0f8f0c57ea
PR 17940 * dwarf2dbg.c (out_header): When generating dwarf sections use real symbols not temps for the start and end symbols. * config/tc-msp430.h (TC_FORCE_RELOCATION_SUB_SAME): Also prevent adjustments to relocations in debug sections. (TC_LINKRELAX_FIXUP): Likewise. * elf32-msp430.c (msp430_elf_relax_delete_bytes): Adjust debug symbols at end of sections. Adjust function sizes.
2579 lines
78 KiB
C
2579 lines
78 KiB
C
/* MSP430-specific support for 32-bit ELF
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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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 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,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libiberty.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/msp430.h"
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static reloc_howto_type elf_msp430_howto_table[] =
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{
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HOWTO (R_MSP430_NONE, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_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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HOWTO (R_MSP430_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 10 bit PC relative relocation. */
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HOWTO (R_MSP430_10_PCREL, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_10_PCREL", /* name */
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FALSE, /* partial_inplace */
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0x3ff, /* src_mask */
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0x3ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_MSP430_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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 16 bit PC relative relocation for command address. */
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HOWTO (R_MSP430_16_PCREL, /* type */
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1, /* rightshift */
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1, /* 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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_PCREL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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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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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_BYTE", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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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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1, /* rightshift */
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1, /* 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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_16_PCREL_BYTE",/* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 10 bit PC relative relocation for complicated polymorphs. */
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HOWTO (R_MSP430_2X_PCREL, /* type */
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1, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_2X_PCREL", /* name */
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FALSE, /* partial_inplace */
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0x3ff, /* src_mask */
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0x3ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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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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1, /* rightshift */
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1, /* 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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_RL_PCREL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE) /* pcrel_offset */
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/* A 8-bit absolute relocation. */
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, HOWTO (R_MSP430_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Together with a following reloc, allows for the difference
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between two symbols to be the real addend of the second reloc. */
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HOWTO (R_MSP430_SYM_DIFF, /* 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_dont,/* complain_on_overflow */
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NULL, /* special handler. */
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"R_MSP430_SYM_DIFF", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE) /* pcrel_offset */
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};
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static reloc_howto_type elf_msp430x_howto_table[] =
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{
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HOWTO (R_MSP430_NONE, /* type */
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0, /* rightshift */
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3, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_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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HOWTO (R_MSP430_ABS32, /* 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_MSP430_ABS32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_MSP430_ABS16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_ABS16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_MSP430_ABS8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_ABS8", /* name */
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FALSE, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_MSP430_PCR16, /* type */
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1, /* rightshift */
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1, /* 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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_PCR16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_PCR20_EXT_SRC",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_PCR20_EXT_DST",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_PCR20_EXT_ODST",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS20_EXT_SRC",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS20_EXT_DST",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS20_EXT_ODST",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS20_ADR_SRC",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS20_ADR_DST",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_PCR16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_PCR16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_PCR20_CALL, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_PCR20_CALL",/* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430X_ABS16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430X_ABS16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430_ABS_HI16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_ABS_HI16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_MSP430_PREL31, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MSP430_PREL31", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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EMPTY_HOWTO (R_MSP430_EHTYPE),
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/* A 10 bit PC relative relocation. */
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HOWTO (R_MSP430X_10_PCREL, /* type */
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1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
10, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_MSP430X_10_PCREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3ff, /* src_mask */
|
|
0x3ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* A 10 bit PC relative relocation for complicated polymorphs. */
|
|
HOWTO (R_MSP430X_2X_PCREL, /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
10, /* bitsize */
|
|
TRUE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_MSP430X_2X_PCREL", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0x3ff, /* src_mask */
|
|
0x3ff, /* dst_mask */
|
|
TRUE), /* pcrel_offset */
|
|
|
|
/* Together with a following reloc, allows for the difference
|
|
between two symbols to be the real addend of the second reloc. */
|
|
HOWTO (R_MSP430X_SYM_DIFF, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
FALSE, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
NULL, /* special handler. */
|
|
"R_MSP430X_SYM_DIFF", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE) /* pcrel_offset */
|
|
};
|
|
|
|
/* Map BFD reloc types to MSP430 ELF reloc types. */
|
|
|
|
struct msp430_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned int elf_reloc_val;
|
|
};
|
|
|
|
static const struct msp430_reloc_map msp430_reloc_map[] =
|
|
{
|
|
{BFD_RELOC_NONE, R_MSP430_NONE},
|
|
{BFD_RELOC_32, R_MSP430_32},
|
|
{BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
|
|
{BFD_RELOC_16, R_MSP430_16_BYTE},
|
|
{BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
|
|
{BFD_RELOC_MSP430_16, R_MSP430_16},
|
|
{BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
|
|
{BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
|
|
{BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
|
|
{BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL},
|
|
{BFD_RELOC_8, R_MSP430_8},
|
|
{BFD_RELOC_MSP430_SYM_DIFF, R_MSP430_SYM_DIFF}
|
|
};
|
|
|
|
static const struct msp430_reloc_map msp430x_reloc_map[] =
|
|
{
|
|
{BFD_RELOC_NONE, R_MSP430_NONE},
|
|
{BFD_RELOC_32, R_MSP430_ABS32},
|
|
{BFD_RELOC_16, R_MSP430_ABS16},
|
|
{BFD_RELOC_8, R_MSP430_ABS8},
|
|
{BFD_RELOC_MSP430_ABS8, R_MSP430_ABS8},
|
|
{BFD_RELOC_MSP430X_PCR20_EXT_SRC, R_MSP430X_PCR20_EXT_SRC},
|
|
{BFD_RELOC_MSP430X_PCR20_EXT_DST, R_MSP430X_PCR20_EXT_DST},
|
|
{BFD_RELOC_MSP430X_PCR20_EXT_ODST, R_MSP430X_PCR20_EXT_ODST},
|
|
{BFD_RELOC_MSP430X_ABS20_EXT_SRC, R_MSP430X_ABS20_EXT_SRC},
|
|
{BFD_RELOC_MSP430X_ABS20_EXT_DST, R_MSP430X_ABS20_EXT_DST},
|
|
{BFD_RELOC_MSP430X_ABS20_EXT_ODST, R_MSP430X_ABS20_EXT_ODST},
|
|
{BFD_RELOC_MSP430X_ABS20_ADR_SRC, R_MSP430X_ABS20_ADR_SRC},
|
|
{BFD_RELOC_MSP430X_ABS20_ADR_DST, R_MSP430X_ABS20_ADR_DST},
|
|
{BFD_RELOC_MSP430X_PCR16, R_MSP430X_PCR16},
|
|
{BFD_RELOC_MSP430X_PCR20_CALL, R_MSP430X_PCR20_CALL},
|
|
{BFD_RELOC_MSP430X_ABS16, R_MSP430X_ABS16},
|
|
{BFD_RELOC_MSP430_ABS_HI16, R_MSP430_ABS_HI16},
|
|
{BFD_RELOC_MSP430_PREL31, R_MSP430_PREL31},
|
|
{BFD_RELOC_MSP430_10_PCREL, R_MSP430X_10_PCREL},
|
|
{BFD_RELOC_MSP430_2X_PCREL, R_MSP430X_2X_PCREL},
|
|
{BFD_RELOC_MSP430_RL_PCREL, R_MSP430X_PCR16},
|
|
{BFD_RELOC_MSP430_SYM_DIFF, R_MSP430X_SYM_DIFF}
|
|
};
|
|
|
|
static inline bfd_boolean
|
|
uses_msp430x_relocs (bfd * abfd)
|
|
{
|
|
extern const bfd_target msp430_elf32_ti_vec;
|
|
|
|
return bfd_get_mach (abfd) == bfd_mach_msp430x
|
|
|| abfd->xvec == & msp430_elf32_ti_vec;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
for (i = ARRAY_SIZE (msp430x_reloc_map); i--;)
|
|
if (msp430x_reloc_map[i].bfd_reloc_val == code)
|
|
return elf_msp430x_howto_table + msp430x_reloc_map[i].elf_reloc_val;
|
|
}
|
|
else
|
|
{
|
|
for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
|
|
if (msp430_reloc_map[i].bfd_reloc_val == code)
|
|
return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
for (i = ARRAY_SIZE (elf_msp430x_howto_table); i--;)
|
|
if (elf_msp430x_howto_table[i].name != NULL
|
|
&& strcasecmp (elf_msp430x_howto_table[i].name, r_name) == 0)
|
|
return elf_msp430x_howto_table + i;
|
|
}
|
|
else
|
|
{
|
|
for (i = 0;
|
|
i < (sizeof (elf_msp430_howto_table)
|
|
/ sizeof (elf_msp430_howto_table[0]));
|
|
i++)
|
|
if (elf_msp430_howto_table[i].name != NULL
|
|
&& strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
|
|
return &elf_msp430_howto_table[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Set the howto pointer for an MSP430 ELF reloc. */
|
|
|
|
static void
|
|
msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
|
|
arelent * cache_ptr,
|
|
Elf_Internal_Rela * dst)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
|
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
if (r_type >= (unsigned int) R_MSP430x_max)
|
|
{
|
|
_bfd_error_handler (_("%B: invalid MSP430X reloc number: %d"), abfd, r_type);
|
|
r_type = 0;
|
|
}
|
|
cache_ptr->howto = elf_msp430x_howto_table + r_type;
|
|
return;
|
|
}
|
|
|
|
if (r_type >= (unsigned int) R_MSP430_max)
|
|
{
|
|
_bfd_error_handler (_("%B: invalid MSP430 reloc number: %d"), abfd, r_type);
|
|
r_type = 0;
|
|
}
|
|
cache_ptr->howto = &elf_msp430_howto_table[r_type];
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase.
