Initial revision

1 files changed, 445 insertions, 0 deletions

diff --git a/bfd/coff-w65.c b/bfd/coff-w65.c
new file mode 100644
index 0000000000..28d68c3799
--- /dev/null
+++ b/bfd/coff-w65.c
@@ -0,0 +1,445 @@
+/* BFD back-end for WDC 65816 COFF binaries.
+   Copyright 1995, 96, 1997 Free Software Foundation, Inc.
+   Written by Steve Chamberlain, <sac@cygnus.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "bfdlink.h"
+#include "coff/w65.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
+static reloc_howto_type howto_table[] =
+{
+  HOWTO (R_W65_ABS8,    0,  0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false),
+  HOWTO (R_W65_ABS16,   1,  0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false),
+  HOWTO (R_W65_ABS24,   0,  2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false),
+  HOWTO (R_W65_ABS8S8,  0,  0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false),
+  HOWTO (R_W65_ABS8S16, 0,  0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false),
+  HOWTO (R_W65_ABS16S8, 1,  0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false),
+  HOWTO (R_W65_ABS16S16,1,  0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false),
+  HOWTO (R_W65_PCR8,    0,  0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true),
+  HOWTO (R_W65_PCR16,   1,  0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true),
+  HOWTO (R_W65_DP,    0,  0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false),
+
+};
+
+
+/* Turn a howto into a reloc number */
+
+#define SELECT_RELOC(x,howto) \
+  { x.r_type = select_reloc(howto); }
+
+#define BADMAG(x) (W65BADMAG(x))
+#define W65 1			/* Customize coffcode.h */
+#define __A_MAGIC_SET__
+
+
+/* Code to swap in the reloc */
+#define SWAP_IN_RELOC_OFFSET   bfd_h_get_32
+#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
+#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
+  dst->r_stuff[0] = 'S'; \
+  dst->r_stuff[1] = 'C';
+
+
+static int
+select_reloc (howto)
+     reloc_howto_type *howto;
+{
+  return howto->type ;
+}
+
+/* Code to turn a r_type into a howto ptr, uses the above howto table
+   */
+
+static void
+rtype2howto (internal, dst)
+     arelent *internal;
+     struct internal_reloc *dst;
+{
+      internal->howto = howto_table + dst->r_type - 1;
+}
+
+#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
+
+
+/* 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 (relent, reloc, symbols, abfd, section)
+     arelent * relent;
+     struct internal_reloc *reloc;
+     asymbol ** symbols;
+     bfd * abfd;
+     asection * section;
+{
+  relent->address = reloc->r_vaddr;
+  rtype2howto (relent, reloc);
+
+  if (((int) reloc->r_symndx) > 0)
+    {
+      relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
+    }
+  else
+    {
+      relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol);
+    }
+
+
+
+  relent->addend = reloc->r_offset;
+
+  relent->address -= section->vma;
+  /*  relent->section = 0;*/
+}
+
+
+static int
+h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
+     bfd *abfd;
+     asection *input_section;
+     arelent *reloc;
+     unsigned int shrink;
+     struct bfd_link_info *link_info;
+{
+  bfd_vma value;  
+  bfd_vma dot;
+  bfd_vma gap;
+
+  /* The address of the thing to be relocated will have moved back by 
+   the size of the shrink  - but we don't change reloc->address here,
+   since we need it to know where the relocation lives in the source
+   uncooked section */
+
+  /*  reloc->address -= shrink;   conceptual */
+
+  bfd_vma address = reloc->address - shrink;
+  
+
+  switch (reloc->howto->type)
+    {     
+    case R_MOV16B2:
+    case R_JMP2:
+      shrink+=2;
+      break;
+
+      /* Thing is a move one byte */
+    case R_MOV16B1:
+      value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+
+      if (value >= 0xff00)
+	{ 
+
+	  /* Change the reloc type from 16bit, possible 8 to 8bit
+	     possible 16 */
+	  reloc->howto = reloc->howto + 1;	  
+	  /* The place to relc moves back by one */
+	  /* This will be two bytes smaller in the long run */
+	  shrink +=2 ;
+	  bfd_perform_slip(abfd, 2, input_section, address);
+	}      
+
+      break;
+      /* This is the 24 bit branch which could become an 8 bitter, 
+       the relocation points to the first byte of the insn, not the
+       actual data */
+
+    case R_JMPL1:
+      value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+	
+      dot = input_section->output_section->vma +
+	input_section->output_offset + address;
+  
+      /* See if the address we're looking at within 127 bytes of where
+	 we are, if so then we can use a small branch rather than the
+	 jump we were going to */
+
+      gap = value - dot ;
+  
+      if (-120 < (long)gap && (long)gap < 120 )
+	{ 
+
+	  /* Change the reloc type from 24bit, possible 8 to 8bit
+	     possible 32 */
+	  reloc->howto = reloc->howto + 1;	  
+	  /* This will be two bytes smaller in the long run */
+	  shrink +=2 ;
+	  bfd_perform_slip(abfd, 2, input_section, address);
+	}
+      break;
+
+    case R_JMP1:
+
+      value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+	
+      dot = input_section->output_section->vma +
+	input_section->output_offset + address;
+  
+      /* See if the address we're looking at within 127 bytes of where
+	 we are, if so then we can use a small branch rather than the
+	 jump we were going to */
+
+      gap = value - (dot - shrink);
+  
+
+      if (-120 < (long)gap && (long)gap < 120 )
+	{ 
+
+	  /* Change the reloc type from 16bit, possible 8 to 8bit
+	     possible 16 */
+	  reloc->howto = reloc->howto + 1;	  
+	  /* The place to relc moves back by one */
+
+	  /* This will be two bytes smaller in the long run */
+	  shrink +=2 ;
+	  bfd_perform_slip(abfd, 2, input_section, address);
+	}
+      break;
+    }
+
+  
+  return shrink;
+}
+
+
+/* First phase of a relaxing link */
+
+/* Reloc types
+   large		small
+   R_MOV16B1		R_MOV16B2	mov.b with 16bit or 8 bit address
+   R_JMP1		R_JMP2		jmp or pcrel branch
+   R_JMPL1		R_JMPL_B8	24jmp or pcrel branch
+   R_MOV24B1		R_MOV24B2	24 or 8 bit reloc for mov.b
+
+*/
+
+static void
+h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
+			   dst_ptr)
+     bfd *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;
+{
+  unsigned int src_address = *src_ptr;
+  unsigned int dst_address = *dst_ptr;
+  asection *input_section = link_order->u.indirect.section;
+
+  switch (reloc->howto->type)
+    {
+    case R_W65_ABS8:
+    case R_W65_DP:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	bfd_put_8 (abfd, gap, data + dst_address);
+	dst_address += 1;
+	src_address += 1;
+      }
+      break;
+
+    case R_W65_ABS8S8:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	gap >>= 8;
+	bfd_put_8 (abfd, gap, data + dst_address);
+	dst_address += 1;
+	src_address += 1;
+      }
+      break;
+
+    case R_W65_ABS8S16:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	gap >>=16;
+	bfd_put_8 (abfd, gap, data + dst_address);
+	dst_address += 1;
+	src_address += 1;
+      }
+      break;
+
+    case R_W65_ABS16:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+
+	bfd_put_16 (abfd, gap, data + dst_address);
+	dst_address += 2;
+	src_address += 2;
+      }
+      break;
+    case R_W65_ABS16S8:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	gap >>= 8;
+	bfd_put_16 (abfd, gap, data + dst_address);
+	dst_address += 2;
+	src_address += 2;
+      }
+      break;
+    case R_W65_ABS16S16:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	gap >>= 16;
