Applied Stephane Carrez <Stephane.Carrez@worldnet.fr> patches to add support

for m68hc11 and m68hc12 processors.

1 files changed, 281 insertions, 0 deletions

diff --git a/bfd/elf32-m68hc12.c b/bfd/elf32-m68hc12.c
new file mode 100644
index 00000000000..b4db9bc58e1
--- /dev/null
+++ b/bfd/elf32-m68hc12.c
@@ -0,0 +1,281 @@
+/* Motorola 68HC12-specific support for 32-bit ELF
+   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   Contributed by Stephane Carrez (stcarrez@worldnet.fr)
+   (Heavily copied from the D10V port by Martin Hunt (hunt@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 "elf-bfd.h"
+#include "elf/m68hc11.h"
+
+static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
+PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
+static void m68hc11_info_to_howto_rel
+PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
+
+
+/* Use REL instead of RELA to save space */
+#define USE_REL
+
+/* The Motorola 68HC11 microcontroler only addresses 64Kb.
+   We must handle 8 and 16-bit relocations.  The 32-bit relocation
+   is defined but not used except by gas when -gstabs is used (which
+   is wrong).
+   The 3-bit and 16-bit PC rel relocation is only used by 68HC12.  */
+static reloc_howto_type elf_m68hc11_howto_table[] = {
+  /* This reloc does nothing.  */
+  HOWTO (R_M68HC11_NONE,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_NONE",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 8 bit absolute relocation */
+  HOWTO (R_M68HC11_8,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_8",		/* name */
+	 false,			/* partial_inplace */
+	 0x00ff,		/* src_mask */
+	 0x00ff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 8 bit absolute relocation (upper address) */
+  HOWTO (R_M68HC11_HI8,		/* type */
+	 8,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_HI8",	/* name */
+	 false,			/* partial_inplace */
+	 0x00ff,		/* src_mask */
+	 0x00ff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 8 bit absolute relocation (upper address) */
+  HOWTO (R_M68HC11_LO8,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_LO8",	/* name */
+	 false,			/* partial_inplace */
+	 0x00ff,		/* src_mask */
+	 0x00ff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 8 bit PC-rel relocation */
+  HOWTO (R_M68HC11_PCREL_8,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_PCREL_8",	/* name */
+	 false,			/* partial_inplace */
+	 0x0,			/* src_mask */
+	 0x00ff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 16 bit absolute relocation */
+  HOWTO (R_M68HC11_16,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont /*bitfield */ ,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_16",	/* name */
+	 false,			/* partial_inplace */
+	 0xffff,		/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 32 bit absolute relocation.  This one is never used for the
+     code relocation.  It's used by gas for -gstabs generation.  */
+  HOWTO (R_M68HC11_32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_32",	/* name */
+	 false,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 3 bit absolute relocation */
+  HOWTO (R_M68HC11_3B,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 3,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_4B",	/* name */
+	 false,			/* partial_inplace */
+	 0x003,			/* src_mask */
+	 0x003,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 16 bit PC-rel relocation */
+  HOWTO (R_M68HC11_PCREL_16,	/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_M68HC11_PCREL_16",	/* name */
+	 false,			/* partial_inplace */
+	 0x0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* GNU extension to record C++ vtable hierarchy */
+  HOWTO (R_M68HC11_GNU_VTINHERIT,	/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont,	/* complain_on_overflow */
+	 NULL,			/* special_function */
+	 "R_M68HC11_GNU_VTINHERIT",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* GNU extension to record C++ vtable member usage */
+  HOWTO (R_M68HC11_GNU_VTENTRY,	/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont,	/* complain_on_overflow */
+	 _bfd_elf_rel_vtable_reloc_fn,	/* special_function */
+	 "R_M68HC11_GNU_VTENTRY",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+};
+
+/* Map BFD reloc types to M68HC11 ELF reloc types.  */
+
+struct m68hc11_reloc_map
+{
+  bfd_reloc_code_real_type bfd_reloc_val;
+  unsigned char elf_reloc_val;
+};
+
+static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
+  {BFD_RELOC_NONE, R_M68HC11_NONE,},
+  {BFD_RELOC_8, R_M68HC11_8},
+  {BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
+  {BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
+  {BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
+  {BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
+  {BFD_RELOC_16, R_M68HC11_16},
+  {BFD_RELOC_32, R_M68HC11_32},
+  {BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
+
+  /* The following relocs are defined but they probably don't work yet.  */
+  {BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
+  {BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
+};
+
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_type_lookup (abfd, code)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     bfd_reloc_code_real_type code;
+{
+  unsigned int i;
+
+  for (i = 0;
+       i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
+       i++)
+    {
+      if (m68hc11_reloc_map[i].bfd_reloc_val == code)
+	return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
+    }
+
+  return NULL;
+}
+
+/* Set the howto pointer for an M68HC11 ELF reloc.  */
+
+static void
+m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     arelent *cache_ptr;
+     Elf32_Internal_Rel *dst;
+{
+  unsigned int r_type;
+
+  r_type = ELF32_R_TYPE (dst->r_info);
+  BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
+  cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
+}
+
+/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
+   The Motorola spec says to use a different Elf machine code.  */
+#define ELF_ARCH		bfd_arch_m68hc12
+#define ELF_MACHINE_CODE	EM_68HC12
+#define ELF_MAXPAGESIZE		0x1000
+
+#define TARGET_BIG_SYM          bfd_elf32_m68hc12_vec
+#define TARGET_BIG_NAME		"elf32-m68hc12"
+
+#define elf_info_to_howto	0
+#define elf_info_to_howto_rel	m68hc11_info_to_howto_rel
+#define elf_backend_object_p	0
+#define elf_backend_final_write_processing	0
+
+#include "elf32-target.h"