765 lines
24 KiB
C
765 lines
24 KiB
C
/* Motorola MCore specific support for 32-bit ELF
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Copyright 1994, 1995, 1999 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 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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/* This file is based on a preliminary RCE ELF ABI. The
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information may not match the final RCE ELF ABI. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/mcore.h"
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#include <assert.h>
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#define USE_RELA /* Only USE_REL is actually significant, but this is
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here are a reminder... */
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static void mcore_elf_howto_init
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PARAMS ((void));
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static reloc_howto_type * mcore_elf_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void mcore_elf_info_to_howto
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static boolean mcore_elf_set_private_flags
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PARAMS ((bfd *, flagword));
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static boolean mcore_elf_copy_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean mcore_elf_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static bfd_reloc_status_type mcore_elf_unsupported_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static boolean mcore_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 reloc_howto_type * mcore_elf_howto_table [(int) R_MCORE_max];
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static reloc_howto_type mcore_elf_howto_raw[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_MCORE_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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NULL, /* special_function */
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"R_MCORE_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 standard 32 bit relocation. */
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HOWTO (R_MCORE_ADDR32, /* 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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"ADDR32", /* name *//* For compatability with coff/pe port. */
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false, /* partial_inplace */
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0x0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 8 bits + 2 zero bits; jmpi/jsri/lrw instructions.
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Should not appear in object files. */
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HOWTO (R_MCORE_PCRELIMM8BY4, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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mcore_elf_unsupported_reloc, /* special_function */
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"R_MCORE_PCRELIMM8BY4",/* 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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true), /* pcrel_offset */
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/* bsr/bt/bf/br instructions; 11 bits + 1 zero bit
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Span 2k instructions == 4k bytes.
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Only useful pieces at the relocated address are the opcode (5 bits) */
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HOWTO (R_MCORE_PCRELIMM11BY2,/* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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11, /* 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_MCORE_PCRELIMM11BY2",/* name */
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false, /* partial_inplace */
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0x0, /* src_mask */
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0x7ff, /* dst_mask */
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true), /* pcrel_offset */
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/* 4 bits + 1 zero bit; 'loopt' instruction only; unsupported. */
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HOWTO (R_MCORE_PCRELIMM4BY2, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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4, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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mcore_elf_unsupported_reloc,/* special_function */
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"R_MCORE_PCRELIMM4BY2",/* 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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true), /* pcrel_offset */
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/* 32-bit pc-relative. Eventually this will help support PIC code. */
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HOWTO (R_MCORE_PCREL32, /* 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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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MCORE_PCREL32", /* name */
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false, /* partial_inplace */
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0x0, /* src_mask */
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0xffffffff, /* dst_mask */
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true), /* pcrel_offset */
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/* Like PCRELIMM11BY2, this relocation indicates that there is a
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'jsri' at the specified address. There is a separate relocation
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entry for the literal pool entry that it references, but we
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might be able to change the jsri to a bsr if the target turns out
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to be close enough [even though we won't reclaim the literal pool
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entry, we'll get some runtime efficiency back]. Note that this
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is a relocation that we are allowed to safely ignore. */
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HOWTO (R_MCORE_PCRELJSR_IMM11BY2,/* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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11, /* 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_MCORE_PCRELJSR_IMM11BY2", /* name */
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false, /* partial_inplace */
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0x0, /* src_mask */
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0x7ff, /* dst_mask */
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true), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_MCORE_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_MCORE_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_MCORE_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_MCORE_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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HOWTO (R_MCORE_RELATIVE, /* 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_signed, /* complain_on_overflow */
