1 /* XSTORMY16-specific support for 32-bit ELF.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "elf/xstormy16.h"
25 #include "libiberty.h"
27 /* Forward declarations. */
28 static reloc_howto_type * xstormy16_reloc_type_lookup
29 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
30 static void xstormy16_info_to_howto_rela
31 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
32 static bfd_reloc_status_type xstormy16_elf_24_reloc
33 PARAMS ((bfd *abfd, arelent *reloc_entry, asymbol *symbol,
34 PTR data, asection *input_section, bfd *output_bfd,
35 char **error_message));
36 static boolean xstormy16_elf_check_relocs
37 PARAMS ((bfd *, struct bfd_link_info *, asection *,
38 const Elf_Internal_Rela *));
39 static boolean xstormy16_relax_plt_check
40 PARAMS ((struct elf_link_hash_entry *, PTR));
41 static boolean xstormy16_relax_plt_realloc
42 PARAMS ((struct elf_link_hash_entry *, PTR));
43 static boolean xstormy16_elf_relax_section
44 PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
46 static boolean xstormy16_elf_always_size_sections
47 PARAMS ((bfd *, struct bfd_link_info *));
48 static boolean xstormy16_elf_relocate_section
49 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
50 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
51 static boolean xstormy16_elf_finish_dynamic_sections
52 PARAMS((bfd *, struct bfd_link_info *));
53 static boolean xstormy16_elf_gc_sweep_hook
54 PARAMS ((bfd *, struct bfd_link_info *, asection *,
55 const Elf_Internal_Rela *));
56 static asection * xstormy16_elf_gc_mark_hook
57 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
58 struct elf_link_hash_entry *, Elf_Internal_Sym *));
60 static reloc_howto_type xstormy16_elf_howto_table [] =
62 /* This reloc does nothing. */
63 HOWTO (R_XSTORMY16_NONE, /* type */
65 2, /* size (0 = byte, 1 = short, 2 = long) */
67 false, /* pc_relative */
69 complain_overflow_bitfield, /* complain_on_overflow */
70 bfd_elf_generic_reloc, /* special_function */
71 "R_XSTORMY16_NONE", /* name */
72 false, /* partial_inplace */
75 false), /* pcrel_offset */
77 /* A 32 bit absolute relocation. */
78 HOWTO (R_XSTORMY16_32, /* type */
80 2, /* size (0 = byte, 1 = short, 2 = long) */
82 false, /* pc_relative */
84 complain_overflow_dont, /* complain_on_overflow */
85 bfd_elf_generic_reloc, /* special_function */
86 "R_XSTORMY16_32", /* name */
87 false, /* partial_inplace */
89 0xffffffff, /* dst_mask */
90 false), /* pcrel_offset */
92 /* A 16 bit absolute relocation. */
93 HOWTO (R_XSTORMY16_16, /* type */
95 1, /* size (0 = byte, 1 = short, 2 = long) */
97 false, /* pc_relative */
99 complain_overflow_bitfield, /* complain_on_overflow */
100 bfd_elf_generic_reloc, /* special_function */
101 "R_XSTORMY16_16", /* name */
102 false, /* partial_inplace */
104 0xffffffff, /* dst_mask */
105 false), /* pcrel_offset */
107 /* An 8 bit absolute relocation. */
108 HOWTO (R_XSTORMY16_8, /* type */
110 0, /* size (0 = byte, 1 = short, 2 = long) */
112 false, /* pc_relative */
114 complain_overflow_bitfield, /* complain_on_overflow */
115 bfd_elf_generic_reloc, /* special_function */
116 "R_XSTORMY16_8", /* name */
117 false, /* partial_inplace */
119 0xffffffff, /* dst_mask */
120 false), /* pcrel_offset */
122 /* A 32 bit pc-relative relocation. */
123 HOWTO (R_XSTORMY16_PC32, /* type */
125 2, /* size (0 = byte, 1 = short, 2 = long) */
127 true, /* pc_relative */
129 complain_overflow_dont, /* complain_on_overflow */
130 bfd_elf_generic_reloc, /* special_function */
131 "R_XSTORMY16_PC32", /* name */
132 false, /* partial_inplace */
134 0xffffffff, /* dst_mask */
135 true), /* pcrel_offset */
137 /* A 16 bit pc-relative relocation. */
