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/* Motorola 68HC12-specific support for 32-bit ELF
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Copyright 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2010, 2012
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14 |
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Free Software Foundation, Inc.
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Contributed by Stephane Carrez (stcarrez@nerim.fr)
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(Heavily copied from the D10V port by Martin Hunt (hunt@cygnus.com))
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf32-m68hc1x.h"
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#include "elf/m68hc11.h"
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#include "opcode/m68hc11.h"
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/* Relocation functions. */
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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(bfd *, bfd_reloc_code_real_type);
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static void m68hc11_info_to_howto_rel
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(bfd *, arelent *, Elf_Internal_Rela *);
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/* Trampoline generation. */
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static bfd_boolean m68hc12_elf_size_one_stub
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(struct bfd_hash_entry *gen_entry, void *in_arg);
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static bfd_boolean m68hc12_elf_build_one_stub
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(struct bfd_hash_entry *gen_entry, void *in_arg);
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static struct bfd_link_hash_table* m68hc12_elf_bfd_link_hash_table_create
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(bfd*);
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static bfd_boolean m68hc12_elf_set_mach_from_flags PARAMS ((bfd *));
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/* Use REL instead of RELA to save space */
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#define USE_REL 1
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/* The 68HC12 microcontroler has a memory bank switching system
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with a 16Kb window in the 64Kb address space. The extended memory
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is mapped in the 16Kb window (at 0x8000). The page register controls
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which 16Kb bank is mapped. The call/rtc instructions take care of
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bank switching in function calls/returns.
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For GNU Binutils to work, we consider there is a physical memory
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at 0..0x0ffff and a kind of virtual memory above that. Symbols
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in virtual memory have their addresses treated in a special way
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when disassembling and when linking.
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For the linker to work properly, we must always relocate the virtual
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memory as if it is mapped at 0x8000. When a 16-bit relocation is
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made in the virtual memory, we check that it does not cross the
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memory bank where it is used. This would involve a page change
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which would be wrong. The 24-bit relocation is for that and it
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treats the address as a physical address + page number.
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Banked
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Address Space
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| | Page n
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+---------------+ 0x1010000
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| |
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| jsr _foo |
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| .. | Page 3
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| _foo: |
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+---------------+ 0x100C000
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| |
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| call _bar |
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| .. | Page 2
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| _bar: |
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+---------------+ 0x1008000
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/------>| |
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| | call _foo | Page 1
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| | |
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| +---------------+ 0x1004000
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Physical | | |
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Address Space | | | Page 0
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| | |
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+-----------+ 0x00FFFF | +---------------+ 0x1000000
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| call _foo | |
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+-----------+ 0x00BFFF -+---/
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| | 16K |
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+-----------+ 0x008000 -+
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= =
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+-----------+ 0000
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The 'call _foo' must be relocated with page 3 and 16-bit address
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mapped at 0x8000.