|
|
Since we don't do .gots or .plts, we just need to consider the
|
|
virtual table relocs for gc. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
|
|
asection * sec, const Elf_Internal_Rela * relocs)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
unsigned long r_symndx;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
h = NULL;
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
|
|
/* PR15323, ref flags aren't set for references in the same
|
|
object. */
|
|
h->root.non_ir_ref = 1;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Perform a single relocation. By default we use the standard BFD
|
|
routines, but a few relocs, we have to do them ourselves. */
|
|
|
|
static bfd_reloc_status_type
|
|
msp430_final_link_relocate (reloc_howto_type * howto,
|
|
bfd * input_bfd,
|
|
asection * input_section,
|
|
bfd_byte * contents,
|
|
Elf_Internal_Rela * rel,
|
|
bfd_vma relocation,
|
|
struct bfd_link_info * info)
|
|
{
|
|
static asection * sym_diff_section;
|
|
static bfd_vma sym_diff_value;
|
|
|
|
struct bfd_elf_section_data * esd = elf_section_data (input_section);
|
|
bfd_reloc_status_type r = bfd_reloc_ok;
|
|
bfd_vma x;
|
|
bfd_signed_vma srel;
|
|
bfd_boolean is_rel_reloc = FALSE;
|
|
|
|
if (uses_msp430x_relocs (input_bfd))
|
|
{
|
|
/* See if we have a REL type relocation. */
|
|
is_rel_reloc = (esd->rel.hdr != NULL);
|
|
/* Sanity check - only one type of relocation per section.
|
|
FIXME: Theoretically it is possible to have both types,
|
|
but if that happens how can we distinguish between the two ? */
|
|
BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr);
|
|
/* If we are using a REL relocation then the addend should be empty. */
|
|
BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0);
|
|
}
|
|
|
|
if (sym_diff_section != NULL)
|
|
{
|
|
BFD_ASSERT (sym_diff_section == input_section);
|
|
|
|
if (uses_msp430x_relocs (input_bfd))
|
|
switch (howto->type)
|
|
{
|
|
case R_MSP430_ABS32:
|
|
/* If we are computing a 32-bit value for the location lists
|
|
and the result is 0 then we add one to the value. A zero
|
|
value can result because of linker relaxation deleteing
|
|
prologue instructions and using a value of 1 (for the begin
|
|
and end offsets in the location list entry) results in a
|
|
nul entry which does not prevent the following entries from
|
|
being parsed. */
|
|
if (relocation == sym_diff_value
|
|
&& strcmp (input_section->name, ".debug_loc") == 0)
|
|
++ relocation;
|
|
/* Fall through. */
|
|
case R_MSP430_ABS16:
|
|
case R_MSP430X_ABS16:
|
|
case R_MSP430_ABS8:
|
|
BFD_ASSERT (! is_rel_reloc);
|
|
relocation -= sym_diff_value;
|
|
break;
|
|
|
|
default:
|
|
return bfd_reloc_dangerous;
|
|
}
|
|
else
|
|
switch (howto->type)
|
|
{
|
|
case R_MSP430_32:
|
|
case R_MSP430_16:
|
|
case R_MSP430_16_BYTE:
|
|
case R_MSP430_8:
|
|
relocation -= sym_diff_value;
|
|
break;
|
|
|
|
default:
|
|
return bfd_reloc_dangerous;
|
|
}
|
|
|
|
sym_diff_section = NULL;
|
|
}
|
|
|
|
if (uses_msp430x_relocs (input_bfd))
|
|
switch (howto->type)
|
|
{
|
|
case R_MSP430X_SYM_DIFF:
|
|
/* Cache the input section and value.