138 HOWTO (R_XSTORMY16_PC16, /* type */
140 1, /* size (0 = byte, 1 = short, 2 = long) */
142 true, /* pc_relative */
144 complain_overflow_signed, /* complain_on_overflow */
145 bfd_elf_generic_reloc, /* special_function */
146 "R_XSTORMY16_PC16", /* name */
147 false, /* partial_inplace */
149 0xffffffff, /* dst_mask */
150 true), /* pcrel_offset */
152 /* An 8 bit pc-relative relocation. */
153 HOWTO (R_XSTORMY16_PC8, /* type */
155 0, /* size (0 = byte, 1 = short, 2 = long) */
157 true, /* pc_relative */
159 complain_overflow_signed, /* complain_on_overflow */
160 bfd_elf_generic_reloc, /* special_function */
161 "R_XSTORMY16_PC8", /* name */
162 false, /* partial_inplace */
164 0xffffffff, /* dst_mask */
165 true), /* pcrel_offset */
167 /* A 12-bit pc-relative relocation suitable for the branch instructions. */
168 HOWTO (R_XSTORMY16_REL_12, /* type */
170 1, /* size (0 = byte, 1 = short, 2 = long) */
172 true, /* pc_relative */
174 complain_overflow_signed, /* complain_on_overflow */
175 bfd_elf_generic_reloc, /* special_function */
176 "R_XSTORMY16_REL_12", /* name */
177 true, /* partial_inplace */
179 0x0fff, /* dst_mask */
180 true), /* pcrel_offset */
182 /* A 24-bit absolute relocation suitable for the jump instructions. */
183 HOWTO (R_XSTORMY16_24, /* type */
185 2, /* size (0 = byte, 1 = short, 2 = long) */
187 false, /* pc_relative */
189 complain_overflow_unsigned, /* complain_on_overflow */
190 xstormy16_elf_24_reloc, /* special_function */
191 "R_XSTORMY16_24", /* name */
192 true, /* partial_inplace */
194 0xffff00ff, /* dst_mask */
195 true), /* pcrel_offset */
197 /* A 16 bit absolute relocation to a function pointer. */
198 HOWTO (R_XSTORMY16_FPTR16, /* type */
200 1, /* size (0 = byte, 1 = short, 2 = long) */
202 false, /* pc_relative */
204 complain_overflow_bitfield, /* complain_on_overflow */
205 bfd_elf_generic_reloc, /* special_function */
206 "R_XSTORMY16_FPTR16", /* name */
207 false, /* partial_inplace */
209 0xffffffff, /* dst_mask */
210 false), /* pcrel_offset */
213 static reloc_howto_type xstormy16_elf_howto_table2 [] =
215 /* GNU extension to record C++ vtable hierarchy */
216 HOWTO (R_XSTORMY16_GNU_VTINHERIT, /* type */
218 2, /* size (0 = byte, 1 = short, 2 = long) */
220 false, /* pc_relative */
222 complain_overflow_dont, /* complain_on_overflow */
223 NULL, /* special_function */
224 "R_XSTORMY16_GNU_VTINHERIT", /* name */
225 false, /* partial_inplace */
228 false), /* pcrel_offset */
230 /* GNU extension to record C++ vtable member usage */
231 HOWTO (R_XSTORMY16_GNU_VTENTRY, /* type */
233 2, /* size (0 = byte, 1 = short, 2 = long) */
235 false, /* pc_relative */
237 complain_overflow_dont, /* complain_on_overflow */
238 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
239 "R_XSTORMY16_GNU_VTENTRY", /* name */
240 false, /* partial_inplace */
243 false), /* pcrel_offset */
247 /* Map BFD reloc types to XSTORMY16 ELF reloc types. */
249 typedef struct xstormy16_reloc_map
251 bfd_reloc_code_real_type bfd_reloc_val;
252 unsigned int xstormy16_reloc_val;
253 reloc_howto_type * table;
256 static const reloc_map xstormy16_reloc_map [] =
258 { BFD_RELOC_NONE, R_XSTORMY16_NONE, xstormy16_elf_howto_table },
259 { BFD_RELOC_32, R_XSTORMY16_32, xstormy16_elf_howto_table },
260 { BFD_RELOC_16, R_XSTORMY16_16, xstormy16_elf_howto_table },
261 { BFD_RELOC_8, R_XSTORMY16_8, xstormy16_elf_howto_table },
262 { BFD_RELOC_32_PCREL, R_XSTORMY16_PC32, xstormy16_elf_howto_table },
263 { BFD_RELOC_16_PCREL, R_XSTORMY16_PC16, xstormy16_elf_howto_table },
264 { BFD_RELOC_8_PCREL, R_XSTORMY16_PC8, xstormy16_elf_howto_table },
