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markom |
/* OpenRISC-specific support for 32-bit ELF.
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Copyright (C) 2001 Free Software Foundation, Inc.
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Contributed by Johan Rydberg, jrydberg@opencores.org
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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/openrisc.h"
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#include "libiberty.h"
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/* Forward declarations. */
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static reloc_howto_type *openrisc_reloc_type_lookup
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PARAMS ((bfd * , bfd_reloc_code_real_type));
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static void openrisc_info_to_howto_rela
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static boolean openrisc_elf_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static bfd_reloc_status_type openrisc_final_link_relocate
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PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, bfd_vma));
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static boolean openrisc_elf_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static asection *openrisc_elf_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static reloc_howto_type openrisc_elf_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_OPENRISC_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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_OPENRISC_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 PC relative 26 bit relocation, right shifted by 2. */
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HOWTO (R_OPENRISC_INSN_REL_26, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* 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_OPENRISC_INSN_REL_26", /* name */
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false, /* partial_inplace */
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0x00000000, /* src_mask */
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0x03ffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A absolute 26 bit relocation, right shifted by 2. */
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HOWTO (R_OPENRISC_INSN_ABS_26, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* 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_OPENRISC_INSN_ABS_26", /* name */
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false, /* partial_inplace */
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0x00000000, /* src_mask */
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0x03ffffff, /* dst_mask */
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false), /* pcrel_offset */
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HOWTO (R_OPENRISC_LO_16_IN_INSN, /* 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_OPENRISC_LO_16_IN_INSN", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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HOWTO (R_OPENRISC_HI_16_IN_INSN, /* type */
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16, /* 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_OPENRISC_HI_16_IN_INSN", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An 8 bit absolute relocation. */
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HOWTO (R_OPENRISC_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_OPENRISC_8", /* name */
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true, /* partial_inplace */
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0x0000, /* 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_OPENRISC_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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_OPENRISC_16", /* name */
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true, /* partial_inplace */
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0x00000000, /* src_mask */
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0x0000ffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_OPENRISC_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_OPENRISC_32", /* name */
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true, /* partial_inplace */
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0x00000000, /* src_mask */
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0xffffffff, /* 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_OPENRISC_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* 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_OPENRISC_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_OPENRISC_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* 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_OPENRISC_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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};
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/* Map BFD reloc types to OpenRISC ELF reloc types. */
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struct openrisc_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int openrisc_reloc_val;
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};
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static const struct openrisc_reloc_map openrisc_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_OPENRISC_NONE },
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{ BFD_RELOC_32, R_OPENRISC_32 },
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{ BFD_RELOC_16, R_OPENRISC_16 },
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{ BFD_RELOC_8, R_OPENRISC_8 },
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{ BFD_RELOC_OPENRISC_REL_26,R_OPENRISC_INSN_REL_26 },
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{ BFD_RELOC_OPENRISC_ABS_26,R_OPENRISC_INSN_ABS_26 },
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{ BFD_RELOC_HI16, R_OPENRISC_HI_16_IN_INSN },
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{ BFD_RELOC_LO16, R_OPENRISC_LO_16_IN_INSN },
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{ BFD_RELOC_VTABLE_INHERIT, R_OPENRISC_GNU_VTINHERIT },
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{ BFD_RELOC_VTABLE_ENTRY, R_OPENRISC_GNU_VTENTRY }
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};
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static reloc_howto_type *
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openrisc_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 = ARRAY_SIZE (openrisc_reloc_map); --i;)
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if (openrisc_reloc_map[i].bfd_reloc_val == code)
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return & openrisc_elf_howto_table[openrisc_reloc_map[i].
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openrisc_reloc_val];
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return NULL;
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}
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/* Set the howto pointer for an OpenRISC ELF reloc. */
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static void
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openrisc_info_to_howto_rela (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_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_OPENRISC_max);
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cache_ptr->howto = & openrisc_elf_howto_table[r_type];
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}
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/* Perform a single relocation. By default we use the standard BFD
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routines, but a few relocs, we have to do them ourselves. */
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static bfd_reloc_status_type
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openrisc_final_link_relocate (howto, input_bfd, input_section, contents, rel,
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relocation)
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reloc_howto_type *howto;
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bfd *input_bfd;
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asection *input_section;
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bfd_byte *contents;
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Elf_Internal_Rela *rel;
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bfd_vma relocation;
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{
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bfd_reloc_status_type r = bfd_reloc_ok;
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switch (howto->type)
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{
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case R_OPENRISC_LO_16_IN_INSN:
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relocation &= 0xffff;
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r = _bfd_final_link_relocate (howto, input_bfd, input_section,
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contents, rel->r_offset,
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relocation, rel->r_addend);
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break;
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default:
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r = _bfd_final_link_relocate (howto, input_bfd, input_section,
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contents, rel->r_offset,
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relocation, rel->r_addend);
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}
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| 280 |
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| 281 |
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return r;
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| 282 |
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}
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| 283 |
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| 284 |
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/* Relocate an OpenRISC 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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| 288 |
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| 289 |
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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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| 292 |
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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 relocateable
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output file) adjusting the reloc addend as necessary.
