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1181 |
sfurman |
/* Motorola 68HC12-specific support for 32-bit ELF
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Copyright 1999, 2000, 2002 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/m68hc11.h"
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#include "opcode/m68hc11.h"
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void m68hc11_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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static bfd_reloc_status_type m68hc11_elf_ignore_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type m68hc12_elf_special_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static int m68hc12_addr_is_banked PARAMS ((bfd_vma));
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static bfd_vma m68hc12_phys_addr PARAMS ((bfd_vma));
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static bfd_vma m68hc12_phys_page PARAMS ((bfd_vma));
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/* GC mark and sweep. */
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static asection *elf32_m68hc11_gc_mark_hook
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PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean elf32_m68hc11_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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boolean _bfd_m68hc12_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
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boolean _bfd_m68hc12_elf_set_private_flags PARAMS ((bfd *, flagword));
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boolean _bfd_m68hc12_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
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/* Use REL instead of RELA to save space */
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#define USE_REL
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/* The Motorola 68HC11 microcontroler only addresses 64Kb.
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We must handle 8 and 16-bit relocations. The 32-bit relocation
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is defined but not used except by gas when -gstabs is used (which
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is wrong).
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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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| | |
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| call _foo | |
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+-----------+ 0x00BFFF -+---/
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| | |
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| | |
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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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false), /* 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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m68hc12_elf_special_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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| 241 |
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bfd_elf_generic_reloc, /* special_function */
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| 242 |
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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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| 255 |
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complain_overflow_dont, /* complain_on_overflow */
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| 256 |
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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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| 260 |
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0xffff, /* dst_mask */
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| 261 |
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false), /* pcrel_offset */
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| 263 |
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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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| 267 |