265 { BFD_RELOC_XSTORMY16_REL_12, R_XSTORMY16_REL_12, xstormy16_elf_howto_table },
266 { BFD_RELOC_XSTORMY16_24, R_XSTORMY16_24, xstormy16_elf_howto_table },
267 { BFD_RELOC_XSTORMY16_FPTR16, R_XSTORMY16_FPTR16, xstormy16_elf_howto_table },
268 { BFD_RELOC_VTABLE_INHERIT, R_XSTORMY16_GNU_VTINHERIT, xstormy16_elf_howto_table2 },
269 { BFD_RELOC_VTABLE_ENTRY, R_XSTORMY16_GNU_VTENTRY, xstormy16_elf_howto_table2 },
272 static reloc_howto_type *
273 xstormy16_reloc_type_lookup (abfd, code)
274 bfd * abfd ATTRIBUTE_UNUSED;
275 bfd_reloc_code_real_type code;
279 for (i = ARRAY_SIZE (xstormy16_reloc_map); --i;)
281 const reloc_map * entry;
283 entry = xstormy16_reloc_map + i;
285 if (entry->bfd_reloc_val == code)
286 return entry->table + (entry->xstormy16_reloc_val
287 - entry->table[0].type);
293 /* Set the howto pointer for an XSTORMY16 ELF reloc. */
296 xstormy16_info_to_howto_rela (abfd, cache_ptr, dst)
297 bfd * abfd ATTRIBUTE_UNUSED;
299 Elf32_Internal_Rela * dst;
301 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
303 if (r_type <= (unsigned int) R_XSTORMY16_FPTR16)
304 cache_ptr->howto = &xstormy16_elf_howto_table [r_type];
305 else if (r_type - R_XSTORMY16_GNU_VTINHERIT
306 <= (unsigned int) R_XSTORMY16_GNU_VTENTRY)
308 = &xstormy16_elf_howto_table2 [r_type - R_XSTORMY16_GNU_VTINHERIT];
313 /* Handle the R_XSTORMY16_24 reloc, which has an odd bit arrangement. */
315 static bfd_reloc_status_type
316 xstormy16_elf_24_reloc (abfd, reloc_entry, symbol, data, input_section,
317 output_bfd, error_message)
319 arelent *reloc_entry;
322 asection *input_section;
324 char **error_message ATTRIBUTE_UNUSED;
326 bfd_vma relocation, x;
328 if (output_bfd != NULL)
330 reloc_entry->address += input_section->output_offset;
334 if (reloc_entry->address > input_section->_cooked_size)
335 return bfd_reloc_outofrange;
337 if (bfd_is_com_section (symbol->section))
340 relocation = symbol->value;
342 relocation += symbol->section->output_section->vma;
343 relocation += symbol->section->output_offset;
344 relocation += reloc_entry->addend;
346 x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
348 x |= relocation & 0xff;
349 x |= (relocation << 8) & 0xffff0000;
350 bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
352 if (relocation & ~ (bfd_vma) 0xffffff)
353 return bfd_reloc_overflow;
358 /* We support 16-bit pointers to code above 64k by generating a thunk
359 below 64k containing a JMPF instruction to the final address. We
360 cannot, unfortunately, minimize the number of thunks unless the
361 -relax switch is given, as otherwise we have no idea where the
362 sections will fall in the address space. */
365 xstormy16_elf_check_relocs (abfd, info, sec, relocs)
367 struct bfd_link_info *info;
369 const Elf_Internal_Rela *relocs;
371 const Elf_Internal_Rela *rel, *relend;
372 struct elf_link_hash_entry **sym_hashes;
373 Elf_Internal_Shdr *symtab_hdr;
374 bfd_vma *local_plt_offsets;
378 if (info->relocateable)
381 symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
382 sym_hashes = elf_sym_hashes (abfd);
383 local_plt_offsets = elf_local_got_offsets (abfd);
385 dynobj = elf_hash_table(info)->dynobj;
387 relend = relocs + sec->reloc_count;
388 for (rel = relocs; rel < relend; ++rel)
390 unsigned long r_symndx;
391 struct elf_link_hash_entry *h;
394 r_symndx = ELF32_R_SYM (rel->r_info);
395 if (r_symndx < symtab_hdr->sh_info)
399 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
400 while (h->root.type == bfd_link_hash_indirect
401 || h->root.type == bfd_link_hash_warning)
402 h = (struct elf_link_hash_entry *) h->root.u.i.link;
405 switch (ELF32_R_TYPE (rel->r_info))
407 /* This relocation describes a 16-bit pointer to a function.
