c152c7961c
* Makefile.in: Regenerate. * bfd-in.h (bfd_elf_discard_info): Declare. (bfd_elf32_discard_info, bfd_elf64_discard_info): Delete. * bfd-in2.h: Regenerate. * elf-bfd.h (bfd_elf32_print_symbol, bfd_elf64_print_symbol, bfd_elf32_link_record_dynamic_symbol, bfd_elf64_link_record_dynamic_symbol, _bfd_elf_link_record_dynamic_symbol, bfd_elf32_bfd_final_link, bfd_elf64_bfd_final_link, elf_link_record_local_dynamic_symbol, _bfd_elf32_link_record_local_dynamic_symbol, _bfd_elf64_link_record_local_dynamic_symbol, _bfd_elf32_gc_sections, _bfd_elf32_gc_common_finalize_got_offsets, _bfd_elf32_gc_common_final_link, _bfd_elf64_gc_common_final_link, _bfd_elf32_gc_record_vtinherit, _bfd_elf32_gc_record_vtentry, _bfd_elf64_gc_sections, _bfd_elf64_gc_common_finalize_got_offsets, _bfd_elf64_gc_record_vtinherit, _bfd_elf64_gc_record_vtentry, _bfd_elf32_reloc_symbol_deleted_p, _bfd_elf64_reloc_symbol_deleted_p): Delete. (bfd_elf_link_record_dynamic_symbol, bfd_elf_link_record_local_dynamic_symbol, bfd_elf_final_link, bfd_elf_gc_sections, bfd_elf_gc_record_vtinherit, bfd_elf_gc_record_vtentry, bfd_elf_gc_common_finalize_got_offsets, bfd_elf_gc_common_final_link, bfd_elf_reloc_symbol_deleted_p): Declare. (WILL_CALL_FINISH_DYNAMIC_SYMBOL): Define. * elf32-arm.h: Update for changed function names. Remove local WILL_CALL_FINISH_DYNAMIC_SECTION define. * elf-hppa.h, elf-m10300.c, elf32-cris.c, elf32-d10v.c, elf32-dlx.c, * elf32-fr30.c, elf32-frv.c, elf32-h8300.c, elf32-hppa.c, elf32-i386.c, * elf32-iq2000.c, elf32-m32r.c, elf32-m68hc1x.c, elf32-m68k.c, * elf32-mcore.c, elf32-openrisc.c, elf32-ppc.c, elf32-s390.c, * elf32-sh.c, elf32-sparc.c, elf32-v850.c, elf32-vax.c, * elf32-xstormy16.c, elf32-xtensa.c, elf64-alpha.c, elf64-hppa.c, * elf64-mmix.c, elf64-ppc.c, elf64-s390.c, elf64-sh64.c, elf64-sparc.c, * elf64-x86-64.c, elfxx-ia64.c, elfxx-mips.c, elfxx-target.h: Likewise. * elfxx-target.h (bfd_elfNN_bfd_final_link): Define. (bfd_elfNN_print_symbol): Define. * elfcode.h: Don't include elflink.h. (elf_bfd_discard_info, elf_reloc_symbol_deleted_p, elf_link_record_dynamic_symbol, elf_bfd_final_link, elf_gc_sections, elf_gc_common_finalize_got_offsets, elf_gc_common_final_link, elf_gc_record_vtinherit, elf_gc_record_vtentry, elf_link_record_local_dynamic_symbol): Don't define. * elflink.c: Update for changed function names. Move elflink.h code here. * elflink.h: Delete file. * po/SRC-POTFILES.in: Regenerate. * po/bfd.pot: Regenerate. doc/ * bfdint.texi: Remove all mention of elflink.h.
1087 lines
32 KiB
C
1087 lines
32 KiB
C
/* XSTORMY16-specific support for 32-bit ELF.