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0, /* bitsize */
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| 268 |
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false, /* pc_relative */
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| 269 |
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0, /* bitpos */
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| 270 |
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complain_overflow_dont, /* complain_on_overflow */
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| 271 |
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NULL, /* special_function */
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| 272 |
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"R_M68HC11_GNU_VTINHERIT", /* name */
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| 273 |
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false, /* partial_inplace */
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| 274 |
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0, /* src_mask */
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| 275 |
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0, /* dst_mask */
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| 276 |
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false), /* pcrel_offset */
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| 277 |
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| 278 |
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/* GNU extension to record C++ vtable member usage */
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| 279 |
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HOWTO (R_M68HC11_GNU_VTENTRY, /* type */
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| 280 |
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0, /* rightshift */
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| 281 |
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1, /* size (0 = byte, 1 = short, 2 = long) */
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| 282 |
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0, /* bitsize */
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| 283 |
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false, /* pc_relative */
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| 284 |
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0, /* bitpos */
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| 285 |
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complain_overflow_dont, /* complain_on_overflow */
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| 286 |
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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| 287 |
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"R_M68HC11_GNU_VTENTRY", /* name */
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| 288 |
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false, /* partial_inplace */
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| 289 |
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0, /* src_mask */
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| 290 |
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0, /* dst_mask */
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| 291 |
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false), /* pcrel_offset */
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| 292 |
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| 293 |
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/* A 24 bit relocation */
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| 294 |
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HOWTO (R_M68HC11_24, /* type */
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| 295 |
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0, /* rightshift */
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| 296 |
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1, /* size (0 = byte, 1 = short, 2 = long) */
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| 297 |
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24, /* bitsize */