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The 3-bit and 16-bit PC rel relocation is only used by 68HC12. */
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static reloc_howto_type elf_m68hc11_howto_table[] = {
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/* This reloc does nothing. */
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HOWTO (R_M68HC11_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 8 bit absolute relocation */
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HOWTO (R_M68HC11_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_8", /* name */
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FALSE, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 8 bit absolute relocation (upper address) */
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HOWTO (R_M68HC11_HI8, /* type */
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8, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_HI8", /* name */
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FALSE, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 8 bit absolute relocation (upper address) */
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HOWTO (R_M68HC11_LO8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_LO8", /* name */
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FALSE, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 8 bit PC-rel relocation */
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HOWTO (R_M68HC11_PCREL_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_PCREL_8", /* name */
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FALSE, /* partial_inplace */
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0x00ff, /* src_mask */
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0x00ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 16 bit absolute relocation */
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HOWTO (R_M68HC11_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont /*bitfield */ , /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 32 bit absolute relocation. This one is never used for the
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code relocation. It's used by gas for -gstabs generation. */
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HOWTO (R_M68HC11_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 3 bit absolute relocation */
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HOWTO (R_M68HC11_3B, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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3, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_4B", /* name */
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FALSE, /* partial_inplace */
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0x003, /* src_mask */
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0x003, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 16 bit PC-rel relocation */
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HOWTO (R_M68HC11_PCREL_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC12_PCREL_16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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| 251 |
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_M68HC11_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_M68HC11_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage */
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HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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| 270 |
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0, /* bitsize */
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| 271 |
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FALSE, /* pc_relative */
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| 272 |
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0, /* bitpos */
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| 273 |
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complain_overflow_dont, /* complain_on_overflow */
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| 274 |
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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| 275 |
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"R_M68HC11_GNU_VTENTRY", /* name */
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| 276 |
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FALSE, /* partial_inplace */
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| 277 |
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0, /* src_mask */
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| 278 |
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0, /* dst_mask */
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| 279 |
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FALSE), /* pcrel_offset */
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| 280 |
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|
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| 281 |