|
|
The offset is unreliable, since relaxation may
|
|
have reduced the following reloc's offset. */
|
|
BFD_ASSERT (! is_rel_reloc);
|
|
sym_diff_section = input_section;
|
|
sym_diff_value = relocation;
|
|
return bfd_reloc_ok;
|
|
|
|
case R_MSP430_ABS16:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents);
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430X_10_PCREL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents) & 0x3ff;
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* MSP430 addresses commands as words. */
|
|
srel >>= 1;
|
|
|
|
/* Check for an overflow. */
|
|
if (srel < -512 || srel > 511)
|
|
{
|
|
if (info->disable_target_specific_optimizations < 0)
|
|
{
|
|
static bfd_boolean warned = FALSE;
|
|
if (! warned)
|
|
{
|
|
info->callbacks->warning
|
|
(info,
|
|
_("Try enabling relaxation to avoid relocation truncations"),
|
|
NULL, input_bfd, input_section, relocation);
|
|
warned = TRUE;
|
|
}
|
|
}
|
|
return bfd_reloc_overflow;
|
|
}
|
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_PCR20_EXT_ODST:
|
|
/* [0,4]+[48,16] = ---F ---- FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
|
|
addend |= bfd_get_16 (input_bfd, contents+4);
|
|
srel += addend;
|
|
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | ((srel >> 16) & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS20_EXT_SRC:
|
|
/* [7,4]+[32,16] = -78- FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = (bfd_get_16 (input_bfd, contents) & 0x0780) << 9;
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf87f) | ((srel << 7) & 0x0780);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430_16_PCREL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents);
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
/* Only branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430X_PCR20_EXT_DST:
|
|
/* [0,4]+[32,16] = ---F FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | (srel & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_PCR20_EXT_SRC:
|
|
/* [7,4]+32,16] = -78- FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = ((bfd_get_16 (input_bfd, contents) & 0x0780) << 9);
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
/* Only branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf87f) | ((srel << 7) & 0x0780);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430_ABS8:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_8 (input_bfd, contents);
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_8 (input_bfd, srel & 0xff, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS20_EXT_DST:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents) & 0xf;
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | (srel & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS20_EXT_ODST:
|
|
/* [0,4]+[48,16] = ---F ---- FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
|
|
addend |= bfd_get_16 (input_bfd, contents+4);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | (srel & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS20_ADR_SRC:
|
|
/* [8,4]+[32,16] = -F-- FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
|
|
addend = ((bfd_get_16 (input_bfd, contents) & 0xf00) << 8);
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0ff) | ((srel << 8) & 0x0f00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS20_ADR_DST:
|
|
/* [0,4]+[32,16] = ---F FFFF */
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = ((bfd_get_16 (input_bfd, contents) & 0xf) << 16);
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | (srel & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_ABS16:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents);
|
|
else
|
|
srel += rel->r_addend;
|
|
x = srel;
|
|
if (x > 0xffff)
|
|
return bfd_reloc_overflow;
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_ABS_HI16:
|
|
/* The EABI specifies that this must be a RELA reloc. */
|
|
BFD_ASSERT (! is_rel_reloc);
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, (srel >> 16) & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430X_PCR20_CALL:
|
|
/* [0,4]+[32,16] = ---F FFFF*/
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
{
|
|
bfd_vma addend;
|
|
addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
|
|
addend |= bfd_get_16 (input_bfd, contents+2);
|
|
srel += addend;
|
|
}
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents + 2);
|
|
srel >>= 16;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfff0) | (srel & 0xf);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430X_PCR16:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += bfd_get_16 (input_bfd, contents);
|
|
else
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_PREL31:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
if (is_rel_reloc)
|
|
srel += (bfd_get_32 (input_bfd, contents) & 0x7fffffff);
|
|
else
|
|
srel += rel->r_addend;
|
|
srel += rel->r_addend;
|
|
x = bfd_get_32 (input_bfd, contents);
|
|
x = (x & 0x80000000) | ((srel >> 31) & 0x7fffffff);
|
|
bfd_put_32 (input_bfd, x, contents);
|
|
break;
|
|
|
|
default:
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, rel->r_addend);
|
|
}
|
|
else
|
|
switch (howto->type)
|
|
{
|
|
case R_MSP430_10_PCREL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* MSP430 addresses commands as words. */
|
|
srel >>= 1;
|
|
|
|
/* Check for an overflow. */
|
|
if (srel < -512 || srel > 511)
|
|
{
|
|
if (info->disable_target_specific_optimizations < 0)
|
|
{
|
|
static bfd_boolean warned = FALSE;
|
|
if (! warned)
|
|
{
|
|
info->callbacks->warning
|
|
(info,
|
|
_("Try enabling relaxation to avoid relocation truncations"),
|
|
NULL, input_bfd, input_section, relocation);
|
|
warned = TRUE;
|
|
}
|
|
}
|
|
return bfd_reloc_overflow;
|
|
}
|
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_MSP430_2X_PCREL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
srel -= 2; /* Branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
|
|
/* MSP430 addresses commands as words. */
|
|
srel >>= 1;
|
|
|
|
/* Check for an overflow. */
|
|
if (srel < -512 || srel > 511)
|
|
return bfd_reloc_overflow;
|
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
/* Handle second jump instruction. */
|
|
x = bfd_get_16 (input_bfd, contents - 2);
|
|
srel += 1;
|
|
x = (x & 0xfc00) | (srel & 0x3ff);
|
|
bfd_put_16 (input_bfd, x, contents - 2);
|
|
break;
|
|
|
|
case R_MSP430_RL_PCREL:
|
|
case R_MSP430_16_PCREL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
/* Only branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_16_PCREL_BYTE:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
srel -= rel->r_offset;
|
|
/* Only branch instructions add 2 to the PC... */
|
|
srel -= (input_section->output_section->vma +
|
|
input_section->output_offset);
|
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_16_BYTE:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_16:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
|
|
if (srel & 1)
|
|
return bfd_reloc_notsupported;
|
|
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents);
|
|
break;
|
|
|
|
case R_MSP430_8:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation;
|
|
srel += rel->r_addend;
|
|
|
|
bfd_put_8 (input_bfd, srel & 0xff, contents);
|
|
break;
|
|
|
|
case R_MSP430_SYM_DIFF:
|
|
/* Cache the input section and value.
|
|
The offset is unreliable, since relaxation may
|
|
have reduced the following reloc's offset. */
|
|
sym_diff_section = input_section;
|
|
sym_diff_value = relocation;
|
|
return bfd_reloc_ok;
|
|
|
|
default:
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, rel->r_addend);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Relocate an MSP430 ELF section. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
|
|
struct bfd_link_info * info,
|
|
bfd * input_bfd,
|
|
asection * input_section,
|
|
bfd_byte * contents,
|
|
Elf_Internal_Rela * relocs,
|
|
Elf_Internal_Sym * local_syms,
|
|
asection ** local_sections)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
Elf_Internal_Rela *rel;
|
|
Elf_Internal_Rela *relend;
|
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
relend = relocs + input_section->reloc_count;
|
|
|
|
for (rel = relocs; rel < relend; rel++)
|
|
{
|
|
reloc_howto_type *howto;
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym *sym;
|
|
asection *sec;
|
|
struct elf_link_hash_entry *h;
|
|
bfd_vma relocation;
|
|
bfd_reloc_status_type r;
|
|
const char *name = NULL;
|
|
int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
|
|
if (uses_msp430x_relocs (input_bfd))
|
|
howto = elf_msp430x_howto_table + r_type;
|
|
else
|
|
howto = elf_msp430_howto_table + r_type;
|
|
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections[r_symndx];
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
|
|
name = bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
|
name = (name == NULL || * name == 0) ? bfd_section_name (input_bfd, sec) : name;
|
|
}
|
|
else
|
|
{
|
|
bfd_boolean unresolved_reloc, warned, ignored;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned, ignored);
|
|
name = h->root.root.string;
|
|
}
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
if (info->relocatable)
|
|
continue;
|
|
|
|
r = msp430_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel, relocation, info);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char *msg = (const char *) NULL;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
r = info->callbacks->reloc_overflow
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
|
(bfd_vma) 0, input_bfd, input_section,
|
|
rel->r_offset);
|
|
break;
|
|
|
|
case bfd_reloc_undefined:
|
|
r = info->callbacks->undefined_symbol
|
|
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
|
break;
|
|
|
|
case bfd_reloc_outofrange:
|
|
msg = _("internal error: branch/jump to an odd address detected");
|
|
break;
|
|
|
|
case bfd_reloc_notsupported:
|
|
msg = _("internal error: unsupported relocation error");
|
|
break;
|
|
|
|
case bfd_reloc_dangerous:
|
|
msg = _("internal error: dangerous relocation");
|
|
break;
|
|
|
|
default:
|
|
msg = _("internal error: unknown error");
|
|
break;
|
|
}
|
|
|
|
if (msg)
|
|
r = info->callbacks->warning
|
|
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
|
|
|
if (!r)
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* The final processing done just before writing out a MSP430 ELF object
|
|
file. This gets the MSP430 architecture right based on the machine
|
|
number. */
|
|
|
|
static void
|
|
bfd_elf_msp430_final_write_processing (bfd * abfd,
|
|
bfd_boolean linker ATTRIBUTE_UNUSED)
|
|
{
|
|
unsigned long val;
|
|
|
|
switch (bfd_get_mach (abfd))
|
|
{
|
|
default:
|
|
case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break;
|
|
case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break;
|
|
case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break;
|
|
case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break;
|
|
case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break;
|
|
case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break;
|
|
case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break;
|
|
case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break;
|
|
case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break;
|
|
case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break;
|
|
case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break;
|
|
case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break;
|
|
case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break;
|
|
case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break;
|
|
case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break;
|
|
case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break;
|
|
case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break;
|
|
case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break;
|
|
case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break;
|
|
case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break;
|
|
case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break;
|
|
case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break;
|
|
case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break;
|
|
}
|
|
|
|
elf_elfheader (abfd)->e_machine = EM_MSP430;
|
|
elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
|
|
elf_elfheader (abfd)->e_flags |= val;
|
|
}
|
|
|
|
/* Set the right machine number. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_object_p (bfd * abfd)
|
|
{
|
|
int e_set = bfd_mach_msp14;
|
|
|
|
if (elf_elfheader (abfd)->e_machine == EM_MSP430
|
|
|| elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
|
|
{
|
|
int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
|
|
|
|
switch (e_mach)
|
|
{
|
|
default:
|
|
case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break;
|
|
case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break;
|
|
case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break;
|
|
case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break;
|
|
case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break;
|
|
case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break;
|
|
case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break;
|
|
case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break;
|
|
case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break;
|
|
case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break;
|
|
case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break;
|
|
case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break;
|
|
case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break;
|
|
case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break;
|
|
case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break;
|
|
case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break;
|
|
case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break;
|
|
case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break;
|
|
case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break;
|
|
case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break;
|
|
case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break;
|
|
case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break;
|
|
case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break;
|
|
}
|
|
}
|
|
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
|
|
}
|
|
|
|
/* These functions handle relaxing for the msp430.
