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/* BFD back-end for Intel 860 COFF files.
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Copyright 1990, 91, 92, 93, 94, 95, 97, 1999 Free Software Foundation, Inc.
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Created mostly by substituting "860" for "386" in coff-i386.c
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Harry Dolan <dolan@ssd.intel.com>, October 1995
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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 "coff/i860.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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static bfd_reloc_status_type coff_i860_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static reloc_howto_type *coff_i860_rtype_to_howto
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PARAMS ((bfd *, asection *, struct internal_reloc *,
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struct coff_link_hash_entry *, struct internal_syment *,
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bfd_vma *));
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
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/* The page size is a guess based on ELF. */
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#define COFF_PAGE_SIZE 0x1000
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/* For some reason when using i860 COFF the value stored in the .text
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section for a reference to a common symbol is the value itself plus
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any desired offset. Ian Taylor, Cygnus Support. */
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/* If we are producing relocateable output, we need to do some
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adjustments to the object file that are not done by the
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bfd_perform_relocation function. This function is called by every
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reloc type to make any required adjustments. */
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static bfd_reloc_status_type
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coff_i860_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
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error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section ATTRIBUTE_UNUSED;
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bfd *output_bfd;
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char **error_message ATTRIBUTE_UNUSED;
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{
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symvalue diff;
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if (output_bfd == (bfd *) NULL)
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return bfd_reloc_continue;
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if (bfd_is_com_section (symbol->section))
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{
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/* We are relocating a common symbol. The current value in the
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object file is ORIG + OFFSET, where ORIG is the value of the
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common symbol as seen by the object file when it was compiled
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(this may be zero if the symbol was undefined) and OFFSET is
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the offset into the common symbol (normally zero, but may be
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non-zero when referring to a field in a common structure).
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ORIG is the negative of reloc_entry->addend, which is set by
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the CALC_ADDEND macro below. We want to replace the value in
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the object file with NEW + OFFSET, where NEW is the value of
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the common symbol which we are going to put in the final
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object file. NEW is symbol->value. */
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diff = symbol->value + reloc_entry->addend;
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}
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else
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{
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/* For some reason bfd_perform_relocation always effectively
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ignores the addend for a COFF target when producing
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relocateable output. This seems to be always wrong for 860
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COFF, so we handle the addend here instead. */
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diff = reloc_entry->addend;
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}
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#define DOIT(x) \
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x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
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if (diff != 0)
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{
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reloc_howto_type *howto = reloc_entry->howto;
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unsigned char *addr = (unsigned char *) data + reloc_entry->address;
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switch (howto->size)
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{
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case 0:
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{
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char x = bfd_get_8 (abfd, addr);
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DOIT (x);
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bfd_put_8 (abfd, x, addr);
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}
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break;
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case 1:
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{
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short x = bfd_get_16 (abfd, addr);
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DOIT (x);
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bfd_put_16 (abfd, x, addr);
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}
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break;
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case 2:
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{
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long x = bfd_get_32 (abfd, addr);
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DOIT (x);
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bfd_put_32 (abfd, x, addr);
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}
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break;
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default:
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abort ();
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}
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}
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/* Now let bfd_perform_relocation finish everything up. */
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return bfd_reloc_continue;
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}
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#ifndef PCRELOFFSET
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#define PCRELOFFSET false
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#endif
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static reloc_howto_type howto_table[] =
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{
