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Diffstat (limited to 'bfd/elf32-m68hc12.c')
-rw-r--r--bfd/elf32-m68hc12.c281
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
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+/* 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"
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