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535 lines
16 KiB
C
535 lines
16 KiB
C
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/* D10V-specific support for 32-bit ELF
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Copyright (C) 1996 Free Software Foundation, Inc.
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Contributed by Martin Hunt (hunt@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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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/* #include "elf/d10v.h" */
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static reloc_howto_type *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 d10v_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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/* Use REL instead of RELA to save space */
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#define USE_REL
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enum reloc_type
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{
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R_D10V_NONE = 0,
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R_D10V_10_PCREL_R,
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R_D10V_10_PCREL_L,
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R_D10V_16,
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R_D10V_18,
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R_D10V_18_PCREL,
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R_D10V_32,
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R_D10V_GNU_VTINHERIT,
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R_D10V_GNU_VTENTRY,
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R_D10V_max
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};
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static reloc_howto_type elf_d10v_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_D10V_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_D10V_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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/* An PC Relative 10-bit relocation, shifted by 2 */
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/* right container */
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HOWTO (R_D10V_10_PCREL_R, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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true, /* 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_D10V_10_PCREL_R", /* name */
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false, /* partial_inplace */
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0xff, /* src_mask */
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0xff, /* dst_mask */
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true), /* pcrel_offset */
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/* An PC Relative 10-bit relocation, shifted by 2 */
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/* left container */
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HOWTO (R_D10V_10_PCREL_L, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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10, /* bitsize */
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true, /* pc_relative */
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15, /* 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_D10V_10_PCREL_L", /* name */
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false, /* partial_inplace */
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0x07f8000, /* src_mask */
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0x07f8000, /* dst_mask */
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true), /* pcrel_offset */
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/* A 16 bit absolute relocation */
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HOWTO (R_D10V_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_D10V_16", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An 18 bit absolute relocation, right shifted 2 */
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HOWTO (R_D10V_18, /* type */
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2, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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18, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_D10V_18", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A relative 18 bit relocation, right shifted by 2 */
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HOWTO (R_D10V_18_PCREL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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18, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_D10V_18_PCREL", /* name */
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false, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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true), /* pcrel_offset */
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/* A 32 bit absolute relocation */
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HOWTO (R_D10V_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_D10V_32", /* name */
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false, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy */
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HOWTO (R_D10V_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_D10V_GNU_VTINHERIT", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage */
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HOWTO (R_D10V_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_D10V_GNU_VTENTRY", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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};
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/* Map BFD reloc types to D10V ELF reloc types. */
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struct d10v_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct d10v_reloc_map d10v_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_D10V_NONE, },
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{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
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{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
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{ BFD_RELOC_16, R_D10V_16 },
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{ BFD_RELOC_D10V_18, R_D10V_18 },
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{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
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{ BFD_RELOC_32, R_D10V_32 },
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{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
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{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
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};
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static reloc_howto_type *
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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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unsigned int i;
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for (i = 0;
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i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
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i++)
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{
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if (d10v_reloc_map[i].bfd_reloc_val == code)
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return &elf_d10v_howto_table[d10v_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 D10V ELF reloc. */
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static void
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d10v_info_to_howto_rel (abfd, cache_ptr, dst)
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bfd *abfd;
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arelent *cache_ptr;
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Elf32_Internal_Rel *dst;
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
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cache_ptr->howto = &elf_d10v_howto_table[r_type];
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}
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static asection *
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elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym)
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bfd *abfd;
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struct bfd_link_info *info;
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Elf_Internal_Rela *rel;
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struct elf_link_hash_entry *h;
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Elf_Internal_Sym *sym;
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{
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if (h != NULL)
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{
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switch (ELF32_R_TYPE (rel->r_info))
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{
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case R_D10V_GNU_VTINHERIT:
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case R_D10V_GNU_VTENTRY:
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break;
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default:
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switch (h->root.type)
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{
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case bfd_link_hash_defined:
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case bfd_link_hash_defweak:
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return h->root.u.def.section;
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case bfd_link_hash_common:
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return h->root.u.c.p->section;
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}
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}
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}
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else
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{
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if (!(elf_bad_symtab (abfd)
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&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
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&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
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&& sym->st_shndx != SHN_COMMON))
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{
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return bfd_section_from_elf_index (abfd, sym->st_shndx);
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}
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}
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return NULL;
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}
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static boolean
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elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
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bfd *abfd;
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struct bfd_link_info *info;
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asection *sec;
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const Elf_Internal_Rela *relocs;
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{
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/* we don't use got and plt entries for d10v */
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return true;
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}
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/* Look through the relocs for a section during the first phase.
