2292 lines
62 KiB
C
2292 lines
62 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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#define APCS_26_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_26)
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#define APCS_FLOAT_FLAG( abfd ) (coff_data (abfd)->flags & F_APCS_FLOAT)
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#define PIC_FLAG( abfd ) (coff_data (abfd)->flags & F_PIC)
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#define APCS_SET( abfd ) (coff_data (abfd)->flags & F_APCS_SET)
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#define SET_APCS_FLAGS( abfd, flgs) (coff_data (abfd)->flags = \
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(coff_data (abfd)->flags & ~ (F_APCS_26 | F_APCS_FLOAT | F_PIC)) \
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| (flgs | F_APCS_SET))
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#define INTERWORK_FLAG( abfd ) (coff_data (abfd)->flags & F_INTERWORK)
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#define INTERWORK_SET( abfd ) (coff_data (abfd)->flags & F_INTERWORK_SET)
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#define SET_INTERWORK_FLAG( abfd, flg ) (coff_data (abfd)->flags = \
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(coff_data (abfd)->flags & ~ F_INTERWORK) \
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| (flg | F_INTERWORK_SET))
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static boolean coff_arm_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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struct internal_reloc *, struct internal_syment *, asection **));
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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
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coff_thumb_pcrel_23 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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coff_thumb_pcrel_12 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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coff_thumb_pcrel_9 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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coff_arm_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *,
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char **));
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static boolean
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coff_arm_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *,
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asection *, struct internal_reloc *,
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boolean *));
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/* The linker script knows the section names for placement.
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The entry_names are used to do simple name mangling on the stubs.
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Given a function name, and its type, the stub can be found. The
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name can be changed. The only requirement is the %s be present.
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*/
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#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
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#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
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#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
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#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
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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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#define TARGET_UNDERSCORE '_'
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#ifndef PCRELOFFSET
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#define PCRELOFFSET true
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#endif
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/* These most certainly belong somewhere else. Just had to get rid of
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the manifest constants in the code. */
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#define ARM_8 0
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#define ARM_16 1
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#define ARM_32 2
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#define ARM_26 3
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#define ARM_DISP8 4
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#define ARM_DISP16 5
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#define ARM_DISP32 6
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#define ARM_26D 7
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/* 8 is unused */
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#define ARM_NEG16 9
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#define ARM_NEG32 10
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#define ARM_RVA32 11
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#define ARM_THUMB9 12
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#define ARM_THUMB12 13
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#define ARM_THUMB23 14
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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(ARM_8, /* type */
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0, /* rightshift */
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0, /* size */
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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_arm_reloc, /* special_function */
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"ARM_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(ARM_16,
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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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"ARM_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(ARM_32,
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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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"ARM_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(ARM_26,
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2,
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2,
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24,
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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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"ARM_26",
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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(ARM_DISP8,
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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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"ARM_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( ARM_DISP16,
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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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"ARM_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( ARM_DISP32,
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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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"ARM_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( ARM_26D,
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2,
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2,
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24,
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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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"ARM_26D",
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true,
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0x00ffffff,
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0x0,
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false),
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/* 8 is unused */
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{-1},
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HOWTO( ARM_NEG16,
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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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"ARM_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( ARM_NEG32,
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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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"ARM_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( ARM_RVA32,
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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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"ARM_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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HOWTO( ARM_THUMB9,
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1,
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1,
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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_thumb_pcrel_9 ,
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"ARM_THUMB9",
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false,
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0x000000ff,
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0x000000ff,
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PCRELOFFSET),
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HOWTO( ARM_THUMB12,
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1,
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1,
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11,
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true,
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0,
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complain_overflow_signed,
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coff_thumb_pcrel_12 ,
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"ARM_THUMB12",
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false,
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0x000007ff,
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0x000007ff,
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PCRELOFFSET),
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HOWTO( ARM_THUMB23,
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1,
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2,
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22,
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true,
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0,
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complain_overflow_signed,
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coff_thumb_pcrel_23 ,
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"ARM_THUMB23",
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false,
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0x07ff07ff,
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0x07ff07ff,
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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 == ARM_RVA32)
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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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|
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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 == ARM_26
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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 (ARM_26,
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2,
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2,
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24,
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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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"ARM_26",
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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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}
|
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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;
|
||
{
|
||
/* This is dead simple at present. */
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Used by the assembler. */
|
||
|
||
static bfd_reloc_status_type
|
||
aoutarm_fix_pcrel_26 (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;
|
||
{
|
||
bfd_vma relocation;
|
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bfd_size_type addr = reloc_entry->address;
|
||
long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
|
||
bfd_reloc_status_type flag = bfd_reloc_ok;
|
||
|
||
/* If this is an undefined symbol, return error */
|
||
if (symbol->section == &bfd_und_section
|
||
&& (symbol->flags & BSF_WEAK) == 0)
|
||
return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
|
||
|
||
/* If the sections are different, and we are doing a partial relocation,
|
||
just ignore it for now. */
|
||
if (symbol->section->name != input_section->name
|
||
&& output_bfd != (bfd *)NULL)
|
||
return bfd_reloc_continue;
|
||
|
||
relocation = (target & 0x00ffffff) << 2;
|
||
relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend */
|
||
relocation += symbol->value;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
relocation -= input_section->output_section->vma;
|
||
relocation -= input_section->output_offset;
|
||
relocation -= addr;
|
||
|
||
if (relocation & 3)
|
||
return bfd_reloc_overflow;
|
||
|
||
/* Check for overflow */
|
||
if (relocation & 0x02000000)
|
||
{
|
||
if ((relocation & ~0x03ffffff) != ~0x03ffffff)
|
||
flag = bfd_reloc_overflow;
|
||
}
|
||
else if (relocation & ~0x03ffffff)
|
||
flag = bfd_reloc_overflow;
|
||
|
||
target &= ~0x00ffffff;
|
||
target |= (relocation >> 2) & 0x00ffffff;
|
||
bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
|
||
|
||
/* Now the ARM magic... Change the reloc type so that it is marked as done.
