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jeremybenn |
/* IQ2000-specific support for 32-bit ELF.
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225 |
jeremybenn |
Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
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24 |
jeremybenn |
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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/* 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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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_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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| 292 |
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insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
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| 294 |
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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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| 305 |
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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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| 309 |
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static bfd_reloc_status_type
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iq2000_elf_relocate_offset16 (bfd *input_bfd,
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| 311 |
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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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| 319 |
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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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| 328 |
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if (jtarget != value)
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return bfd_reloc_overflow;
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| 330 |
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|
|
insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF);
|
| 332 |
|
|
|
| 333 |
|
|
bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
|
| 334 |
|
|
return bfd_reloc_ok;
|
| 335 |
|
|
}
|
| 336 |
|
|
|
| 337 |
|
|
/* Map BFD reloc types to IQ2000 ELF reloc types. */
|
| 338 |
|
|
|
| 339 |
|
|
static reloc_howto_type *
|
| 340 |
|
|
iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
| 341 |
|
|
bfd_reloc_code_real_type code)
|
| 342 |
|
|
{
|
| 343 |
|
|
/* Note that the iq2000_elf_howto_table is indxed by the R_
|
| 344 |
|
|
constants. Thus, the order that the howto records appear in the
|
| 345 |
|
|
table *must* match the order of the relocation types defined in
|
| 346 |
|
|
include/elf/iq2000.h. */
|
| 347 |
|
|
|
| 348 |
|
|
switch (code)
|
| 349 |
|
|
{
|
| 350 |
|
|
case BFD_RELOC_NONE:
|
| 351 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
|
| 352 |
|
|
case BFD_RELOC_16:
|
| 353 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
|
| 354 |
|
|
case BFD_RELOC_32:
|
| 355 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
|
| 356 |
|
|
case BFD_RELOC_MIPS_JMP:
|
| 357 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
|
| 358 |
|
|
case BFD_RELOC_IQ2000_OFFSET_16:
|
| 359 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
|
| 360 |
|
|
case BFD_RELOC_IQ2000_OFFSET_21:
|
| 361 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
|
| 362 |
|
|
case BFD_RELOC_16_PCREL_S2:
|
| 363 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
|
| 364 |
|
|
case BFD_RELOC_HI16:
|
| 365 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