408 We may need to allocate a thunk in low memory; reserve memory
410 case R_XSTORMY16_FPTR16:
411 if (rel->r_addend != 0)
413 (*info->callbacks->warning)
414 (info, _("non-zero addend in @fptr reloc"), 0,
419 elf_hash_table (info)->dynobj = dynobj = abfd;
422 splt = bfd_get_section_by_name (dynobj, ".plt");
425 splt = bfd_make_section (dynobj, ".plt");
427 || ! bfd_set_section_flags (dynobj, splt,
435 || ! bfd_set_section_alignment (dynobj, splt, 1))
441 offset = &h->plt.offset;
444 if (local_plt_offsets == NULL)
449 size = symtab_hdr->sh_info * sizeof (bfd_vma);
450 local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
451 if (local_plt_offsets == NULL)
453 elf_local_got_offsets (abfd) = local_plt_offsets;
455 for (i = 0; i < symtab_hdr->sh_info; i++)
456 local_plt_offsets[i] = (bfd_vma) -1;
458 offset = &local_plt_offsets[r_symndx];
461 if (*offset == (bfd_vma) -1)
463 *offset = splt->_raw_size;
464 splt->_raw_size += 4;
468 /* This relocation describes the C++ object vtable hierarchy.
469 Reconstruct it for later use during GC. */
470 case R_XSTORMY16_GNU_VTINHERIT:
471 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
475 /* This relocation describes which C++ vtable entries are actually
476 used. Record for later use during GC. */
477 case R_XSTORMY16_GNU_VTENTRY:
478 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
487 /* A subroutine of xstormy16_elf_relax_section. If the global symbol H
488 is within the low 64k, remove any entry for it in the plt. */
490 struct relax_plt_data
497 xstormy16_relax_plt_check (h, xdata)
498 struct elf_link_hash_entry *h;
501 struct relax_plt_data *data = (struct relax_plt_data *) xdata;
503 if (h->root.type == bfd_link_hash_warning)
504 h = (struct elf_link_hash_entry *) h->root.u.i.link;
506 if (h->plt.offset != (bfd_vma) -1)
510 if (h->root.type == bfd_link_hash_undefined
511 || h->root.type == bfd_link_hash_undefweak)
514 address = (h->root.u.def.section->output_section->vma
515 + h->root.u.def.section->output_offset
516 + h->root.u.def.value);
518 if (address <= 0xffff)
521 data->splt->_cooked_size -= 4;
529 /* A subroutine of xstormy16_elf_relax_section. If the global symbol H
530 previously had a plt entry, give it a new entry offset. */
533 xstormy16_relax_plt_realloc (h, xdata)
534 struct elf_link_hash_entry *h;
537 bfd_vma *entry = (bfd_vma *) xdata;
539 if (h->root.type == bfd_link_hash_warning)
540 h = (struct elf_link_hash_entry *) h->root.u.i.link;
542 if (h->plt.offset != (bfd_vma) -1)
544 h->plt.offset = *entry;
552 xstormy16_elf_relax_section (dynobj, splt, info, again)
555 struct bfd_link_info *info;
558 struct relax_plt_data relax_plt_data;
561 /* Assume nothing changes. */
564 if (info->relocateable)
567 /* We only relax the .plt section at the moment. */
568 if (dynobj != elf_hash_table (info)->dynobj
569 || strcmp (splt->name, ".plt") != 0)
572 /* Quick check for an empty plt. */
573 if (splt->_raw_size == 0)
576 /* If this is the first time we have been called for this section,
577 initialize the cooked size. */
578 if (splt->_cooked_size == 0)
579 splt->_cooked_size = splt->_raw_size;
581 /* Map across all global symbols; see which ones happen to
582 fall in the low 64k. */
583 relax_plt_data.splt = splt;
584 relax_plt_data.again = again;
585 elf_link_hash_traverse (elf_hash_table (info), xstormy16_relax_plt_check,
