971 lines
29 KiB
C
971 lines
29 KiB
C
/* AVR-specific support for 32-bit ELF
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Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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Contributed by Denis Chertykov <denisc@overta.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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/avr.h"
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void avr_info_to_howto_rela
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
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static asection *elf32_avr_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean elf32_avr_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static boolean elf32_avr_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static bfd_reloc_status_type avr_final_link_relocate
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PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, bfd_vma));
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static boolean elf32_avr_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static void bfd_elf_avr_final_write_processing PARAMS ((bfd *, boolean));
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static boolean elf32_avr_object_p PARAMS ((bfd *));
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/* Use RELA instead of REL */
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#undef USE_REL
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static reloc_howto_type elf_avr_howto_table[] =
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{
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HOWTO (R_AVR_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_AVR_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_AVR_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_AVR_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 7 bit PC relative relocation. */
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HOWTO (R_AVR_7_PCREL, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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7, /* bitsize */
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true, /* pc_relative */
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3, /* 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_AVR_7_PCREL", /* 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 13 bit PC relative relocation. */
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HOWTO (R_AVR_13_PCREL, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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13, /* 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_AVR_13_PCREL", /* name */
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false, /* partial_inplace */
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0xfff, /* src_mask */
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0xfff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_AVR_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_AVR_16", /* 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_AVR_16_PM, /* 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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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_AVR_16_PM", /* 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 low 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_AVR_LO8_LDI, /* type */
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0, /* rightshift */
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1, /* 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_AVR_LO8_LDI", /* 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 high 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_AVR_HI8_LDI, /* type */
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8, /* rightshift */
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1, /* 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_AVR_HI8_LDI", /* 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 high 6 bit absolute relocation of 22 bit address.
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For LDI command. */
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HOWTO (R_AVR_HH8_LDI, /* type */
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16, /* rightshift */
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1, /* 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_AVR_HH8_LDI", /* 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 negative low 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_AVR_LO8_LDI_NEG, /* type */
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0, /* rightshift */
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1, /* 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_AVR_LO8_LDI_NEG", /* 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 hegative high 8 bit absolute relocation of 16 bit address.
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For LDI command. */
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HOWTO (R_AVR_HI8_LDI_NEG, /* type */
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8, /* rightshift */
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1, /* 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_AVR_HI8_LDI_NEG", /* 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 hegative high 6 bit absolute relocation of 22 bit address.
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For LDI command. */
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HOWTO (R_AVR_HH8_LDI_NEG, /* type */
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16, /* rightshift */
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1, /* 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_AVR_HH8_LDI_NEG", /* 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 low 8 bit absolute relocation of 24 bit program memory address.
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For LDI command. */
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HOWTO (R_AVR_LO8_LDI_PM, /* type */
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1, /* rightshift */
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1, /* 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_AVR_LO8_LDI_PM", /* 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 high 8 bit absolute relocation of 16 bit program memory address.
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For LDI command. */
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HOWTO (R_AVR_HI8_LDI_PM, /* type */
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9, /* rightshift */
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1, /* 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_AVR_HI8_LDI_PM", /* 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 high 8 bit absolute relocation of 24 bit program memory address.
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For LDI command. */
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HOWTO (R_AVR_HH8_LDI_PM, /* type */
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17, /* rightshift */
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1, /* 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_AVR_HH8_LDI_PM", /* 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 low 8 bit absolute relocation of a negative 24 bit
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program memory address. For LDI command. */
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HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */
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1, /* rightshift */
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1, /* 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_AVR_LO8_LDI_PM_NEG", /* 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 high 8 bit absolute relocation of a negative 16 bit
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program memory address. For LDI command. */
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HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */