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Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 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/xstormy16.h"
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#include "libiberty.h"
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/* Forward declarations. */
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static reloc_howto_type * xstormy16_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void xstormy16_info_to_howto_rela
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static bfd_reloc_status_type xstormy16_elf_24_reloc
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PARAMS ((bfd *abfd, arelent *reloc_entry, asymbol *symbol,
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PTR data, asection *input_section, bfd *output_bfd,
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char **error_message));
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static bfd_boolean xstormy16_elf_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_boolean xstormy16_relax_plt_check
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean xstormy16_relax_plt_realloc
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static bfd_boolean xstormy16_elf_relax_section
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PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
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bfd_boolean *again));
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static bfd_boolean xstormy16_elf_always_size_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean xstormy16_elf_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 bfd_boolean xstormy16_elf_finish_dynamic_sections
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PARAMS((bfd *, struct bfd_link_info *));
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static bfd_boolean xstormy16_elf_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 asection * xstormy16_elf_gc_mark_hook
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PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static reloc_howto_type xstormy16_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_XSTORMY16_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_XSTORMY16_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_XSTORMY16_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_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_XSTORMY16_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* An 8 bit absolute relocation. */
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HOWTO (R_XSTORMY16_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 32 bit pc-relative relocation. */
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HOWTO (R_XSTORMY16_PC32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_PC32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 16 bit pc-relative relocation. */
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HOWTO (R_XSTORMY16_PC16, /* 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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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_PC16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* An 8 bit pc-relative relocation. */
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HOWTO (R_XSTORMY16_PC8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_PC8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 12-bit pc-relative relocation suitable for the branch instructions. */
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HOWTO (R_XSTORMY16_REL_12, /* type */
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1, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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11, /* bitsize */
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TRUE, /* pc_relative */
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1, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_REL_12", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x0ffe, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 24-bit absolute relocation suitable for the jump instructions. */
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HOWTO (R_XSTORMY16_24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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24, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_unsigned, /* complain_on_overflow */
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xstormy16_elf_24_reloc, /* special_function */
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"R_XSTORMY16_24", /* name */
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TRUE, /* partial_inplace */
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0, /* src_mask */
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0xffff00ff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* A 16 bit absolute relocation to a function pointer. */
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HOWTO (R_XSTORMY16_FPTR16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_FPTR16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* Low order 16 bit value of a high memory address. */
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HOWTO (R_XSTORMY16_LO16, /* 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_XSTORMY16_LO16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* High order 16 bit value of a high memory address. */
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HOWTO (R_XSTORMY16_HI16, /* type */
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16, /* 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_XSTORMY16_HI16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 12 bit absolute relocation. */
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HOWTO (R_XSTORMY16_12, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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12, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_XSTORMY16_12", /* name */