588 /* Likewise for local symbols, though that's somewhat less convenient
589 as we have to walk the list of input bfds and swap in symbol data. */
590 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
592 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
593 Elf_Internal_Shdr *symtab_hdr;
594 Elf_Internal_Sym *isymbuf = NULL;
597 if (! local_plt_offsets)
600 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
601 if (symtab_hdr->sh_info != 0)
603 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
605 isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
606 symtab_hdr->sh_info, 0,
612 for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
614 Elf_Internal_Sym *isym;
618 if (local_plt_offsets[idx] == (bfd_vma) -1)
621 isym = &isymbuf[idx];
622 if (isym->st_shndx == SHN_UNDEF)
624 else if (isym->st_shndx == SHN_ABS)
625 tsec = bfd_abs_section_ptr;
626 else if (isym->st_shndx == SHN_COMMON)
627 tsec = bfd_com_section_ptr;
629 tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
631 address = (tsec->output_section->vma
632 + tsec->output_offset
634 if (address <= 0xffff)
636 local_plt_offsets[idx] = -1;
637 splt->_cooked_size -= 4;
643 && symtab_hdr->contents != (unsigned char *) isymbuf)
645 if (! info->keep_memory)
649 /* Cache the symbols for elf_link_input_bfd. */
650 symtab_hdr->contents = (unsigned char *) isymbuf;
655 /* If we changed anything, walk the symbols again to reallocate
656 .plt entry addresses. */
657 if (*again && splt->_cooked_size > 0)
661 elf_link_hash_traverse (elf_hash_table (info),
662 xstormy16_relax_plt_realloc, &entry);
664 for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
666 bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
667 unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
670 if (! local_plt_offsets)
673 for (idx = 0; idx < nlocals; ++idx)
674 if (local_plt_offsets[idx] != (bfd_vma) -1)
676 local_plt_offsets[idx] = entry;
682 splt->_raw_size = splt->_cooked_size;
687 xstormy16_elf_always_size_sections (output_bfd, info)
688 bfd *output_bfd ATTRIBUTE_UNUSED;
689 struct bfd_link_info *info;
694 if (info->relocateable)
697 dynobj = elf_hash_table (info)->dynobj;
701 splt = bfd_get_section_by_name (dynobj, ".plt");
702 BFD_ASSERT (splt != NULL);
704 splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->_raw_size);
705 if (splt->contents == NULL)
711 /* Relocate an XSTORMY16 ELF section.
712 There is some attempt to make this function usable for many architectures,
713 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
714 if only to serve as a learning tool.
716 The RELOCATE_SECTION function is called by the new ELF backend linker
717 to handle the relocations for a section.
719 The relocs are always passed as Rela structures; if the section
720 actually uses Rel structures, the r_addend field will always be
723 This function is responsible for adjusting the section contents as
724 necessary, and (if using Rela relocs and generating a relocateable
725 output file) adjusting the reloc addend as necessary.
727 This function does not have to worry about setting the reloc
728 address or the reloc symbol index.
730 LOCAL_SYMS is a pointer to the swapped in local symbols.
732 LOCAL_SECTIONS is an array giving the section in the input file
733 corresponding to the st_shndx field of each local symbol.