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NULL, /* special_function */
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"R_MCORE_RELATIVE", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false) /* pcrel_offset */
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};
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#ifndef NUM_ELEM
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#define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
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#endif
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/* Initialize the mcore_elf_howto_table, so that linear accesses can be done. */
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static void
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mcore_elf_howto_init ()
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{
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unsigned int i;
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for (i = NUM_ELEM (mcore_elf_howto_raw); i--;)
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{
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unsigned int type;
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type = mcore_elf_howto_raw[i].type;
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BFD_ASSERT (type < NUM_ELEM (mcore_elf_howto_table));
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mcore_elf_howto_table [type] = & mcore_elf_howto_raw [i];
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}
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}
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static reloc_howto_type *
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mcore_elf_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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enum elf_mcore_reloc_type mcore_reloc = R_MCORE_NONE;
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switch (code)
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{
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case BFD_RELOC_NONE: mcore_reloc = R_MCORE_NONE; break;
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case BFD_RELOC_32: mcore_reloc = R_MCORE_ADDR32; break;
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case BFD_RELOC_MCORE_PCREL_IMM8BY4: mcore_reloc = R_MCORE_PCRELIMM8BY4; break;
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case BFD_RELOC_MCORE_PCREL_IMM11BY2: mcore_reloc = R_MCORE_PCRELIMM11BY2; break;
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case BFD_RELOC_MCORE_PCREL_IMM4BY2: mcore_reloc = R_MCORE_PCRELIMM4BY2; break;
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case BFD_RELOC_32_PCREL: mcore_reloc = R_MCORE_PCREL32; break;
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case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2: mcore_reloc = R_MCORE_PCRELJSR_IMM11BY2; break;
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case BFD_RELOC_VTABLE_INHERIT: mcore_reloc = R_MCORE_GNU_VTINHERIT; break;
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case BFD_RELOC_VTABLE_ENTRY: mcore_reloc = R_MCORE_GNU_VTENTRY; break;
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case BFD_RELOC_RVA: mcore_reloc = R_MCORE_RELATIVE; break;
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default:
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return (reloc_howto_type *)NULL;
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}
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if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */
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mcore_elf_howto_init ();
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return mcore_elf_howto_table [(int) mcore_reloc];
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};
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/* Set the howto pointer for a RCE ELF reloc. */
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static void
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mcore_elf_info_to_howto (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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if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */
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mcore_elf_howto_init ();
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BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max);
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cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
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}
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/* Function to set whether a module needs the -mrelocatable bit set. */
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static boolean
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mcore_elf_set_private_flags (abfd, flags)
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bfd * abfd;
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flagword flags;
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{
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BFD_ASSERT (! elf_flags_init (abfd)
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|| elf_elfheader (abfd)->e_flags == flags);
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elf_elfheader (abfd)->e_flags = flags;
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elf_flags_init (abfd) = true;
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return true;
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}
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/* Copy backend specific data from one object module to another. */
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static boolean
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mcore_elf_copy_private_bfd_data (ibfd, obfd)
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bfd * ibfd;
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bfd * obfd;
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{
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if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
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|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
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return true;
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BFD_ASSERT (! elf_flags_init (obfd)
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|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
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elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
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elf_flags_init (obfd) = true;
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return true;
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}
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/* Merge backend specific data from an object file to the output
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object file when linking. */
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static boolean
