/* BFD back-end for Motorola M68K COFF LynxOS files.
- Copyright 1993, 1994 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define TARGET_SYM m68klynx_coff_vec
#define TARGET_NAME "coff-m68k-lynx"
-
#define LYNXOS
-
#define COFF_LONG_FILENAMES
-
-#define _bfd_m68kcoff_howto_table _bfd_m68klynx_howto_table
-#define _bfd_m68kcoff_rtype2howto _bfd_m68klynx_rtype2howto
-#define _bfd_m68kcoff_howto2rtype _bfd_m68klynx_howto2rtype
-#define _bfd_m68kcoff_reloc_type_lookup _bfd_m68klynx_reloc_type_lookup
-
-#define LYNX_SPECIAL_FN _bfd_m68klynx_special_fn
-
-#include "bfd.h"
-#include "sysdep.h"
-
-#ifdef ANSI_PROTOTYPES
-struct internal_reloc;
-struct coff_link_hash_entry;
-struct internal_syment;
-#endif
-
-static bfd_reloc_status_type _bfd_m68klynx_special_fn
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static boolean lynx_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
-static const struct reloc_howto_struct *coff_m68k_lynx_rtype_to_howto
- PARAMS ((bfd *, asection *, struct internal_reloc *,
- struct coff_link_hash_entry *, struct internal_syment *,
- bfd_vma *));
-
-/* For some reason 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 relocateable 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
-_bfd_m68klynx_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;
- bfd *output_bfd;
- char **error_message;
-{
- 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
- relocateable 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, x, addr);
- }
- break;
-
- case 2:
- {
- long x = bfd_get_32 (abfd, addr);
- DOIT (x);
- bfd_put_32 (abfd, 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; \
- }
-
-#define coff_bfd_link_add_symbols lynx_link_add_symbols
-#define coff_rtype_to_howto coff_m68k_lynx_rtype_to_howto
+#define STATIC_RELOCS
+#define COFF_COMMON_ADDEND
#include "coff-m68k.c"
-
-/* On Lynx, we may have a COFF archive which contains a.out elements.
- This screws up the COFF linker, which expects that any archive it
- gets contains COFF elements. We override the add_symbols function
- to check for this case. */
-
-static boolean
-lynx_link_add_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- if (bfd_get_format (abfd) == bfd_archive)
- {
- bfd *first;
-
- first = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
- if (first == NULL)
- return false;
- if (! bfd_check_format (first, bfd_object))
- return false;
- if (bfd_get_flavour (first) != bfd_target_coff_flavour)
- {
- /* Treat the archive as though it were actually of the
- flavour of its first element. This ought to work,
- since the archive support is fairly generic. */
- return (*first->xvec->_bfd_link_add_symbols) (abfd, info);
- }
- }
-
- return _bfd_coff_link_add_symbols (abfd, info);
-}
-
-/* coff-m68k.c uses the special COFF backend linker. We need to
- adjust common symbols.
-
- We can't define this function until after we have included
- coff-m68k.c, because it uses RTYPE2HOWTO. */
-
-/*ARGSUSED*/
-static const struct reloc_howto_struct *
-coff_m68k_lynx_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
- bfd *abfd;
- asection *sec;
- struct internal_reloc *rel;
- struct coff_link_hash_entry *h;
- struct internal_syment *sym;
- bfd_vma *addendp;
-{
- arelent relent;
- const struct reloc_howto_struct *howto;
-
- RTYPE2HOWTO (&relent, rel);
-
- howto = relent.howto;
-
- 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
- relocateable 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;
-}
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