|
||
Strictly this is only necessary if we are doing a partial relocation. */
|
||
reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D];
|
||
|
||
return flag;
|
||
}
|
||
|
||
typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype;
|
||
|
||
static bfd_reloc_status_type
|
||
coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data, input_section,
|
||
output_bfd, error_message, btype)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
thumb_pcrel_branchtype btype;
|
||
{
|
||
bfd_vma relocation;
|
||
bfd_size_type addr = reloc_entry->address;
|
||
long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
|
||
bfd_reloc_status_type flag = bfd_reloc_ok;
|
||
bfd_vma dstmsk;
|
||
bfd_vma offmsk;
|
||
bfd_vma signbit;
|
||
|
||
/* NOTE: This routine is currently used by GAS, but not by the link
|
||
phase. */
|
||
|
||
switch (btype)
|
||
{
|
||
case b9:
|
||
dstmsk = 0x000000ff;
|
||
offmsk = 0x000001fe;
|
||
signbit = 0x00000100;
|
||
break;
|
||
|
||
case b12:
|
||
dstmsk = 0x000007ff;
|
||
offmsk = 0x00000ffe;
|
||
signbit = 0x00000800;
|
||
break;
|
||
|
||
case b23:
|
||
dstmsk = 0x07ff07ff;
|
||
offmsk = 0x007fffff;
|
||
signbit = 0x00400000;
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
/* If this is an undefined symbol, return error */
|
||
if (symbol->section == &bfd_und_section
|
||
&& (symbol->flags & BSF_WEAK) == 0)
|
||
return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
|
||
|
||
/* If the sections are different, and we are doing a partial relocation,
|
||
just ignore it for now. */
|
||
if (symbol->section->name != input_section->name
|
||
&& output_bfd != (bfd *)NULL)
|
||
return bfd_reloc_continue;
|
||
|
||
switch (btype)
|
||
{
|
||
case b9:
|
||
case b12:
|
||
relocation = ((target & dstmsk) << 1);
|
||
break;
|
||
|
||
case b23:
|
||
if (bfd_big_endian (abfd))
|
||
relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4);
|
||
else
|
||
relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15);
|
||
break;
|
||
}
|
||
|
||
relocation = (relocation ^ signbit) - signbit; /* Sign extend */
|
||
relocation += symbol->value;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
relocation -= input_section->output_section->vma;
|
||
relocation -= input_section->output_offset;
|
||
relocation -= addr;
|
||
|
||
if (relocation & 1)
|
||
return bfd_reloc_overflow;
|
||
|
||
/* Check for overflow */
|
||
if (relocation & signbit)
|
||
{
|
||
if ((relocation & ~offmsk) != ~offmsk)
|
||
flag = bfd_reloc_overflow;
|
||
}
|
||
else if (relocation & ~offmsk)
|
||
flag = bfd_reloc_overflow;
|
||
|
||
target &= ~dstmsk;
|
||
switch (btype)
|
||
{
|
||
case b9:
|
||
case b12:
|
||
target |= (relocation >> 1);
|
||
break;
|
||
|
||
case b23:
|
||
if (bfd_big_endian (abfd))
|
||
target |= ((relocation & 0xfff) >> 1) | ((relocation << 4) & 0x07ff0000);
|
||
else
|
||
target |= ((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff);
|
||
break;
|
||
}
|
||
|
||
bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
|
||
|
||
/* Now the ARM magic... Change the reloc type so that it is marked as done.
|
||
Strictly this is only necessary if we are doing a partial relocation. */
|
||
reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D];
|
||
|
||
/* TODO: We should possibly have DONE entries for the THUMB PCREL relocations */
|
||
return flag;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
coff_thumb_pcrel_23 (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;
|
||
{
|
||
return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message, b23);
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
coff_thumb_pcrel_12 (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;
|
||
{
|
||
return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message, b12);
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
coff_thumb_pcrel_9 (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;
|
||
{
|
||
return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message, b9);
|
||
}
|
||
|
||
|
||
static CONST struct reloc_howto_struct *
|
||
arm_reloc_type_lookup(abfd,code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
#define ASTD(i,j) case i: return &aoutarm_std_reloc_howto[j]
|
||
if (code == BFD_RELOC_CTOR)
|
||
switch (bfd_get_arch_info (abfd)->bits_per_address)
|
||
{
|
||
case 32:
|
||
code = BFD_RELOC_32;
|
||
break;
|
||
default: return (CONST struct reloc_howto_struct *) 0;
|
||
}
|
||
|
||
switch (code)
|
||
{
|
||
ASTD (BFD_RELOC_8, ARM_8);
|
||
ASTD (BFD_RELOC_16, ARM_16);
|
||
ASTD (BFD_RELOC_32, ARM_32);
|
||
ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
|
||
ASTD (BFD_RELOC_8_PCREL, ARM_DISP8);
|
||
ASTD (BFD_RELOC_16_PCREL, ARM_DISP16);
|
||
ASTD (BFD_RELOC_32_PCREL, ARM_DISP32);
|
||
ASTD (BFD_RELOC_RVA, ARM_RVA32);
|
||
ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9);
|
||
ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
|
||
ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23);
|
||
default: return (CONST struct reloc_howto_struct *) 0;
|
||
}
|
||
}
|
||
|
||
|
||
#define coff_bfd_reloc_type_lookup arm_reloc_type_lookup
|
||
|
||
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
|
||
#define COFF_PAGE_SIZE 0x1000
|
||
/* Turn a howto into a reloc nunmber */
|
||
|
||
#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
|
||
#define BADMAG(x) ARMBADMAG(x)
|
||
#define ARM 1 /* Customize coffcode.h */
|
||
|
||
/* The set of global variables that mark the total size of each kind
|
||
of glue required, plus a BFD to hang the glue sections onto.
|
||
Note: These variable should not be made static, since in a *-pe
|
||
build there are two versions of this file compiled, one for pe
|
||
objects and one for pei objects, and they want to share these
|
||
variables. */
|
||
#if defined COFF_IMAGE_WITH_PE
|
||
extern long int global_thumb_glue_size;
|
||
#else
|
||
long int global_thumb_glue_size = 0;
|
||
#endif
|
||
|
||
#if defined COFF_IMAGE_WITH_PE
|
||
extern long int global_arm_glue_size;
|
||
#else
|
||
long int global_arm_glue_size = 0;
|
||
#endif
|
||
|
||
#if defined COFF_IMAGE_WITH_PE
|
||
extern bfd * bfd_of_glue_owner;
|
||
#else
|
||
bfd * bfd_of_glue_owner = NULL;
|
||
#endif
|
||
|
||
/* some typedefs for holding instructions */
|
||
typedef unsigned long int insn32;
|
||
typedef unsigned short int insn16;
|
||
|
||
|
||
/* The thumb form of a long branch is a bit finicky, because the offset
|
||
encoding is split over two fields, each in it's own instruction. They
|
||
can occur in any order. So given a thumb form of long branch, and an
|
||
offset, insert the offset into the thumb branch and return finished
|
||
instruction.
|
||
|
||
It takes two thumb instructions to encode the target address. Each has
|
||
11 bits to invest. The upper 11 bits are stored in one (identifed by
|
||
H-0.. see below), the lower 11 bits are stored in the other (identified
|
||
by H-1).
|
||
|
||
Combine together and shifted left by 1 (it's a half word address) and
|
||
there you have it.
