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julius |
/* M16C/M32C specific support for 32-bit ELF.
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Copyright (C) 2005, 2006, 2007
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Free Software Foundation, Inc.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/m32c.h"
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#include "libiberty.h"
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/* Forward declarations. */
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static reloc_howto_type * m32c_reloc_type_lookup
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(bfd *, bfd_reloc_code_real_type);
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static void m32c_info_to_howto_rela
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(bfd *, arelent *, Elf_Internal_Rela *);
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static bfd_boolean m32c_elf_relocate_section
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(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
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static bfd_boolean m32c_elf_check_relocs
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(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
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static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
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#ifdef DEBUG
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char * m32c_get_reloc (long reloc);
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void dump_symtab (bfd *, void *, void *);
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#endif
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static bfd_boolean m32c_elf_relax_section
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(bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
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static reloc_howto_type m32c_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_M32C_NONE, /* type */
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0, /* rightshift */
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0, /* 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_M32C_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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/* GCC intentionally overflows these next two in order to work
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around limitations in the addressing modes, so don't complain
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about overflow. */
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HOWTO (R_M32C_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, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_24, /* type */
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0, /* rightshift */
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2, /* 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_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_24", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_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_M32C_32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_8_PCREL, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_8_PCREL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_M32C_16_PCREL, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_16_PCREL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_M32C_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_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_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_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_LO16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_HI8, /* 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_M32C_HI8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_HI16, /* 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, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_HI16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_M32C_RL_JUMP, /* type */
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0, /* rightshift */
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0, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_RL_JUMP", /* 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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HOWTO (R_M32C_RL_1ADDR, /* type */
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0, /* rightshift */
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0, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_RL_1ADDR", /* 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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HOWTO (R_M32C_RL_2ADDR, /* type */
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0, /* rightshift */
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0, /* 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_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_M32C_RL_2ADDR", /* 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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};
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/* Map BFD reloc types to M32C ELF reloc types. */
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struct m32c_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int m32c_reloc_val;
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};
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static const struct m32c_reloc_map m32c_reloc_map [] =
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{
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{ BFD_RELOC_NONE, R_M32C_NONE },
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{ BFD_RELOC_16, R_M32C_16 },
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{ BFD_RELOC_24, R_M32C_24 },
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{ BFD_RELOC_32, R_M32C_32 },
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{ BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
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{ BFD_RELOC_16_PCREL, R_M32C_16_PCREL },
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{ BFD_RELOC_8, R_M32C_8 },
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{ BFD_RELOC_LO16, R_M32C_LO16 },
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{ BFD_RELOC_HI16, R_M32C_HI16 },
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{ BFD_RELOC_M32C_HI8, R_M32C_HI8 },
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{ BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP },
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{ BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR },
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{ BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR }
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};
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static reloc_howto_type *
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m32c_reloc_type_lookup
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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 = ARRAY_SIZE (m32c_reloc_map); --i;)
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if (m32c_reloc_map [i].bfd_reloc_val == code)
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return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
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return NULL;
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}
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static reloc_howto_type *
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m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]);
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i++)
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if (m32c_elf_howto_table[i].name != NULL
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&& strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0)
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return &m32c_elf_howto_table[i];
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return NULL;
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}
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/* Set the howto pointer for an M32C ELF reloc. */
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static void
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m32c_info_to_howto_rela
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(bfd * abfd ATTRIBUTE_UNUSED,
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arelent * cache_ptr,
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Elf_Internal_Rela * 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_M32C_max);
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cache_ptr->howto = & m32c_elf_howto_table [r_type];
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}
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/* Relocate an M32C ELF section.