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EMPTY_HOWTO (0),
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EMPTY_HOWTO (1),
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EMPTY_HOWTO (2),
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EMPTY_HOWTO (3),
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EMPTY_HOWTO (4),
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EMPTY_HOWTO (5),
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HOWTO (R_DIR32, /* 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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coff_i860_reloc, /* special_function */
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"dir32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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true), /* pcrel_offset */
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/* {7}, */
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HOWTO (R_IMAGEBASE, /* 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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coff_i860_reloc, /* special_function */
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"rva32", /* name */
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true, /* 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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EMPTY_HOWTO (010),
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EMPTY_HOWTO (011),
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EMPTY_HOWTO (012),
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EMPTY_HOWTO (013),
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EMPTY_HOWTO (014),
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EMPTY_HOWTO (015),
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EMPTY_HOWTO (016),
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HOWTO (R_RELBYTE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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coff_i860_reloc, /* special_function */
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"8", /* name */
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true, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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PCRELOFFSET), /* pcrel_offset */
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HOWTO (R_RELWORD, /* 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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coff_i860_reloc, /* special_function */
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"16", /* name */
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true, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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PCRELOFFSET), /* pcrel_offset */
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HOWTO (R_RELLONG, /* 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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coff_i860_reloc, /* special_function */
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"32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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PCRELOFFSET), /* pcrel_offset */
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HOWTO (R_PCRBYTE, /* 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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coff_i860_reloc, /* special_function */
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"DISP8", /* name */
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true, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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PCRELOFFSET), /* pcrel_offset */
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HOWTO (R_PCRWORD, /* 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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coff_i860_reloc, /* special_function */
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"DISP16", /* name */
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true, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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PCRELOFFSET), /* pcrel_offset */
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HOWTO (R_PCRLONG, /* 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_signed, /* complain_on_overflow */
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coff_i860_reloc, /* special_function */
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"DISP32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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PCRELOFFSET) /* pcrel_offset */
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};
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/* Turn a howto into a reloc nunmber */
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#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
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#define BADMAG(x) I860BADMAG(x)
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#define I860 1 /* Customize coffcode.h */
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#define RTYPE2HOWTO(cache_ptr, dst) \
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(cache_ptr)->howto = howto_table + (dst)->r_type;
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/* For 860 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
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library. On some other COFF targets STYP_BSS is normally
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| 275 |
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STYP_NOLOAD. */
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| 276 |
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#define BSS_NOLOAD_IS_SHARED_LIBRARY
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| 278 |
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/* Compute the addend of a reloc. If the reloc is to a common symbol,
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the object file contains the value of the common symbol. By the
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time this is called, the linker may be using a different symbol
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| 281 |
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from a different object file with a different value. Therefore, we
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| 282 |
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hack wildly to locate the original symbol from this file so that we
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| 283 |
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can make the correct adjustment. This macro sets coffsym to the
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| 284 |
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symbol from the original file, and uses it to set the addend value
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correctly. If this is not a common symbol, the usual addend
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| 286 |
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calculation is done, except that an additional tweak is needed for
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| 287 |
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PC relative relocs.
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| 288 |
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FIXME: This macro refers to symbols and asect; these are from the
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| 289 |
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calling function, not the macro arguments. */
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| 290 |
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| 291 |
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#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
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{ \