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| 300 |
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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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LOCAL_SYMS is a pointer to the swapped in local symbols.
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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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| 307 |
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| 308 |
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The global hash table entry for the global symbols can be found
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via elf_sym_hashes (input_bfd).
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| 310 |
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| 311 |
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When generating relocateable output, this function must handle
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| 312 |
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STB_LOCAL/STT_SECTION symbols specially. The output symbol is
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going to be the section symbol corresponding to the output
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| 314 |
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section, which means that the addend must be adjusted
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accordingly. */
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| 316 |
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| 317 |
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static boolean
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| 318 |
|
|
openrisc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
| 319 |
|
|
contents, relocs, local_syms, local_sections)
|
| 320 |
|
|
bfd *output_bfd ATTRIBUTE_UNUSED;
|
| 321 |
|
|
struct bfd_link_info *info;
|
| 322 |
|
|
bfd *input_bfd;
|
| 323 |
|
|
asection *input_section;
|
| 324 |
|
|
bfd_byte *contents;
|
| 325 |
|
|
Elf_Internal_Rela *relocs;
|
| 326 |
|
|
Elf_Internal_Sym *local_syms;
|
| 327 |
|
|
asection **local_sections;
|
| 328 |
|
|
{
|
| 329 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 330 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 331 |
|
|
Elf_Internal_Rela *rel;
|
| 332 |
|
|
Elf_Internal_Rela *relend;
|
| 333 |
|
|
|
| 334 |
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
| 335 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 336 |
|
|
relend = relocs + input_section->reloc_count;
|
| 337 |
|
|
|
| 338 |
|
|
for (rel = relocs; rel < relend; rel++)
|
| 339 |
|
|
{
|
| 340 |
|
|
reloc_howto_type *howto;
|
| 341 |
|
|
unsigned long r_symndx;
|
| 342 |
|
|
Elf_Internal_Sym *sym;
|
| 343 |
|
|
asection *sec;
|
| 344 |
|
|
struct elf_link_hash_entry *h;
|
| 345 |
|
|
bfd_vma relocation;
|
| 346 |
|
|
bfd_reloc_status_type r;
|
| 347 |
|
|
const char *name = NULL;
|
| 348 |
|
|
int r_type;
|
| 349 |
|
|
|
| 350 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 351 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 352 |
|
|
|
| 353 |
|
|
if (r_type == R_OPENRISC_GNU_VTINHERIT
|
| 354 |
|
|
|| r_type == R_OPENRISC_GNU_VTENTRY)
|
| 355 |
|
|
continue;
|
| 356 |
|
|
|
| 357 |
|
|
if (info->relocateable)
|
| 358 |
|
|
{
|
| 359 |
|
|
/* This is a relocateable link. We don't have to change
|
| 360 |
|
|
anything, unless the reloc is against a section symbol,
|
| 361 |
|
|
in which case we have to adjust according to where the
|
| 362 |
|
|
