919 lines
26 KiB
C
919 lines
26 KiB
C
/* IQ2000-specific support for 32-bit ELF.
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Copyright (C) 2003-2022 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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/iq2000.h"
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#include "libiberty.h"
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/* Forward declarations. */
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static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static reloc_howto_type iq2000_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_IQ2000_NONE, /* type */
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0, /* rightshift */
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3, /* 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_generic_reloc, /* special_function */
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"R_IQ2000_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 16 bit absolute relocation. */
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HOWTO (R_IQ2000_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_IQ2000_16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_IQ2000_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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31, /* 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_IQ2000_32", /* name */
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false, /* partial_inplace */
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0x00000000, /* src_mask */
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0x7fffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 26 bit branch address. */
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HOWTO (R_IQ2000_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_dont, /* complain_on_overflow */
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/* This needs complex overflow
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detection, because the upper four
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bits must match the PC. */
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bfd_elf_generic_reloc, /* special_function */
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"R_IQ2000_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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/* 16 bit PC relative reference. */
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HOWTO (R_IQ2000_PC16, /* type */
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2, /* rightshift */
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2, /* 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_IQ2000_PC16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0xffff, /* dst_mask */
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true), /* pcrel_offset */
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/* high 16 bits of symbol value. */
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HOWTO (R_IQ2000_HI16, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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15, /* 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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iq2000_elf_howto_hi16_reloc, /* special_function */
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"R_IQ2000_HI16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0x7fff, /* dst_mask */
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false), /* pcrel_offset */
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/* Low 16 bits of symbol value. */
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HOWTO (R_IQ2000_LO16, /* type */
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0, /* rightshift */
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2, /* 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_IQ2000_LO16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 16-bit jump offset. */
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HOWTO (R_IQ2000_OFFSET_16, /* type */
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2, /* rightshift */
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2, /* 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_IQ2000_OFFSET_16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 21-bit jump offset. */
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HOWTO (R_IQ2000_OFFSET_21, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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21, /* 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_IQ2000_OFFSET_21", /* name */
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false, /* partial_inplace */
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0x000000, /* src_mask */
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0x1fffff, /* dst_mask */
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false), /* pcrel_offset */
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/* unsigned high 16 bits of value. */
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HOWTO (R_IQ2000_OFFSET_21, /* type */
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16, /* rightshift */
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2, /* 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_IQ2000_UHI16", /* name */
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false, /* partial_inplace */
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0x0000, /* src_mask */
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0x7fff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit absolute debug relocation. */
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HOWTO (R_IQ2000_32_DEBUG, /* 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_IQ2000_32", /* name */
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false, /* 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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};
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/* GNU extension to record C++ vtable hierarchy. */
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static reloc_howto_type iq2000_elf_vtinherit_howto =
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HOWTO (R_IQ2000_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_IQ2000_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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static reloc_howto_type iq2000_elf_vtentry_howto =
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HOWTO (R_IQ2000_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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NULL, /* special_function */
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"R_IQ2000_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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static bfd_reloc_status_type
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iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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bfd_reloc_status_type ret;
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bfd_vma relocation;
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/* If we're relocating and this an external symbol,
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we don't want to change anything. */
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if (output_bfd != (bfd *) NULL
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&& (symbol->flags & BSF_SECTION_SYM) == 0
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&& reloc_entry->addend == 0)
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{
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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if (bfd_is_com_section (symbol->section))
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relocation = 0;
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else
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relocation = symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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relocation += reloc_entry->addend;
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/* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
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if (relocation & 0x8000)
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reloc_entry->addend += 0x10000;
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/* Now do the reloc in the usual way. */
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ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message);
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/* Put it back the way it was. */
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if (relocation & 0x8000)
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reloc_entry->addend -= 0x10000;
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return ret;
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}
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static bfd_reloc_status_type
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iq2000_elf_relocate_hi16 (bfd *input_bfd,
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Elf_Internal_Rela *relhi,