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| 293 |
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coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
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| 294 |
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if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
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| 295 |
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coffsym = (obj_symbols (abfd) \
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| 296 |
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+ (cache_ptr->sym_ptr_ptr - symbols)); \
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else if (ptr) \
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| 298 |
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coffsym = coff_symbol_from (abfd, ptr); \
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| 299 |
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if (coffsym != (coff_symbol_type *) NULL \
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| 300 |
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&& coffsym->native->u.syment.n_scnum == 0) \
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| 301 |
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cache_ptr->addend = - coffsym->native->u.syment.n_value; \
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else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
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&& ptr->section != (asection *) NULL) \
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| 304 |
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cache_ptr->addend = - (ptr->section->vma + ptr->value); \
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else \
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| 306 |
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cache_ptr->addend = 0; \
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| 307 |
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if (ptr && howto_table[reloc.r_type].pc_relative) \
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| 308 |
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cache_ptr->addend += asect->vma; \
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| 309 |
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}
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| 310 |
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| 311 |
|
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/* We use the special COFF backend linker. */
|
| 312 |
|
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#define coff_relocate_section _bfd_coff_generic_relocate_section
|
| 313 |
|
|
|
| 314 |
|
|
static reloc_howto_type *
|
| 315 |
|
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coff_i860_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
|
| 316 |
|
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bfd *abfd ATTRIBUTE_UNUSED;
|
| 317 |
|
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asection *sec;
|
| 318 |
|
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struct internal_reloc *rel;
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| 319 |
|
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struct coff_link_hash_entry *h;
|
| 320 |
|
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struct internal_syment *sym;
|
| 321 |
|
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bfd_vma *addendp;
|
| 322 |
|
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{
|
| 323 |
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| 324 |
|
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reloc_howto_type *howto;
|
| 325 |
|
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|
| 326 |
|
|
howto = howto_table + rel->r_type;
|
| 327 |
|
|
|
| 328 |
|
|
if (howto->pc_relative)
|
| 329 |
|
|
*addendp += sec->vma;
|
| 330 |
|
|
|
| 331 |
|
|
if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
|
| 332 |
|
|
{
|
| 333 |
|
|
/* This is a common symbol. The section contents include the
|
| 334 |
|
|
size (sym->n_value) as an addend. The relocate_section
|
| 335 |
|
|
function will be adding in the final value of the symbol. We
|
| 336 |
|
|
need to subtract out the current size in order to get the
|
| 337 |
|
|
correct result. */
|
| 338 |
|
|
|
| 339 |
|
|
BFD_ASSERT (h != NULL);
|
| 340 |
|
|
|
| 341 |
|
|
|
| 342 |
|
|
/* I think we *do* want to bypass this. If we don't, I have seen some data
|
| 343 |
|
|
parameters get the wrong relcation address. If I link two versions
|
| 344 |
|
|
with and without this section bypassed and then do a binary comparison,
|
| 345 |
|
|
the addresses which are different can be looked up in the map. The
|
| 346 |
|
|
case in which this section has been bypassed has addresses which correspond
|
| 347 |
|
|
to values I can find in the map */
|
| 348 |
|
|
*addendp -= sym->n_value;
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
/* If the output symbol is common (in which case this must be a
|
| 352 |
|
|
relocateable link), we need to add in the final size of the
|
| 353 |
|
|
common symbol. */
|
| 354 |
|
|
if (h != NULL && h->root.type == bfd_link_hash_common)
|
| 355 |
|
|
*addendp += h->root.u.c.size;
|
| 356 |
|
|
|
| 357 |
|
|
return howto;
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
#define coff_rtype_to_howto coff_i860_rtype_to_howto
|
| 361 |
|
|
|
| 362 |
|
|
#include "coffcode.h"
|
| 363 |
|
|
|
| 364 |
|
|
static const bfd_target *
|
| 365 |
|
|
i3coff_object_p(a)
|
| 366 |
|
|
bfd *a;
|
| 367 |
|
|
{
|
| 368 |
|
|
return coff_object_p(a);
|
| 369 |
|
|
}
|
| 370 |
|
|
|
| 371 |
|
|
const bfd_target
|
| 372 |
|
|
#ifdef TARGET_SYM
|
| 373 |
|
|
TARGET_SYM =
|
| 374 |
|
|
#else
|
| 375 |
|
|
i860coff_vec =
|
| 376 |
|
|
#endif
|
| 377 |
|
|
{
|
| 378 |
|
|
#ifdef TARGET_NAME
|
| 379 |
|
|
TARGET_NAME,
|
| 380 |
|
|
#else
|
| 381 |
|
|
"coff-i860", /* name */
|
| 382 |
|
|
#endif
|
| 383 |
|
|
bfd_target_coff_flavour,
|
| 384 |
|
|
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
| 385 |
|
|
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
| 386 |
|
|
|
| 387 |
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
| 388 |
|
|
HAS_LINENO | HAS_DEBUG |
|
| 389 |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
| 390 |
|
|
|
| 391 |
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
| 392 |
|
|
'_', /* leading underscore */
|
| 393 |
|
|
'/', /* ar_pad_char */
|
| 394 |
|
|
15, /* ar_max_namelen */
|
| 395 |
|
|
|
| 396 |
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
| 397 |
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
| 398 |
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
| 399 |
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
| 400 |
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
| 401 |
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
| 402 |
|
|
|
| 403 |
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
| 404 |
|
|
{_bfd_dummy_target, i3coff_object_p, /* bfd_check_format */
|
| 405 |
|
|
bfd_generic_archive_p, i3coff_object_p},
|
| 406 |
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
| 407 |
|
|
bfd_false},
|
| 408 |
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
| 409 |
|
|
_bfd_write_archive_contents, bfd_false},
|
| 410 |
|
|
|
| 411 |
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
| 412 |
|
|
BFD_JUMP_TABLE_COPY (coff),
|
| 413 |
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
| 414 |
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
| 415 |
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
| 416 |
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
| 417 |
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
| 418 |
|
|
BFD_JUMP_TABLE_LINK (coff),
|
| 419 |
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
| 420 |
|
|
|
| 421 |
|
|
NULL,
|
| 422 |
|
|
|
| 423 |
|
|
COFF_SWAP_TABLE
|
| 424 |
|
|
};
|
