/* MSP430-specific support for 32-bit ELF
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/* MSP430-specific support for 32-bit ELF
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Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
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Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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Contributed by Dmitry Diky <diwil@mail.ru>
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Contributed by Dmitry Diky <diwil@mail.ru>
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This file is part of BFD, the Binary File Descriptor library.
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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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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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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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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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(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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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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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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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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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfd.h"
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#include "libiberty.h"
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#include "libiberty.h"
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#include "libbfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf-bfd.h"
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#include "elf/msp430.h"
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#include "elf/msp430.h"
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/* Use RELA instead of REL. */
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/* Use RELA instead of REL. */
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#undef USE_REL
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#undef USE_REL
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static reloc_howto_type elf_msp430_howto_table[] =
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static reloc_howto_type elf_msp430_howto_table[] =
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{
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{
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HOWTO (R_MSP430_NONE, /* type */
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HOWTO (R_MSP430_NONE, /* type */
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0, /* rightshift */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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32, /* bitsize */
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FALSE, /* pc_relative */
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FALSE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_NONE", /* name */
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"R_MSP430_NONE", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* src_mask */
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0, /* dst_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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FALSE), /* pcrel_offset */
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HOWTO (R_MSP430_32, /* type */
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HOWTO (R_MSP430_32, /* type */
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0, /* rightshift */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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32, /* bitsize */
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FALSE, /* pc_relative */
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FALSE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_32", /* name */
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"R_MSP430_32", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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FALSE), /* pcrel_offset */
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/* A 13 bit PC relative relocation. */
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/* A 13 bit PC relative relocation. */
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HOWTO (R_MSP430_10_PCREL, /* type */
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HOWTO (R_MSP430_10_PCREL, /* type */
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1, /* rightshift */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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10, /* bitsize */
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TRUE, /* pc_relative */
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TRUE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_13_PCREL", /* name */
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"R_MSP430_13_PCREL", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0xfff, /* src_mask */
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0xfff, /* src_mask */
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0xfff, /* dst_mask */
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0xfff, /* dst_mask */
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TRUE), /* pcrel_offset */
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TRUE), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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/* A 16 bit absolute relocation. */
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HOWTO (R_MSP430_16, /* type */
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HOWTO (R_MSP430_16, /* type */
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0, /* rightshift */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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16, /* bitsize */
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FALSE, /* pc_relative */
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FALSE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16", /* name */
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"R_MSP430_16", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* src_mask */
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0xffff, /* dst_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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FALSE), /* pcrel_offset */
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/* A 16 bit absolute relocation for command address. */
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/* A 16 bit absolute relocation for command address. */
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HOWTO (R_MSP430_16_PCREL, /* type */
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HOWTO (R_MSP430_16_PCREL, /* type */
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1, /* rightshift */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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16, /* bitsize */
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TRUE, /* pc_relative */
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TRUE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_PCREL", /* name */
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"R_MSP430_16_PCREL", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* src_mask */
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0xffff, /* dst_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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TRUE), /* pcrel_offset */
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/* A 16 bit absolute relocation, byte operations. */
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/* A 16 bit absolute relocation, byte operations. */
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HOWTO (R_MSP430_16_BYTE, /* type */
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HOWTO (R_MSP430_16_BYTE, /* type */
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0, /* rightshift */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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16, /* bitsize */
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FALSE, /* pc_relative */
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FALSE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_BYTE", /* name */
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"R_MSP430_16_BYTE", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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FALSE), /* pcrel_offset */
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/* A 16 bit absolute relocation for command address. */
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/* A 16 bit absolute relocation for command address. */
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HOWTO (R_MSP430_16_PCREL_BYTE,/* type */
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HOWTO (R_MSP430_16_PCREL_BYTE,/* type */
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1, /* rightshift */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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16, /* bitsize */
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TRUE, /* pc_relative */
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TRUE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_PCREL_BYTE",/* name */
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"R_MSP430_16_PCREL_BYTE",/* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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TRUE), /* pcrel_offset */
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/* A 13 bit PC relative relocation for complicated polymorphs. */
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/* A 13 bit PC relative relocation for complicated polymorphs. */
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HOWTO (R_MSP430_2X_PCREL, /* type */
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HOWTO (R_MSP430_2X_PCREL, /* type */
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1, /* rightshift */
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1, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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10, /* bitsize */
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TRUE, /* pc_relative */
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TRUE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_2X_PCREL", /* name */
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"R_MSP430_2X_PCREL", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0xfff, /* src_mask */
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0xfff, /* src_mask */
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0xfff, /* dst_mask */
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0xfff, /* dst_mask */
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TRUE), /* pcrel_offset */
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TRUE), /* pcrel_offset */
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/* A 16 bit relaxable relocation for command address. */
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/* A 16 bit relaxable relocation for command address. */
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HOWTO (R_MSP430_RL_PCREL, /* type */
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HOWTO (R_MSP430_RL_PCREL, /* type */
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1, /* rightshift */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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16, /* bitsize */
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TRUE, /* pc_relative */
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TRUE, /* pc_relative */
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0, /* bitpos */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_RL_PCREL", /* name */
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"R_MSP430_RL_PCREL", /* name */
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FALSE, /* partial_inplace */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* src_mask */
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0xffff, /* dst_mask */
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0xffff, /* dst_mask */
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TRUE) /* pcrel_offset */
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TRUE) /* pcrel_offset */
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};
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};
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/* Map BFD reloc types to MSP430 ELF reloc types. */
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/* Map BFD reloc types to MSP430 ELF reloc types. */
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struct msp430_reloc_map
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struct msp430_reloc_map
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{
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int elf_reloc_val;
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unsigned int elf_reloc_val;
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};
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};
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static const struct msp430_reloc_map msp430_reloc_map[] =
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static const struct msp430_reloc_map msp430_reloc_map[] =
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{
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{
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{BFD_RELOC_NONE, R_MSP430_NONE},
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{BFD_RELOC_NONE, R_MSP430_NONE},
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{BFD_RELOC_32, R_MSP430_32},
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{BFD_RELOC_32, R_MSP430_32},
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{BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
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{BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
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{BFD_RELOC_16, R_MSP430_16_BYTE},
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{BFD_RELOC_16, R_MSP430_16_BYTE},
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{BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
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{BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
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{BFD_RELOC_MSP430_16, R_MSP430_16},
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{BFD_RELOC_MSP430_16, R_MSP430_16},
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{BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
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{BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
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{BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
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{BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
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{BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
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{BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
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{BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL}
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{BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL}
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};
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};
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static reloc_howto_type *
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
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bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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bfd_reloc_code_real_type code)
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{
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{
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unsigned int i;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
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for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
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if (msp430_reloc_map[i].bfd_reloc_val == code)
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if (msp430_reloc_map[i].bfd_reloc_val == code)
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return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
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return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
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return NULL;
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return NULL;
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}
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}
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static reloc_howto_type *
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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const char *r_name)
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{
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{
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unsigned int i;
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unsigned int i;
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for (i = 0;
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for (i = 0;
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i < (sizeof (elf_msp430_howto_table)
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i < (sizeof (elf_msp430_howto_table)
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/ sizeof (elf_msp430_howto_table[0]));
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/ sizeof (elf_msp430_howto_table[0]));
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i++)
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i++)
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if (elf_msp430_howto_table[i].name != NULL
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if (elf_msp430_howto_table[i].name != NULL
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&& strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
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&& strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
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return &elf_msp430_howto_table[i];
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return &elf_msp430_howto_table[i];
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return NULL;
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return NULL;
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}
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}
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/* Set the howto pointer for an MSP430 ELF reloc. */
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/* Set the howto pointer for an MSP430 ELF reloc. */
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static void
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static void
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msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
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msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
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arelent * cache_ptr,
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arelent * cache_ptr,
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Elf_Internal_Rela * dst)
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Elf_Internal_Rela * dst)
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{
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{
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unsigned int r_type;
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_MSP430_max);
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BFD_ASSERT (r_type < (unsigned int) R_MSP430_max);
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cache_ptr->howto = &elf_msp430_howto_table[r_type];
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cache_ptr->howto = &elf_msp430_howto_table[r_type];
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}
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}
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/* Look through the relocs for a section during the first phase.