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bfd_byte *contents,
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bfd_vma value)
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{
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bfd_vma insn;
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insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
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value += relhi->r_addend;
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value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
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/* If top-bit of %lo value is on, this means that %lo will
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sign-propagate and so we compensate by adding 1 to %hi value. */
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if (value & 0x8000)
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value += 0x10000;
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value >>= 16;
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insn = ((insn & ~0xFFFF) | value);
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bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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iq2000_elf_relocate_offset16 (bfd *input_bfd,
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Elf_Internal_Rela *rel,
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bfd_byte *contents,
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bfd_vma value,
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bfd_vma location)
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{
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bfd_vma insn;
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bfd_vma jtarget;
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insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
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value += rel->r_addend;
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if (value & 3)
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return bfd_reloc_dangerous;
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jtarget = (value & 0x3fffc) | (location & 0xf0000000L);
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if (jtarget != value)
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return bfd_reloc_overflow;
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insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF);
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bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
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return bfd_reloc_ok;
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}
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/* Map BFD reloc types to IQ2000 ELF reloc types. */
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static reloc_howto_type *
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iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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/* Note that the iq2000_elf_howto_table is indxed by the R_
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constants. Thus, the order that the howto records appear in the
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table *must* match the order of the relocation types defined in
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include/elf/iq2000.h. */
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switch (code)
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{
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case BFD_RELOC_NONE:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
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case BFD_RELOC_16:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
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case BFD_RELOC_32:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
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case BFD_RELOC_MIPS_JMP:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
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case BFD_RELOC_IQ2000_OFFSET_16:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
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case BFD_RELOC_IQ2000_OFFSET_21:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
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case BFD_RELOC_16_PCREL_S2:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
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case BFD_RELOC_HI16:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
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case BFD_RELOC_IQ2000_UHI16:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
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case BFD_RELOC_LO16:
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return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
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case BFD_RELOC_VTABLE_INHERIT:
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return &iq2000_elf_vtinherit_howto;
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case BFD_RELOC_VTABLE_ENTRY:
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return &iq2000_elf_vtentry_howto;
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default:
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/* Pacify gcc -Wall. */
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return NULL;
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||
}
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||
return NULL;
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||
}
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static reloc_howto_type *
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iq2000_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 (iq2000_elf_howto_table)
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/ sizeof (iq2000_elf_howto_table[0]));
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i++)
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if (iq2000_elf_howto_table[i].name != NULL
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||
&& strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0)
|
||
return &iq2000_elf_howto_table[i];
|
||
|
||
if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0)
|
||
return &iq2000_elf_vtinherit_howto;
|
||
if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0)
|
||
return &iq2000_elf_vtentry_howto;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Perform a single relocation. By default we use the standard BFD
|
||
routines. */
|
||
|
||
static bfd_reloc_status_type
|
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iq2000_final_link_relocate (reloc_howto_type * howto,
|
||
bfd * input_bfd,
|
||
asection * input_section,
|
||
bfd_byte * contents,
|
||
Elf_Internal_Rela * rel,
|
||
bfd_vma relocation)
|
||
{
|
||
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
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contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
}
|
||
|
||
/* Set the howto pointer for a IQ2000 ELF reloc. */
|
||
|
||
static bool
|
||
iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
|
||
arelent * cache_ptr,
|
||
Elf_Internal_Rela * dst)
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_IQ2000_GNU_VTINHERIT:
|
||
cache_ptr->howto = & iq2000_elf_vtinherit_howto;
|
||
break;
|
||
|
||
case R_IQ2000_GNU_VTENTRY:
|
||
cache_ptr->howto = & iq2000_elf_vtentry_howto;
|
||
break;
|
||
|
||
default:
|
||
if (r_type >= ARRAY_SIZE (iq2000_elf_howto_table))
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
||
abfd, r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
cache_ptr->howto = & iq2000_elf_howto_table [r_type];
|
||
break;
|
||
}
|
||
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 bool
|
||
iq2000_elf_check_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;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
bool changed = false;
|
||
|
||
if (bfd_link_relocatable (info))
|
||
return true;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
|
||
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];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes the C++ object vtable
|
||
hierarchy. Reconstruct it for later use during GC. */
|
||
case R_IQ2000_GNU_VTINHERIT:
|
||
if (!bfd_elf_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_IQ2000_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return false;
|
||
break;
|
||
|
||
case R_IQ2000_32:
|
||
/* For debug section, change to special harvard-aware relocations. */
|
||
if (startswith (sec->name, ".debug")
|
||
|| startswith (sec->name, ".stab")
|
||
|| startswith (sec->name, ".eh_frame"))
|
||
{
|
||
((Elf_Internal_Rela *) rel)->r_info
|
||
= ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
|
||
changed = true;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (changed)
|
||
/* Note that we've changed relocs, otherwise if !info->keep_memory
|
||
we'll free the relocs and lose our changes. */
|
||
elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Relocate a IQ2000 ELF section.