+	bfd_put_16 (abfd, gap, data + dst_address);
+	dst_address += 2;
+	src_address += 2;
+      }
+      break;
+
+    case R_W65_ABS24:
+      {
+	unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						       input_section);
+	bfd_put_16 (abfd, gap, data + dst_address);
+	bfd_put_8 (abfd, gap>>16, data+dst_address+2);
+	dst_address += 3;
+	src_address += 3;
+      }
+      break;
+
+    case R_W65_PCR8:
+      {
+	int gap = bfd_coff_reloc16_get_value (reloc, link_info,
+					      input_section);
+	bfd_vma dot = link_order->offset 
+	  + dst_address 
+	    + link_order->u.indirect.section->output_section->vma;
+
+	gap -= dot + 1;
+	if (gap < -128 || gap > 127) {
+	  if (! ((*link_info->callbacks->reloc_overflow)
+		 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
+		  reloc->howto->name, reloc->addend, input_section->owner,
+		  input_section, reloc->address)))
+	    abort();
+	}
+	bfd_put_8 (abfd, gap, data + dst_address);
+	dst_address += 1;
+	src_address += 1;
+      }
+      break;
+
+    case R_W65_PCR16:
+      {
+	bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info,
+						  input_section);
+	bfd_vma dot = link_order->offset 
+	  + dst_address 
+	    + link_order->u.indirect.section->output_section->vma;
+
+
+	/* This wraps within the page, so ignore the relativeness, look at the
+	   high part */
+	if ((gap & 0xf0000) != (dot & 0xf0000)) {
+	  if (! ((*link_info->callbacks->reloc_overflow)
+		 (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
+		  reloc->howto->name, reloc->addend, input_section->owner,
+		  input_section, reloc->address)))
+	    abort();
+	}
+
+	gap -= dot + 2;
+	bfd_put_16 (abfd, gap, data + dst_address);
+	dst_address += 2;
+	src_address += 2;
+      }
+      break;
+    default:
+      printf(_("ignoring reloc %s\n"), reloc->howto->name);
+      break;
+
+    }
+  *src_ptr = src_address;
+  *dst_ptr = dst_address;
+
+}
+
+#define coff_reloc16_extra_cases h8300_reloc16_extra_cases
+#define coff_reloc16_estimate h8300_reloc16_estimate
+
+#include "coffcode.h"
+
+
+#undef coff_bfd_get_relocated_section_contents
+#undef coff_bfd_relax_section
+#define coff_bfd_get_relocated_section_contents \
+  bfd_coff_reloc16_get_relocated_section_contents
+#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
+
+
+
+bfd_target w65_vec =
+{
+  "coff-w65",			/* name */
+  bfd_target_coff_flavour,
+  BFD_ENDIAN_LITTLE,		/* data byte order is little */
+  BFD_ENDIAN_LITTLE,		/* header byte order is little */
+
+  (HAS_RELOC | EXEC_P |		/* object flags */
+   HAS_LINENO | HAS_DEBUG |
+   HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
+  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),	/* section flags */
+  '_',				/* leading char */
+  '/',				/* ar_pad_char */
+  15,				/* ar_max_namelen */
+  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+  bfd_getl16, bfd_getl_signed_16, bfd_putl16,	/* data */
+  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+  bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+  bfd_getl16, bfd_getl_signed_16, bfd_putl16,	/* hdrs */
+
+  {_bfd_dummy_target, coff_object_p,	/* bfd_check_format */
+   bfd_generic_archive_p, _bfd_dummy_target},
+  {bfd_false, coff_mkobject, _bfd_generic_mkarchive,	/* bfd_set_format */
+   bfd_false},
+  {bfd_false, coff_write_object_contents,	/* bfd_write_contents */
+   _bfd_write_archive_contents, bfd_false},
+
+     BFD_JUMP_TABLE_GENERIC (coff),
+     BFD_JUMP_TABLE_COPY (coff),
+     BFD_JUMP_TABLE_CORE (_bfd_nocore),
+     BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
+     BFD_JUMP_TABLE_SYMBOLS (coff),
+     BFD_JUMP_TABLE_RELOCS (coff),
+     BFD_JUMP_TABLE_WRITE (coff),
+     BFD_JUMP_TABLE_LINK (coff),
+     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
+
+  COFF_SWAP_TABLE,
+};