751 lines
18 KiB
C
751 lines
18 KiB
C
/* BFD back-end for ARM COFF files.
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Copyright 1990, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
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Written by Cygnus Support.
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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/arm.h"
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#include "coff/internal.h"
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#ifdef COFF_WITH_PE
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#include "coff/pe.h"
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#endif
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#include "libcoff.h"
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static bfd_reloc_status_type
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aoutarm_fix_pcrel_26_done PARAMS ((bfd *, arelent *, asymbol *, PTR,
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asection *, bfd *, char **));
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static bfd_reloc_status_type
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aoutarm_fix_pcrel_26 PARAMS ((bfd *, arelent *, asymbol *, PTR,
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asection *, bfd *, char **));
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static bfd_reloc_status_type coff_arm_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static boolean coff_arm_adjust_symndx
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
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struct internal_reloc *, boolean *));
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/* Used by the assembler. */
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static bfd_reloc_status_type
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coff_arm_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;
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bfd *output_bfd;
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char **error_message;
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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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diff = reloc_entry->addend;
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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 true
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#endif
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static reloc_howto_type aoutarm_std_reloc_howto[] =
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{
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/* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
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HOWTO(0, /* type */
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0, /* rs */
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0, /* size */
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8, /* bsz */
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false, /* pcrel */
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0, /* bitpos */
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complain_overflow_bitfield, /* ovf */
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coff_arm_reloc, /* sf */
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"8", /*name */
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true, /* partial */
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0x000000ff, /*read mask */
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0x000000ff, /* setmask */
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PCRELOFFSET /* pcdone */),
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HOWTO(1,
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0,
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1,
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16,
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false,
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0,
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complain_overflow_bitfield,
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coff_arm_reloc,
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"16",
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true,
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0x0000ffff,
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0x0000ffff,
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PCRELOFFSET),
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HOWTO( 2,
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0,
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2,
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32,
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false,
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0,
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complain_overflow_bitfield,
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coff_arm_reloc,
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"32",
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true,
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0xffffffff,
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0xffffffff,
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PCRELOFFSET),
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HOWTO( 3,
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2,
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2,
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26,
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true,
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0,
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complain_overflow_signed,
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aoutarm_fix_pcrel_26 ,
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"ARM26",
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false,
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0x00ffffff,
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0x00ffffff,
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PCRELOFFSET),
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HOWTO( 4,
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0,
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0,
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8,
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true,
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0,
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complain_overflow_signed,
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coff_arm_reloc,
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"DISP8",
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true,
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0x000000ff,
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0x000000ff,
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true),
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HOWTO( 5,
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0,
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1,
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16,
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true,
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0,
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complain_overflow_signed,
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coff_arm_reloc,
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"DISP16",
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true,
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0x0000ffff,
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0x0000ffff,
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true),
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HOWTO( 6,
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0,
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2,
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32,
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true,
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0,
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complain_overflow_signed,
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coff_arm_reloc,
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"DISP32",
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true,
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0xffffffff,
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0xffffffff,
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true),
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HOWTO( 7,
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2,
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2,
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26,
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false,
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0,
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complain_overflow_signed,
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aoutarm_fix_pcrel_26_done,
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"ARM26D",
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true,
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0x00ffffff,
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0x0,
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false),
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{-1},
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HOWTO( 9,
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0,
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-1,
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16,
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false,
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0,
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complain_overflow_bitfield,
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coff_arm_reloc,
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"NEG16",
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true,
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0x0000ffff,
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0x0000ffff,
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false),
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HOWTO( 10,
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0,
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-2,
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32,
