1999-05-28 Martin Dorey <mdorey@madge.com>

	* elf32-i960.c: New file.
	* elf.c (prep_headers): Handle bfd_arch_i960.
	* targets.c (bfd_target_vector): Add &bfd_elf32_i960_vec.
	* config.bfd (i960-*-elf*): New target.
	* configure.in (bfd_elf32_i960_vec): New target vector.
	* Makefile.am (BFD32_BACKENDS): Add elf32-i960.lo.
	(BFD32_BACKENDS_CFILES): Add elf32-i960.c.
	* Makefile.in, aclocal.m4, configure: Rebuild.

1 files changed, 167 insertions, 0 deletions

diff --git a/bfd/elf32-i960.c b/bfd/elf32-i960.c
new file mode 100644
index 00000000000..7a3fd56d996
--- /dev/null
+++ b/bfd/elf32-i960.c
@@ -0,0 +1,167 @@
+/* Intel 860 specific support for 32-bit ELF
+   Copyright 1999 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/i960.h"
+
+static bfd_reloc_status_type elf32_i960_relocate
+  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static reloc_howto_type *elf32_i960_reloc_type_lookup
+  PARAMS ((bfd *, bfd_reloc_code_real_type));
+
+#define USE_REL 1
+
+#define bfd_elf32_bfd_reloc_type_lookup	elf32_i960_reloc_type_lookup
+#define elf_info_to_howto		elf32_i960_info_to_howto
+#define elf_info_to_howto_rel		elf32_i960_info_to_howto_rel
+
+static reloc_howto_type elf_howto_table[]=
+{
+  HOWTO(R_960_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield,
+	elf32_i960_relocate, "R_960_NONE", true,
+	0x00000000, 0x00000000, false),
+  { 1 },
+  HOWTO (R_960_32, 0, 2, 32, false, 0, complain_overflow_bitfield,
+	elf32_i960_relocate, "R_960_32", true,
+	0xffffffff, 0xffffffff, false),
+  HOWTO (R_960_IP24, 0, 2, 24, true, 0, complain_overflow_signed,
+	elf32_i960_relocate, "R_960_IP24 ", true,
+	0x00ffffff, 0x00ffffff, false),
+  { 4 },
+  { 5 },
+  { 6 },
+  { 7 }
+};
+
+static enum elf_i960_reloc_type
+elf32_i960_bfd_to_reloc_type (bfd_reloc_code_real_type code)
+{
+  switch (code)
+    {
+    default:
+      return R_960_NONE;
+    case BFD_RELOC_I960_CALLJ:
+      return R_960_OPTCALL;
+    case BFD_RELOC_32:
+    case BFD_RELOC_CTOR:
+      return R_960_32;
+    case BFD_RELOC_24_PCREL:
+      return R_960_IP24;
+    }
+}
+
+static void
+elf32_i960_info_to_howto (abfd, cache_ptr, dst)
+     bfd		*abfd;
+     arelent		*cache_ptr;
+     Elf32_Internal_Rela *dst;
+{
+  abort ();
+}
+
+static void
+elf32_i960_info_to_howto_rel (abfd, cache_ptr, dst)
+     bfd *abfd;
+     arelent *cache_ptr;
+     Elf32_Internal_Rel *dst;
+{
+  enum elf_i960_reloc_type type;
+
+  type = (enum elf_i960_reloc_type) ELF32_R_TYPE (dst->r_info);
+  BFD_ASSERT (type < R_960_max);
+
+  cache_ptr->howto = &elf_howto_table[(int) type];
+}
+
+/* ELF relocs are against symbols.  If we are producing relocateable
+   output, and the reloc is against an external symbol, and nothing
+   has given us any additional addend, the resulting reloc will also
+   be against the same symbol.  In such a case, we don't want to
+   change anything about the way the reloc is handled, since it will
+   all be done at final link time.  Rather than put special case code
+   into bfd_perform_relocation, all the reloc types use this howto
+   function.  It just short circuits the reloc if producing
+   relocateable output against an external symbol.  */
+
+/*ARGSUSED*/
+bfd_reloc_status_type
+elf32_i960_relocate (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;
+{
+  /* HACK: I think this first condition is necessary when producing
+     relocatable output.  After the end of HACK, the code is identical
+     to bfd_elf_generic_reloc().  I would _guess_ the first change
+     belongs there rather than here.  martindo 1998-10-23.  */
+  if (output_bfd != (bfd *) NULL
+      && reloc_entry->howto->pc_relative
+      && !reloc_entry->howto->pcrel_offset)
+    {
+      reloc_entry->addend -= symbol->value;
+    }
+  /* This is more dubious. */
+  else if (output_bfd != (bfd *) NULL
+	   && (symbol->flags & BSF_SECTION_SYM) != 0)
+    {
+      reloc_entry->addend -= symbol->section->output_section->vma;
+    }
+  else
+    {
+      /* end of HACK */
+      if (output_bfd != (bfd *) NULL
+	  && (symbol->flags & BSF_SECTION_SYM) == 0
+	  && (! reloc_entry->howto->partial_inplace
+	      || reloc_entry->addend == 0))
+	{
+	  reloc_entry->address += input_section->output_offset;
+	  return bfd_reloc_ok;
+	}
+    }
+
+  return bfd_reloc_continue;
+}
+
+static reloc_howto_type *
+elf32_i960_reloc_type_lookup (abfd, code)
+     bfd *abfd;
+     bfd_reloc_code_real_type code;
+{
+  return elf_howto_table + elf32_i960_bfd_to_reloc_type (code);
+}
+
+#define TARGET_LITTLE_SYM	bfd_elf32_i960_vec
+#define TARGET_LITTLE_NAME	"elf32-i960"
+#define ELF_ARCH		bfd_arch_i960
+#define ELF_MACHINE_CODE	EM_960
+
+#include "elf32-target.h"