|
| 366 |
|
|
case BFD_RELOC_IQ2000_UHI16:
|
| 367 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
|
| 368 |
|
|
case BFD_RELOC_LO16:
|
| 369 |
|
|
return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
|
| 370 |
|
|
case BFD_RELOC_VTABLE_INHERIT:
|
| 371 |
|
|
return &iq2000_elf_vtinherit_howto;
|
| 372 |
|
|
case BFD_RELOC_VTABLE_ENTRY:
|
| 373 |
|
|
return &iq2000_elf_vtentry_howto;
|
| 374 |
|
|
default:
|
| 375 |
|
|
/* Pacify gcc -Wall. */
|
| 376 |
|
|
return NULL;
|
| 377 |
|
|
}
|
| 378 |
|
|
return NULL;
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
static reloc_howto_type *
|
| 382 |
|
|
iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
| 383 |
|
|
{
|
| 384 |
|
|
unsigned int i;
|
| 385 |
|
|
|
| 386 |
|
|
for (i = 0;
|
| 387 |
|
|
i < (sizeof (iq2000_elf_howto_table)
|
| 388 |
|
|
/ sizeof (iq2000_elf_howto_table[0]));
|
| 389 |
|
|
i++)
|
| 390 |
|
|
if (iq2000_elf_howto_table[i].name != NULL
|
| 391 |
|
|
&& strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0)
|
| 392 |
|
|
return &iq2000_elf_howto_table[i];
|
| 393 |
|
|
|
| 394 |
|
|
if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0)
|
| 395 |
|
|
return &iq2000_elf_vtinherit_howto;
|
| 396 |
|
|
if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0)
|
| 397 |
|
|
return &iq2000_elf_vtentry_howto;
|
| 398 |
|
|
|
| 399 |
|
|
return NULL;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
/* Perform a single relocation. By default we use the standard BFD
|
| 403 |
|
|
routines. */
|
| 404 |
|
|
|
| 405 |
|
|
static bfd_reloc_status_type
|
| 406 |
|
|
iq2000_final_link_relocate (reloc_howto_type * howto,
|
| 407 |
|
|
bfd * input_bfd,
|
| 408 |
|
|
asection * input_section,
|
| 409 |
|
|
bfd_byte * contents,
|
| 410 |
|
|
Elf_Internal_Rela * rel,
|
| 411 |
|
|
bfd_vma relocation)
|
| 412 |
|
|
{
|
| 413 |
|
|
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
| 414 |
|
|
contents, rel->r_offset,
|
| 415 |
|
|
relocation, rel->r_addend);
|
| 416 |
|
|
}
|
| 417 |
|
|
|
| 418 |
|
|
/* Set the howto pointer for a IQ2000 ELF reloc. */
|
| 419 |
|
|
|
| 420 |
|
|
static void
|
| 421 |
|
|
iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
|
| 422 |
|
|
arelent * cache_ptr,
|
| 423 |
|
|
Elf_Internal_Rela * dst)
|
| 424 |
|
|
{
|
| 425 |
|
|
unsigned int r_type;
|
| 426 |
|
|
|
| 427 |
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
| 428 |
|
|
switch (r_type)
|
| 429 |
|
|
{
|
| 430 |
|
|
case R_IQ2000_GNU_VTINHERIT:
|
| 431 |
|
|
cache_ptr->howto = & iq2000_elf_vtinherit_howto;
|
| 432 |
|
|
break;
|
| 433 |
|
|
|
| 434 |
|
|
case R_IQ2000_GNU_VTENTRY:
|
| 435 |
|
|
cache_ptr->howto = & iq2000_elf_vtentry_howto;
|
| 436 |
|
|
break;
|
| 437 |
|
|
|
| 438 |
|
|
default:
|
| 439 |
|
|
cache_ptr->howto = & iq2000_elf_howto_table [r_type];
|
| 440 |
|
|
break;
|
| 441 |
|
|
}
|
| 442 |
|
|
}
|
| 443 |
|
|
|
| 444 |
|
|
/* Look through the relocs for a section during the first phase.
|
| 445 |
|
|
Since we don't do .gots or .plts, we just need to consider the
|
| 446 |
|
|
virtual table relocs for gc. */
|
| 447 |
|
|
|
| 448 |
|
|
static bfd_boolean
|
| 449 |
|
|
iq2000_elf_check_relocs (bfd *abfd,
|
| 450 |
|
|
struct bfd_link_info *info,
|
| 451 |
|
|
asection *sec,
|
| 452 |
|
|
const Elf_Internal_Rela *relocs)
|
| 453 |
|
|
{
|
| 454 |
|
|
Elf_Internal_Shdr *symtab_hdr;
|
| 455 |
|
|
struct elf_link_hash_entry **sym_hashes;
|
| 456 |
|
|
const Elf_Internal_Rela *rel;
|
| 457 |
|
|
const Elf_Internal_Rela *rel_end;
|
| 458 |
|
|
bfd_boolean changed = FALSE;
|
| 459 |
|
|
|
| 460 |
|
|
if (info->relocatable)
|
| 461 |
|
|
return TRUE;
