 unsigned isec_segment, got_segment, plt_segment,
2590 int silence_segment_error = !(info->shared || info->pie);
2592 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2593 sym_hashes = elf_sym_hashes (input_bfd);
2594 relend = relocs + input_section->reloc_count;
2596 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2597 input_section->output_section);
2598 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2599 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2600 bfinfdpic_got_section (info)
2604 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2605 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2606 bfinfdpic_plt_section (info)
2611 for (rel = relocs; rel < relend; rel ++)
2613 reloc_howto_type *howto;
2614 unsigned long r_symndx;
2615 Elf_Internal_Sym *sym;
2617 struct elf_link_hash_entry *h;
2619 bfd_reloc_status_type r;
2620 const char * name = NULL;
2623 struct bfinfdpic_relocs_info *picrel;
2624 bfd_vma orig_addend = rel->r_addend;
2626 r_type = ELF32_R_TYPE (rel->r_info);
2628 if (r_type == R_BFIN_GNU_VTINHERIT
2629 || r_type == R_BFIN_GNU_VTENTRY)
2632 r_symndx = ELF32_R_SYM (rel->r_info);
2633 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2636 bfd_set_error (bfd_error_bad_value);
2644 if (r_symndx < symtab_hdr->sh_info)
2646 sym = local_syms + r_symndx;
2647 osec = sec = local_sections [r_symndx];
2648 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2650 name = bfd_elf_string_from_elf_section
2651 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2652 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2657 bfd_boolean unresolved_reloc;
2659 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2660 r_symndx, symtab_hdr, sym_hashes,
2662 unresolved_reloc, warned);
2666 if (sec != NULL && elf_discarded_section (sec))
2667 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2668 rel, relend, howto, contents);
2670 if (info->relocatable)
2674 && (h->root.type == bfd_link_hash_defined
2675 || h->root.type == bfd_link_hash_defweak)
2676 && !BFINFDPIC_SYM_LOCAL (info, h))
2684 case R_BFIN_PCREL24:
2685 case R_BFIN_PCREL24_JUMP_L:
2686 case R_BFIN_BYTE4_DATA:
2687 if (! IS_FDPIC (output_bfd))
2690 case R_BFIN_GOT17M4:
2693 case R_BFIN_FUNCDESC_GOT17M4:
2694 case R_BFIN_FUNCDESC_GOTHI:
2695 case R_BFIN_FUNCDESC_GOTLO:
2696 case R_BFIN_GOTOFF17M4:
2697 case R_BFIN_GOTOFFHI:
2698 case R_BFIN_GOTOFFLO:
2699 case R_BFIN_FUNCDESC_GOTOFF17M4:
2700 case R_BFIN_FUNCDESC_GOTOFFHI:
2701 case R_BFIN_FUNCDESC_GOTOFFLO:
2702 case R_BFIN_FUNCDESC:
2703 case R_BFIN_FUNCDESC_VALUE:
2705 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2706 (info), input_bfd, h,
2707 orig_addend, INSERT);
2709 /* In order to find the entry we created before, we must
2710 use the original addend, not the one that may have been
2711 modified by _bfd_elf_rela_local_sym(). */
2712 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2713 (info), input_bfd, r_symndx,
2714 orig_addend, INSERT);
2718 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2722 (*_bfd_error_handler)
2723 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2724 input_bfd, input_section, rel->r_offset, name);
2734 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2736 info->callbacks->warning
2737 (info, _("relocation references symbol not defined in the module"),
2738 name, input_bfd, input_section, rel->r_offset);
2746 case R_BFIN_PCREL24:
2747 case R_BFIN_PCREL24_JUMP_L:
2748 check_segment[0] = isec_segment;
2749 if (! IS_FDPIC (output_bfd))
2750 check_segment[1] = isec_segment;
2751 else if (picrel->plt)
2753 relocation = bfinfdpic_plt_section (info)->output_section->vma
2754 + bfinfdpic_plt_section (info)->output_offset
2755 + picrel->plt_entry;
2756 check_segment[1] = plt_segment;
2758 /* We don't want to warn on calls to undefined weak symbols,
2759 as calls to them must be protected by non-NULL tests
2760 anyway, and unprotected calls would invoke undefined
2762 else if (picrel->symndx == -1
2763 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2764 check_segment[1] = check_segment[0];
2766 check_segment[1] = sec
2767 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2771 case R_BFIN_GOT17M4:
2774 relocation = picrel->got_entry;
2775 check_segment[0] = check_segment[1] = got_segment;
2778 case R_BFIN_FUNCDESC_GOT17M4:
2779 case R_BFIN_FUNCDESC_GOTHI:
2780 case R_BFIN_FUNCDESC_GOTLO:
2781 relocation = picrel->fdgot_entry;
2782 check_segment[0] = check_segment[1] = got_segment;
2785 case R_BFIN_GOTOFFHI:
2786 case R_BFIN_GOTOFF17M4:
2787 case R_BFIN_GOTOFFLO:
2788 relocation -= bfinfdpic_got_section (info)->output_section->vma
2789 + bfinfdpic_got_section (info)->output_offset
2790 + bfinfdpic_got_initial_offset (info);
2791 check_segment[0] = got_segment;
2792 check_segment[1] = sec
2793 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2797 case R_BFIN_FUNCDESC_GOTOFF17M4:
2798 case R_BFIN_FUNCDESC_GOTOFFHI:
2799 case R_BFIN_FUNCDESC_GOTOFFLO:
2800 relocation = picrel->fd_entry;
2801 check_segment[0] = check_segment[1] = got_segment;
2804 case R_BFIN_FUNCDESC:
2807 bfd_vma addend = rel->r_addend;
2809 if (! (h && h->root.type == bfd_link_hash_undefweak
2810 && BFINFDPIC_SYM_LOCAL (info, h)))
2812 /* If the symbol is dynamic and there may be dynamic
2813 symbol resolution because we are or are linked with a
2814 shared library, emit a FUNCDESC relocation such that
2815 the dynamic linker will allocate the function
2816 descriptor. If the symbol needs a non-local function
2817 descriptor but binds locally (e.g., its visibility is
2818 protected, emit a dynamic relocation decayed to
2820 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2821 && BFINFDPIC_SYM_LOCAL (info, h)
2822 && !(info->executable && !info->pie))
2824 dynindx = elf_section_data (h->root.u.def.section
2825 ->output_section)->dynindx;
2826 addend += h->root.u.def.section->output_offset
2827 + h->root.u.def.value;
2829 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2833 info->callbacks->warning
2834 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2835 name, input_bfd, input_section, rel->r_offset);
2838 dynindx = h->dynindx;
2842 /* Otherwise, we know we have a private function
2843 descriptor, so reference it directly. */
2844 BFD_ASSERT (picrel->privfd);
2845 r_type = R_BFIN_BYTE4_DATA;
2846 dynindx = elf_section_data (bfinfdpic_got_section (info)
2847 ->output_section)->dynindx;
2848 addend = bfinfdpic_got_section (info)->output_offset
2849 + bfinfdpic_got_initial_offset (info)
2853 /* If there is room for dynamic symbol resolution, emit
2854 the dynamic relocation. However, if we're linking an
2855 executable at a fixed location, we won't have emitted a
2856 dynamic symbol entry for the got section, so idx will
2857 be zero, which means we can and should compute the
2858 address of the private descriptor ourselves. */
2859 if (info->executable && !info->pie
2860 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2864 addend += bfinfdpic_got_section (info)->output_section->vma;
2865 if ((bfd_get_section_flags (output_bfd,
2866 input_section->output_section)
2867 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2869 if (_bfinfdpic_osec_readonly_p (output_bfd,
2873 info->callbacks->warning
2875 _("cannot emit fixups in read-only section"),
2876 name, input_bfd, input_section, rel->r_offset);
2880 offset = _bfd_elf_section_offset
2882 input_section, rel->r_offset);
2884 if (offset != (bfd_vma)-1)
2885 _bfinfdpic_add_rofixup (output_bfd,
2886 bfinfdpic_gotfixup_section
2888 offset + input_section
2889 ->output_section->vma
2890 + input_section->output_offset,
2894 else if ((bfd_get_section_flags (output_bfd,
2895 input_section->output_section)
2896 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2900 if (_bfinfdpic_osec_readonly_p (output_bfd,
2904 info->callbacks->warning
2906 _("cannot emit dynamic relocations in read-only section"),
2907 name, input_bfd, input_section, rel->r_offset);
2910 offset = _bfd_elf_section_offset (output_bfd, info,
2911 input_section, rel->r_offset);
2913 if (offset != (bfd_vma)-1)
2914 _bfinfdpic_add_dyn_reloc (output_bfd,
2915 bfinfdpic_gotrel_section (info),
2916 offset + input_section
2917 ->output_section->vma
2918 + input_section->output_offset,
2920 dynindx, addend, picrel);
2923 addend += bfinfdpic_got_section (info)->output_section->vma;
2926 /* We want the addend in-place because dynamic
2927 relocations are REL. Setting relocation to it should
2928 arrange for it to be installed. */
2929 relocation = addend - rel->r_addend;
2931 check_segment[0] = check_segment[1] = got_segment;
2934 case R_BFIN_BYTE4_DATA:
2935 if (! IS_FDPIC (output_bfd))
2937 check_segment[0] = check_segment[1] = -1;
2941 case R_BFIN_FUNCDESC_VALUE:
2944 bfd_vma addend = rel->r_addend;
2946 offset = _bfd_elf_section_offset (output_bfd, info,
2947 input_section, rel->r_offset);
2949 /* If the symbol is dynamic but binds locally, use
2951 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2953 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2955 info->callbacks->warning
2956 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2957 name, input_bfd, input_section, rel->r_offset);
2960 dynindx = h->dynindx;
2965 addend += h->root.u.def.value;
2967 addend += sym->st_value;
2969 addend += osec->output_offset;
2970 if (osec && osec->output_section
2971 && ! bfd_is_abs_section (osec->output_section)
2972 && ! bfd_is_und_section (osec->output_section))
2973 dynindx = elf_section_data (osec->output_section)->dynindx;
2978 /* If we're linking an executable at a fixed address, we
2979 can omit the dynamic relocation as long as the symbol
2980 is defined in the current link unit (which is implied
2981 by its output section not being NULL). */
2982 if (info->executable && !info->pie
2983 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2986 addend += osec->output_section->vma;
2987 if (IS_FDPIC (input_bfd)
2988 && (bfd_get_section_flags (output_bfd,
2989 input_section->output_section)
2990 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2992 if (_bfinfdpic_osec_readonly_p (output_bfd,
2996 info->callbacks->warning
2998 _("cannot emit fixups in read-only section"),
2999 name, input_bfd, input_section, rel->r_offset);