|
||
|
||
Op: 1111 = F,
|
||
H-0, upper address-0 = 000
|
||
Op: 1111 = F,
|
||
H-1, lower address-0 = 800
|
||
|
||
They can be ordered either way, but the arm tools I've seen always put
|
||
the lower one first. It probably doesn't matter. krk@cygnus.com
|
||
|
||
XXX: Actually the order does matter. The second instruction (H-1)
|
||
moves the computed address into the PC, so it must be the second one
|
||
in the sequence. The problem, however is that whilst little endian code
|
||
stores the instructions in HI then LOW order, big endian code does the
|
||
reverse. nickc@cygnus.com */
|
||
|
||
#define LOW_HI_ORDER 0xF800F000
|
||
#define HI_LOW_ORDER 0xF000F800
|
||
|
||
static insn32
|
||
insert_thumb_branch (br_insn, rel_off)
|
||
insn32 br_insn;
|
||
int rel_off;
|
||
{
|
||
unsigned int low_bits;
|
||
unsigned int high_bits;
|
||
|
||
|
||
BFD_ASSERT((rel_off & 1) != 1);
|
||
|
||
rel_off >>= 1; /* half word aligned address */
|
||
low_bits = rel_off & 0x000007FF; /* the bottom 11 bits */
|
||
high_bits = ( rel_off >> 11 ) & 0x000007FF; /* the top 11 bits */
|
||
|
||
if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
|
||
br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
|
||
else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
|
||
br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
|
||
else
|
||
abort(); /* error - not a valid branch instruction form */
|
||
|
||
/* FIXME: abort is probably not the right call. krk@cygnus.com */
|
||
|
||
return br_insn;
|
||
}
|
||
|
||
|
||
static struct coff_link_hash_entry *
|
||
find_thumb_glue (info, name, input_bfd)
|
||
struct bfd_link_info * info;
|
||
char * name;
|
||
bfd * input_bfd;
|
||
{
|
||
char * tmp_name = 0;
|
||
struct coff_link_hash_entry * myh = 0;
|
||
|
||
tmp_name = ((char *)
|
||
bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME)));
|
||
|
||
BFD_ASSERT (tmp_name);
|
||
|
||
sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
|
||
|
||
myh = coff_link_hash_lookup (coff_hash_table (info),
|
||
tmp_name,
|
||
false, false, true);
|
||
if (myh == NULL)
|
||
{
|
||
_bfd_error_handler ("%s: unable to find THUMB glue '%s' for `%s'",
|
||
bfd_get_filename (input_bfd), tmp_name, name);
|
||
}
|
||
|
||
free (tmp_name);
|
||
|
||
return myh;
|
||
}
|
||
|
||
static struct coff_link_hash_entry *
|
||
find_arm_glue (info, name, input_bfd)
|
||
struct bfd_link_info * info;
|
||
char * name;
|
||
bfd * input_bfd;
|
||
{
|
||
char *tmp_name = 0;
|
||
struct coff_link_hash_entry *myh = 0;
|
||
|
||
tmp_name = ((char *)
|
||
bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
|
||
|
||
BFD_ASSERT (tmp_name);
|
||
|
||
sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
|
||
|
||
myh = coff_link_hash_lookup (coff_hash_table (info),
|
||
tmp_name,
|
||
false, false, true);
|
||
|
||
if (myh == NULL)
|
||
{
|
||
_bfd_error_handler ("%s: unable to find ARM glue '%s' for `%s'",
|
||
bfd_get_filename (input_bfd), tmp_name, name);
|
||
}
|
||
|
||
free (tmp_name);
|
||
|
||
return myh;
|
||
}
|
||
|
||
/*
|
||
ARM->Thumb glue:
|
||
|
||
.arm
|
||
__func_from_arm:
|
||
ldr r12, __func_addr
|
||
bx r12
|
||
__func_addr:
|
||
.word func @ behave as if you saw a ARM_32 reloc
|
||
|
||
ldr ip,8 <__func_addr> e59fc000
|
||
bx ip e12fff1c
|
||
.word func 00000001
|
||
|
||
*/
|
||
|
||
#define ARM2THUMB_GLUE_SIZE 12
|
||
static const insn32
|
||
a2t1_ldr_insn = 0xe59fc000,
|
||
a2t2_bx_r12_insn = 0xe12fff1c,
|
||
a2t3_func_addr_insn = 0x00000001;
|
||
|
||
/*
|
||
Thumb->ARM:
|
||
|
||
.thumb
|
||
.align 2
|
||
__func_from_thumb:
|
||
bx pc
|
||
nop
|
||
.arm
|
||
__func_change_to_arm:
|
||
b func
|
||
|
||
|
||
bx pc 4778
|
||
nop 0000
|
||
b func eafffffe
|
||
|
||
*/
|
||
|
||
#define THUMB2ARM_GLUE_SIZE 8
|
||
static const insn16
|
||
t2a1_bx_pc_insn = 0x4778,
|
||
t2a2_noop_insn = 0x46c0;
|
||
static const insn32
|
||
t2a3_b_insn = 0xea000000;
|
||
|
||
/* TODO:
|
||
We should really create new local (static) symbols in destination
|
||
object for each stub we create. We should also create local
|
||
(static) symbols within the stubs when switching between ARM and
|
||
Thumb code. This will ensure that the debugger and disassembler
|
||
can present a better view of stubs.
|
||
|
||
We can treat stubs like literal sections, and for the THUMB9 ones
|
||
(short addressing range) we should be able to insert the stubs
|
||
between sections. i.e. the simplest approach (since relocations
|
||
are done on a section basis) is to dump the stubs at the end of
|
||
processing a section. That way we can always try and minimise the
|
||
offset to and from a stub. However, this does not map well onto
|
||
the way that the linker/BFD does its work: mapping all input
|
||
sections to output sections via the linker script before doing
|
||
all the processing.
|
||
|
||
Unfortunately it may be easier to just to disallow short range
|
||
Thumb->ARM stubs (i.e. no conditional inter-working branches,
|
||
only branch-and-link (BL) calls. This will simplify the processing
|
||
since we can then put all of the stubs into their own section.