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| 298 |
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false, /* pc_relative */
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| 299 |
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0, /* bitpos */
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| 300 |
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complain_overflow_dont, /* complain_on_overflow */
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| 301 |
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m68hc12_elf_special_reloc, /* special_function */
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| 302 |
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"R_M68HC12_24", /* name */
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| 303 |
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false, /* partial_inplace */
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| 304 |
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0xffff, /* src_mask */
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| 305 |
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0xffff, /* dst_mask */
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| 306 |
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false), /* pcrel_offset */
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| 307 |
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| 308 |
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/* A 16-bit low relocation */
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| 309 |
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HOWTO (R_M68HC11_LO16, /* type */
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| 310 |
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0, /* rightshift */
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| 311 |
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1, /* size (0 = byte, 1 = short, 2 = long) */
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| 312 |
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16, /* bitsize */
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| 313 |
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false, /* pc_relative */
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| 314 |
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0, /* bitpos */
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| 315 |
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complain_overflow_dont, /* complain_on_overflow */
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| 316 |
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m68hc12_elf_special_reloc,/* special_function */
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| 317 |
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"R_M68HC12_LO16", /* name */
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| 318 |
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false, /* partial_inplace */
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| 319 |
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|
0xffff, /* src_mask */
|
| 320 |
|
|
0xffff, /* dst_mask */
|
| 321 |
|
|
false), /* pcrel_offset */
|
| 322 |
|
|
|
| 323 |
|
|
/* A page relocation */
|
| 324 |
|
|
HOWTO (R_M68HC11_PAGE, /* type */
|
| 325 |
|
|
0, /* rightshift */
|
| 326 |
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
| 327 |
|
|
8, /* bitsize */
|
| 328 |
|
|
false, /* pc_relative */
|
| 329 |
|
|
0, /* bitpos */
|
| 330 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 331 |
|
|
m68hc12_elf_special_reloc,/* special_function */
|
| 332 |
|
|
"R_M68HC12_PAGE", /* name */
|
| 333 |
|
|
false, /* partial_inplace */
|
| 334 |
|
|
0x00ff, /* src_mask */
|
| 335 |
|
|
0x00ff, /* dst_mask */
|
| 336 |
|
|
false), /* pcrel_offset */
|
| 337 |
|
|
|
| 338 |
|
|
EMPTY_HOWTO (14),
|
| 339 |
|
|
EMPTY_HOWTO (15),
|
| 340 |
|
|
EMPTY_HOWTO (16),
|
| 341 |
|
|
EMPTY_HOWTO (17),
|
| 342 |
|
|
EMPTY_HOWTO (18),
|
| 343 |
|
|
EMPTY_HOWTO (19),
|
| 344 |
|
|
|
| 345 |
|
|
/* Mark beginning of a jump instruction (any form). */
|
| 346 |
|
|
HOWTO (R_M68HC11_RL_JUMP, /* type */
|
| 347 |
|
|
0, /* rightshift */
|
| 348 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 349 |