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There is some attempt to make this function usable for many architectures,
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both USE_REL and USE_RELA ['twould be nice if such a critter existed],
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if only to serve as a learning tool.
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The RELOCATE_SECTION function is called by the new ELF backend linker
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to handle the relocations for a section.
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The relocs are always passed as Rela structures; if the section
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actually uses Rel structures, the r_addend field will always be
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zero.
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This function is responsible for adjusting the section contents as
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necessary, and (if using Rela relocs and generating a relocatable
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output file) adjusting the reloc addend as necessary.
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This function does not have to worry about setting the reloc
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address or the reloc symbol index.
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325 |
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LOCAL_SYMS is a pointer to the swapped in local symbols.
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327 |
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LOCAL_SECTIONS is an array giving the section in the input file
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corresponding to the st_shndx field of each local symbol.
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330 |
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The global hash table entry for the global symbols can be found
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332 |
|
|
via elf_sym_hashes (input_bfd).
|
333 |
|
|
|
334 |
|
|
When generating relocatable output, this function must handle
|
335 |
|
|
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
336 |
|
|
going to be the section symbol corresponding to the output
|
337 |
|
|
section, which means that the addend must be adjusted
|
338 |
|
|
accordingly. */
|
339 |
|
|
|
340 |
|
|
static bfd_boolean
|
341 |
|
|
m32c_elf_relocate_section
|
342 |
|
|
(bfd * output_bfd ATTRIBUTE_UNUSED,
|
343 |
|
|
struct bfd_link_info * info,
|
344 |
|
|
bfd * input_bfd,
|
345 |
|
|
asection * input_section,
|
346 |
|
|
bfd_byte * contents,
|
347 |
|
|
Elf_Internal_Rela * relocs,
|
348 |
|
|
Elf_Internal_Sym * local_syms,
|
349 |
|
|
asection ** local_sections)
|
350 |
|
|
{
|
351 |
|
|
Elf_Internal_Shdr * symtab_hdr;
|
352 |
|
|
struct elf_link_hash_entry ** sym_hashes;
|
353 |
|
|
Elf_Internal_Rela * rel;
|
354 |
|
|
Elf_Internal_Rela * relend;
|
355 |
|
|
bfd *dynobj;
|
356 |
|
|
asection *splt;
|
357 |
|
|
|
358 |
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
359 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
360 |
|
|
relend = relocs + input_section->reloc_count;
|
361 |
|
|
|
362 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
363 |
|
|
splt = NULL;
|
364 |
|
|
if (dynobj != NULL)
|
365 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
366 |
|
|
|
367 |
|
|
for (rel = relocs; rel < relend; rel ++)
|
368 |
|
|
{
|
369 |
|
|
reloc_howto_type * howto;
|
370 |
|
|
unsigned long r_symndx;
|
371 |
|
|
Elf_Internal_Sym * sym;
|
372 |
|
|
asection * sec;
|
373 |
|
|
struct elf_link_hash_entry * h;
|
374 |
|
|
bfd_vma relocation;
|
375 |
|
|
bfd_reloc_status_type r;
|
376 |
|
|
const char * name = NULL;
|
377 |
|
|
int r_type;
|
378 |
|
|
|
379 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
380 |
|
|
|
381 |
|
|
/* These are only used for relaxing; we don't actually relocate
|
382 |
|
|
anything with them, so skip them. */
|
383 |
|
|
if (r_type == R_M32C_RL_JUMP
|
384 |
|
|
|| r_type == R_M32C_RL_1ADDR
|
385 |
|
|
|| r_type == R_M32C_RL_2ADDR)
|
386 |
|
|
continue;
|
387 |
|
|
|
388 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
389 |
|
|
|
390 |
|
|
howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
391 |
|
|
h = NULL;
|
392 |
|
|
sym = NULL;
|
393 |
|
|
sec = NULL;
|
394 |
|
|
relocation = 0;
|
395 |
|
|
|
396 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
397 |
|
|
{
|
398 |
|
|
sym = local_syms + r_symndx;
|
399 |
|
|
sec = local_sections [r_symndx];
|
400 |
|
|
relocation = (sec->output_section->vma
|
401 |
|
|
+ sec->output_offset
|
402 |
|
|
+ sym->st_value);
|
403 |
|
|
|
404 |
|
|
name = bfd_elf_string_from_elf_section
|
405 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
406 |
|
|
name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name;
|
407 |
|
|
}
|
408 |
|
|
else
|
409 |
|
|
{
|
410 |
|
|
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
|
411 |
|
|
|
412 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
413 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
414 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
415 |
|
|
|
416 |
|
|
name = h->root.root.string;
|
417 |
|
|
|
418 |
|
|
if (h->root.type == bfd_link_hash_defined
|
419 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
420 |
|
|
{
|
421 |
|
|
sec = h->root.u.def.section;
|
422 |
|
|
relocation = (h->root.u.def.value
|
423 |
|
|
+ sec->output_section->vma
|
424 |
|
|
+ sec->output_offset);
|
425 |
|
|
}
|
426 |
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
427 |
|
|
;
|
428 |
|
|
else if (!info->relocatable)
|
429 |
|
|
{
|
430 |
|
|
if (! ((*info->callbacks->undefined_symbol)
|
431 |
|
|
(info, h->root.root.string, input_bfd,
|
432 |
|
|
input_section, rel->r_offset, TRUE)))
|
433 |
|
|
return FALSE;
|
434 |
|
|
}
|
435 |
|
|
}
|
436 |
|
|
|
437 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
438 |
|
|
{
|
439 |
|
|
/* For relocs against symbols from removed linkonce sections,
|
440 |
|
|
or sections discarded by a linker script, we just want the
|
441 |
|
|
section contents zeroed. Avoid any special processing. */
|
442 |
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
443 |
|
|
rel->r_info = 0;
|
444 |
|
|
rel->r_addend = 0;
|
445 |
|
|
continue;
|
446 |
|
|
}
|
447 |
|
|
|
448 |
|
|
if (info->relocatable)
|
449 |
|
|
{
|
450 |
|
|
/* This is a relocatable link. We don't have to change
|
451 |
|
|
anything, unless the reloc is against a section symbol,
|
452 |
|
|
in which case we have to adjust according to where the
|
453 |
|
|
section symbol winds up in the output section. */
|
454 |
|
|
if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
455 |
|
|
rel->r_addend += sec->output_offset;
|
456 |
|
|
continue;
|
457 |
|
|
}
|
458 |
|
|
|
459 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
460 |
|
|
{
|
461 |
|
|
case R_M32C_16:
|
462 |
|
|
{
|
463 |
|
|
bfd_vma *plt_offset;
|
464 |
|
|
|
465 |
|
|
if (h != NULL)
|
466 |
|
|
plt_offset = &h->plt.offset;
|
467 |
|
|
else
|
468 |
|
|
plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
|
469 |
|
|
|
470 |
|
|
/* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
|
471 |
|
|
relocation, *plt_offset);*/
|
472 |
|
|
if (relocation <= 0xffff)
|
473 |
|
|
{
|
474 |
|
|
/* If the symbol is in range for a 16-bit address, we should
|
475 |
|
|
have deallocated the plt entry in relax_section. */
|
476 |
|
|
BFD_ASSERT (*plt_offset == (bfd_vma) -1);
|
477 |
|
|
}
|
478 |
|
|
else
|
479 |
|
|
{
|
480 |
|
|
/* If the symbol is out of range for a 16-bit address,
|
481 |
|
|
we must have allocated a plt entry. */
|
482 |
|
|
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
|
483 |
|
|
|
484 |
|
|
/* If this is the first time we've processed this symbol,
|
485 |
|
|
fill in the plt entry with the correct symbol address. */
|
486 |
|
|
if ((*plt_offset & 1) == 0)
|
487 |
|
|
{
|
488 |
|
|
unsigned int x;
|
489 |
|
|
|
490 |
|
|
x = 0x000000fc; /* jmpf */
|
491 |
|
|
x |= (relocation << 8) & 0xffffff00;
|
492 |
|
|
bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
|
493 |
|
|
*plt_offset |= 1;
|
494 |
|
|
}
|
495 |
|
|
|
496 |
|
|
relocation = (splt->output_section->vma
|
497 |
|
|
+ splt->output_offset
|
498 |
|
|
+ (*plt_offset & -2));
|
499 |
|
|
if (name)
|
500 |
|
|
{
|
501 |
|
|
char *newname = bfd_malloc (strlen(name)+5);
|
502 |
|
|
strcpy (newname, name);
|
503 |
|
|
strcat(newname, ".plt");
|
504 |
|
|
_bfd_generic_link_add_one_symbol (info,
|
505 |
|
|
input_bfd,
|
506 |
|
|
newname,
|
507 |
|
|
BSF_FUNCTION | BSF_WEAK,
|
508 |
|
|
splt,
|
509 |
|
|
(*plt_offset & -2),
|
510 |
|
|
0,
|
511 |
|
|
1,
|
512 |
|
|
0,
|
513 |
|
|
0);
|
514 |
|
|
}
|
515 |
|
|
}
|
516 |
|
|
}
|
517 |
|
|
break;
|
518 |
|
|
|
519 |
|
|
case R_M32C_HI8:
|
520 |
|
|
case R_M32C_HI16:
|
521 |
|
|
relocation >>= 16;
|
522 |
|
|
break;
|
523 |