3002 if (!h || h->root.type != bfd_link_hash_undefweak)
3004 if (offset != (bfd_vma)-1)
3006 _bfinfdpic_add_rofixup (output_bfd,
3007 bfinfdpic_gotfixup_section
3009 offset + input_section
3010 ->output_section->vma
3011 + input_section->output_offset,
3014 if (r_type == R_BFIN_FUNCDESC_VALUE)
3015 _bfinfdpic_add_rofixup
3017 bfinfdpic_gotfixup_section (info),
3018 offset + input_section->output_section->vma
3019 + input_section->output_offset + 4, picrel);
3026 if ((bfd_get_section_flags (output_bfd,
3027 input_section->output_section)
3028 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3030 if (_bfinfdpic_osec_readonly_p (output_bfd,
3034 info->callbacks->warning
3036 _("cannot emit dynamic relocations in read-only section"),
3037 name, input_bfd, input_section, rel->r_offset);
3041 if (offset != (bfd_vma)-1)
3042 _bfinfdpic_add_dyn_reloc (output_bfd,
3043 bfinfdpic_gotrel_section (info),
3045 + input_section->output_section->vma
3046 + input_section->output_offset,
3047 r_type, dynindx, addend, picrel);
3050 addend += osec->output_section->vma;
3051 /* We want the addend in-place because dynamic
3052 relocations are REL. Setting relocation to it
3053 should arrange for it to be installed. */
3054 relocation = addend - rel->r_addend;
3057 if (r_type == R_BFIN_FUNCDESC_VALUE)
3059 /* If we've omitted the dynamic relocation, just emit
3060 the fixed addresses of the symbol and of the local
3062 if (info->executable && !info->pie
3063 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3064 bfd_put_32 (output_bfd,
3065 bfinfdpic_got_section (info)->output_section->vma
3066 + bfinfdpic_got_section (info)->output_offset
3067 + bfinfdpic_got_initial_offset (info),
3068 contents + rel->r_offset + 4);
3070 /* A function descriptor used for lazy or local
3071 resolving is initialized such that its high word
3072 contains the output section index in which the
3073 PLT entries are located, and the low word
3074 contains the offset of the lazy PLT entry entry
3075 point into that section. */
3076 bfd_put_32 (output_bfd,
3077 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3079 : _bfinfdpic_osec_to_segment (output_bfd,
3082 contents + rel->r_offset + 4);
3085 check_segment[0] = check_segment[1] = got_segment;
3089 check_segment[0] = isec_segment;
3090 check_segment[1] = sec
3091 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3096 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3098 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3099 in the ld testsuite. */
3100 /* This helps catch problems in GCC while we can't do more
3101 than static linking. The idea is to test whether the
3102 input file basename is crt0.o only once. */
3103 if (silence_segment_error == 1)
3104 silence_segment_error =
3105 (strlen (input_bfd->filename) == 6
3106 && filename_cmp (input_bfd->filename, "crt0.o") == 0)
3107 || (strlen (input_bfd->filename) > 6
3108 && filename_cmp (input_bfd->filename
3109 + strlen (input_bfd->filename) - 7,
3113 if (!silence_segment_error
3114 /* We don't want duplicate errors for undefined
3116 && !(picrel && picrel->symndx == -1
3117 && picrel->d.h->root.type == bfd_link_hash_undefined))
3118 info->callbacks->warning
3120 (info->shared || info->pie)
3121 ? _("relocations between different segments are not supported")
3122 : _("warning: relocation references a different segment"),
3123 name, input_bfd, input_section, rel->r_offset);
3124 if (!silence_segment_error && (info->shared || info->pie))
3126 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3131 case R_BFIN_GOTOFFHI:
3132 /* We need the addend to be applied before we shift the
3134 relocation += rel->r_addend;
3137 case R_BFIN_FUNCDESC_GOTHI:
3138 case R_BFIN_FUNCDESC_GOTOFFHI:
3143 case R_BFIN_FUNCDESC_GOTLO:
3144 case R_BFIN_GOTOFFLO:
3145 case R_BFIN_FUNCDESC_GOTOFFLO:
3146 relocation &= 0xffff;
3155 case R_BFIN_PCREL24:
3156 case R_BFIN_PCREL24_JUMP_L:
3157 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3161 /* When referencing a GOT entry, a function descriptor or a
3162 PLT, we don't want the addend to apply to the reference,
3163 but rather to the referenced symbol. The actual entry
3164 will have already been created taking the addend into
3165 account, so cancel it out here. */
3166 case R_BFIN_GOT17M4:
3169 case R_BFIN_FUNCDESC_GOT17M4:
3170 case R_BFIN_FUNCDESC_GOTHI:
3171 case R_BFIN_FUNCDESC_GOTLO:
3172 case R_BFIN_FUNCDESC_GOTOFF17M4:
3173 case R_BFIN_FUNCDESC_GOTOFFHI:
3174 case R_BFIN_FUNCDESC_GOTOFFLO:
3175 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3176 here, since we do want to apply the addend to the others.
3177 Note that we've applied the addend to GOTOFFHI before we
3178 shifted it right. */
3179 case R_BFIN_GOTOFFHI:
3180 relocation -= rel->r_addend;
3187 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3188 contents, rel->r_offset,
3189 relocation, rel->r_addend);
3191 if (r != bfd_reloc_ok)
3193 const char * msg = (const char *) NULL;
3197 case bfd_reloc_overflow:
3198 r = info->callbacks->reloc_overflow
3199 (info, (h ? &h->root : NULL), name, howto->name,
3200 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3203 case bfd_reloc_undefined:
3204 r = info->callbacks->undefined_symbol
3205 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3208 case bfd_reloc_outofrange:
3209 msg = _("internal error: out of range error");
3212 case bfd_reloc_notsupported:
3213 msg = _("internal error: unsupported relocation error");
3216 case bfd_reloc_dangerous:
3217 msg = _("internal error: dangerous relocation");
3221 msg = _("internal error: unknown error");
3226 r = info->callbacks->warning
3227 (info, msg, name, input_bfd, input_section, rel->r_offset);
3237 /* Update the relocation information for the relocations of the section
3241 bfinfdpic_gc_sweep_hook (bfd *abfd,
3242 struct bfd_link_info *info,
3244 const Elf_Internal_Rela *relocs)
3246 Elf_Internal_Shdr *symtab_hdr;
3247 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3248 const Elf_Internal_Rela *rel;
3249 const Elf_Internal_Rela *rel_end;
3250 struct bfinfdpic_relocs_info *picrel;
3252 BFD_ASSERT (IS_FDPIC (abfd));
3254 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3255 sym_hashes = elf_sym_hashes (abfd);
3256 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3257 if (!elf_bad_symtab (abfd))
3258 sym_hashes_end -= symtab_hdr->sh_info;
3260 rel_end = relocs + sec->reloc_count;
3261 for (rel = relocs; rel < rel_end; rel++)
3263 struct elf_link_hash_entry *h;
3264 unsigned long r_symndx;
3266 r_symndx = ELF32_R_SYM (rel->r_info);
3267 if (r_symndx < symtab_hdr->sh_info)
3270 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3273 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3275 rel->r_addend, NO_INSERT);
3277 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3278 (info), abfd, r_symndx,
3279 rel->r_addend, NO_INSERT);
3284 switch (ELF32_R_TYPE (rel->r_info))
3286 case R_BFIN_PCREL24:
3287 case R_BFIN_PCREL24_JUMP_L:
3291 case R_BFIN_FUNCDESC_VALUE:
3292 picrel->relocsfdv--;
3293 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3297 case R_BFIN_BYTE4_DATA:
3299 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3303 case R_BFIN_GOT17M4:
3312 case R_BFIN_FUNCDESC_GOT17M4:
3313 picrel->fdgot17m4--;
3316 case R_BFIN_FUNCDESC_GOTHI:
3317 case R_BFIN_FUNCDESC_GOTLO:
3318 picrel->fdgothilo--;
3321 case R_BFIN_GOTOFF17M4:
3322 case R_BFIN_GOTOFFHI:
3323 case R_BFIN_GOTOFFLO:
3327 case R_BFIN_FUNCDESC_GOTOFF17M4:
3328 picrel->fdgoff17m4--;
3331 case R_BFIN_FUNCDESC_GOTOFFHI:
3332 case R_BFIN_FUNCDESC_GOTOFFLO:
3333 picrel->fdgoffhilo--;
3336 case R_BFIN_FUNCDESC:
3349 /* We need dynamic symbols for every section, since segments can
3350 relocate independently. */
3352 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3353 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3356 switch (elf_section_data (p)->this_hdr.sh_type)
3360 /* If sh_type is yet undecided, assume it could be
3361 SHT_PROGBITS/SHT_NOBITS. */
3365 /* There shouldn't be section relative relocations
3366 against any other section. */
3372 /* Create a .got section, as well as its additional info field. This
3373 is almost entirely copied from
3374 elflink.c:_bfd_elf_create_got_section(). */
3377 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3379 flagword flags, pltflags;
3381 struct elf_link_hash_entry *h;
3382 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3385 /* This function may be called more than once. */
3386 s = bfd_get_section_by_name (abfd, ".got");
3387 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3390 /* Machine specific: although pointers are 32-bits wide, we want the
3391 GOT to be aligned to a 64-bit boundary, such that function
3392 descriptors in it can be accessed with 64-bit loads and
3396 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3397 | SEC_LINKER_CREATED);
3400 s = bfd_make_section_with_flags (abfd, ".got", flags);
3402 || !bfd_set_section_alignment (abfd, s, ptralign))
3405 if (bed->want_got_plt)
3407 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3409 || !bfd_set_section_alignment (abfd, s, ptralign))
3413 if (bed->want_got_sym)
3415 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3416 (or .got.plt) section. We don't do this in the linker script
3417 because we don't want to define the symbol if we are not creating
3418 a global offset table. */
3419 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3420 elf_hash_table (info)->hgot = h;
3424 /* Machine-specific: we want the symbol for executables as
3426 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3430 /* The first bit of the global offset table is the header. */
3431 s->size += bed->got_header_size;
3433 /* This is the machine-specific part. Create and initialize section
3434 data for the got. */
3435 if (IS_FDPIC (abfd))
3437 bfinfdpic_got_section (info) = s;
3438 bfinfdpic_relocs_info (info) = htab_try_create (1,
3439 bfinfdpic_relocs_info_hash,
3440 bfinfdpic_relocs_info_eq,
3442 if (! bfinfdpic_relocs_info (info))
3445 s = bfd_make_section_with_flags (abfd, ".rel.got",
3446 (flags | SEC_READONLY));
3448 || ! bfd_set_section_alignment (abfd, s, 2))
3451 bfinfdpic_gotrel_section (info) = s;