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/* A 24 bit relocation */
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| 282 |
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HOWTO (R_M68HC11_24, /* type */
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| 283 |
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0, /* rightshift */
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| 284 |
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2, /* size (0 = byte, 1 = short, 2 = long) */
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| 285 |
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24, /* bitsize */
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| 286 |
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FALSE, /* pc_relative */
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| 287 |
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0, /* bitpos */
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| 288 |
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complain_overflow_dont, /* complain_on_overflow */
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| 289 |
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m68hc11_elf_special_reloc, /* special_function */
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| 290 |
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"R_M68HC12_24", /* name */
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| 291 |
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FALSE, /* partial_inplace */
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| 292 |
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0xffffff, /* src_mask */
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| 293 |
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0xffffff, /* dst_mask */
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| 294 |
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FALSE), /* pcrel_offset */
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| 295 |
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|
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| 296 |
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/* A 16-bit low relocation */
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| 297 |
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HOWTO (R_M68HC11_LO16, /* type */
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| 298 |
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0, /* rightshift */
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| 299 |
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1, /* size (0 = byte, 1 = short, 2 = long) */
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| 300 |
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16, /* bitsize */
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| 301 |
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FALSE, /* pc_relative */
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| 302 |
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0, /* bitpos */
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| 303 |
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complain_overflow_dont, /* complain_on_overflow */
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| 304 |
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m68hc11_elf_special_reloc,/* special_function */
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| 305 |
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"R_M68HC12_LO16", /* name */
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| 306 |
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FALSE, /* partial_inplace */
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| 307 |
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0xffff, /* src_mask */
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| 308 |
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0xffff, /* dst_mask */
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| 309 |
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FALSE), /* pcrel_offset */
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| 310 |
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| 311 |
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/* A page relocation */
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| 312 |
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HOWTO (R_M68HC11_PAGE, /* type */
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| 313 |
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0, /* rightshift */
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| 314 |
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0, /* size (0 = byte, 1 = short, 2 = long) */
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| 315 |
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8, /* bitsize */
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| 316 |
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FALSE, /* pc_relative */