|
|
}
|
524 |
|
|
|
525 |
|
|
#if 0
|
526 |
|
|
printf ("relocate %s at %06lx relocation %06lx addend %ld ",
|
527 |
|
|
m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
|
528 |
|
|
rel->r_offset + input_section->output_section->vma + input_section->output_offset,
|
529 |
|
|
relocation, rel->r_addend);
|
530 |
|
|
{
|
531 |
|
|
int i;
|
532 |
|
|
for (i=0; i<4; i++)
|
533 |
|
|
printf (" %02x", contents[rel->r_offset+i]);
|
534 |
|
|
printf ("\n");
|
535 |
|
|
}
|
536 |
|
|
#endif
|
537 |
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
538 |
|
|
contents, rel->r_offset, relocation,
|
539 |
|
|
rel->r_addend);
|
540 |
|
|
|
541 |
|
|
if (r != bfd_reloc_ok)
|
542 |
|
|
{
|
543 |
|
|
const char * msg = (const char *) NULL;
|
544 |
|
|
|
545 |
|
|
switch (r)
|
546 |
|
|
{
|
547 |
|
|
case bfd_reloc_overflow:
|
548 |
|
|
r = info->callbacks->reloc_overflow
|
549 |
|
|
(info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
|
550 |
|
|
input_bfd, input_section, rel->r_offset);
|
551 |
|
|
break;
|
552 |
|
|
|
553 |
|
|
case bfd_reloc_undefined:
|
554 |
|
|
r = info->callbacks->undefined_symbol
|
555 |
|
|
(info, name, input_bfd, input_section, rel->r_offset,
|
556 |
|
|
TRUE);
|
557 |
|
|
break;
|
558 |
|
|
|
559 |
|
|
case bfd_reloc_outofrange:
|
560 |
|
|
msg = _("internal error: out of range error");
|
561 |
|
|
break;
|
562 |
|
|
|
563 |
|
|
case bfd_reloc_notsupported:
|
564 |
|
|
msg = _("internal error: unsupported relocation error");
|
565 |
|
|
break;
|
566 |
|
|
|
567 |
|
|
case bfd_reloc_dangerous:
|
568 |
|
|
msg = _("internal error: dangerous relocation");
|
569 |
|
|
break;
|
570 |
|
|
|
571 |
|
|
default:
|
572 |
|
|
msg = _("internal error: unknown error");
|
573 |
|
|
break;
|
574 |
|
|
}
|
575 |
|
|
|
576 |
|
|
if (msg)
|
577 |
|
|
r = info->callbacks->warning
|
578 |
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
579 |
|
|
|
580 |
|
|
if (! r)
|
581 |
|
|
return FALSE;
|
582 |
|
|
}
|
583 |
|
|
}
|
584 |
|
|
|
585 |
|
|
return TRUE;
|
586 |
|
|
}
|
587 |
|
|
|
588 |
|
|
/* We support 16-bit pointers to code above 64k by generating a thunk
|
589 |
|
|
below 64k containing a JMP instruction to the final address. */
|
590 |
|
|
|
591 |
|
|
static bfd_boolean
|
592 |
|
|
m32c_elf_check_relocs
|
593 |
|
|
(bfd * abfd,
|
594 |
|
|
struct bfd_link_info * info,
|
595 |
|
|
asection * sec,
|
596 |
|
|
const Elf_Internal_Rela * relocs)
|
597 |
|
|
{
|
598 |
|
|
Elf_Internal_Shdr * symtab_hdr;
|
599 |
|
|
struct elf_link_hash_entry ** sym_hashes;
|
600 |
|
|
const Elf_Internal_Rela * rel;
|
601 |
|
|
const Elf_Internal_Rela * rel_end;
|
602 |
|
|
bfd_vma *local_plt_offsets;
|
603 |
|
|
asection *splt;
|
604 |
|
|
bfd *dynobj;
|
605 |
|
|
|
606 |
|
|
if (info->relocatable)
|
607 |
|
|
return TRUE;
|
608 |
|
|
|
609 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
610 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
611 |
|
|
local_plt_offsets = elf_local_got_offsets (abfd);
|
612 |
|
|
splt = NULL;
|
613 |
|
|
dynobj = elf_hash_table(info)->dynobj;
|
614 |
|
|
|
615 |
|
|
rel_end = relocs + sec->reloc_count;
|
616 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
617 |
|
|
{
|
618 |
|
|
struct elf_link_hash_entry *h;
|
619 |
|
|
unsigned long r_symndx;
|
620 |
|
|
bfd_vma *offset;
|
621 |
|
|
|
622 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
623 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
624 |
|
|
h = NULL;
|
625 |
|
|
else
|
626 |
|
|
{
|
627 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
628 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
629 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
630 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
631 |
|
|
}
|
632 |
|
|
|
633 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
634 |
|
|
{
|
635 |
|
|
/* This relocation describes a 16-bit pointer to a function.
|
636 |
|
|
We may need to allocate a thunk in low memory; reserve memory
|
637 |
|
|
for it now. */
|
638 |
|
|
case R_M32C_16:
|
639 |
|
|
if (dynobj == NULL)
|
640 |
|
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
641 |
|
|
if (splt == NULL)
|
642 |
|
|
{
|
643 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
644 |
|
|
if (splt == NULL)
|
645 |
|
|
{
|
646 |
|
|
flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
647 |
|
|
| SEC_IN_MEMORY | SEC_LINKER_CREATED
|
648 |
|
|
| SEC_READONLY | SEC_CODE);
|
649 |
|
|
splt = bfd_make_section_with_flags (dynobj, ".plt", flags);
|
650 |
|
|
if (splt == NULL
|
651 |
|
|
|| ! bfd_set_section_alignment (dynobj, splt, 1))
|
652 |
|
|
return FALSE;
|
653 |
|
|
}
|
654 |
|
|
}
|
655 |
|
|
|
656 |
|
|
if (h != NULL)
|
657 |
|
|
offset = &h->plt.offset;
|
658 |
|
|
else
|
659 |
|
|
{
|
660 |
|
|
if (local_plt_offsets == NULL)
|
661 |
|
|
{
|
662 |
|
|
size_t size;
|
663 |
|
|
unsigned int i;
|
664 |
|
|
|
665 |
|
|
size = symtab_hdr->sh_info * sizeof (bfd_vma);
|
666 |
|
|
local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
|
667 |
|
|
if (local_plt_offsets == NULL)
|
668 |
|
|
return FALSE;
|
669 |
|
|
elf_local_got_offsets (abfd) = local_plt_offsets;
|
670 |
|
|
|
671 |
|
|
for (i = 0; i < symtab_hdr->sh_info; i++)
|
672 |
|
|
local_plt_offsets[i] = (bfd_vma) -1;
|
673 |
|
|
}
|
674 |
|
|
offset = &local_plt_offsets[r_symndx];
|
675 |
|
|
}
|
676 |
|
|
|
677 |
|
|
if (*offset == (bfd_vma) -1)
|
678 |
|
|
{
|
679 |
|
|
*offset = splt->size;
|
680 |
|
|
splt->size += 4;
|
681 |
|
|
}
|
682 |
|
|
break;
|
683 |
|
|
}
|
684 |
|
|
}
|
685 |
|
|
|
686 |
|
|
return TRUE;
|
687 |
|
|
}
|
688 |
|
|
|
689 |
|
|
/* This must exist if dynobj is ever set. */
|
690 |
|
|
|
691 |
|
|
static bfd_boolean
|
692 |
|
|
m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
|
693 |
|
|
struct bfd_link_info *info)
|
694 |
|
|
{
|
695 |
|
|
bfd *dynobj;
|
696 |
|
|
asection *splt;
|
697 |
|
|
|
698 |
|
|
/* As an extra sanity check, verify that all plt entries have
|
699 |
|
|
been filled in. */
|
700 |
|
|
|
701 |
|
|
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
|
702 |
|
|
&& (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
|
703 |
|
|
{
|
704 |
|
|
bfd_byte *contents = splt->contents;
|
705 |
|
|
unsigned int i, size = splt->size;
|
706 |
|
|
for (i = 0; i < size; i += 4)
|
707 |
|
|
{
|
708 |
|
|
unsigned int x = bfd_get_32 (dynobj, contents + i);
|
709 |
|
|
BFD_ASSERT (x != 0);
|
710 |
|
|
}
|
711 |
|
|
}
|
712 |
|
|
|
713 |
|
|
return TRUE;
|
714 |
|
|
}
|
715 |
|
|
|
716 |
|
|
static bfd_boolean
|
717 |
|
|
m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
718 |
|
|
struct bfd_link_info *info)
|
719 |
|
|
{
|
720 |
|
|
bfd *dynobj;
|
721 |
|
|
asection *splt;
|
722 |
|
|
|
723 |
|
|
if (info->relocatable)
|
724 |
|
|
return TRUE;
|
725 |
|
|
|
726 |
|
|
dynobj = elf_hash_table (info)->dynobj;
|
727 |
|
|
if (dynobj == NULL)
|
728 |
|
|
return TRUE;
|
729 |
|
|
|
730 |
|
|
splt = bfd_get_section_by_name (dynobj, ".plt");
|
731 |
|
|
BFD_ASSERT (splt != NULL);
|
732 |
|
|
|
733 |
|
|
splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
|
734 |
|
|
if (splt->contents == NULL)
|
735 |
|
|
return FALSE;
|
736 |
|
|
|
737 |
|
|
return TRUE;
|
738 |
|
|
}
|
739 |
|
|
|
740 |
|
|
/* Function to set the ELF flag bits. */
|
741 |
|
|
|
742 |
|
|
static bfd_boolean
|
743 |
|
|
m32c_elf_set_private_flags (bfd *abfd, flagword flags)
|
744 |
|
|
{
|
745 |
|
|
elf_elfheader (abfd)->e_flags = flags;
|
746 |
|
|
elf_flags_init (abfd) = TRUE;
|
747 |
|
|
return TRUE;
|
748 |
|
|
}
|
749 |
|
|
|
750 |
|
|
/* Merge backend specific data from an object file to the output
|
751 |
|
|
object file when linking. */
|
752 |
|
|
|
753 |
|
|
static bfd_boolean
|
754 |
|
|
m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
755 |
|
|
{
|
756 |
|
|
flagword old_flags, old_partial;
|
757 |
|
|
flagword new_flags, new_partial;
|
758 |
|
|
bfd_boolean error = FALSE;
|
759 |
|
|
char new_opt[80];
|
760 |
|
|
char old_opt[80];
|
761 |
|
|
|
762 |
|
|
new_opt[0] = old_opt[0] = '\0';
|
763 |
|
|
new_flags = elf_elfheader (ibfd)->e_flags;
|
764 |
|
|
old_flags = elf_elfheader (obfd)->e_flags;
|
765 |
|
|
|
766 |
|
|
#ifdef DEBUG
|
767 |
|
|
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
|
768 |
|
|
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
|
769 |
|
|
bfd_get_filename (ibfd));
|
770 |
|
|
#endif
|
771 |
|
|
|
772 |
|
|
if (!elf_flags_init (obfd))
|
773 |
|
|
{
|
774 |
|
|
/* First call, no flags set. */
|
775 |
|
|
elf_flags_init (obfd) = TRUE;
|
776 |
|
|
elf_elfheader (obfd)->e_flags = new_flags;
|
777 |
|
|
}
|
778 |
|
|
|
779 |
|
|
else if (new_flags == old_flags)
|
780 |
|
|
/* Compatible flags are ok. */
|
781 |
|
|
;
|
782 |
|
|
|
783 |
|
|
else /* Possibly incompatible flags. */
|
784 |
|
|
{
|
785 |
|
|
/* Warn if different cpu is used (allow a specific cpu to override
|
786 |
|
|
the generic cpu). */
|
787 |
|
|
new_partial = (new_flags & EF_M32C_CPU_MASK);
|
788 |
|
|
old_partial = (old_flags & EF_M32C_CPU_MASK);
|