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FALSE, /* partial_inplace */
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0x0000, /* src_mask */
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0x0fff, /* dst_mask */
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FALSE), /* pcrel_offset */
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};
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static reloc_howto_type xstormy16_elf_howto_table2 [] =
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{
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_XSTORMY16_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_XSTORMY16_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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||
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||
/* GNU extension to record C++ vtable member usage */
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||
HOWTO (R_XSTORMY16_GNU_VTENTRY, /* type */
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||
0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
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||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
||
"R_XSTORMY16_GNU_VTENTRY", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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};
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/* Map BFD reloc types to XSTORMY16 ELF reloc types. */
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||
|
||
typedef struct xstormy16_reloc_map
|
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{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned int xstormy16_reloc_val;
|
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reloc_howto_type * table;
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||
} reloc_map;
|
||
|
||
static const reloc_map xstormy16_reloc_map [] =
|
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{
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{ BFD_RELOC_NONE, R_XSTORMY16_NONE, xstormy16_elf_howto_table },
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{ BFD_RELOC_32, R_XSTORMY16_32, xstormy16_elf_howto_table },
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{ BFD_RELOC_16, R_XSTORMY16_16, xstormy16_elf_howto_table },
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{ BFD_RELOC_8, R_XSTORMY16_8, xstormy16_elf_howto_table },
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{ BFD_RELOC_32_PCREL, R_XSTORMY16_PC32, xstormy16_elf_howto_table },
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{ BFD_RELOC_16_PCREL, R_XSTORMY16_PC16, xstormy16_elf_howto_table },
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{ BFD_RELOC_8_PCREL, R_XSTORMY16_PC8, xstormy16_elf_howto_table },
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{ BFD_RELOC_XSTORMY16_REL_12, R_XSTORMY16_REL_12, xstormy16_elf_howto_table },
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{ BFD_RELOC_XSTORMY16_24, R_XSTORMY16_24, xstormy16_elf_howto_table },
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{ BFD_RELOC_XSTORMY16_FPTR16, R_XSTORMY16_FPTR16, xstormy16_elf_howto_table },
|
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{ BFD_RELOC_LO16, R_XSTORMY16_LO16, xstormy16_elf_howto_table },
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{ BFD_RELOC_HI16, R_XSTORMY16_HI16, xstormy16_elf_howto_table },
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{ BFD_RELOC_XSTORMY16_12, R_XSTORMY16_12, xstormy16_elf_howto_table },
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{ BFD_RELOC_VTABLE_INHERIT, R_XSTORMY16_GNU_VTINHERIT, xstormy16_elf_howto_table2 },
|
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{ BFD_RELOC_VTABLE_ENTRY, R_XSTORMY16_GNU_VTENTRY, xstormy16_elf_howto_table2 },
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
xstormy16_reloc_type_lookup (abfd, code)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = ARRAY_SIZE (xstormy16_reloc_map); --i;)
|
||
{
|
||
const reloc_map * entry;
|
||
|
||
entry = xstormy16_reloc_map + i;
|
||
|
||
if (entry->bfd_reloc_val == code)
|
||
return entry->table + (entry->xstormy16_reloc_val
|
||
- entry->table[0].type);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for an XSTORMY16 ELF reloc. */
|
||
|
||
static void
|
||
xstormy16_info_to_howto_rela (abfd, cache_ptr, dst)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
arelent * cache_ptr;
|
||
Elf_Internal_Rela * dst;
|
||
{
|
||
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
||
if (r_type <= (unsigned int) R_XSTORMY16_12)
|
||
cache_ptr->howto = &xstormy16_elf_howto_table [r_type];
|
||
else if (r_type - R_XSTORMY16_GNU_VTINHERIT
|
||
<= (unsigned int) R_XSTORMY16_GNU_VTENTRY)
|
||
cache_ptr->howto
|
||
= &xstormy16_elf_howto_table2 [r_type - R_XSTORMY16_GNU_VTINHERIT];
|
||
else
|
||
abort ();
|
||
}
|
||
|
||
/* Handle the R_XSTORMY16_24 reloc, which has an odd bit arrangement. */
|
||
|
||
static bfd_reloc_status_type
|
||
xstormy16_elf_24_reloc (abfd, reloc_entry, symbol, data, input_section,
|
||
output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
bfd_vma relocation, x;
|
||
|
||
if (output_bfd != NULL)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
|
||
x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
x &= 0x0000ff00;
|
||
x |= relocation & 0xff;
|
||
x |= (relocation << 8) & 0xffff0000;
|
||
bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocation & ~ (bfd_vma) 0xffffff)
|
||
return bfd_reloc_overflow;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* We support 16-bit pointers to code above 64k by generating a thunk
|
||
below 64k containing a JMPF instruction to the final address. We
|
||
cannot, unfortunately, minimize the number of thunks unless the
|
||
-relax switch is given, as otherwise we have no idea where the
|
||