|
| 462 |
|
|
|
| 463 |
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
| 464 |
|
|
sym_hashes = elf_sym_hashes (abfd);
|
| 465 |
|
|
|
| 466 |
|
|
rel_end = relocs + sec->reloc_count;
|
| 467 |
|
|
for (rel = relocs; rel < rel_end; rel++)
|
| 468 |
|
|
{
|
| 469 |
|
|
struct elf_link_hash_entry *h;
|
| 470 |
|
|
unsigned long r_symndx;
|
| 471 |
|
|
|
| 472 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 473 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 474 |
|
|
h = NULL;
|
| 475 |
|
|
else
|
| 476 |
|
|
{
|
| 477 |
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
| 478 |
|
|
while (h->root.type == bfd_link_hash_indirect
|
| 479 |
|
|
|| h->root.type == bfd_link_hash_warning)
|
| 480 |
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
| 481 |
|
|
}
|
| 482 |
|
|
|
| 483 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 484 |
|
|
{
|
| 485 |
|
|
/* This relocation describes the C++ object vtable
|
| 486 |
|
|
hierarchy. Reconstruct it for later use during GC. */
|
| 487 |
|
|
case R_IQ2000_GNU_VTINHERIT:
|
| 488 |
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
| 489 |
|
|
return FALSE;
|
| 490 |
|
|
break;
|
| 491 |
|
|
|
| 492 |
|
|
/* This relocation describes which C++ vtable entries
|
| 493 |
|
|
are actually used. Record for later use during GC. */
|
| 494 |
|
|
case R_IQ2000_GNU_VTENTRY:
|
| 495 |
|
|
BFD_ASSERT (h != NULL);
|
| 496 |
|
|
if (h != NULL
|
| 497 |
|
|
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
| 498 |
|
|
return FALSE;
|
| 499 |
|
|
break;
|
| 500 |
|
|
|
| 501 |
|
|
case R_IQ2000_32:
|
| 502 |
|
|
/* For debug section, change to special harvard-aware relocations. */
|
| 503 |
|
|
if (CONST_STRNEQ (sec->name, ".debug")
|
| 504 |
|
|
|| CONST_STRNEQ (sec->name, ".stab")
|
| 505 |
|
|
|| CONST_STRNEQ (sec->name, ".eh_frame"))
|
| 506 |
|
|
{
|
| 507 |
|
|
((Elf_Internal_Rela *) rel)->r_info
|
| 508 |
|
|
= ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
|
| 509 |
|
|
changed = TRUE;
|
| 510 |
|
|
}
|
| 511 |
|
|
break;
|
| 512 |
|
|
}
|
| 513 |
|
|
}
|
| 514 |
|
|
|
| 515 |
|
|
if (changed)
|
| 516 |
|
|
/* Note that we've changed relocs, otherwise if !info->keep_memory
|
| 517 |
|
|
we'll free the relocs and lose our changes. */
|
| 518 |
|
|
elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
|
| 519 |
|
|
|
| 520 |
|
|
return TRUE;
|
| 521 |
|
|
}
|
| 522 |
|
|
|
| 523 |
|
|
|
| 524 |
|
|
/* Relocate a IQ2000 ELF section.
|
| 525 |
|
|
There is some attempt to make this function usable for many architectures,
|
| 526 |
|
|
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
| 527 |
|
|
if only to serve as a learning tool.
|
| 528 |
|
|
|
| 529 |
|
|
The RELOCATE_SECTION function is called by the new ELF backend linker
|
| 530 |
|
|
to handle the relocations for a section.
|
| 531 |
|
|
|
| 532 |
|
|
The relocs are always passed as Rela structures; if the section
|
| 533 |
|
|
actually uses Rel structures, the r_addend field will always be
|
| 534 |
|
|
zero.
|
| 535 |
|
|
|
| 536 |
|
|
This function is responsible for adjusting the section contents as
|
| 537 |
|
|
necessary, and (if using Rela relocs and generating a relocatable
|
| 538 |
|
|
output file) adjusting the reloc addend as necessary.
|
| 539 |
|
|
|
| 540 |
|
|
This function does not have to worry about setting the reloc
|
| 541 |
|
|
address or the reloc symbol index.
|
| 542 |
|
|
|
| 543 |
|
|
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
| 544 |
|
|
|
| 545 |
|
|
LOCAL_SECTIONS is an array giving the section in the input file
|
| 546 |
|
|
corresponding to the st_shndx field of each local symbol.