3453 /* Machine-specific. */
3454 s = bfd_make_section_with_flags (abfd, ".rofixup",
3455 (flags | SEC_READONLY));
3457 || ! bfd_set_section_alignment (abfd, s, 2))
3460 bfinfdpic_gotfixup_section (info) = s;
3463 pltflags |= SEC_CODE;
3464 if (bed->plt_not_loaded)
3465 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3466 if (bed->plt_readonly)
3467 pltflags |= SEC_READONLY;
3469 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
3471 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3473 /* Blackfin-specific: remember it. */
3474 bfinfdpic_plt_section (info) = s;
3476 if (bed->want_plt_sym)
3478 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3480 struct bfd_link_hash_entry *bh = NULL;
3482 if (! (_bfd_generic_link_add_one_symbol
3483 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3484 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3486 h = (struct elf_link_hash_entry *) bh;
3488 h->type = STT_OBJECT;
3490 if (! info->executable
3491 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3495 /* Blackfin-specific: we want rel relocations for the plt. */
3496 s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY);
3498 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3500 /* Blackfin-specific: remember it. */
3501 bfinfdpic_pltrel_section (info) = s;
3506 /* Make sure the got and plt sections exist, and that our pointers in
3507 the link hash table point to them. */
3510 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3512 /* This is mostly copied from
3513 elflink.c:_bfd_elf_create_dynamic_sections(). */
3516 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3518 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3519 | SEC_LINKER_CREATED);
3521 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3522 .rel[a].bss sections. */
3524 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3525 if (! _bfin_create_got_section (abfd, info))
3528 /* Blackfin-specific: make sure we created everything we wanted. */
3529 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3530 /* && bfinfdpic_gotfixup_section (info) */
3531 && bfinfdpic_plt_section (info)
3532 && bfinfdpic_pltrel_section (info));
3534 if (bed->want_dynbss)
3536 /* The .dynbss section is a place to put symbols which are defined
3537 by dynamic objects, are referenced by regular objects, and are
3538 not functions. We must allocate space for them in the process
3539 image and use a R_*_COPY reloc to tell the dynamic linker to
3540 initialize them at run time. The linker script puts the .dynbss
3541 section into the .bss section of the final image. */
3542 s = bfd_make_section_with_flags (abfd, ".dynbss",
3543 SEC_ALLOC | SEC_LINKER_CREATED);
3547 /* The .rel[a].bss section holds copy relocs. This section is not
3548 normally needed. We need to create it here, though, so that the
3549 linker will map it to an output section. We can't just create it
3550 only if we need it, because we will not know whether we need it
3551 until we have seen all the input files, and the first time the
3552 main linker code calls BFD after examining all the input files
3553 (size_dynamic_sections) the input sections have already been
3554 mapped to the output sections. If the section turns out not to
3555 be needed, we can discard it later. We will never need this
3556 section when generating a shared object, since they do not use
3560 s = bfd_make_section_with_flags (abfd,
3562 flags | SEC_READONLY);
3564 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3572 /* Compute the total GOT size required by each symbol in each range.
3573 Symbols may require up to 4 words in the GOT: an entry pointing to
3574 the symbol, an entry pointing to its function descriptor, and a
3575 private function descriptors taking two words. */
3578 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3579 struct _bfinfdpic_dynamic_got_info *dinfo)
3581 /* Allocate space for a GOT entry pointing to the symbol. */
3583 dinfo->got17m4 += 4;
3584 else if (entry->gothilo)
3585 dinfo->gothilo += 4;
3590 /* Allocate space for a GOT entry pointing to the function
3592 if (entry->fdgot17m4)
3593 dinfo->got17m4 += 4;
3594 else if (entry->fdgothilo)
3595 dinfo->gothilo += 4;
3600 /* Decide whether we need a PLT entry, a function descriptor in the
3601 GOT, and a lazy PLT entry for this symbol. */
3602 entry->plt = entry->call
3603 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3604 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3605 entry->privfd = entry->plt
3606 || entry->fdgoff17m4 || entry->fdgoffhilo
3607 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3608 && (entry->symndx != -1
3609 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3610 entry->lazyplt = entry->privfd
3611 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3612 && ! (dinfo->info->flags & DF_BIND_NOW)
3613 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3615 /* Allocate space for a function descriptor. */
3616 if (entry->fdgoff17m4)
3618 else if (entry->privfd && entry->plt)
3620 else if (entry->privfd)
3627 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3630 /* Compute the number of dynamic relocations and fixups that a symbol
3631 requires, and add (or subtract) from the grand and per-symbol
3635 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3636 struct _bfinfdpic_dynamic_got_info *dinfo,
3637 bfd_boolean subtract)
3639 bfd_vma relocs = 0, fixups = 0;
3641 if (!dinfo->info->executable || dinfo->info->pie)
3642 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3645 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3647 if (entry->symndx != -1
3648 || entry->d.h->root.type != bfd_link_hash_undefweak)
3649 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3652 relocs += entry->relocs32 + entry->relocsfdv;
3654 if (entry->symndx != -1
3655 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3657 if (entry->symndx != -1
3658 || entry->d.h->root.type != bfd_link_hash_undefweak)
3659 fixups += entry->relocsfd;
3662 relocs += entry->relocsfd;
3671 entry->dynrelocs += relocs;
3672 entry->fixups += fixups;
3673 dinfo->relocs += relocs;
3674 dinfo->fixups += fixups;
3677 /* Compute the total GOT and PLT size required by each symbol in each range. *
3678 Symbols may require up to 4 words in the GOT: an entry pointing to
3679 the symbol, an entry pointing to its function descriptor, and a
3680 private function descriptors taking two words. */
3683 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3685 struct bfinfdpic_relocs_info *entry = *entryp;
3686 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3688 _bfinfdpic_count_nontls_entries (entry, dinfo);
3690 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3695 /* This structure is used to assign offsets to got entries, function
3696 descriptors, plt entries and lazy plt entries. */
3698 struct _bfinfdpic_dynamic_got_plt_info
3700 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3701 struct _bfinfdpic_dynamic_got_info g;
3703 /* For each addressable range, we record a MAX (positive) and MIN
3704 (negative) value. CUR is used to assign got entries, and it's
3705 incremented from an initial positive value to MAX, then from MIN
3706 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3707 assign function descriptors, and it's decreased from an initial
3708 non-positive value to MIN, then from MAX down to CUR (unless CUR
3709 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3710 to even words. ODD, if non-zero, indicates an odd word to be
3711 used for the next got entry, otherwise CUR is used and
3712 incremented by a pair of words, wrapping around when it reaches
3713 MAX. FDCUR is decremented (and wrapped) before the next function
3714 descriptor is chosen. FDPLT indicates the number of remaining
3715 slots that can be used for function descriptors used only by PLT
3717 struct _bfinfdpic_dynamic_got_alloc_data
3719 bfd_signed_vma max, cur, odd, fdcur, min;
3724 /* Determine the positive and negative ranges to be used by each
3725 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3726 double-word boundary, are the minimum (negative) and maximum
3727 (positive) GOT offsets already used by previous ranges, except for
3728 an ODD entry that may have been left behind. GOT and FD indicate
3729 the size of GOT entries and function descriptors that must be
3730 placed within the range from -WRAP to WRAP. If there's room left,
3731 up to FDPLT bytes should be reserved for additional function
3734 inline static bfd_signed_vma
3735 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3736 bfd_signed_vma fdcur,
3744 bfd_signed_vma wrapmin = -wrap;
3746 /* Start at the given initial points. */
3750 /* If we had an incoming odd word and we have any got entries that
3751 are going to use it, consume it, otherwise leave gad->odd at
3752 zero. We might force gad->odd to zero and return the incoming
3753 odd such that it is used by the next range, but then GOT entries
3754 might appear to be out of order and we wouldn't be able to
3755 shorten the GOT by one word if it turns out to end with an
3756 unpaired GOT entry. */
3766 /* If we're left with an unpaired GOT entry, compute its location
3767 such that we can return it. Otherwise, if got doesn't require an
3768 odd number of words here, either odd was already zero in the
3769 block above, or it was set to zero because got was non-zero, or
3770 got was already zero. In the latter case, we want the value of
3771 odd to carry over to the return statement, so we don't want to
3772 reset odd unless the condition below is true. */
3779 /* Compute the tentative boundaries of this range. */
3780 gad->max = cur + got;
3781 gad->min = fdcur - fd;
3784 /* If function descriptors took too much space, wrap some of them
3786 if (gad->min < wrapmin)
3788 gad->max += wrapmin - gad->min;
3791 /* If there is space left and we have function descriptors
3792 referenced in PLT entries that could take advantage of shorter
3793 offsets, place them here. */
3794 else if (fdplt && gad->min > wrapmin)
3797 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3798 fds = gad->min - wrapmin;
3807 /* If GOT entries took too much space, wrap some of them around.
