1 /* Motorola 68HC11/HC12-specific support for 32-bit ELF
2 Copyright 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Contributed by Stephane Carrez (stcarrez@nerim.fr)
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "elf32-m68hc1x.h"
28 #include "elf/m68hc11.h"
29 #include "opcode/m68hc11.h"
32 #define m68hc12_stub_hash_lookup(table, string, create, copy) \
33 ((struct elf32_m68hc11_stub_hash_entry *) \
34 bfd_hash_lookup ((table), (string), (create), (copy)))
36 static struct elf32_m68hc11_stub_hash_entry* m68hc12_add_stub
37 (const char *stub_name,
39 struct m68hc11_elf_link_hash_table *htab);
41 static struct bfd_hash_entry *stub_hash_newfunc
42 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
44 static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info,
45 const char* name, bfd_vma value,
48 static bfd_boolean m68hc11_elf_export_one_stub
49 (struct bfd_hash_entry *gen_entry, void *in_arg);
51 static void scan_sections_for_abi (bfd*, asection*, PTR);
53 struct m68hc11_scan_param
55 struct m68hc11_page_info* pinfo;
56 bfd_boolean use_memory_banks;
60 /* Create a 68HC11/68HC12 ELF linker hash table. */
62 struct m68hc11_elf_link_hash_table*
63 m68hc11_elf_hash_table_create (bfd *abfd)
65 struct m68hc11_elf_link_hash_table *ret;
66 bfd_size_type amt = sizeof (struct m68hc11_elf_link_hash_table);
68 ret = (struct m68hc11_elf_link_hash_table *) bfd_malloc (amt);
69 if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
73 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
74 _bfd_elf_link_hash_newfunc))
80 /* Init the stub hash table too. */
81 amt = sizeof (struct bfd_hash_table);
82 ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt);
83 if (ret->stub_hash_table == NULL)
88 if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc))
92 ret->stub_section = 0;
93 ret->add_stub_section = NULL;
94 ret->sym_sec.abfd = NULL;
99 /* Free the derived linker hash table. */
102 m68hc11_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash)
104 struct m68hc11_elf_link_hash_table *ret
105 = (struct m68hc11_elf_link_hash_table *) hash;
107 bfd_hash_table_free (ret->stub_hash_table);
108 free (ret->stub_hash_table);
109 _bfd_generic_link_hash_table_free (hash);
112 /* Assorted hash table functions. */
114 /* Initialize an entry in the stub hash table. */
116 static struct bfd_hash_entry *
117 stub_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table,
120 /* Allocate the structure if it has not already been allocated by a
124 entry = bfd_hash_allocate (table,
125 sizeof (struct elf32_m68hc11_stub_hash_entry));
130 /* Call the allocation method of the superclass. */
131 entry = bfd_hash_newfunc (entry, table, string);
134 struct elf32_m68hc11_stub_hash_entry *eh;
136 /* Initialize the local fields. */
137 eh = (struct elf32_m68hc11_stub_hash_entry *) entry;
140 eh->target_value = 0;
141 eh->target_section = NULL;
147 /* Add a new stub entry to the stub hash. Not all fields of the new
148 stub entry are initialised. */
150 static struct elf32_m68hc11_stub_hash_entry *
151 m68hc12_add_stub (const char *stub_name, asection *section,
152 struct m68hc11_elf_link_hash_table *htab)
154 struct elf32_m68hc11_stub_hash_entry *stub_entry;
156 /* Enter this entry into the linker stub hash table. */
157 stub_entry = m68hc12_stub_hash_lookup (htab->stub_hash_table, stub_name,
159 if (stub_entry == NULL)
161 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
162 bfd_archive_filename (section->owner),
167 if (htab->stub_section == 0)
169 htab->stub_section = (*htab->add_stub_section) (".tramp",
170 htab->tramp_section);
173 stub_entry->stub_sec = htab->stub_section;
174 stub_entry->stub_offset = 0;
178 /* Hook called by the linker routine which adds symbols from an object
179 file. We use it for identify far symbols and force a loading of
180 the trampoline handler. */
183 elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
184 Elf_Internal_Sym *sym,
185 const char **namep ATTRIBUTE_UNUSED,
186 flagword *flagsp ATTRIBUTE_UNUSED,
187 asection **secp ATTRIBUTE_UNUSED,
188 bfd_vma *valp ATTRIBUTE_UNUSED)
190 if (sym->st_other & STO_M68HC12_FAR)
192 struct elf_link_hash_entry *h;
194 h = (struct elf_link_hash_entry *)
195 bfd_link_hash_lookup (info->hash, "__far_trampoline",
196 FALSE, FALSE, FALSE);
199 struct bfd_link_hash_entry* entry = NULL;
201 _bfd_generic_link_add_one_symbol (info, abfd,
205 (bfd_vma) 0, (const char*) NULL,
206 FALSE, FALSE, &entry);
213 /* External entry points for sizing and building linker stubs. */
215 /* Set up various things so that we can make a list of input sections
216 for each output section included in the link. Returns -1 on error,
217 0 when no stubs will be needed, and 1 on success. */
220 elf32_m68hc11_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
223 unsigned int bfd_count;
224 int top_id, top_index;
226 asection **input_list, **list;
228 asection *text_section;
229 struct m68hc11_elf_link_hash_table *htab;
231 htab = m68hc11_elf_hash_table (info);
233 if (htab->root.root.creator->flavour != bfd_target_elf_flavour)
236 /* Count the number of input BFDs and find the top input section id.