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/* Look through the relocs for a section during the first phase.
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Since we don't do .gots or .plts, we just need to consider the
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Since we don't do .gots or .plts, we just need to consider the
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virtual table relocs for gc. */
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virtual table relocs for gc. */
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static bfd_boolean
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static bfd_boolean
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elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
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elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
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asection * sec, const Elf_Internal_Rela * relocs)
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asection * sec, const Elf_Internal_Rela * relocs)
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{
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{
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Elf_Internal_Shdr *symtab_hdr;
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Elf_Internal_Shdr *symtab_hdr;
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struct elf_link_hash_entry **sym_hashes;
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struct elf_link_hash_entry **sym_hashes;
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const Elf_Internal_Rela *rel;
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const Elf_Internal_Rela *rel;
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const Elf_Internal_Rela *rel_end;
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const Elf_Internal_Rela *rel_end;
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if (info->relocatable)
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if (info->relocatable)
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return TRUE;
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return TRUE;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (abfd);
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sym_hashes = elf_sym_hashes (abfd);
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rel_end = relocs + sec->reloc_count;
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rel_end = relocs + sec->reloc_count;
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for (rel = relocs; rel < rel_end; rel++)
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for (rel = relocs; rel < rel_end; rel++)
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{
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{
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struct elf_link_hash_entry *h;
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struct elf_link_hash_entry *h;
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unsigned long r_symndx;
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unsigned long r_symndx;
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r_symndx = ELF32_R_SYM (rel->r_info);
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r_symndx = ELF32_R_SYM (rel->r_info);
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if (r_symndx < symtab_hdr->sh_info)
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if (r_symndx < symtab_hdr->sh_info)
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h = NULL;
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h = NULL;
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else
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else
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{
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{
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h = sym_hashes[r_symndx - symtab_hdr->sh_info];
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h = sym_hashes[r_symndx - symtab_hdr->sh_info];
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while (h->root.type == bfd_link_hash_indirect
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while (h->root.type == bfd_link_hash_indirect
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|| h->root.type == bfd_link_hash_warning)
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|| h->root.type == bfd_link_hash_warning)
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h = (struct elf_link_hash_entry *) h->root.u.i.link;
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h = (struct elf_link_hash_entry *) h->root.u.i.link;
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}
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}
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}
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}
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return TRUE;
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return TRUE;
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}
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}
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/* Perform a single relocation. By default we use the standard BFD
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/* Perform a single relocation. By default we use the standard BFD
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routines, but a few relocs, we have to do them ourselves. */
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routines, but a few relocs, we have to do them ourselves. */
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static bfd_reloc_status_type
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static bfd_reloc_status_type
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msp430_final_link_relocate (reloc_howto_type * howto, bfd * input_bfd,
|
msp430_final_link_relocate (reloc_howto_type * howto, bfd * input_bfd,
|
asection * input_section, bfd_byte * contents,
|
asection * input_section, bfd_byte * contents,
|
Elf_Internal_Rela * rel, bfd_vma relocation)
|
Elf_Internal_Rela * rel, bfd_vma relocation)
|
{
|
{
|
bfd_reloc_status_type r = bfd_reloc_ok;
|
bfd_reloc_status_type r = bfd_reloc_ok;
|
bfd_vma x;
|
bfd_vma x;
|
bfd_signed_vma srel;
|
bfd_signed_vma srel;
|
|
|
switch (howto->type)
|
switch (howto->type)
|
{
|
{
|
case R_MSP430_10_PCREL:
|
case R_MSP430_10_PCREL:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
srel -= rel->r_offset;
|
srel -= rel->r_offset;
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
srel -= (input_section->output_section->vma +
|
srel -= (input_section->output_section->vma +
|
input_section->output_offset);
|
input_section->output_offset);
|
|
|
if (srel & 1)
|
if (srel & 1)
|
return bfd_reloc_outofrange;
|
return bfd_reloc_outofrange;
|
|
|
/* MSP430 addresses commands as words. */
|
/* MSP430 addresses commands as words. */
|
srel >>= 1;
|
srel >>= 1;
|
|
|
/* Check for an overflow. */
|
/* Check for an overflow. */
|
if (srel < -512 || srel > 511)
|
if (srel < -512 || srel > 511)
|
return bfd_reloc_overflow;
|
return bfd_reloc_overflow;
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