789 |
|
|
if (new_partial == old_partial)
|
790 |
|
|
;
|
791 |
|
|
|
792 |
|
|
else
|
793 |
|
|
{
|
794 |
|
|
switch (new_partial)
|
795 |
|
|
{
|
796 |
|
|
default: strcat (new_opt, " -m16c"); break;
|
797 |
|
|
case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
|
798 |
|
|
case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
|
799 |
|
|
}
|
800 |
|
|
|
801 |
|
|
switch (old_partial)
|
802 |
|
|
{
|
803 |
|
|
default: strcat (old_opt, " -m16c"); break;
|
804 |
|
|
case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
|
805 |
|
|
case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
|
806 |
|
|
}
|
807 |
|
|
}
|
808 |
|
|
|
809 |
|
|
/* Print out any mismatches from above. */
|
810 |
|
|
if (new_opt[0])
|
811 |
|
|
{
|
812 |
|
|
error = TRUE;
|
813 |
|
|
(*_bfd_error_handler)
|
814 |
|
|
(_("%s: compiled with %s and linked with modules compiled with %s"),
|
815 |
|
|
bfd_get_filename (ibfd), new_opt, old_opt);
|
816 |
|
|
}
|
817 |
|
|
|
818 |
|
|
new_flags &= ~ EF_M32C_ALL_FLAGS;
|
819 |
|
|
old_flags &= ~ EF_M32C_ALL_FLAGS;
|
820 |
|
|
|
821 |
|
|
/* Warn about any other mismatches. */
|
822 |
|
|
if (new_flags != old_flags)
|
823 |
|
|
{
|
824 |
|
|
error = TRUE;
|
825 |
|
|
(*_bfd_error_handler)
|
826 |
|
|
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
827 |
|
|
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
|
828 |
|
|
}
|
829 |
|
|
}
|
830 |
|
|
|
831 |
|
|
if (error)
|
832 |
|
|
bfd_set_error (bfd_error_bad_value);
|
833 |
|
|
|
834 |
|
|
return !error;
|
835 |
|
|
}
|
836 |
|
|
|
837 |
|
|
|
838 |
|
|
static bfd_boolean
|
839 |
|
|
m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
|
840 |
|
|
{
|
841 |
|
|
FILE *file = (FILE *) ptr;
|
842 |
|
|
flagword flags;
|
843 |
|
|
|
844 |
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
845 |
|
|
|
846 |
|
|
/* Print normal ELF private data. */
|
847 |
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
848 |
|
|
|
849 |
|
|
flags = elf_elfheader (abfd)->e_flags;
|
850 |
|
|
fprintf (file, _("private flags = 0x%lx:"), (long)flags);
|
851 |
|
|
|
852 |
|
|
switch (flags & EF_M32C_CPU_MASK)
|
853 |
|
|
{
|
854 |
|
|
default: break;
|
855 |
|
|
case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
|
856 |
|
|
case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
|
857 |
|
|
}
|
858 |
|
|
|
859 |
|
|
fputc ('\n', file);
|
860 |
|
|
return TRUE;
|
861 |
|
|
}
|
862 |
|
|
|
863 |
|
|
/* Return the MACH for an e_flags value. */
|
864 |
|
|
|
865 |
|
|
static int
|
866 |
|
|
elf32_m32c_machine (bfd *abfd)
|
867 |
|
|
{
|
868 |
|
|
switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
|
869 |
|
|
{
|
870 |
|
|
case EF_M32C_CPU_M16C: return bfd_mach_m16c;
|
871 |
|
|
case EF_M32C_CPU_M32C: return bfd_mach_m32c;
|
872 |
|
|
}
|
873 |
|
|
|
874 |
|
|
return bfd_mach_m16c;
|
875 |
|
|
}
|
876 |
|
|
|
877 |
|
|
static bfd_boolean
|
878 |
|
|
m32c_elf_object_p (bfd *abfd)
|
879 |
|
|
{
|
880 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
|
881 |
|
|
elf32_m32c_machine (abfd));
|
882 |
|
|
return TRUE;
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
|
886 |
|
|
#ifdef DEBUG
|
887 |
|
|
void
|
888 |
|
|
dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
|
889 |
|
|
{
|
890 |
|
|
size_t locsymcount;
|
891 |
|
|
Elf_Internal_Sym *isymbuf;
|
892 |
|
|
Elf_Internal_Sym *isymend;
|
893 |
|
|
Elf_Internal_Sym *isym;
|
894 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
895 |
|
|
bfd_boolean free_internal = 0, free_external = 0;
|
896 |
|
|
char * st_info_str;
|
897 |
|
|
char * st_info_stb_str;
|
898 |
|
|
char * st_other_str;
|
899 |
|
|
char * st_shndx_str;
|
900 |
|
|
|
901 |
|
|
if (! internal_syms)
|
902 |
|
|
{
|
903 |
|
|
internal_syms = bfd_malloc (1000);
|
904 |
|
|
free_internal = 1;
|
905 |
|
|
}
|
906 |
|
|
if (! external_syms)
|
907 |
|
|
{
|
908 |
|
|
external_syms = bfd_malloc (1000);
|
909 |
|
|
free_external = 1;
|
910 |
|
|
}
|
911 |
|
|
|
912 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
913 |
|
|
locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
|
914 |
|
|
if (free_internal)
|
915 |
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
916 |
|
|
symtab_hdr->sh_info, 0,
|
917 |
|
|
internal_syms, external_syms, NULL);
|
918 |
|
|
else
|
919 |
|
|
isymbuf = internal_syms;
|
920 |
|
|
isymend = isymbuf + locsymcount;
|
921 |
|
|
|
922 |
|
|
for (isym = isymbuf ; isym < isymend ; isym++)
|
923 |
|
|
{
|
924 |
|
|
switch (ELF_ST_TYPE (isym->st_info))
|
925 |
|
|
{
|
926 |
|
|
case STT_FUNC: st_info_str = "STT_FUNC";
|
927 |
|
|
case STT_SECTION: st_info_str = "STT_SECTION";
|
928 |
|
|
case STT_FILE: st_info_str = "STT_FILE";
|
929 |
|
|
case STT_OBJECT: st_info_str = "STT_OBJECT";
|
930 |
|
|
case STT_TLS: st_info_str = "STT_TLS";
|
931 |
|
|
default: st_info_str = "";
|
932 |
|
|
}
|
933 |
|
|
switch (ELF_ST_BIND (isym->st_info))
|
934 |
|
|
{
|
935 |
|
|
case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
|
936 |
|
|
case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
|
937 |
|
|
default: st_info_stb_str = "";
|
938 |
|
|
}
|
939 |
|
|
switch (ELF_ST_VISIBILITY (isym->st_other))
|
940 |
|
|
{
|
941 |
|
|
case STV_DEFAULT: st_other_str = "STV_DEFAULT";
|
942 |
|
|
case STV_INTERNAL: st_other_str = "STV_INTERNAL";
|
943 |
|
|
case STV_PROTECTED: st_other_str = "STV_PROTECTED";
|
944 |
|
|
default: st_other_str = "";
|
945 |
|
|
}
|
946 |
|
|
switch (isym->st_shndx)
|
947 |
|
|
{
|
948 |
|
|
case SHN_ABS: st_shndx_str = "SHN_ABS";
|
949 |
|
|
case SHN_COMMON: st_shndx_str = "SHN_COMMON";
|
950 |
|
|
case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
|
951 |
|
|
default: st_shndx_str = "";
|
952 |
|
|
}
|
953 |
|
|
|
954 |
|
|
printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
|
955 |
|
|
"st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
|
956 |
|
|
isym,
|
957 |
|
|
(unsigned long) isym->st_value,
|
958 |
|
|
(unsigned long) isym->st_size,
|
959 |
|
|
isym->st_name,
|
960 |
|
|
bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
|
961 |
|
|
isym->st_name),
|
962 |
|
|
isym->st_info, st_info_str, st_info_stb_str,
|
963 |
|
|
isym->st_other, st_other_str,
|
964 |
|
|
isym->st_shndx, st_shndx_str);
|
965 |
|
|
}
|
966 |
|
|
if (free_internal)
|
967 |
|
|
free (internal_syms);
|
968 |
|
|
if (free_external)
|
969 |
|
|
free (external_syms);
|
970 |
|
|
}
|
971 |
|
|
|
972 |
|
|
char *
|
973 |
|
|
m32c_get_reloc (long reloc)
|
974 |
|
|
{
|
975 |
|
|
if (0 <= reloc && reloc < R_M32C_max)
|
976 |
|
|
return m32c_elf_howto_table[reloc].name;
|
977 |
|
|
else
|
978 |
|
|
return "";
|
979 |
|
|
}
|
980 |
|
|
#endif /* DEBUG */
|
981 |
|
|
|
982 |
|
|
/* Handle relaxing. */
|
983 |
|
|
|
984 |
|
|
/* A subroutine of m32c_elf_relax_section. If the global symbol H
|
985 |
|
|
is within the low 64k, remove any entry for it in the plt. */
|
986 |
|
|
|
987 |
|
|
struct relax_plt_data
|
988 |
|
|
{
|
989 |
|
|
asection *splt;
|
990 |
|
|
bfd_boolean *again;
|
991 |
|
|
};
|
992 |
|
|
|
993 |
|
|
static bfd_boolean
|
994 |
|
|
m32c_relax_plt_check (struct elf_link_hash_entry *h,
|
995 |
|
|
PTR xdata)
|
996 |
|
|
{
|
997 |
|
|
struct relax_plt_data *data = (struct relax_plt_data *) xdata;
|
998 |
|
|
|
999 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
1000 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1001 |
|
|
|
1002 |
|
|
if (h->plt.offset != (bfd_vma) -1)
|
1003 |
|
|
{
|
1004 |
|
|
bfd_vma address;
|
1005 |
|
|
|
1006 |
|
|
if (h->root.type == bfd_link_hash_undefined
|
1007 |
|
|
|| h->root.type == bfd_link_hash_undefweak)
|
1008 |
|
|
address = 0;
|
1009 |
|
|
else
|
1010 |
|
|
address = (h->root.u.def.section->output_section->vma
|
1011 |
|
|
+ h->root.u.def.section->output_offset
|
1012 |
|
|
+ h->root.u.def.value);
|
1013 |
|
|
|
1014 |
|
|
if (address <= 0xffff)
|
1015 |
|
|
{
|
1016 |
|
|
h->plt.offset = -1;
|
1017 |
|
|
data->splt->size -= 4;
|
1018 |
|
|
*data->again = TRUE;
|
1019 |
|
|
}
|
1020 |
|
|
}
|
1021 |
|
|
|
1022 |
|
|
return TRUE;
|
1023 |
|
|
}
|
1024 |
|
|
|
1025 |
|
|
/* A subroutine of m32c_elf_relax_section. If the global symbol H
|
1026 |
|
|
previously had a plt entry, give it a new entry offset. */
|
1027 |
|
|
|
1028 |
|
|
static bfd_boolean
|
1029 |
|
|
m32c_relax_plt_realloc (struct elf_link_hash_entry *h,
|
1030 |
|
|
PTR xdata)
|
1031 |
|
|
{
|
1032 |
|
|
bfd_vma *entry = (bfd_vma *) xdata;
|
1033 |
|
|
|
1034 |
|
|
if (h->root.type == bfd_link_hash_warning)
|
1035 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
1036 |
|
|
|
1037 |
|
|
if (h->plt.offset != (bfd_vma) -1)
|
1038 |
|
|
{
|
1039 |
|
|
h->plt.offset = *entry;
|
1040 |
|
|
*entry += 4;
|
1041 |
|
|
}
|
1042 |
|
|
|
1043 |
|
|
return TRUE;
|
1044 |
|
|
}
|
1045 |
|
|
|
1046 |
|
|
static bfd_boolean
|
1047 |
|
|
m32c_elf_relax_plt_section (bfd *dynobj,
|
1048 |
|
|
asection *splt,
|
1049 |
|
|
struct bfd_link_info *info,
|
1050 |
|
|
bfd_boolean *again)
|
1051 |
|
|
{
|
1052 |
|
|