|
||
|
||
TODO:
|
||
On a different subject, rather than complaining when a
|
||
branch cannot fit in the number of bits available for the
|
||
instruction we should generate a trampoline stub (needed to
|
||
address the complete 32bit address space). */
|
||
|
||
/* The standard COFF backend linker does not cope with the special
|
||
Thumb BRANCH23 relocation. The alternative would be to split the
|
||
BRANCH23 into seperate HI23 and LO23 relocations. However, it is a
|
||
bit simpler simply providing our own relocation driver. */
|
||
|
||
/* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
|
||
This code is a very slightly modified copy of
|
||
_bfd_coff_generic_relocate_section. It would be a much more
|
||
maintainable solution to have a MACRO that could be expanded within
|
||
_bfd_coff_generic_relocate_section that would only be provided for
|
||
ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
|
||
is different from the original. */
|
||
|
||
static boolean
|
||
coff_arm_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, syms, sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
struct internal_reloc *relocs;
|
||
struct internal_syment *syms;
|
||
asection **sections;
|
||
{
|
||
struct internal_reloc * rel;
|
||
struct internal_reloc * relend;
|
||
|
||
rel = relocs;
|
||
relend = rel + input_section->reloc_count;
|
||
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int done = 0;
|
||
long symndx;
|
||
struct coff_link_hash_entry *h;
|
||
struct internal_syment *sym;
|
||
bfd_vma addend;
|
||
bfd_vma val;
|
||
reloc_howto_type *howto;
|
||
bfd_reloc_status_type rstat;
|
||
bfd_vma h_val;
|
||
|
||
symndx = rel->r_symndx;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
h = NULL;
|
||
sym = NULL;
|
||
}
|
||
else
|
||
{
|
||
h = obj_coff_sym_hashes (input_bfd)[symndx];
|
||
sym = syms + symndx;
|
||
}
|
||
|
||
/* COFF treats common symbols in one of two ways. Either the
|
||
size of the symbol is included in the section contents, or it
|
||
is not. We assume that the size is not included, and force
|
||
the rtype_to_howto function to adjust the addend as needed. */
|
||
|
||
if (sym != NULL && sym->n_scnum != 0)
|
||
addend = - sym->n_value;
|
||
else
|
||
addend = 0;
|
||
|
||
|
||
howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
|
||
sym, &addend);
|
||
if (howto == NULL)
|
||
return false;
|
||
|
||
/* If we are doing a relocateable link, then we can just ignore
|
||
a PC relative reloc that is pcrel_offset. It will already
|
||
have the correct value. If this is not a relocateable link,
|
||
then we should ignore the symbol value. */
|
||
if (howto->pc_relative && howto->pcrel_offset)
|
||
{
|
||
if (info->relocateable)
|
||
continue;
|
||
if (sym != NULL && sym->n_scnum != 0)
|
||
addend += sym->n_value;
|
||
}
|
||
|
||
/* If we are doing a relocateable link, then we can just ignore
|
||
a PC relative reloc that is pcrel_offset. It will already
|
||
have the correct value. */
|
||
if (info->relocateable
|
||
&& howto->pc_relative
|
||
&& howto->pcrel_offset)
|
||
continue;
|
||
|
||
val = 0;
|
||
|
||
if (h == NULL)
|
||
{
|
||
asection *sec;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
sec = bfd_abs_section_ptr;
|
||
val = 0;
|
||
}
|
||
else
|
||
{
|
||
sec = sections[symndx];
|
||
val = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->n_value
|
||
- sec->vma);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
#if 1 /* THUMBEXTENSION */
|
||
/* We don't output the stubs if we are generating a
|
||
relocatable output file, since we may as well leave the
|
||
stub generation to the final linker pass. If we fail to
|
||
verify that the name is defined, we'll try to build stubs
|
||
for an undefined name... */
|
||
if (! info->relocateable
|
||
&& ( h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak))
|
||
{
|
||
asection * sec;
|
||
asection * h_sec = h->root.u.def.section;
|
||
const char * name = h->root.root.string;
|
||
|
||
/* h locates the symbol referenced in the reloc. */
|
||
h_val = (h->root.u.def.value
|
||
+ h_sec->output_section->vma
|
||
+ h_sec->output_offset);
|
||
|
||
if (howto->type == ARM_26)
|
||
{
|
||
if ( h->class == C_THUMBSTATFUNC
|
||
|| h->class == C_THUMBEXTFUNC)
|
||
{
|
||
/* Arm code calling a Thumb function */
|
||
signed long int final_disp;
|
||
unsigned long int tmp;
|
||
long int my_offset;
|
||
long int offset;
|
||
asection * s = 0;
|
||
unsigned long int return_address;
|
||
long int ret_offset;
|
||
long int disp;
|
||
struct coff_link_hash_entry * myh;
|
||
|
||
myh = find_arm_glue (info, name, input_bfd);
|
||
if (myh == NULL)
|
||
return false;
|
||
|
||
my_offset = myh->root.u.def.value;
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner,
|
||
ARM2THUMB_GLUE_SECTION_NAME);
|
||
BFD_ASSERT (s != NULL);
|
||
BFD_ASSERT (s->contents != NULL);
|
||
|
||
if ((my_offset & 0x01) == 0x01)
|
||
{
|
||
if (h_sec->owner != NULL
|
||
&& INTERWORK_SET (h_sec->owner)
|
||
&& ! INTERWORK_FLAG (h_sec->owner))
|
||
{
|
||
_bfd_error_handler
|
||
("%s(%s): warning: interworking not enabled.",
|
||
bfd_get_filename (h_sec->owner), name);
|
||
_bfd_error_handler
|
||
(" first occurrence: %s: arm call to thumb",
|
||
bfd_get_filename (input_bfd));
|
||
}
|
||
|
||
--my_offset;
|
||
myh->root.u.def.value = my_offset;
|
||
|
||
bfd_put_32 (output_bfd, a2t1_ldr_insn, s->contents + my_offset);
|
||
|
||
bfd_put_32 (output_bfd, a2t2_bx_r12_insn, s->contents + my_offset + 4);
|
||
|
||
/* It's a thumb address. Add the low order bit. */
|
||
bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn, s->contents + my_offset + 8);
|
||
}
|
||
|
||
BFD_ASSERT (my_offset <= global_arm_glue_size);
|
||
|
||
tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr - input_section->vma);
|
||
|
||
tmp = tmp & 0xFF000000;
|
||
|
||
/* Somehow these are both 4 too far, so subtract 8. */
|
||
ret_offset =
|
||
s->output_offset
|
||
+ my_offset
|
||
+ s->output_section->vma
|
||
- (input_section->output_offset
|
||
+ input_section->output_section->vma
|
||
+ rel->r_vaddr)
|
||
- 8;
|
||
|
||
tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
|
||
|
||
bfd_put_32 (output_bfd, tmp, contents + rel->r_vaddr - input_section->vma);
|
||
|
||
done = 1;
|
||
}
|
||
}
|
||
|
||
/* Note: We used to check for ARM_THUMB9 and ARM_THUMB12 */
|
||
else if (howto->type == ARM_THUMB23)
|
||
{
|
||
if ( h->class == C_EXT
|
||
|| h->class == C_STAT
|
||
|| h->class == C_LABEL)
|
||
{
|
||
/* Thumb code calling an ARM function */
|
||
unsigned long int return_address;
|
||
signed long int final_disp;
|
||
asection * s = 0;