x = bfd_get_16 (input_bfd, contents);
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
bfd_put_16 (input_bfd, x, contents);
|
bfd_put_16 (input_bfd, x, contents);
|
break;
|
break;
|
|
|
case R_MSP430_2X_PCREL:
|
case R_MSP430_2X_PCREL:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
srel -= rel->r_offset;
|
srel -= rel->r_offset;
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
srel -= (input_section->output_section->vma +
|
srel -= (input_section->output_section->vma +
|
input_section->output_offset);
|
input_section->output_offset);
|
|
|
if (srel & 1)
|
if (srel & 1)
|
return bfd_reloc_outofrange;
|
return bfd_reloc_outofrange;
|
|
|
/* MSP430 addresses commands as words. */
|
/* MSP430 addresses commands as words. */
|
srel >>= 1;
|
srel >>= 1;
|
|
|
/* Check for an overflow. */
|
/* Check for an overflow. */
|
if (srel < -512 || srel > 511)
|
if (srel < -512 || srel > 511)
|
return bfd_reloc_overflow;
|
return bfd_reloc_overflow;
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
x = bfd_get_16 (input_bfd, contents);
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
bfd_put_16 (input_bfd, x, contents);
|
bfd_put_16 (input_bfd, x, contents);
|
/* Handle second jump instruction. */
|
/* Handle second jump instruction. */
|
x = bfd_get_16 (input_bfd, contents - 2);
|
x = bfd_get_16 (input_bfd, contents - 2);
|
srel += 1;
|
srel += 1;
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
bfd_put_16 (input_bfd, x, contents - 2);
|
bfd_put_16 (input_bfd, x, contents - 2);
|
break;
|
break;
|
|
|
case R_MSP430_16_PCREL:
|
case R_MSP430_16_PCREL:
|
case R_MSP430_RL_PCREL:
|
case R_MSP430_RL_PCREL:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
srel -= rel->r_offset;
|
srel -= rel->r_offset;
|
/* Only branch instructions add 2 to the PC... */
|
/* Only branch instructions add 2 to the PC... */
|
srel -= (input_section->output_section->vma +
|
srel -= (input_section->output_section->vma +
|
input_section->output_offset);
|
input_section->output_offset);
|
|
|
if (srel & 1)
|
if (srel & 1)
|
return bfd_reloc_outofrange;
|
return bfd_reloc_outofrange;
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
break;
|
break;
|
|
|
case R_MSP430_16_PCREL_BYTE:
|
case R_MSP430_16_PCREL_BYTE:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
srel -= rel->r_offset;
|
srel -= rel->r_offset;
|
/* Only branch instructions add 2 to the PC... */
|
/* Only branch instructions add 2 to the PC... */
|
srel -= (input_section->output_section->vma +
|
srel -= (input_section->output_section->vma +
|
input_section->output_offset);
|
input_section->output_offset);
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
break;
|
break;
|
|
|
case R_MSP430_16_BYTE:
|
case R_MSP430_16_BYTE:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
break;
|
break;
|
|
|
case R_MSP430_16:
|
case R_MSP430_16:
|
contents += rel->r_offset;
|
contents += rel->r_offset;
|
srel = (bfd_signed_vma) relocation;
|
srel = (bfd_signed_vma) relocation;
|
srel += rel->r_addend;
|
srel += rel->r_addend;
|
|
|
if (srel & 1)
|
if (srel & 1)
|
return bfd_reloc_notsupported;
|
return bfd_reloc_notsupported;
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
break;
|
break;
|
|
|
default:
|
default:
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
contents, rel->r_offset,
|
contents, rel->r_offset,
|
relocation, rel->r_addend);
|
relocation, rel->r_addend);
|
}
|
}
|
|
|
return r;
|
return r;
|
}
|
}
|
|
|
/* Relocate an MSP430 ELF section. */
|
/* Relocate an MSP430 ELF section. */
|
|
|
static bfd_boolean
|
static bfd_boolean
|
elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
struct bfd_link_info * info,
|
struct bfd_link_info * info,
|
bfd * input_bfd,
|
bfd * input_bfd,
|
asection * input_section,
|
asection * input_section,
|
bfd_byte * contents,
|
bfd_byte * contents,
|
Elf_Internal_Rela * relocs,
|
Elf_Internal_Rela * relocs,
|
Elf_Internal_Sym * local_syms,
|
Elf_Internal_Sym * local_syms,
|
asection ** local_sections)
|
asection ** local_sections)
|
{
|
{
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
Elf_Internal_Rela *rel;
|
Elf_Internal_Rela *rel;
|
Elf_Internal_Rela *relend;
|
Elf_Internal_Rela *relend;
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
sym_hashes = elf_sym_hashes (input_bfd);
|
sym_hashes = elf_sym_hashes (input_bfd);
|
relend = relocs + input_section->reloc_count;
|
relend = relocs + input_section->reloc_count;
|
|
|
for (rel = relocs; rel < relend; rel++)
|
for (rel = relocs; rel < relend; rel++)
|
{
|
{
|
reloc_howto_type *howto;
|
reloc_howto_type *howto;
|
unsigned long r_symndx;
|
unsigned long r_symndx;
|
Elf_Internal_Sym *sym;
|
Elf_Internal_Sym *sym;
|
asection *sec;
|
asection *sec;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
bfd_vma relocation;
|
bfd_vma relocation;
|
bfd_reloc_status_type r;
|
bfd_reloc_status_type r;
|
const char *name = NULL;
|
const char *name = NULL;
|
int r_type;
|
int r_type;
|
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
r_type = ELF32_R_TYPE (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
howto = elf_msp430_howto_table + ELF32_R_TYPE (rel->r_info);
|
howto = elf_msp430_howto_table + ELF32_R_TYPE (rel->r_info);
|
h = NULL;
|
h = NULL;
|
sym = NULL;
|
sym = NULL;
|
sec = NULL;
|
sec = NULL;
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
if (r_symndx < symtab_hdr->sh_info)
|
{
|
{
|
sym = local_syms + r_symndx;
|
sym = local_syms + r_symndx;
|
sec = local_sections[r_symndx];
|
sec = local_sections[r_symndx];
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
|
name = bfd_elf_string_from_elf_section
|
name = bfd_elf_string_from_elf_section
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
}
|
}
|
else
|
else
|
{
|
{
|
bfd_boolean unresolved_reloc, warned;
|
bfd_boolean unresolved_reloc, warned;
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
r_symndx, symtab_hdr, sym_hashes,
|
r_symndx, symtab_hdr, sym_hashes,
|
h, sec, relocation,
|
h, sec, relocation,
|
unresolved_reloc, warned);
|
unresolved_reloc, warned);
|
}
|
}
|
|
|
if (sec != NULL && elf_discarded_section (sec))
|
if (sec != NULL && elf_discarded_section (sec))
|
{
|
{
|
/* For relocs against symbols from removed linkonce sections,
|
/* For relocs against symbols from removed linkonce sections,
|
or sections discarded by a linker script, we just want the
|
or sections discarded by a linker script, we just want the
|
section contents zeroed. Avoid any special processing. */
|
section contents zeroed. Avoid any special processing. */
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
rel->r_info = 0;
|
rel->r_info = 0;
|
rel->r_addend = 0;
|
rel->r_addend = 0;
|
continue;
|
continue;
|
}
|
}
|
|
|
if (info->relocatable)
|
if (info->relocatable)
|
continue;
|
continue;
|
|
|
r = msp430_final_link_relocate (howto, input_bfd, input_section,
|
r = msp430_final_link_relocate (howto, input_bfd, input_section,
|
contents, rel, relocation);
|
contents, rel, relocation);
|
|
|
if (r != bfd_reloc_ok)
|
if (r != bfd_reloc_ok)
|
{
|
{
|
const char *msg = (const char *) NULL;
|
const char *msg = (const char *) NULL;
|
|
|
switch (r)
|
switch (r)
|
{
|
{
|
case bfd_reloc_overflow:
|
case bfd_reloc_overflow:
|
