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- /* MSP430-specific support for 32-bit ELF
- Copyright (C) 2002-2022 Free Software Foundation, Inc.
- Contributed by Dmitry Diky <diwil@mail.ru>
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libiberty.h"
- #include "libbfd.h"
- #include "elf-bfd.h"
- #include "elf/msp430.h"
- static bool debug_relocs = 0;
- /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
- #define OCTETS_PER_BYTE(ABFD, SEC) 1
- static bfd_reloc_status_type
- rl78_sym_diff_handler (bfd * abfd,
- arelent * reloc,
- asymbol * sym ATTRIBUTE_UNUSED,
- void * addr ATTRIBUTE_UNUSED,
- asection * input_sec,
- bfd * out_bfd ATTRIBUTE_UNUSED,
- char ** error_message ATTRIBUTE_UNUSED)
- {
- bfd_size_type octets;
- octets = reloc->address * OCTETS_PER_BYTE (abfd, input_sec);
- /* Catch the case where bfd_install_relocation would return
- bfd_reloc_outofrange because the SYM_DIFF reloc is being used in a very
- small section. It does not actually matter if this happens because all
- that SYM_DIFF does is compute a (4-byte) value. A second reloc then uses
- this value, and it is that reloc that must fit into the section.
- This happens in eg, gcc/testsuite/gcc.c-torture/compile/labels-3.c. */
- if ((octets + bfd_get_reloc_size (reloc->howto))
- > bfd_get_section_limit_octets (abfd, input_sec))
- return bfd_reloc_ok;
- return bfd_reloc_continue;
- }
- /* Special handler for relocations which don't have to be relocated.
- This function just simply returns bfd_reloc_ok. */
- static bfd_reloc_status_type
- msp430_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
- asymbol *symbol ATTRIBUTE_UNUSED,
- void *data ATTRIBUTE_UNUSED, asection *input_section,
- bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
- {
- if (output_bfd != NULL)
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
- static reloc_howto_type elf_msp430_howto_table[] =
- {
- HOWTO (R_MSP430_NONE, /* type */
- 0, /* rightshift */
- 3, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_MSP430_32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_32", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 10 bit PC relative relocation. */
- HOWTO (R_MSP430_10_PCREL, /* type */
- 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_MSP430_10_PCREL", /* name */
- false, /* partial_inplace */
- 0x3ff, /* src_mask */
- 0x3ff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 16 bit absolute relocation. */
- HOWTO (R_MSP430_16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16 bit PC relative relocation for command address. */
- HOWTO (R_MSP430_16_PCREL, /* type */
- 1, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16_PCREL", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 16 bit absolute relocation, byte operations. */
- HOWTO (R_MSP430_16_BYTE, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16_BYTE", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16 bit absolute relocation for command address. */
- HOWTO (R_MSP430_16_PCREL_BYTE,/* type */
- 1, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16_PCREL_BYTE",/* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 10 bit PC relative relocation for complicated polymorphs. */
- HOWTO (R_MSP430_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_MSP430_2X_PCREL", /* name */
- false, /* partial_inplace */
- 0x3ff, /* src_mask */
- 0x3ff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 16 bit relaxable relocation for command address. */
- HOWTO (R_MSP430_RL_PCREL, /* type */
- 1, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_RL_PCREL", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true) /* pcrel_offset */
- /* A 8-bit absolute relocation. */
- , HOWTO (R_MSP430_8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_8", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* 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_MSP430_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 */
- rl78_sym_diff_handler, /* special handler. */
- "R_MSP430_SYM_DIFF", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* The length of unsigned-leb128 is variable, just assume the
- size is one byte here. */
- HOWTO (R_MSP430_GNU_SET_ULEB128, /* type */
- 0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- msp430_elf_ignore_reloc, /* special handler. */
- "R_MSP430_GNU_SET_ULEB128", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* The length of unsigned-leb128 is variable, just assume the
- size is one byte here. */
- HOWTO (R_MSP430_GNU_SUB_ULEB128, /* type */
- 0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- msp430_elf_ignore_reloc, /* special handler. */
- "R_MSP430_GNU_SUB_ULEB128", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- };
- static reloc_howto_type elf_msp430x_howto_table[] =
- {
- HOWTO (R_MSP430_NONE, /* type */
- 0, /* rightshift */
- 3, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_MSP430_ABS32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_ABS32", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_MSP430_ABS16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_ABS16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_MSP430_ABS8, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 8, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_ABS8", /* name */