|
||
long int my_offset;
|
||
unsigned long int tmp;
|
||
long int ret_offset;
|
||
struct coff_link_hash_entry * myh;
|
||
|
||
myh = find_thumb_glue (info, name, input_bfd);
|
||
if (myh == NULL)
|
||
return false;
|
||
|
||
my_offset = myh->root.u.def.value;
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner,
|
||
THUMB2ARM_GLUE_SECTION_NAME);
|
||
|
||
BFD_ASSERT (s != NULL);
|
||
BFD_ASSERT (s->contents != NULL);
|
||
|
||
if ((my_offset & 0x01) == 0x01)
|
||
{
|
||
if (h_sec->owner != NULL
|
||
&& INTERWORK_SET (h_sec->owner)
|
||
&& ! INTERWORK_FLAG (h_sec->owner))
|
||
{
|
||
_bfd_error_handler
|
||
("%s(%s): warning: interworking not enabled.",
|
||
bfd_get_filename (h_sec->owner), name);
|
||
_bfd_error_handler
|
||
(" first occurrence: %s: thumb call to arm",
|
||
bfd_get_filename (input_bfd));
|
||
}
|
||
|
||
-- my_offset;
|
||
myh->root.u.def.value = my_offset;
|
||
|
||
bfd_put_16 (output_bfd, t2a1_bx_pc_insn,
|
||
s->contents + my_offset);
|
||
|
||
bfd_put_16 (output_bfd, t2a2_noop_insn,
|
||
s->contents + my_offset + 2);
|
||
|
||
ret_offset =
|
||
((signed)h_val) - /* Address of destination of the stub */
|
||
((signed)(s->output_offset /* Offset from the start of the current section to the start of the stubs. */
|
||
+ my_offset /* Offset of the start of this stub from the start of the stubs. */
|
||
+ s->output_section->vma) /* Address of the start of the current section. */
|
||
+ 4 /* The branch instruction is 4 bytes into the stub. */
|
||
+ 8); /* ARM branches work from the pc of the instruction + 8. */
|
||
|
||
bfd_put_32 (output_bfd,
|
||
t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
|
||
s->contents + my_offset + 4);
|
||
}
|
||
|
||
BFD_ASSERT (my_offset <= global_thumb_glue_size);
|
||
|
||
/* Now go back and fix up the original bl insn to point here. */
|
||
ret_offset =
|
||
s->output_offset
|
||
+ my_offset
|
||
- (input_section->output_offset
|
||
+ rel->r_vaddr)
|
||
-4;
|
||
|
||
tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr - input_section->vma);
|
||
|
||
bfd_put_32 (output_bfd,
|
||
insert_thumb_branch (tmp, ret_offset),
|
||
contents + rel->r_vaddr - input_section->vma);
|
||
|
||
done = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If the relocation type and destination symbol does not
|
||
fall into one of the above categories, then we can just
|
||
perform a direct link. */
|
||
|
||
if (done)
|
||
rstat = bfd_reloc_ok;
|
||
else
|
||
#endif /* THUMBEXTENSION */
|
||
if ( h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.def.section;
|
||
val = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
|
||
else if (! info->relocateable)
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
rel->r_vaddr - input_section->vma)))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (info->base_file)
|
||
{
|
||
/* Emit a reloc if the backend thinks it needs it. */
|
||
if (sym && pe_data(output_bfd)->in_reloc_p(output_bfd, howto))
|
||
{
|
||
/* relocation to a symbol in a section which
|
||
isn't absolute - we output the address here
|
||
to a file */
|
||
bfd_vma addr = rel->r_vaddr
|
||
- input_section->vma
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma;
|
||
if (coff_data(output_bfd)->pe)
|
||
addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
|
||
/* FIXME: Shouldn't 4 be sizeof (addr)? */
|
||
fwrite (&addr, 1,4, (FILE *) info->base_file);
|
||
}
|
||
}
|
||
|
||
#if 1 /* THUMBEXTENSION */
|
||
if (done)
|
||
;
|
||
/* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
|
||
else if (! info->relocateable
|
||
&& howto->type == ARM_THUMB23)
|
||
{
|
||
/* This is pretty much a copy of what the default
|
||
_bfd_final_link_relocate and _bfd_relocate_contents
|
||
routines do to perform a relocation, with special
|
||
processing for the split addressing of the Thumb BL
|
||
instruction. Again, it would probably be simpler adding a
|
||
ThumbBRANCH23 specific macro expansion into the default
|
||
code. */
|
||
|
||
bfd_vma address = rel->r_vaddr - input_section->vma;
|
||
|
||
if (address > input_section->_raw_size)
|
||
rstat = bfd_reloc_outofrange;
|
||
else
|
||
{
|
||
bfd_vma relocation = val + addend;
|
||
int size = bfd_get_reloc_size (howto);
|
||
boolean overflow = false;
|
||
bfd_byte * location = contents + address;
|
||
bfd_vma x = bfd_get_32 (input_bfd, location);
|
||
bfd_vma src_mask = 0x007FFFFE;
|
||
bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
|
||
bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
|
||
bfd_vma check;
|
||
bfd_signed_vma signed_check;
|
||
bfd_vma add;
|
||
bfd_signed_vma signed_add;
|
||
|
||
BFD_ASSERT (size == 4);
|
||
|
||
/* howto->pc_relative should be TRUE for type 14 BRANCH23 */
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
/* howto->pcrel_offset should be TRUE for type 14 BRANCH23 */
|
||
relocation -= address;
|
||
|
||
/* No need to negate the relocation with BRANCH23. */
|
||
/* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
|
||
/* howto->rightshift == 1 */
|
||
/* Drop unwanted bits from the value we are relocating to. */
|
||
|
||
check = relocation >> howto->rightshift;
|
||
|
||
/* If this is a signed value, the rightshift just dropped
|
||
leading 1 bits (assuming twos complement). */
|
||
if ((bfd_signed_vma) relocation >= 0)
|
||
signed_check = check;
|
||
else
|
||
signed_check = (check
|
||
| ((bfd_vma) - 1
|
||
& ~((bfd_vma) - 1 >> howto->rightshift)));
|
||
|
||
/* Get the value from the object file. */
|
||
if (bfd_big_endian (input_bfd))
|
||
{
|
||
add = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1);
|
||
}
|
||
else
|
||
{
|
||
add = ((((x) & 0x7ff) << 12) | (((x) & 0x07ff0000) >> 15));
|
||
}
|
||
|
||
/* Get the value from the object file with an appropriate sign.
|
||
The expression involving howto->src_mask isolates the upper
|
||
bit of src_mask. If that bit is set in the value we are
|
||
adding, it is negative, and we subtract out that number times
|
||
two. If src_mask includes the highest possible bit, then we
|
||
can not get the upper bit, but that does not matter since
|
||
signed_add needs no adjustment to become negative in that
|
||
case. */
|
||
|
||
signed_add = add;
|
||
|
||
if ((add & (((~ src_mask) >> 1) & src_mask)) != 0)
|
||
signed_add -= (((~ src_mask) >> 1) & src_mask) << 1;
|
||
|
||
/* Add the value from the object file, shifted so that it is a
|
||
straight number. */
|
||
/* howto->bitpos == 0 */
|
||
|
||
signed_check += signed_add;
|
||
relocation += signed_add;
|
||
|
||
BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed);
|
||
|
||
/* Assumes two's complement. */