|
| 547 |
|
|
|
| 548 |
|
|
The global hash table entry for the global symbols can be found
|
| 549 |
|
|
via elf_sym_hashes (input_bfd).
|
| 550 |
|
|
|
| 551 |
|
|
When generating relocatable output, this function must handle
|
| 552 |
|
|
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
| 553 |
|
|
going to be the section symbol corresponding to the output
|
| 554 |
|
|
section, which means that the addend must be adjusted
|
| 555 |
|
|
accordingly. */
|
| 556 |
|
|
|
| 557 |
|
|
static bfd_boolean
|
| 558 |
|
|
iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
| 559 |
|
|
struct bfd_link_info * info,
|
| 560 |
|
|
bfd * input_bfd,
|
| 561 |
|
|
asection * input_section,
|
| 562 |
|
|
bfd_byte * contents,
|
| 563 |
|
|
Elf_Internal_Rela * relocs,
|
| 564 |
|
|
Elf_Internal_Sym * local_syms,
|
| 565 |
|
|
asection ** local_sections)
|
| 566 |
|
|
{
|
| 567 |
|
|
Elf_Internal_Shdr * symtab_hdr;
|
| 568 |
|
|
struct elf_link_hash_entry ** sym_hashes;
|
| 569 |
|
|
Elf_Internal_Rela * rel;
|
| 570 |
|
|
Elf_Internal_Rela * relend;
|
| 571 |
|
|
|
| 572 |
|
|
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
| 573 |
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
| 574 |
|
|
relend = relocs + input_section->reloc_count;
|
| 575 |
|
|
|
| 576 |
|
|
for (rel = relocs; rel < relend; rel ++)
|
| 577 |
|
|
{
|
| 578 |
|
|
reloc_howto_type * howto;
|
| 579 |
|
|
unsigned long r_symndx;
|
| 580 |
|
|
Elf_Internal_Sym * sym;
|
| 581 |
|
|
asection * sec;
|
| 582 |
|
|
struct elf_link_hash_entry * h;
|
| 583 |
|
|
bfd_vma relocation;
|
| 584 |
|
|
bfd_reloc_status_type r;
|
| 585 |
|
|
const char * name = NULL;
|
| 586 |
|
|
int r_type;
|
| 587 |
|
|
|
| 588 |
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
| 589 |
|
|
|
| 590 |
|
|
if ( r_type == R_IQ2000_GNU_VTINHERIT
|
| 591 |
|
|
|| r_type == R_IQ2000_GNU_VTENTRY)
|
| 592 |
|
|
continue;
|
| 593 |
|
|
|
| 594 |
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
| 595 |
|
|
|
| 596 |
|
|
howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
| 597 |
|
|
h = NULL;
|
| 598 |
|
|
sym = NULL;
|
| 599 |
|
|
sec = NULL;
|
| 600 |
|
|
|
| 601 |
|
|
if (r_symndx < symtab_hdr->sh_info)
|
| 602 |
|
|
{
|
| 603 |
|
|
asection *osec;
|
| 604 |
|
|
|
| 605 |
|
|
sym = local_syms + r_symndx;
|
| 606 |
|
|
osec = sec = local_sections [r_symndx];
|
| 607 |
|
|
if ((sec->flags & SEC_MERGE)
|
| 608 |
|
|
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
| 609 |
|
|
/* This relocation is relative to a section symbol that is
|
| 610 |
|
|
going to be merged. Change it so that it is relative
|
| 611 |
|
|
to the merged section symbol. */
|
| 612 |
|
|
rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
|
| 613 |
|
|
rel->r_addend);
|
| 614 |
|
|
|
| 615 |
|
|
relocation = (sec->output_section->vma
|
| 616 |
|
|
+ sec->output_offset