|
||
There is some attempt to make this function usable for many architectures,
|
||
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
||
if only to serve as a learning tool.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjusting the section contents as
|
||
necessary, and (if using Rela relocs and generating a relocatable
|
||
output file) adjusting the reloc addend as necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocatable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static int
|
||
iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info * info,
|
||
bfd * input_bfd,
|
||
asection * input_section,
|
||
bfd_byte * contents,
|
||
Elf_Internal_Rela * relocs,
|
||
Elf_Internal_Sym * local_syms,
|
||
asection ** local_sections)
|
||
{
|
||
Elf_Internal_Shdr * symtab_hdr;
|
||
struct elf_link_hash_entry ** sym_hashes;
|
||
Elf_Internal_Rela * rel;
|
||
Elf_Internal_Rela * relend;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
for (rel = relocs; rel < relend; rel ++)
|
||
{
|
||
reloc_howto_type * howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym * sym;
|
||
asection * sec;
|
||
struct elf_link_hash_entry * h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
const char * name = NULL;
|
||
int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if ( r_type == R_IQ2000_GNU_VTINHERIT
|
||
|| r_type == R_IQ2000_GNU_VTENTRY)
|
||
continue;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
asection *osec;
|
||
|
||
sym = local_syms + r_symndx;
|
||
osec = sec = local_sections [r_symndx];
|
||
if ((sec->flags & SEC_MERGE)
|
||
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
/* This relocation is relative to a section symbol that is
|
||
going to be merged. Change it so that it is relative
|
||
to the merged section symbol. */
|
||
rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
|
||
rel->r_addend);
|
||
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
|
||
name = bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
||
name = name == NULL ? bfd_section_name (osec) : name;
|
||
}
|
||
else
|
||
{
|
||
bool unresolved_reloc;
|
||
bool warned, ignored;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned, ignored);
|
||
|
||
name = h->root.root.string;
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, 1, relend, howto, 0, contents);
|
||
|
||
if (bfd_link_relocatable (info))
|
||
continue;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_IQ2000_HI16:
|
||
r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
|
||
break;
|
||
|
||
case R_IQ2000_OFFSET_16:
|
||
r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
|
||
input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ rel->r_offset);
|
||
break;
|
||
|
||
case R_IQ2000_PC16:
|
||
rel->r_addend -= 4;
|
||
/* Fall through. */
|
||
|
||
default:
|
||
r = iq2000_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel, relocation);
|
||
break;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char * msg = (const char *) NULL;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
(*info->callbacks->undefined_symbol)
|
||
(info, name, input_bfd, input_section, rel->r_offset, true);
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
break;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
break;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
break;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
break;
|
||
}
|
||
|
||
if (msg)
|
||
(*info->callbacks->warning) (info, msg, name, input_bfd,
|
||
input_section, rel->r_offset);
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
iq2000_elf_gc_mark_hook (asection *sec,
|
||
struct bfd_link_info *info,
|
||
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_IQ2000_GNU_VTINHERIT:
|
||
case R_IQ2000_GNU_VTENTRY:
|
||
return NULL;
|
||
}
|
||
|
||
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
||
}
|
||
|
||
|
||
/* Return the MACH for an e_flags value. */
|
||
|
||
static int
|
||
elf32_iq2000_machine (bfd *abfd)
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