|
||
if ( signed_check > reloc_signed_max
|
||
|| signed_check < reloc_signed_min)
|
||
overflow = true;
|
||
|
||
/* Put RELOCATION into the correct bits: */
|
||
|
||
if (bfd_big_endian (input_bfd))
|
||
{
|
||
relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000));
|
||
}
|
||
else
|
||
{
|
||
relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff));
|
||
}
|
||
|
||
/* Add RELOCATION to the correct bits of X: */
|
||
x = ((x & ~howto->dst_mask) | relocation);
|
||
|
||
/* Put the relocated value back in the object file: */
|
||
bfd_put_32 (input_bfd, x, location);
|
||
|
||
rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok;
|
||
}
|
||
}
|
||
else
|
||
#endif /* THUMBEXTENSION */
|
||
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents,
|
||
rel->r_vaddr - input_section->vma,
|
||
val, addend);
|
||
#if 1 /* THUMBEXTENSION */
|
||
/* FIXME:
|
||
Is this the best way to fix up thumb addresses? krk@cygnus.com
|
||
Probably not, but it works, and if it works it don't need fixing! nickc@cygnus.com */
|
||
/* Only perform this fix during the final link, not a relocatable link. nickc@cygnus.com */
|
||
if (! info->relocateable
|
||
&& rel->r_type == ARM_32)
|
||
{
|
||
/* Determine if we need to set the bottom bit of a relocated address
|
||
because the address is the address of a Thumb code symbol. */
|
||
|
||
int patchit = false;
|
||
|
||
if (h != NULL
|
||
&& ( h->class == C_THUMBSTATFUNC
|
||
|| h->class == C_THUMBEXTFUNC))
|
||
{
|
||
patchit = true;
|
||
}
|
||
else if (sym != NULL
|
||
&& sym->n_scnum > N_UNDEF)
|
||
{
|
||
/* No hash entry - use the symbol instead. */
|
||
|
||
if ( sym->n_sclass == C_THUMBSTATFUNC
|
||
|| sym->n_sclass == C_THUMBEXTFUNC)
|
||
patchit = true;
|
||
}
|
||
|
||
if (patchit)
|
||
{
|
||
bfd_byte * location = contents + rel->r_vaddr - input_section->vma;
|
||
bfd_vma x = bfd_get_32 (input_bfd, location);
|
||
|
||
bfd_put_32 (input_bfd, x | 1, location);
|
||
}
|
||
}
|
||
#endif /* THUMBEXTENSION */
|
||
|
||
switch (rstat)
|
||
{
|
||
default:
|
||
abort ();
|
||
case bfd_reloc_ok:
|
||
break;
|
||
case bfd_reloc_outofrange:
|
||
(*_bfd_error_handler)
|
||
("%s: bad reloc address 0x%lx in section `%s'",
|
||
bfd_get_filename (input_bfd),
|
||
(unsigned long) rel->r_vaddr,
|
||
bfd_get_section_name (input_bfd, input_section));
|
||
return false;
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
|
||
if (symndx == -1)
|
||
name = "*ABS*";
|
||
else if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
|
||
if (name == NULL)
|
||
return false;
|
||
}
|
||
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0, input_bfd,
|
||
input_section, rel->r_vaddr - input_section->vma)))
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
|
||
boolean
|
||
arm_allocate_interworking_sections (info)
|
||
struct bfd_link_info *info;
|
||
{
|
||
asection * s;
|
||
bfd_byte * foo;
|
||
#if 0
|
||
static char test_char = '1';
|
||
#endif
|
||
|
||
if (global_arm_glue_size != 0)
|
||
{
|
||
BFD_ASSERT (bfd_of_glue_owner != NULL);
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
|
||
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
foo = (bfd_byte *) bfd_alloc (bfd_of_glue_owner, global_arm_glue_size);
|
||
#if 0
|
||
memset (foo, test_char, global_arm_glue_size);
|
||
#endif
|
||
|
||
s->_raw_size = s->_cooked_size = global_arm_glue_size;
|
||
s->contents = foo;
|
||
}
|
||
|
||
if (global_thumb_glue_size != 0)
|
||
{
|
||
BFD_ASSERT (bfd_of_glue_owner != NULL);
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
||
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
foo = (bfd_byte *) bfd_alloc (bfd_of_glue_owner, global_thumb_glue_size);
|
||
#if 0
|
||
memset (foo, test_char, global_thumb_glue_size);
|
||
#endif
|
||
|
||
s->_raw_size = s->_cooked_size = global_thumb_glue_size;
|
||
s->contents = foo;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static void
|
||
record_arm_to_thumb_glue (info, h)
|
||
struct bfd_link_info * info;
|
||
struct coff_link_hash_entry * h;
|
||
{
|
||
const char * name = h->root.root.string;
|
||
register asection * s;
|
||
char * tmp_name;
|
||
struct coff_link_hash_entry * myh;
|
||
|
||
|
||
BFD_ASSERT (bfd_of_glue_owner != NULL);
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner,
|
||
ARM2THUMB_GLUE_SECTION_NAME);
|
||
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
tmp_name = ((char *)
|
||
bfd_malloc (strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME)));
|
||
|
||
BFD_ASSERT (tmp_name);
|
||
|
||
sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
|
||
|
||
myh = coff_link_hash_lookup (coff_hash_table (info),
|
||
tmp_name,
|
||
false, false, true);
|
||
|
||
if (myh != NULL)
|
||
{
|
||
free (tmp_name);
|
||
return; /* we've already seen this guy */
|
||
}
|
||
|
||
|
||
/* The only trick here is using global_arm_glue_size as the value. Even
|
||
though the section isn't allocated yet, this is where we will be putting
|
||
it. */
|
||
|
||
bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
|
||
BSF_EXPORT | BSF_GLOBAL,
|
||
s, global_arm_glue_size + 1,
|
||
NULL, true, false,
|
||
(struct bfd_link_hash_entry **) & myh);
|
||
|
||
global_arm_glue_size += ARM2THUMB_GLUE_SIZE;
|
||
|
||
free (tmp_name);
|
||
|
||
return;
|
||
}
|
||
|
||
static void
|
||
record_thumb_to_arm_glue (info, h)
|
||
struct bfd_link_info * info;
|
||
struct coff_link_hash_entry * h;
|
||
{
|
||
const char * name = h->root.root.string;
|
||
register asection * s;
|
||
char * tmp_name;
|
||
struct coff_link_hash_entry * myh;
|
||
|
||
BFD_ASSERT (bfd_of_glue_owner != NULL);
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
||
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
tmp_name = (char *) bfd_malloc (strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME));
|
||
|
||
BFD_ASSERT (tmp_name);
|
||
|
||
sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
|
||
|
||
myh = coff_link_hash_lookup (coff_hash_table (info),
|
||
tmp_name,
|
||
false, false, true);
|
||
|
||
if (myh != NULL)
|
||
{
|
||
free (tmp_name);
|
||
return; /* we've already seen this guy */
|
||
}
|
||
|
||
bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
|
||
BSF_LOCAL, s, global_thumb_glue_size + 1,
|
||
NULL, true, false,
|
||
(struct bfd_link_hash_entry **) & myh);
|
||
|
||
/* If we mark it 'thumb', the disassembler will do a better job. */
|
||
myh->class = C_THUMBEXTFUNC;
|
||
|
||
free (tmp_name);
|
||
|
||
#define CHANGE_TO_ARM "__%s_change_to_arm"
|
||
|
||
tmp_name = ((char *)
|
||
bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM)));
|
||
|
||
BFD_ASSERT (tmp_name);
|