section symbol winds up in the output section. */
|
| 363 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 364 |
|
|
{
|
| 365 |
|
|
sym = local_syms + r_symndx;
|
| 366 |
|
|
|
| 367 |
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
| 368 |
|
|
{
|
| 369 |
|
|
sec = local_sections[r_symndx];
|
| 370 |
|
|
rel->r_addend += sec->output_offset + sym->st_value;
|
| 371 |
|
|
}
|
| 372 |
|
|
}
|
| 373 |
|
|
continue;
|
| 374 |
|
|
}
|
| 375 |
|
|
|
| 376 |
|
|
if ((unsigned int) r_type >
|
| 377 |
|
|
(sizeof openrisc_elf_howto_table / sizeof (reloc_howto_type)))
|
| 378 |
|
|
abort ();
|
| 379 |
|
|
|
| 380 |
|
|
/* This is a final link. */
|
| 381 |
|
|
howto = openrisc_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
| 382 |
|
|
h = NULL;
|
| 383 |
|
|
sym = NULL;
|
| 384 |
|
|
sec = NULL;
|
| 385 |
|
|
|
| 386 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 387 |
|
|
{
|
| 388 |
|
|
sym = local_syms + r_symndx;
|
| 389 |
|
|
sec = local_sections[r_symndx];
|
| 390 |
|
|
relocation = (sec->output_section->vma
|
| 391 |
|
|
+ sec->output_offset + sym->st_value);
|
| 392 |
|
|
|
| 393 |
|
|
name = bfd_elf_string_from_elf_section
|
| 394 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
| 395 |
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
| 396 |
|
|
}
|
| 397 |
|
|
else
|
| 398 |
|
|
{
|
| 399 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 400 |
|
|
|
| 401 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 402 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 403 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
| 404 |
|
|
|
| 405 |
|
|
name = h->root.root.string;
|
| 406 |
|
|
|
| 407 |
|
|
if (h->root.type == bfd_link_hash_defined
|
| 408 |
|
|
|| h->root.type == bfd_link_hash_defweak)
|
| 409 |
|
|
{
|
| 410 |
|
|
sec = h->root.u.def.section;
|
| 411 |
|
|
relocation = (h->root.u.def.value
|
| 412 |
|
|
+ sec->output_section->vma + sec->output_offset);
|
| 413 |
|
|
}
|
| 414 |
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
| 415 |
|
|
{
|
| 416 |
|
|
relocation = 0;
|
| 417 |
|
|
}
|
| 418 |
|
|
else
|
| 419 |
|
|
{
|
| 420 |
|
|
if (!((*info->callbacks->undefined_symbol)
|
| 421 |
|
|
(info, h->root.root.string, input_bfd,
|
| 422 |
|
|
input_section, rel->r_offset, true)))
|
| 423 |
|
|
return false;
|
| 424 |
|
|
relocation = 0;
|
| 425 |
|
|
}
|
| 426 |
|
|
}
|
| 427 |
|
|
|
| 428 |
|
|
r = openrisc_final_link_relocate (howto, input_bfd, input_section,
|
| 429 |
|
|
contents, rel, relocation);
|
| 430 |
|
|
|
| 431 |
|
|
if (r != bfd_reloc_ok)
|
| 432 |
|
|
{
|
| 433 |
|
|
const char *msg = (const char *) NULL;
|
| 434 |
|
|
|
| 435 |
|
|
switch (r)
|
| 436 |
|
|
{
|
| 437 |
|
|
case bfd_reloc_overflow:
|
| 438 |
|
|
r = info->callbacks->reloc_overflow
|
| 439 |
|
|
(info, name, howto->name, (bfd_vma) 0,
|
| 440 |
|
|
input_bfd, input_section, rel->r_offset);
|
| 441 |
|
|
break;
|
| 442 |
|
|
|
| 443 |
|
|
case bfd_reloc_undefined:
|
| 444 |
|
|
r = info->callbacks->undefined_symbol
|
| 445 |
|
|
(info, name, input_bfd, input_section, rel->r_offset, true);
|
| 446 |
|
|
break;
|
| 447 |
|
|
|
| 448 |
|
|
case bfd_reloc_outofrange:
|
| 449 |
|
|
msg = _("internal error: out of range error");
|
| 450 |
|
|
break;
|
| 451 |
|
|
|
| 452 |
|
|
case bfd_reloc_notsupported:
|
| 453 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 454 |
|
|
break;
|
| 455 |
|
|
|
| 456 |
|
|
case bfd_reloc_dangerous:
|
| 457 |
|
|
msg = _("internal error: dangerous relocation");
|
| 458 |
|
|
break;
|
| 459 |
|
|
|
| 460 |
|
|