|
|
0, /* bitsize */
|
| 350 |
|
|
false, /* pc_relative */
|
| 351 |
|
|
0, /* bitpos */
|
| 352 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 353 |
|
|
m68hc11_elf_ignore_reloc, /* special_function */
|
| 354 |
|
|
"R_M68HC12_RL_JUMP", /* name */
|
| 355 |
|
|
true, /* partial_inplace */
|
| 356 |
|
|
0, /* src_mask */
|
| 357 |
|
|
0, /* dst_mask */
|
| 358 |
|
|
true), /* pcrel_offset */
|
| 359 |
|
|
|
| 360 |
|
|
/* Mark beginning of Gcc relaxation group instruction. */
|
| 361 |
|
|
HOWTO (R_M68HC11_RL_GROUP, /* type */
|
| 362 |
|
|
0, /* rightshift */
|
| 363 |
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
| 364 |
|
|
0, /* bitsize */
|
| 365 |
|
|
false, /* pc_relative */
|
| 366 |
|
|
0, /* bitpos */
|
| 367 |
|
|
complain_overflow_dont, /* complain_on_overflow */
|
| 368 |
|
|
m68hc11_elf_ignore_reloc, /* special_function */
|
| 369 |
|
|
"R_M68HC12_RL_GROUP", /* name */
|
| 370 |
|
|
true, /* partial_inplace */
|
| 371 |
|
|
0, /* src_mask */
|
| 372 |
|
|
0, /* dst_mask */
|
| 373 |
|
|
true), /* pcrel_offset */
|
| 374 |
|
|
};
|
| 375 |
|
|
|
| 376 |
|
|
/* Map BFD reloc types to M68HC11 ELF reloc types. */
|
| 377 |
|
|
|
| 378 |
|
|
struct m68hc11_reloc_map
|
| 379 |
|
|
{
|
| 380 |
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
| 381 |
|
|
unsigned char elf_reloc_val;
|
| 382 |
|
|
};
|
| 383 |
|
|
|
| 384 |
|
|
static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
|
| 385 |
|
|
{BFD_RELOC_NONE, R_M68HC11_NONE,},
|
| 386 |
|
|
{BFD_RELOC_8, R_M68HC11_8},
|
| 387 |
|
|
{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
|
| 388 |
|
|
{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
|
| 389 |
|
|
{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
|
| 390 |
|
|
{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
|
| 391 |
|
|
{BFD_RELOC_16, R_M68HC11_16},
|
| 392 |
|
|
{BFD_RELOC_32, R_M68HC11_32},
|
| 393 |
|
|
{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
|
| 394 |
|
|
|
| 395 |
|
|
{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
|
| 396 |
|
|
{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
|
| 397 |
|
|
|
| 398 |
|
|
{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
|
| 399 |
|
|
{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
|
| 400 |
|
|
{BFD_RELOC_M68HC11_24, R_M68HC11_24},
|
| 401 |
|
|
|
| 402 |
|
|
{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
|
| 403 |
|
|
{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
|
| 404 |
|
|
};
|
| 405 |
|
|
|
| 406 |
|
|
static reloc_howto_type *
|
| 407 |
|
|
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
| 408 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 409 |
|
|
bfd_reloc_code_real_type code;
|
| 410 |
|
|
{
|
| 411 |
|
|
unsigned int i;
|
| 412 |
|
|
|
| 413 |
|
|
for (i = 0;
|
| 414 |
|
|
i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
|
| 415 |
|
|
i++)
|
| 416 |
|
|
{
|
| 417 |
|
|
if (m68hc11_reloc_map[i].bfd_reloc_val == code)
|
| 418 |
|
|
return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
|
| 419 |
|
|
}
|
| 420 |
|
|
|
| 421 |
|
|
return NULL;
|
| 422 |
|
|
}
|
| 423 |
|
|
|
| 424 |
|
|
/* This function is used for relocs which are only used for relaxing,
|
| 425 |
|
|
which the linker should otherwise ignore. */
|
| 426 |
|
|
|
| 427 |
|
|
static bfd_reloc_status_type
|
| 428 |
|
|
m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
|
| 429 |
|
|
output_bfd, error_message)
|
| 430 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 431 |
|
|
arelent *reloc_entry;
|
| 432 |
|
|
asymbol *symbol ATTRIBUTE_UNUSED;
|
| 433 |
|
|
PTR data ATTRIBUTE_UNUSED;
|
| 434 |
|
|
asection *input_section;
|
| 435 |
|
|
bfd *output_bfd;
|
| 436 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
| 437 |
|
|
{
|
| 438 |
|
|
if (output_bfd != NULL)
|
| 439 |
|
|
reloc_entry->address += input_section->output_offset;
|
| 440 |
|
|
return bfd_reloc_ok;
|
| 441 |
|
|
}
|
| 442 |
|
|
|
| 443 |
|
|
static int
|
| 444 |
|
|
m68hc12_addr_is_banked (addr)
|
| 445 |
|
|
bfd_vma addr;
|
| 446 |
|
|
{
|
| 447 |
|
|
return (addr >= M68HC12_BANK_VIRT) ? 1 : 0;
|
| 448 |
|
|
}
|
| 449 |
|
|
|
| 450 |
|
|
/* Return the physical address seen by the processor, taking