237 Also search for an existing ".tramp" section so that we know
238 where generated trampolines must go. Default to ".text" if we
240 htab->tramp_section = 0;
242 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
244 input_bfd = input_bfd->link_next)
247 for (section = input_bfd->sections;
249 section = section->next)
251 const char* name = bfd_get_section_name (input_bfd, section);
253 if (!strcmp (name, ".tramp"))
254 htab->tramp_section = section;
256 if (!strcmp (name, ".text"))
257 text_section = section;
259 if (top_id < section->id)
260 top_id = section->id;
263 htab->bfd_count = bfd_count;
264 if (htab->tramp_section == 0)
265 htab->tramp_section = text_section;
267 /* We can't use output_bfd->section_count here to find the top output
268 section index as some sections may have been removed, and
269 _bfd_strip_section_from_output doesn't renumber the indices. */
270 for (section = output_bfd->sections, top_index = 0;
272 section = section->next)
274 if (top_index < section->index)
275 top_index = section->index;
278 htab->top_index = top_index;
279 amt = sizeof (asection *) * (top_index + 1);
280 input_list = (asection **) bfd_malloc (amt);
281 htab->input_list = input_list;
282 if (input_list == NULL)
285 /* For sections we aren't interested in, mark their entries with a
286 value we can check later. */
287 list = input_list + top_index;
289 *list = bfd_abs_section_ptr;
290 while (list-- != input_list);
292 for (section = output_bfd->sections;
294 section = section->next)
296 if ((section->flags & SEC_CODE) != 0)
297 input_list[section->index] = NULL;
303 /* Determine and set the size of the stub section for a final link.
305 The basic idea here is to examine all the relocations looking for
306 PC-relative calls to a target that is unreachable with a "bl"
310 elf32_m68hc11_size_stubs (bfd *output_bfd, bfd *stub_bfd,
311 struct bfd_link_info *info,
312 asection * (*add_stub_section) (const char*, asection*))
316 Elf_Internal_Sym *local_syms, **all_local_syms;
317 unsigned int bfd_indx, bfd_count;
321 struct m68hc11_elf_link_hash_table *htab = m68hc11_elf_hash_table (info);
323 /* Stash our params away. */
324 htab->stub_bfd = stub_bfd;
325 htab->add_stub_section = add_stub_section;
327 /* Count the number of input BFDs and find the top input section id. */
328 for (input_bfd = info->input_bfds, bfd_count = 0;
330 input_bfd = input_bfd->link_next)
335 /* We want to read in symbol extension records only once. To do this
336 we need to read in the local symbols in parallel and save them for
337 later use; so hold pointers to the local symbols in an array. */
338 amt = sizeof (Elf_Internal_Sym *) * bfd_count;
339 all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
340 if (all_local_syms == NULL)
343 /* Walk over all the input BFDs, swapping in local symbols. */
344 for (input_bfd = info->input_bfds, bfd_indx = 0;
346 input_bfd = input_bfd->link_next, bfd_indx++)
348 Elf_Internal_Shdr *symtab_hdr;
350 /* We'll need the symbol table in a second. */
351 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
352 if (symtab_hdr->sh_info == 0)
355 /* We need an array of the local symbols attached to the input bfd. */
356 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
357 if (local_syms == NULL)
359 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
360 symtab_hdr->sh_info, 0,
362 /* Cache them for elf_link_input_bfd. */
363 symtab_hdr->contents = (unsigned char *) local_syms;
365 if (local_syms == NULL)
367 free (all_local_syms);
371 all_local_syms[bfd_indx] = local_syms;
374 for (input_bfd = info->input_bfds, bfd_indx = 0;
376 input_bfd = input_bfd->link_next, bfd_indx++)
378 Elf_Internal_Shdr *symtab_hdr;
379 Elf_Internal_Sym *local_syms;
380 struct elf_link_hash_entry ** sym_hashes;
382 sym_hashes = elf_sym_hashes (input_bfd);
384 /* We'll need the symbol table in a second. */
385 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
386 if (symtab_hdr->sh_info == 0)
389 local_syms = all_local_syms[bfd_indx];
391 /* Walk over each section attached to the input bfd. */
392 for (section = input_bfd->sections;
394 section = section->next)