struct relax_plt_data relax_plt_data;
|
1053 |
|
|
bfd *ibfd;
|
1054 |
|
|
|
1055 |
|
|
/* Assume nothing changes. */
|
1056 |
|
|
*again = FALSE;
|
1057 |
|
|
|
1058 |
|
|
if (info->relocatable)
|
1059 |
|
|
return TRUE;
|
1060 |
|
|
|
1061 |
|
|
/* We only relax the .plt section at the moment. */
|
1062 |
|
|
if (dynobj != elf_hash_table (info)->dynobj
|
1063 |
|
|
|| strcmp (splt->name, ".plt") != 0)
|
1064 |
|
|
return TRUE;
|
1065 |
|
|
|
1066 |
|
|
/* Quick check for an empty plt. */
|
1067 |
|
|
if (splt->size == 0)
|
1068 |
|
|
return TRUE;
|
1069 |
|
|
|
1070 |
|
|
/* Map across all global symbols; see which ones happen to
|
1071 |
|
|
fall in the low 64k. */
|
1072 |
|
|
relax_plt_data.splt = splt;
|
1073 |
|
|
relax_plt_data.again = again;
|
1074 |
|
|
elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
|
1075 |
|
|
&relax_plt_data);
|
1076 |
|
|
|
1077 |
|
|
/* Likewise for local symbols, though that's somewhat less convenient
|
1078 |
|
|
as we have to walk the list of input bfds and swap in symbol data. */
|
1079 |
|
|
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
1080 |
|
|
{
|
1081 |
|
|
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
1082 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1083 |
|
|
Elf_Internal_Sym *isymbuf = NULL;
|
1084 |
|
|
unsigned int idx;
|
1085 |
|
|
|
1086 |
|
|
if (! local_plt_offsets)
|
1087 |
|
|
continue;
|
1088 |
|
|
|
1089 |
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
1090 |
|
|
if (symtab_hdr->sh_info != 0)
|
1091 |
|
|
{
|
1092 |
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
1093 |
|
|
if (isymbuf == NULL)
|
1094 |
|
|
isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
|
1095 |
|
|
symtab_hdr->sh_info, 0,
|
1096 |
|
|
NULL, NULL, NULL);
|
1097 |
|
|
if (isymbuf == NULL)
|
1098 |
|
|
return FALSE;
|
1099 |
|
|
}
|
1100 |
|
|
|
1101 |
|
|
for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
|
1102 |
|
|
{
|
1103 |
|
|
Elf_Internal_Sym *isym;
|
1104 |
|
|
asection *tsec;
|
1105 |
|
|
bfd_vma address;
|
1106 |
|
|
|
1107 |
|
|
if (local_plt_offsets[idx] == (bfd_vma) -1)
|
1108 |
|
|
continue;
|
1109 |
|
|
|
1110 |
|
|
isym = &isymbuf[idx];
|
1111 |
|
|
if (isym->st_shndx == SHN_UNDEF)
|
1112 |
|
|
continue;
|
1113 |
|
|
else if (isym->st_shndx == SHN_ABS)
|
1114 |
|
|
tsec = bfd_abs_section_ptr;
|
1115 |
|
|
else if (isym->st_shndx == SHN_COMMON)
|
1116 |
|
|
tsec = bfd_com_section_ptr;
|
1117 |
|
|
else
|
1118 |
|
|
tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
|
1119 |
|
|
|
1120 |
|
|
address = (tsec->output_section->vma
|
1121 |
|
|
+ tsec->output_offset
|
1122 |
|
|
+ isym->st_value);
|
1123 |
|
|
if (address <= 0xffff)
|
1124 |
|
|
{
|
1125 |
|
|
local_plt_offsets[idx] = -1;
|
1126 |
|
|
splt->size -= 4;
|
1127 |
|
|
*again = TRUE;
|
1128 |
|
|
}
|
1129 |
|
|
}
|
1130 |
|
|
|
1131 |
|
|
if (isymbuf != NULL
|
1132 |
|
|
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
1133 |
|
|
{
|
1134 |
|
|
if (! info->keep_memory)
|
1135 |
|
|
free (isymbuf);
|
1136 |
|
|
else
|
1137 |
|
|
{
|
1138 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
1139 |
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
1140 |
|
|
}
|
1141 |
|
|
}
|
1142 |
|
|
}
|
1143 |
|
|
|
1144 |
|
|
/* If we changed anything, walk the symbols again to reallocate
|
1145 |
|
|
.plt entry addresses. */
|
1146 |
|
|
if (*again && splt->size > 0)
|
1147 |
|
|
{
|
1148 |
|
|
bfd_vma entry = 0;
|
1149 |
|
|
|
1150 |
|
|
elf_link_hash_traverse (elf_hash_table (info),
|
1151 |
|
|
m32c_relax_plt_realloc, &entry);
|
1152 |
|
|
|
1153 |
|
|
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
1154 |
|
|
{
|
1155 |
|
|
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
1156 |
|
|
unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
|
1157 |
|
|
unsigned int idx;
|
1158 |
|
|
|
1159 |
|
|
if (! local_plt_offsets)
|
1160 |
|
|
continue;
|
1161 |
|
|
|
1162 |
|
|
for (idx = 0; idx < nlocals; ++idx)
|
1163 |
|
|
if (local_plt_offsets[idx] != (bfd_vma) -1)
|
1164 |
|
|
{
|
1165 |
|
|
local_plt_offsets[idx] = entry;
|
1166 |
|
|
entry += 4;
|
1167 |
|
|
}
|
1168 |
|
|
}
|
1169 |
|
|
}
|
1170 |
|
|
|
1171 |
|
|
return TRUE;
|
1172 |
|
|
}
|
1173 |
|
|
|
1174 |
|
|
static int
|
1175 |
|
|
compare_reloc (const void *e1, const void *e2)
|
1176 |
|
|
{
|
1177 |
|
|
const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
|
1178 |
|
|
const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
|
1179 |
|
|
|
1180 |
|
|
if (i1->r_offset == i2->r_offset)
|
1181 |
|
|
return 0;
|
1182 |
|
|
else
|
1183 |
|
|
return i1->r_offset < i2->r_offset ? -1 : 1;
|
1184 |
|
|
}
|
1185 |
|
|
|
1186 |
|
|
#define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
|
1187 |
|
|
static bfd_vma
|
1188 |
|
|
m32c_offset_for_reloc (bfd *abfd,
|
1189 |
|
|
Elf_Internal_Rela *rel,
|
1190 |
|
|
Elf_Internal_Shdr *symtab_hdr,
|
1191 |
|
|
Elf_External_Sym_Shndx *shndx_buf,
|
1192 |
|
|
Elf_Internal_Sym *intsyms)
|
1193 |
|
|
{
|
1194 |
|
|
bfd_vma symval;
|
1195 |
|
|
|
1196 |
|
|
/* Get the value of the symbol referred to by the reloc. */
|
1197 |
|
|
if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
|
1198 |
|
|
{
|
1199 |
|
|
/* A local symbol. */
|
1200 |
|
|
Elf_Internal_Sym *isym;
|
1201 |
|
|
Elf_External_Sym_Shndx *shndx;
|
1202 |
|
|
asection *ssec;
|
1203 |
|
|
|
1204 |
|
|
|
1205 |
|
|
isym = intsyms + ELF32_R_SYM (rel->r_info);
|
1206 |
|
|
ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
1207 |
|
|
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (rel->r_info) : 0);
|
1208 |
|
|
|
1209 |
|
|
symval = isym->st_value;
|
1210 |
|
|
if (ssec)
|
1211 |
|
|
symval += ssec->output_section->vma
|
1212 |
|
|
+ ssec->output_offset;
|
1213 |
|
|
}
|
1214 |
|
|
else
|
1215 |
|
|
{
|
1216 |
|
|
unsigned long indx;
|
1217 |
|
|
struct elf_link_hash_entry *h;
|
1218 |
|
|
|
1219 |
|
|
/* An external symbol. */
|
1220 |
|
|
indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
|
1221 |
|
|
h = elf_sym_hashes (abfd)[indx];
|
1222 |
|
|
BFD_ASSERT (h != NULL);
|
1223 |
|
|
|
1224 |
|
|
if (h->root.type != bfd_link_hash_defined
|
1225 |
|
|
&& h->root.type != bfd_link_hash_defweak)
|
1226 |
|
|
/* This appears to be a reference to an undefined
|
1227 |
|
|
symbol. Just ignore it--it will be caught by the
|
1228 |
|
|
regular reloc processing. */
|
1229 |
|
|
return 0;
|
1230 |
|
|
|
1231 |
|
|
symval = (h->root.u.def.value
|
1232 |
|
|
+ h->root.u.def.section->output_section->vma
|
1233 |
|
|
+ h->root.u.def.section->output_offset);
|
1234 |
|
|
}
|
1235 |
|
|
return symval;
|
1236 |
|
|
}
|
1237 |
|
|
|
1238 |
|
|
static int bytes_saved = 0;
|
1239 |
|
|
|
1240 |
|
|
static int bytes_to_reloc[] = {
|
1241 |
|
|
R_M32C_NONE,
|
1242 |
|
|
R_M32C_8,
|
1243 |
|
|
R_M32C_16,
|
1244 |
|
|
R_M32C_24,
|
1245 |
|
|
R_M32C_32
|
1246 |
|
|
};
|
1247 |
|
|
|
1248 |
|
|
/* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */
|
1249 |
|
|
|
1250 |
|
|
/* Mask for the number of relocs associated with this insn. */
|
1251 |
|
|
#define RLA_RELOCS 0x0000000f
|
1252 |
|
|
/* Number of bytes gas emitted (before gas's relaxing) */
|
1253 |
|
|
#define RLA_NBYTES 0x00000ff0
|
1254 |
|
|
|
1255 |
|
|
/* If the displacement is within the given range and the new encoding
|
1256 |
|
|
differs from the old encoding (the index), then the insn can be
|
1257 |
|
|
relaxed to the new encoding. */
|
1258 |
|
|
typedef struct {
|
1259 |
|
|
int bytes;
|
1260 |
|
|
unsigned int max_disp;
|
1261 |
|
|
unsigned char new_encoding;
|
1262 |
|
|
} EncodingTable;
|
1263 |
|
|
|
1264 |
|
|
static EncodingTable m16c_addr_encodings[] = {
|
1265 |
|
|
{ 0, 0, 0 }, /* R0 */
|
1266 |
|
|
{ 0, 0, 1 }, /* R1 */
|
1267 |
|
|
{ 0, 0, 2 }, /* R2 */
|
1268 |
|
|
{ 0, 0, 3 }, /* R3 */
|
1269 |
|
|
{ 0, 0, 4 }, /* A0 */
|
1270 |
|
|
{ 0, 0, 5 }, /* A1 */
|
1271 |
|
|
{ 0, 0, 6 }, /* [A0] */
|
1272 |
|
|
{ 0, 0, 7 }, /* [A1] */
|
1273 |
|
|
{ 1, 0, 6 }, /* udsp:8[A0] */
|
1274 |
|
|
{ 1, 0, 7 }, /* udsp:8[A1] */
|
1275 |
|
|
{ 1, 0, 10 }, /* udsp:8[SB] */
|
1276 |
|
|
{ 1, 0, 11 }, /* sdsp:8[FB] */
|
1277 |
|
|
{ 2, 255, 8 }, /* udsp:16[A0] */
|
1278 |
|
|
{ 2, 255, 9 }, /* udsp:16[A1] */
|
1279 |
|
|
{ 2, 255, 10 }, /* udsp:16[SB] */
|
1280 |
|
|
{ 2, 0, 15 }, /* abs:16 */
|
1281 |
|
|
};
|
1282 |
|
|
|
1283 |
|
|
static EncodingTable m16c_jmpaddr_encodings[] = {
|
1284 |
|
|
{ 0, 0, 0 }, /* R0 */
|
1285 |
|
|
{ 0, 0, 1 }, /* R1 */
|
1286 |
|
|
{ 0, 0, 2 }, /* R2 */
|
1287 |
|
|
{ 0, 0, 3 }, /* R3 */
|
1288 |
|
|
{ 0, 0, 4 }, /* A0 */
|
1289 |
|
|
{ 0, 0, 5 }, /* A1 */
|
1290 |
|
|
{ 0, 0, 6 }, /* [A0] */
|
1291 |
|
|
{ 0, 0, 7 }, /* [A1] */
|
1292 |
|
|
{ 1, 0, 6 }, /* udsp:8[A0] */
|
1293 |
|
|
{ 1, 0, 7 }, /* udsp:8[A1] */
|
1294 |
|
|
{ 1, 0, 10 }, /* udsp:8[SB] */
|
1295 |
|
|
{ 1, 0, 11 }, /* sdsp:8[FB] */
|
1296 |
|
|
{ 3, 255, 8 }, /* udsp:20[A0] */
|
1297 |
|
|
{ 3, 255, 9 }, /* udsp:20[A1] */
|
1298 |
|
|
{ 2, 255, 10 }, /* udsp:16[SB] */
|
1299 |
|
|
{ 2, 0, 15 }, /* abs:16 */