|
| 451 |
|
|
into account banked memory. */
|
| 452 |
|
|
static bfd_vma
|
| 453 |
|
|
m68hc12_phys_addr (addr)
|
| 454 |
|
|
bfd_vma addr;
|
| 455 |
|
|
{
|
| 456 |
|
|
if (addr < M68HC12_BANK_VIRT)
|
| 457 |
|
|
return addr;
|
| 458 |
|
|
|
| 459 |
|
|
/* Map the address to the memory bank. */
|
| 460 |
|
|
addr -= M68HC12_BANK_VIRT;
|
| 461 |
|
|
addr &= M68HC12_BANK_MASK;
|
| 462 |
|
|
addr += M68HC12_BANK_BASE;
|
| 463 |
|
|
return addr;
|
| 464 |
|
|
}
|
| 465 |
|
|
|
| 466 |
|
|
/* Return the page number corresponding to an address in banked memory. */
|
| 467 |
|
|
static bfd_vma
|
| 468 |
|
|
m68hc12_phys_page (addr)
|
| 469 |
|
|
bfd_vma addr;
|
| 470 |
|
|
{
|
| 471 |
|
|
if (addr < M68HC12_BANK_VIRT)
|
| 472 |
|
|
return 0;
|
| 473 |
|
|
|
| 474 |
|
|
/* Map the address to the memory bank. */
|
| 475 |
|
|
addr -= M68HC12_BANK_VIRT;
|
| 476 |
|
|
addr >>= M68HC12_BANK_SHIFT;
|
| 477 |
|
|
addr &= M68HC12_BANK_PAGE_MASK;
|
| 478 |
|
|
return addr;
|
| 479 |
|
|
}
|
| 480 |
|
|
|
| 481 |
|
|
static bfd_reloc_status_type
|
| 482 |
|
|
m68hc12_elf_special_reloc (abfd, reloc_entry, symbol, data, input_section,
|
| 483 |
|
|
output_bfd, error_message)
|
| 484 |
|
|
bfd *abfd;
|
| 485 |
|
|
arelent *reloc_entry;
|
| 486 |
|
|
asymbol *symbol;
|
| 487 |
|
|
PTR data;
|
| 488 |
|
|
asection *input_section;
|
| 489 |
|
|
bfd *output_bfd;
|
| 490 |
|
|
char **error_message ATTRIBUTE_UNUSED;
|
| 491 |
|
|
{
|
| 492 |
|
|
reloc_howto_type *howto;
|
| 493 |
|
|
bfd_vma relocation;
|
| 494 |
|
|
bfd_vma phys_addr;
|
| 495 |
|
|
bfd_vma phys_page;
|
| 496 |
|
|
bfd_vma insn_page;
|
| 497 |
|
|
bfd_vma insn_addr;
|
| 498 |
|
|
|
| 499 |
|
|
if (output_bfd != (bfd *) NULL
|
| 500 |
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
| 501 |
|
|
&& (! reloc_entry->howto->partial_inplace
|
| 502 |
|
|
|| reloc_entry->addend == 0))
|
| 503 |
|
|
{
|
| 504 |
|
|
reloc_entry->address += input_section->output_offset;
|
| 505 |
|
|
return bfd_reloc_ok;
|
| 506 |
|
|
}
|
| 507 |
|
|
|
| 508 |
|
|
if (output_bfd != NULL)
|
| 509 |
|
|
return bfd_reloc_continue;
|
| 510 |
|
|
|
| 511 |
|
|
if (reloc_entry->address > input_section->_cooked_size)
|
| 512 |
|
|
return bfd_reloc_outofrange;
|
| 513 |
|
|
|
| 514 |
|
|
/* Compute relocation. */
|
| 515 |
|
|
relocation = (symbol->value
|
| 516 |
|
|
+ symbol->section->output_section->vma
|
| 517 |
|
|
+ symbol->section->output_offset);
|
| 518 |
|
|
relocation += reloc_entry->addend;
|
| 519 |
|
|
relocation += bfd_get_16 (abfd, (bfd_byte*) data + reloc_entry->address);
|
| 520 |
|
|
|
| 521 |
|
|
/* Do the memory bank mapping. */
|
| 522 |
|
|
phys_addr = m68hc12_phys_addr (relocation);
|
| 523 |
|
|
phys_page = m68hc12_phys_page (relocation);
|
| 524 |
|
|
|
| 525 |
|
|
howto = reloc_entry->howto;
|
| 526 |
|
|
if (howto->complain_on_overflow != complain_overflow_dont
|
| 527 |
|
|
&& (phys_addr & (((bfd_vma) -1) << 16)))
|
| 528 |
|
|
return bfd_reloc_overflow;
|
| 529 |
|
|
|
| 530 |
|
|
switch (howto->type)
|
| 531 |
|
|
{
|
| 532 |
|
|
case R_M68HC11_16:
|
| 533 |
|
|
/* Get virtual address of instruction having the relocation. */
|
| 534 |
|
|
insn_addr = input_section->output_section->vma
|
| 535 |
|
|
+ input_section->output_offset
|
| 536 |
|
|
+ reloc_entry->address;
|
| 537 |
|
|
|
| 538 |
|
|
insn_page = m68hc12_phys_page (insn_addr);
|
| 539 |
|
|
|
| 540 |
|
|
if (m68hc12_addr_is_banked (relocation)
|
| 541 |
|
|
&& m68hc12_addr_is_banked (insn_addr)
|
| 542 |
|
|
&& phys_page != insn_page)
|
| 543 |
|
|
{
|
| 544 |
|
|
*error_message = _("address is not in the same bank");
|
| 545 |
|
|
return bfd_reloc_dangerous;
|
| 546 |
|
|
}
|
| 547 |
|
|
if (m68hc12_addr_is_banked (relocation)
|
| 548 |
|
|
&& !m68hc12_addr_is_banked (insn_addr))
|
| 549 |
|
|
{
|
| 550 |
|
|
*error_message = _("reference to a banked address in "
|
| 551 |
|
|
"the normal address space");
|
| 552 |
|
|
return bfd_reloc_dangerous;
|
| 553 |
|
|
}
|
| 554 |
|
|
|
| 555 |
|
|
case R_M68HC11_LO16:
|
| 556 |
|
|
bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address);
|
| 557 |
|
|
break;
|
| 558 |
|
|
|
| 559 |
|
|
case R_M68HC11_24:
|
| 560 |
|
|
bfd_put_16 (abfd, phys_addr, (bfd_byte*) data + reloc_entry->address);