|
|
Relaxation required only in two cases:
|
|
- Bad hand coding like jumps from one section to another or
|
|
from file to file.
|
|
- Sibling calls. This will affect only 'jump label' polymorph. Without
|
|
relaxing this enlarges code by 2 bytes. Sibcalls implemented but
|
|
do not work in gcc's port by the reason I do not know.
|
|
- To convert out of range conditional jump instructions (found inside
|
|
a function) into inverted jumps over an unconditional branch instruction.
|
|
Anyway, if a relaxation required, user should pass -relax option to the
|
|
linker.
|
|
|
|
There are quite a few relaxing opportunities available on the msp430:
|
|
|
|
================================================================
|
|
|
|
1. 3 words -> 1 word
|
|
|
|
eq == jeq label jne +4; br lab
|
|
ne != jne label jeq +4; br lab
|
|
lt < jl label jge +4; br lab
|
|
ltu < jlo label lhs +4; br lab
|
|
ge >= jge label jl +4; br lab
|
|
geu >= jhs label jlo +4; br lab
|
|
|
|
2. 4 words -> 1 word
|
|
|
|
ltn < jn jn +2; jmp +4; br lab
|
|
|
|
3. 4 words -> 2 words
|
|
|
|
gt > jeq +2; jge label jeq +6; jl +4; br label
|
|
gtu > jeq +2; jhs label jeq +6; jlo +4; br label
|
|
|
|
4. 4 words -> 2 words and 2 labels
|
|
|
|
leu <= jeq label; jlo label jeq +2; jhs +4; br label
|
|
le <= jeq label; jl label jeq +2; jge +4; br label
|
|
=================================================================
|
|
|
|
codemap for first cases is (labels masked ):
|
|
eq: 0x2002,0x4010,0x0000 -> 0x2400
|
|
ne: 0x2402,0x4010,0x0000 -> 0x2000
|
|
lt: 0x3402,0x4010,0x0000 -> 0x3800
|
|
ltu: 0x2c02,0x4010,0x0000 -> 0x2800
|
|
ge: 0x3802,0x4010,0x0000 -> 0x3400
|
|
geu: 0x2802,0x4010,0x0000 -> 0x2c00
|
|
|
|
second case:
|
|
ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
|
|
|
|
third case:
|
|
gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
|
|
gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
|
|
|
|
fourth case:
|
|
leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
|
|
le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
|
|
|
|
Unspecified case :)
|
|
jump: 0x4010,0x0000 -> 0x3c00. */
|
|
|
|
#define NUMB_RELAX_CODES 12
|
|
static struct rcodes_s
|
|
{
|
|
int f0, f1; /* From code. */
|
|
int t0, t1; /* To code. */
|
|
int labels; /* Position of labels: 1 - one label at first
|
|
word, 2 - one at second word, 3 - two
|
|
labels at both. */
|
|
int cdx; /* Words to match. */
|
|
int bs; /* Shrink bytes. */
|
|
int off; /* Offset from old label for new code. */
|
|
int ncl; /* New code length. */
|
|
} rcode[] =
|
|
{/* lab,cdx,bs,off,ncl */
|
|
{ 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
|
|
{ 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
|
|
{ 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
|
|
{ 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
|
|
{ 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
|
|
{ 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
|
|
{ 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
|
|
{ 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
|
|
{ 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
|
|
{ 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}, /* le , 2 labels */
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0}
|
|
};
|
|
|
|
/* Return TRUE if a symbol exists at the given address. */
|
|
|
|
static bfd_boolean
|
|
msp430_elf_symbol_address_p (bfd * abfd,
|
|
asection * sec,
|
|
Elf_Internal_Sym * isym,
|
|
bfd_vma addr)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
unsigned int sec_shndx;
|
|
Elf_Internal_Sym *isymend;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_link_hash_entry **end_hashes;
|
|
unsigned int symcount;
|
|
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
|
|
/* Examine all the local symbols. */
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
|
if (isym->st_shndx == sec_shndx && isym->st_value == addr)
|
|
return TRUE;
|
|
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
|
- symtab_hdr->sh_info);
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
end_hashes = sym_hashes + symcount;
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
|
{
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|
&& sym_hash->root.u.def.section == sec
|
|
&& sym_hash->root.u.def.value == addr)
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has
|
|
sec_shndx) referenced from current and other sections. */
|
|
|
|
static bfd_boolean
|
|
msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr,
|
|
int count, unsigned int sec_shndx,
|
|
bfd_vma toaddr)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
Elf_Internal_Rela *irel;
|
|
Elf_Internal_Rela *irelend;
|
|
Elf_Internal_Sym *isym;
|
|
|
|
irel = elf_section_data (sec)->relocs;
|
|
if (irel == NULL)
|
|
return TRUE;
|
|
|
|
irelend = irel + sec->reloc_count;
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
|
|
for (;irel < irelend; irel++)
|
|
{
|
|
unsigned int sidx = ELF32_R_SYM(irel->r_info);
|
|
Elf_Internal_Sym *lsym = isym + sidx;
|
|
|
|
/* Adjust symbols referenced by .sec+0xXX */
|
|
if (irel->r_addend > addr && irel->r_addend < toaddr
|
|
&& sidx < symtab_hdr->sh_info
|
|
&& lsym->st_shndx == sec_shndx)
|
|
irel->r_addend -= count;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Delete some bytes from a section while relaxing. */
|
|
|
|
static bfd_boolean
|
|
msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
|
|
int count)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
unsigned int sec_shndx;
|
|
bfd_byte *contents;
|
|
Elf_Internal_Rela *irel;
|
|
Elf_Internal_Rela *irelend;
|
|
bfd_vma toaddr;
|
|
Elf_Internal_Sym *isym;
|
|
Elf_Internal_Sym *isymend;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_link_hash_entry **end_hashes;
|
|
unsigned int symcount;
|
|
asection *p;
|
|
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
|
|
toaddr = sec->size;
|
|
|
|
irel = elf_section_data (sec)->relocs;
|
|
irelend = irel + sec->reloc_count;
|
|
|
|
/* Actually delete the bytes. */
|
|
memmove (contents + addr, contents + addr + count,
|
|
(size_t) (toaddr - addr - count));
|
|
sec->size -= count;
|
|
|
|
/* Adjust all the relocs. */
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
for (; irel < irelend; irel++)
|
|
{
|
|
/* Get the new reloc address. */
|
|
if ((irel->r_offset > addr && irel->r_offset < toaddr))
|
|
irel->r_offset -= count;
|
|
}
|
|
|
|
for (p = abfd->sections; p != NULL; p = p->next)
|
|
msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr);
|
|
|
|
/* Adjust the local symbols defined in this section. */
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
|
{
|
|
const char * name;
|
|
|
|
name = bfd_elf_string_from_elf_section
|
|
(abfd, symtab_hdr->sh_link, isym->st_name);
|
|
name = (name == NULL || * name == 0) ? bfd_section_name (abfd, sec) : name;
|
|
|
|
if (isym->st_shndx != sec_shndx)
|
|
continue;
|
|
|
|
if (isym->st_value > addr
|
|
&& (isym->st_value < toaddr
|
|
/* We also adjust a symbol at the end of the section if its name is
|
|
on the list below. These symbols are used for debug info