default:
|
| 461 |
|
|
msg = _("internal error: unknown error");
|
| 462 |
|
|
break;
|
| 463 |
|
|
}
|
| 464 |
|
|
|
| 465 |
|
|
if (msg)
|
| 466 |
|
|
r = info->callbacks->warning
|
| 467 |
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
| 468 |
|
|
|
| 469 |
|
|
if (!r)
|
| 470 |
|
|
return false;
|
| 471 |
|
|
}
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
return true;
|
| 475 |
|
|
}
|
| 476 |
|
|
|
| 477 |
|
|
/* Return the section that should be marked against GC for a given
|
| 478 |
|
|
relocation. */
|
| 479 |
|
|
|
| 480 |
|
|
static asection *
|
| 481 |
|
|
openrisc_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
| 482 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 483 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 484 |
|
|
Elf_Internal_Rela *rel ATTRIBUTE_UNUSED;
|
| 485 |
|
|
struct elf_link_hash_entry *h ATTRIBUTE_UNUSED;
|
| 486 |
|
|
Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
|
| 487 |
|
|
{
|
| 488 |
|
|
if (h != NULL)
|
| 489 |
|
|
{
|
| 490 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 491 |
|
|
{
|
| 492 |
|
|
case R_OPENRISC_GNU_VTINHERIT:
|
| 493 |
|
|
case R_OPENRISC_GNU_VTENTRY:
|
| 494 |
|
|
break;
|
| 495 |
|
|
|
| 496 |
|
|
default:
|
| 497 |
|
|
switch (h->root.type)
|
| 498 |
|
|
{
|
| 499 |
|
|
case bfd_link_hash_defined:
|
| 500 |
|
|
case bfd_link_hash_defweak:
|
| 501 |
|
|
return h->root.u.def.section;
|
| 502 |
|
|
|
| 503 |
|
|
case bfd_link_hash_common:
|
| 504 |
|
|
return h->root.u.c.p->section;
|
| 505 |
|
|
|
| 506 |
|
|
default:
|
| 507 |
|
|
break;
|
| 508 |
|
|
}
|
| 509 |
|
|
}
|
| 510 |
|
|
}
|
| 511 |
|
|
else
|
| 512 |
|
|
{
|
| 513 |
|
|
if (!(elf_bad_symtab (abfd)
|
| 514 |
|
|
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
| 515 |
|
|
&& !((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
| 516 |
|
|
&& sym->st_shndx != SHN_COMMON))
|
| 517 |
|
|
{
|
| 518 |
|
|
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
| 519 |
|
|
}
|
| 520 |
|
|
}
|
| 521 |
|
|
|
| 522 |
|
|
return NULL;
|
| 523 |
|
|
}
|
| 524 |
|
|
|
| 525 |
|
|
/* Update the got entry reference counts for the section being removed. */
|
| 526 |
|
|
|
| 527 |
|
|
static boolean
|
| 528 |
|
|
openrisc_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
| 529 |
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
| 530 |
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
| 531 |
|
|
asection *sec ATTRIBUTE_UNUSED;
|
| 532 |
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
|
| 533 |
|
|
{
|
| 534 |
|
|
return true;
|
| 535 |
|
|
}
|
| 536 |
|
|
|
| 537 |
|
|
/* Look through the relocs for a section during the first phase.
|
| 538 |
|
|
Since we don't do .gots or .plts, we just need to consider the
|
| 539 |
|
|
virtual table relocs for gc. */
|
| 540 |
|
|
|
| 541 |
|
|
static boolean
|
| 542 |
|
|
openrisc_elf_check_relocs (abfd, info, sec, relocs)
|
| 543 |
|
|
bfd *abfd;
|
| 544 |
|
|
struct bfd_link_info *info;
|
| 545 |
|
|
asection *sec;
|
| 546 |
|
|
const Elf_Internal_Rela *relocs;
|
| 547 |
|
|
{
|
| 548 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 549 |
|
|
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
| 550 |
|
|
const Elf_Internal_Rela *rel;
|
| 551 |
|
|
const Elf_Internal_Rela *rel_end;
|
| 552 |
|
|
|
| 553 |
|
|
if (info->relocateable)
|
| 554 |
|
|
return true;
|
| 555 |
|
|
|
| 556 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 557 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 558 |
|
|
sym_hashes_end =
|
| 559 |
|
|
sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
| 560 |
|
|
if (!elf_bad_symtab (abfd))
|
| 561 |
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
| 562 |
|
|
|
| 563 |
|
|
rel_end = relocs + sec->reloc_count;
|
| 564 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
| 565 |
|
|
{
|
| 566 |
|
|
struct elf_link_hash_entry *h;
|
| 567 |
|
|
unsigned long r_symndx;
|
| 568 |
|
|
|
| 569 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 570 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 571 |
|
|
h = NULL;
|
| 572 |
|
|
else
|
| 573 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 574 |
|
|
|
| 575 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 576 |
|
|
{
|
| 577 |
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
| 578 |
|
|
Reconstruct it for later use during GC. */
|
| 579 |
|
|
case R_OPENRISC_GNU_VTINHERIT:
|
| 580 |
|
|
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
| 581 |
|
|
return false;
|
| 582 |
|
|
break;
|
| 583 |
|
|
|
| 584 |
|
|
/* This relocation describes which C++ vtable entries are actually
|
| 585 |
|
|
used. Record for later use during GC. */
|
| 586 |
|
|
case R_OPENRISC_GNU_VTENTRY:
|
| 587 |
|
|
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
| 588 |
|
|
return false;
|
| 589 |
|
|
break;
|
| 590 |
|
|
}
|
| 591 |
|
|
}
|
| 592 |
|
|
|
| 593 |
|
|
return true;
|
| 594 |
|
|
}
|
| 595 |
|
|
|
| 596 |
|
|
/* Set the right machine number. */
|
| 597 |
|
|
|
| 598 |
|
|
static boolean
|
| 599 |
|
|
openrisc_elf_object_p (abfd)
|
| 600 |
|
|
bfd *abfd;
|
| 601 |
|
|
{
|
| 602 |
|
|
switch (elf_elfheader (abfd)->e_flags & 0xf)
|
| 603 |
|
|
{
|
| 604 |
|
|
default:
|
| 605 |
|
|
(void) bfd_default_set_arch_mach (abfd, bfd_arch_openrisc, 0);
|
| 606 |
|
|
break;
|
| 607 |
|
|
}
|
| 608 |
|
|
return true;
|
| 609 |
|
|
}
|
| 610 |
|
|
|
| 611 |
|
|
/* Store the machine number in the flags field. */
|
| 612 |
|
|
|
| 613 |
|
|
static void
|
| 614 |
|
|
openrisc_elf_final_write_processing (abfd, linker)
|
| 615 |
|
|
bfd *abfd;
|
| 616 |
|
|
boolean linker ATTRIBUTE_UNUSED;
|
| 617 |
|
|
{
|
| 618 |
|
|
unsigned long val;
|
| 619 |
|
|
|
| 620 |
|
|
switch (bfd_get_mach (abfd))
|
| 621 |
|
|
{
|
| 622 |
|
|
default:
|
| 623 |
|
|
val = 0;
|
| 624 |
|
|
break;
|
| 625 |
|
|
}
|
| 626 |
|
|
|
| 627 |
|
|
elf_elfheader (abfd)->e_flags &= ~0xf;
|
| 628 |
|
|
elf_elfheader (abfd)->e_flags |= val;
|
| 629 |
|
|
}
|
| 630 |
|
|
|
| 631 |
|
|
|
| 632 |
|
|
#define ELF_ARCH bfd_arch_openrisc
|
| 633 |
|
|
#define ELF_MACHINE_CODE EM_OPENRISC
|
| 634 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 635 |
|
|
|
| 636 |
|
|
#define TARGET_BIG_SYM bfd_elf32_openrisc_vec
|
| 637 |
|
|
#define TARGET_BIG_NAME "elf32-openrisc"
|
| 638 |
|
|
|
| 639 |
|
|
#define elf_info_to_howto_rel NULL
|
| 640 |
|
|
#define elf_info_to_howto openrisc_info_to_howto_rela
|
| 641 |
|
|
#define elf_backend_relocate_section openrisc_elf_relocate_section
|
| 642 |
|
|
#define elf_backend_gc_mark_hook openrisc_elf_gc_mark_hook
|
| 643 |
|
|
#define elf_backend_gc_sweep_hook openrisc_elf_gc_sweep_hook
|
| 644 |
|
|
#define elf_backend_check_relocs openrisc_elf_check_relocs
|
| 645 |
|
|
|
| 646 |
|
|
#define elf_backend_can_gc_sections 1
|
| 647 |
|
|
|
| 648 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup openrisc_reloc_type_lookup
|
| 649 |
|
|
|
| 650 |
|
|
#define elf_backend_object_p openrisc_elf_object_p
|
| 651 |
|
|
#define elf_backend_final_write_processing openrisc_elf_final_write_processing
|
| 652 |
|
|
|
| 653 |
|
|
#include "elf32-target.h"
|
