Add support for the Z80 processor family

1 files changed, 244 insertions, 0 deletions

diff --git a/bfd/coff-z80.c b/bfd/coff-z80.c
new file mode 100644
index 0000000..fe401d7
--- /dev/null
+++ b/bfd/coff-z80.c
@@ -0,0 +1,244 @@
+/* BFD back-end for Zilog Z80 COFF binaries.
+   Copyright 2005 Free Software Foundation, Inc.
+   Contributed by Arnold Metselaar <arnold_m@operamail.com>
+
+   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., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "bfdlink.h"
+#include "coff/z80.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
+
+static reloc_howto_type r_imm32 =
+HOWTO (R_IMM32, 0, 1, 32, FALSE, 0,
+       complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff,
+       FALSE);
+
+static reloc_howto_type r_imm16 =
+HOWTO (R_IMM16, 0, 1, 16, FALSE, 0,
+       complain_overflow_dont, 0, "r_imm16", TRUE, 0x0000ffff, 0x0000ffff,
+       FALSE);
+
+static reloc_howto_type r_imm8 =
+HOWTO (R_IMM8, 0, 0, 8, FALSE, 0,
+       complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff,
+       FALSE);
+
+static reloc_howto_type r_jr =
+HOWTO (R_JR, 0, 0, 8, TRUE, 0, 
+       complain_overflow_signed, 0, "r_jr", FALSE, 0, 0xFF,
+       FALSE);
+
+static reloc_howto_type r_off8 =
+HOWTO (R_OFF8, 0, 0, 8, FALSE, 0, 
+       complain_overflow_signed, 0,"r_off8", FALSE, 0, 0xff,
+       FALSE);
+
+
+#define BADMAG(x) Z80BADMAG(x)
+#define Z80 1			/* Customize coffcode.h.  */
+#define __A_MAGIC_SET__
+
+/* Code to swap in the reloc.  */
+
+#define SWAP_IN_RELOC_OFFSET	H_GET_32
+#define SWAP_OUT_RELOC_OFFSET	H_PUT_32
+
+#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
+  dst->r_stuff[0] = 'S'; \
+  dst->r_stuff[1] = 'C';
+
+/* Code to turn a r_type into a howto ptr, uses the above howto table.  */
+
+static void
+rtype2howto (arelent *internal, struct internal_reloc *dst)
+{
+  switch (dst->r_type)
+    {
+    default:
+      abort ();
+      break;
+    case R_IMM8:
+      internal->howto = &r_imm8;
+      break;
+    case R_IMM16:
+      internal->howto = &r_imm16;
+      break;
+    case R_IMM32:
+      internal->howto = &r_imm32;
+      break;
+    case R_JR:
+      internal->howto = &r_jr;
+      break;
+    case R_OFF8:
+      internal->howto = &r_off8;
+      break;
+    }
+}
+
+#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
+
+static reloc_howto_type *
+coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+			    bfd_reloc_code_real_type code)
+{
+  switch (code)
+    {
+    case BFD_RELOC_8:		return & r_imm8;
+    case BFD_RELOC_16:		return & r_imm16;
+    case BFD_RELOC_32:		return & r_imm32;
+    case BFD_RELOC_8_PCREL:	return & r_jr;
+    case BFD_RELOC_Z80_DISP8:	return & r_off8;
+    default:			BFD_FAIL ();
+      return NULL;
+    }
+}
+
+/* Perform any necessary magic to the addend in a reloc entry.  */
+
+#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
+ cache_ptr->addend =  ext_reloc.r_offset;
+
+#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
+ reloc_processing(relent, reloc, symbols, abfd, section)
+
+static void
+reloc_processing (arelent *relent,
+                  struct internal_reloc *reloc,
+                  asymbol **symbols,
+                  bfd *abfd,
+                  asection *section)
+{
+  relent->address = reloc->r_vaddr;
+  rtype2howto (relent, reloc);
+
+  if (reloc->r_symndx > 0)
+    relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
+  else
+    relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+
+  relent->addend = reloc->r_offset;
+  relent->address -= section->vma;
+}
+
+static void
+extra_case (bfd *in_abfd,
+            struct bfd_link_info *link_info,
+            struct bfd_link_order *link_order,
+            arelent *reloc,
+            bfd_byte *data,
+            unsigned int *src_ptr,
+            unsigned int *dst_ptr)
+{
+  asection * input_section = link_order->u.indirect.section;
+  int val;
+
+  switch (reloc->howto->type)
+    {
+    case R_OFF8:
+	val = bfd_coff_reloc16_get_value (reloc, link_info,
+					   input_section);
+	if (val>127 || val<-128) /* Test for overflow.  */
+	  {
+	    if (! ((*link_info->callbacks->reloc_overflow)
+		   (link_info, NULL,
+		    bfd_asymbol_name (*reloc->sym_ptr_ptr),
+		    reloc->howto->name, reloc->addend, input_section->owner,
+		    input_section, reloc->address)))
+	      abort ();
+	  }
+	bfd_put_8 (in_abfd, val, data + *dst_ptr);
+	(*dst_ptr) += 1;
+	(*src_ptr) += 1;
+      break;
+
+    case R_IMM8:
+      val = bfd_get_16 ( in_abfd, data+*src_ptr)
+	+ bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+      bfd_put_8 (in_abfd, val, data + *dst_ptr);
+      (*dst_ptr) += 1;
+      (*src_ptr) += 1;
+      break;
+
+    case R_IMM16:
+      val = bfd_get_16 ( in_abfd, data+*src_ptr)
+	+ bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+      bfd_put_16 (in_abfd, val, data + *dst_ptr);
+      (*dst_ptr) += 2;
+      (*src_ptr) += 2;
+      break;
+
+    case R_IMM32:
+      val = bfd_get_32 ( in_abfd, data+*src_ptr)
+	+ bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+      bfd_put_32 (in_abfd, val, data + *dst_ptr);
+      (*dst_ptr) += 4;
+      (*src_ptr) += 4;
+      break;
+
+    case R_JR:
+      {
+	bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
+						  input_section);
+	bfd_vma dot = (link_order->offset
+		       + *dst_ptr
+		       + input_section->output_section->vma);
+	int gap = dst - dot - 1;  /* -1, Since the offset is relative
+				     to the value of PC after reading
+				     the offset.  */
+
+	if (gap >= 128 || gap < -128)
+	  {
+	    if (! ((*link_info->callbacks->reloc_overflow)
+		   (link_info, NULL,
+		    bfd_asymbol_name (*reloc->sym_ptr_ptr),
+		    reloc->howto->name, reloc->addend, input_section->owner,
+		    input_section, reloc->address)))
+	      abort ();
+	  }
+	bfd_put_8 (in_abfd, gap, data + *dst_ptr);
+	(*dst_ptr)++;
+	(*src_ptr)++;
+	break;
+      }
+
+    default:
+      abort ();
+    }
+}
+
+#define coff_reloc16_extra_cases    extra_case
+#define coff_bfd_reloc_type_lookup  coff_z80_reloc_type_lookup
+
+#include "coffcode.h"
+
+#undef  coff_bfd_get_relocated_section_contents
+#define coff_bfd_get_relocated_section_contents \
+  bfd_coff_reloc16_get_relocated_section_contents
+
+#undef  coff_bfd_relax_section
+#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
+
+CREATE_LITTLE_COFF_TARGET_VEC (z80coff_vec, "coff-z80", 0, 0, '\0', NULL, 
+			       COFF_SWAP_TABLE)
+