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false,
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0,
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complain_overflow_bitfield,
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coff_arm_reloc,
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"NEG32",
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true,
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0xffffffff,
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0xffffffff,
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false),
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HOWTO( 11,
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0,
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2,
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32,
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false,
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0,
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complain_overflow_bitfield,
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coff_arm_reloc,
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"rva32",
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true,
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0xffffffff,
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0xffffffff,
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PCRELOFFSET),
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};
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#ifdef COFF_WITH_PE
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/* Return true if this relocation should
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appear in the output .reloc section. */
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static boolean in_reloc_p (abfd, howto)
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bfd * abfd;
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reloc_howto_type *howto;
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{
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return !howto->pc_relative && howto->type != 11;
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}
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#endif
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#define RTYPE2HOWTO(cache_ptr, dst) \
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(cache_ptr)->howto = aoutarm_std_reloc_howto + (dst)->r_type;
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#define coff_rtype_to_howto coff_arm_rtype_to_howto
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static reloc_howto_type *
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coff_arm_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
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bfd *abfd;
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asection *sec;
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struct internal_reloc *rel;
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struct coff_link_hash_entry *h;
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struct internal_syment *sym;
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bfd_vma *addendp;
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{
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reloc_howto_type *howto;
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howto = aoutarm_std_reloc_howto + rel->r_type;
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if (rel->r_type == 11)
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{
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*addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
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}
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/* The relocation_section function will skip pcrel_offset relocs
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when doing a relocateable link. However, we want to convert
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ARM26 to ARM26D relocs if possible. We return a fake howto in
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this case without pcrel_offset set, and adjust the addend to
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compensate. */
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if (rel->r_type == 3
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&& h != NULL
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&& (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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&& h->root.u.def.section->output_section == sec->output_section)
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{
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static reloc_howto_type fake_arm26_reloc =
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HOWTO (3,
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2,
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2,
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26,
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true,
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0,
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complain_overflow_signed,
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aoutarm_fix_pcrel_26 ,
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"ARM26",
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false,
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0x00ffffff,
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0x00ffffff,
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false);
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*addendp -= rel->r_vaddr - sec->vma;
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return &fake_arm26_reloc;
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}
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return howto;
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}
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/* Used by the assembler. */
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static bfd_reloc_status_type
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aoutarm_fix_pcrel_26_done (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, 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;
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bfd *output_bfd;
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char **error_message;
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{
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/* This is dead simple at present. */
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return bfd_reloc_ok;
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}
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/* Used by the assembler. */
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static bfd_reloc_status_type
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aoutarm_fix_pcrel_26 (abfd, reloc_entry, symbol, data, input_section,
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output_bfd, 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;
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bfd *output_bfd;
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char **error_message;
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{
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bfd_vma relocation;
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bfd_size_type addr = reloc_entry->address;
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long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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bfd_reloc_status_type flag = bfd_reloc_ok;
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/* If this is an undefined symbol, return error */
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if (symbol->section == &bfd_und_section
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&& (symbol->flags & BSF_WEAK) == 0)
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return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
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/* If the sections are different, and we are doing a partial relocation,
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just ignore it for now. */
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if (symbol->section->name != input_section->name
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&& output_bfd != (bfd *)NULL)
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return bfd_reloc_continue;
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relocation = (target & 0x00ffffff) << 2;
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relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */
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relocation += symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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relocation += reloc_entry->addend;
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relocation -= input_section->output_section->vma;
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relocation -= input_section->output_offset;
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relocation -= addr;
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if (relocation & 3)
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return bfd_reloc_overflow;
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/* Check for overflow */
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if (relocation & 0x02000000)
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{
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if ((relocation & ~0x03ffffff) != ~0x03ffffff)
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flag = bfd_reloc_overflow;
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}
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else if (relocation & ~0x03ffffff)
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flag = bfd_reloc_overflow;
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target &= ~0x00ffffff;
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target |= (relocation >> 2) & 0x00ffffff;
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bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
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/* Now the ARM magic... Change the reloc type so that it is marked as done.