396 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
398 /* If there aren't any relocs, then there's nothing more
400 if ((section->flags & SEC_RELOC) == 0
401 || section->reloc_count == 0)
404 /* If this section is a link-once section that will be
405 discarded, then don't create any stubs. */
406 if (section->output_section == NULL
407 || section->output_section->owner != output_bfd)
410 /* Get the relocs. */
412 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
413 (Elf_Internal_Rela *) NULL,
415 if (internal_relocs == NULL)
416 goto error_ret_free_local;
418 /* Now examine each relocation. */
419 irela = internal_relocs;
420 irelaend = irela + section->reloc_count;
421 for (; irela < irelaend; irela++)
423 unsigned int r_type, r_indx;
424 struct elf32_m68hc11_stub_hash_entry *stub_entry;
427 struct elf_link_hash_entry *hash;
428 const char *stub_name;
429 Elf_Internal_Sym *sym;
431 r_type = ELF32_R_TYPE (irela->r_info);
433 /* Only look at 16-bit relocs. */
434 if (r_type != (unsigned int) R_M68HC11_16)
437 /* Now determine the call target, its name, value,
439 r_indx = ELF32_R_SYM (irela->r_info);
440 if (r_indx < symtab_hdr->sh_info)
442 /* It's a local symbol. */
443 Elf_Internal_Shdr *hdr;
446 sym = local_syms + r_indx;
447 is_far = (sym && (sym->st_other & STO_M68HC12_FAR));
451 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
452 sym_sec = hdr->bfd_section;
453 stub_name = (bfd_elf_string_from_elf_section
454 (input_bfd, symtab_hdr->sh_link,
456 sym_value = sym->st_value;
461 /* It's an external symbol. */
464 e_indx = r_indx - symtab_hdr->sh_info;
465 hash = (struct elf_link_hash_entry *)
466 (sym_hashes[e_indx]);
468 while (hash->root.type == bfd_link_hash_indirect
469 || hash->root.type == bfd_link_hash_warning)
470 hash = ((struct elf_link_hash_entry *)
471 hash->root.u.i.link);
473 if (hash->root.type == bfd_link_hash_defined
474 || hash->root.type == bfd_link_hash_defweak)
476 if (!(hash->other & STO_M68HC12_FAR))
479 else if (hash->root.type == bfd_link_hash_undefweak)
483 else if (hash->root.type == bfd_link_hash_undefined)
489 bfd_set_error (bfd_error_bad_value);
490 goto error_ret_free_internal;
492 sym_sec = hash->root.u.def.section;
493 sym_value = hash->root.u.def.value;
494 stub_name = hash->root.root.string;
498 goto error_ret_free_internal;
500 stub_entry = m68hc12_stub_hash_lookup
501 (htab->stub_hash_table,
504 if (stub_entry == NULL)
506 if (add_stub_section == 0)
509 stub_entry = m68hc12_add_stub (stub_name, section, htab);
510 if (stub_entry == NULL)
512 error_ret_free_internal:
513 if (elf_section_data (section)->relocs == NULL)
514 free (internal_relocs);
515 goto error_ret_free_local;
519 stub_entry->target_value = sym_value;
520 stub_entry->target_section = sym_sec;
523 /* We're done with the internal relocs, free them. */
524 if (elf_section_data (section)->relocs == NULL)
525 free (internal_relocs);
529 if (add_stub_section)
531 /* OK, we've added some stubs. Find out the new size of the
533 for (stub_sec = htab->stub_bfd->sections;
535 stub_sec = stub_sec->next)
540 bfd_hash_traverse (htab->stub_hash_table, htab->size_one_stub, htab);
542 free (all_local_syms);
545 error_ret_free_local:
546 free (all_local_syms);
550 /* Export the trampoline addresses in the symbol table. */
552 m68hc11_elf_export_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
554 struct bfd_link_info *info;
555 struct m68hc11_elf_link_hash_table *htab;
556 struct elf32_m68hc11_stub_hash_entry *stub_entry;
560 info = (struct bfd_link_info *) in_arg;
561 htab = m68hc11_elf_hash_table (info);
563 /* Massage our args to the form they really have. */
564 stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
566 /* Generate the trampoline according to HC11 or HC12. */
567 result = (* htab->build_one_stub) (gen_entry, in_arg);
569 /* Make a printable name that does not conflict with the real function. */
570 name = alloca (strlen (stub_entry->root.string) + 16);
571 sprintf (name, "tramp.%s", stub_entry->root.string);
573 /* Export the symbol for debugging/disassembling. */
574 m68hc11_elf_set_symbol (htab->stub_bfd, info, name,