- false, /* partial_inplace */
- 0xff, /* src_mask */
- 0xff, /* dst_mask */
- false), /* pcrel_offset */
- HOWTO (R_MSP430_PCR16, /* type */
- 1, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_PCR16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_PCR20_EXT_SRC",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_PCR20_EXT_DST",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_PCR20_EXT_ODST",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS20_EXT_SRC",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS20_EXT_DST",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS20_EXT_ODST",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS20_ADR_SRC",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS20_ADR_DST",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_PCR16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_PCR16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_PCR20_CALL, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_PCR20_CALL",/* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430X_ABS16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430X_ABS16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430_ABS_HI16, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_ABS_HI16", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- HOWTO (R_MSP430_PREL31, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_PREL31", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- EMPTY_HOWTO (R_MSP430_EHTYPE),
- /* A 10 bit PC relative relocation. */
- HOWTO (R_MSP430X_10_PCREL, /* type */
- 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 */
- rl78_sym_diff_handler, /* special handler. */
- "R_MSP430X_SYM_DIFF", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* The length of unsigned-leb128 is variable, just assume the
- size is one byte here. */
- HOWTO (R_MSP430X_GNU_SET_ULEB128, /* type */
- 0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- msp430_elf_ignore_reloc, /* special handler. */
- "R_MSP430X_GNU_SET_ULEB128", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* The length of unsigned-leb128 is variable, just assume the
- size is one byte here. */
- HOWTO (R_MSP430X_GNU_SUB_ULEB128, /* type */
- 0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- msp430_elf_ignore_reloc, /* special handler. */
- "R_MSP430X_GNU_SUB_ULEB128", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* 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},
- {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430_GNU_SET_ULEB128 },
- {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430_GNU_SUB_ULEB128 }
- };
- 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},
- {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430X_GNU_SET_ULEB128 },
- {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430X_GNU_SUB_ULEB128 }
- };
- static inline bool
- 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 bool
- msp430_info_to_howto_rela (bfd * abfd,
- 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)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = elf_msp430x_howto_table + r_type;
- }
- else if (r_type >= (unsigned int) R_MSP430_max)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- cache_ptr->howto = &elf_msp430_howto_table[r_type];
- return true;
- }
- /* Look through the relocs for a section during the first phase.
- Since we don't do .gots or .plts, we just need to consider the
- virtual table relocs for gc. */
- static bool
- 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 (bfd_link_relocatable (info))
- return true;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- struct elf_link_hash_entry *h;
- unsigned long r_symndx;
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- }
- }
- 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;
- bool 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 (debug_relocs)
- printf ("writing relocation (%p) at 0x%lx type: %d\n", rel,
- (long) (input_section->output_section->vma + input_section->output_offset
- + rel->r_offset), howto->type);
- if (sym_diff_section != NULL)
- {
- BFD_ASSERT (sym_diff_section == input_section);
- if (uses_msp430x_relocs (input_bfd))
- switch (howto->type)
- {
- case R_MSP430X_GNU_SET_ULEB128:
- relocation += (!is_rel_reloc ? rel->r_addend : 0);
- /* Fall through. */
- 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_GNU_SET_ULEB128:
- relocation += (!is_rel_reloc ? rel->r_addend : 0);
- /* Fall through. */
- 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)
- && howto->type == R_MSP430X_GNU_SET_ULEB128)
- || (!uses_msp430x_relocs (input_bfd)
- && howto->type == R_MSP430_GNU_SET_ULEB128))
- {
- unsigned int len, new_len = 0;
- bfd_byte *endp, *p;
- unsigned int val = relocation;
- _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len);
- /* Clean the contents value to zero. Do not reduce the length. */
- p = contents + rel->r_offset;
- endp = (p + len) - 1;
- memset (p, 0x80, len - 1);
- *(endp) = 0;
- /* Get the length of the new uleb128 value. */
- do
- {
- new_len++;
- val >>= 7;
- } while (val);
- if (new_len > len)
- {
- _bfd_error_handler