3808 This may well cause gad->min to become lower than wrapmin. This
3809 will cause a relocation overflow later on, so we don't have to
3811 if ((bfd_vma) gad->max > wrap)
3813 gad->min -= gad->max - wrap;
3816 /* If there is more space left, try to place some more function
3817 descriptors for PLT entries. */
3818 else if (fdplt && (bfd_vma) gad->max < wrap)
3821 if ((bfd_vma) (wrap - gad->max) < fdplt)
3822 fds = wrap - gad->max;
3831 /* If odd was initially computed as an offset past the wrap point,
3834 odd = gad->min + odd - gad->max;
3836 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3837 before returning, so do it here too. This guarantees that,
3838 should cur and fdcur meet at the wrap point, they'll both be
3840 if (gad->cur == gad->max)
3841 gad->cur = gad->min;
3846 /* Compute the location of the next GOT entry, given the allocation
3847 data for a range. */
3849 inline static bfd_signed_vma
3850 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3856 /* If there was an odd word left behind, use it. */
3862 /* Otherwise, use the word pointed to by cur, reserve the next
3863 as an odd word, and skip to the next pair of words, possibly
3866 gad->odd = gad->cur + 4;
3868 if (gad->cur == gad->max)
3869 gad->cur = gad->min;
3875 /* Compute the location of the next function descriptor entry in the
3876 GOT, given the allocation data for a range. */
3878 inline static bfd_signed_vma
3879 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3881 /* If we're at the bottom, wrap around, and only then allocate the
3882 next pair of words. */
3883 if (gad->fdcur == gad->min)
3884 gad->fdcur = gad->max;
3885 return gad->fdcur -= 8;
3888 /* Assign GOT offsets for every GOT entry and function descriptor.
3889 Doing everything in a single pass is tricky. */
3892 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3894 struct bfinfdpic_relocs_info *entry = *entryp;
3895 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3898 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3899 else if (entry->gothilo)
3900 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3902 if (entry->fdgot17m4)
3903 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3904 else if (entry->fdgothilo)
3905 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3907 if (entry->fdgoff17m4)
3908 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3909 else if (entry->plt && dinfo->got17m4.fdplt)
3911 dinfo->got17m4.fdplt -= 8;
3912 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3914 else if (entry->plt)
3916 dinfo->gothilo.fdplt -= 8;
3917 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3919 else if (entry->privfd)
3920 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3925 /* Assign GOT offsets to private function descriptors used by PLT
3926 entries (or referenced by 32-bit offsets), as well as PLT entries
3927 and lazy PLT entries. */
3930 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3932 struct bfinfdpic_relocs_info *entry = *entryp;
3933 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3935 /* If this symbol requires a local function descriptor, allocate
3937 if (entry->privfd && entry->fd_entry == 0)
3939 if (dinfo->got17m4.fdplt)
3941 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3942 dinfo->got17m4.fdplt -= 8;
3946 BFD_ASSERT (dinfo->gothilo.fdplt);
3947 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3948 dinfo->gothilo.fdplt -= 8;
3956 /* We use the section's raw size to mark the location of the
3958 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3960 /* Figure out the length of this PLT entry based on the
3961 addressing mode we need to reach the function descriptor. */
3962 BFD_ASSERT (entry->fd_entry);
3963 if (entry->fd_entry >= -(1 << (18 - 1))
3964 && entry->fd_entry + 4 < (1 << (18 - 1)))
3969 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3974 entry->lzplt_entry = dinfo->g.lzplt;
3975 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3976 /* If this entry is the one that gets the resolver stub, account
3977 for the additional instruction. */
3978 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3979 == BFINFDPIC_LZPLT_RESOLV_LOC)
3980 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3986 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3987 _bfinfdpic_assign_plt_entries. */
3990 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
3992 struct bfinfdpic_relocs_info *entry = *entryp;
3994 entry->got_entry = 0;
3995 entry->fdgot_entry = 0;
3996 entry->fd_entry = 0;
3997 entry->plt_entry = (bfd_vma)-1;
3998 entry->lzplt_entry = (bfd_vma)-1;
4003 /* Follow indirect and warning hash entries so that each got entry
4004 points to the final symbol definition. P must point to a pointer
4005 to the hash table we're traversing. Since this traversal may
4006 modify the hash table, we set this pointer to NULL to indicate
4007 we've made a potentially-destructive change to the hash table, so
4008 the traversal must be restarted. */
4010 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4012 struct bfinfdpic_relocs_info *entry = *entryp;
4015 if (entry->symndx == -1)
4017 struct elf_link_hash_entry *h = entry->d.h;
4018 struct bfinfdpic_relocs_info *oentry;
4020 while (h->root.type == bfd_link_hash_indirect
4021 || h->root.type == bfd_link_hash_warning)
4022 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4024 if (entry->d.h == h)
4027 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4032 /* Merge the two entries. */
4033 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4034 htab_clear_slot (*htab, entryp);
4040 /* If we can't find this entry with the new bfd hash, re-insert
4041 it, and get the traversal restarted. */
4042 if (! htab_find (*htab, entry))
4044 htab_clear_slot (*htab, entryp);
4045 entryp = htab_find_slot (*htab, entry, INSERT);
4048 /* Abort the traversal, since the whole table may have
4049 moved, and leave it up to the parent to restart the
4051 *(htab_t *)p = NULL;
4059 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4060 section and the rofixup section. Assign locations for GOT and PLT
4064 _bfinfdpic_size_got_plt (bfd *output_bfd,
4065 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4069 struct bfd_link_info *info = gpinfop->g.info;
4070 bfd *dynobj = elf_hash_table (info)->dynobj;
4072 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4073 sizeof (gpinfop->g));
4076 /* Compute the total size taken by entries in the 18-bit range,
4077 to tell how many PLT function descriptors we can bring into it
4078 without causing it to overflow. */
4079 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4080 if (limit < (bfd_vma)1 << 18)
4081 limit = ((bfd_vma)1 << 18) - limit;
4084 if (gpinfop->g.fdplt < limit)
4085 limit = gpinfop->g.fdplt;
4087 /* Determine the ranges of GOT offsets that we can use for each
4088 range of addressing modes. */
4089 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4096 (bfd_vma)1 << (18-1));
4097 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4098 gpinfop->got17m4.min,
4100 gpinfop->got17m4.max,
4103 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4104 (bfd_vma)1 << (32-1));
4106 /* Now assign (most) GOT offsets. */
4107 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4110 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4111 - gpinfop->gothilo.min
4112 /* If an odd word is the last word of the GOT, we don't need this
4113 word to be part of the GOT. */
4114 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4115 if (bfinfdpic_got_section (info)->size == 0)
4116 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4117 else if (bfinfdpic_got_section (info)->size == 12
4118 && ! elf_hash_table (info)->dynamic_sections_created)
4120 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4121 bfinfdpic_got_section (info)->size = 0;
4125 bfinfdpic_got_section (info)->contents =
4126 (bfd_byte *) bfd_zalloc (dynobj,
4127 bfinfdpic_got_section (info)->size);
4128 if (bfinfdpic_got_section (info)->contents == NULL)
4132 if (elf_hash_table (info)->dynamic_sections_created)
4133 /* Subtract the number of lzplt entries, since those will generate
4134 relocations in the pltrel section. */
4135 bfinfdpic_gotrel_section (info)->size =
4136 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4137 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4139 BFD_ASSERT (gpinfop->g.relocs == 0);
4140 if (bfinfdpic_gotrel_section (info)->size == 0)
4141 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4144 bfinfdpic_gotrel_section (info)->contents =
4145 (bfd_byte *) bfd_zalloc (dynobj,
4146 bfinfdpic_gotrel_section (info)->size);
4147 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4151 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4152 if (bfinfdpic_gotfixup_section (info)->size == 0)
4153 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4156 bfinfdpic_gotfixup_section (info)->contents =
4157 (bfd_byte *) bfd_zalloc (dynobj,
4158 bfinfdpic_gotfixup_section (info)->size);
4159 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4163 if (elf_hash_table (info)->dynamic_sections_created)
4164 bfinfdpic_pltrel_section (info)->size =
4165 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4166 if (bfinfdpic_pltrel_section (info)->size == 0)
4167 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4170 bfinfdpic_pltrel_section (info)->contents =
4171 (bfd_byte *) bfd_zalloc (dynobj,
4172 bfinfdpic_pltrel_section (info)->size);
4173 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4177 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4178 such that there's room for the additional instruction needed to
4179 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4180 account for them, our block size is 4 bytes smaller than the real
4182 if (elf_hash_table (info)->dynamic_sections_created)
4184 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4185 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4186 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4189 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4190 actually assign lazy PLT entries addresses. */
4191 gpinfop->g.lzplt = 0;
4193 /* Save information that we're going to need to generate GOT and PLT
4195 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4197 if (get_elf_backend_data (output_bfd)->want_got_sym)
4198 elf_hash_table (info)->hgot->root.u.def.value
4199 = bfinfdpic_got_initial_offset (info);
4201 if (elf_hash_table (info)->dynamic_sections_created)
4202 bfinfdpic_plt_initial_offset (info) =
4203 bfinfdpic_plt_section (info)->size;
4205 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4208 /* Allocate the PLT section contents only after
4209 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4210 non-lazy PLT entries. */
4211 if (bfinfdpic_plt_section (info)->size == 0)
4212 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4215 bfinfdpic_plt_section (info)->contents =
4216 (bfd_byte *) bfd_zalloc (dynobj,
4217 bfinfdpic_plt_section (info)->size);
4218 if (bfinfdpic_plt_section (info)->contents == NULL)
4225 /* Set the sizes of the dynamic sections. */
4228 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4229 struct bfd_link_info *info)
4231 struct elf_link_hash_table *htab;
4234 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4236 htab = elf_hash_table (info);
4237 dynobj = htab->dynobj;
4238 BFD_ASSERT (dynobj != NULL);
4240 if (htab->dynamic_sections_created)
4242 /* Set the contents of the .interp section to the interpreter. */
4243 if (info->executable)
4245 s = bfd_get_section_by_name (dynobj, ".interp");
4246 BFD_ASSERT (s != NULL);
4247 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4248 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4252 memset (&gpinfo, 0, sizeof (gpinfo));
4253 gpinfo.g.info = info;
4257 htab_t relocs = bfinfdpic_relocs_info (info);
4259 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4261 if (relocs == bfinfdpic_relocs_info (info))