r = info->callbacks->reloc_overflow
|
r = info->callbacks->reloc_overflow
|
(info, (h ? &h->root : NULL), name, howto->name,
|
(info, (h ? &h->root : NULL), name, howto->name,
|
(bfd_vma) 0, input_bfd, input_section,
|
(bfd_vma) 0, input_bfd, input_section,
|
rel->r_offset);
|
rel->r_offset);
|
break;
|
break;
|
|
|
case bfd_reloc_undefined:
|
case bfd_reloc_undefined:
|
r = info->callbacks->undefined_symbol
|
r = info->callbacks->undefined_symbol
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
break;
|
break;
|
|
|
case bfd_reloc_outofrange:
|
case bfd_reloc_outofrange:
|
msg = _("internal error: out of range error");
|
msg = _("internal error: out of range error");
|
break;
|
break;
|
|
|
case bfd_reloc_notsupported:
|
case bfd_reloc_notsupported:
|
msg = _("internal error: unsupported relocation error");
|
msg = _("internal error: unsupported relocation error");
|
break;
|
break;
|
|
|
case bfd_reloc_dangerous:
|
case bfd_reloc_dangerous:
|
msg = _("internal error: dangerous relocation");
|
msg = _("internal error: dangerous relocation");
|
break;
|
break;
|
|
|
default:
|
default:
|
msg = _("internal error: unknown error");
|
msg = _("internal error: unknown error");
|
break;
|
break;
|
}
|
}
|
|
|
if (msg)
|
if (msg)
|
r = info->callbacks->warning
|
r = info->callbacks->warning
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
|
|
if (!r)
|
if (!r)
|
return FALSE;
|
return FALSE;
|
}
|
}
|
|
|
}
|
}
|
|
|
return TRUE;
|
return TRUE;
|
}
|
}
|
|
|
/* The final processing done just before writing out a MSP430 ELF object
|
/* The final processing done just before writing out a MSP430 ELF object
|
file. This gets the MSP430 architecture right based on the machine
|
file. This gets the MSP430 architecture right based on the machine
|
number. */
|
number. */
|
|
|
static void
|
static void
|
bfd_elf_msp430_final_write_processing (bfd * abfd,
|
bfd_elf_msp430_final_write_processing (bfd * abfd,
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
{
|
{
|
unsigned long val;
|
unsigned long val;
|
|
|
switch (bfd_get_mach (abfd))
|
switch (bfd_get_mach (abfd))
|
{
|
{
|
default:
|
default:
|
case bfd_mach_msp110:
|
case bfd_mach_msp110:
|
val = E_MSP430_MACH_MSP430x11x1;
|
val = E_MSP430_MACH_MSP430x11x1;
|
break;
|
break;
|
|
|
case bfd_mach_msp11:
|
case bfd_mach_msp11:
|
val = E_MSP430_MACH_MSP430x11;
|
val = E_MSP430_MACH_MSP430x11;
|
break;
|
break;
|
|
|
case bfd_mach_msp12:
|
case bfd_mach_msp12:
|
val = E_MSP430_MACH_MSP430x12;
|
val = E_MSP430_MACH_MSP430x12;
|
break;
|
break;
|
|
|
case bfd_mach_msp13:
|
case bfd_mach_msp13:
|
val = E_MSP430_MACH_MSP430x13;
|
val = E_MSP430_MACH_MSP430x13;
|
break;
|
break;
|
|
|
case bfd_mach_msp14:
|
case bfd_mach_msp14:
|
val = E_MSP430_MACH_MSP430x14;
|
val = E_MSP430_MACH_MSP430x14;
|
break;
|
break;
|
|
|
case bfd_mach_msp15:
|
case bfd_mach_msp15:
|
val = E_MSP430_MACH_MSP430x15;
|
val = E_MSP430_MACH_MSP430x15;
|
break;
|
break;
|
|
|
case bfd_mach_msp16:
|
case bfd_mach_msp16:
|
val = E_MSP430_MACH_MSP430x16;
|
val = E_MSP430_MACH_MSP430x16;
|
break;
|
break;
|
|
|
case bfd_mach_msp31:
|
case bfd_mach_msp31:
|
val = E_MSP430_MACH_MSP430x31;
|
val = E_MSP430_MACH_MSP430x31;
|
break;
|
break;
|
|
|
case bfd_mach_msp32:
|
case bfd_mach_msp32:
|
val = E_MSP430_MACH_MSP430x32;
|
val = E_MSP430_MACH_MSP430x32;
|
break;
|
break;
|
|
|
case bfd_mach_msp33:
|
case bfd_mach_msp33:
|
val = E_MSP430_MACH_MSP430x33;
|
val = E_MSP430_MACH_MSP430x33;
|
break;
|
break;
|
|
|
case bfd_mach_msp41:
|
case bfd_mach_msp41:
|
val = E_MSP430_MACH_MSP430x41;
|
val = E_MSP430_MACH_MSP430x41;
|
break;
|
break;
|
|
|
case bfd_mach_msp42:
|
case bfd_mach_msp42:
|
val = E_MSP430_MACH_MSP430x42;
|
val = E_MSP430_MACH_MSP430x42;
|
break;
|
break;
|
|
|
case bfd_mach_msp43:
|
case bfd_mach_msp43:
|
val = E_MSP430_MACH_MSP430x43;
|
val = E_MSP430_MACH_MSP430x43;
|
break;
|
break;
|
|
|
case bfd_mach_msp44:
|
case bfd_mach_msp44:
|
val = E_MSP430_MACH_MSP430x44;
|
val = E_MSP430_MACH_MSP430x44;
|
break;
|
break;
|
}
|
}
|
|
|
elf_elfheader (abfd)->e_machine = EM_MSP430;
|
elf_elfheader (abfd)->e_machine = EM_MSP430;
|
elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
|
elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
|
elf_elfheader (abfd)->e_flags |= val;
|
elf_elfheader (abfd)->e_flags |= val;
|
}
|
}
|
|
|
/* Set the right machine number. */
|
/* Set the right machine number. */
|
|
|
static bfd_boolean
|
static bfd_boolean
|
elf32_msp430_object_p (bfd * abfd)
|
elf32_msp430_object_p (bfd * abfd)
|
{
|
{
|
int e_set = bfd_mach_msp14;
|
int e_set = bfd_mach_msp14;
|
|
|
if (elf_elfheader (abfd)->e_machine == EM_MSP430
|
if (elf_elfheader (abfd)->e_machine == EM_MSP430
|
|| elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
|
|| elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
|
{
|
{
|
int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
|
int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
|
|
|
switch (e_mach)
|
switch (e_mach)
|
{
|
{
|
default:
|
default:
|
case E_MSP430_MACH_MSP430x11:
|
case E_MSP430_MACH_MSP430x11:
|
e_set = bfd_mach_msp11;
|
e_set = bfd_mach_msp11;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x11x1:
|
case E_MSP430_MACH_MSP430x11x1:
|
e_set = bfd_mach_msp110;
|
e_set = bfd_mach_msp110;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x12:
|
case E_MSP430_MACH_MSP430x12:
|
e_set = bfd_mach_msp12;
|
e_set = bfd_mach_msp12;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x13:
|
case E_MSP430_MACH_MSP430x13:
|
e_set = bfd_mach_msp13;
|
e_set = bfd_mach_msp13;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x14:
|
case E_MSP430_MACH_MSP430x14:
|
e_set = bfd_mach_msp14;
|
e_set = bfd_mach_msp14;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x15:
|
case E_MSP430_MACH_MSP430x15:
|
e_set = bfd_mach_msp15;
|
e_set = bfd_mach_msp15;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x16:
|
case E_MSP430_MACH_MSP430x16:
|
e_set = bfd_mach_msp16;
|
e_set = bfd_mach_msp16;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x31:
|
case E_MSP430_MACH_MSP430x31:
|
e_set = bfd_mach_msp31;
|
e_set = bfd_mach_msp31;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x32:
|
case E_MSP430_MACH_MSP430x32:
|
e_set = bfd_mach_msp32;
|
e_set = bfd_mach_msp32;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x33:
|
case E_MSP430_MACH_MSP430x33:
|
e_set = bfd_mach_msp33;
|
e_set = bfd_mach_msp33;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x41:
|
case E_MSP430_MACH_MSP430x41:
|
e_set = bfd_mach_msp41;
|
e_set = bfd_mach_msp41;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x42:
|
case E_MSP430_MACH_MSP430x42:
|
e_set = bfd_mach_msp42;
|
e_set = bfd_mach_msp42;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x43:
|
case E_MSP430_MACH_MSP430x43:
|
e_set = bfd_mach_msp43;
|
e_set = bfd_mach_msp43;
|
break;
|
break;
|
|
|
case E_MSP430_MACH_MSP430x44:
|
case E_MSP430_MACH_MSP430x44:
|
e_set = bfd_mach_msp44;
|
e_set = bfd_mach_msp44;
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
|
return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
|
}
|
}
|
|
|
/* These functions handle relaxing for the msp430.
|
/* These functions handle relaxing for the msp430.