|
| 561 |
|
|
bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address + 2);
|
| 562 |
|
|
break;
|
| 563 |
|
|
|
| 564 |
|
|
case R_M68HC11_PAGE:
|
| 565 |
|
|
bfd_put_8 (abfd, phys_page, (bfd_byte*) data + reloc_entry->address);
|
| 566 |
|
|
break;
|
| 567 |
|
|
|
| 568 |
|
|
default:
|
| 569 |
|
|
abort ();
|
| 570 |
|
|
break;
|
| 571 |
|
|
}
|
| 572 |
|
|
|
| 573 |
|
|
return bfd_reloc_ok;
|
| 574 |
|
|
}
|
| 575 |
|
|
|
| 576 |
|
|
/* Set the howto pointer for an M68HC11 ELF reloc. */
|
| 577 |
|
|
|
| 578 |
|
|
static void
|
| 579 |
|
|
m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
|
| 580 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 581 |
|
|
arelent *cache_ptr;
|
| 582 |
|
|
Elf32_Internal_Rel *dst;
|
| 583 |
|
|
{
|
| 584 |
|
|
unsigned int r_type;
|
| 585 |
|
|
|
| 586 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
| 587 |
|
|
BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
|
| 588 |
|
|
cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
|
| 589 |
|
|
}
|
| 590 |
|
|
|
| 591 |
|
|
static asection *
|
| 592 |
|
|
elf32_m68hc11_gc_mark_hook (sec, info, rel, h, sym)
|
| 593 |
|
|
asection *sec;
|
| 594 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 595 |
|
|
Elf_Internal_Rela *rel;
|
| 596 |
|
|
struct elf_link_hash_entry *h;
|
| 597 |
|
|
Elf_Internal_Sym *sym;
|
| 598 |
|
|
{
|
| 599 |
|
|
if (h != NULL)
|
| 600 |
|
|
{
|
| 601 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 602 |
|
|
{
|
| 603 |
|
|
default:
|
| 604 |
|
|
switch (h->root.type)
|
| 605 |
|
|
{
|
| 606 |
|
|
case bfd_link_hash_defined:
|
| 607 |
|
|
case bfd_link_hash_defweak:
|
| 608 |
|
|
return h->root.u.def.section;
|
| 609 |
|
|
|
| 610 |
|
|
case bfd_link_hash_common:
|
| 611 |
|
|
return h->root.u.c.p->section;
|
| 612 |
|
|
|
| 613 |
|
|
default:
|
| 614 |
|
|
break;
|
| 615 |
|
|
}
|
| 616 |
|
|
}
|
| 617 |
|
|
}
|
| 618 |
|
|
else
|
| 619 |
|
|
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
| 620 |
|
|
|
| 621 |
|
|
return NULL;
|
| 622 |
|
|
}
|
| 623 |
|
|
|
| 624 |
|
|
static boolean
|
| 625 |
|
|
elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs)
|
| 626 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 627 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 628 |
|
|
asection *sec ATTRIBUTE_UNUSED;
|
| 629 |
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
| 630 |
|
|
{
|
| 631 |
|
|
/* We don't use got and plt entries for 68hc11/68hc12. */
|
| 632 |
|
|
return true;
|
| 633 |
|
|
}
|
| 634 |
|
|
|
| 635 |
|
|
|
| 636 |
|
|
/* Set and control ELF flags in ELF header. */
|
| 637 |
|
|
|
| 638 |
|
|
boolean
|
| 639 |
|
|
_bfd_m68hc12_elf_set_private_flags (abfd, flags)
|
| 640 |
|
|
bfd *abfd;
|
| 641 |
|
|
flagword flags;
|
| 642 |
|
|
{
|
| 643 |
|
|
BFD_ASSERT (!elf_flags_init (abfd)
|
| 644 |
|
|
|| elf_elfheader (abfd)->e_flags == flags);
|
| 645 |
|
|
|
| 646 |
|
|
elf_elfheader (abfd)->e_flags = flags;
|
| 647 |
|
|
elf_flags_init (abfd) = true;
|
| 648 |
|
|
return true;
|
| 649 |
|
|
}
|
| 650 |
|
|
|
| 651 |
|
|
/* Merge backend specific data from an object file to the output
|
| 652 |
|
|
object file when linking. */
|
| 653 |
|
|
|
| 654 |
|
|
boolean
|
| 655 |
|
|
_bfd_m68hc12_elf_merge_private_bfd_data (ibfd, obfd)
|
| 656 |
|
|
bfd *ibfd;
|
| 657 |
|
|
bfd *obfd;
|
| 658 |
|
|
{
|
| 659 |
|
|
flagword old_flags;
|
| 660 |
|
|
flagword new_flags;
|
| 661 |
|
|
boolean ok = true;
|
| 662 |
|
|
|
| 663 |
|
|
/* Check if we have the same endianess */
|
| 664 |
|
|
if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
|
| 665 |
|
|
return false;
|
| 666 |
|
|
|
| 667 |
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
| 668 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
| 669 |
|
|
return true;
|
| 670 |
|
|
|
| 671 |
|
|
new_flags = elf_elfheader (ibfd)->e_flags;
|
| 672 |
|
|
elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
|
| 673 |
|
|
old_flags = elf_elfheader (obfd)->e_flags;
|
| 674 |
|
|
|
| 675 |
|
|
if (! elf_flags_init (obfd))
|
| 676 |
|
|
{
|
| 677 |
|
|
elf_flags_init (obfd) = true;
|
| 678 |
|
|
elf_elfheader (obfd)->e_flags = new_flags;
|
| 679 |
|
|
elf_elfheader (obfd)->e_ident[EI_CLASS]
|
| 680 |