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mcore_elf_merge_private_bfd_data (ibfd, obfd)
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bfd * ibfd;
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bfd * obfd;
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{
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flagword old_flags;
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flagword new_flags;
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/* Check if we have the same endianess */
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if ( ibfd->xvec->byteorder != obfd->xvec->byteorder
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&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
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{
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(*_bfd_error_handler)
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(_("%s: compiled for a %s endian system and target is %s endian.\n"),
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bfd_get_filename (ibfd),
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bfd_big_endian (ibfd) ? "big" : "little",
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bfd_big_endian (obfd) ? "big" : "little");
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bfd_set_error (bfd_error_wrong_format);
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return false;
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}
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if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
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|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
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return true;
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new_flags = elf_elfheader (ibfd)->e_flags;
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old_flags = elf_elfheader (obfd)->e_flags;
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if (! elf_flags_init (obfd)) /* First call, no flags set */
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{
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elf_flags_init (obfd) = true;
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elf_elfheader (obfd)->e_flags = new_flags;
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}
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else if (new_flags == old_flags) /* Compatible flags are ok */
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;
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else
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{
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/* FIXME */
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}
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return true;
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}
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/* Don't pretend we can deal with unsupported relocs. */
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/*ARGSUSED*/
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static bfd_reloc_status_type
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mcore_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, error_message)
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bfd * abfd;
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arelent * reloc_entry;
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asymbol * symbol ATTRIBUTE_UNUSED;
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PTR data ATTRIBUTE_UNUSED;
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asection * input_section ATTRIBUTE_UNUSED;
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bfd * output_bfd ATTRIBUTE_UNUSED;
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char ** error_message ATTRIBUTE_UNUSED;
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{
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BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0);
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_bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"),
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bfd_get_filename (abfd),
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reloc_entry->howto->name,
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reloc_entry->howto->type);
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return bfd_reloc_notsupported;
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}
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/* The RELOCATE_SECTION function is called by the 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 adjust the section contents as
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necessary, and (if using Rela relocs and generating a
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relocateable output file) adjusting the reloc addend as
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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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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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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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When generating relocateable output, this function must handle
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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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section, which means that the addend must be adjusted
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accordingly. */
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static boolean
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mcore_elf_relocate_section (output_bfd, info, input_bfd, input_section,
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contents, relocs, local_syms, local_sections)
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bfd * output_bfd ATTRIBUTE_UNUSED;
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struct bfd_link_info * info;
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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 * relocs;
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Elf_Internal_Sym * local_syms;
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asection ** local_sections;
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{
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Elf_Internal_Shdr * symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
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struct elf_link_hash_entry ** sym_hashes = elf_sym_hashes (input_bfd);
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Elf_Internal_Rela * rel = relocs;
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Elf_Internal_Rela * relend = relocs + input_section->reloc_count;
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boolean ret = true;
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#ifdef DEBUG
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fprintf (stderr,
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"mcore_elf_relocate_section called for %s section %s, %ld relocations%s\n",
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bfd_get_filename (input_bfd),