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| 317 |
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0, /* bitpos */
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| 318 |
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complain_overflow_dont, /* complain_on_overflow */
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| 319 |
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m68hc11_elf_special_reloc,/* special_function */
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| 320 |
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"R_M68HC12_PAGE", /* name */
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| 321 |
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FALSE, /* partial_inplace */
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| 322 |
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0x00ff, /* src_mask */
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| 323 |
|
|
0x00ff, /* dst_mask */
|
| 324 |
|
|
FALSE), /* pcrel_offset */
|
| 325 |
|
|
|
| 326 |
|
|
EMPTY_HOWTO (14),
|
| 327 |
|
|
EMPTY_HOWTO (15),
|
| 328 |
|
|
EMPTY_HOWTO (16),
|
| 329 |
|
|
EMPTY_HOWTO (17),
|
| 330 |
|
|
EMPTY_HOWTO (18),
|
| 331 |
|
|
EMPTY_HOWTO (19),
|
| 332 |
|
|
|
| 333 |
|
|
/* Mark beginning of a jump instruction (any form). */
|
| 334 |
|
|
HOWTO (R_M68HC11_RL_JUMP, /* type */
|
| 335 |
|
|
0, /* rightshift */
|
| 336 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 337 |
|
|
0, /* bitsize */
|
| 338 |
|
|
FALSE, /* pc_relative */
|
| 339 |
|
|
0, /* bitpos */
|
| 340 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 341 |
|
|
m68hc11_elf_ignore_reloc, /* special_function */
|
| 342 |
|
|
"R_M68HC12_RL_JUMP", /* name */
|
| 343 |
|
|
TRUE, /* partial_inplace */
|
| 344 |
|
|
0, /* src_mask */
|
| 345 |
|
|
0, /* dst_mask */
|
| 346 |
|
|
TRUE), /* pcrel_offset */
|
| 347 |
|
|
|
| 348 |
|
|
/* Mark beginning of Gcc relaxation group instruction. */
|
| 349 |
|
|
HOWTO (R_M68HC11_RL_GROUP, /* type */
|
| 350 |
|
|
0, /* rightshift */
|
| 351 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 352 |
|
|
0, /* bitsize */
|
| 353 |
|
|
FALSE, /* pc_relative */
|
| 354 |
|
|
0, /* bitpos */
|
| 355 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 356 |
|
|
m68hc11_elf_ignore_reloc, /* special_function */
|
| 357 |
|
|
"R_M68HC12_RL_GROUP", /* name */
|
| 358 |
|
|
TRUE, /* partial_inplace */
|
| 359 |
|
|
0, /* src_mask */
|
| 360 |
|
|
0, /* dst_mask */
|
| 361 |
|
|
TRUE), /* pcrel_offset */
|
| 362 |
|
|
};
|
| 363 |
|
|
|
| 364 |
|
|
/* Map BFD reloc types to M68HC11 ELF reloc types. */
|
| 365 |
|
|
|
| 366 |
|
|
struct m68hc11_reloc_map
|
| 367 |
|
|
{
|
| 368 |
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
| 369 |
|
|
unsigned char elf_reloc_val;
|
| 370 |
|
|
};
|
| 371 |
|
|
|
| 372 |
|
|
static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
|
| 373 |
|
|
{BFD_RELOC_NONE, R_M68HC11_NONE,},
|
| 374 |
|
|
{BFD_RELOC_8, R_M68HC11_8},
|
| 375 |
|
|
{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
|
| 376 |
|
|
{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
|
| 377 |
|
|
{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
|
| 378 |
|
|
{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
|
| 379 |
|
|
{BFD_RELOC_16, R_M68HC11_16},
|
| 380 |
|
|
{BFD_RELOC_32, R_M68HC11_32},
|
| 381 |
|
|
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
|
| 382 |
|
|
|
| 383 |
|
|
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
|
| 384 |
|
|
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
|
| 385 |
|
|
|
| 386 |
|
|
{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
|
| 387 |
|
|
{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
|
| 388 |
|
|
{BFD_RELOC_M68HC11_24, R_M68HC11_24},
|
| 389 |
|
|
|
| 390 |
|
|
{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
|
| 391 |
|
|
{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
|
| 392 |
|
|
};
|
| 393 |
|
|
|
| 394 |
|
|
static reloc_howto_type *
|
| 395 |
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 396 |
|
|
bfd_reloc_code_real_type code)
|
| 397 |
|
|
{
|
| 398 |
|
|
unsigned int i;
|
| 399 |
|
|
|
| 400 |
|
|
for (i = 0;
|
| 401 |
|
|
i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
|
| 402 |
|
|
i++)
|
| 403 |
|
|
{
|
| 404 |
|
|
if (m68hc11_reloc_map[i].bfd_reloc_val == code)
|
| 405 |
|
|
return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
return NULL;
|
| 409 |
|
|
}
|
| 410 |
|
|
|
| 411 |
|
|
static reloc_howto_type *
|
| 412 |
|
|
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 413 |
|
|
const char *r_name)
|
| 414 |
|
|
{
|
| 415 |
|
|
unsigned int i;
|
| 416 |
|
|
|
| 417 |
|
|
for (i = 0;
|
| 418 |
|
|
i < (sizeof (elf_m68hc11_howto_table)
|
| 419 |
|
|
/ sizeof (elf_m68hc11_howto_table[0]));
|
| 420 |
|
|
i++)
|
| 421 |
|
|
if (elf_m68hc11_howto_table[i].name != NULL
|
| 422 |
|
|
&& strcasecmp (elf_m68hc11_howto_table[i].name, r_name) == 0)
|
| 423 |
|
|
return &elf_m68hc11_howto_table[i];
|
| 424 |
|
|
|