|
| 617 |
|
|
+ sym->st_value);
|
| 618 |
|
|
|
| 619 |
|
|
name = bfd_elf_string_from_elf_section
|
| 620 |
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
| 621 |
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
|
| 622 |
|
|
}
|
| 623 |
|
|
else
|
| 624 |
|
|
{
|
| 625 |
|
|
bfd_boolean unresolved_reloc;
|
| 626 |
|
|
bfd_boolean warned;
|
| 627 |
|
|
|
| 628 |
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
| 629 |
|
|
r_symndx, symtab_hdr, sym_hashes,
|
| 630 |
|
|
h, sec, relocation,
|
| 631 |
|
|
unresolved_reloc, warned);
|
| 632 |
|
|
|
| 633 |
|
|
name = h->root.root.string;
|
| 634 |
|
|
}
|
| 635 |
|
|
|
| 636 |
|
|
if (sec != NULL && elf_discarded_section (sec))
|
| 637 |
|
|
{
|
| 638 |
|
|
/* For relocs against symbols from removed linkonce sections,
|
| 639 |
|
|
or sections discarded by a linker script, we just want the
|
| 640 |
|
|
section contents zeroed. Avoid any special processing. */
|
| 641 |
|
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
| 642 |
|
|
rel->r_info = 0;
|
| 643 |
|
|
rel->r_addend = 0;
|
| 644 |
|
|
continue;
|
| 645 |
|
|
}
|
| 646 |
|
|
|
| 647 |
|
|
if (info->relocatable)
|
| 648 |
|
|
continue;
|
| 649 |
|
|
|
| 650 |
|
|
switch (r_type)
|
| 651 |
|
|
{
|
| 652 |
|
|
case R_IQ2000_HI16:
|
| 653 |
|
|
r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
|
| 654 |
|
|
break;
|
| 655 |
|
|
|
| 656 |
|
|
case R_IQ2000_OFFSET_16:
|
| 657 |
|
|
r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
|
| 658 |
|
|
input_section->output_section->vma
|
| 659 |
|
|
+ input_section->output_offset
|
| 660 |
|
|
+ rel->r_offset);
|
| 661 |
|
|
break;
|
| 662 |
|
|
|
| 663 |
|
|
case R_IQ2000_PC16:
|
| 664 |
|
|
rel->r_addend -= 4;
|
| 665 |
|
|
/* Fall through. */
|
| 666 |
|
|
|
| 667 |
|
|
default:
|
| 668 |
|
|
r = iq2000_final_link_relocate (howto, input_bfd, input_section,
|
| 669 |
|
|
contents, rel, relocation);
|
| 670 |
|
|
break;
|
| 671 |
|
|
}
|
| 672 |
|
|
|
| 673 |
|
|
if (r != bfd_reloc_ok)
|
| 674 |
|
|
{
|
| 675 |
|
|
const char * msg = (const char *) NULL;
|
| 676 |
|
|
|
| 677 |
|
|
switch (r)
|
| 678 |
|
|
{
|
| 679 |
|
|
case bfd_reloc_overflow:
|
| 680 |
|
|
r = info->callbacks->reloc_overflow
|
| 681 |
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
| 682 |
|
|
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
| 683 |
|
|
break;
|
| 684 |
|
|
|
| 685 |
|
|
case bfd_reloc_undefined:
|
| 686 |
|
|
r = info->callbacks->undefined_symbol
|
| 687 |
|
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
| 688 |
|
|
break;
|
| 689 |
|
|
|
| 690 |
|
|
case bfd_reloc_outofrange:
|
| 691 |
|
|
msg = _("internal error: out of range error");
|
| 692 |
|
|
break;
|
| 693 |
|
|
|
| 694 |
|
|
case bfd_reloc_notsupported:
|
| 695 |
|
|
msg = _("internal error: unsupported relocation error");
|
| 696 |
|
|