||
|
||
sprintf (tmp_name, CHANGE_TO_ARM, name);
|
||
|
||
myh = NULL;
|
||
|
||
/* Now allocate another symbol to switch back to arm mode. */
|
||
bfd_coff_link_add_one_symbol (info, bfd_of_glue_owner, tmp_name,
|
||
BSF_LOCAL, s, global_thumb_glue_size + 4,
|
||
NULL, true, false,
|
||
(struct bfd_link_hash_entry **) & myh);
|
||
|
||
free (tmp_name);
|
||
|
||
global_thumb_glue_size += THUMB2ARM_GLUE_SIZE;
|
||
|
||
return;
|
||
}
|
||
|
||
boolean
|
||
arm_process_before_allocation (abfd, info)
|
||
bfd * abfd;
|
||
struct bfd_link_info * info;
|
||
{
|
||
asection * sec;
|
||
|
||
/* If we are only performing a partial link do not bother
|
||
to construct any glue. */
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
/* Here we have a bfd that is to be included on the link. We have a hook
|
||
to do reloc rummaging, before section sizes are nailed down. */
|
||
|
||
_bfd_coff_get_external_symbols (abfd);
|
||
|
||
BFD_ASSERT (bfd_of_glue_owner != NULL);
|
||
|
||
/* Rummage around all the relocs and map the glue vectors. */
|
||
sec = abfd->sections;
|
||
|
||
if (sec == NULL)
|
||
return true;
|
||
|
||
for (; sec != NULL; sec = sec->next)
|
||
{
|
||
struct internal_reloc * i;
|
||
struct internal_reloc * rel;
|
||
|
||
if (sec->reloc_count == 0)
|
||
continue;
|
||
|
||
/* Load the relocs. */
|
||
/* FIXME: there may be a storage leak here. */
|
||
|
||
i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0);
|
||
|
||
BFD_ASSERT (i != 0);
|
||
|
||
for (rel = i; rel < i + sec->reloc_count; ++rel)
|
||
{
|
||
unsigned short r_type = rel->r_type;
|
||
long symndx;
|
||
struct coff_link_hash_entry * h;
|
||
|
||
symndx = rel->r_symndx;
|
||
|
||
/* If the relocation is not against a symbol it cannot concern us. */
|
||
if (symndx == -1)
|
||
continue;
|
||
|
||
h = obj_coff_sym_hashes (abfd)[symndx];
|
||
|
||
/* If the relocation is against a static symbol it must be within
|
||
the current section and so cannot be a cross ARM/Thumb relocation. */
|
||
if (h == NULL)
|
||
continue;
|
||
|
||
switch (r_type)
|
||
{
|
||
case ARM_26:
|
||
/* This one is a call from arm code. We need to look up
|
||
the target of the call. If it is a thumb target, we
|
||
insert glue. */
|
||
|
||
if (h->class == C_THUMBEXTFUNC)
|
||
record_arm_to_thumb_glue (info, h);
|
||
break;
|
||
|
||
case ARM_THUMB23:
|
||
/* This one is a call from thumb code. We used to look
|
||
for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
|
||
up the target of the call. If it is an arm target, we
|
||
insert glue. If the symbol does not exist it will be
|
||
given a class of C_EXT and so we will generate a stub
|
||
for it. This is not really a problem, since the link
|
||
is doomed anyway. */
|
||
|
||
switch (h->class)
|
||
{
|
||
case C_EXT:
|
||
case C_STAT:
|
||
case C_LABEL:
|
||
record_thumb_to_arm_glue (info, h);
|
||
break;
|
||
default:
|
||
;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
#endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
|
||
|
||
#define coff_relocate_section coff_arm_relocate_section
|
||
|
||
/* When doing a relocateable link, we want to convert ARM26 relocs
|
||
into ARM26D relocs. */
|
||
|
||
static boolean
|
||
coff_arm_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
|
||
bfd *obfd;
|
||
struct bfd_link_info *info;
|
||
bfd *ibfd;
|
||
asection *sec;
|
||
struct internal_reloc *irel;
|
||
boolean *adjustedp;
|
||
{
|
||
if (irel->r_type == 3)
|
||
{
|
||
struct coff_link_hash_entry *h;
|
||
|
||
h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
|
||
if (h != NULL
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& h->root.u.def.section->output_section == sec->output_section)
|
||
irel->r_type = 7;
|
||
}
|
||
*adjustedp = false;
|
||
return true;
|
||
}
|
||
|
||
#if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
|
||
/* Called when merging the private data areas of two BFDs.
|
||
This is important as it allows us to detect if we are
|
||
attempting to merge binaries compiled for different ARM
|
||
targets, eg different CPUs or differents APCS's. */
|
||
|
||
boolean
|
||
coff_arm_bfd_merge_private_bfd_data (ibfd, obfd)
|
||
bfd * ibfd;
|
||
bfd * obfd;
|
||
{
|
||
BFD_ASSERT (ibfd != NULL && obfd != NULL);
|
||
|
||
if (ibfd == obfd)
|
||
return true;
|
||
|
||
/* If the two formats are different we cannot merge anything.
|
||
This is not an error, since it is permissable to change the
|
||
input and output formats. */
|
||
if ( ibfd->xvec->flavour != bfd_target_coff_flavour
|
||
|| obfd->xvec->flavour != bfd_target_coff_flavour)
|
||
return true;
|
||
|
||
/* Verify that the APCS is the same for the two BFDs */
|
||
if (APCS_SET (ibfd))
|
||
{
|
||
if (APCS_SET (obfd))
|
||
{
|
||
/* If the src and dest have different APCS flag bits set, fail. */
|
||
if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd))
|
||
{
|
||
_bfd_error_handler
|
||
("%s: ERROR: compiled for APCS-%d whereas target %s uses APCS-%d",
|
||
bfd_get_filename (ibfd), APCS_26_FLAG (ibfd) ? 26 : 32,
|
||
bfd_get_filename (obfd), APCS_26_FLAG (obfd) ? 26 : 32
|
||
);
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
|
||
if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd))
|
||
{
|
||
_bfd_error_handler
|
||
("%s: ERROR: passes floats in %s registers whereas target %s uses %s registers",
|
||
bfd_get_filename (ibfd), APCS_FLOAT_FLAG (ibfd) ? "float" : "integer",
|
||
bfd_get_filename (obfd), APCS_FLOAT_FLAG (obfd) ? "float" : "integer"
|
||
);
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
|
||
if (PIC_FLAG (obfd) != PIC_FLAG (ibfd))
|
||
{
|
||
_bfd_error_handler
|
||
("%s: ERROR: compiled as %s code, whereas target %s is %s",
|
||
bfd_get_filename (ibfd), PIC_FLAG (ibfd) ? "position independent" : "absoluste position",
|
||
bfd_get_filename (obfd), PIC_FLAG (obfd) ? "position independent" : "absoluste position"
|
||
);
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd));
|
||
|
||
/* Set up the arch and fields as well as these are probably wrong. */
|
||
bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
|
||
}
|
||
}
|
||
|
||
/* Check the interworking support. */
|
||
if (INTERWORK_SET (ibfd))
|
||
{
|
||
if (INTERWORK_SET (obfd))
|
||
{
|
||
/* If the src and dest differ in their interworking issue a warning. */
|
||
if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd))
|
||
{
|
||
_bfd_error_handler
|
||
("Warning: input file %s %s interworking, whereas %s does%s",
|
||
bfd_get_filename (ibfd),
|
||
INTERWORK_FLAG (ibfd) ? "supports" : "does not support",
|
||
bfd_get_filename (obfd),
|
||
INTERWORK_FLAG (obfd) ? "." : " not."