|
|
generation and they refer to the end of the current section, not
|
|
the start of the next section. */
|
|
|| (isym->st_value == toaddr
|
|
&& name != NULL
|
|
&& (CONST_STRNEQ (name, ".Letext")
|
|
|| CONST_STRNEQ (name, ".LFE")))))
|
|
{
|
|
if (isym->st_value < addr + count)
|
|
isym->st_value = addr;
|
|
else
|
|
isym->st_value -= count;
|
|
}
|
|
/* Adjust the function symbol's size as well. */
|
|
else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC
|
|
&& isym->st_value + isym->st_size > addr
|
|
&& isym->st_value + isym->st_size < toaddr)
|
|
isym->st_size -= count;
|
|
}
|
|
|
|
/* Now adjust the global symbols defined in this section. */
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
|
- symtab_hdr->sh_info);
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
end_hashes = sym_hashes + symcount;
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
|
{
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|
&& sym_hash->root.u.def.section == sec
|
|
&& sym_hash->root.u.def.value > addr
|
|
&& sym_hash->root.u.def.value < toaddr)
|
|
{
|
|
if (sym_hash->root.u.def.value < addr + count)
|
|
sym_hash->root.u.def.value = addr;
|
|
else
|
|
sym_hash->root.u.def.value -= count;
|
|
}
|
|
/* Adjust the function symbol's size as well. */
|
|
else if (sym_hash->root.type == bfd_link_hash_defined
|
|
&& sym_hash->root.u.def.section == sec
|
|
&& sym_hash->type == STT_FUNC
|
|
&& sym_hash->root.u.def.value + sym_hash->size > addr
|
|
&& sym_hash->root.u.def.value + sym_hash->size < toaddr)
|
|
sym_hash->size -= count;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Insert two words into a section whilst relaxing. */
|
|
|
|
static bfd_byte *
|
|
msp430_elf_relax_add_two_words (bfd * abfd, asection * sec, bfd_vma addr,
|
|
int word1, int word2)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
unsigned int sec_shndx;
|
|
bfd_byte *contents;
|
|
Elf_Internal_Rela *irel;
|
|
Elf_Internal_Rela *irelend;
|
|
Elf_Internal_Sym *isym;
|
|
Elf_Internal_Sym *isymend;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct elf_link_hash_entry **end_hashes;
|
|
unsigned int symcount;
|
|
bfd_vma sec_end;
|
|
asection *p;
|
|
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
sec_end = sec->size;
|
|
|
|
/* Make space for the new words. */
|
|
contents = bfd_realloc (contents, sec_end + 4);
|
|
memmove (contents + addr + 4, contents + addr, sec_end - addr);
|
|
|
|
/* Insert the new words. */
|
|
bfd_put_16 (abfd, word1, contents + addr);
|
|
bfd_put_16 (abfd, word2, contents + addr + 2);
|
|
|
|
/* Update the section information. */
|
|
sec->size += 4;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
|
|
/* Adjust all the relocs. */
|
|
irel = elf_section_data (sec)->relocs;
|
|
irelend = irel + sec->reloc_count;
|
|
|
|
for (; irel < irelend; irel++)
|
|
if ((irel->r_offset >= addr && irel->r_offset < sec_end))
|
|
irel->r_offset += 4;
|
|
|
|
/* Adjust the local symbols defined in this section. */
|
|
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
|
for (p = abfd->sections; p != NULL; p = p->next)
|
|
msp430_elf_relax_adjust_locals (abfd, p, addr, -4,
|
|
sec_shndx, sec_end);
|
|
|
|
/* Adjust the global symbols affected by the move. */
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
|
|
if (isym->st_shndx == sec_shndx
|
|
&& isym->st_value >= addr && isym->st_value < sec_end)
|
|
isym->st_value += 4;
|
|
|
|
/* Now adjust the global symbols defined in this section. */
|
|
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
|
|
- symtab_hdr->sh_info);
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
end_hashes = sym_hashes + symcount;
|
|
for (; sym_hashes < end_hashes; sym_hashes++)
|
|
{
|
|
struct elf_link_hash_entry *sym_hash = *sym_hashes;
|
|
|
|
if ((sym_hash->root.type == bfd_link_hash_defined
|
|
|| sym_hash->root.type == bfd_link_hash_defweak)
|
|
&& sym_hash->root.u.def.section == sec
|
|
&& sym_hash->root.u.def.value >= addr
|
|
&& sym_hash->root.u.def.value < sec_end)
|
|
sym_hash->root.u.def.value += 4;
|
|
}
|
|
|
|
return contents;
|
|
}
|
|
|
|
static bfd_boolean
|
|
msp430_elf_relax_section (bfd * abfd, asection * sec,
|
|
struct bfd_link_info * link_info,
|
|
bfd_boolean * again)
|
|
{
|
|
Elf_Internal_Shdr * symtab_hdr;
|
|
Elf_Internal_Rela * internal_relocs;
|
|
Elf_Internal_Rela * irel;
|
|
Elf_Internal_Rela * irelend;
|
|
bfd_byte * contents = NULL;
|
|
Elf_Internal_Sym * isymbuf = NULL;
|
|
|
|
/* Assume nothing changes. */
|
|
*again = FALSE;
|
|
|
|
/* We don't have to do anything for a relocatable link, if
|
|
this section does not have relocs, or if this is not a
|
|
code section. */
|
|
if (link_info->relocatable
|
|
|| (sec->flags & SEC_RELOC) == 0
|
|
|| sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
|
|
return TRUE;
|
|
|
|
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
|
|
|
|
/* Get a copy of the native relocations. */
|
|
internal_relocs =
|
|
_bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
|
|
if (internal_relocs == NULL)
|
|
goto error_return;
|
|
|
|
/* Walk through them looking for relaxing opportunities. */
|
|
irelend = internal_relocs + sec->reloc_count;
|
|
|
|
/* Do code size growing relocs first. */
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
|
{
|
|
bfd_vma symval;
|
|
|
|
/* If this isn't something that can be relaxed, then ignore
|
|
this reloc. */
|
|
if (uses_msp430x_relocs (abfd)
|
|
&& ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL)
|
|
;
|
|
else if (! uses_msp430x_relocs (abfd)
|
|
&& ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL)
|
|
;
|
|
else
|
|
continue;
|
|
|
|
/* Get the section contents if we haven't done so already. */
|
|
if (contents == NULL)
|
|
{
|
|
/* Get cached copy if it exists. */
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
|
goto error_return;
|
|
}
|
|
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
|
{
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (isymbuf == NULL)
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (isymbuf == NULL)
|
|
goto error_return;
|
|
}
|
|
|
|
/* Get the value of the symbol referred to by the reloc. */
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
|
{
|
|
/* A local symbol. */
|
|
Elf_Internal_Sym *isym;
|
|
asection *sym_sec;
|
|
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
|
if (isym->st_shndx == SHN_UNDEF)
|
|
sym_sec = bfd_und_section_ptr;
|
|
else if (isym->st_shndx == SHN_ABS)
|
|
sym_sec = bfd_abs_section_ptr;
|
|
else if (isym->st_shndx == SHN_COMMON)
|
|
sym_sec = bfd_com_section_ptr;
|
|
else
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
symval = (isym->st_value
|
|
+ sym_sec->output_section->vma + sym_sec->output_offset);
|
|
}
|
|
else
|
|
{
|
|
unsigned long indx;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
/* An external symbol. */
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
|
h = elf_sym_hashes (abfd)[indx];
|
|
BFD_ASSERT (h != NULL);
|
|
|
|
if (h->root.type != bfd_link_hash_defined
|
|
&& h->root.type != bfd_link_hash_defweak)