break;
|
| 697 |
|
|
|
| 698 |
|
|
case bfd_reloc_dangerous:
|
| 699 |
|
|
msg = _("internal error: dangerous relocation");
|
| 700 |
|
|
break;
|
| 701 |
|
|
|
| 702 |
|
|
default:
|
| 703 |
|
|
msg = _("internal error: unknown error");
|
| 704 |
|
|
break;
|
| 705 |
|
|
}
|
| 706 |
|
|
|
| 707 |
|
|
if (msg)
|
| 708 |
|
|
r = info->callbacks->warning
|
| 709 |
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
| 710 |
|
|
|
| 711 |
|
|
if (! r)
|
| 712 |
|
|
return FALSE;
|
| 713 |
|
|
}
|
| 714 |
|
|
}
|
| 715 |
|
|
|
| 716 |
|
|
return TRUE;
|
| 717 |
|
|
}
|
| 718 |
|
|
|
| 719 |
|
|
|
| 720 |
|
|
/* Return the section that should be marked against GC for a given
|
| 721 |
|
|
relocation. */
|
| 722 |
|
|
|
| 723 |
|
|
static asection *
|
| 724 |
|
|
iq2000_elf_gc_mark_hook (asection *sec,
|
| 725 |
|
|
struct bfd_link_info *info,
|
| 726 |
|
|
Elf_Internal_Rela *rel,
|
| 727 |
|
|
struct elf_link_hash_entry *h,
|
| 728 |
|
|
Elf_Internal_Sym *sym)
|
| 729 |
|
|
{
|
| 730 |
|
|
if (h != NULL)
|
| 731 |
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
| 732 |
|
|
{
|
| 733 |
|
|
case R_IQ2000_GNU_VTINHERIT:
|
| 734 |
|
|
case R_IQ2000_GNU_VTENTRY:
|
| 735 |
|
|
return NULL;
|
| 736 |
|
|
}
|
| 737 |
|
|
|
| 738 |
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
| 739 |
|
|
}
|
| 740 |
|
|
|
| 741 |
|
|
|
| 742 |
|
|
/* Return the MACH for an e_flags value. */
|
| 743 |
|
|
|
| 744 |
|
|
static int
|
| 745 |
|
|
elf32_iq2000_machine (bfd *abfd)
|
| 746 |
|
|
{
|
| 747 |
|
|
switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
|
| 748 |
|
|
{
|
| 749 |
|
|
case EF_IQ2000_CPU_IQ10:
|
| 750 |
|
|
return bfd_mach_iq10;
|
| 751 |
|
|
|
| 752 |
|
|
case EF_IQ2000_CPU_IQ2000:
|
| 753 |
|
|
default:
|
| 754 |
|
|
return bfd_mach_iq2000;
|
| 755 |
|
|
}
|
| 756 |
|
|
}
|
| 757 |
|
|
|
| 758 |
|
|
|
| 759 |
|
|
/* Function to set the ELF flag bits. */
|
| 760 |
|
|
|
| 761 |
|
|
static bfd_boolean
|
| 762 |
|
|
iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
|
| 763 |
|
|
{
|
| 764 |
|
|
elf_elfheader (abfd)->e_flags = flags;
|
| 765 |
|
|
elf_flags_init (abfd) = TRUE;
|
| 766 |
|
|
return TRUE;
|
| 767 |
|
|
}
|
| 768 |
|
|
|
| 769 |
|
|
/* Copy backend specific data from one object module to another. */
|
| 770 |
|
|
|
| 771 |
|
|
static bfd_boolean
|
| 772 |
|
|
iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
| 773 |
|
|
{
|
| 774 |
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
| 775 |
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
| 776 |
|
|
return TRUE;
|
| 777 |
|
|
|
| 778 |
|
|
BFD_ASSERT (!elf_flags_init (obfd)
|
| 779 |
|
|
|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
|
| 780 |
|
|
|
| 781 |
|
|
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
| 782 |
|
|
elf_flags_init (obfd) = TRUE;
|
| 783 |
|
|
|
| 784 |
|
|