|
1300 |
|
|
};
|
1301 |
|
|
|
1302 |
|
|
static EncodingTable m32c_addr_encodings[] = {
|
1303 |
|
|
{ 0, 0, 0 }, /* [A0] */
|
1304 |
|
|
{ 0, 0, 1 }, /* [A1] */
|
1305 |
|
|
{ 0, 0, 2 }, /* A0 */
|
1306 |
|
|
{ 0, 0, 3 }, /* A1 */
|
1307 |
|
|
{ 1, 0, 0 }, /* udsp:8[A0] */
|
1308 |
|
|
{ 1, 0, 1 }, /* udsp:8[A1] */
|
1309 |
|
|
{ 1, 0, 6 }, /* udsp:8[SB] */
|
1310 |
|
|
{ 1, 0, 7 }, /* sdsp:8[FB] */
|
1311 |
|
|
{ 2, 255, 4 }, /* udsp:16[A0] */
|
1312 |
|
|
{ 2, 255, 5 }, /* udsp:16[A1] */
|
1313 |
|
|
{ 2, 255, 6 }, /* udsp:16[SB] */
|
1314 |
|
|
{ 2, 127, 7 }, /* sdsp:16[FB] */
|
1315 |
|
|
{ 3, 65535, 8 }, /* udsp:24[A0] */
|
1316 |
|
|
{ 3, 65535, 9 }, /* udsp:24[A1] */
|
1317 |
|
|
{ 3, 65535, 15 }, /* abs24 */
|
1318 |
|
|
{ 2, 0, 15 }, /* abs16 */
|
1319 |
|
|
{ 0, 0, 16 }, /* R2 */
|
1320 |
|
|
{ 0, 0, 17 }, /* R3 */
|
1321 |
|
|
{ 0, 0, 18 }, /* R0 */
|
1322 |
|
|
{ 0, 0, 19 }, /* R1 */
|
1323 |
|
|
{ 0, 0, 20 }, /* */
|
1324 |
|
|
{ 0, 0, 21 }, /* */
|
1325 |
|
|
{ 0, 0, 22 }, /* */
|
1326 |
|
|
{ 0, 0, 23 }, /* */
|
1327 |
|
|
{ 0, 0, 24 }, /* */
|
1328 |
|
|
{ 0, 0, 25 }, /* */
|
1329 |
|
|
{ 0, 0, 26 }, /* */
|
1330 |
|
|
{ 0, 0, 27 }, /* */
|
1331 |
|
|
{ 0, 0, 28 }, /* */
|
1332 |
|
|
{ 0, 0, 29 }, /* */
|
1333 |
|
|
{ 0, 0, 30 }, /* */
|
1334 |
|
|
{ 0, 0, 31 }, /* */
|
1335 |
|
|
};
|
1336 |
|
|
|
1337 |
|
|
static bfd_boolean
|
1338 |
|
|
m32c_elf_relax_section
|
1339 |
|
|
(bfd * abfd,
|
1340 |
|
|
asection * sec,
|
1341 |
|
|
struct bfd_link_info * link_info,
|
1342 |
|
|
bfd_boolean * again)
|
1343 |
|
|
{
|
1344 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1345 |
|
|
Elf_Internal_Shdr *shndx_hdr;
|
1346 |
|
|
Elf_Internal_Rela *internal_relocs;
|
1347 |
|
|
Elf_Internal_Rela *free_relocs = NULL;
|
1348 |
|
|
Elf_Internal_Rela *irel, *irelend, *srel;
|
1349 |
|
|
bfd_byte * contents = NULL;
|
1350 |
|
|
bfd_byte * free_contents = NULL;
|
1351 |
|
|
Elf_Internal_Sym *intsyms = NULL;
|
1352 |
|
|
Elf_Internal_Sym *free_intsyms = NULL;
|
1353 |
|
|
Elf_External_Sym_Shndx *shndx_buf = NULL;
|
1354 |
|
|
int machine;
|
1355 |
|
|
|
1356 |
|
|
if (abfd == elf_hash_table (link_info)->dynobj
|
1357 |
|
|
&& strcmp (sec->name, ".plt") == 0)
|
1358 |
|
|
return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
|
1359 |
|
|
|
1360 |
|
|
/* Assume nothing changes. */
|
1361 |
|
|
*again = FALSE;
|
1362 |
|
|
|
1363 |
|
|
machine = elf32_m32c_machine (abfd);
|
1364 |
|
|
|
1365 |
|
|
/* We don't have to do anything for a relocatable link, if
|
1366 |
|
|
this section does not have relocs, or if this is not a
|
1367 |
|
|
code section. */
|
1368 |
|
|
if (link_info->relocatable
|
1369 |
|
|
|| (sec->flags & SEC_RELOC) == 0
|
1370 |
|
|
|| sec->reloc_count == 0
|
1371 |
|
|
|| (sec->flags & SEC_CODE) == 0)
|
1372 |
|
|
return TRUE;
|
1373 |
|
|
|
1374 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
1375 |
|
|
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
|
1376 |
|
|
|
1377 |
|
|
/* Get the section contents. */
|
1378 |
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
1379 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
1380 |
|
|
/* Go get them off disk. */
|
1381 |
|
|
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
1382 |
|
|
goto error_return;
|
1383 |
|
|
|
1384 |
|
|
/* Read this BFD's symbols. */
|
1385 |
|
|
/* Get cached copy if it exists. */
|
1386 |
|
|
if (symtab_hdr->contents != NULL)
|
1387 |
|
|
{
|
1388 |
|
|
intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
|
1389 |
|
|
}
|
1390 |
|
|
else
|
1391 |
|
|
{
|
1392 |
|
|
intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
|
1393 |
|
|
symtab_hdr->contents = (bfd_byte *) intsyms;
|
1394 |
|
|
}
|
1395 |
|
|
|
1396 |
|
|
if (shndx_hdr->sh_size != 0)
|
1397 |
|
|
{
|
1398 |
|
|
bfd_size_type amt;
|
1399 |
|
|
|
1400 |
|
|
amt = symtab_hdr->sh_info;
|
1401 |
|
|
amt *= sizeof (Elf_External_Sym_Shndx);
|
1402 |
|
|
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
|
1403 |
|
|
if (shndx_buf == NULL)
|
1404 |
|
|
goto error_return;
|
1405 |
|
|
if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|
1406 |
|
|
|| bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
|
1407 |
|
|
goto error_return;
|
1408 |
|
|
shndx_hdr->contents = (bfd_byte *) shndx_buf;
|
1409 |
|
|
}
|
1410 |
|
|
|
1411 |
|
|
/* Get a copy of the native relocations. */
|
1412 |
|
|
internal_relocs = (_bfd_elf_link_read_relocs
|
1413 |
|
|
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
1414 |
|
|
link_info->keep_memory));
|
1415 |
|
|
if (internal_relocs == NULL)
|
1416 |
|
|
goto error_return;
|
1417 |
|
|
if (! link_info->keep_memory)
|
1418 |
|
|
free_relocs = internal_relocs;
|
1419 |
|
|
|
1420 |
|
|
/* The RL_ relocs must be just before the operand relocs they go
|
1421 |
|
|
with, so we must sort them to guarantee this. */
|
1422 |
|
|
qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
|
1423 |
|
|
compare_reloc);
|
1424 |
|
|
|
1425 |
|
|
/* Walk through them looking for relaxing opportunities. */
|
1426 |
|
|
irelend = internal_relocs + sec->reloc_count;
|
1427 |
|
|
|
1428 |
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
1429 |
|
|
{
|
1430 |
|
|
bfd_vma symval;
|
1431 |
|
|
unsigned char *insn, *gap, *einsn;
|
1432 |
|
|
bfd_vma pc;
|
1433 |
|
|
bfd_signed_vma pcrel;
|
1434 |
|
|
int relax_relocs;
|
1435 |
|
|
int gap_size;
|
1436 |
|
|
int new_type;
|
1437 |
|
|
int posn;
|
1438 |
|
|
int enc;
|
1439 |
|
|
EncodingTable *enctbl;
|
1440 |
|
|
EncodingTable *e;
|
1441 |
|
|
|
1442 |
|
|
if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
|
1443 |
|
|
&& ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
|
1444 |
|
|
&& ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
|
1445 |
|
|
continue;
|
1446 |
|
|
|
1447 |
|
|
srel = irel;
|
1448 |
|
|
|
1449 |
|
|
/* There will always be room for the relaxed insn, since it is smaller
|
1450 |
|
|
than the one it would replace. */
|
1451 |
|
|
BFD_ASSERT (irel->r_offset < sec->size);
|
1452 |
|
|
|
1453 |
|
|
insn = contents + irel->r_offset;
|
1454 |
|
|
relax_relocs = irel->r_addend % 16;
|
1455 |
|
|
|
1456 |
|
|
/* Ok, we only have three relocs we care about, and they're all
|
1457 |
|
|
fake. The lower four bits of the addend is always the number
|
1458 |
|
|
of following relocs (hence the qsort above) that are assigned
|
1459 |
|
|
to this opcode. The next 8 bits of the addend indicates the
|
1460 |
|
|
number of bytes in the insn. We use the rest of them
|
1461 |
|
|
ourselves as flags for the more expensive operations (defines
|
1462 |
|
|
above). The three relocs are:
|
1463 |
|
|
|
1464 |
|
|
RL_JUMP: This marks all direct jump insns. We check the
|
1465 |
|
|
displacement and replace them with shorter jumps if
|
1466 |
|
|
they're in range. We also use this to find JMP.S
|
1467 |
|
|
insns and manually shorten them when we delete bytes.
|
1468 |
|
|
We have to decode these insns to figure out what to
|
1469 |
|
|
do.
|
1470 |
|
|
|
1471 |
|
|
RL_1ADDR: This is a :G or :Q insn, which has a single
|
1472 |
|
|
"standard" operand. We have to extract the type
|
1473 |
|
|
field, see if it's a wide displacement, then figure
|
1474 |
|
|
out if we can replace it with a narrow displacement.
|
1475 |
|
|
We don't have to decode these insns.
|
1476 |
|
|
|
1477 |
|
|
RL_2ADDR: Similarly, but two "standard" operands. Note that
|
1478 |
|
|
r_addend may still be 1, as standard operands don't
|
1479 |
|
|
always have displacements. Gas shouldn't give us one
|
1480 |
|
|
with zero operands, but since we don't know which one
|
1481 |
|
|
has the displacement, we check them both anyway.
|
1482 |
|
|
|
1483 |
|
|
These all point to the beginning of the insn itself, not the
|
1484 |
|
|
operands.
|
1485 |
|
|
|
1486 |
|
|
Note that we only relax one step at a time, relying on the
|
1487 |
|
|
linker to call us repeatedly. Thus, there is no code for
|
1488 |
|
|
JMP.A->JMP.B although that will happen in two steps.
|
1489 |
|
|
Likewise, for 2ADDR relaxes, we do one operand per cycle.
|
1490 |
|
|
*/
|
1491 |
|
|
|
1492 |
|
|
/* Get the value of the symbol referred to by the reloc. Just
|
1493 |
|
|
in case this is the last reloc in the list, use the RL's
|
1494 |
|
|
addend to choose between this reloc (no addend) or the next
|
1495 |
|
|
(yes addend, which means at least one following reloc). */
|
1496 |
|
|
srel = irel + (relax_relocs ? 1 : 0);
|
1497 |
|
|
symval = OFFSET_FOR_RELOC (srel);
|
1498 |
|
|
|
1499 |
|
|
/* Setting gap_size nonzero is the flag which means "something
|
1500 |
|
|
shrunk". */
|
1501 |
|
|
gap_size = 0;
|
1502 |
|
|
gap = NULL;
|
1503 |
|
|
new_type = ELF32_R_TYPE(srel->r_info);
|
1504 |
|
|
|
1505 |
|
|
pc = sec->output_section->vma + sec->output_offset
|
1506 |
|
|
+ srel->r_offset;
|
1507 |
|
|
pcrel = symval - pc + srel->r_addend;
|
1508 |
|
|
|
1509 |
|
|
if (machine == bfd_mach_m16c)
|
1510 |
|
|
{
|
1511 |
|
|
/* R8C / M16C */
|
1512 |
|
|
|
1513 |
|
|