|
Relaxation required only in two cases:
|
Relaxation required only in two cases:
|
- Bad hand coding like jumps from one section to another or
|
- Bad hand coding like jumps from one section to another or
|
from file to file.
|
from file to file.
|
- Sibling calls. This will affect onlu 'jump label' polymorph. Without
|
- Sibling calls. This will affect onlu 'jump label' polymorph. Without
|
relaxing this enlarges code by 2 bytes. Sibcalls implemented but
|
relaxing this enlarges code by 2 bytes. Sibcalls implemented but
|
do not work in gcc's port by the reason I do not know.
|
do not work in gcc's port by the reason I do not know.
|
Anyway, if a relaxation required, user should pass -relax option to the
|
Anyway, if a relaxation required, user should pass -relax option to the
|
linker.
|
linker.
|
|
|
There are quite a few relaxing opportunities available on the msp430:
|
There are quite a few relaxing opportunities available on the msp430:
|
|
|
================================================================
|
================================================================
|
|
|
1. 3 words -> 1 word
|
1. 3 words -> 1 word
|
|
|
eq == jeq label jne +4; br lab
|
eq == jeq label jne +4; br lab
|
ne != jne label jeq +4; br lab
|
ne != jne label jeq +4; br lab
|
lt < jl label jge +4; br lab
|
lt < jl label jge +4; br lab
|
ltu < jlo label lhs +4; br lab
|
ltu < jlo label lhs +4; br lab
|
ge >= jge label jl +4; br lab
|
ge >= jge label jl +4; br lab
|
geu >= jhs label jlo +4; br lab
|
geu >= jhs label jlo +4; br lab
|
|
|
2. 4 words -> 1 word
|
2. 4 words -> 1 word
|
|
|
ltn < jn jn +2; jmp +4; br lab
|
ltn < jn jn +2; jmp +4; br lab
|
|
|
3. 4 words -> 2 words
|
3. 4 words -> 2 words
|
|
|
gt > jeq +2; jge label jeq +6; jl +4; br label
|
gt > jeq +2; jge label jeq +6; jl +4; br label
|
gtu > jeq +2; jhs label jeq +6; jlo +4; br label
|
gtu > jeq +2; jhs label jeq +6; jlo +4; br label
|
|
|
4. 4 words -> 2 words and 2 labels
|
4. 4 words -> 2 words and 2 labels
|
|
|
leu <= jeq label; jlo label jeq +2; jhs +4; br label
|
leu <= jeq label; jlo label jeq +2; jhs +4; br label
|
le <= jeq label; jl label jeq +2; jge +4; br label
|
le <= jeq label; jl label jeq +2; jge +4; br label
|
=================================================================
|
=================================================================
|
|
|
codemap for first cases is (labels masked ):
|
codemap for first cases is (labels masked ):
|
eq: 0x2002,0x4010,0x0000 -> 0x2400
|
eq: 0x2002,0x4010,0x0000 -> 0x2400
|
ne: 0x2402,0x4010,0x0000 -> 0x2000
|
ne: 0x2402,0x4010,0x0000 -> 0x2000
|
lt: 0x3402,0x4010,0x0000 -> 0x3800
|
lt: 0x3402,0x4010,0x0000 -> 0x3800
|
ltu: 0x2c02,0x4010,0x0000 -> 0x2800
|
ltu: 0x2c02,0x4010,0x0000 -> 0x2800
|
ge: 0x3802,0x4010,0x0000 -> 0x3400
|
ge: 0x3802,0x4010,0x0000 -> 0x3400
|
geu: 0x2802,0x4010,0x0000 -> 0x2c00
|
geu: 0x2802,0x4010,0x0000 -> 0x2c00
|
|
|
second case:
|
second case:
|
ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
|
ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
|
|
|
third case:
|
third case:
|
gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
|
gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
|
gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
|
gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
|
|
|
fourth case:
|
fourth case:
|
leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
|
leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
|
le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
|
le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
|
|
|
Unspecified case :)
|
Unspecified case :)
|
jump: 0x4010,0x0000 -> 0x3c00. */
|
jump: 0x4010,0x0000 -> 0x3c00. */
|
|
|
#define NUMB_RELAX_CODES 12
|
#define NUMB_RELAX_CODES 12
|
static struct rcodes_s
|
static struct rcodes_s
|
{
|
{
|
int f0, f1; /* From code. */
|
int f0, f1; /* From code. */
|
int t0, t1; /* To code. */
|
int t0, t1; /* To code. */
|
int labels; /* Position of labels: 1 - one label at first
|
int labels; /* Position of labels: 1 - one label at first
|
word, 2 - one at second word, 3 - two
|
word, 2 - one at second word, 3 - two
|
labels at both. */
|
labels at both. */
|
int cdx; /* Words to match. */
|
int cdx; /* Words to match. */
|
int bs; /* Shrink bytes. */
|
int bs; /* Shrink bytes. */
|
int off; /* Offset from old label for new code. */
|
int off; /* Offset from old label for new code. */
|
int ncl; /* New code length. */
|
int ncl; /* New code length. */
|
} rcode[] =
|
} rcode[] =
|
{/* lab,cdx,bs,off,ncl */
|
{/* lab,cdx,bs,off,ncl */
|
{ 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
|
{ 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
|
{ 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
|
{ 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
|
{ 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
|
{ 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
|
{ 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
|
{ 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
|
{ 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
|
{ 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
|
{ 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
|
{ 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
|
{ 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
|
{ 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
|
{ 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
|
{ 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
|
{ 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
|
{ 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
|
{ 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
|
{ 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
|
{ 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
|
{ 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
|
{ 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
|
{ 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0}
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0}
|
};
|
};
|
|
|
/* Return TRUE if a symbol exists at the given address. */
|
/* Return TRUE if a symbol exists at the given address. */
|
|
|
static bfd_boolean
|
static bfd_boolean
|
msp430_elf_symbol_address_p (bfd * abfd,
|
msp430_elf_symbol_address_p (bfd * abfd,
|
asection * sec,
|
asection * sec,
|
Elf_Internal_Sym * isym,
|
Elf_Internal_Sym * isym,
|
bfd_vma addr)
|
bfd_vma addr)
|
{
|
{
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
unsigned int sec_shndx;
|
unsigned int sec_shndx;
|
Elf_Internal_Sym *isymend;
|
Elf_Internal_Sym *isymend;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **end_hashes;
|
struct elf_link_hash_entry **end_hashes;
|
unsigned int symcount;
|
unsigned int symcount;
|
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
|
/* Examine all the local symbols. */
|
/* Examine all the local symbols. */
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
if (isym->st_shndx == sec_shndx && isym->st_value == addr)
|
if (isym->st_shndx == sec_shndx && isym->st_value == addr)
|
return TRUE;
|
return TRUE;
|
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
- symtab_hdr->sh_info);
|
- symtab_hdr->sh_info);
|
sym_hashes = elf_sym_hashes (abfd);
|
sym_hashes = elf_sym_hashes (abfd);
|
end_hashes = sym_hashes + symcount;
|
end_hashes = sym_hashes + symcount;
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
{
|
{