575 stub_entry->stub_offset,
576 stub_entry->stub_sec);
580 /* Export a symbol or set its value and section. */
582 m68hc11_elf_set_symbol (bfd *abfd, struct bfd_link_info *info,
583 const char *name, bfd_vma value, asection *sec)
585 struct elf_link_hash_entry *h;
587 h = (struct elf_link_hash_entry *)
588 bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, FALSE);
591 _bfd_generic_link_add_one_symbol (info, abfd,
601 h->root.type = bfd_link_hash_defined;
602 h->root.u.def.value = value;
603 h->root.u.def.section = sec;
608 /* Build all the stubs associated with the current output file. The
609 stubs are kept in a hash table attached to the main linker hash
610 table. This function is called via m68hc12elf_finish in the
614 elf32_m68hc11_build_stubs (bfd *abfd, struct bfd_link_info *info)
617 struct bfd_hash_table *table;
618 struct m68hc11_elf_link_hash_table *htab;
619 struct m68hc11_scan_param param;
621 m68hc11_elf_get_bank_parameters (info);
622 htab = m68hc11_elf_hash_table (info);
624 for (stub_sec = htab->stub_bfd->sections;
626 stub_sec = stub_sec->next)
630 /* Allocate memory to hold the linker stubs. */
631 size = stub_sec->size;
632 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
633 if (stub_sec->contents == NULL && size != 0)
638 /* Build the stubs as directed by the stub hash table. */
639 table = htab->stub_hash_table;
640 bfd_hash_traverse (table, m68hc11_elf_export_one_stub, info);
642 /* Scan the output sections to see if we use the memory banks.
643 If so, export the symbols that define how the memory banks
644 are mapped. This is used by gdb and the simulator to obtain
645 the information. It can be used by programs to burn the eprom
646 at the good addresses. */
647 param.use_memory_banks = FALSE;
648 param.pinfo = &htab->pinfo;
649 bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m);
650 if (param.use_memory_banks)
652 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_START_NAME,
653 htab->pinfo.bank_physical,
654 bfd_abs_section_ptr);
655 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_VIRTUAL_NAME,
656 htab->pinfo.bank_virtual,
657 bfd_abs_section_ptr);
658 m68hc11_elf_set_symbol (abfd, info, BFD_M68HC11_BANK_SIZE_NAME,
659 htab->pinfo.bank_size,
660 bfd_abs_section_ptr);
667 m68hc11_elf_get_bank_parameters (struct bfd_link_info *info)
670 struct m68hc11_page_info *pinfo;
671 struct bfd_link_hash_entry *h;
673 pinfo = &m68hc11_elf_hash_table (info)->pinfo;
674 if (pinfo->bank_param_initialized)
677 pinfo->bank_virtual = M68HC12_BANK_VIRT;
678 pinfo->bank_mask = M68HC12_BANK_MASK;
679 pinfo->bank_physical = M68HC12_BANK_BASE;
680 pinfo->bank_shift = M68HC12_BANK_SHIFT;
681 pinfo->bank_size = 1 << M68HC12_BANK_SHIFT;
683 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_START_NAME,
685 if (h != (struct bfd_link_hash_entry*) NULL
686 && h->type == bfd_link_hash_defined)
687 pinfo->bank_physical = (h->u.def.value
688 + h->u.def.section->output_section->vma
689 + h->u.def.section->output_offset);
691 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_VIRTUAL_NAME,
693 if (h != (struct bfd_link_hash_entry*) NULL
694 && h->type == bfd_link_hash_defined)
695 pinfo->bank_virtual = (h->u.def.value
696 + h->u.def.section->output_section->vma
697 + h->u.def.section->output_offset);
699 h = bfd_link_hash_lookup (info->hash, BFD_M68HC11_BANK_SIZE_NAME,
701 if (h != (struct bfd_link_hash_entry*) NULL
702 && h->type == bfd_link_hash_defined)
703 pinfo->bank_size = (h->u.def.value
704 + h->u.def.section->output_section->vma
705 + h->u.def.section->output_offset);
707 pinfo->bank_shift = 0;
708 for (i = pinfo->bank_size; i != 0; i >>= 1)
711 pinfo->bank_mask = (1 << pinfo->bank_shift) - 1;
712 pinfo->bank_physical_end = pinfo->bank_physical + pinfo->bank_size;
713 pinfo->bank_param_initialized = 1;
715 h = bfd_link_hash_lookup (info->hash, "__far_trampoline", FALSE,
717 if (h != (struct bfd_link_hash_entry*) NULL
718 && h->type == bfd_link_hash_defined)
719 pinfo->trampoline_addr = (h->u.def.value
720 + h->u.def.section->output_section->vma
721 + h->u.def.section->output_offset);
724 /* Return 1 if the address is in banked memory.