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9, /* rightshift */
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1, /* 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_AVR_HI8_LDI_PM_NEG", /* 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 high 8 bit absolute relocation of a negative 24 bit
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program memory address. For LDI command. */
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HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */
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17, /* rightshift */
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1, /* 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_AVR_HH8_LDI_PM_NEG", /* 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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/* Relocation for CALL command in ATmega. */
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HOWTO (R_AVR_CALL, /* type */
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1, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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23, /* 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_AVR_CALL", /* 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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/* Map BFD reloc types to AVR ELF reloc types. */
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struct avr_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned int elf_reloc_val;
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};
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static const struct avr_reloc_map avr_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_AVR_NONE },
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{ BFD_RELOC_32, R_AVR_32 },
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{ BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL },
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{ BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL },
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{ BFD_RELOC_16, R_AVR_16 },
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{ BFD_RELOC_AVR_16_PM, R_AVR_16_PM },
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{ BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI},
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{ BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI },
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{ BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI },
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{ BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG },
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{ BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG },
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{ BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG },
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{ BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM },
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{ BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM },
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{ BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM },
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{ BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG },
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{ BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG },
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{ BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG },
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{ BFD_RELOC_AVR_CALL, R_AVR_CALL }
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};
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_type_lookup (abfd, code)
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bfd *abfd;
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bfd_reloc_code_real_type code;
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map);
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i++)
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{
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if (avr_reloc_map[i].bfd_reloc_val == code)
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return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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/* Set the howto pointer for an AVR ELF reloc. */
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static void
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avr_info_to_howto_rela (abfd, cache_ptr, dst)
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bfd *abfd;
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arelent *cache_ptr;
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Elf32_Internal_Rela *dst;
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_AVR_max);
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cache_ptr->howto = &elf_avr_howto_table[r_type];
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}
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static asection *
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elf32_avr_gc_mark_hook (abfd, info, rel, h, sym)
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bfd *abfd;
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struct bfd_link_info *info;
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Elf_Internal_Rela *rel;
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struct elf_link_hash_entry *h;
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Elf_Internal_Sym *sym;
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{
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if (h != NULL)
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{
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switch (ELF32_R_TYPE (rel->r_info))
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{
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default:
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switch (h->root.type)
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{
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case bfd_link_hash_defined:
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case bfd_link_hash_defweak:
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return h->root.u.def.section;
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case bfd_link_hash_common:
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return h->root.u.c.p->section;
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default:
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break;
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}
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}
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}
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else
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{
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if (!(elf_bad_symtab (abfd)
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&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
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&& !((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
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&& sym->st_shndx != SHN_COMMON))
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{
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return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static boolean
|
|
elf32_avr_gc_sweep_hook (abfd, info, sec, relocs)
|
|
bfd *abfd;
|
|
struct bfd_link_info *info;
|
|
asection *sec;
|
|
const Elf_Internal_Rela *relocs;
|
|
{
|
|
/* We don't use got and plt entries for avr. */
|
|
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 boolean
|
|
elf32_avr_check_relocs (abfd, info, sec, 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, **sym_hashes_end;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
|
|
if (info->relocateable)
|
|
return true;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
|