- (_("error: final size of uleb128 value at offset 0x%lx in %pA "
- "from %pB exceeds available space"),
- (long) rel->r_offset, input_section, input_bfd);
- }
- else
- {
- /* If the number of bytes required to store the new value has
- decreased, "right align" the new value within the available space,
- so the MSB side is padded with uleb128 zeros (0x80). */
- p = _bfd_write_unsigned_leb128 (p + (len - new_len), endp,
- relocation);
- /* We checked there is enough space for the new value above, so this
- should never be NULL. */
- BFD_ASSERT (p);
- }
- return bfd_reloc_ok;
- }
- else if (uses_msp430x_relocs (input_bfd))
- switch (howto->type)
- {
- case R_MSP430X_SYM_DIFF:
- case R_MSP430X_GNU_SUB_ULEB128:
- /* 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 + (howto->type == R_MSP430X_GNU_SUB_ULEB128
- ? rel->r_addend : 0);
- 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 bool 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 + 6);
- 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 + 4);
- 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 + 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 + 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 + 4);
- 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:
- /* [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 + 4);
- 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 & 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 + 6);
- 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]+[16,16] = -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]+[16,16] = ---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]+[16,16] = ---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 bool 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:
- case R_MSP430_GNU_SUB_ULEB128:
- /* 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 + (howto->type == R_MSP430_GNU_SUB_ULEB128
- ? rel->r_addend : 0);
- 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 int
- 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 (sec) : name;
- }
- else
- {
- bool 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 (bfd_link_relocatable (info))
- 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:
- (*info->callbacks->reloc_overflow)
- (info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- break;
- case bfd_reloc_undefined:
- (*info->callbacks->undefined_symbol)
- (info, name, input_bfd, input_section, rel->r_offset, true);
- break;
- case bfd_reloc_outofrange:
- msg = _("internal error: 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)
- (*info->callbacks->warning) (info, msg, name, input_bfd,
- input_section, rel->r_offset);
- }
- }
- 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 bool
- bfd_elf_msp430_final_write_processing (bfd *abfd)
- {
- 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;
- return _bfd_elf_final_write_processing (abfd);
- }
- /* Set the right machine number. */
- static bool
- 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 bool
- 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 bool
- 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 bool
- 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;
- if (debug_relocs)
- printf (" deleting %d bytes between 0x%lx to 0x%lx\n",
- count, (long) addr, (long) toaddr);
- 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 (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
- && (startswith (name, ".Letext")
- || startswith (name, ".LFE")))))
- {
- if (debug_relocs)
- printf (" adjusting value of local symbol %s from 0x%lx ",
- name, (long) isym->st_value);
- if (isym->st_value < addr + count)
- isym->st_value = addr;
- else
- isym->st_value -= count;
- if (debug_relocs)
- printf ("to 0x%lx\n", (long) isym->st_value);
- }
- /* 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 one or two words into a section whilst relaxing. */
- static bfd_byte *
- msp430_elf_relax_add_words (bfd * abfd, asection * sec, bfd_vma addr,
- int num_words, 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;
- if (debug_relocs)
- printf (" adding %d words at 0x%lx\n", num_words,
- (long) (sec->output_section->vma + sec->output_offset + addr));
- contents = elf_section_data (sec)->this_hdr.contents;
- sec_end = sec->size;
- int num_bytes = num_words * 2;
- /* Make space for the new words. */
- contents = bfd_realloc (contents, sec_end + num_bytes);
- memmove (contents + addr + num_bytes, contents + addr, sec_end - addr);
- /* Insert the new words. */
- bfd_put_16 (abfd, word1, contents + addr);
- if (num_words == 2)
- bfd_put_16 (abfd, word2, contents + addr + 2);
- /* Update the section information. */
- sec->size += num_bytes;
- 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 += num_bytes;
- /* 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, -num_bytes,
- 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)
- {
- if (debug_relocs)
- printf (" adjusting value of local symbol %s from 0x%lx to "
- "0x%lx\n", bfd_elf_string_from_elf_section
- (abfd, symtab_hdr->sh_link, isym->st_name),
- (long) isym->st_value, (long)(isym->st_value + num_bytes));
- isym->st_value += num_bytes;
- }
- /* 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 += num_bytes;