725 This can be applied to a virtual address and to a physical address. */
727 m68hc11_addr_is_banked (struct m68hc11_page_info *pinfo, bfd_vma addr)
729 if (addr >= pinfo->bank_virtual)
732 if (addr >= pinfo->bank_physical && addr <= pinfo->bank_physical_end)
738 /* Return the physical address seen by the processor, taking
739 into account banked memory. */
741 m68hc11_phys_addr (struct m68hc11_page_info *pinfo, bfd_vma addr)
743 if (addr < pinfo->bank_virtual)
746 /* Map the address to the memory bank. */
747 addr -= pinfo->bank_virtual;
748 addr &= pinfo->bank_mask;
749 addr += pinfo->bank_physical;
753 /* Return the page number corresponding to an address in banked memory. */
755 m68hc11_phys_page (struct m68hc11_page_info *pinfo, bfd_vma addr)
757 if (addr < pinfo->bank_virtual)
760 /* Map the address to the memory bank. */
761 addr -= pinfo->bank_virtual;
762 addr >>= pinfo->bank_shift;
767 /* This function is used for relocs which are only used for relaxing,
768 which the linker should otherwise ignore. */
770 bfd_reloc_status_type
771 m68hc11_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
772 arelent *reloc_entry,
773 asymbol *symbol ATTRIBUTE_UNUSED,
774 void *data ATTRIBUTE_UNUSED,
775 asection *input_section,
777 char **error_message ATTRIBUTE_UNUSED)
779 if (output_bfd != NULL)
780 reloc_entry->address += input_section->output_offset;
784 bfd_reloc_status_type
785 m68hc11_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
786 arelent *reloc_entry,
788 void *data ATTRIBUTE_UNUSED,
789 asection *input_section,
791 char **error_message ATTRIBUTE_UNUSED)
795 if (output_bfd != (bfd *) NULL
796 && (symbol->flags & BSF_SECTION_SYM) == 0
797 && (! reloc_entry->howto->partial_inplace
798 || reloc_entry->addend == 0))
800 reloc_entry->address += input_section->output_offset;
804 if (output_bfd != NULL)
805 return bfd_reloc_continue;
807 sz = input_section->rawsize ? input_section->rawsize : input_section->size;
808 if (reloc_entry->address > sz)
809 return bfd_reloc_outofrange;
815 elf32_m68hc11_gc_mark_hook (asection *sec,
816 struct bfd_link_info *info ATTRIBUTE_UNUSED,
817 Elf_Internal_Rela *rel,
818 struct elf_link_hash_entry *h,
819 Elf_Internal_Sym *sym)
823 switch (ELF32_R_TYPE (rel->r_info))
826 switch (h->root.type)
828 case bfd_link_hash_defined:
829 case bfd_link_hash_defweak:
830 return h->root.u.def.section;
832 case bfd_link_hash_common:
833 return h->root.u.c.p->section;
841 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
847 elf32_m68hc11_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
848 struct bfd_link_info *info ATTRIBUTE_UNUSED,
849 asection *sec ATTRIBUTE_UNUSED,
850 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
852 /* We don't use got and plt entries for 68hc11/68hc12. */
856 /* Look through the relocs for a section during the first phase.
857 Since we don't do .gots or .plts, we just need to consider the
858 virtual table relocs for gc. */
861 elf32_m68hc11_check_relocs (bfd *abfd, struct bfd_link_info *info,
862 asection *sec, const Elf_Internal_Rela *relocs)
864 Elf_Internal_Shdr * symtab_hdr;
865 struct elf_link_hash_entry ** sym_hashes;
866 struct elf_link_hash_entry ** sym_hashes_end;
867 const Elf_Internal_Rela * rel;
868 const Elf_Internal_Rela * rel_end;
870 if (info->relocatable)
873 symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
874 sym_hashes = elf_sym_hashes (abfd);
875 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
876 if (!elf_bad_symtab (abfd))
877 sym_hashes_end -= symtab_hdr->sh_info;
879 rel_end = relocs + sec->reloc_count;
881 for (rel = relocs; rel < rel_end; rel++)
883 struct elf_link_hash_entry * h;
884 unsigned long r_symndx;
886 r_symndx = ELF32_R_SYM (rel->r_info);
888 if (r_symndx < symtab_hdr->sh_info)
891 h = sym_hashes [r_symndx - symtab_hdr->sh_info];
893 switch (ELF32_R_TYPE (rel->r_info))
895 /* This relocation describes the C++ object vtable hierarchy.
