159 lines
5.5 KiB
C
159 lines
5.5 KiB
C
/* ARC-specific support for 32-bit ELF
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Copyright (C) 1994 Free Software Foundation, Inc.
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Contributed by Doug Evans (dje@cygnus.com).
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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., 675 Mass Ave, Cambridge, MA 02139, 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 "libelf.h"
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static bfd_reloc_status_type arc_elf_unsupported_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void arc_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
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enum reloc_type
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{
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R_ARC_NONE = 0,
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R_ARC_ADDR32,
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R_ARC_B22_PCREL,
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R_ARC_max
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};
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static reloc_howto_type elf_arc_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_ARC_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARC_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 32 bit relocation. */
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HOWTO (R_ARC_ADDR32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARC_ADDR32", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A relative 22 bit branch; the lower two bits must be zero. */
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HOWTO (R_ARC_B22_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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22, /* bitsize */
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true, /* pc_relative */
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7, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_ARC_B22_PCREL", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x07ffff80, /* dst_mask */
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true), /* pcrel_offset */
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};
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/* Don't pretend we can deal with unsupported relocs. */
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static bfd_reloc_status_type
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arc_elf_unsupported_reloc (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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abort ();
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}
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/* Map BFD reloc types to PowerPC ELF reloc types. */
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struct arc_reloc_map
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{
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unsigned char bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct arc_reloc_map arc_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_ARC_NONE, },
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{ BFD_RELOC_32, R_ARC_ADDR32 },
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{ BFD_RELOC_CTOR, R_ARC_ADDR32 },
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{ BFD_RELOC_ARC_B22_PCREL, R_ARC_B22_PCREL },
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};
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static const struct reloc_howto_struct *
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bfd_elf32_bfd_reloc_type_lookup (abfd, code)
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bfd *abfd;
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bfd_reloc_code_real_type code;
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{
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int i;
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for (i = 0;
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i < sizeof (arc_reloc_map) / sizeof (struct arc_reloc_map);
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i++)
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{
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if (arc_reloc_map[i].bfd_reloc_val == code)
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return &elf_arc_howto_table[arc_reloc_map[i].elf_reloc_val];
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}
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return NULL;
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}
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/* Set the howto pointer for an ARC ELF reloc. */
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static void
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arc_info_to_howto (abfd, cache_ptr, dst)
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bfd *abfd;
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arelent *cache_ptr;
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Elf32_Internal_Rela *dst;
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{
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BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_ARC_max);
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cache_ptr->howto = &elf_arc_howto_table[ELF32_R_TYPE (dst->r_info)];
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}
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#define TARGET_BIG_SYM bfd_elf32_arc_vec
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#define TARGET_BIG_NAME "elf32-arc"
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#define ELF_ARCH bfd_arch_arc
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#define ELF_MACHINE_CODE EM_CYGNUS_ARC
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#define ELF_MAXPAGESIZE 0x10000
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#define elf_info_to_howto arc_info_to_howto
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#include "elf32-target.h"
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