/* Copy object attributes. */
|
| 785 |
|
|
_bfd_elf_copy_obj_attributes (ibfd, obfd);
|
| 786 |
|
|
|
| 787 |
|
|
return TRUE;
|
| 788 |
|
|
}
|
| 789 |
|
|
|
| 790 |
|
|
/* Merge backend specific data from an object
|
| 791 |
|
|
file to the output object file when linking. */
|
| 792 |
|
|
|
| 793 |
|
|
static bfd_boolean
|
| 794 |
|
|
iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
| 795 |
|
|
{
|
| 796 |
|
|
flagword old_flags, old_partial;
|
| 797 |
|
|
flagword new_flags, new_partial;
|
| 798 |
|
|
bfd_boolean error = FALSE;
|
| 799 |
|
|
char new_opt[80];
|
| 800 |
|
|
char old_opt[80];
|
| 801 |
|
|
|
| 802 |
|
|
new_opt[0] = old_opt[0] = '\0';
|
| 803 |
|
|
new_flags = elf_elfheader (ibfd)->e_flags;
|
| 804 |
|
|
old_flags = elf_elfheader (obfd)->e_flags;
|
| 805 |
|
|
|
| 806 |
|
|
if (!elf_flags_init (obfd))
|
| 807 |
|
|
{
|
| 808 |
|
|
/* First call, no flags set. */
|
| 809 |
|
|
elf_flags_init (obfd) = TRUE;
|
| 810 |
|
|
elf_elfheader (obfd)->e_flags = new_flags;
|
| 811 |
|
|
}
|
| 812 |
|
|
|
| 813 |
|
|
else if (new_flags != old_flags)
|
| 814 |
|
|
{
|
| 815 |
|
|
/* Warn if different cpu is used, but allow a
|
| 816 |
|
|
specific cpu to override the generic cpu. */
|
| 817 |
|
|
new_partial = (new_flags & EF_IQ2000_CPU_MASK);
|
| 818 |
|
|
old_partial = (old_flags & EF_IQ2000_CPU_MASK);
|
| 819 |
|
|
|
| 820 |
|
|
if (new_partial != old_partial)
|
| 821 |
|
|
{
|
| 822 |
|
|
switch (new_partial)
|
| 823 |
|
|
{
|
| 824 |
|
|
case EF_IQ2000_CPU_IQ10:
|
| 825 |
|
|
strcat (new_opt, " -m10");
|
| 826 |
|
|
break;
|
| 827 |
|
|
|
| 828 |
|
|
default:
|
| 829 |
|
|
case EF_IQ2000_CPU_IQ2000:
|
| 830 |
|
|
strcat (new_opt, " -m2000");
|
| 831 |
|
|
break;
|
| 832 |
|
|
}
|
| 833 |
|
|
|
| 834 |
|
|
switch (old_partial)
|
| 835 |
|
|
{
|
| 836 |
|
|
case EF_IQ2000_CPU_IQ10:
|
| 837 |
|
|
strcat (old_opt, " -m10");
|
| 838 |
|
|
break;
|
| 839 |
|
|
|
| 840 |
|
|
default:
|
| 841 |
|
|
case EF_IQ2000_CPU_IQ2000:
|
| 842 |
|
|
strcat (old_opt, " -m2000");
|
| 843 |
|
|
break;
|
| 844 |
|
|
}
|
| 845 |
|
|
}
|
| 846 |
|
|
|
| 847 |
|
|
/* Print out any mismatches from above. */
|
| 848 |
|
|
if (new_opt[0])
|
| 849 |
|
|
{
|
| 850 |
|
|
error = TRUE;
|
| 851 |
|
|
_bfd_error_handler
|
| 852 |
|
|
(_("%s: compiled with %s and linked with modules compiled with %s"),
|
| 853 |
|
|
bfd_get_filename (ibfd), new_opt, old_opt);
|
| 854 |
|
|
}
|
| 855 |
|
|
|
| 856 |
|
|
new_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
| 857 |
|
|
old_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
| 858 |
|
|
|
| 859 |
|
|
/* Warn about any other mismatches. */
|
| 860 |
|
|
if (new_flags != old_flags)
|
| 861 |
|
|
{
|
| 862 |
|
|
error = TRUE;
|
| 863 |
|
|
|
| 864 |
|
|
_bfd_error_handler
|
| 865 |
|
|
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
| 866 |
|
|