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bfd_section_name(input_bfd, input_section),
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(long) input_section->reloc_count,
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(info->relocateable) ? " (relocatable)" : "");
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#endif
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if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4]) /* Initialize howto table if needed */
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mcore_elf_howto_init ();
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for (; rel < relend; rel++)
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{
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enum elf_mcore_reloc_type r_type = (enum elf_mcore_reloc_type) ELF32_R_TYPE (rel->r_info);
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bfd_vma offset = rel->r_offset;
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bfd_vma addend = rel->r_addend;
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bfd_reloc_status_type r = bfd_reloc_other;
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asection * sec = (asection *) 0;
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reloc_howto_type * howto;
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bfd_vma relocation;
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||
Elf_Internal_Sym * sym = (Elf_Internal_Sym *) 0;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry * h = (struct elf_link_hash_entry *) 0;
|
||
unsigned short oldinst = 0;
|
||
|
||
/* Unknown relocation handling */
|
||
if ((unsigned) r_type >= (unsigned) R_MCORE_max
|
||
|| ! mcore_elf_howto_table [(int)r_type])
|
||
{
|
||
_bfd_error_handler (_("%s: Unknown relocation type %d\n"),
|
||
bfd_get_filename (input_bfd),
|
||
(int) r_type);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
howto = mcore_elf_howto_table [(int) r_type];
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (info->relocateable)
|
||
{
|
||
/* This is a relocateable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
|
||
if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
addend = rel->r_addend += sec->output_offset + sym->st_value;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name, (int) r_type, r_symndx, (long) offset, (long) addend);
|
||
#endif
|
||
continue;
|
||
}
|
||
|
||
/* This is a final link. */
|
||
|
||
/* Complain about known relocation that are not yet supported */
|
||
if (howto->special_function == mcore_elf_unsupported_reloc)
|
||
{
|
||
_bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"),
|
||
bfd_get_filename (input_bfd),
|
||
howto->name,
|
||
(int)r_type);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections [r_symndx];
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
|
||
if ( h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
relocation = 0;
|
||
else if (info->shared)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset, true)))
|
||
return false;
|
||
|
||
ret = false;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case R_MCORE_PCRELJSR_IMM11BY2:
|
||
oldinst = bfd_get_16 (input_bfd, contents + offset);
|
||
#define MCORE_INST_BSR 0xF800
|
||
bfd_put_16 (input_bfd, MCORE_INST_BSR, contents + offset);
|
||
break;
|
||
}
|
||
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name, r_type, r_symndx, (long) offset, (long) addend);
|
||
#endif
|
||
|
||
r = _bfd_final_link_relocate
|
||
(howto, input_bfd, input_section, contents, offset, relocation, addend);
|
||
|
||
if (r != bfd_reloc_ok && r_type == R_MCORE_PCRELJSR_IMM11BY2)
|
||
{
|
||
/* Wasn't ok, back it out and give up. */
|
||
bfd_put_16 (input_bfd, oldinst, contents + offset);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
ret = false;
|
||
|
||
switch (r)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char * name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
||
|
||
if (name == NULL)
|
||
break;
|
||
|
||
if (* name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0, input_bfd, input_section,
|
||
offset);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\n");
|
||
#endif
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
mcore_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
||
bfd * abfd;
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela * rel;
|
||
struct elf_link_hash_entry * h;
|
||
Elf_Internal_Sym * sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_MCORE_GNU_VTINHERIT:
|
||
case R_MCORE_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (!(elf_bad_symtab (abfd)
|
||
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
||
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
||
&& sym->st_shndx != SHN_COMMON))
|
||
{
|
||
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static boolean
|
||
mcore_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED;
|
||
asection * sec ATTRIBUTE_UNUSED;
|
||
const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
|
||
{
|
||
return true;
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase.
|
||
Since we don't do .gots or .plts, we just need to consider the
|
||
virtual table relocs for gc. */
|
||
|
||
static boolean
|
||
mcore_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd * abfd;
|
||
struct bfd_link_info * info;
|
||
asection * sec;
|
||
const Elf_Internal_Rela * relocs;
|
||
{
|
||
Elf_Internal_Shdr * symtab_hdr;
|
||
struct elf_link_hash_entry ** sym_hashes;
|
||
struct elf_link_hash_entry ** sym_hashes_end;
|
||
const Elf_Internal_Rela * rel;
|
||
const Elf_Internal_Rela * rel_end;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
||
if (!elf_bad_symtab (abfd))
|
||
sym_hashes_end -= symtab_hdr->sh_info;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
struct elf_link_hash_entry * h;
|
||
unsigned long r_symndx;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_MCORE_GNU_VTINHERIT:
|
||
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return false;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_MCORE_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return false;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_mcore_big_vec
|
||
#define TARGET_BIG_NAME "elf32-mcore-big"
|
||
#define TARGET_LITTLE_SYM bfd_elf32_mcore_little_vec
|
||
#define TARGET_LITTLE_NAME "elf32-mcore-little"
|
||
|
||
#define ELF_ARCH bfd_arch_mcore
|
||
#define ELF_MACHINE_CODE EM_MCORE
|
||
#define ELF_MAXPAGESIZE 0x1000 /* 4k, if we ever have 'em */
|
||
#define elf_info_to_howto mcore_elf_info_to_howto
|
||
#define elf_info_to_howto_rel NULL
|
||
|
||
|
||
#define bfd_elf32_bfd_copy_private_bfd_data mcore_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data mcore_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags mcore_elf_set_private_flags
|
||
#define bfd_elf32_bfd_reloc_type_lookup mcore_elf_reloc_type_lookup
|
||
#define elf_backend_relocate_section mcore_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook mcore_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook mcore_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs mcore_elf_check_relocs
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
|
||
#include "elf32-target.h"
|