|
|
/* This appears to be a reference to an undefined
|
|
symbol. Just ignore it--it will be caught by the
|
|
regular reloc processing. */
|
|
continue;
|
|
|
|
symval = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
|
|
/* For simplicity of coding, we are going to modify the section
|
|
contents, the section relocs, and the BFD symbol table. We
|
|
must tell the rest of the code not to free up this
|
|
information. It would be possible to instead create a table
|
|
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
|
|
the linker is run. */
|
|
|
|
bfd_signed_vma value = symval;
|
|
int opcode;
|
|
|
|
/* Compute the value that will be relocated. */
|
|
value += irel->r_addend;
|
|
/* Convert to PC relative. */
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
|
value -= irel->r_offset;
|
|
value -= 2;
|
|
/* Scale. */
|
|
value >>= 1;
|
|
|
|
/* If it is in range then no modifications are needed. */
|
|
if (value >= -512 && value <= 511)
|
|
continue;
|
|
|
|
/* Get the opcode. */
|
|
opcode = bfd_get_16 (abfd, contents + irel->r_offset);
|
|
|
|
/* Compute the new opcode. We are going to convert:
|
|
J<cond> label
|
|
into:
|
|
J<inv-cond> 1f
|
|
BR[A] #label
|
|
1: */
|
|
switch (opcode & 0xfc00)
|
|
{
|
|
case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */
|
|
case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */
|
|
case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */
|
|
case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */
|
|
case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */
|
|
case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */
|
|
case 0x3000: /* jn */
|
|
/* There is no direct inverse of the Jn insn.
|
|
FIXME: we could do this as:
|
|
Jn 1f
|
|
br 2f
|
|
1: br label
|
|
2: */
|
|
continue;
|
|
default:
|
|
/* Not a conditional branch instruction. */
|
|
/* fprintf (stderr, "unrecog: %x\n", opcode); */
|
|
continue;
|
|
}
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Install the new opcode. */
|
|
bfd_put_16 (abfd, opcode, contents + irel->r_offset);
|
|
|
|
/* Insert the new branch instruction. */
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
/* Insert an absolute branch (aka MOVA) instruction. */
|
|
contents = msp430_elf_relax_add_two_words
|
|
(abfd, sec, irel->r_offset + 2, 0x0080, 0x0000);
|
|
|
|
/* Update the relocation to point to the inserted branch
|
|
instruction. Note - we are changing a PC-relative reloc
|
|
into an absolute reloc, but this is OK because we have
|
|
arranged with the assembler to have the reloc's value be
|
|
a (local) symbol, not a section+offset value. */
|
|
irel->r_offset += 2;
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430X_ABS20_ADR_SRC);
|
|
}
|
|
else
|
|
{
|
|
contents = msp430_elf_relax_add_two_words
|
|
(abfd, sec, irel->r_offset + 2, 0x4030, 0x0000);
|
|
|
|
/* See comment above about converting a 10-bit PC-rel
|
|
relocation into a 16-bit absolute relocation. */
|
|
irel->r_offset += 4;
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430_16);
|
|
}
|
|
|
|
/* Growing the section may mean that other
|
|
conditional branches need to be fixed. */
|
|
*again = TRUE;
|
|
}
|
|
|
|
for (irel = internal_relocs; irel < irelend; irel++)
|
|
{
|
|
bfd_vma symval;
|
|
|
|
/* Get the section contents if we haven't done so already. */
|
|
if (contents == NULL)
|
|
{
|
|
/* Get cached copy if it exists. */
|
|
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
|
contents = elf_section_data (sec)->this_hdr.contents;
|
|
else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
|
|
goto error_return;
|
|
}
|
|
|
|
/* Read this BFD's local symbols if we haven't done so already. */
|
|
if (isymbuf == NULL && symtab_hdr->sh_info != 0)
|
|
{
|
|
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
|
if (isymbuf == NULL)
|
|
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
|
symtab_hdr->sh_info, 0,
|
|
NULL, NULL, NULL);
|
|
if (isymbuf == NULL)
|
|
goto error_return;
|
|
}
|
|
|
|
/* Get the value of the symbol referred to by the reloc. */
|
|
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
|
{
|
|
/* A local symbol. */
|
|
Elf_Internal_Sym *isym;
|
|
asection *sym_sec;
|
|
|
|
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
|
if (isym->st_shndx == SHN_UNDEF)
|
|
sym_sec = bfd_und_section_ptr;
|
|
else if (isym->st_shndx == SHN_ABS)
|
|
sym_sec = bfd_abs_section_ptr;
|
|
else if (isym->st_shndx == SHN_COMMON)
|
|
sym_sec = bfd_com_section_ptr;
|
|
else
|
|
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
|
symval = (isym->st_value
|
|
+ sym_sec->output_section->vma + sym_sec->output_offset);
|
|
}
|
|
else
|
|
{
|
|
unsigned long indx;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
/* An external symbol. */
|
|
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
|
h = elf_sym_hashes (abfd)[indx];
|
|
BFD_ASSERT (h != NULL);
|
|
|
|
if (h->root.type != bfd_link_hash_defined
|
|
&& h->root.type != bfd_link_hash_defweak)
|
|
/* This appears to be a reference to an undefined
|
|
symbol. Just ignore it--it will be caught by the
|
|
regular reloc processing. */
|
|
continue;
|
|
|
|
symval = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
|
|
/* For simplicity of coding, we are going to modify the section
|
|
contents, the section relocs, and the BFD symbol table. We
|
|
must tell the rest of the code not to free up this
|
|
information. It would be possible to instead create a table
|
|
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
|
|
the linker is run. */
|
|
|
|
/* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
|
|
branch. */
|
|
/* Paranoia? paranoia... */
|
|
if (! uses_msp430x_relocs (abfd)
|
|
&& ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
/* Deal with pc-relative gunk. */
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
|
value -= irel->r_offset;
|
|
value += irel->r_addend;
|
|
|
|
/* 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
|
|
able to relax. */
|
|
if ((long) value < 1016 && (long) value > -1016)
|
|
{
|
|
int code0 = 0, code1 = 0, code2 = 0;
|
|
int i;
|
|
struct rcodes_s *rx;
|
|
|
|
/* Get the opcode. */
|
|
if (irel->r_offset >= 6)
|
|
code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
|
|
|
|
if (irel->r_offset >= 4)
|
|
code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
|
|
|
|
code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
|
|
|
|
if (code2 != 0x4010)
|
|
continue;
|
|
|
|
/* Check r4 and r3. */
|
|
for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
|
|
{
|
|
rx = &rcode[i];
|
|
if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
|
|
break;
|
|
else if (rx->cdx == 1 && rx->f1 == code1)
|
|
break;
|
|
else if (rx->cdx == 0) /* This is an unconditional jump. */
|
|
break;
|
|
}
|
|
|
|
/* Check labels:
|
|
.Label0: ; we do not care about this label
|
|
jeq +6
|
|
.Label1: ; make sure there is no label here
|
|
jl +4
|
|
.Label2: ; make sure there is no label here
|
|
br .Label_dst
|
|
|
|
So, if there is .Label1 or .Label2 we cannot relax this code.