4265 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4268 /* Allocate space to save the summary information, we're going to
4269 use it if we're doing relaxations. */
4270 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4272 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4275 if (elf_hash_table (info)->dynamic_sections_created)
4277 if (bfinfdpic_got_section (info)->size)
4278 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4281 if (bfinfdpic_pltrel_section (info)->size)
4282 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4283 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4284 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4287 if (bfinfdpic_gotrel_section (info)->size)
4288 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4289 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4290 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4291 sizeof (Elf32_External_Rel)))
4295 s = bfd_get_section_by_name (dynobj, ".dynbss");
4296 if (s && s->size == 0)
4297 s->flags |= SEC_EXCLUDE;
4299 s = bfd_get_section_by_name (dynobj, ".rela.bss");
4300 if (s && s->size == 0)
4301 s->flags |= SEC_EXCLUDE;
4307 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4308 struct bfd_link_info *info)
4310 if (!info->relocatable)
4312 struct elf_link_hash_entry *h;
4314 /* Force a PT_GNU_STACK segment to be created. */
4315 if (! elf_tdata (output_bfd)->stack_flags)
4316 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4318 /* Define __stacksize if it's not defined yet. */
4319 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4320 FALSE, FALSE, FALSE);
4321 if (! h || h->root.type != bfd_link_hash_defined
4322 || h->type != STT_OBJECT
4325 struct bfd_link_hash_entry *bh = NULL;
4327 if (!(_bfd_generic_link_add_one_symbol
4328 (info, output_bfd, "__stacksize",
4329 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4330 (const char *) NULL, FALSE,
4331 get_elf_backend_data (output_bfd)->collect, &bh)))
4334 h = (struct elf_link_hash_entry *) bh;
4336 h->type = STT_OBJECT;
4343 /* Check whether any of the relocations was optimized away, and
4344 subtract it from the relocation or fixup count. */
4346 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4347 struct bfd_link_info *info,
4349 bfd_boolean *changed)
4351 Elf_Internal_Shdr *symtab_hdr;
4352 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4353 Elf_Internal_Rela *rel, *erel;
4355 if ((sec->flags & SEC_RELOC) == 0
4356 || sec->reloc_count == 0)
4359 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4360 sym_hashes = elf_sym_hashes (abfd);
4361 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4362 if (!elf_bad_symtab (abfd))
4363 sym_hashes_end -= symtab_hdr->sh_info;
4365 rel = elf_section_data (sec)->relocs;
4367 /* Now examine each relocation. */
4368 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4370 struct elf_link_hash_entry *h;
4371 unsigned long r_symndx;
4372 struct bfinfdpic_relocs_info *picrel;
4373 struct _bfinfdpic_dynamic_got_info *dinfo;
4375 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4376 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4379 if (_bfd_elf_section_offset (sec->output_section->owner,
4380 info, sec, rel->r_offset)
4384 r_symndx = ELF32_R_SYM (rel->r_info);
4385 if (r_symndx < symtab_hdr->sh_info)
4389 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4390 while (h->root.type == bfd_link_hash_indirect
4391 || h->root.type == bfd_link_hash_warning)
4392 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4396 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4398 rel->r_addend, NO_INSERT);
4400 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4402 rel->r_addend, NO_INSERT);
4408 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4410 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4411 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4413 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4415 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4422 bfinfdpic_elf_discard_info (bfd *ibfd,
4423 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4424 struct bfd_link_info *info)
4426 bfd_boolean changed = FALSE;
4430 /* Account for relaxation of .eh_frame section. */
4431 for (s = ibfd->sections; s; s = s->next)
4432 if (s->sec_info_type == ELF_INFO_TYPE_EH_FRAME)
4434 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4436 obfd = s->output_section->owner;
4441 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4443 memset (&gpinfo, 0, sizeof (gpinfo));
4444 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4447 /* Clear GOT and PLT assignments. */
4448 htab_traverse (bfinfdpic_relocs_info (info),
4449 _bfinfdpic_reset_got_plt_entries,
4452 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4460 elf32_bfinfdpic_modify_program_headers (bfd *output_bfd,
4461 struct bfd_link_info *info)
4463 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
4464 struct elf_segment_map *m;
4465 Elf_Internal_Phdr *p;
4467 /* objcopy and strip preserve what's already there using
4468 elf32_bfinfdpic_copy_private_bfd_data (). */
4472 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
4473 if (m->p_type == PT_GNU_STACK)
4478 struct elf_link_hash_entry *h;
4480 /* Obtain the pointer to the __stacksize symbol. */
4481 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4482 FALSE, FALSE, FALSE);
4485 while (h->root.type == bfd_link_hash_indirect
4486 || h->root.type == bfd_link_hash_warning)
4487 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4488 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4491 /* Set the header p_memsz from the symbol value. We
4492 intentionally ignore the symbol section. */
4493 if (h && h->root.type == bfd_link_hash_defined)
4494 p->p_memsz = h->root.u.def.value;
4496 p->p_memsz = DEFAULT_STACK_SIZE;
4505 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4506 struct bfd_link_info *info)
4511 dynobj = elf_hash_table (info)->dynobj;
4513 if (bfinfdpic_got_section (info))
4515 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4516 == (bfinfdpic_gotrel_section (info)->reloc_count
4517 * sizeof (Elf32_External_Rel)));
4519 if (bfinfdpic_gotfixup_section (info))
4521 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4522 bfd_vma got_value = hgot->root.u.def.value
4523 + hgot->root.u.def.section->output_section->vma
4524 + hgot->root.u.def.section->output_offset;
4526 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4529 if (bfinfdpic_gotfixup_section (info)->size
4530 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4532 (*_bfd_error_handler)
4533 ("LINKER BUG: .rofixup section size mismatch");
4538 if (elf_hash_table (info)->dynamic_sections_created)
4540 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4541 == (bfinfdpic_pltrel_section (info)->reloc_count
4542 * sizeof (Elf32_External_Rel)));
4545 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4547 if (elf_hash_table (info)->dynamic_sections_created)
4549 Elf32_External_Dyn * dyncon;
4550 Elf32_External_Dyn * dynconend;
4552 BFD_ASSERT (sdyn != NULL);
4554 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4555 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4557 for (; dyncon < dynconend; dyncon++)
4559 Elf_Internal_Dyn dyn;
4561 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4569 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4570 + bfinfdpic_got_section (info)->output_offset
4571 + bfinfdpic_got_initial_offset (info);
4572 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4576 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4577 ->output_section->vma
4578 + bfinfdpic_pltrel_section (info)->output_offset;
4579 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4583 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4584 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4593 /* Adjust a symbol defined by a dynamic object and referenced by a
4597 elf32_bfinfdpic_adjust_dynamic_symbol
4598 (struct bfd_link_info *info,
4599 struct elf_link_hash_entry *h)
4603 dynobj = elf_hash_table (info)->dynobj;
4605 /* Make sure we know what is going on here. */
4606 BFD_ASSERT (dynobj != NULL
4607 && (h->u.weakdef != NULL
4610 && !h->def_regular)));
4612 /* If this is a weak symbol, and there is a real definition, the
4613 processor independent code will have arranged for us to see the
4614 real definition first, and we can just use the same value. */
4615 if (h->u.weakdef != NULL)
4617 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4618 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4619 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4620 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4626 /* Perform any actions needed for dynamic symbols. */
4629 elf32_bfinfdpic_finish_dynamic_symbol
4630 (bfd *output_bfd ATTRIBUTE_UNUSED,
4631 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4632 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4633 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4638 /* Decide whether to attempt to turn absptr or lsda encodings in
4639 shared libraries into pcrel within the given input section. */
4642 bfinfdpic_elf_use_relative_eh_frame
4643 (bfd *input_bfd ATTRIBUTE_UNUSED,
4644 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4645 asection *eh_frame_section ATTRIBUTE_UNUSED)
4647 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4651 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4654 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4655 struct bfd_link_info *info,
4656 asection *osec, bfd_vma offset,
4657 asection *loc_sec, bfd_vma loc_offset,
4660 struct elf_link_hash_entry *h;
4662 h = elf_hash_table (info)->hgot;
4663 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4665 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4666 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4667 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4668 loc_sec, loc_offset, encoded);
4670 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4671 == (_bfinfdpic_osec_to_segment
4672 (abfd, h->root.u.def.section->output_section)));
4674 *encoded = osec->vma + offset
4675 - (h->root.u.def.value
4676 + h->root.u.def.section->output_section->vma
4677 + h->root.u.def.section->output_offset);
4679 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4684 /* Look through the relocs for a section during the first phase.
4686 Besides handling virtual table relocs for gc, we have to deal with
4687 all sorts of PIC-related relocations. We describe below the
4688 general plan on how to handle such relocations, even though we only
4689 collect information at this point, storing them in hash tables for
4690 perusal of later passes.
4692 32 relocations are propagated to the linker output when creating
4693 position-independent output. LO16 and HI16 relocations are not
4694 supposed to be encountered in this case.
4696 LABEL16 should always be resolvable by the linker, since it's only
4699 LABEL24, on the other hand, is used by calls. If it turns out that
4700 the target of a call is a dynamic symbol, a PLT entry must be
4701 created for it, which triggers the creation of a private function
4702 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4704 GPREL relocations require the referenced symbol to be in the same
4705 segment as _gp, but this can only be checked later.
4707 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4708 exist. LABEL24 might as well, since it may require a PLT entry,
4709 that will require a got.
4711 Non-FUNCDESC GOT relocations require a GOT entry to be created
4712 regardless of whether the symbol is dynamic. However, since a
4713 global symbol that turns out to not be exported may have the same
4714 address of a non-dynamic symbol, we don't assign GOT entries at
4715 this point, such that we can share them in this case. A relocation
4716 for the GOT entry always has to be created, be it to offset a
4717 private symbol by the section load address, be it to get the symbol
4718 resolved dynamically.
