/* Motorola 68HC11-specific support for 32-bit ELF Copyright 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_m68hc11 #define ELF_MACHINE_CODE EM_68HC11 #define ELF_MAXPAGESIZE 0x1000 #define TARGET_BIG_SYM bfd_elf32_m68hc11_vec #define TARGET_BIG_NAME "elf32-m68hc11" #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"