|
|
This actually should not happen, cause for relaxable
|
|
instructions we use RL_PCREL reloc instead of 16_PCREL.
|
|
Will change this in the future. */
|
|
|
|
if (rx->cdx > 0
|
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
|
irel->r_offset - 2))
|
|
continue;
|
|
if (rx->cdx > 1
|
|
&& msp430_elf_symbol_address_p (abfd, sec, isymbuf,
|
|
irel->r_offset - 4))
|
|
continue;
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the relocation's type. */
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
if (rx->labels == 3) /* Handle special cases. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430X_2X_PCREL);
|
|
else
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430X_10_PCREL);
|
|
}
|
|
else
|
|
{
|
|
if (rx->labels == 3) /* Handle special cases. */
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430_2X_PCREL);
|
|
else
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430_10_PCREL);
|
|
}
|
|
|
|
/* Fix the opcode right way. */
|
|
bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
|
|
if (rx->t1)
|
|
bfd_put_16 (abfd, rx->t1,
|
|
contents + irel->r_offset - rx->off + 2);
|
|
|
|
/* Delete bytes. */
|
|
if (!msp430_elf_relax_delete_bytes (abfd, sec,
|
|
irel->r_offset - rx->off +
|
|
rx->ncl, rx->bs))
|
|
goto error_return;
|
|
|
|
/* Handle unconditional jumps. */
|
|
if (rx->cdx == 0)
|
|
irel->r_offset -= 2;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Try to turn a 16-bit absolute branch into a 10-bit pc-relative
|
|
branch. */
|
|
if (uses_msp430x_relocs (abfd)
|
|
&& ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16)
|
|
{
|
|
bfd_vma value = symval;
|
|
|
|
value -= (sec->output_section->vma + sec->output_offset);
|
|
value -= irel->r_offset;
|
|
value += irel->r_addend;
|
|
|
|
/* 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
|
|
able to relax. */
|
|
if ((long) value < 1016 && (long) value > -1016)
|
|
{
|
|
int code2;
|
|
|
|
/* Get the opcode. */
|
|
code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
|
|
if (code2 != 0x4030)
|
|
continue;
|
|
/* FIXME: check r4 and r3 ? */
|
|
/* FIXME: Handle 0x4010 as well ? */
|
|
|
|
/* Note that we've changed the relocs, section contents, etc. */
|
|
elf_section_data (sec)->relocs = internal_relocs;
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
|
|
/* Fix the relocation's type. */
|
|
if (uses_msp430x_relocs (abfd))
|
|
{
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430X_10_PCREL);
|
|
}
|
|
else
|
|
{
|
|
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
|
R_MSP430_10_PCREL);
|
|
}
|
|
|
|
/* Fix the opcode right way. */
|
|
bfd_put_16 (abfd, 0x3c00, contents + irel->r_offset - 2);
|
|
irel->r_offset -= 2;
|
|
|
|
/* Delete bytes. */
|
|
if (!msp430_elf_relax_delete_bytes (abfd, sec,
|
|
irel->r_offset + 2, 2))
|
|
goto error_return;
|
|
|
|
/* That will change things, so, we should relax again.
|
|
Note that this is not required, and it may be slow. */
|
|
*again = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
{
|
|
if (!link_info->keep_memory)
|
|
free (isymbuf);
|
|
else
|
|
{
|
|
/* Cache the symbols for elf_link_input_bfd. */
|
|
symtab_hdr->contents = (unsigned char *) isymbuf;
|
|
}
|
|
}
|
|
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
{
|
|
if (!link_info->keep_memory)
|
|
free (contents);
|
|
else
|
|
{
|
|
/* Cache the section contents for elf_link_input_bfd. */
|
|
elf_section_data (sec)->this_hdr.contents = contents;
|
|
}
|
|
}
|
|
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
|
|
return TRUE;
|
|
|
|
error_return:
|
|
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
|
free (isymbuf);
|
|
if (contents != NULL
|
|
&& elf_section_data (sec)->this_hdr.contents != contents)
|
|
free (contents);
|
|
if (internal_relocs != NULL
|
|
&& elf_section_data (sec)->relocs != internal_relocs)
|
|
free (internal_relocs);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Handle an MSP430 specific section when reading an object file.
|
|
This is called when bfd_section_from_shdr finds a section with
|
|
an unknown type. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_section_from_shdr (bfd *abfd,
|
|
Elf_Internal_Shdr * hdr,
|
|
const char *name,
|
|
int shindex)
|
|
{
|
|
switch (hdr->sh_type)
|
|
{
|
|
case SHT_MSP430_SEC_FLAGS:
|
|
case SHT_MSP430_SYM_ALIASES:
|
|
case SHT_MSP430_ATTRIBUTES:
|
|
return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag)
|
|
{
|
|
_bfd_error_handler
|
|
(_("Warning: %B: Unknown MSPABI object attribute %d"),
|
|
abfd, tag);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Determine whether an object attribute tag takes an integer, a
|
|
string or both. */
|
|
|
|
static int
|
|
elf32_msp430_obj_attrs_arg_type (int tag)
|
|
{
|
|
if (tag == Tag_compatibility)
|
|
return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
|
|
|
|
if (tag < 32)
|
|
return ATTR_TYPE_FLAG_INT_VAL;
|
|
|
|
return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
|
|
}
|
|
|
|
static inline const char *
|
|
isa_type (int isa)
|
|
{
|
|
switch (isa)
|
|
{
|
|
case 1: return "MSP430";
|
|
case 2: return "MSP430X";
|
|
default: return "unknown";
|
|
}
|
|
}
|
|
|
|
static inline const char *
|
|
code_model (int model)
|
|
{
|
|
switch (model)
|
|
{
|
|
case 1: return "small";
|
|
case 2: return "large";
|
|
default: return "unknown";
|
|
}
|
|
}
|
|
|
|
static inline const char *
|
|
data_model (int model)
|
|
{
|
|
switch (model)
|
|
{
|
|
case 1: return "small";
|
|
case 2: return "large";
|
|
case 3: return "restricted large";
|
|
default: return "unknown";
|
|
}
|
|
}
|
|
|
|
/* Merge MSPABI object attributes from IBFD into OBFD.