|
||
{
|
||
case EF_IQ2000_CPU_IQ10:
|
||
return bfd_mach_iq10;
|
||
|
||
case EF_IQ2000_CPU_IQ2000:
|
||
default:
|
||
return bfd_mach_iq2000;
|
||
}
|
||
}
|
||
|
||
|
||
/* Function to set the ELF flag bits. */
|
||
|
||
static bool
|
||
iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
|
||
{
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object
|
||
file to the output object file when linking. */
|
||
|
||
static bool
|
||
iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
|
||
{
|
||
bfd *obfd = info->output_bfd;
|
||
flagword old_flags, old_partial;
|
||
flagword new_flags, new_partial;
|
||
bool error = false;
|
||
char new_opt[80];
|
||
char old_opt[80];
|
||
|
||
new_opt[0] = old_opt[0] = '\0';
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (!elf_flags_init (obfd))
|
||
{
|
||
/* First call, no flags set. */
|
||
elf_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = new_flags;
|
||
}
|
||
|
||
else if (new_flags != old_flags)
|
||
{
|
||
/* Warn if different cpu is used, but allow a
|
||
specific cpu to override the generic cpu. */
|
||
new_partial = (new_flags & EF_IQ2000_CPU_MASK);
|
||
old_partial = (old_flags & EF_IQ2000_CPU_MASK);
|
||
|
||
if (new_partial != old_partial)
|
||
{
|
||
switch (new_partial)
|
||
{
|
||
case EF_IQ2000_CPU_IQ10:
|
||
strcat (new_opt, " -m10");
|
||
break;
|
||
|
||
default:
|
||
case EF_IQ2000_CPU_IQ2000:
|
||
strcat (new_opt, " -m2000");
|
||
break;
|
||
}
|
||
|
||
switch (old_partial)
|
||
{
|
||
case EF_IQ2000_CPU_IQ10:
|
||
strcat (old_opt, " -m10");
|
||
break;
|
||
|
||
default:
|
||
case EF_IQ2000_CPU_IQ2000:
|
||
strcat (old_opt, " -m2000");
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Print out any mismatches from above. */
|
||
if (new_opt[0])
|
||
{
|
||
error = true;
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: compiled with %s and linked with modules compiled with %s"),
|
||
ibfd, new_opt, old_opt);
|
||
}
|
||
|
||
new_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
||
old_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
||
|
||
/* Warn about any other mismatches. */
|
||
if (new_flags != old_flags)
|
||
{
|
||
error = true;
|
||
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"),
|
||
ibfd, new_flags, old_flags);
|
||
}
|
||
}
|
||
|
||
if (error)
|
||
bfd_set_error (bfd_error_bad_value);
|
||
|
||
return !error;
|
||
}
|
||
|
||
|
||
static bool
|
||
iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
flagword flags;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
/* Print normal ELF private data. */
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
flags = elf_elfheader (abfd)->e_flags;
|
||
fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
|
||
|
||
switch (flags & EF_IQ2000_CPU_MASK)
|
||
{
|
||
case EF_IQ2000_CPU_IQ10:
|
||
fprintf (file, " -m10");
|
||
break;
|
||
case EF_IQ2000_CPU_IQ2000:
|
||
fprintf (file, " -m2000");
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
fputc ('\n', file);
|
||
return true;
|
||
}
|
||
|
||
static
|
||
bool
|
||
iq2000_elf_object_p (bfd *abfd)
|
||
{
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
|
||
elf32_iq2000_machine (abfd));
|
||
return true;
|
||
}
|
||
|
||
|
||
#define ELF_ARCH bfd_arch_iq2000
|
||
#define ELF_MACHINE_CODE EM_IQ2000
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM iq2000_elf32_vec
|
||
#define TARGET_BIG_NAME "elf32-iq2000"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto iq2000_info_to_howto_rela
|
||
#define elf_backend_relocate_section iq2000_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
|
||
#define elf_backend_check_relocs iq2000_elf_check_relocs
|
||
#define elf_backend_object_p iq2000_elf_object_p
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
|
||
#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
|
||
#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
|
||
#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
|
||
|
||
#include "elf32-target.h"
|