- }
- return contents;
- }
- static bool
- msp430_elf_relax_section (bfd * abfd, asection * sec,
- struct bfd_link_info * link_info,
- bool * 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 (bfd_link_relocatable (link_info)
- || (sec->flags & SEC_RELOC) == 0
- || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
- return true;
- if (debug_relocs)
- printf ("Relaxing %s (%p), output_offset: 0x%lx sec size: 0x%lx\n",
- sec->name, sec, (long) sec->output_offset, (long) sec->size);
- 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;
- if (debug_relocs)
- printf (" trying code size growing relocs\n");
- /* 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);
- if (debug_relocs)
- printf (" processing reloc at 0x%lx for local sym: %s "
- "st_value: 0x%lx adj value: 0x%lx\n",
- (long) (sec->output_offset + sec->output_section->vma
- + irel->r_offset),
- bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
- isym->st_name),
- (long) isym->st_value, (long) symval);
- }
- 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);
- if (debug_relocs)
- printf (" processing reloc at 0x%lx for global sym: %s "
- "st_value: 0x%lx adj value: 0x%lx\n",
- (long) (sec->output_offset + sec->output_section->vma
- + irel->r_offset),
- h->root.root.string, (long) h->root.u.def.value,
- (long) symval);
- }
- /* 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:
- JMP label
- into:
- BR[A] label
- or
- 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;
- case 0x3c00:
- if (uses_msp430x_relocs (abfd))
- opcode = 0x0080; /* JMP -> BRA */
- else
- opcode = 0x4030; /* JMP -> BR */
- break;
- default:
- /* Unhandled 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))
- {
- if (debug_relocs)
- printf (" R_MSP430X_10_PCREL -> R_MSP430X_ABS20_ADR_SRC "
- "(growing with new opcode 0x%x)\n", opcode);
- /* Insert an absolute branch (aka MOVA) instruction.
- Note that bits 19:16 of the address are stored in the first word
- of the insn, so this is where r_offset will point to. */
- if (opcode == 0x0080)
- {
- /* If we're inserting a BRA because we are converting from a JMP,
- then only add one word for destination address; the BRA opcode
- has already been written. */
- contents = msp430_elf_relax_add_words
- (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0);
- }
- else
- {
- contents = msp430_elf_relax_add_words
- (abfd, sec, irel->r_offset + 2, 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
- {
- if (debug_relocs)
- printf (" R_MSP430_10_PCREL -> R_MSP430_16 "
- "(growing with new opcode 0x%x)\n", opcode);
- if (opcode == 0x4030)
- {
- /* If we're inserting a BR because we are converting from a JMP,
- then only add one word for destination address; the BR opcode
- has already been written. */
- contents = msp430_elf_relax_add_words
- (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0);
- irel->r_offset += 2;
- }
- else
- {
- contents = msp430_elf_relax_add_words
- (abfd, sec, irel->r_offset + 2, 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;
- }
- if (debug_relocs)
- printf (" trying code size shrinking relocs\n");
- 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);
- if (debug_relocs)
- printf (" processing reloc at 0x%lx for local sym: %s "
- "st_value: 0x%lx adj value: 0x%lx\n",
- (long) (sec->output_offset + sec->output_section->vma
- + irel->r_offset),
- bfd_elf_string_from_elf_section
- (abfd, symtab_hdr->sh_link, isym->st_name),
- (long) isym->st_value, (long) symval);
- }
- 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);
- if (debug_relocs)
- printf (" processing reloc at 0x%lx for global sym: %s "
- "st_value: 0x%lx adj value: 0x%lx\n", (long)
- (sec->output_offset + sec->output_section->vma
- + irel->r_offset),
- h->root.root.string, (long) h->root.u.def.value,
- (long) symval);
- }
- /* 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;
- if (debug_relocs)
- printf (" R_MSP430_RL_PCREL -> ");
- /* 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);
- if (debug_relocs)
- printf ("R_MSP430_2X_PCREL (shrinking with new opcode"
- " 0x%x)\n", rx->t0);
- }
- else
- {
- irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
- R_MSP430_10_PCREL);
- if (debug_relocs)
- printf ("R_MSP430_10_PCREL (shrinking with new opcode"
- " 0x%x)\n", rx->t0);
- }
- }
- /* 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)
- || (! uses_msp430x_relocs (abfd)
- && ELF32_R_TYPE (irel->r_info) == R_MSP430_16))
- {
- 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 code1, code2, opcode;
- /* Get the opcode. */
- code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
- if (code2 != 0x4030) /* BR -> JMP */
- 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);
- if (debug_relocs)
- printf (" R_MSP430X_16 -> R_MSP430X_10_PCREL ");
- }
- else
- {
- irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
- R_MSP430_10_PCREL);
- if (debug_relocs)
- printf (" R_MSP430_16 -> R_MSP430_10_PCREL ");
- }
- /* If we're trying to shrink a BR[A] after previously having
- grown a JMP for this reloc, then we have a sequence like
- this:
- J<cond> 1f
- BR[A]
- 1:
- The opcode for J<cond> has the target hard-coded as 2 words
- ahead of the insn, instead of using a reloc.
