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9b701e4403
(elf32_m68hc11_gc_sweep_hook): Likewise. (elf_backend_gc_mark_hook): Define for GC section support. (elf_backend_gc_sweep_hook): Likewise. (elf_backend_can_gc_sections): Likewise. * elf32-m68hc12.c: Likewise.
597 lines
18 KiB
C
597 lines
18 KiB
C
/* Motorola 68HC11-specific support for 32-bit ELF
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Copyright 1999, 2000, 2001, 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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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd * abfd, bfd_reloc_code_real_type code));
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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 *abfd, arelent *reloc_entry,
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asymbol *symbol, PTR data, asection *input_section,
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bfd *output_bfd, char **error_message));
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/* GC mark and sweep. */
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static asection *elf32_m68hc11_gc_mark_hook
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PARAMS ((bfd *abfd, struct bfd_link_info *info,
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Elf_Internal_Rela *rel, struct elf_link_hash_entry *h,
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Elf_Internal_Sym *sym));
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static boolean elf32_m68hc11_gc_sweep_hook
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PARAMS ((bfd *abfd, struct bfd_link_info *info,
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asection *sec, const Elf_Internal_Rela *relocs));
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boolean _bfd_m68hc11_elf_merge_private_bfd_data PARAMS ((bfd*, bfd*));
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boolean _bfd_m68hc11_elf_set_private_flags PARAMS ((bfd*, flagword));
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boolean _bfd_m68hc11_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 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_M68HC11_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_M68HC11_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_M68HC11_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_M68HC11_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_M68HC11_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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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_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_M68HC11_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_M68HC11_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_M68HC11_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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false), /* pcrel_offset */
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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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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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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_M68HC11_GNU_VTENTRY", /* 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 24 bit relocation */
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HOWTO (R_M68HC11_24, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* 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_M68HC11_24", /* 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 16-bit low relocation */
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HOWTO (R_M68HC11_LO16, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M68HC11_LO16", /* 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 page relocation */
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HOWTO (R_M68HC11_PAGE, /* 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_M68HC11_PAGE", /* 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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EMPTY_HOWTO (14),
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EMPTY_HOWTO (15),
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EMPTY_HOWTO (16),
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EMPTY_HOWTO (17),
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EMPTY_HOWTO (18),
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EMPTY_HOWTO (19),
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/* Mark beginning of a jump instruction (any form). */
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HOWTO (R_M68HC11_RL_JUMP, /* 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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m68hc11_elf_ignore_reloc, /* special_function */
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"R_M68HC11_RL_JUMP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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/* Mark beginning of Gcc relaxation group instruction. */
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HOWTO (R_M68HC11_RL_GROUP, /* 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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m68hc11_elf_ignore_reloc, /* special_function */
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"R_M68HC11_RL_GROUP", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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};
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/* Map BFD reloc types to M68HC11 ELF reloc types. */
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struct m68hc11_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct m68hc11_reloc_map m68hc11_reloc_map[] = {
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{BFD_RELOC_NONE, R_M68HC11_NONE,},
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{BFD_RELOC_8, R_M68HC11_8},
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{BFD_RELOC_M68HC11_HI8, R_M68HC11_HI8},
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{BFD_RELOC_M68HC11_LO8, R_M68HC11_LO8},
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{BFD_RELOC_8_PCREL, R_M68HC11_PCREL_8},
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{BFD_RELOC_16_PCREL, R_M68HC11_PCREL_16},
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{BFD_RELOC_16, R_M68HC11_16},
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{BFD_RELOC_32, R_M68HC11_32},
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{BFD_RELOC_M68HC11_3B, R_M68HC11_3B},
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{BFD_RELOC_VTABLE_INHERIT, R_M68HC11_GNU_VTINHERIT},
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{BFD_RELOC_VTABLE_ENTRY, R_M68HC11_GNU_VTENTRY},
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{BFD_RELOC_M68HC11_LO16, R_M68HC11_LO16},
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{BFD_RELOC_M68HC11_PAGE, R_M68HC11_PAGE},
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{BFD_RELOC_M68HC11_24, R_M68HC11_24},
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{BFD_RELOC_M68HC11_RL_JUMP, R_M68HC11_RL_JUMP},
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{BFD_RELOC_M68HC11_RL_GROUP, R_M68HC11_RL_GROUP},
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};
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_type_lookup (abfd, code)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd_reloc_code_real_type code;
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (m68hc11_reloc_map) / sizeof (struct m68hc11_reloc_map);
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i++)
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{
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if (m68hc11_reloc_map[i].bfd_reloc_val == code)
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return &elf_m68hc11_howto_table[m68hc11_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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/* This function is used for relocs which are only used for relaxing,
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which the linker should otherwise ignore. */
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static bfd_reloc_status_type
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m68hc11_elf_ignore_reloc (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, error_message)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *reloc_entry;
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asymbol *symbol ATTRIBUTE_UNUSED;
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PTR data ATTRIBUTE_UNUSED;
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asection *input_section;
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bfd *output_bfd;