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
|
| 867 |
|
|
}
|
| 868 |
|
|
}
|
| 869 |
|
|
|
| 870 |
|
|
if (error)
|
| 871 |
|
|
bfd_set_error (bfd_error_bad_value);
|
| 872 |
|
|
|
| 873 |
|
|
return !error;
|
| 874 |
|
|
}
|
| 875 |
|
|
|
| 876 |
|
|
|
| 877 |
|
|
static bfd_boolean
|
| 878 |
|
|
iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
|
| 879 |
|
|
{
|
| 880 |
|
|
FILE *file = (FILE *) ptr;
|
| 881 |
|
|
flagword flags;
|
| 882 |
|
|
|
| 883 |
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
| 884 |
|
|
|
| 885 |
|
|
/* Print normal ELF private data. */
|
| 886 |
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
| 887 |
|
|
|
| 888 |
|
|
flags = elf_elfheader (abfd)->e_flags;
|
| 889 |
225 |
jeremybenn |
fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
|
| 890 |
24 |
jeremybenn |
|
| 891 |
|
|
switch (flags & EF_IQ2000_CPU_MASK)
|
| 892 |
|
|
{
|
| 893 |
|
|
case EF_IQ2000_CPU_IQ10:
|
| 894 |
|
|
fprintf (file, " -m10");
|
| 895 |
|
|
break;
|
| 896 |
|
|
case EF_IQ2000_CPU_IQ2000:
|
| 897 |
|
|
fprintf (file, " -m2000");
|
| 898 |
|
|
break;
|
| 899 |
|
|
default:
|
| 900 |
|
|
break;
|
| 901 |
|
|
}
|
| 902 |
|
|
|
| 903 |
|
|
fputc ('\n', file);
|
| 904 |
|
|
return TRUE;
|
| 905 |
|
|
}
|
| 906 |
|
|
|
| 907 |
|
|
static
|
| 908 |
|
|
bfd_boolean
|
| 909 |
|
|
iq2000_elf_object_p (bfd *abfd)
|
| 910 |
|
|
{
|
| 911 |
|
|
bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
|
| 912 |
|
|
elf32_iq2000_machine (abfd));
|
| 913 |
|
|
return TRUE;
|
| 914 |
|
|
}
|
| 915 |
|
|
|
| 916 |
|
|
|
| 917 |
|
|
#define ELF_ARCH bfd_arch_iq2000
|
| 918 |
|
|
#define ELF_MACHINE_CODE EM_IQ2000
|
| 919 |
|
|
#define ELF_MAXPAGESIZE 0x1000
|
| 920 |
|
|
|
| 921 |
|
|
#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
|
| 922 |
|
|
#define TARGET_BIG_NAME "elf32-iq2000"
|
| 923 |
|
|
|
| 924 |
|
|
#define elf_info_to_howto_rel NULL
|
| 925 |
|
|
#define elf_info_to_howto iq2000_info_to_howto_rela
|
| 926 |
|
|
#define elf_backend_relocate_section iq2000_elf_relocate_section
|
| 927 |
|
|
#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
|
| 928 |
|
|
#define elf_backend_check_relocs iq2000_elf_check_relocs
|
| 929 |
|
|
#define elf_backend_object_p iq2000_elf_object_p
|
| 930 |
|
|
#define elf_backend_rela_normal 1
|
| 931 |
|
|
|
| 932 |
|
|
#define elf_backend_can_gc_sections 1
|
| 933 |
|
|
|
| 934 |
|
|
#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
|
| 935 |
|
|
#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
|
| 936 |
|
|
#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
|
| 937 |
|
|
#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
|
| 938 |
|
|
#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
|
| 939 |
|
|
#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
|
| 940 |
|
|
|
| 941 |
|
|
#include "elf32-target.h"
|