sections will fall in the address space. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
bfd_vma *local_plt_offsets;
|
||
asection *splt;
|
||
bfd *dynobj;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_plt_offsets = elf_local_got_offsets (abfd);
|
||
splt = NULL;
|
||
dynobj = elf_hash_table(info)->dynobj;
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; ++rel)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma *offset;
|
||
|
||
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;
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes a 16-bit pointer to a function.
|
||
We may need to allocate a thunk in low memory; reserve memory
|
||
for it now. */
|
||
case R_XSTORMY16_FPTR16:
|
||
if (rel->r_addend != 0)
|
||
{
|
||
(*info->callbacks->warning)
|
||
(info, _("non-zero addend in @fptr reloc"), 0,
|
||
abfd, 0, 0);
|
||
}
|
||
|
||
if (dynobj == NULL)
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_make_section (dynobj, ".plt");
|
||
if (splt == NULL
|
||
|| ! bfd_set_section_flags (dynobj, splt,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY
|
||
| SEC_CODE))
|
||
|| ! bfd_set_section_alignment (dynobj, splt, 1))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
offset = &h->plt.offset;
|
||
else
|
||
{
|
||
if (local_plt_offsets == NULL)
|
||
{
|
||
size_t size;
|
||
unsigned int i;
|
||
|
||
size = symtab_hdr->sh_info * sizeof (bfd_vma);
|
||
local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
|
||
if (local_plt_offsets == NULL)
|
||
return FALSE;
|
||
elf_local_got_offsets (abfd) = local_plt_offsets;
|
||
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
local_plt_offsets[i] = (bfd_vma) -1;
|
||
}
|
||
offset = &local_plt_offsets[r_symndx];
|
||
}
|
||
|
||
if (*offset == (bfd_vma) -1)
|
||
{
|
||
*offset = splt->_raw_size;
|
||
splt->_raw_size += 4;
|
||
}
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_XSTORMY16_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_XSTORMY16_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
|
||
is within the low 64k, remove any entry for it in the plt. */
|
||
|
||
struct relax_plt_data
|
||
{
|
||
asection *splt;
|
||
bfd_boolean *again;
|
||
};
|
||
|
||
static bfd_boolean
|
||
xstormy16_relax_plt_check (h, xdata)
|
||
struct elf_link_hash_entry *h;
|
||
PTR xdata;
|
||
{
|
||
struct relax_plt_data *data = (struct relax_plt_data *) xdata;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
bfd_vma address;
|
||
|
||
if (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
address = 0;
|
||
else
|
||
address = (h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset
|
||
+ h->root.u.def.value);
|
||
|
||
if (address <= 0xffff)
|
||
{
|
||
h->plt.offset = -1;
|
||
data->splt->_cooked_size -= 4;
|
||
*data->again = TRUE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* A subroutine of xstormy16_elf_relax_section. If the global symbol H
|
||
previously had a plt entry, give it a new entry offset. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_relax_plt_realloc (h, xdata)
|
||
struct elf_link_hash_entry *h;
|
||
PTR xdata;
|
||
{
|
||
bfd_vma *entry = (bfd_vma *) xdata;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
h->plt.offset = *entry;
|
||
*entry += 4;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_relax_section (dynobj, splt, info, again)
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
struct bfd_link_info *info;
|
||
bfd_boolean *again;
|
||
{
|
||
struct relax_plt_data relax_plt_data;
|
||
bfd *ibfd;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = FALSE;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
/* We only relax the .plt section at the moment. */
|
||
if (dynobj != elf_hash_table (info)->dynobj
|
||
|| strcmp (splt->name, ".plt") != 0)
|
||
return TRUE;
|
||
|
||
/* Quick check for an empty plt. */
|
||
if (splt->_raw_size == 0)
|
||
return TRUE;
|
||
|
||
/* If this is the first time we have been called for this section,
|
||
initialize the cooked size. */
|
||
if (splt->_cooked_size == 0)
|
||
splt->_cooked_size = splt->_raw_size;
|
||
|
||
/* Map across all global symbols; see which ones happen to
|
||
fall in the low 64k. */
|
||
relax_plt_data.splt = splt;
|
||
relax_plt_data.again = again;
|
||
elf_link_hash_traverse (elf_hash_table (info), xstormy16_relax_plt_check,
|
||
&relax_plt_data);
|
||
|
||
/* Likewise for local symbols, though that's somewhat less convenient
|
||
as we have to walk the list of input bfds and swap in symbol data. */
|
||
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
unsigned int idx;
|
||
|
||
if (! local_plt_offsets)
|
||
continue;
|
||
|
||
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
||
if (symtab_hdr->sh_info != 0)
|
||
{
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
|
||
symtab_hdr->sh_info, 0,
|
||
NULL, NULL, NULL);
|
||
if (isymbuf == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
|
||
{
|
||
Elf_Internal_Sym *isym;
|
||
asection *tsec;
|
||
bfd_vma address;
|
||
|
||
if (local_plt_offsets[idx] == (bfd_vma) -1)
|
||
continue;
|
||
|
||
isym = &isymbuf[idx];
|
||
if (isym->st_shndx == SHN_UNDEF)
|
||
continue;
|
||
else if (isym->st_shndx == SHN_ABS)
|
||
tsec = bfd_abs_section_ptr;
|
||
else if (isym->st_shndx == SHN_COMMON)
|
||
tsec = bfd_com_section_ptr;
|
||
else
|
||
tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
|
||
|
||
address = (tsec->output_section->vma
|
||
+ tsec->output_offset
|
||
+ isym->st_value);
|
||
if (address <= 0xffff)
|
||
{
|
||
local_plt_offsets[idx] = -1;
|
||
splt->_cooked_size -= 4;
|
||
*again = TRUE;
|
||
}
|
||
}
|
||
|
||
if (isymbuf != NULL
|
||
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
{
|
||
if (! info->keep_memory)
|
||
free (isymbuf);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If we changed anything, walk the symbols again to reallocate
|
||
.plt entry addresses. */
|
||
if (*again && splt->_cooked_size > 0)
|
||
{
|
