| /* Motorola 68HC12-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_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" |