| 425 |
|
|
return NULL;
|
| 426 |
|
|
}
|
| 427 |
|
|
|
| 428 |
|
|
/* Set the howto pointer for an M68HC11 ELF reloc. */
|
| 429 |
|
|
|
| 430 |
|
|
static void
|
| 431 |
|
|
m68hc11_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
|
| 432 |
|
|
arelent *cache_ptr, Elf_Internal_Rela *dst)
|
| 433 |
|
|
{
|
| 434 |
|
|
unsigned int r_type;
|
| 435 |
|
|
|
| 436 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
| 437 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
|
| 438 |
|
|
cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
|
| 439 |
|
|
}
|
| 440 |
|
|
|
| 441 |
|
|
|
| 442 |
|
|
/* Far trampoline generation. */
|
| 443 |
|
|
|
| 444 |
|
|
/* Build a 68HC12 trampoline stub. */
|
| 445 |
|
|
static bfd_boolean
|
| 446 |
|
|
m68hc12_elf_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
|
| 447 |
|
|
{
|
| 448 |
|
|
struct elf32_m68hc11_stub_hash_entry *stub_entry;
|
| 449 |
|
|
struct bfd_link_info *info;
|
| 450 |
|
|
struct m68hc11_elf_link_hash_table *htab;
|
| 451 |
|
|
asection *stub_sec;
|
| 452 |
|
|
bfd *stub_bfd;
|
| 453 |
|
|
bfd_byte *loc;
|
| 454 |
|
|
bfd_vma sym_value, phys_page, phys_addr;
|
| 455 |
|
|
|
| 456 |
|
|
/* Massage our args to the form they really have. */
|
| 457 |
|
|
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
|
| 458 |
|
|
info = (struct bfd_link_info *) in_arg;
|
| 459 |
|
|
|
| 460 |
|
|
htab = m68hc11_elf_hash_table (info);
|
| 461 |
|
|
|
| 462 |
|
|
stub_sec = stub_entry->stub_sec;
|
| 463 |
|
|
|
| 464 |
|
|
/* Make a note of the offset within the stubs for this entry. */
|
| 465 |
|
|
stub_entry->stub_offset = stub_sec->size;
|
| 466 |
|
|
stub_sec->size += 7;
|
| 467 |
|
|
loc = stub_sec->contents + stub_entry->stub_offset;
|
| 468 |
|
|
|
| 469 |
|
|
stub_bfd = stub_sec->owner;
|
| 470 |
|
|
|
| 471 |
|
|
/* Create the trampoline call stub:
|
| 472 |
|
|
|
| 473 |
|
|
ldy #%addr(symbol)
|
| 474 |
|
|
call %page(symbol), __trampoline
|
| 475 |
|
|
|
| 476 |
|
|
*/
|
| 477 |
|
|
sym_value = (stub_entry->target_value
|
| 478 |
|
|
+ stub_entry->target_section->output_offset
|
| 479 |
|
|
+ stub_entry->target_section->output_section->vma);
|
| 480 |
|
|
phys_addr = m68hc11_phys_addr (&htab->pinfo, sym_value);
|
| 481 |
|
|
phys_page = m68hc11_phys_page (&htab->pinfo, sym_value);
|
| 482 |
|
|
|
| 483 |
|
|
/* ldy #%page(sym) */
|
| 484 |
|
|
bfd_put_8 (stub_bfd, 0xCD, loc);
|
| 485 |
|
|
bfd_put_16 (stub_bfd, phys_addr, loc + 1);
|
| 486 |
|
|
loc += 3;
|
| 487 |
|
|
|
| 488 |
|
|
/* call %page(sym), __trampoline */
|
| 489 |
|
|
bfd_put_8 (stub_bfd, 0x4a, loc);
|
| 490 |
|
|
bfd_put_16 (stub_bfd, htab->pinfo.trampoline_addr, loc + 1);
|
| 491 |
|
|
bfd_put_8 (stub_bfd, phys_page, loc + 3);
|
| 492 |
|
|
|
| 493 |
|
|
return TRUE;
|
| 494 |
|
|
}
|
| 495 |
|
|
|
| 496 |
|
|
/* As above, but don't actually build the stub. Just bump offset so
|
| 497 |
|
|
we know stub section sizes. */
|
| 498 |
|
|
|
| 499 |
|
|
static bfd_boolean
|
| 500 |
|
|
m68hc12_elf_size_one_stub (struct bfd_hash_entry *gen_entry,
|
| 501 |
|
|
void *in_arg ATTRIBUTE_UNUSED)
|
| 502 |
|
|
{
|
| 503 |
|
|
struct elf32_m68hc11_stub_hash_entry *stub_entry;
|
| 504 |
|
|
|
| 505 |
|
|
/* Massage our args to the form they really have. */
|
| 506 |
|
|
stub_entry = (struct elf32_m68hc11_stub_hash_entry *) gen_entry;
|
| 507 |
|
|
|
| 508 |
|
|
stub_entry->stub_sec->size += 7;
|
| 509 |
|
|
return TRUE;
|
| 510 |
|
|
}
|
| 511 |
|
|
|
| 512 |
|
|
/* Create a 68HC12 ELF linker hash table. */
|
| 513 |
|
|
|
| 514 |
|
|
static struct bfd_link_hash_table *
|
| 515 |
|
|
m68hc12_elf_bfd_link_hash_table_create (bfd *abfd)
|
| 516 |
|
|
{
|
| 517 |
|
|
struct m68hc11_elf_link_hash_table *ret;
|
| 518 |
|
|
|
| 519 |
|
|
ret = m68hc11_elf_hash_table_create (abfd);
|
| 520 |
|
|
if (ret == (struct m68hc11_elf_link_hash_table *) NULL)
|
| 521 |
|
|
return NULL;
|
| 522 |
|
|
|
| 523 |
|
|
ret->size_one_stub = m68hc12_elf_size_one_stub;
|
| 524 |
|
|
ret->build_one_stub = m68hc12_elf_build_one_stub;
|
| 525 |
|
|
|
| 526 |
|
|
return &ret->root.root;
|
| 527 |
|
|
}
|
| 528 |
|
|
|
| 529 |
|
|
static bfd_boolean
|
| 530 |
|
|
m68hc12_elf_set_mach_from_flags (bfd *abfd)
|
| 531 |
|
|
{
|
| 532 |
|
|
flagword flags = elf_elfheader (abfd)->e_flags;
|
| 533 |
|
|
|
| 534 |
|
|
switch (flags & EF_M68HC11_MACH_MASK)
|
| 535 |
|
|
{
|
| 536 |
|
|
case EF_M68HC12_MACH:
|
| 537 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812);
|
| 538 |
|
|
break;
|
| 539 |
|
|
case EF_M68HCS12_MACH:
|
| 540 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12, bfd_mach_m6812s);
|
| 541 |
|
|
break;
|
| 542 |
|
|
case EF_M68HC11_GENERIC:
|
| 543 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_m68hc12,
|
| 544 |
|
|
bfd_mach_m6812_default);
|
| 545 |
|
|
break;
|
| 546 |
|
|
default:
|
| 547 |
|
|
return FALSE;
|
| 548 |
|
|
}
|
| 549 |
|
|
return TRUE;
|
| 550 |
|
|
}
|
| 551 |
|
|
|
| 552 |
|
|
/* Specific sections:
|
| 553 |
|
|
- The .page0 is a data section that is mapped in [0x0000..0x00FF].