|
|
= elf_elfheader (ibfd)->e_ident[EI_CLASS];
|
| 681 |
|
|
|
| 682 |
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
| 683 |
|
|
&& bfd_get_arch_info (obfd)->the_default)
|
| 684 |
|
|
{
|
| 685 |
|
|
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
|
| 686 |
|
|
bfd_get_mach (ibfd)))
|
| 687 |
|
|
return false;
|
| 688 |
|
|
}
|
| 689 |
|
|
|
| 690 |
|
|
return true;
|
| 691 |
|
|
}
|
| 692 |
|
|
|
| 693 |
|
|
/* Check ABI compatibility. */
|
| 694 |
|
|
if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
|
| 695 |
|
|
{
|
| 696 |
|
|
(*_bfd_error_handler)
|
| 697 |
|
|
(_("%s: linking files compiled for 16-bit integers (-mshort) "
|
| 698 |
|
|
"and others for 32-bit integers"),
|
| 699 |
|
|
bfd_archive_filename (ibfd));
|
| 700 |
|
|
ok = false;
|
| 701 |
|
|
}
|
| 702 |
|
|
if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
|
| 703 |
|
|
{
|
| 704 |
|
|
(*_bfd_error_handler)
|
| 705 |
|
|
(_("%s: linking files compiled for 32-bit double (-fshort-double) "
|
| 706 |
|
|
"and others for 64-bit double"),
|
| 707 |
|
|
bfd_archive_filename (ibfd));
|
| 708 |
|
|
ok = false;
|
| 709 |
|
|
}
|
| 710 |
|
|
new_flags &= ~EF_M68HC11_ABI;
|
| 711 |
|
|
old_flags &= ~EF_M68HC11_ABI;
|
| 712 |
|
|
|
| 713 |
|
|
/* Warn about any other mismatches */
|
| 714 |
|
|
if (new_flags != old_flags)
|
| 715 |
|
|
{
|
| 716 |
|
|
(*_bfd_error_handler)
|
| 717 |
|
|
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
| 718 |
|
|
bfd_archive_filename (ibfd), (unsigned long) new_flags,
|
| 719 |
|
|
(unsigned long) old_flags);
|
| 720 |
|
|
ok = false;
|
| 721 |
|
|
}
|
| 722 |
|
|
|
| 723 |
|
|
if (! ok)
|
| 724 |
|
|
{
|
| 725 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 726 |
|
|
return false;
|
| 727 |
|
|
}
|
| 728 |
|
|
|
| 729 |
|
|
return true;
|
| 730 |
|
|
}
|
| 731 |
|
|
|
| 732 |
|
|
boolean
|
| 733 |
|
|
_bfd_m68hc12_elf_print_private_bfd_data (abfd, ptr)
|
| 734 |
|
|
bfd *abfd;
|
| 735 |
|
|
PTR ptr;
|
| 736 |
|
|
{
|
| 737 |
|
|
FILE *file = (FILE *) ptr;
|
| 738 |
|
|
|
| 739 |
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
| 740 |
|
|
|
| 741 |
|
|
/* Print normal ELF private data. */
|
| 742 |
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
| 743 |
|
|
|
| 744 |
|
|
/* xgettext:c-format */
|
| 745 |
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
| 746 |
|
|
|
| 747 |
|
|
if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32)
|
| 748 |
|
|
fprintf (file, _("[abi=32-bit int,"));
|
| 749 |
|
|
else
|
| 750 |
|
|
fprintf (file, _("[abi=16-bit int,"));
|
| 751 |
|
|
|
| 752 |
|
|
if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
|
| 753 |
|
|
fprintf (file, _(" 64-bit double]"));
|
| 754 |
|
|
else
|
| 755 |
|
|
fprintf (file, _(" 32-bit double]"));
|
| 756 |
|
|
|
| 757 |
|
|
fputc ('\n', file);
|
| 758 |
|
|
|
| 759 |
|
|
return true;
|
| 760 |
|
|
}
|
| 761 |
|
|
|
| 762 |
|
|
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
|
| 763 |
|
|
The Motorola spec says to use a different Elf machine code. */
|
| 764 |
|
|
#define ELF_ARCH bfd_arch_m68hc12
|
| 765 |
|
|
#define ELF_MACHINE_CODE EM_68HC12
|
| 766 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 767 |
|
|
|
| 768 |
|
|
#define TARGET_BIG_SYM bfd_elf32_m68hc12_vec
|
| 769 |
|
|
#define TARGET_BIG_NAME "elf32-m68hc12"
|
| 770 |
|
|
|
| 771 |
|
|
#define elf_info_to_howto 0
|
| 772 |
|
|
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
|
| 773 |
|
|
#define elf_backend_gc_mark_hook elf32_m68hc11_gc_mark_hook
|
| 774 |
|
|
#define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook
|
| 775 |
|
|
#define elf_backend_object_p 0
|
| 776 |
|
|
#define elf_backend_final_write_processing 0
|
| 777 |
|
|
/* Disabled as this backend uses the generic linker. */
|
| 778 |
|
|
#define elf_backend_can_gc_sections 0
|
| 779 |
|
|
|
| 780 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data \
|
| 781 |
|
|
_bfd_m68hc12_elf_merge_private_bfd_data
|
| 782 |
|
|
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc12_elf_set_private_flags
|
| 783 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data \
|
| 784 |
|
|
_bfd_m68hc12_elf_print_private_bfd_data
|
| 785 |
|
|
|
| 786 |
|
|
#include "elf32-target.h"
|