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
&& sym_hash->root.u.def.section == sec
|
&& sym_hash->root.u.def.section == sec
|
&& sym_hash->root.u.def.value == addr)
|
&& sym_hash->root.u.def.value == addr)
|
return TRUE;
|
return TRUE;
|
}
|
}
|
|
|
return FALSE;
|
return FALSE;
|
}
|
}
|
|
|
/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has sec_shndx)
|
/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has sec_shndx)
|
referenced from current and other sections */
|
referenced from current and other sections */
|
static bfd_boolean
|
static bfd_boolean
|
msp430_elf_relax_adjust_locals(bfd * abfd, asection * sec, bfd_vma addr,
|
msp430_elf_relax_adjust_locals(bfd * abfd, asection * sec, bfd_vma addr,
|
int count, unsigned int sec_shndx, bfd_vma toaddr)
|
int count, unsigned int sec_shndx, bfd_vma toaddr)
|
{
|
{
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Rela *irel;
|
Elf_Internal_Rela *irel;
|
Elf_Internal_Rela *irelend;
|
Elf_Internal_Rela *irelend;
|
Elf_Internal_Sym *isym;
|
Elf_Internal_Sym *isym;
|
|
|
irel = elf_section_data (sec)->relocs;
|
irel = elf_section_data (sec)->relocs;
|
irelend = irel + sec->reloc_count;
|
irelend = irel + sec->reloc_count;
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
{
|
{
|
int sidx = ELF32_R_SYM(irel->r_info);
|
int sidx = ELF32_R_SYM(irel->r_info);
|
Elf_Internal_Sym *lsym = isym + sidx;
|
Elf_Internal_Sym *lsym = isym + sidx;
|
|
|
/* Adjust symbols referenced by .sec+0xXX */
|
/* Adjust symbols referenced by .sec+0xXX */
|
if (irel->r_addend > addr && irel->r_addend < toaddr
|
if (irel->r_addend > addr && irel->r_addend < toaddr
|
&& lsym->st_shndx == sec_shndx)
|
&& lsym->st_shndx == sec_shndx)
|
irel->r_addend -= count;
|
irel->r_addend -= count;
|
}
|
}
|
|
|
return TRUE;
|
return TRUE;
|
}
|
}
|
|
|
/* Delete some bytes from a section while relaxing. */
|
/* Delete some bytes from a section while relaxing. */
|
|
|
static bfd_boolean
|
static bfd_boolean
|
msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
|
msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
|
int count)
|
int count)
|
{
|
{
|
Elf_Internal_Shdr *symtab_hdr;
|
Elf_Internal_Shdr *symtab_hdr;
|
unsigned int sec_shndx;
|
unsigned int sec_shndx;
|
bfd_byte *contents;
|
bfd_byte *contents;
|
Elf_Internal_Rela *irel;
|
Elf_Internal_Rela *irel;
|
Elf_Internal_Rela *irelend;
|
Elf_Internal_Rela *irelend;
|
Elf_Internal_Rela *irelalign;
|
Elf_Internal_Rela *irelalign;
|
bfd_vma toaddr;
|
bfd_vma toaddr;
|
Elf_Internal_Sym *isym;
|
Elf_Internal_Sym *isym;
|
Elf_Internal_Sym *isymend;
|
Elf_Internal_Sym *isymend;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **sym_hashes;
|
struct elf_link_hash_entry **end_hashes;
|
struct elf_link_hash_entry **end_hashes;
|
unsigned int symcount;
|
unsigned int symcount;
|
asection *p;
|
asection *p;
|
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
/* The deletion must stop at the next ALIGN reloc for an aligment
|
power larger than the number of bytes we are deleting. */
|
power larger than the number of bytes we are deleting. */
|
|
|
irelalign = NULL;
|
irelalign = NULL;
|
toaddr = sec->size;
|
toaddr = sec->size;
|
|
|
irel = elf_section_data (sec)->relocs;
|
irel = elf_section_data (sec)->relocs;
|
irelend = irel + sec->reloc_count;
|
irelend = irel + sec->reloc_count;
|
|
|
/* Actually delete the bytes. */
|
/* Actually delete the bytes. */
|
memmove (contents + addr, contents + addr + count,
|
memmove (contents + addr, contents + addr + count,
|
(size_t) (toaddr - addr - count));
|
(size_t) (toaddr - addr - count));
|
sec->size -= count;
|
sec->size -= count;
|
|
|
/* Adjust all the relocs. */
|
/* Adjust all the relocs. */
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
{
|
{
|
/* Get the new reloc address. */
|
/* Get the new reloc address. */
|
if ((irel->r_offset > addr && irel->r_offset < toaddr))
|
if ((irel->r_offset > addr && irel->r_offset < toaddr))
|
irel->r_offset -= count;
|
irel->r_offset -= count;
|
}
|
}
|
|
|
for (p = abfd->sections; p != NULL; p = p->next)
|
for (p = abfd->sections; p != NULL; p = p->next)
|
msp430_elf_relax_adjust_locals(abfd,p,addr,count,sec_shndx,toaddr);
|
msp430_elf_relax_adjust_locals(abfd,p,addr,count,sec_shndx,toaddr);
|
|
|
/* Adjust the local symbols defined in this section. */
|
/* Adjust the local symbols defined in this section. */
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
if (isym->st_shndx == sec_shndx
|
if (isym->st_shndx == sec_shndx
|
&& isym->st_value > addr && isym->st_value < toaddr)
|
&& isym->st_value > addr && isym->st_value < toaddr)
|
isym->st_value -= count;
|
isym->st_value -= count;
|
|
|
/* Now adjust the global symbols defined in this section. */
|
/* Now adjust the global symbols defined in this section. */
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
- symtab_hdr->sh_info);
|
- symtab_hdr->sh_info);
|
sym_hashes = elf_sym_hashes (abfd);
|
sym_hashes = elf_sym_hashes (abfd);
|
end_hashes = sym_hashes + symcount;
|
end_hashes = sym_hashes + symcount;
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
{
|
{
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
&& sym_hash->root.u.def.section == sec
|
&& sym_hash->root.u.def.section == sec
|
&& sym_hash->root.u.def.value > addr
|
&& sym_hash->root.u.def.value > addr
|
&& sym_hash->root.u.def.value < toaddr)
|
&& sym_hash->root.u.def.value < toaddr)
|
sym_hash->root.u.def.value -= count;
|
sym_hash->root.u.def.value -= count;
|
}
|
}
|
|
|
return TRUE;
|
return TRUE;
|
}
|
}
|
|
|
|
|
static bfd_boolean
|
static bfd_boolean
|
msp430_elf_relax_section (bfd * abfd, asection * sec,
|
msp430_elf_relax_section (bfd * abfd, asection * sec,
|
struct bfd_link_info * link_info,
|
struct bfd_link_info * link_info,
|
bfd_boolean * again)
|
bfd_boolean * again)
|
{
|
{
|
Elf_Internal_Shdr * symtab_hdr;
|
Elf_Internal_Shdr * symtab_hdr;
|
Elf_Internal_Rela * internal_relocs;
|
Elf_Internal_Rela * internal_relocs;
|
Elf_Internal_Rela * irel;
|
Elf_Internal_Rela * irel;
|
Elf_Internal_Rela * irelend;
|
Elf_Internal_Rela * irelend;
|
bfd_byte * contents = NULL;
|
bfd_byte * contents = NULL;
|
Elf_Internal_Sym * isymbuf = NULL;
|
Elf_Internal_Sym * isymbuf = NULL;
|
|
|
/* Assume nothing changes. */
|
/* Assume nothing changes. */
|
*again = FALSE;
|
*again = FALSE;
|
|
|
/* We don't have to do anything for a relocatable link, if
|
/* We don't have to do anything for a relocatable link, if
|
this section does not have relocs, or if this is not a
|
this section does not have relocs, or if this is not a
|
code section. */
|
code section. */
|
if (link_info->relocatable
|
if (link_info->relocatable
|
|| (sec->flags & SEC_RELOC) == 0
|
|| (sec->flags & SEC_RELOC) == 0
|
|| sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
|
|| sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
|
return TRUE;
|
return TRUE;
|
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
|
/* Get a copy of the native relocations. */
|
/* Get a copy of the native relocations. */
|
internal_relocs =
|
internal_relocs =
|
_bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
|
_bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
|
if (internal_relocs == NULL)
|
if (internal_relocs == NULL)
|
goto error_return;
|
goto error_return;
|
|
|
/* Walk through them looking for relaxing opportunities. */
|
/* Walk through them looking for relaxing opportunities. */
|