|
| 554 |
|
|
Page0 accesses are faster on the M68HC12.
|
| 555 |
|
|
- The .vectors is the section that represents the interrupt
|
| 556 |
|
|
vectors. */
|
| 557 |
|
|
static const struct bfd_elf_special_section elf32_m68hc12_special_sections[] =
|
| 558 |
|
|
{
|
| 559 |
|
|
{ STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
| 560 |
|
|
{ STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
|
| 561 |
|
|
{ STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
|
| 562 |
|
|
{ STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
|
| 563 |
|
|
{ NULL, 0, 0, 0, 0 }
|
| 564 |
|
|
};
|
| 565 |
|
|
|
| 566 |
|
|
#define ELF_ARCH bfd_arch_m68hc12
|
| 567 |
|
|
#define ELF_TARGET_ID M68HC11_ELF_DATA
|
| 568 |
|
|
#define ELF_MACHINE_CODE EM_68HC12
|
| 569 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 570 |
|
|
|
| 571 |
|
|
#define TARGET_BIG_SYM bfd_elf32_m68hc12_vec
|
| 572 |
|
|
#define TARGET_BIG_NAME "elf32-m68hc12"
|
| 573 |
|
|
|
| 574 |
|
|
#define elf_info_to_howto 0
|
| 575 |
|
|
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
|
| 576 |
|
|
#define elf_backend_check_relocs elf32_m68hc11_check_relocs
|
| 577 |
|
|
#define elf_backend_relocate_section elf32_m68hc11_relocate_section
|
| 578 |
|
|
#define elf_backend_object_p m68hc12_elf_set_mach_from_flags
|
| 579 |
|
|
#define elf_backend_final_write_processing 0
|
| 580 |
|
|
#define elf_backend_can_gc_sections 1
|
| 581 |
|
|
#define elf_backend_special_sections elf32_m68hc12_special_sections
|
| 582 |
|
|
#define elf_backend_post_process_headers elf32_m68hc11_post_process_headers
|
| 583 |
|
|
#define elf_backend_add_symbol_hook elf32_m68hc11_add_symbol_hook
|
| 584 |
166 |
khays |
#define elf_backend_merge_symbol_attribute elf32_m68hc11_merge_symbol_attribute
|
| 585 |
14 |
khays |
|
| 586 |
|
|
#define bfd_elf32_bfd_link_hash_table_create \
|
| 587 |
|
|
m68hc12_elf_bfd_link_hash_table_create
|
| 588 |
|
|
#define bfd_elf32_bfd_link_hash_table_free \
|
| 589 |
|
|
m68hc11_elf_bfd_link_hash_table_free
|
| 590 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data \
|
| 591 |
|
|
_bfd_m68hc11_elf_merge_private_bfd_data
|
| 592 |
|
|
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
|
| 593 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data \
|
| 594 |
|
|
_bfd_m68hc11_elf_print_private_bfd_data
|
| 595 |
|
|
|
| 596 |
|
|
#include "elf32-target.h"
|