- This means we cannot rely on any of the helper functions to
- update this hard-coded jump destination if we remove the
- BR[A] insn, so we must explicitly update it here.
- This does mean that we can remove the entire branch
- instruction, and invert the conditional jump, saving us 4
- bytes rather than only 2 if we detected this in the normal
- way. */
- code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
- switch (code1)
- {
- case 0x3802: opcode = 0x3401; break; /* Jl +2 -> Jge +1 */
- case 0x3402: opcode = 0x3801; break; /* Jge +2 -> Jl +1 */
- case 0x2c02: opcode = 0x2801; break; /* Jhs +2 -> Jlo +1 */
- case 0x2802: opcode = 0x2c01; break; /* Jlo +2 -> Jhs +1 */
- case 0x2402: opcode = 0x2001; break; /* Jeq +2 -> Jne +1 */
- case 0x2002: opcode = 0x2401; break; /* jne +2 -> Jeq +1 */
- case 0x3002: /* jn +2 */
- /* FIXME: There is no direct inverse of the Jn insn. */
- continue;
- default:
- /* The previous opcode does not have a hard-coded jump
- that we added when previously relaxing, so relax the
- current branch as normal. */
- opcode = 0x3c00;
- break;
- }
- if (debug_relocs)
- printf ("(shrinking with new opcode 0x%x)\n", opcode);
- if (opcode != 0x3c00)
- {
- /* Invert the opcode of the conditional jump. */
- bfd_put_16 (abfd, opcode, contents + irel->r_offset - 4);
- irel->r_offset -= 4;
- /* Delete 4 bytes - the full BR insn. */
- if (!msp430_elf_relax_delete_bytes (abfd, sec,
- irel->r_offset + 2, 4))
- goto error_return;
- }
- else
- {
- /* Fix the opcode right way. */
- bfd_put_16 (abfd, opcode, 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 (elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- return true;
- error_return:
- if (symtab_hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- if (elf_section_data (sec)->this_hdr.contents != contents)
- free (contents);
- if (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 bool
- 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 bool
- elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("warning: %pB: 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 and GNU object attributes from IBFD into OBFD.