|
if (!elf_bad_symtab (abfd))
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
|
|
|
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];
|
|
}
|
|
|
|
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
|
|
avr_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel, relocation)
|
|
reloc_howto_type * howto;
|
|
bfd * input_bfd;
|
|
asection * input_section;
|
|
bfd_byte * contents;
|
|
Elf_Internal_Rela * rel;
|
|
bfd_vma relocation;
|
|
{
|
|
bfd_reloc_status_type r = bfd_reloc_ok;
|
|
bfd_vma x;
|
|
bfd_signed_vma srel;
|
|
|
|
switch (howto->type)
|
|
{
|
|
case R_AVR_7_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;
|
|
if (srel > ((1 << 7) - 1) || (srel < - (1 << 7)))
|
|
return bfd_reloc_overflow;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_13_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;
|
|
|
|
/* AVR addresses commands as words. */
|
|
srel >>= 1;
|
|
|
|
/* Check for overflow. */
|
|
if (srel < -2048 || srel > 2047)
|
|
{
|
|
/* Apply WRAPAROUND if possible. */
|
|
switch (bfd_get_mach (input_bfd))
|
|
{
|
|
case bfd_mach_avr2:
|
|
case bfd_mach_avr4:
|
|
break;
|
|
|
|
default:
|
|
return bfd_reloc_overflow;
|
|
}
|
|
}
|
|
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf000) | (srel & 0xfff);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_LO8_LDI:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HI8_LDI:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = (srel >> 8) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HH8_LDI:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = (srel >> 16) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_LO8_LDI_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HI8_LDI_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
srel = (srel >> 8) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HH8_LDI_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
srel = (srel >> 16) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_LO8_LDI_PM:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HI8_LDI_PM:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
srel = (srel >> 8) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HH8_LDI_PM:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
srel = (srel >> 16) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_LO8_LDI_PM_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HI8_LDI_PM_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
srel = (srel >> 8) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_HH8_LDI_PM_NEG:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
srel = -srel;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
srel = (srel >> 16) & 0xff;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00);
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
break;
|
|
|
|
case R_AVR_CALL:
|
|
contents += rel->r_offset;
|
|
srel = (bfd_signed_vma) relocation + rel->r_addend;
|
|
if (srel & 1)
|
|
return bfd_reloc_outofrange;
|
|
srel = srel >> 1;
|
|
x = bfd_get_16 (input_bfd, contents);
|
|
x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16;
|
|
bfd_put_16 (input_bfd, x, contents);
|
|
bfd_put_16 (input_bfd, srel & 0xffff, contents+2);
|
|
break;
|
|
|
|
default:
|
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel->r_offset,
|
|
relocation, rel->r_addend);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Relocate an AVR ELF section. */
|
|
static boolean
|
|
elf32_avr_relocate_section (output_bfd, info, input_bfd, input_section,
|
|
contents, relocs, local_syms, local_sections)
|
|
bfd *output_bfd;
|
|
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 (info->relocateable)
|
|
{
|
|
/* This is a relocateable link. We don't have to change
|
|
anything, unless the reloc is against a section symbol,
|
|
in which case we have to adjust according to where the
|
|
section symbol winds up in the output section. */
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
{
|
|
sec = local_sections [r_symndx];
|
|
rel->r_addend += sec->output_offset + sym->st_value;
|
|
}
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
/* This is a final link. */
|
|
howto = elf_avr_howto_table + ELF32_R_TYPE (rel->r_info);
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections [r_symndx];
|
|
relocation = (sec->output_section->vma
|
|
+ sec->output_offset
|
|
+ sym->st_value);
|
|
|
|
name = bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
|
}
|
|
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;
|
|
|
|
name = h->root.root.string;
|
|
|
|
if (h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak)
|
|
{
|
|
sec = h->root.u.def.section;
|
|
relocation = (h->root.u.def.value
|
|
+ sec->output_section->vma
|
|
+ sec->output_offset);
|
|
}
|
|
else if (h->root.type == bfd_link_hash_undefweak)
|
|
{
|
|
relocation = 0;
|
|
}
|
|
else
|
|
{
|
|
if (! ((*info->callbacks->undefined_symbol)
|
|
(info, h->root.root.string, input_bfd,
|
|
input_section, rel->r_offset, true)))
|
|
return false;
|
|
relocation = 0;
|
|
}
|
|
}
|
|
|
|
r = avr_final_link_relocate (howto, input_bfd, input_section,
|
|
contents, rel, relocation);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char * msg = (const char *) NULL;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
r = info->callbacks->reloc_overflow
|
|
(info, 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: out of range error");
|
|
break;
|
|
|
|
case bfd_reloc_notsupported:
|
|
msg = _("internal error: unsupported relocation error");
|
|
break;
|
|
|
|
case bfd_reloc_dangerous:
|
|
msg = _("internal error: dangerous relocation");
|
|
break;
|
|
|
|
default:
|
|
msg = _("internal error: unknown error");
|
|
break;
|
|
}
|
|
|
|
if (msg)
|
|
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 AVR ELF object
|
|
file. This gets the AVR architecture right based on the machine
|
|
number. */
|
|
|
|
static void
|
|
bfd_elf_avr_final_write_processing (abfd, linker)
|
|
bfd *abfd;
|
|
boolean linker ATTRIBUTE_UNUSED;
|
|
{
|
|
unsigned long val;
|
|
|
|
switch (bfd_get_mach (abfd))
|
|
{
|
|
default:
|
|
case bfd_mach_avr2:
|
|
val = E_AVR_MACH_AVR2;
|
|
break;
|
|
|
|
case bfd_mach_avr1:
|
|
val = E_AVR_MACH_AVR1;
|
|
break;
|
|
|
|
case bfd_mach_avr3:
|
|
val = E_AVR_MACH_AVR3;
|
|
break;
|
|
|
|
case bfd_mach_avr4:
|
|
val = E_AVR_MACH_AVR4;
|
|
break;
|
|
|
|
case bfd_mach_avr5:
|
|
val = E_AVR_MACH_AVR5;
|
|
break;
|
|
}
|
|
|
|
elf_elfheader (abfd)->e_machine = EM_AVR;
|
|
elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH;
|
|
elf_elfheader (abfd)->e_flags |= val;
|
|
}
|
|
|
|
/* Set the right machine number. */
|
|
|
|
static boolean
|
|
elf32_avr_object_p (abfd)
|
|
bfd *abfd;
|
|
{
|
|
int e_set = bfd_mach_avr2;
|
|
if (elf_elfheader (abfd)->e_machine == EM_AVR)
|
|
{
|
|
int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH;
|
|
switch (e_mach)
|
|
{
|
|
default:
|
|
case E_AVR_MACH_AVR2:
|
|
e_set = bfd_mach_avr2;
|
|
break;
|
|
|
|
case E_AVR_MACH_AVR1:
|
|
e_set = bfd_mach_avr1;
|
|
break;
|
|
|
|
case E_AVR_MACH_AVR3:
|
|
e_set = bfd_mach_avr3;
|
|
break;
|
|
|
|
case E_AVR_MACH_AVR4:
|
|
e_set = bfd_mach_avr4;
|
|
break;
|
|
|
|
case E_AVR_MACH_AVR5:
|
|
e_set = bfd_mach_avr5;
|
|
break;
|
|
}
|
|
}
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_avr,
|
|
e_set);
|
|
}
|
|
|
|
|
|
#define ELF_ARCH bfd_arch_avr
|
|
#define ELF_MACHINE_CODE EM_AVR
|
|
#define ELF_MAXPAGESIZE 1
|
|
|
|
#define TARGET_LITTLE_SYM bfd_elf32_avr_vec
|
|
#define TARGET_LITTLE_NAME "elf32-avr"
|
|
|
|
#define elf_info_to_howto avr_info_to_howto_rela
|
|
#define elf_info_to_howto_rel NULL
|
|
#define elf_backend_relocate_section elf32_avr_relocate_section
|
|
#define elf_backend_gc_mark_hook elf32_avr_gc_mark_hook
|
|
#define elf_backend_gc_sweep_hook elf32_avr_gc_sweep_hook
|
|
#define elf_backend_check_relocs elf32_avr_check_relocs
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_final_write_processing \
|
|
bfd_elf_avr_final_write_processing
|
|
#define elf_backend_object_p elf32_avr_object_p
|
|
|
|
|
|
#include "elf32-target.h"
|