switch (ELF32_R_TYPE(irel->r_info))
|
1514 |
|
|
{
|
1515 |
|
|
|
1516 |
|
|
case R_M32C_RL_JUMP:
|
1517 |
|
|
switch (insn[0])
|
1518 |
|
|
{
|
1519 |
|
|
case 0xfe: /* jmp.b */
|
1520 |
|
|
if (pcrel >= 2 && pcrel <= 9)
|
1521 |
|
|
{
|
1522 |
|
|
/* Relax JMP.B -> JMP.S. We need to get rid of
|
1523 |
|
|
the following reloc though. */
|
1524 |
|
|
insn[0] = 0x60 | (pcrel - 2);
|
1525 |
|
|
new_type = R_M32C_NONE;
|
1526 |
|
|
irel->r_addend = 0x10;
|
1527 |
|
|
gap_size = 1;
|
1528 |
|
|
gap = insn + 1;
|
1529 |
|
|
}
|
1530 |
|
|
break;
|
1531 |
|
|
|
1532 |
|
|
case 0xf4: /* jmp.w */
|
1533 |
|
|
/* 128 is allowed because it will be one byte closer
|
1534 |
|
|
after relaxing. Likewise for all other pc-rel
|
1535 |
|
|
jumps. */
|
1536 |
|
|
if (pcrel <= 128 && pcrel >= -128)
|
1537 |
|
|
{
|
1538 |
|
|
/* Relax JMP.W -> JMP.B */
|
1539 |
|
|
insn[0] = 0xfe;
|
1540 |
|
|
insn[1] = 0;
|
1541 |
|
|
new_type = R_M32C_8_PCREL;
|
1542 |
|
|
gap_size = 1;
|
1543 |
|
|
gap = insn + 2;
|
1544 |
|
|
}
|
1545 |
|
|
break;
|
1546 |
|
|
|
1547 |
|
|
case 0xfc: /* jmp.a */
|
1548 |
|
|
if (pcrel <= 32768 && pcrel >= -32768)
|
1549 |
|
|
{
|
1550 |
|
|
/* Relax JMP.A -> JMP.W */
|
1551 |
|
|
insn[0] = 0xf4;
|
1552 |
|
|
insn[1] = 0;
|
1553 |
|
|
insn[2] = 0;
|
1554 |
|
|
new_type = R_M32C_16_PCREL;
|
1555 |
|
|
gap_size = 1;
|
1556 |
|
|
gap = insn + 3;
|
1557 |
|
|
}
|
1558 |
|
|
break;
|
1559 |
|
|
|
1560 |
|
|
case 0xfd: /* jsr.a */
|
1561 |
|
|
if (pcrel <= 32768 && pcrel >= -32768)
|
1562 |
|
|
{
|
1563 |
|
|
/* Relax JSR.A -> JSR.W */
|
1564 |
|
|
insn[0] = 0xf5;
|
1565 |
|
|
insn[1] = 0;
|
1566 |
|
|
insn[2] = 0;
|
1567 |
|
|
new_type = R_M32C_16_PCREL;
|
1568 |
|
|
gap_size = 1;
|
1569 |
|
|
gap = insn + 3;
|
1570 |
|
|
}
|
1571 |
|
|
break;
|
1572 |
|
|
}
|
1573 |
|
|
break;
|
1574 |
|
|
|
1575 |
|
|
case R_M32C_RL_2ADDR:
|
1576 |
|
|
/* xxxx xxxx srce dest [src-disp] [dest-disp]*/
|
1577 |
|
|
|
1578 |
|
|
enctbl = m16c_addr_encodings;
|
1579 |
|
|
posn = 2;
|
1580 |
|
|
enc = (insn[1] >> 4) & 0x0f;
|
1581 |
|
|
e = & enctbl[enc];
|
1582 |
|
|
|
1583 |
|
|
if (srel->r_offset == irel->r_offset + posn
|
1584 |
|
|
&& e->new_encoding != enc
|
1585 |
|
|
&& symval <= e->max_disp)
|
1586 |
|
|
{
|
1587 |
|
|
insn[1] &= 0x0f;
|
1588 |
|
|
insn[1] |= e->new_encoding << 4;
|
1589 |
|
|
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
|
1590 |
|
|
gap = insn + posn + enctbl[e->new_encoding].bytes;
|
1591 |
|
|
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
|
1592 |
|
|
break;
|
1593 |
|
|
}
|
1594 |
|
|
if (relax_relocs == 2)
|
1595 |
|
|
srel ++;
|
1596 |
|
|
posn += e->bytes;
|
1597 |
|
|
|
1598 |
|
|
goto try_1addr_16;
|
1599 |
|
|
|
1600 |
|
|
case R_M32C_RL_1ADDR:
|
1601 |
|
|
/* xxxx xxxx xxxx dest [disp] */
|
1602 |
|
|
|
1603 |
|
|
enctbl = m16c_addr_encodings;
|
1604 |
|
|
posn = 2;
|
1605 |
|
|
|
1606 |
|
|
/* Check the opcode for jumps. We know it's safe to
|
1607 |
|
|
do this because all 2ADDR insns are at least two
|
1608 |
|
|
bytes long. */
|
1609 |
|
|
enc = insn[0] * 256 + insn[1];
|
1610 |
|
|
enc &= 0xfff0;
|
1611 |
|
|
if (enc == 0x7d20
|
1612 |
|
|
|| enc == 0x7d00
|
1613 |
|
|
|| enc == 0x7d30
|
1614 |
|
|
|| enc == 0x7d10)
|
1615 |
|
|
{
|
1616 |
|
|
enctbl = m16c_jmpaddr_encodings;
|
1617 |
|
|
}
|
1618 |
|
|
|
1619 |
|
|
try_1addr_16:
|
1620 |
|
|
/* srel, posn, and enc must be set here. */
|
1621 |
|
|
|
1622 |
|
|
symval = OFFSET_FOR_RELOC (srel);
|
1623 |
|
|
enc = insn[1] & 0x0f;
|
1624 |
|
|
e = & enctbl[enc];
|
1625 |
|
|
|
1626 |
|
|
if (srel->r_offset == irel->r_offset + posn
|
1627 |
|
|
&& e->new_encoding != enc
|
1628 |
|
|
&& symval <= e->max_disp)
|
1629 |
|
|
{
|
1630 |
|
|
insn[1] &= 0xf0;
|
1631 |
|
|
insn[1] |= e->new_encoding;
|
1632 |
|
|
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
|
1633 |
|
|
gap = insn + posn + enctbl[e->new_encoding].bytes;
|
1634 |
|
|
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
|
1635 |
|
|
break;
|
1636 |
|
|
}
|
1637 |
|
|
|
1638 |
|
|
break;
|
1639 |
|
|
|
1640 |
|
|
} /* Ends switch (reloc type) for m16c. */
|
1641 |
|
|
}
|
1642 |
|
|
else /* machine == bfd_mach_m32c */
|
1643 |
|
|
{
|
1644 |
|
|
/* M32CM / M32C */
|
1645 |
|
|
|
1646 |
|
|
switch (ELF32_R_TYPE(irel->r_info))
|
1647 |
|
|
{
|
1648 |
|
|
|
1649 |
|
|
case R_M32C_RL_JUMP:
|
1650 |
|
|
switch (insn[0])
|
1651 |
|
|
{
|
1652 |
|
|
case 0xbb: /* jmp.b */
|
1653 |
|
|
if (pcrel >= 2 && pcrel <= 9)
|
1654 |
|
|
{
|
1655 |
|
|
int p = pcrel - 2;
|
1656 |
|
|
/* Relax JMP.B -> JMP.S. We need to get rid of
|
1657 |
|
|
the following reloc though. */
|
1658 |
|
|
insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
|
1659 |
|
|
new_type = R_M32C_NONE;
|
1660 |
|
|
irel->r_addend = 0x10;
|
1661 |
|
|
gap_size = 1;
|
1662 |
|
|
gap = insn + 1;
|
1663 |
|
|
}
|
1664 |
|
|
break;
|
1665 |
|
|
|
1666 |
|
|
case 0xce: /* jmp.w */
|
1667 |
|
|
if (pcrel <= 128 && pcrel >= -128)
|
1668 |
|
|
{
|
1669 |
|
|
/* Relax JMP.W -> JMP.B */
|
1670 |
|
|
insn[0] = 0xbb;
|
1671 |
|
|
insn[1] = 0;
|
1672 |
|
|
new_type = R_M32C_8_PCREL;
|
1673 |
|
|
gap_size = 1;
|
1674 |
|
|
gap = insn + 2;
|
1675 |
|
|
}
|
1676 |
|
|
break;
|
1677 |
|
|
|
1678 |
|
|
case 0xcc: /* jmp.a */
|
1679 |
|
|
if (pcrel <= 32768 && pcrel >= -32768)
|
1680 |
|
|
{
|
1681 |
|
|
/* Relax JMP.A -> JMP.W */
|
1682 |
|
|
insn[0] = 0xce;
|
1683 |
|
|
insn[1] = 0;
|
1684 |
|
|
insn[2] = 0;
|
1685 |
|
|
new_type = R_M32C_16_PCREL;
|
1686 |
|
|
gap_size = 1;
|
1687 |
|
|
gap = insn + 3;
|
1688 |
|
|
}
|
1689 |
|
|
break;
|
1690 |
|
|
|
1691 |
|
|
case 0xcd: /* jsr.a */
|
1692 |
|
|
if (pcrel <= 32768 && pcrel >= -32768)
|
1693 |
|
|
{
|
1694 |
|
|
/* Relax JSR.A -> JSR.W */
|
1695 |
|
|
insn[0] = 0xcf;
|
1696 |
|
|
insn[1] = 0;
|
1697 |
|
|
insn[2] = 0;
|
1698 |
|
|
new_type = R_M32C_16_PCREL;
|
1699 |
|
|
gap_size = 1;
|
1700 |
|
|
gap = insn + 3;
|
1701 |
|
|
}
|
1702 |
|
|
break;
|
1703 |
|
|
}
|
1704 |
|
|
break;
|
1705 |
|
|
|
1706 |
|
|
case R_M32C_RL_2ADDR:
|
1707 |
|
|
/* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/
|
1708 |
|
|
|
1709 |
|
|
einsn = insn;
|
1710 |
|
|
posn = 2;
|
1711 |
|
|
if (einsn[0] == 1)
|
1712 |
|
|
{
|
1713 |
|
|
/* prefix; remove it as far as the RL reloc is concerned. */
|
1714 |
|
|
einsn ++;
|
1715 |
|
|
posn ++;
|
1716 |
|
|
}
|
1717 |
|
|
|
1718 |
|
|
enctbl = m32c_addr_encodings;
|
1719 |
|
|
enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
|
1720 |
|
|
e = & enctbl[enc];
|
1721 |
|
|
|
1722 |
|
|
if (srel->r_offset == irel->r_offset + posn
|
1723 |
|
|
&& e->new_encoding != enc
|
1724 |
|
|
&& symval <= e->max_disp)
|
1725 |
|
|
{
|
1726 |
|
|
einsn[0] &= 0x8f;
|
1727 |
|
|
einsn[0] |= (e->new_encoding & 0x1c) << 2;
|
1728 |
|
|
einsn[1] &= 0xcf;
|
1729 |
|
|
einsn[1] |= (e->new_encoding & 0x03) << 4;
|
1730 |
|
|
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
|
1731 |
|
|
gap = insn + posn + enctbl[e->new_encoding].bytes;
|
1732 |
|
|
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
|
1733 |
|
|
break;
|
1734 |
|
|
}
|
1735 |
|
|
if (relax_relocs == 2)
|
1736 |
|
|
srel ++;
|
1737 |
|
|
posn += e->bytes;
|
1738 |
|
|
|
1739 |
|
|
goto try_1addr_32;
|
1740 |
|
|
|
1741 |
|
|
case R_M32C_RL_1ADDR:
|
1742 |
|
|
/* xxxx DDDx DDxx xxxx [disp] */
|
1743 |
|
|
|
1744 |
|
|
einsn = insn;
|
1745 |
|
|
posn = 2;
|
1746 |
|
|
if (einsn[0] == 1)
|
1747 |
|
|
{
|
1748 |
|
|
/* prefix; remove it as far as the RL reloc is concerned. */
|
1749 |
|
|
einsn ++;
|
1750 |
|
|
posn ++;
|
1751 |
|
|
}
|
1752 |
|
|
|
1753 |
|
|
enctbl = m32c_addr_encodings;
|
1754 |
|
|
|
1755 |
|
|
try_1addr_32:
|
1756 |
|
|
/* srel, posn, and enc must be set here. */
|
1757 |
|
|
|
1758 |
|
|
symval = OFFSET_FOR_RELOC (srel);
|
1759 |
|
|
enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
|
1760 |
|
|
e = & enctbl[enc];
|
1761 |
|
|
|
1762 |
|
|
if (srel->r_offset == irel->r_offset + posn
|
1763 |
|
|
&& e->new_encoding != enc
|
1764 |
|
|
&& symval <= e->max_disp)
|
1765 |
|
|
{
|
1766 |
|
|
einsn[0] &= 0xf1;
|
1767 |
|
|
einsn[0] |= (e->new_encoding & 0x1c) >> 1;
|
1768 |
|
|
einsn[1] &= 0x3f;
|
1769 |
|
|
einsn[1] |= (e->new_encoding & 0x03) << 6;
|
1770 |
|
|
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
|
1771 |
|
|
gap = insn + posn + enctbl[e->new_encoding].bytes;
|
1772 |
|
|
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
|
1773 |
|
|
break;
|
1774 |
|
|
}
|
1775 |
|
|
|
1776 |
|
|
break;
|
1777 |
|
|
|
1778 |
|
|
} /* Ends switch (reloc type) for m32c. */
|
1779 |
|
|
}
|
1780 |
|
|
|
1781 |
|
|
if (gap_size == 0)
|
1782 |
|
|
continue;
|
1783 |
|
|
|
1784 |
|
|
*again = TRUE;
|
1785 |
|
|
|
1786 |
|
|
srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
|
1787 |
|
|
|
1788 |
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
1789 |
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
1790 |
|
|
free_relocs = NULL;
|
1791 |
|
|
|
1792 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
1793 |
|
|