896 Reconstruct it for later use during GC. */
897 case R_M68HC11_GNU_VTINHERIT:
898 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
902 /* This relocation describes which C++ vtable entries are actually
903 used. Record for later use during GC. */
904 case R_M68HC11_GNU_VTENTRY:
905 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
915 m68hc11_get_relocation_value (bfd *input_bfd, struct bfd_link_info *info,
916 asection *input_section,
917 asection **local_sections,
918 Elf_Internal_Sym *local_syms,
919 Elf_Internal_Rela *rel,
921 bfd_vma *relocation, bfd_boolean *is_far)
923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
925 unsigned long r_symndx;
927 struct elf_link_hash_entry *h;
928 Elf_Internal_Sym *sym;
929 const char* stub_name = 0;
931 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
932 sym_hashes = elf_sym_hashes (input_bfd);
934 r_symndx = ELF32_R_SYM (rel->r_info);
936 /* This is a final link. */
940 if (r_symndx < symtab_hdr->sh_info)
942 sym = local_syms + r_symndx;
943 sec = local_sections[r_symndx];
944 *relocation = (sec->output_section->vma
947 *is_far = (sym && (sym->st_other & STO_M68HC12_FAR));
949 stub_name = (bfd_elf_string_from_elf_section
950 (input_bfd, symtab_hdr->sh_link,
955 bfd_boolean unresolved_reloc, warned;
957 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
958 r_symndx, symtab_hdr, sym_hashes,
959 h, sec, *relocation, unresolved_reloc, warned);
961 *is_far = (h && (h->other & STO_M68HC12_FAR));
962 stub_name = h->root.root.string;
966 *name = h->root.root.string;
969 *name = (bfd_elf_string_from_elf_section
970 (input_bfd, symtab_hdr->sh_link, sym->st_name));
971 if (*name == NULL || **name == '\0')
972 *name = bfd_section_name (input_bfd, sec);
975 if (*is_far && ELF32_R_TYPE (rel->r_info) == R_M68HC11_16)
977 struct elf32_m68hc11_stub_hash_entry* stub;
978 struct m68hc11_elf_link_hash_table *htab;
980 htab = m68hc11_elf_hash_table (info);
981 stub = m68hc12_stub_hash_lookup (htab->stub_hash_table,
982 *name, FALSE, FALSE);
985 *relocation = stub->stub_offset
986 + stub->stub_sec->output_section->vma
987 + stub->stub_sec->output_offset;
994 /* Relocate a 68hc11/68hc12 ELF section. */
996 elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
997 struct bfd_link_info *info,
998 bfd *input_bfd, asection *input_section,
999 bfd_byte *contents, Elf_Internal_Rela *relocs,
1000 Elf_Internal_Sym *local_syms,
1001 asection **local_sections)
1003 Elf_Internal_Shdr *symtab_hdr;
1004 struct elf_link_hash_entry **sym_hashes;
1005 Elf_Internal_Rela *rel, *relend;
1007 struct m68hc11_page_info *pinfo;
1008 const struct elf_backend_data * const ebd = get_elf_backend_data (input_bfd);
1010 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1011 sym_hashes = elf_sym_hashes (input_bfd);
1013 /* Get memory bank parameters. */
1014 m68hc11_elf_get_bank_parameters (info);
1015 pinfo = &m68hc11_elf_hash_table (info)->pinfo;
1018 relend = relocs + input_section->reloc_count;
1019 for (; rel < relend; rel++)
1023 reloc_howto_type *howto;
1024 unsigned long r_symndx;
1025 Elf_Internal_Sym *sym;
1028 bfd_reloc_status_type r = bfd_reloc_undefined;
1035 r_symndx = ELF32_R_SYM (rel->r_info);
1036 r_type = ELF32_R_TYPE (rel->r_info);
1038 if (r_type == R_M68HC11_GNU_VTENTRY
1039 || r_type == R_M68HC11_GNU_VTINHERIT )
1042 if (info->relocatable)
1044 /* This is a relocatable link. We don't have to change
1045 anything, unless the reloc is against a section symbol,
1046 in which case we have to adjust according to where the
1047 section symbol winds up in the output section. */
1048 if (r_symndx < symtab_hdr->sh_info)
1050 sym = local_syms + r_symndx;
1051 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1053 sec = local_sections[r_symndx];
1054 rel->r_addend += sec->output_offset + sym->st_value;
1060 (*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel);
1063 m68hc11_get_relocation_value (input_bfd, info, input_section,