irelend = internal_relocs + sec->reloc_count;
|
irelend = internal_relocs + sec->reloc_count;
|
for (irel = internal_relocs; irel < irelend; irel++)
|
for (irel = internal_relocs; irel < irelend; irel++)
|
{
|
{
|
bfd_vma symval;
|
bfd_vma symval;
|
|
|
/* If this isn't something that can be relaxed, then ignore
|
/* If this isn't something that can be relaxed, then ignore
|
this reloc. */
|
this reloc. */
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_MSP430_RL_PCREL)
|
if (ELF32_R_TYPE (irel->r_info) != (int) R_MSP430_RL_PCREL)
|
continue;
|
continue;
|
|
|
/* Get the section contents if we haven't done so already. */
|
/* Get the section contents if we haven't done so already. */
|
if (contents == NULL)
|
if (contents == NULL)
|
{
|
{
|
/* Get cached copy if it exists. */
|
/* Get cached copy if it exists. */
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
contents = elf_section_data (sec)->this_hdr.contents;
|
contents = elf_section_data (sec)->this_hdr.contents;
|
else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
goto error_return;
|
goto error_return;
|
}
|
}
|
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
/* Read this BFD's local symbols if we haven't done so already. */
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
{
|
{
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
if (isymbuf == NULL)
|
if (isymbuf == NULL)
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
symtab_hdr->sh_info, 0,
|
symtab_hdr->sh_info, 0,
|
NULL, NULL, NULL);
|
NULL, NULL, NULL);
|
if (isymbuf == NULL)
|
if (isymbuf == NULL)
|
goto error_return;
|
goto error_return;
|
}
|
}
|
|
|
/* Get the value of the symbol referred to by the reloc. */
|
/* Get the value of the symbol referred to by the reloc. */
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
{
|
{
|
/* A local symbol. */
|
/* A local symbol. */
|
Elf_Internal_Sym *isym;
|
Elf_Internal_Sym *isym;
|
asection *sym_sec;
|
asection *sym_sec;
|
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
if (isym->st_shndx == SHN_UNDEF)
|
if (isym->st_shndx == SHN_UNDEF)
|
sym_sec = bfd_und_section_ptr;
|
sym_sec = bfd_und_section_ptr;
|
else if (isym->st_shndx == SHN_ABS)
|
else if (isym->st_shndx == SHN_ABS)
|
sym_sec = bfd_abs_section_ptr;
|
sym_sec = bfd_abs_section_ptr;
|
else if (isym->st_shndx == SHN_COMMON)
|
else if (isym->st_shndx == SHN_COMMON)
|
sym_sec = bfd_com_section_ptr;
|
sym_sec = bfd_com_section_ptr;
|
else
|
else
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
symval = (isym->st_value
|
symval = (isym->st_value
|
+ sym_sec->output_section->vma + sym_sec->output_offset);
|
+ sym_sec->output_section->vma + sym_sec->output_offset);
|
}
|
}
|
else
|
else
|
{
|
{
|
unsigned long indx;
|
unsigned long indx;
|
struct elf_link_hash_entry *h;
|
struct elf_link_hash_entry *h;
|
|
|
/* An external symbol. */
|
/* An external symbol. */
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
h = elf_sym_hashes (abfd)[indx];
|
h = elf_sym_hashes (abfd)[indx];
|
BFD_ASSERT (h != NULL);
|
BFD_ASSERT (h != NULL);
|
|
|
if (h->root.type != bfd_link_hash_defined
|
if (h->root.type != bfd_link_hash_defined
|
&& h->root.type != bfd_link_hash_defweak)
|
&& h->root.type != bfd_link_hash_defweak)
|
/* This appears to be a reference to an undefined
|
/* This appears to be a reference to an undefined
|
symbol. Just ignore it--it will be caught by the
|
symbol. Just ignore it--it will be caught by the
|
regular reloc processing. */
|
regular reloc processing. */
|
continue;
|
continue;
|
|
|
symval = (h->root.u.def.value
|
symval = (h->root.u.def.value
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_section->vma
|
+ h->root.u.def.section->output_offset);
|
+ h->root.u.def.section->output_offset);
|
}
|
}
|
|
|
/* For simplicity of coding, we are going to modify the section
|
/* For simplicity of coding, we are going to modify the section
|
contents, the section relocs, and the BFD symbol table. We
|
contents, the section relocs, and the BFD symbol table. We
|
must tell the rest of the code not to free up this
|
must tell the rest of the code not to free up this
|
information. It would be possible to instead create a table
|
information. It would be possible to instead create a table
|
of changes which have to be made, as is done in coff-mips.c;
|
of changes which have to be made, as is done in coff-mips.c;
|
that would be more work, but would require less memory when
|
that would be more work, but would require less memory when
|
the linker is run. */
|
the linker is run. */
|
|
|
/* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
|
/* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
|
branch. */
|
branch. */
|
/* Paranoia? paranoia... */
|
/* Paranoia? paranoia... */
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
|
if (ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
|
{
|
{
|
bfd_vma value = symval;
|
bfd_vma value = symval;
|
|
|
/* Deal with pc-relative gunk. */
|
/* Deal with pc-relative gunk. */
|
value -= (sec->output_section->vma + sec->output_offset);
|
value -= (sec->output_section->vma + sec->output_offset);
|
value -= irel->r_offset;
|
value -= irel->r_offset;
|
value += irel->r_addend;
|
value += irel->r_addend;
|
|
|
/* See if the value will fit in 10 bits, note the high value is
|
/* See if the value will fit in 10 bits, note the high value is
|
1016 as the target will be two bytes closer if we are
|
1016 as the target will be two bytes closer if we are
|
able to relax. */
|
able to relax. */
|
if ((long) value < 1016 && (long) value > -1016)
|
if ((long) value < 1016 && (long) value > -1016)
|
{
|
{
|
int code0 = 0, code1 = 0, code2 = 0;
|
int code0 = 0, code1 = 0, code2 = 0;
|
int i;
|
int i;
|
struct rcodes_s *rx;
|
struct rcodes_s *rx;
|
|
|
/* Get the opcode. */
|
/* Get the opcode. */
|
if (irel->r_offset >= 6)
|
if (irel->r_offset >= 6)
|
code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
|
code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
|
|
|
if (irel->r_offset >= 4)
|
if (irel->r_offset >= 4)
|
code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
|
code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
|
|
|
code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
|
code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
|
|
|
if (code2 != 0x4010)
|
if (code2 != 0x4010)
|
continue;
|
continue;
|
|
|
/* Check r4 and r3. */
|
/* Check r4 and r3. */
|
for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
|
for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
|
{
|
{
|
rx = &rcode[i];
|
rx = &rcode[i];
|
if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
|
if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
|
break;
|
break;
|
else if (rx->cdx == 1 && rx->f1 == code1)
|
else if (rx->cdx == 1 && rx->f1 == code1)
|
break;
|
break;
|
else if (rx->cdx == 0) /* This is an unconditional jump. */
|
else if (rx->cdx == 0) /* This is an unconditional jump. */
|
break;
|
break;
|
}
|
}
|
|
|
/* Check labels:
|
/* Check labels:
|
.Label0: ; we do not care about this label
|
.Label0: ; we do not care about this label
|
jeq +6
|
jeq +6
|
.Label1: ; make sure there is no label here
|
.Label1: ; make sure there is no label here
|
jl +4
|
jl +4
|
.Label2: ; make sure there is no label here
|
.Label2: ; make sure there is no label here
|
br .Label_dst
|
br .Label_dst
|
|
|
So, if there is .Label1 or .Label2 we cannot relax this code.