735 The global hash table entry for the global symbols can be found
736 via elf_sym_hashes (input_bfd).
738 When generating relocateable output, this function must handle
739 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
740 going to be the section symbol corresponding to the output
741 section, which means that the addend must be adjusted
745 xstormy16_elf_relocate_section (output_bfd, info, input_bfd, input_section,
746 contents, relocs, local_syms, local_sections)
747 bfd * output_bfd ATTRIBUTE_UNUSED;
748 struct bfd_link_info * info;
750 asection * input_section;
752 Elf_Internal_Rela * relocs;
753 Elf_Internal_Sym * local_syms;
754 asection ** local_sections;
756 Elf_Internal_Shdr * symtab_hdr;
757 struct elf_link_hash_entry ** sym_hashes;
758 Elf_Internal_Rela * rel;
759 Elf_Internal_Rela * relend;
763 if (info->relocateable)
766 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
767 sym_hashes = elf_sym_hashes (input_bfd);
768 relend = relocs + input_section->reloc_count;
770 dynobj = elf_hash_table (info)->dynobj;
773 splt = bfd_get_section_by_name (dynobj, ".plt");
775 for (rel = relocs; rel < relend; rel ++)
777 reloc_howto_type * howto;
778 unsigned long r_symndx;
779 Elf_Internal_Sym * sym;
781 struct elf_link_hash_entry * h;
783 bfd_reloc_status_type r;
784 const char * name = NULL;
787 r_type = ELF32_R_TYPE (rel->r_info);
789 if ( r_type == R_XSTORMY16_GNU_VTINHERIT
790 || r_type == R_XSTORMY16_GNU_VTENTRY)
793 r_symndx = ELF32_R_SYM (rel->r_info);
794 howto = xstormy16_elf_howto_table + ELF32_R_TYPE (rel->r_info);
799 if (r_symndx < symtab_hdr->sh_info)
801 sym = local_syms + r_symndx;
802 sec = local_sections [r_symndx];
803 relocation = (sec->output_section->vma
807 name = bfd_elf_string_from_elf_section
808 (input_bfd, symtab_hdr->sh_link, sym->st_name);
809 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
813 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
815 while (h->root.type == bfd_link_hash_indirect
816 || h->root.type == bfd_link_hash_warning)
817 h = (struct elf_link_hash_entry *) h->root.u.i.link;
819 name = h->root.root.string;
821 if (h->root.type == bfd_link_hash_defined
822 || h->root.type == bfd_link_hash_defweak)
824 sec = h->root.u.def.section;
825 relocation = (h->root.u.def.value
826 + sec->output_section->vma
827 + sec->output_offset);
829 else if (h->root.type == bfd_link_hash_undefweak)
835 if (! ((*info->callbacks->undefined_symbol)
836 (info, h->root.root.string, input_bfd,
837 input_section, rel->r_offset, true)))
843 switch (ELF32_R_TYPE (rel->r_info))
847 bfd_vma reloc = relocation + rel->r_addend;
850 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
853 x |= (reloc << 8) & 0xffff0000;
854 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
856 if (reloc & ~0xffffff)
857 r = bfd_reloc_overflow;
863 case R_XSTORMY16_FPTR16:
868 plt_offset = &h->plt.offset;
870 plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
872 if (relocation <= 0xffff)
874 /* If the symbol is in range for a 16-bit address, we should
875 have deallocated the plt entry in relax_section. */
876 BFD_ASSERT (*plt_offset == (bfd_vma) -1);
880 /* If the symbol is out of range for a 16-bit address,
881 we must have allocated a plt entry. */
882 BFD_ASSERT (*plt_offset != (bfd_vma) -1);
884 /* If this is the first time we've processed this symbol,
885 fill in the plt entry with the correct symbol address. */
886 if ((*plt_offset & 1) == 0)
890 x = 0x00000200; /* jmpf */
891 x |= relocation & 0xff;
892 x |= (relocation << 8) & 0xffff0000;
893 bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