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Strictly this is only necessary if we are doing a partial relocation. */
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reloc_entry->howto = &aoutarm_std_reloc_howto[7];
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return flag;
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}
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static CONST struct reloc_howto_struct *
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arm_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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#define ASTD(i,j) case i: return &aoutarm_std_reloc_howto[j]
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if (code == BFD_RELOC_CTOR)
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switch (bfd_get_arch_info (abfd)->bits_per_address)
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{
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case 32:
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code = BFD_RELOC_32;
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break;
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default: return (CONST struct reloc_howto_struct *) 0;
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}
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switch (code)
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{
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ASTD (BFD_RELOC_16, 1);
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ASTD (BFD_RELOC_32, 2);
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ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
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ASTD (BFD_RELOC_8_PCREL, 4);
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ASTD (BFD_RELOC_16_PCREL, 5);
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ASTD (BFD_RELOC_32_PCREL, 6);
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ASTD (BFD_RELOC_RVA, 11);
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default: return (CONST struct reloc_howto_struct *) 0;
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}
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}
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#define coff_bfd_reloc_type_lookup arm_reloc_type_lookup
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
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#define COFF_PAGE_SIZE 0x1000
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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) ARMBADMAG(x)
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#define ARM 1 /* Customize coffcode.h */
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/* We use the special COFF backend linker. */
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#define coff_relocate_section _bfd_coff_generic_relocate_section
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/* When doing a relocateable link, we want to convert ARM26 relocs
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into ARM26D relocs. */
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static boolean
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coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
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bfd *obfd;
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struct bfd_link_info *info;
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bfd *ibfd;
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asection *sec;
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struct internal_reloc *irel;
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boolean *adjustedp;
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{
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if (irel->r_type == 3)
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{
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struct coff_link_hash_entry *h;
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h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
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if (h != NULL
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&& (h->root.type == bfd_link_hash_defined
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|| h->root.type == bfd_link_hash_defweak)
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&& h->root.u.def.section->output_section == sec->output_section)
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irel->r_type = 7;
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}
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*adjustedp = false;
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return true;
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}
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#define APCS_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26)
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#define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET)
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#define SET_APCS_FLAG( abfd, flg ) (coff_data (abfd)->flags = (coff_data (abfd)->flags & ~ F_APCS_26) | (flg | F_APCS_SET))
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/* Called when merging the private data areas of two BFDs.
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This is important as it allows us to detect if we are
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attempting to merge binaries compiled for different ARM
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targets, eg different CPUs or differents APCS's. */
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static boolean
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coff_arm_bfd_merge_private_bfd_data (ibfd, obfd)
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bfd * ibfd;
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bfd * obfd;
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{
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BFD_ASSERT (ibfd != NULL && obfd != NULL);
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if (ibfd == obfd)
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return true;
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/* If the two formats are different we cannot check anything */
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if (ibfd->xvec != obfd->xvec)
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return true;
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/* Verify that the APCS is the same for the two BFDs */
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if (APCS_SET (ibfd))
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{
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if (APCS_SET (obfd))
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{
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/* If the src and dest have different APCS flag bits set, fail */
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if (APCS_FLAG (obfd) != APCS_FLAG (ibfd))
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{
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_bfd_error_handler
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("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d",
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bfd_get_filename (ibfd), APCS_FLAG (ibfd) ? 26 : 32,
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bfd_get_filename (obfd), APCS_FLAG (obfd) ? 26 : 32
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);
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bfd_set_error (bfd_error_wrong_format);
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return false;
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}
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}
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else
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{
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SET_APCS_FLAG (obfd, APCS_FLAG (ibfd));
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/* Set up the arch and fields as well as these are probably wrong */
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bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
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}
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}
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return true;
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}
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/* Display the flags field */
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static boolean
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coff_arm_bfd_print_private_bfd_data (abfd, ptr)
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bfd * abfd;
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PTR ptr;
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{
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FILE * file = (FILE *) ptr;
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BFD_ASSERT (abfd != NULL && ptr != NULL)
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fprintf (file, "private flags = %x", coff_data( abfd )->flags);
|
|
|
|
if (APCS_SET (abfd))
|
|
fprintf (file, ": [APCS-%d]", APCS_FLAG( abfd ) ? 26 : 32);
|
|
|
|
fputc ('\n', file);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* Copies the given flags into the coff_tdata.flags field.