1064 local_sections, local_syms,
1065 rel, &name, &relocation, &is_far);
1067 /* Do the memory bank mapping. */
1068 phys_addr = m68hc11_phys_addr (pinfo, relocation + rel->r_addend);
1069 phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend);
1073 /* Reloc used by 68HC12 call instruction. */
1074 bfd_put_16 (input_bfd, phys_addr,
1075 (bfd_byte*) contents + rel->r_offset);
1076 bfd_put_8 (input_bfd, phys_page,
1077 (bfd_byte*) contents + rel->r_offset + 2);
1079 r_type = R_M68HC11_NONE;
1082 case R_M68HC11_NONE:
1086 case R_M68HC11_LO16:
1087 /* Reloc generated by %addr(expr) gas to obtain the
1088 address as mapped in the memory bank window. */
1089 relocation = phys_addr;
1092 case R_M68HC11_PAGE:
1093 /* Reloc generated by %page(expr) gas to obtain the
1094 page number associated with the address. */
1095 relocation = phys_page;
1099 /* Get virtual address of instruction having the relocation. */
1104 msg = _("Reference to the far symbol `%s' using a wrong "
1105 "relocation may result in incorrect execution");
1106 buf = alloca (strlen (msg) + strlen (name) + 10);
1107 sprintf (buf, msg, name);
1109 (* info->callbacks->warning)
1110 (info, buf, name, input_bfd, NULL, rel->r_offset);
1113 /* Get virtual address of instruction having the relocation. */
1114 insn_addr = input_section->output_section->vma
1115 + input_section->output_offset
1118 insn_page = m68hc11_phys_page (pinfo, insn_addr);
1120 if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)
1121 && m68hc11_addr_is_banked (pinfo, insn_addr)
1122 && phys_page != insn_page)
1127 msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank "
1128 "as current banked address [%lx:%04lx] (%lx)");
1130 buf = alloca (strlen (msg) + 128);
1131 sprintf (buf, msg, phys_page, phys_addr,
1132 (long) (relocation + rel->r_addend),
1133 insn_page, m68hc11_phys_addr (pinfo, insn_addr),
1134 (long) (insn_addr));
1135 if (!((*info->callbacks->warning)
1136 (info, buf, name, input_bfd, input_section,
1141 if (phys_page != 0 && insn_page == 0)
1146 msg = _("reference to a banked address [%lx:%04lx] in the "
1147 "normal address space at %04lx");
1149 buf = alloca (strlen (msg) + 128);
1150 sprintf (buf, msg, phys_page, phys_addr, insn_addr);
1151 if (!((*info->callbacks->warning)
1152 (info, buf, name, input_bfd, input_section,
1156 relocation = phys_addr;
1160 /* If this is a banked address use the phys_addr so that
1161 we stay in the banked window. */
1162 if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend))
1163 relocation = phys_addr;
1166 if (r_type != R_M68HC11_NONE)
1167 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1168 contents, rel->r_offset,
1169 relocation, rel->r_addend);
1171 if (r != bfd_reloc_ok)
1173 const char * msg = (const char *) 0;
1177 case bfd_reloc_overflow:
1178 if (!((*info->callbacks->reloc_overflow)
1179 (info, name, howto->name, (bfd_vma) 0,
1180 input_bfd, input_section, rel->r_offset)))
1184 case bfd_reloc_undefined:
1185 if (!((*info->callbacks->undefined_symbol)
1186 (info, name, input_bfd, input_section,
1187 rel->r_offset, TRUE)))
1191 case bfd_reloc_outofrange:
1192 msg = _ ("internal error: out of range error");
1195 case bfd_reloc_notsupported:
1196 msg = _ ("internal error: unsupported relocation error");
1199 case bfd_reloc_dangerous:
1200 msg = _ ("internal error: dangerous error");
1204 msg = _ ("internal error: unknown error");
1208 if (!((*info->callbacks->warning)
1209 (info, msg, name, input_bfd, input_section,
1222 /* Set and control ELF flags in ELF header. */
1225 _bfd_m68hc11_elf_set_private_flags (bfd *abfd, flagword flags)
1227 BFD_ASSERT (!elf_flags_init (abfd)
1228 || elf_elfheader (abfd)->e_flags == flags);
1230 elf_elfheader (abfd)->e_flags = flags;
1231 elf_flags_init (abfd) = TRUE;
1235 /* Merge backend specific data from an object file to the output
1236 object file when linking. */
1239 _bfd_m68hc11_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
