+#define coff_bfd_reloc_name_lookup m68k_reloc_name_lookup
+
+#ifndef COFF_COMMON_ADDEND
+#ifndef coff_rtype_to_howto
+
+#define coff_rtype_to_howto m68kcoff_rtype_to_howto
+
+static reloc_howto_type *m68kcoff_rtype_to_howto
+ PARAMS ((bfd *, asection *, struct internal_reloc *,
+ struct coff_link_hash_entry *, struct internal_syment *,
+ bfd_vma *));
+
+static reloc_howto_type *
+m68kcoff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ asection *sec;
+ struct internal_reloc *rel;
+ struct coff_link_hash_entry *h ATTRIBUTE_UNUSED;
+ struct internal_syment *sym ATTRIBUTE_UNUSED;
+ bfd_vma *addendp;
+{
+ arelent relent;
+ reloc_howto_type *howto;
+
+ relent.howto = NULL;
+ RTYPE2HOWTO (&relent, rel);
+
+ howto = relent.howto;
+
+ if (howto != NULL && howto->pc_relative)
+ *addendp += sec->vma;
+
+ return howto;
+}
+
+#endif /* ! defined (coff_rtype_to_howto) */
+#endif /* ! defined (COFF_COMMON_ADDEND) */
+\f
+#ifdef COFF_COMMON_ADDEND
+
+/* If COFF_COMMON_ADDEND is defined, then when using m68k COFF the
+ value stored in the .text section for a reference to a common
+ symbol is the value itself plus any desired offset. (taken from
+ work done by Ian Taylor, Cygnus Support, for I386 COFF). */
+
+/* If we are producing relocatable output, we need to do some
+ adjustments to the object file that are not done by the
+ bfd_perform_relocation function. This function is called by every
+ reloc type to make any required adjustments. */
+
+static bfd_reloc_status_type
+m68kcoff_common_addend_special_fn (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section ATTRIBUTE_UNUSED;
+ bfd *output_bfd;
+ char **error_message ATTRIBUTE_UNUSED;
+{
+ symvalue diff;
+
+ if (output_bfd == (bfd *) NULL)
+ return bfd_reloc_continue;
+
+ if (bfd_is_com_section (symbol->section))
+ {
+ /* We are relocating a common symbol. The current value in the
+ object file is ORIG + OFFSET, where ORIG is the value of the
+ common symbol as seen by the object file when it was compiled
+ (this may be zero if the symbol was undefined) and OFFSET is
+ the offset into the common symbol (normally zero, but may be
+ non-zero when referring to a field in a common structure).
+ ORIG is the negative of reloc_entry->addend, which is set by
+ the CALC_ADDEND macro below. We want to replace the value in
+ the object file with NEW + OFFSET, where NEW is the value of
+ the common symbol which we are going to put in the final
+ object file. NEW is symbol->value. */
+ diff = symbol->value + reloc_entry->addend;
+ }
+ else
+ {
+ /* For some reason bfd_perform_relocation always effectively
+ ignores the addend for a COFF target when producing
+ relocatable output. This seems to be always wrong for 386
+ COFF, so we handle the addend here instead. */
+ diff = reloc_entry->addend;
+ }
+
+#define DOIT(x) \
+ x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
+
+ if (diff != 0)
+ {
+ reloc_howto_type *howto = reloc_entry->howto;
+ unsigned char *addr = (unsigned char *) data + reloc_entry->address;
+
+ switch (howto->size)
+ {
+ case 0:
+ {
+ char x = bfd_get_8 (abfd, addr);
+ DOIT (x);
+ bfd_put_8 (abfd, x, addr);
+ }
+ break;
+
+ case 1:
+ {
+ short x = bfd_get_16 (abfd, addr);
+ DOIT (x);
+ bfd_put_16 (abfd, (bfd_vma) x, addr);
+ }
+ break;
+
+ case 2:
+ {
+ long x = bfd_get_32 (abfd, addr);
+ DOIT (x);
+ bfd_put_32 (abfd, (bfd_vma) x, addr);
+ }
+ break;
+
+ default:
+ abort ();
+ }
+ }
+
+ /* Now let bfd_perform_relocation finish everything up. */
+ return bfd_reloc_continue;
+}
+
+/* Compute the addend of a reloc. If the reloc is to a common symbol,
+ the object file contains the value of the common symbol. By the
+ time this is called, the linker may be using a different symbol
+ from a different object file with a different value. Therefore, we
+ hack wildly to locate the original symbol from this file so that we
+ can make the correct adjustment. This macro sets coffsym to the
+ symbol from the original file, and uses it to set the addend value
+ correctly. If this is not a common symbol, the usual addend
+ calculation is done, except that an additional tweak is needed for
+ PC relative relocs.