free_contents = NULL;
|
1794 |
|
|
|
1795 |
|
|
symtab_hdr->contents = (bfd_byte *) intsyms;
|
1796 |
|
|
free_intsyms = NULL;
|
1797 |
|
|
|
1798 |
|
|
bytes_saved += gap_size;
|
1799 |
|
|
|
1800 |
|
|
if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
|
1801 |
|
|
goto error_return;
|
1802 |
|
|
|
1803 |
|
|
} /* next relocation */
|
1804 |
|
|
|
1805 |
|
|
if (free_relocs != NULL)
|
1806 |
|
|
{
|
1807 |
|
|
free (free_relocs);
|
1808 |
|
|
free_relocs = NULL;
|
1809 |
|
|
}
|
1810 |
|
|
|
1811 |
|
|
if (free_contents != NULL)
|
1812 |
|
|
{
|
1813 |
|
|
if (! link_info->keep_memory)
|
1814 |
|
|
free (free_contents);
|
1815 |
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
1816 |
|
|
else
|
1817 |
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
1818 |
|
|
|
1819 |
|
|
free_contents = NULL;
|
1820 |
|
|
}
|
1821 |
|
|
|
1822 |
|
|
if (shndx_buf != NULL)
|
1823 |
|
|
{
|
1824 |
|
|
shndx_hdr->contents = NULL;
|
1825 |
|
|
free (shndx_buf);
|
1826 |
|
|
}
|
1827 |
|
|
|
1828 |
|
|
if (free_intsyms != NULL)
|
1829 |
|
|
{
|
1830 |
|
|
if (! link_info->keep_memory)
|
1831 |
|
|
free (free_intsyms);
|
1832 |
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
1833 |
|
|
else
|
1834 |
|
|
{
|
1835 |
|
|
symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/;
|
1836 |
|
|
}
|
1837 |
|
|
|
1838 |
|
|
free_intsyms = NULL;
|
1839 |
|
|
}
|
1840 |
|
|
|
1841 |
|
|
return TRUE;
|
1842 |
|
|
|
1843 |
|
|
error_return:
|
1844 |
|
|
if (free_relocs != NULL)
|
1845 |
|
|
free (free_relocs);
|
1846 |
|
|
if (free_contents != NULL)
|
1847 |
|
|
free (free_contents);
|
1848 |
|
|
if (shndx_buf != NULL)
|
1849 |
|
|
{
|
1850 |
|
|
shndx_hdr->contents = NULL;
|
1851 |
|
|
free (shndx_buf);
|
1852 |
|
|
}
|
1853 |
|
|
if (free_intsyms != NULL)
|
1854 |
|
|
free (free_intsyms);
|
1855 |
|
|
return FALSE;
|
1856 |
|
|
}
|
1857 |
|
|
|
1858 |
|
|
/* Delete some bytes from a section while relaxing. */
|
1859 |
|
|
|
1860 |
|
|
static bfd_boolean
|
1861 |
|
|
m32c_elf_relax_delete_bytes
|
1862 |
|
|
(bfd * abfd,
|
1863 |
|
|
asection * sec,
|
1864 |
|
|
bfd_vma addr,
|
1865 |
|
|
int count)
|
1866 |
|
|
{
|
1867 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
1868 |
|
|
Elf_Internal_Shdr *shndx_hdr;
|
1869 |
|
|
int sec_shndx;
|
1870 |
|
|
bfd_byte *contents;
|
1871 |
|
|
Elf_Internal_Rela *irel;
|
1872 |
|
|
Elf_Internal_Rela *irelend;
|
1873 |
|
|
Elf_Internal_Rela *irelalign;
|
1874 |
|
|
bfd_vma toaddr;
|
1875 |
|
|
Elf_Internal_Sym *isym;
|
1876 |
|
|
Elf_Internal_Sym *isymend;
|
1877 |
|
|
Elf_Internal_Sym *intsyms;
|
1878 |
|
|
Elf_External_Sym_Shndx *shndx_buf;
|
1879 |
|
|
Elf_External_Sym_Shndx *shndx;
|
1880 |
|
|
struct elf_link_hash_entry ** sym_hashes;
|
1881 |
|
|
struct elf_link_hash_entry ** end_hashes;
|
1882 |
|
|
unsigned int symcount;
|
1883 |
|
|
|
1884 |
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
1885 |
|
|
|
1886 |
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
1887 |
|
|
power larger than the number of bytes we are deleting. */
|
1888 |
|
|
irelalign = NULL;
|
1889 |
|
|
toaddr = sec->size;
|
1890 |
|
|
|
1891 |
|
|
irel = elf_section_data (sec)->relocs;
|
1892 |
|
|
irelend = irel + sec->reloc_count;
|
1893 |
|
|
|
1894 |
|
|
/* Actually delete the bytes. */
|
1895 |
|
|
memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
|
1896 |
|
|
sec->size -= count;
|
1897 |
|
|
|
1898 |
|
|
/* Adjust all the relocs. */
|
1899 |
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
|
1900 |
|
|
{
|
1901 |
|
|
/* Get the new reloc address. */
|
1902 |
|
|
if (irel->r_offset > addr && irel->r_offset < toaddr)
|
1903 |
|
|
irel->r_offset -= count;
|
1904 |
|
|
|
1905 |
|
|
if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
|
1906 |
|
|
&& irel->r_addend == 0x10 /* one byte insn, no relocs */
|
1907 |
|
|
&& irel->r_offset + 1 < addr
|
1908 |
|
|
&& irel->r_offset + 7 > addr)
|
1909 |
|
|
{
|
1910 |
|
|
bfd_vma disp;
|
1911 |
|
|
unsigned char *insn = &contents[irel->r_offset];
|
1912 |
|
|
disp = *insn;
|
1913 |
|
|
/* This is a JMP.S, which we have to manually update. */
|
1914 |
|
|
if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
|
1915 |
|
|
{
|
1916 |
|
|
if ((*insn & 0xf8) != 0x60)
|
1917 |
|
|
continue;
|
1918 |
|
|
disp = (disp & 7);
|
1919 |
|
|
}
|
1920 |
|
|
else
|
1921 |
|
|
{
|
1922 |
|
|
if ((*insn & 0xce) != 0x4a)
|
1923 |
|
|
continue;
|
1924 |
|
|
disp = ((disp & 0x30) >> 3) | (disp & 1);
|
1925 |
|
|
}
|
1926 |
|
|
if (irel->r_offset + disp + 2 >= addr+count)
|
1927 |
|
|
{
|
1928 |
|
|
disp -= count;
|
1929 |
|
|
if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
|
1930 |
|
|
{
|
1931 |
|
|
*insn = (*insn & 0xf8) | disp;
|
1932 |
|
|
}
|
1933 |
|
|
else
|
1934 |
|
|
{
|
1935 |
|
|
*insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
|
1936 |
|
|
}
|
1937 |
|
|
}
|
1938 |
|
|
}
|
1939 |
|
|
}
|
1940 |
|
|
|
1941 |
|
|
/* Adjust the local symbols defined in this section. */
|
1942 |
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
1943 |
|
|
intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
|
1944 |
|
|
isym = intsyms;
|
1945 |
|
|
isymend = isym + symtab_hdr->sh_info;
|
1946 |
|
|
|
1947 |
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
1948 |
|
|
shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
|
1949 |
|
|
shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
|
1950 |
|
|
shndx = shndx_buf;
|
1951 |
|
|
|
1952 |
|
|
for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
|
1953 |
|
|
{
|
1954 |
|
|
|
1955 |
|
|
if ((int) isym->st_shndx == sec_shndx
|
1956 |
|
|
&& isym->st_value > addr
|
1957 |
|
|
&& isym->st_value < toaddr)
|
1958 |
|
|
{
|
1959 |
|
|
isym->st_value -= count;
|
1960 |
|
|
}
|
1961 |
|
|
}
|
1962 |
|
|
|
1963 |
|
|
/* Now adjust the global symbols defined in this section. */
|
1964 |
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
1965 |
|
|
- symtab_hdr->sh_info);
|
1966 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
1967 |
|
|
// sym_hashes += symtab_hdr->sh_info;
|
1968 |
|
|
end_hashes = sym_hashes + symcount;
|
1969 |
|
|
|
1970 |
|
|
for (; sym_hashes < end_hashes; sym_hashes ++)
|
1971 |
|
|
{
|
1972 |
|
|
struct elf_link_hash_entry * sym_hash = * sym_hashes;
|
1973 |
|
|
|
1974 |
|
|
if (sym_hash &&
|
1975 |
|
|
( sym_hash->root.type == bfd_link_hash_defined
|
1976 |
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
1977 |
|
|
&& sym_hash->root.u.def.section == sec
|
1978 |
|
|
&& sym_hash->root.u.def.value > addr
|
1979 |
|
|
&& sym_hash->root.u.def.value < toaddr)
|
1980 |
|
|
{
|
1981 |
|
|
sym_hash->root.u.def.value -= count;
|
1982 |
|
|
}
|
1983 |
|
|
}
|
1984 |
|
|
|
1985 |
|
|
return TRUE;
|
1986 |
|
|
}
|
1987 |
|
|
|
1988 |
|
|
/* This is for versions of gcc prior to 4.3. */
|
1989 |
|
|
static unsigned int
|
1990 |
|
|
_bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
|
1991 |
|
|
{
|
1992 |
|
|
if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
|
1993 |
|
|
return 2;
|
1994 |
|
|
return 4;
|
1995 |
|
|
}
|
1996 |
|
|
|
1997 |
|
|
|
1998 |
|
|
|
1999 |
|
|
#define ELF_ARCH bfd_arch_m32c
|
2000 |
|
|
#define ELF_MACHINE_CODE EM_M32C
|
2001 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
2002 |
|
|
|
2003 |
|
|
#if 0
|
2004 |
|
|
#define TARGET_BIG_SYM bfd_elf32_m32c_vec
|
2005 |
|
|
#define TARGET_BIG_NAME "elf32-m32c"
|
2006 |
|
|
#else
|
2007 |
|
|
#define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
|
2008 |
|
|
#define TARGET_LITTLE_NAME "elf32-m32c"
|
2009 |
|
|
#endif
|
2010 |
|
|
|
2011 |
|
|
#define elf_info_to_howto_rel NULL
|
2012 |
|
|
#define elf_info_to_howto m32c_info_to_howto_rela
|
2013 |
|
|
#define elf_backend_object_p m32c_elf_object_p
|
2014 |
|
|
#define elf_backend_relocate_section m32c_elf_relocate_section
|
2015 |
|
|
#define elf_backend_check_relocs m32c_elf_check_relocs
|
2016 |
|
|
#define elf_backend_object_p m32c_elf_object_p
|
2017 |
|
|
#define elf_symbol_leading_char ('_')
|
2018 |
|
|
#define elf_backend_always_size_sections \
|
2019 |
|
|
m32c_elf_always_size_sections
|
2020 |
|
|
#define elf_backend_finish_dynamic_sections \
|
2021 |
|
|
m32c_elf_finish_dynamic_sections
|
2022 |
|
|
|
2023 |
|
|
#define elf_backend_can_gc_sections 1
|
2024 |
|
|
#define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
|
2025 |
|
|
|
2026 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
|
2027 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup
|
2028 |
|
|
#define bfd_elf32_bfd_relax_section m32c_elf_relax_section
|
2029 |
|
|
#define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
|
2030 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
|
2031 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
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2032 |
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2033 |
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#include "elf32-target.h"
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