4720 FUNCDESC GOT relocations require a GOT entry to be created, and
4721 handled as if a FUNCDESC relocation was applied to the GOT entry in
4724 FUNCDESC relocations referencing a symbol that turns out to NOT be
4725 dynamic cause a private function descriptor to be created. The
4726 FUNCDESC relocation then decays to a 32 relocation that points at
4727 the private descriptor. If the symbol is dynamic, the FUNCDESC
4728 relocation is propagated to the linker output, such that the
4729 dynamic linker creates the canonical descriptor, pointing to the
4730 dynamically-resolved definition of the function.
4732 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4733 symbols that are assigned to the same segment as the GOT, but we
4734 can only check this later, after we know the complete set of
4735 symbols defined and/or exported.
4737 FUNCDESC GOTOFF relocations require a function descriptor to be
4738 created and, unless lazy binding is disabled or the symbol is not
4739 dynamic, a lazy PLT entry. Since we can't tell at this point
4740 whether a symbol is going to be dynamic, we have to decide later
4741 whether to create a lazy PLT entry or bind the descriptor directly
4742 to the private function.
4744 FUNCDESC_VALUE relocations are not supposed to be present in object
4745 files, but they may very well be simply propagated to the linker
4746 output, since they have no side effect.
4749 A function descriptor always requires a FUNCDESC_VALUE relocation.
4750 Whether it's in .plt.rel or not depends on whether lazy binding is
4751 enabled and on whether the referenced symbol is dynamic.
4753 The existence of a lazy PLT requires the resolverStub lazy PLT
4754 entry to be present.
4757 As for assignment of GOT, PLT and lazy PLT entries, and private
4758 descriptors, we might do them all sequentially, but we can do
4759 better than that. For example, we can place GOT entries and
4760 private function descriptors referenced using 12-bit operands
4761 closer to the PIC register value, such that these relocations don't
4762 overflow. Those that are only referenced with LO16 relocations
4763 could come next, but we may as well place PLT-required function
4764 descriptors in the 12-bit range to make them shorter. Symbols
4765 referenced with LO16/HI16 may come next, but we may place
4766 additional function descriptors in the 16-bit range if we can
4767 reliably tell that we've already placed entries that are ever
4768 referenced with only LO16. PLT entries are therefore generated as
4769 small as possible, while not introducing relocation overflows in
4770 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4771 generated before or after PLT entries, but not intermingled with
4772 them, such that we can have more lazy PLT entries in range for a
4773 branch to the resolverStub. The resolverStub should be emitted at
4774 the most distant location from the first lazy PLT entry such that
4775 it's still in range for a branch, or closer, if there isn't a need
4776 for so many lazy PLT entries. Additional lazy PLT entries may be
4777 emitted after the resolverStub, as long as branches are still in
4778 range. If the branch goes out of range, longer lazy PLT entries
4781 We could further optimize PLT and lazy PLT entries by giving them
4782 priority in assignment to closer-to-gr17 locations depending on the
4783 number of occurrences of references to them (assuming a function
4784 that's called more often is more important for performance, so its
4785 PLT entry should be faster), or taking hints from the compiler.
4786 Given infinite time and money... :-) */
4789 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4790 asection *sec, const Elf_Internal_Rela *relocs)
4792 Elf_Internal_Shdr *symtab_hdr;
4793 struct elf_link_hash_entry **sym_hashes;
4794 const Elf_Internal_Rela *rel;
4795 const Elf_Internal_Rela *rel_end;
4797 struct bfinfdpic_relocs_info *picrel;
4799 if (info->relocatable)
4802 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4803 sym_hashes = elf_sym_hashes (abfd);
4805 dynobj = elf_hash_table (info)->dynobj;
4806 rel_end = relocs + sec->reloc_count;
4807 for (rel = relocs; rel < rel_end; rel++)
4809 struct elf_link_hash_entry *h;
4810 unsigned long r_symndx;
4812 r_symndx = ELF32_R_SYM (rel->r_info);
4813 if (r_symndx < symtab_hdr->sh_info)
4816 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4818 switch (ELF32_R_TYPE (rel->r_info))
4820 case R_BFIN_GOT17M4:
4823 case R_BFIN_FUNCDESC_GOT17M4:
4824 case R_BFIN_FUNCDESC_GOTHI:
4825 case R_BFIN_FUNCDESC_GOTLO:
4826 case R_BFIN_GOTOFF17M4:
4827 case R_BFIN_GOTOFFHI:
4828 case R_BFIN_GOTOFFLO:
4829 case R_BFIN_FUNCDESC_GOTOFF17M4:
4830 case R_BFIN_FUNCDESC_GOTOFFHI:
4831 case R_BFIN_FUNCDESC_GOTOFFLO:
4832 case R_BFIN_FUNCDESC:
4833 case R_BFIN_FUNCDESC_VALUE:
4834 if (! IS_FDPIC (abfd))
4837 case R_BFIN_PCREL24:
4838 case R_BFIN_PCREL24_JUMP_L:
4839 case R_BFIN_BYTE4_DATA:
4840 if (IS_FDPIC (abfd) && ! dynobj)
4842 elf_hash_table (info)->dynobj = dynobj = abfd;
4843 if (! _bfin_create_got_section (abfd, info))
4846 if (! IS_FDPIC (abfd))
4853 if (h->dynindx == -1)
4854 switch (ELF_ST_VISIBILITY (h->other))
4860 bfd_elf_link_record_dynamic_symbol (info, h);
4864 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4866 rel->r_addend, INSERT);
4869 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4870 (info), abfd, r_symndx,
4871 rel->r_addend, INSERT);
4881 switch (ELF32_R_TYPE (rel->r_info))
4883 case R_BFIN_PCREL24:
4884 case R_BFIN_PCREL24_JUMP_L:
4885 if (IS_FDPIC (abfd))
4889 case R_BFIN_FUNCDESC_VALUE:
4890 picrel->relocsfdv++;
4891 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4895 case R_BFIN_BYTE4_DATA:
4896 if (! IS_FDPIC (abfd))
4900 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4904 case R_BFIN_GOT17M4:
4913 case R_BFIN_FUNCDESC_GOT17M4:
4914 picrel->fdgot17m4++;
4917 case R_BFIN_FUNCDESC_GOTHI:
4918 case R_BFIN_FUNCDESC_GOTLO:
4919 picrel->fdgothilo++;
4922 case R_BFIN_GOTOFF17M4:
4923 case R_BFIN_GOTOFFHI:
4924 case R_BFIN_GOTOFFLO:
4928 case R_BFIN_FUNCDESC_GOTOFF17M4:
4929 picrel->fdgoff17m4++;
4932 case R_BFIN_FUNCDESC_GOTOFFHI:
4933 case R_BFIN_FUNCDESC_GOTOFFLO:
4934 picrel->fdgoffhilo++;
4937 case R_BFIN_FUNCDESC:
4942 /* This relocation describes the C++ object vtable hierarchy.
4943 Reconstruct it for later use during GC. */
4944 case R_BFIN_GNU_VTINHERIT:
4945 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4949 /* This relocation describes which C++ vtable entries are actually
4950 used. Record for later use during GC. */
4951 case R_BFIN_GNU_VTENTRY:
4952 BFD_ASSERT (h != NULL);
4954 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4958 case R_BFIN_HUIMM16:
4959 case R_BFIN_LUIMM16:
4960 case R_BFIN_PCREL12_JUMP_S:
4961 case R_BFIN_PCREL10:
4966 (*_bfd_error_handler)
4967 (_("%B: unsupported relocation type %i"),
4968 abfd, ELF32_R_TYPE (rel->r_info));
4976 /* Set the right machine number for a Blackfin ELF file. */
4979 elf32_bfin_object_p (bfd *abfd)
4981 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4982 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4983 == (IS_FDPIC (abfd)));
4987 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4989 elf_elfheader (abfd)->e_flags = flags;
4990 elf_flags_init (abfd) = TRUE;
4994 /* Copy backend specific data from one object module to another. */
4997 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4999 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5000 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5003 BFD_ASSERT (!elf_flags_init (obfd)
5004 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
5006 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
5007 elf_flags_init (obfd) = TRUE;
5009 /* Copy object attributes. */
5010 _bfd_elf_copy_obj_attributes (ibfd, obfd);
5016 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5020 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5021 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5024 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
5027 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
5028 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
5031 /* Copy the stack size. */
5032 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
5033 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
5035 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
5037 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
5038 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
5040 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
5042 /* Rewrite the phdrs, since we're only called after they
5043 were first written. */
5044 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
5045 ->s->sizeof_ehdr, SEEK_SET) != 0
5046 || get_elf_backend_data (obfd)->s
5047 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
5048 elf_elfheader (obfd)->e_phnum) != 0)
5060 /* Display the flags field. */
5062 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
5064 FILE *file = (FILE *) ptr;
5067 BFD_ASSERT (abfd != NULL && ptr != NULL);
5069 /* Print normal ELF private data. */
5070 _bfd_elf_print_private_bfd_data (abfd, ptr);
5072 flags = elf_elfheader (abfd)->e_flags;
5074 /* xgettext:c-format */
5075 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5077 if (flags & EF_BFIN_PIC)
5078 fprintf (file, " -fpic");
5080 if (flags & EF_BFIN_FDPIC)
5081 fprintf (file, " -mfdpic");
5088 /* Merge backend specific data from an object file to the output
5089 object file when linking. */
5092 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5094 flagword old_flags, new_flags;
5095 bfd_boolean error = FALSE;
5097 new_flags = elf_elfheader (ibfd)->e_flags;
5098 old_flags = elf_elfheader (obfd)->e_flags;
5100 if (new_flags & EF_BFIN_FDPIC)
5101 new_flags &= ~EF_BFIN_PIC;
5106 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
5107 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
5108 bfd_get_filename (ibfd));
5110 if (!elf_flags_init (obfd)) /* First call, no flags set. */
5112 elf_flags_init (obfd) = TRUE;
5113 elf_elfheader (obfd)->e_flags = new_flags;
5116 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
5119 if (IS_FDPIC (obfd))
5120 (*_bfd_error_handler)
5121 (_("%s: cannot link non-fdpic object file into fdpic executable"),
5122 bfd_get_filename (ibfd));
5124 (*_bfd_error_handler)
5125 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5126 bfd_get_filename (ibfd));
5130 bfd_set_error (bfd_error_bad_value);
5135 /* bfin ELF linker hash entry. */
5137 struct bfin_link_hash_entry
5139 struct elf_link_hash_entry root;
5141 /* Number of PC relative relocs copied for this symbol. */
5142 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5145 /* bfin ELF linker hash table. */
5147 struct bfin_link_hash_table
5149 struct elf_link_hash_table root;
5151 /* Small local sym cache. */
5152 struct sym_cache sym_cache;
5155 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5157 static struct bfd_hash_entry *
5158 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5159 struct bfd_hash_table *table, const char *string)
5161 struct bfd_hash_entry *ret = entry;
5163 /* Allocate the structure if it has not already been allocated by a
5166 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5170 /* Call the allocation method of the superclass. */
5171 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5173 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5178 /* Create an bfin ELF linker hash table. */
5180 static struct bfd_link_hash_table *
5181 bfin_link_hash_table_create (bfd * abfd)
5183 struct bfin_link_hash_table *ret;
5184 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5186 ret = bfd_zalloc (abfd, amt);
5190 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5191 bfin_link_hash_newfunc,
5192 sizeof (struct elf_link_hash_entry),
5199 ret->sym_cache.abfd = NULL;
5201 return &ret->root.root;
5204 /* The size in bytes of an entry in the procedure linkage table. */
5206 /* Finish up the dynamic sections. */
5209 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5210 struct bfd_link_info *info)
5215 dynobj = elf_hash_table (info)->dynobj;
5217 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5219 if (elf_hash_table (info)->dynamic_sections_created)
5221 Elf32_External_Dyn *dyncon, *dynconend;
5223 BFD_ASSERT (sdyn != NULL);
5225 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5226 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5227 for (; dyncon < dynconend; dyncon++)
5229 Elf_Internal_Dyn dyn;
5231 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5239 /* Finish up dynamic symbol handling. We set the contents of various
5240 dynamic sections here. */
5243 bfin_finish_dynamic_symbol (bfd * output_bfd,
5244 struct bfd_link_info *info,
5245 struct elf_link_hash_entry *h,
5246 Elf_Internal_Sym * sym)
5250 dynobj = elf_hash_table (info)->dynobj;
5252 if (h->got.offset != (bfd_vma) - 1)
5256 Elf_Internal_Rela rela;
5259 /* This symbol has an entry in the global offset table.