+ FIXME: This macro refers to symbols and asect; these are from the
+ calling function, not the macro arguments. */
+
+#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
+ { \
+ coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
+ if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
+ coffsym = (obj_symbols (abfd) \
+ + (cache_ptr->sym_ptr_ptr - symbols)); \
+ else if (ptr) \
+ coffsym = coff_symbol_from (abfd, ptr); \
+ if (coffsym != (coff_symbol_type *) NULL \
+ && coffsym->native->u.syment.n_scnum == 0) \
+ cache_ptr->addend = - coffsym->native->u.syment.n_value; \
+ else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
+ && ptr->section != (asection *) NULL) \
+ cache_ptr->addend = - (ptr->section->vma + ptr->value); \
+ else \
+ cache_ptr->addend = 0; \
+ if (ptr && (reloc.r_type == R_PCRBYTE \
+ || reloc.r_type == R_PCRWORD \
+ || reloc.r_type == R_PCRLONG)) \
+ cache_ptr->addend += asect->vma; \
+ }
+
+#ifndef coff_rtype_to_howto
+
+/* coff-m68k.c uses the special COFF backend linker. We need to
+ adjust common symbols. */
+
+static reloc_howto_type *
+m68kcoff_common_addend_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ asection *sec;
+ struct internal_reloc *rel;
+ struct coff_link_hash_entry *h;
+ struct internal_syment *sym;
+ bfd_vma *addendp;
+{
+ arelent relent;
+ reloc_howto_type *howto;
+
+ relent.howto = NULL;
+ RTYPE2HOWTO (&relent, rel);
+
+ howto = relent.howto;
+
+ if (howto->pc_relative)
+ *addendp += sec->vma;
+
+ if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
+ {
+ /* This is a common symbol. The section contents include the
+ size (sym->n_value) as an addend. The relocate_section
+ function will be adding in the final value of the symbol. We
+ need to subtract out the current size in order to get the
+ correct result. */
+ BFD_ASSERT (h != NULL);
+ *addendp -= sym->n_value;
+ }
+
+ /* If the output symbol is common (in which case this must be a
+ relocatable link), we need to add in the final size of the
+ common symbol. */
+ if (h != NULL && h->root.type == bfd_link_hash_common)
+ *addendp += h->root.u.c.size;
+
+ return howto;
+}
+
+#define coff_rtype_to_howto m68kcoff_common_addend_rtype_to_howto
+
+#endif /* ! defined (coff_rtype_to_howto) */
+
+#endif /* COFF_COMMON_ADDEND */
+
+#if !defined ONLY_DECLARE_RELOCS && ! defined STATIC_RELOCS
+/* Given a .data section and a .emreloc in-memory section, store
+ relocation information into the .emreloc section which can be
+ used at runtime to relocate the section. This is called by the
+ linker when the --embedded-relocs switch is used. This is called
+ after the add_symbols entry point has been called for all the
+ objects, and before the final_link entry point is called. */
+
+bfd_boolean
+bfd_m68k_coff_create_embedded_relocs (abfd, info, datasec, relsec, errmsg)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ asection *datasec;
+ asection *relsec;
+ char **errmsg;
+{
+ char *extsyms;
+ bfd_size_type symesz;
+ struct internal_reloc *irel, *irelend;
+ bfd_byte *p;
+ bfd_size_type amt;
+
+ BFD_ASSERT (! info->relocatable);
+
+ *errmsg = NULL;
+
+ if (datasec->reloc_count == 0)
+ return TRUE;
+
+ extsyms = obj_coff_external_syms (abfd);
+ symesz = bfd_coff_symesz (abfd);
+
+ irel = _bfd_coff_read_internal_relocs (abfd, datasec, TRUE, NULL, FALSE,
+ NULL);
+ irelend = irel + datasec->reloc_count;
+
+ amt = (bfd_size_type) datasec->reloc_count * 12;
+ relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
+ if (relsec->contents == NULL)
+ return FALSE;
+
+ p = relsec->contents;
+
+ for (; irel < irelend; irel++, p += 12)
+ {
+ asection *targetsec;
+
+ /* We are going to write a four byte longword into the runtime
+ reloc section. The longword will be the address in the data
+ section which must be relocated. It is followed by the name
+ of the target section NUL-padded or truncated to 8
+ characters. */
+
+ /* We can only relocate absolute longword relocs at run time. */
+ if (irel->r_type != R_RELLONG)
+ {
+ *errmsg = _("unsupported reloc type");
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ if (irel->r_symndx == -1)
+ targetsec = bfd_abs_section_ptr;
+ else
+ {
+ struct coff_link_hash_entry *h;
+
+ h = obj_coff_sym_hashes (abfd)[irel->r_symndx];
+ if (h == NULL)
+ {
+ struct internal_syment isym;
+
+ bfd_coff_swap_sym_in (abfd, extsyms + symesz * irel->r_symndx,
+ &isym);
+ targetsec = coff_section_from_bfd_index (abfd, isym.n_scnum);
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ targetsec = h->root.u.def.section;
+ else
+ targetsec = NULL;
+ }
+
+ bfd_put_32 (abfd,
+ (irel->r_vaddr - datasec->vma + datasec->output_offset), p);
+ memset (p + 4, 0, 8);
+ if (targetsec != NULL)
+ strncpy ((char *) p + 4, targetsec->output_section->name, 8);
+ }
+
+ return TRUE;
+}
+#endif /* neither ONLY_DECLARE_RELOCS not STATIC_RELOCS */
+\f
+#define coff_bfd_is_local_label_name m68k_coff_is_local_label_name
projects / deliverable / binutils-gdb.git / blobdiff