|
|
Typically these flags come from the f_flags[] field of
|
|
the COFF filehdr structure, which contains important,
|
|
target specific information. */
|
|
|
|
boolean
|
|
coff_arm_bfd_set_private_flags (abfd, flags)
|
|
bfd * abfd;
|
|
flagword flags;
|
|
{
|
|
int flag;
|
|
|
|
BFD_ASSERT (abfd != NULL);
|
|
|
|
flag = (flags & F_APCS26) ? F_APCS_26 : 0;
|
|
|
|
/* Make sure that the APCS field has not been initialised to the opposite value */
|
|
if (APCS_SET (abfd) && (APCS_FLAG (abfd) != flag))
|
|
return false;
|
|
|
|
SET_APCS_FLAG (abfd, flag);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* Copy the important parts of the target specific data
|
|
from one instance of a BFD to another. */
|
|
|
|
static boolean
|
|
coff_arm_bfd_copy_private_bfd_data (src, dest)
|
|
bfd * src;
|
|
bfd * dest;
|
|
{
|
|
BFD_ASSERT (src != NULL && dest != NULL);
|
|
|
|
if (src == dest)
|
|
return true;
|
|
|
|
/* If the destination is not in the same format as the source, do not do the copy */
|
|
if (src->xvec != dest->xvec)
|
|
return true;
|
|
|
|
/* copy the flags field */
|
|
if (APCS_SET (src))
|
|
{
|
|
if (APCS_SET (dest))
|
|
{
|
|
/* If the src and dest have different APCS flag bits set, fail */
|
|
if (APCS_FLAG (dest) != APCS_FLAG (src))
|
|
return false;
|
|
}
|
|
else
|
|
SET_APCS_FLAG (dest, APCS_FLAG (src));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
#define coff_adjust_symndx coff_arm_adjust_symndx
|
|
#define coff_bfd_merge_private_bfd_data coff_arm_bfd_merge_private_bfd_data
|
|
#define coff_bfd_print_private_bfd_data coff_arm_bfd_print_private_bfd_data
|
|
#define coff_bfd_set_private_flags coff_arm_bfd_set_private_flags
|
|
#define coff_bfd_copy_private_bfd_data coff_arm_bfd_copy_private_bfd_data
|
|
|
|
#include "coffcode.h"
|
|
|
|
const bfd_target
|
|
#ifdef TARGET_LITTLE_SYM
|
|
TARGET_LITTLE_SYM =
|
|
#else
|
|
armcoff_little_vec =
|
|
#endif
|
|
{
|
|
#ifdef TARGET_LITTLE_NAME
|
|
TARGET_LITTLE_NAME,
|
|
#else
|
|
"coff-arm-little",
|
|
#endif
|
|
bfd_target_coff_flavour,
|
|
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
|
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
|
|
|
#ifndef COFF_WITH_PE
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
|
#else
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
|
|
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
|
|
#endif
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
TARGET_UNDERSCORE, /* leading underscore */
|
|
#else
|
|
0, /* leading underscore */
|
|
#endif
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
|
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
|
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
|
bfd_generic_archive_p, coff_object_p},
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
|
bfd_false},
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
|
_bfd_write_archive_contents, bfd_false},
|
|
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
|
BFD_JUMP_TABLE_COPY (coff),
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
|
BFD_JUMP_TABLE_LINK (coff),
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
|
|
|
COFF_SWAP_TABLE,
|
|
};
|
|
|
|
const bfd_target
|
|
#ifdef TARGET_BIG_SYM
|
|
TARGET_BIG_SYM =
|
|
#else
|
|
armcoff_big_vec =
|
|
#endif
|
|
{
|
|
#ifdef TARGET_BIG_NAME
|
|
TARGET_BIG_NAME,
|
|
#else
|
|
"coff-arm-big",
|
|
#endif
|
|
bfd_target_coff_flavour,
|
|
BFD_ENDIAN_BIG, /* data byte order is big */
|
|
BFD_ENDIAN_BIG, /* header byte order is big */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
|
|
|
#ifndef COFF_WITH_PE
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
|
#else
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
|
|
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
|
|
#endif
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
TARGET_UNDERSCORE, /* leading underscore */
|
|
#else
|
|
0, /* leading underscore */
|
|
#endif
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
|
|
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
|
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
|
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
|
|
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
|
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
|
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
|
|
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
|
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
|
bfd_generic_archive_p, coff_object_p},
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
|
bfd_false},
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
|
_bfd_write_archive_contents, bfd_false},
|
|
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
|
BFD_JUMP_TABLE_COPY (coff),
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
|
BFD_JUMP_TABLE_LINK (coff),
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
|
|
|
COFF_SWAP_TABLE,
|
|
};
|