1243 bfd_boolean ok = TRUE;
1245 /* Check if we have the same endianess */
1246 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
1249 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1250 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1253 new_flags = elf_elfheader (ibfd)->e_flags;
1254 elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
1255 old_flags = elf_elfheader (obfd)->e_flags;
1257 if (! elf_flags_init (obfd))
1259 elf_flags_init (obfd) = TRUE;
1260 elf_elfheader (obfd)->e_flags = new_flags;
1261 elf_elfheader (obfd)->e_ident[EI_CLASS]
1262 = elf_elfheader (ibfd)->e_ident[EI_CLASS];
1264 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1265 && bfd_get_arch_info (obfd)->the_default)
1267 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1268 bfd_get_mach (ibfd)))
1275 /* Check ABI compatibility. */
1276 if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
1278 (*_bfd_error_handler)
1279 (_("%s: linking files compiled for 16-bit integers (-mshort) "
1280 "and others for 32-bit integers"),
1281 bfd_archive_filename (ibfd));
1284 if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
1286 (*_bfd_error_handler)
1287 (_("%s: linking files compiled for 32-bit double (-fshort-double) "
1288 "and others for 64-bit double"),
1289 bfd_archive_filename (ibfd));
1293 /* Processor compatibility. */
1294 if (!EF_M68HC11_CAN_MERGE_MACH (new_flags, old_flags))
1296 (*_bfd_error_handler)
1297 (_("%s: linking files compiled for HCS12 with "
1298 "others compiled for HC12"),
1299 bfd_archive_filename (ibfd));
1302 new_flags = ((new_flags & ~EF_M68HC11_MACH_MASK)
1303 | (EF_M68HC11_MERGE_MACH (new_flags, old_flags)));
1305 elf_elfheader (obfd)->e_flags = new_flags;
1307 new_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK);
1308 old_flags &= ~(EF_M68HC11_ABI | EF_M68HC11_MACH_MASK);
1310 /* Warn about any other mismatches */
1311 if (new_flags != old_flags)
1313 (*_bfd_error_handler)
1314 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
1315 bfd_archive_filename (ibfd), (unsigned long) new_flags,
1316 (unsigned long) old_flags);
1322 bfd_set_error (bfd_error_bad_value);
1330 _bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr)
1332 FILE *file = (FILE *) ptr;
1334 BFD_ASSERT (abfd != NULL && ptr != NULL);
1336 /* Print normal ELF private data. */
1337 _bfd_elf_print_private_bfd_data (abfd, ptr);
1339 /* xgettext:c-format */
1340 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
1342 if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32)
1343 fprintf (file, _("[abi=32-bit int, "));
1345 fprintf (file, _("[abi=16-bit int, "));
1347 if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
1348 fprintf (file, _("64-bit double, "));
1350 fprintf (file, _("32-bit double, "));
1352 if (strcmp (bfd_get_target (abfd), "elf32-m68hc11") == 0)
1353 fprintf (file, _("cpu=HC11]"));
1354 else if (elf_elfheader (abfd)->e_flags & EF_M68HCS12_MACH)
1355 fprintf (file, _("cpu=HCS12]"));
1357 fprintf (file, _("cpu=HC12]"));
1359 if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS)
1360 fprintf (file, _(" [memory=bank-model]"));
1362 fprintf (file, _(" [memory=flat]"));
1369 static void scan_sections_for_abi (bfd *abfd ATTRIBUTE_UNUSED,
1370 asection *asect, void *arg)
1372 struct m68hc11_scan_param* p = (struct m68hc11_scan_param*) arg;
1374 if (asect->vma >= p->pinfo->bank_virtual)
1375 p->use_memory_banks = TRUE;
1378 /* Tweak the OSABI field of the elf header. */
1381 elf32_m68hc11_post_process_headers (bfd *abfd, struct bfd_link_info *link_info)
1383 struct m68hc11_scan_param param;
1388 m68hc11_elf_get_bank_parameters (link_info);
1390 param.use_memory_banks = FALSE;
1391 param.pinfo = &m68hc11_elf_hash_table (link_info)->pinfo;
1392 bfd_map_over_sections (abfd, scan_sections_for_abi, ¶m);
1393 if (param.use_memory_banks)
1395 Elf_Internal_Ehdr * i_ehdrp;
1397 i_ehdrp = elf_elfheader (abfd);
1398 i_ehdrp->e_flags |= E_M68HC12_BANKS;