|
||
);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd));
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Display the flags field. */
|
||
|
||
boolean
|
||
coff_arm_bfd_print_private_bfd_data (abfd, ptr)
|
||
bfd * abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE * file = (FILE *) ptr;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL)
|
||
|
||
fprintf (file, "private flags = %x", coff_data (abfd)->flags);
|
||
|
||
if (APCS_SET (abfd))
|
||
fprintf (file, ": [APCS-%d] [floats passed in %s registers] [%s]",
|
||
APCS_26_FLAG (abfd) ? 26 : 32,
|
||
APCS_FLOAT_FLAG (abfd) ? "float" : "integer",
|
||
PIC_FLAG (abfd) ? "position independent" : "absolute position"
|
||
);
|
||
|
||
if (INTERWORK_SET (abfd))
|
||
fprintf (file, " [interworking %ssupported]",
|
||
INTERWORK_FLAG (abfd) ? "" : "not " );
|
||
else
|
||
fprintf (file, " [interworking flag not initialised]");
|
||
|
||
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_26_FLAG (abfd) != flag)
|
||
|| (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT))
|
||
|| (PIC_FLAG (abfd) != (flags & F_PIC))
|
||
))
|
||
return false;
|
||
|
||
flag |= (flags & (F_APCS_FLOAT | F_PIC));
|
||
|
||
SET_APCS_FLAGS (abfd, flag);
|
||
|
||
flag = (flags & F_INTERWORK);
|
||
|
||
/* If either the flags or the BFD do support interworking then do not set the interworking flag. */
|
||
if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag))
|
||
flag = 0;
|
||
|
||
SET_INTERWORK_FLAG (abfd, flag);
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Copy the important parts of the target specific data
|
||
from one instance of a BFD to another. */
|
||
|
||
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_26_FLAG (dest) != APCS_26_FLAG (src))
|
||
return false;
|
||
|
||
if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src))
|
||
return false;
|
||
|
||
if (PIC_FLAG (dest) != PIC_FLAG (src))
|
||
return false;
|
||
}
|
||
else
|
||
SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src) | PIC_FLAG (src));
|
||
}
|
||
|
||
if (INTERWORK_SET (src))
|
||
{
|
||
if (INTERWORK_SET (dest))
|
||
{
|
||
/* If the src and dest have different interworking flags then turn off the interworking bit. */
|
||
if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src))
|
||
SET_INTERWORK_FLAG (dest, 0);
|
||
}
|
||
else
|
||
{
|
||
SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src));
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
|
||
*must* match the definitions on gcc/config/arm/semi.h. */
|
||
#define LOCAL_LABEL_PREFIX "."
|
||
#define USER_LABEL_PREFIX "_"
|
||
|
||
boolean
|
||
coff_arm_is_local_label_name (abfd, name)
|
||
bfd * abfd;
|
||
const char * name;
|
||
{
|
||
#ifdef LOCAL_LABEL_PREFIX
|
||
/* If there is a prefix for local labels then look for this.
|
||
If the prefix exists, but it is empty, then ignore the test. */
|
||
|
||
if (LOCAL_LABEL_PREFIX[0] != 0)
|
||
{
|
||
if (strncmp (name, LOCAL_LABEL_PREFIX, strlen (LOCAL_LABEL_PREFIX)) == 0)
|
||
return true;
|
||
}
|
||
#endif
|
||
#ifdef USER_LABEL_PREFIX
|
||
if (USER_LABEL_PREFIX[0] != 0)
|
||
{
|
||
if (strncmp (name, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)) == 0)
|
||
return false;
|
||
}
|
||
#endif
|
||
|
||
/* devo/gcc/config/dbxcoff.h defines ASM_OUTPUT_SOURCE_LINE to generate local line numbers as .LM<number>, so treat these as local. */
|
||
|
||
switch (name[0])
|
||
{
|
||
case 'L': return true;
|
||
case '.': return (name[1] == 'L' && name[2] == 'M') ? true : false;
|
||
default: return false; /* Cannot make our minds up - default to false so that it will not be stripped by accident. */
|
||
}
|
||
}
|
||
#endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
|
||
|
||
#define coff_bfd_is_local_label_name coff_arm_is_local_label_name
|
||
#define coff_adjust_symndx coff_arm_adjust_symndx
|
||
|
||
#define coff_link_output_has_begun coff_arm_link_output_has_begun
|
||
#define coff_final_link_postscript coff_arm_final_link_postscript
|
||
#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
|
||
|
||
extern boolean coff_arm_final_link_postscript ();
|
||
extern boolean coff_arm_bfd_set_private_flags ();
|
||
extern boolean coff_arm_bfd_merge_private_bfd_data ();
|
||
extern boolean coff_arm_link_output_has_begun ();
|
||
extern boolean coff_arm_is_local_label_name ();
|
||
|
||
#if defined COFF_IMAGE_WITH_PE || ! defined COFF_WITH_PE
|
||
/* This piece of machinery exists only to guarantee that the bfd that holds
|
||
the glue section is written last.
|
||
|
||
This does depend on bfd_make_section attaching a new section to the
|
||
end of the section list for the bfd.
|
||
|
||
krk@cygnus.com */
|
||
|
||
boolean
|
||
coff_arm_link_output_has_begun (sub)
|
||
bfd * sub;
|
||
{
|
||
return (sub->output_has_begun || sub == bfd_of_glue_owner);
|
||
}
|
||
|
||
boolean
|
||
coff_arm_final_link_postscript (abfd, pfinfo)
|
||
bfd * abfd;
|
||
struct coff_final_link_info * pfinfo;
|
||
{
|
||
if (bfd_of_glue_owner != NULL)
|
||
{
|
||
if (! _bfd_coff_link_input_bfd (pfinfo, bfd_of_glue_owner))
|
||
return false;
|
||
bfd_of_glue_owner->output_has_begun = true;
|
||
}
|
||
return true;
|
||
}
|
||
#endif /* COFF_IMAGE_WITH_PE or not COFF_WITH_PE */
|
||
|
||
#define coff_SWAP_sym_in arm_bfd_coff_swap_sym_in
|
||
|
||
static void coff_swap_sym_in PARAMS ((bfd *, PTR, PTR));
|
||
|
||
/* Sepcial version of symbol swapper, used to grab a bfd
|
||
onto which the glue sections can be attached. */
|
||
static void
|
||
arm_bfd_coff_swap_sym_in (abfd, ext1, in1)
|
||
bfd * abfd;
|
||
PTR ext1;
|
||
PTR in1;
|
||
{
|
||
flagword flags;
|
||
register asection * s;
|
||
|
||
/* Do the normal swap in. */
|
||
coff_swap_sym_in (abfd, ext1, in1);
|
||
|
||
if (bfd_of_glue_owner != NULL) /* we already have a toc, so go home */
|
||
return;
|
||
|
||
/* Save the bfd for later allocation. */
|
||
bfd_of_glue_owner = abfd;
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner ,
|
||
ARM2THUMB_GLUE_SECTION_NAME);
|
||
|
||
if (s == NULL)
|
||
{
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;
|
||
|
||
s = bfd_make_section (bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
|
||
|
||
if (s == NULL
|
||
|| !bfd_set_section_flags (bfd_of_glue_owner, s, flags)
|
||
|| !bfd_set_section_alignment (bfd_of_glue_owner, s, 2))
|
||
{
|
||
/* FIXME: set appropriate bfd error */
|
||
abort();
|
||
}
|
||
}
|
||
|
||
s = bfd_get_section_by_name (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
||
|
||
if (s == NULL)
|
||
{
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY ;
|
||
|
||
s = bfd_make_section (bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
|
||
|
||
if (s == NULL
|
||
|| !bfd_set_section_flags (bfd_of_glue_owner, s, flags)
|
||
|| !bfd_set_section_alignment (bfd_of_glue_owner, s, 2))
|
||
{
|
||
/* FIXME: set appropriate bfd error krk@cygnus.com */
|
||
abort();
|
||
}
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
#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),
|
||
|
||
(PTR) & bfd_coff_std_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),
|
||
|
||
(PTR) & bfd_coff_std_swap_table,
|
||
};
|