897 relocation = (splt->output_section->vma
898 + splt->output_offset
899 + (*plt_offset & -2));
901 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
902 contents, rel->r_offset,
908 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
909 contents, rel->r_offset,
910 relocation, rel->r_addend);
914 if (r != bfd_reloc_ok)
916 const char * msg = (const char *) NULL;
920 case bfd_reloc_overflow:
921 r = info->callbacks->reloc_overflow
922 (info, name, howto->name, (bfd_vma) 0,
923 input_bfd, input_section, rel->r_offset);
926 case bfd_reloc_undefined:
927 r = info->callbacks->undefined_symbol
928 (info, name, input_bfd, input_section, rel->r_offset,
932 case bfd_reloc_outofrange:
933 msg = _("internal error: out of range error");
936 case bfd_reloc_notsupported:
937 msg = _("internal error: unsupported relocation error");
940 case bfd_reloc_dangerous:
941 msg = _("internal error: dangerous relocation");
945 msg = _("internal error: unknown error");
950 r = info->callbacks->warning
951 (info, msg, name, input_bfd, input_section, rel->r_offset);
961 /* This must exist if dynobj is ever set. */
964 xstormy16_elf_finish_dynamic_sections (abfd, info)
965 bfd *abfd ATTRIBUTE_UNUSED;
966 struct bfd_link_info *info;
971 /* As an extra sanity check, verify that all plt entries have
974 if ((dynobj = elf_hash_table (info)->dynobj) != NULL
975 && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
977 bfd_byte *contents = splt->contents;
978 unsigned int i, size = splt->_raw_size;
979 for (i = 0; i < size; i += 4)
981 unsigned int x = bfd_get_32 (dynobj, contents + i);
989 /* Return the section that should be marked against GC for a given
993 xstormy16_elf_gc_mark_hook (sec, info, rel, h, sym)
995 struct bfd_link_info * info ATTRIBUTE_UNUSED;
996 Elf_Internal_Rela * rel;
997 struct elf_link_hash_entry * h;
998 Elf_Internal_Sym * sym;
1002 switch (ELF32_R_TYPE (rel->r_info))
1004 case R_XSTORMY16_GNU_VTINHERIT:
1005 case R_XSTORMY16_GNU_VTENTRY:
1009 switch (h->root.type)
1011 case bfd_link_hash_defined:
1012 case bfd_link_hash_defweak:
1013 return h->root.u.def.section;
1015 case bfd_link_hash_common:
1016 return h->root.u.c.p->section;
1024 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1029 /* Update the got entry reference counts for the section being removed. */
1032 xstormy16_elf_gc_sweep_hook (abfd, info, sec, relocs)
1033 bfd * abfd ATTRIBUTE_UNUSED;
1034 struct bfd_link_info * info ATTRIBUTE_UNUSED;
1035 asection * sec ATTRIBUTE_UNUSED;
1036 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
1041 #define ELF_ARCH bfd_arch_xstormy16
1042 #define ELF_MACHINE_CODE EM_XSTORMY16
1043 #define ELF_MAXPAGESIZE 0x100
1045 #define TARGET_LITTLE_SYM bfd_elf32_xstormy16_vec
1046 #define TARGET_LITTLE_NAME "elf32-xstormy16"
1048 #define elf_info_to_howto_rel NULL
1049 #define elf_info_to_howto xstormy16_info_to_howto_rela
1050 #define elf_backend_relocate_section xstormy16_elf_relocate_section
1051 #define elf_backend_gc_mark_hook xstormy16_elf_gc_mark_hook
1052 #define elf_backend_gc_sweep_hook xstormy16_elf_gc_sweep_hook
1053 #define elf_backend_check_relocs xstormy16_elf_check_relocs
1054 #define elf_backend_always_size_sections \
1055 xstormy16_elf_always_size_sections
1056 #define elf_backend_finish_dynamic_sections \
1057 xstormy16_elf_finish_dynamic_sections
1059 #define elf_backend_can_gc_sections 1
1060 #define elf_backend_rela_normal 1
1062 #define bfd_elf32_bfd_reloc_type_lookup xstormy16_reloc_type_lookup
1063 #define bfd_elf32_bfd_relax_section xstormy16_elf_relax_section
1065 #include "elf32-target.h"