||
bfd_vma entry = 0;
|
||
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
xstormy16_relax_plt_realloc, &entry);
|
||
|
||
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
|
||
{
|
||
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
|
||
unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
|
||
unsigned int idx;
|
||
|
||
if (! local_plt_offsets)
|
||
continue;
|
||
|
||
for (idx = 0; idx < nlocals; ++idx)
|
||
if (local_plt_offsets[idx] != (bfd_vma) -1)
|
||
{
|
||
local_plt_offsets[idx] = entry;
|
||
entry += 4;
|
||
}
|
||
}
|
||
}
|
||
|
||
splt->_raw_size = splt->_cooked_size;
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_always_size_sections (output_bfd, info)
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
|
||
splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->_raw_size);
|
||
if (splt->contents == NULL)
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Relocate an XSTORMY16 ELF section.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjusting the section contents as
|
||
necessary, and (if using Rela relocs and generating a relocatable
|
||
output file) adjusting the reloc addend as necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocatable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
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;
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
splt = NULL;
|
||
if (dynobj != NULL)
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
|
||
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);
|
||
|
||
if ( r_type == R_XSTORMY16_GNU_VTINHERIT
|
||
|| r_type == R_XSTORMY16_GNU_VTENTRY)
|
||
continue;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
howto = xstormy16_elf_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 = _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) ? bfd_section_name (input_bfd, sec) : name;
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean unresolved_reloc, warned;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_XSTORMY16_24:
|
||
{
|
||
bfd_vma reloc = relocation + rel->r_addend;
|
||
unsigned int x;
|
||
|
||
x = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
x &= 0x0000ff00;
|
||
x |= reloc & 0xff;
|
||
x |= (reloc << 8) & 0xffff0000;
|
||
bfd_put_32 (input_bfd, x, contents + rel->r_offset);
|
||
|
||
if (reloc & ~0xffffff)
|
||
r = bfd_reloc_overflow;
|
||
else
|
||
r = bfd_reloc_ok;
|
||
break;
|
||
}
|
||
|
||
case R_XSTORMY16_FPTR16:
|
||
{
|
||
bfd_vma *plt_offset;
|
||
|
||
if (h != NULL)
|
||
plt_offset = &h->plt.offset;
|
||
else
|
||
plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
|
||
|
||
if (relocation <= 0xffff)
|
||
{
|
||
/* If the symbol is in range for a 16-bit address, we should
|
||
have deallocated the plt entry in relax_section. */
|
||
BFD_ASSERT (*plt_offset == (bfd_vma) -1);
|
||
}
|
||
else
|
||
{
|
||
/* If the symbol is out of range for a 16-bit address,
|
||
we must have allocated a plt entry. */
|
||
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
|
||
|
||
/* If this is the first time we've processed this symbol,
|
||
fill in the plt entry with the correct symbol address. */
|
||
if ((*plt_offset & 1) == 0)
|
||
{
|
||
unsigned int x;
|
||
|
||
x = 0x00000200; /* jmpf */
|
||
x |= relocation & 0xff;
|
||
x |= (relocation << 8) & 0xffff0000;
|
||
bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
|
||
*plt_offset |= 1;
|
||
}
|
||
|
||
relocation = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ (*plt_offset & -2));
|
||
}
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, 0);
|
||
break;
|
||
}
|
||
|
||
default:
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
break;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
/* This must exist if dynobj is ever set. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_finish_dynamic_sections (abfd, info)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *splt;
|
||
|
||
/* As an extra sanity check, verify that all plt entries have
|
||
been filled in. */
|
||
|
||
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
|
||
&& (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
|
||
{
|
||
bfd_byte *contents = splt->contents;
|
||
unsigned int i, size = splt->_raw_size;
|
||
for (i = 0; i < size; i += 4)
|
||
{
|
||
unsigned int x = bfd_get_32 (dynobj, contents + i);
|
||
BFD_ASSERT (x != 0);
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
xstormy16_elf_gc_mark_hook (sec, info, rel, h, sym)
|
||
asection * sec;
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela * rel;
|
||
struct elf_link_hash_entry * h;
|
||
Elf_Internal_Sym * sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_XSTORMY16_GNU_VTINHERIT:
|
||
case R_XSTORMY16_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
xstormy16_elf_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info * info ATTRIBUTE_UNUSED;
|
||
asection * sec ATTRIBUTE_UNUSED;
|
||
const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
#define ELF_ARCH bfd_arch_xstormy16
|
||
#define ELF_MACHINE_CODE EM_XSTORMY16
|
||
#define ELF_MAXPAGESIZE 0x100
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_xstormy16_vec
|
||
#define TARGET_LITTLE_NAME "elf32-xstormy16"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto xstormy16_info_to_howto_rela
|
||
#define elf_backend_relocate_section xstormy16_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook xstormy16_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook xstormy16_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs xstormy16_elf_check_relocs
|
||
#define elf_backend_always_size_sections \
|
||
xstormy16_elf_always_size_sections
|
||
#define elf_backend_finish_dynamic_sections \
|
||
xstormy16_elf_finish_dynamic_sections
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup xstormy16_reloc_type_lookup
|
||
#define bfd_elf32_bfd_relax_section xstormy16_elf_relax_section
|
||
|
||
#include "elf32-target.h"
|