|
So, if there is .Label1 or .Label2 we cannot relax this code.
|
This actually should not happen, cause for relaxable
|
This actually should not happen, cause for relaxable
|
instructions we use RL_PCREL reloc instead of 16_PCREL.
|
instructions we use RL_PCREL reloc instead of 16_PCREL.
|
Will change this in the future. */
|
Will change this in the future. */
|
|
|
if (rx->cdx > 0
|
if (rx->cdx > 0
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
irel->r_offset - 2))
|
irel->r_offset - 2))
|
continue;
|
continue;
|
if (rx->cdx > 1
|
if (rx->cdx > 1
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
irel->r_offset - 4))
|
irel->r_offset - 4))
|
continue;
|
continue;
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
/* Note that we've changed the relocs, section contents, etc. */
|
elf_section_data (sec)->relocs = internal_relocs;
|
elf_section_data (sec)->relocs = internal_relocs;
|
elf_section_data (sec)->this_hdr.contents = contents;
|
elf_section_data (sec)->this_hdr.contents = contents;
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
/* Fix the relocation's type. */
|
/* Fix the relocation's type. */
|
if (rx->labels == 3) /* Handle special cases. */
|
if (rx->labels == 3) /* Handle special cases. */
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
R_MSP430_2X_PCREL);
|
R_MSP430_2X_PCREL);
|
else
|
else
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
R_MSP430_10_PCREL);
|
R_MSP430_10_PCREL);
|
|
|
/* Fix the opcode right way. */
|
/* Fix the opcode right way. */
|
bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
|
bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
|
if (rx->t1)
|
if (rx->t1)
|
bfd_put_16 (abfd, rx->t1,
|
bfd_put_16 (abfd, rx->t1,
|
contents + irel->r_offset - rx->off + 2);
|
contents + irel->r_offset - rx->off + 2);
|
|
|
/* Delete bytes. */
|
/* Delete bytes. */
|
if (!msp430_elf_relax_delete_bytes (abfd, sec,
|
if (!msp430_elf_relax_delete_bytes (abfd, sec,
|
irel->r_offset - rx->off +
|
irel->r_offset - rx->off +
|
rx->ncl, rx->bs))
|
rx->ncl, rx->bs))
|
goto error_return;
|
goto error_return;
|
|
|
/* Handle unconditional jumps. */
|
/* Handle unconditional jumps. */
|
if (rx->cdx == 0)
|
if (rx->cdx == 0)
|
irel->r_offset -= 2;
|
irel->r_offset -= 2;
|
|
|
/* That will change things, so, we should relax again.
|
/* That will change things, so, we should relax again.
|
Note that this is not required, and it may be slow. */
|
Note that this is not required, and it may be slow. */
|
*again = TRUE;
|
*again = TRUE;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
{
|
{
|
if (!link_info->keep_memory)
|
if (!link_info->keep_memory)
|
free (isymbuf);
|
free (isymbuf);
|
else
|
else
|
{
|
{
|
/* Cache the symbols for elf_link_input_bfd. */
|
/* Cache the symbols for elf_link_input_bfd. */
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
}
|
}
|
}
|
}
|
|
|
if (contents != NULL
|
if (contents != NULL
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
{
|
{
|
if (!link_info->keep_memory)
|
if (!link_info->keep_memory)
|
free (contents);
|
free (contents);
|
else
|
else
|
{
|
{
|
/* Cache the section contents for elf_link_input_bfd. */
|
/* Cache the section contents for elf_link_input_bfd. */
|
elf_section_data (sec)->this_hdr.contents = contents;
|
elf_section_data (sec)->this_hdr.contents = contents;
|
}
|
}
|
}
|
}
|
|
|
if (internal_relocs != NULL
|
if (internal_relocs != NULL
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
free (internal_relocs);
|
free (internal_relocs);
|
|
|
return TRUE;
|
return TRUE;
|
|
|
error_return:
|
error_return:
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
free (isymbuf);
|
free (isymbuf);
|
if (contents != NULL
|
if (contents != NULL
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
free (contents);
|
free (contents);
|
if (internal_relocs != NULL
|
if (internal_relocs != NULL
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
free (internal_relocs);
|
free (internal_relocs);
|
|
|
return FALSE;
|
return FALSE;
|
}
|
}
|
|
|
|
|
#define ELF_ARCH bfd_arch_msp430
|
#define ELF_ARCH bfd_arch_msp430
|
#define ELF_MACHINE_CODE EM_MSP430
|
#define ELF_MACHINE_CODE EM_MSP430
|
#define ELF_MACHINE_ALT1 EM_MSP430_OLD
|
#define ELF_MACHINE_ALT1 EM_MSP430_OLD
|
#define ELF_MAXPAGESIZE 1
|
#define ELF_MAXPAGESIZE 1
|
#define ELF_OSABI ELFOSABI_STANDALONE
|
#define ELF_OSABI ELFOSABI_STANDALONE
|
|
|
#define TARGET_LITTLE_SYM bfd_elf32_msp430_vec
|
#define TARGET_LITTLE_SYM bfd_elf32_msp430_vec
|
#define TARGET_LITTLE_NAME "elf32-msp430"
|
#define TARGET_LITTLE_NAME "elf32-msp430"
|
|
|
#define elf_info_to_howto msp430_info_to_howto_rela
|
#define elf_info_to_howto msp430_info_to_howto_rela
|
#define elf_info_to_howto_rel NULL
|
#define elf_info_to_howto_rel NULL
|
#define elf_backend_relocate_section elf32_msp430_relocate_section
|
#define elf_backend_relocate_section elf32_msp430_relocate_section
|
#define elf_backend_check_relocs elf32_msp430_check_relocs
|
#define elf_backend_check_relocs elf32_msp430_check_relocs
|
#define elf_backend_can_gc_sections 1
|
#define elf_backend_can_gc_sections 1
|
#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
|
#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
|
#define elf_backend_object_p elf32_msp430_object_p
|
#define elf_backend_object_p elf32_msp430_object_p
|
#define elf_backend_post_process_headers _bfd_elf_set_osabi
|
#define elf_backend_post_process_headers _bfd_elf_set_osabi
|
#define bfd_elf32_bfd_relax_section msp430_elf_relax_section
|
#define bfd_elf32_bfd_relax_section msp430_elf_relax_section
|
|
|
#include "elf32-target.h"
|
#include "elf32-target.h"
|
|
|