- Raise an error if there are conflicting attributes. */
- static bool
- elf32_msp430_merge_msp430_attributes (bfd *ibfd, struct bfd_link_info *info)
- {
- bfd *obfd = info->output_bfd;
- obj_attribute *in_msp_attr, *in_gnu_attr;
- obj_attribute *out_msp_attr, *out_gnu_attr;
- bool result = true;
- static bfd * first_input_bfd = NULL;
- /* Skip linker created files. */
- if (ibfd->flags & BFD_LINKER_CREATED)
- return true;
- /* LTO can create temporary files for linking which may not have an attribute
- section. */
- if (ibfd->lto_output
- && bfd_get_section_by_name (ibfd, ".MSP430.attributes") == NULL)
- 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_msp_attr = elf_known_obj_attributes_proc (obfd);
- /* Use the Tag_null value to indicate that
- the attributes have been initialized. */
- out_msp_attr[0].i = 1;
- first_input_bfd = ibfd;
- return true;
- }
- in_msp_attr = elf_known_obj_attributes_proc (ibfd);
- out_msp_attr = elf_known_obj_attributes_proc (obfd);
- in_gnu_attr = elf_known_obj_attributes (ibfd) [OBJ_ATTR_GNU];
- out_gnu_attr = elf_known_obj_attributes (obfd) [OBJ_ATTR_GNU];
- /* The ISAs must be the same. */
- if (in_msp_attr[OFBA_MSPABI_Tag_ISA].i != out_msp_attr[OFBA_MSPABI_Tag_ISA].i)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses %s instructions but %pB uses %s"),
- ibfd, isa_type (in_msp_attr[OFBA_MSPABI_Tag_ISA].i),
- first_input_bfd, isa_type (out_msp_attr[OFBA_MSPABI_Tag_ISA].i));
- result = false;
- }
- /* The code models must be the same. */
- if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i
- != out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses the %s code model whereas %pB uses the %s code model"),
- ibfd, code_model (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i),
- first_input_bfd,
- code_model (out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i));
- result = false;
- }
- /* The large code model is only supported by the MSP430X. */
- if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 2
- && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses the large code model but %pB uses MSP430 instructions"),
- ibfd, first_input_bfd);
- result = false;
- }
- /* The data models must be the same. */
- if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i
- != out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses the %s data model whereas %pB uses the %s data model"),
- ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i),
- first_input_bfd,
- data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i));
- result = false;
- }
- /* The small code model requires the use of the small data model. */
- if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 1
- && out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i != 1)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses the small code model but %pB uses the %s data model"),
- ibfd, first_input_bfd,
- data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i));
- result = false;
- }
- /* The large data models are only supported by the MSP430X. */
- if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i > 1
- && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("error: %pB uses the %s data model but %pB only uses MSP430 instructions"),
- ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i),
- first_input_bfd);
- result = false;
- }
- /* Just ignore the data region unless the large memory model is in use.
- We have already checked that ibfd and obfd use the same memory model. */
- if ((in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i
- == OFBA_MSPABI_Val_Code_Model_LARGE)
- && (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i
- == OFBA_MSPABI_Val_Data_Model_LARGE))
- {
- /* We cannot allow "lower region only" to be linked with any other
- values (i.e. ANY or NONE).
- Before this attribute existed, "ANY" region was the default. */
- bool ibfd_lower_region_used
- = (in_gnu_attr[Tag_GNU_MSP430_Data_Region].i
- == Val_GNU_MSP430_Data_Region_Lower);
- bool obfd_lower_region_used
- = (out_gnu_attr[Tag_GNU_MSP430_Data_Region].i
- == Val_GNU_MSP430_Data_Region_Lower);
- if (ibfd_lower_region_used != obfd_lower_region_used)
- {
- _bfd_error_handler
- (_("error: %pB can use the upper region for data, "
- "but %pB assumes data is exclusively in lower memory"),
- ibfd_lower_region_used ? obfd : ibfd,
- ibfd_lower_region_used ? ibfd : obfd);
- result = false;
- }
- }
- return result;
- }
- /* Merge backend specific data from an object file to the output
- object file when linking. */
- static bool
- elf32_msp430_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
- {
- bfd *obfd = info->output_bfd;
- /* 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_msp430_attributes (ibfd, info);
- }
- static bool
- msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
- {
- return _bfd_elf_is_local_label_name (abfd, sym->name);
- }
- static bool
- uses_large_model (bfd *abfd)
- {
- obj_attribute * attr;
- if (abfd->flags & BFD_LINKER_CREATED)
- return false;
- attr = elf_known_obj_attributes_proc (abfd);
- if (attr == NULL)
- return false;
- return attr[OFBA_MSPABI_Tag_Code_Model].i == 2;
- }
- static unsigned int
- elf32_msp430_eh_frame_address_size (bfd *abfd,
- const asection *sec ATTRIBUTE_UNUSED)
- {
- return uses_large_model (abfd) ? 4 : 2;
- }
- /* 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_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size
- #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 }
- };
- #undef elf_backend_special_sections
- #define elf_backend_special_sections msp430_ti_elf_special_sections
- #include "elf32-target.h"
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