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char **error_message ATTRIBUTE_UNUSED;
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{
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if (output_bfd != NULL)
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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/* Set the howto pointer for an M68HC11 ELF reloc. */
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static void
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m68hc11_info_to_howto_rel (abfd, cache_ptr, dst)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *cache_ptr;
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Elf32_Internal_Rel *dst;
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_M68HC11_max);
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cache_ptr->howto = &elf_m68hc11_howto_table[r_type];
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}
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static asection *
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elf32_m68hc11_gc_mark_hook (abfd, info, rel, h, sym)
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bfd *abfd;
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struct bfd_link_info *info ATTRIBUTE_UNUSED;
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Elf_Internal_Rela *rel;
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struct elf_link_hash_entry *h;
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Elf_Internal_Sym *sym;
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{
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if (h != NULL)
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{
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switch (ELF32_R_TYPE (rel->r_info))
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{
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default:
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switch (h->root.type)
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{
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case bfd_link_hash_defined:
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case bfd_link_hash_defweak:
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return h->root.u.def.section;
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case bfd_link_hash_common:
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return h->root.u.c.p->section;
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default:
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break;
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}
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}
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}
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else
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{
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if (!(elf_bad_symtab (abfd)
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&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
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&& !((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
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&& sym->st_shndx != SHN_COMMON))
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{
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return bfd_section_from_elf_index (abfd, sym->st_shndx);
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}
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}
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return NULL;
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}
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static boolean
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elf32_m68hc11_gc_sweep_hook (abfd, info, sec, relocs)
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bfd *abfd ATTRIBUTE_UNUSED;
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struct bfd_link_info *info ATTRIBUTE_UNUSED;
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asection *sec ATTRIBUTE_UNUSED;
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const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
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{
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/* We don't use got and plt entries for 68hc11/68hc12. */
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return true;
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}
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/* Set and control ELF flags in ELF header. */
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boolean
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_bfd_m68hc11_elf_set_private_flags (abfd, flags)
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bfd *abfd;
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flagword flags;
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||
{
|
||
BFD_ASSERT (!elf_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
boolean
|
||
_bfd_m68hc11_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags;
|
||
flagword new_flags;
|
||
boolean ok = true;
|
||
|
||
/* Check if we have the same endianess */
|
||
if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
|
||
return false;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_elfheader (obfd)->e_flags |= new_flags & EF_M68HC11_ABI;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (! elf_flags_init (obfd))
|
||
{
|
||
elf_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = new_flags;
|
||
elf_elfheader (obfd)->e_ident[EI_CLASS]
|
||
= elf_elfheader (ibfd)->e_ident[EI_CLASS];
|
||
|
||
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
||
&& bfd_get_arch_info (obfd)->the_default)
|
||
{
|
||
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
|
||
bfd_get_mach (ibfd)))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Check ABI compatibility. */
|
||
if ((new_flags & E_M68HC11_I32) != (old_flags & E_M68HC11_I32))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: linking files compiled for 16-bit integers (-mshort) "
|
||
"and others for 32-bit integers"),
|
||
bfd_archive_filename (ibfd));
|
||
ok = false;
|
||
}
|
||
if ((new_flags & E_M68HC11_F64) != (old_flags & E_M68HC11_F64))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: linking files compiled for 32-bit double (-fshort-double) "
|
||
"and others for 64-bit double"),
|
||
bfd_archive_filename (ibfd));
|
||
ok = false;
|
||
}
|
||
new_flags &= ~EF_M68HC11_ABI;
|
||
old_flags &= ~EF_M68HC11_ABI;
|
||
|
||
/* Warn about any other mismatches */
|
||
if (new_flags != old_flags)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
||
bfd_archive_filename (ibfd), (unsigned long) new_flags,
|
||
(unsigned long) old_flags);
|
||
ok = false;
|
||
}
|
||
|
||
if (! ok)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
boolean
|
||
_bfd_m68hc11_elf_print_private_bfd_data (abfd, ptr)
|
||
bfd *abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
/* Print normal ELF private data. */
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
/* xgettext:c-format */
|
||
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
||
|
||
if (elf_elfheader (abfd)->e_flags & E_M68HC11_I32)
|
||
fprintf (file, _("[abi=32-bit int,"));
|
||
else
|
||
fprintf (file, _("[abi=16-bit int,"));
|
||
|
||
if (elf_elfheader (abfd)->e_flags & E_M68HC11_F64)
|
||
fprintf (file, _(" 64-bit double]"));
|
||
else
|
||
fprintf (file, _(" 32-bit double]"));
|
||
|
||
if (elf_elfheader (abfd)->e_flags & E_M68HC12_BANKS)
|
||
fprintf (file, _(" [memory=bank-model]"));
|
||
else
|
||
fprintf (file, _(" [memory=flat]"));
|
||
|
||
fputc ('\n', file);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Below is the only difference between elf32-m68hc12.c and elf32-m68hc11.c.
|
||
The Motorola spec says to use a different Elf machine code. */
|
||
#define ELF_ARCH bfd_arch_m68hc11
|
||
#define ELF_MACHINE_CODE EM_68HC11
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_m68hc11_vec
|
||
#define TARGET_BIG_NAME "elf32-m68hc11"
|
||
|
||
#define elf_info_to_howto 0
|
||
#define elf_info_to_howto_rel m68hc11_info_to_howto_rel
|
||
#define elf_backend_gc_mark_hook elf32_m68hc11_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook elf32_m68hc11_gc_sweep_hook
|
||
#define elf_backend_object_p 0
|
||
#define elf_backend_final_write_processing 0
|
||
#define elf_backend_can_gc_sections 1
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
_bfd_m68hc11_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags _bfd_m68hc11_elf_set_private_flags
|
||
#define bfd_elf32_bfd_print_private_bfd_data \
|
||
_bfd_m68hc11_elf_print_private_bfd_data
|
||
|
||
#include "elf32-target.h"
|