5262 sgot = bfd_get_section_by_name (dynobj, ".got");
5263 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5264 BFD_ASSERT (sgot != NULL && srela != NULL);
5266 rela.r_offset = (sgot->output_section->vma
5267 + sgot->output_offset
5268 + (h->got.offset & ~(bfd_vma) 1));
5270 /* If this is a -Bsymbolic link, and the symbol is defined
5271 locally, we just want to emit a RELATIVE reloc. Likewise if
5272 the symbol was forced to be local because of a version file.
5273 The entry in the global offset table will already have been
5274 initialized in the relocate_section function. */
5277 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5279 (*_bfd_error_handler) (_("*** check this relocation %s"),
5281 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5282 rela.r_addend = bfd_get_signed_32 (output_bfd,
5286 offset & ~(bfd_vma) 1)));
5290 bfd_put_32 (output_bfd, (bfd_vma) 0,
5291 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5292 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5296 loc = srela->contents;
5297 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5298 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5305 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5306 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5307 || h == elf_hash_table (info)->hgot)
5308 sym->st_shndx = SHN_ABS;
5313 /* Adjust a symbol defined by a dynamic object and referenced by a
5314 regular object. The current definition is in some section of the
5315 dynamic object, but we're not including those sections. We have to
5316 change the definition to something the rest of the link can
5320 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5321 struct elf_link_hash_entry *h)
5325 unsigned int power_of_two;
5327 dynobj = elf_hash_table (info)->dynobj;
5329 /* Make sure we know what is going on here. */
5330 BFD_ASSERT (dynobj != NULL
5332 || h->u.weakdef != NULL
5333 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5335 /* If this is a function, put it in the procedure linkage table. We
5336 will fill in the contents of the procedure linkage table later,
5337 when we know the address of the .got section. */
5338 if (h->type == STT_FUNC || h->needs_plt)
5343 /* If this is a weak symbol, and there is a real definition, the
5344 processor independent code will have arranged for us to see the
5345 real definition first, and we can just use the same value. */
5346 if (h->u.weakdef != NULL)
5348 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5349 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5350 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5351 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5355 /* This is a reference to a symbol defined by a dynamic object which
5356 is not a function. */
5358 /* If we are creating a shared library, we must presume that the
5359 only references to the symbol are via the global offset table.
5360 For such cases we need not do anything here; the relocations will
5361 be handled correctly by relocate_section. */
5365 /* We must allocate the symbol in our .dynbss section, which will
5366 become part of the .bss section of the executable. There will be
5367 an entry for this symbol in the .dynsym section. The dynamic
5368 object will contain position independent code, so all references
5369 from the dynamic object to this symbol will go through the global
5370 offset table. The dynamic linker will use the .dynsym entry to
5371 determine the address it must put in the global offset table, so
5372 both the dynamic object and the regular object will refer to the
5373 same memory location for the variable. */
5375 s = bfd_get_section_by_name (dynobj, ".dynbss");
5376 BFD_ASSERT (s != NULL);
5378 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5379 copy the initial value out of the dynamic object and into the
5380 runtime process image. We need to remember the offset into the
5381 .rela.bss section we are going to use. */
5382 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5386 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5387 BFD_ASSERT (srel != NULL);
5388 srel->size += sizeof (Elf32_External_Rela);
5392 /* We need to figure out the alignment required for this symbol. I
5393 have no idea how ELF linkers handle this. */
5394 power_of_two = bfd_log2 (h->size);
5395 if (power_of_two > 3)
5398 /* Apply the required alignment. */
5399 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5400 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5402 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5406 /* Define the symbol as being at this point in the section. */
5407 h->root.u.def.section = s;
5408 h->root.u.def.value = s->size;
5410 /* Increment the section size to make room for the symbol. */
5416 /* The bfin linker needs to keep track of the number of relocs that it
5417 decides to copy in check_relocs for each symbol. This is so that it
5418 can discard PC relative relocs if it doesn't need them when linking
5419 with -Bsymbolic. We store the information in a field extending the
5420 regular ELF linker hash table. */
5422 /* This structure keeps track of the number of PC relative relocs we have
5423 copied for a given symbol. */
5425 struct bfin_pcrel_relocs_copied
5428 struct bfin_pcrel_relocs_copied *next;
5429 /* A section in dynobj. */
5431 /* Number of relocs copied in this section. */
5432 bfd_size_type count;
5435 /* This function is called via elf_link_hash_traverse if we are
5436 creating a shared object. In the -Bsymbolic case it discards the
5437 space allocated to copy PC relative relocs against symbols which
5438 are defined in regular objects. For the normal shared case, it
5439 discards space for pc-relative relocs that have become local due to
5440 symbol visibility changes. We allocated space for them in the
5441 check_relocs routine, but we won't fill them in in the
5442 relocate_section routine.
5444 We also check whether any of the remaining relocations apply
5445 against a readonly section, and set the DF_TEXTREL flag in this
5449 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5451 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5452 struct bfin_pcrel_relocs_copied *s;
5454 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5456 if ((info->flags & DF_TEXTREL) == 0)
5458 /* Look for relocations against read-only sections. */
5459 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5460 s != NULL; s = s->next)
5461 if ((s->section->flags & SEC_READONLY) != 0)
5463 info->flags |= DF_TEXTREL;
5471 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5472 s != NULL; s = s->next)
5473 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5479 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5480 struct bfd_link_info *info)
5486 dynobj = elf_hash_table (info)->dynobj;
5487 BFD_ASSERT (dynobj != NULL);
5489 if (elf_hash_table (info)->dynamic_sections_created)
5491 /* Set the contents of the .interp section to the interpreter. */
5492 if (info->executable)
5494 s = bfd_get_section_by_name (dynobj, ".interp");
5495 BFD_ASSERT (s != NULL);
5496 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5497 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5502 /* We may have created entries in the .rela.got section.
5503 However, if we are not creating the dynamic sections, we will
5504 not actually use these entries. Reset the size of .rela.got,
5505 which will cause it to get stripped from the output file
5507 s = bfd_get_section_by_name (dynobj, ".rela.got");
5512 /* If this is a -Bsymbolic shared link, then we need to discard all
5513 PC relative relocs against symbols defined in a regular object.
5514 For the normal shared case we discard the PC relative relocs
5515 against symbols that have become local due to visibility changes.