|
|
Raise an error if there are conflicting attributes. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_merge_mspabi_attributes (bfd *ibfd, bfd *obfd)
|
|
{
|
|
obj_attribute *in_attr;
|
|
obj_attribute *out_attr;
|
|
bfd_boolean result = TRUE;
|
|
static bfd * first_input_bfd = NULL;
|
|
|
|
/* Skip linker created files. */
|
|
if (ibfd->flags & BFD_LINKER_CREATED)
|
|
return TRUE;
|
|
|
|
/* If this is the first real object just copy the attributes. */
|
|
if (!elf_known_obj_attributes_proc (obfd)[0].i)
|
|
{
|
|
_bfd_elf_copy_obj_attributes (ibfd, obfd);
|
|
|
|
out_attr = elf_known_obj_attributes_proc (obfd);
|
|
|
|
/* Use the Tag_null value to indicate that
|
|
the attributes have been initialized. */
|
|
out_attr[0].i = 1;
|
|
|
|
first_input_bfd = ibfd;
|
|
return TRUE;
|
|
}
|
|
|
|
in_attr = elf_known_obj_attributes_proc (ibfd);
|
|
out_attr = elf_known_obj_attributes_proc (obfd);
|
|
|
|
/* The ISAs must be the same. */
|
|
if (in_attr[OFBA_MSPABI_Tag_ISA].i != out_attr[OFBA_MSPABI_Tag_ISA].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses %s instructions but %B uses %s"),
|
|
ibfd, first_input_bfd,
|
|
isa_type (in_attr[OFBA_MSPABI_Tag_ISA].i),
|
|
isa_type (out_attr[OFBA_MSPABI_Tag_ISA].i));
|
|
result = FALSE;
|
|
}
|
|
|
|
/* The code models must be the same. */
|
|
if (in_attr[OFBA_MSPABI_Tag_Code_Model].i !=
|
|
out_attr[OFBA_MSPABI_Tag_Code_Model].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses the %s code model whereas %B uses the %s code model"),
|
|
ibfd, first_input_bfd,
|
|
code_model (in_attr[OFBA_MSPABI_Tag_Code_Model].i),
|
|
code_model (out_attr[OFBA_MSPABI_Tag_Code_Model].i));
|
|
result = FALSE;
|
|
}
|
|
|
|
/* The large code model is only supported by the MSP430X. */
|
|
if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 2
|
|
&& out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses the large code model but %B uses MSP430 instructions"),
|
|
ibfd, first_input_bfd);
|
|
result = FALSE;
|
|
}
|
|
|
|
/* The data models must be the same. */
|
|
if (in_attr[OFBA_MSPABI_Tag_Data_Model].i !=
|
|
out_attr[OFBA_MSPABI_Tag_Data_Model].i)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses the %s data model whereas %B uses the %s data model"),
|
|
ibfd, first_input_bfd,
|
|
data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i),
|
|
data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
|
|
result = FALSE;
|
|
}
|
|
|
|
/* The small code model requires the use of the small data model. */
|
|
if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 1
|
|
&& out_attr[OFBA_MSPABI_Tag_Data_Model].i != 1)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses the small code model but %B uses the %s data model"),
|
|
ibfd, first_input_bfd,
|
|
data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i));
|
|
result = FALSE;
|
|
}
|
|
|
|
/* The large data models are only supported by the MSP430X. */
|
|
if (in_attr[OFBA_MSPABI_Tag_Data_Model].i > 1
|
|
&& out_attr[OFBA_MSPABI_Tag_ISA].i != 2)
|
|
{
|
|
_bfd_error_handler
|
|
(_("error: %B uses the %s data model but %B only uses MSP430 instructions"),
|
|
ibfd, first_input_bfd,
|
|
data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i));
|
|
result = FALSE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Merge backend specific data from an object file to the output
|
|
object file when linking. */
|
|
|
|
static bfd_boolean
|
|
elf32_msp430_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
|
|
{
|
|
/* Make sure that the machine number reflects the most
|
|
advanced version of the MSP architecture required. */
|
|
#define max(a,b) ((a) > (b) ? (a) : (b))
|
|
if (bfd_get_mach (ibfd) != bfd_get_mach (obfd))
|
|
bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd),
|
|
max (bfd_get_mach (ibfd), bfd_get_mach (obfd)));
|
|
#undef max
|
|
|
|
return elf32_msp430_merge_mspabi_attributes (ibfd, obfd);
|
|
}
|
|
|
|
static bfd_boolean
|
|
msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
|
|
{
|
|
return _bfd_elf_is_local_label_name (abfd, sym->name);
|
|
}
|
|
|
|
/* This is gross. The MSP430 EABI says that (sec 11.5):
|
|
|
|
"An implementation may choose to use Rel or Rela
|
|
type relocations for other relocations."
|
|
|
|
But it also says that:
|
|
|
|
"Certain relocations are identified as Rela only. [snip]
|
|
Where Rela is specified, an implementation must honor
|
|
this requirement."
|
|
|
|
There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but
|
|
to keep things simple we choose to use RELA relocations throughout. The
|
|
problem is that the TI compiler generates REL relocations, so we have to
|
|
be able to accept those as well. */
|
|
|
|
#define elf_backend_may_use_rel_p 1
|
|
#define elf_backend_may_use_rela_p 1
|
|
#define elf_backend_default_use_rela_p 1
|
|
|
|
#undef elf_backend_obj_attrs_vendor
|
|
#define elf_backend_obj_attrs_vendor "mspabi"
|
|
#undef elf_backend_obj_attrs_section
|
|
#define elf_backend_obj_attrs_section ".MSP430.attributes"
|
|
#undef elf_backend_obj_attrs_section_type
|
|
#define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES
|
|
#define elf_backend_section_from_shdr elf32_msp430_section_from_shdr
|
|
#define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown
|
|
#undef elf_backend_obj_attrs_arg_type
|
|
#define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type
|
|
#define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data
|
|
|
|
#define ELF_ARCH bfd_arch_msp430
|
|
#define ELF_MACHINE_CODE EM_MSP430
|
|
#define ELF_MACHINE_ALT1 EM_MSP430_OLD
|
|
#define ELF_MAXPAGESIZE 4
|
|
#define ELF_OSABI ELFOSABI_STANDALONE
|
|
|
|
#define TARGET_LITTLE_SYM msp430_elf32_vec
|
|
#define TARGET_LITTLE_NAME "elf32-msp430"
|
|
|
|
#define elf_info_to_howto msp430_info_to_howto_rela
|
|
#define elf_info_to_howto_rel NULL
|
|
#define elf_backend_relocate_section elf32_msp430_relocate_section
|
|
#define elf_backend_check_relocs elf32_msp430_check_relocs
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
|
|
#define elf_backend_object_p elf32_msp430_object_p
|
|
#define bfd_elf32_bfd_relax_section msp430_elf_relax_section
|
|
#define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol
|
|
|
|
#undef elf32_bed
|
|
#define elf32_bed elf32_msp430_bed
|
|
|
|
#include "elf32-target.h"
|
|
|
|
/* The TI compiler sets the OSABI field to ELFOSABI_NONE. */
|
|
#undef TARGET_LITTLE_SYM
|
|
#define TARGET_LITTLE_SYM msp430_elf32_ti_vec
|
|
|
|
#undef elf32_bed
|
|
#define elf32_bed elf32_msp430_ti_bed
|
|
|
|
#undef ELF_OSABI
|
|
#define ELF_OSABI ELFOSABI_NONE
|
|
|
|
static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] =
|
|
{
|
|
/* prefix, prefix_length, suffix_len, type, attributes. */
|
|
{ STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 },
|
|
{ STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 },
|
|
{ STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 },
|
|
{ NULL, 0, 0, 0, 0 }
|
|
};
|
|
|
|
#include "elf32-target.h"
|