5516 We allocated space for them in the check_relocs routine, but we
5517 will not fill them in in the relocate_section routine. */
5519 elf_link_hash_traverse (elf_hash_table (info),
5520 bfin_discard_copies, (PTR) info);
5522 /* The check_relocs and adjust_dynamic_symbol entry points have
5523 determined the sizes of the various dynamic sections. Allocate
5526 for (s = dynobj->sections; s != NULL; s = s->next)
5531 if ((s->flags & SEC_LINKER_CREATED) == 0)
5534 /* It's OK to base decisions on the section name, because none
5535 of the dynobj section names depend upon the input files. */
5536 name = bfd_get_section_name (dynobj, s);
5540 if (CONST_STRNEQ (name, ".rela"))
5544 /* If we don't need this section, strip it from the
5545 output file. This is mostly to handle .rela.bss and
5546 .rela.plt. We must create both sections in
5547 create_dynamic_sections, because they must be created
5548 before the linker maps input sections to output
5549 sections. The linker does that before
5550 adjust_dynamic_symbol is called, and it is that
5551 function which decides whether anything needs to go
5552 into these sections. */
5559 /* We use the reloc_count field as a counter if we need
5560 to copy relocs into the output file. */
5564 else if (! CONST_STRNEQ (name, ".got"))
5566 /* It's not one of our sections, so don't allocate space. */
5572 s->flags |= SEC_EXCLUDE;
5576 /* Allocate memory for the section contents. */
5577 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5578 Unused entries should be reclaimed before the section's contents
5579 are written out, but at the moment this does not happen. Thus in
5580 order to prevent writing out garbage, we initialise the section's
5581 contents to zero. */
5582 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5583 if (s->contents == NULL && s->size != 0)
5587 if (elf_hash_table (info)->dynamic_sections_created)
5589 /* Add some entries to the .dynamic section. We fill in the
5590 values later, in bfin_finish_dynamic_sections, but we
5591 must add the entries now so that we get the correct size for
5592 the .dynamic section. The DT_DEBUG entry is filled in by the
5593 dynamic linker and used by the debugger. */
5594 #define add_dynamic_entry(TAG, VAL) \
5595 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5599 if (!add_dynamic_entry (DT_DEBUG, 0))
5606 if (!add_dynamic_entry (DT_RELA, 0)
5607 || !add_dynamic_entry (DT_RELASZ, 0)
5608 || !add_dynamic_entry (DT_RELAENT,
5609 sizeof (Elf32_External_Rela)))
5613 if ((info->flags & DF_TEXTREL) != 0)
5615 if (!add_dynamic_entry (DT_TEXTREL, 0))
5619 #undef add_dynamic_entry
5624 /* Given a .data section and a .emreloc in-memory section, store
5625 relocation information into the .emreloc section which can be
5626 used at runtime to relocate the section. This is called by the
5627 linker when the --embedded-relocs switch is used. This is called
5628 after the add_symbols entry point has been called for all the
5629 objects, and before the final_link entry point is called. */
5631 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5632 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5635 bfd_bfin_elf32_create_embedded_relocs (
5637 struct bfd_link_info *info,
5642 Elf_Internal_Shdr *symtab_hdr;
5643 Elf_Internal_Sym *isymbuf = NULL;
5644 Elf_Internal_Rela *internal_relocs = NULL;
5645 Elf_Internal_Rela *irel, *irelend;
5649 BFD_ASSERT (! info->relocatable);
5653 if (datasec->reloc_count == 0)
5656 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5658 /* Get a copy of the native relocations. */
5659 internal_relocs = (_bfd_elf_link_read_relocs
5660 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5661 info->keep_memory));
5662 if (internal_relocs == NULL)
5665 amt = (bfd_size_type) datasec->reloc_count * 12;
5666 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5667 if (relsec->contents == NULL)
5670 p = relsec->contents;
5672 irelend = internal_relocs + datasec->reloc_count;
5673 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5675 asection *targetsec;
5677 /* We are going to write a four byte longword into the runtime
5678 reloc section. The longword will be the address in the data
5679 section which must be relocated. It is followed by the name
5680 of the target section NUL-padded or truncated to 8
5683 /* We can only relocate absolute longword relocs at run time. */
5684 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5686 *errmsg = _("unsupported reloc type");
5687 bfd_set_error (bfd_error_bad_value);
5691 /* Get the target section referred to by the reloc. */
5692 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5694 /* A local symbol. */
5695 Elf_Internal_Sym *isym;
5697 /* Read this BFD's local symbols if we haven't done so already. */
5698 if (isymbuf == NULL)
5700 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5701 if (isymbuf == NULL)
5702 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5703 symtab_hdr->sh_info, 0,
5705 if (isymbuf == NULL)
5709 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5710 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5715 struct elf_link_hash_entry *h;
5717 /* An external symbol. */
5718 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5719 h = elf_sym_hashes (abfd)[indx];
5720 BFD_ASSERT (h != NULL);
5721 if (h->root.type == bfd_link_hash_defined
5722 || h->root.type == bfd_link_hash_defweak)
5723 targetsec = h->root.u.def.section;
5728 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5729 memset (p + 4, 0, 8);
5730 if (targetsec != NULL)
5731 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5734 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5736 if (internal_relocs != NULL
5737 && elf_section_data (datasec)->relocs != internal_relocs)
5738 free (internal_relocs);
5742 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5744 if (internal_relocs != NULL
5745 && elf_section_data (datasec)->relocs != internal_relocs)
5746 free (internal_relocs);
5750 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5752 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5753 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5754 { NULL, 0, 0, 0, 0 }
5758 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5759 #define TARGET_LITTLE_NAME "elf32-bfin"
5760 #define ELF_ARCH bfd_arch_bfin
5761 #define ELF_TARGET_ID BFIN_ELF_DATA
5762 #define ELF_MACHINE_CODE EM_BLACKFIN
5763 #define ELF_MAXPAGESIZE 0x1000
5764 #define elf_symbol_leading_char '_'
5766 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5767 #define bfd_elf32_bfd_reloc_name_lookup \
5768 bfin_bfd_reloc_name_lookup
5769 #define elf_info_to_howto bfin_info_to_howto
5770 #define elf_info_to_howto_rel 0
5771 #define elf_backend_object_p elf32_bfin_object_p
5773 #define bfd_elf32_bfd_is_local_label_name \
5774 bfin_is_local_label_name
5775 #define bfin_hash_table(p) \
5776 ((struct bfin_link_hash_table *) (p)->hash)
5780 #define elf_backend_create_dynamic_sections \
5781 _bfd_elf_create_dynamic_sections
5782 #define bfd_elf32_bfd_link_hash_table_create \
5783 bfin_link_hash_table_create
5784 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5786 #define elf_backend_check_relocs bfin_check_relocs
5787 #define elf_backend_adjust_dynamic_symbol \
5788 bfin_adjust_dynamic_symbol
5789 #define elf_backend_size_dynamic_sections \
5790 bfin_size_dynamic_sections
5791 #define elf_backend_relocate_section bfin_relocate_section
5792 #define elf_backend_finish_dynamic_symbol \
5793 bfin_finish_dynamic_symbol
5794 #define elf_backend_finish_dynamic_sections \
5795 bfin_finish_dynamic_sections
5796 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5797 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5798 #define bfd_elf32_bfd_merge_private_bfd_data \
5799 elf32_bfin_merge_private_bfd_data
5800 #define bfd_elf32_bfd_set_private_flags \
5801 elf32_bfin_set_private_flags
5802 #define bfd_elf32_bfd_print_private_bfd_data \
5803 elf32_bfin_print_private_bfd_data
5804 #define elf_backend_final_write_processing \
5805 elf32_bfin_final_write_processing
5806 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5807 #define elf_backend_can_gc_sections 1
5808 #define elf_backend_special_sections elf32_bfin_special_sections
5809 #define elf_backend_can_refcount 1
5810 #define elf_backend_want_got_plt 0
5811 #define elf_backend_plt_readonly 1
5812 #define elf_backend_want_plt_sym 0
5813 #define elf_backend_got_header_size 12
5814 #define elf_backend_rela_normal 1
5816 #include "elf32-target.h"
5818 #undef TARGET_LITTLE_SYM
5819 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5820 #undef TARGET_LITTLE_NAME
5821 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5823 #define elf32_bed elf32_bfinfdpic_bed
5825 #undef elf_backend_gc_sweep_hook
5826 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5828 #undef elf_backend_got_header_size
5829 #define elf_backend_got_header_size 0
5831 #undef elf_backend_relocate_section
5832 #define elf_backend_relocate_section bfinfdpic_relocate_section
5833 #undef elf_backend_check_relocs
5834 #define elf_backend_check_relocs bfinfdpic_check_relocs
5836 #undef bfd_elf32_bfd_link_hash_table_create
5837 #define bfd_elf32_bfd_link_hash_table_create \
5838 bfinfdpic_elf_link_hash_table_create
5839 #undef elf_backend_always_size_sections
5840 #define elf_backend_always_size_sections \
5841 elf32_bfinfdpic_always_size_sections
5842 #undef elf_backend_modify_program_headers
5843 #define elf_backend_modify_program_headers \
5844 elf32_bfinfdpic_modify_program_headers
5845 #undef bfd_elf32_bfd_copy_private_bfd_data
5846 #define bfd_elf32_bfd_copy_private_bfd_data \
5847 elf32_bfinfdpic_copy_private_bfd_data
5849 #undef elf_backend_create_dynamic_sections
5850 #define elf_backend_create_dynamic_sections \
5851 elf32_bfinfdpic_create_dynamic_sections
5852 #undef elf_backend_adjust_dynamic_symbol
5853 #define elf_backend_adjust_dynamic_symbol \
5854 elf32_bfinfdpic_adjust_dynamic_symbol
5855 #undef elf_backend_size_dynamic_sections
5856 #define elf_backend_size_dynamic_sections \
5857 elf32_bfinfdpic_size_dynamic_sections
5858 #undef elf_backend_finish_dynamic_symbol
5859 #define elf_backend_finish_dynamic_symbol \
5860 elf32_bfinfdpic_finish_dynamic_symbol
5861 #undef elf_backend_finish_dynamic_sections
5862 #define elf_backend_finish_dynamic_sections \
5863 elf32_bfinfdpic_finish_dynamic_sections
5865 #undef elf_backend_discard_info
5866 #define elf_backend_discard_info \
5867 bfinfdpic_elf_discard_info
5868 #undef elf_backend_can_make_relative_eh_frame
5869 #define elf_backend_can_make_relative_eh_frame \
5870 bfinfdpic_elf_use_relative_eh_frame
5871 #undef elf_backend_can_make_lsda_relative_eh_frame
5872 #define elf_backend_can_make_lsda_relative_eh_frame \
5873 bfinfdpic_elf_use_relative_eh_frame
5874 #undef elf_backend_encode_eh_address
5875 #define elf_backend_encode_eh_address \
5876 bfinfdpic_elf_encode_eh_address
5878 #undef elf_backend_may_use_rel_p
5879 #define elf_backend_may_use_rel_p 1
5880 #undef elf_backend_may_use_rela_p
5881 #define elf_backend_may_use_rela_p 1
5882 /* We use REL for dynamic relocations only. */
5883 #undef elf_backend_default_use_rela_p
5884 #define elf_backend_default_use_rela_p 1
5886 #undef elf_backend_omit_section_dynsym
5887 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5889 #include "elf32-target.h"