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Since we don't do .gots or .plts, we just need to consider the
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virtual table relocs for gc. */
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static boolean
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elf32_d10v_check_relocs (abfd, info, sec, relocs)
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bfd *abfd;
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struct bfd_link_info *info;
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asection *sec;
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const Elf_Internal_Rela *relocs;
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{
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Elf_Internal_Shdr *symtab_hdr;
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struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
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const Elf_Internal_Rela *rel;
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const Elf_Internal_Rela *rel_end;
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if (info->relocateable)
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return true;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (abfd);
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sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
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if (!elf_bad_symtab (abfd))
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sym_hashes_end -= symtab_hdr->sh_info;
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rel_end = relocs + sec->reloc_count;
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for (rel = relocs; rel < rel_end; rel++)
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{
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struct elf_link_hash_entry *h;
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unsigned long r_symndx;
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r_symndx = ELF32_R_SYM (rel->r_info);
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if (r_symndx < symtab_hdr->sh_info)
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h = NULL;
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else
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h = sym_hashes[r_symndx - symtab_hdr->sh_info];
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switch (ELF32_R_TYPE (rel->r_info))
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{
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/* This relocation describes the C++ object vtable hierarchy.
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Reconstruct it for later use during GC. */
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case R_D10V_GNU_VTINHERIT:
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if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
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return false;
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break;
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/* This relocation describes which C++ vtable entries are actually
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used. Record for later use during GC. */
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case R_D10V_GNU_VTENTRY:
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if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
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return false;
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break;
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}
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}
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return true;
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}
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/* Relocate a D10V ELF section. */
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static boolean
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elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
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contents, relocs, local_syms, local_sections)
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bfd *output_bfd;
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struct bfd_link_info *info;
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bfd *input_bfd;
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asection *input_section;
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bfd_byte *contents;
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Elf_Internal_Rela *relocs;
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Elf_Internal_Sym *local_syms;
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asection **local_sections;
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{
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Elf_Internal_Shdr *symtab_hdr;
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struct elf_link_hash_entry **sym_hashes;
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Elf_Internal_Rela *rel, *relend;
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const char *name;
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symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (input_bfd);
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rel = relocs;
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relend = relocs + input_section->reloc_count;
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for (; rel < relend; rel++)
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{
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int r_type;
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reloc_howto_type *howto;
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unsigned long r_symndx;
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Elf_Internal_Sym *sym;
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asection *sec;
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struct elf_link_hash_entry *h;
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bfd_vma relocation;
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bfd_reloc_status_type r;
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r_symndx = ELF32_R_SYM (rel->r_info);
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r_type = ELF32_R_TYPE (rel->r_info);
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if (r_type == R_D10V_GNU_VTENTRY
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|| r_type == R_D10V_GNU_VTINHERIT )
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continue;
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howto = elf_d10v_howto_table + r_type;
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if (info->relocateable)
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{
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/* This is a relocateable link. We don't have to change
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anything, unless the reloc is against a section symbol,
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in which case we have to adjust according to where the
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section symbol winds up in the output section. */
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if (r_symndx < symtab_hdr->sh_info)
|
||
|
{
|
||
|
sym = local_syms + r_symndx;
|
||
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
|
{
|
||
|
sec = local_sections[r_symndx];
|
||
|
rel->r_addend += sec->output_offset + sym->st_value;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
/* This is a final link. */
|
||
|
h = NULL;
|
||
|
sym = NULL;
|
||
|
sec = NULL;
|
||
|
if (r_symndx < symtab_hdr->sh_info)
|
||
|
{
|
||
|
sym = local_syms + r_symndx;
|
||
|
sec = local_sections[r_symndx];
|
||
|
relocation = (sec->output_section->vma
|
||
|
+ sec->output_offset
|
||
|
+ sym->st_value);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
while (h->root.type == bfd_link_hash_indirect
|
||
|
|| h->root.type == bfd_link_hash_warning)
|
||
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
if (h->root.type == bfd_link_hash_defined
|
||
|
|| h->root.type == bfd_link_hash_defweak)
|
||
|
{
|
||
|
sec = h->root.u.def.section;
|
||
|
relocation = (h->root.u.def.value
|
||
|
+ sec->output_section->vma
|
||
|
+ sec->output_offset);
|
||
|
}
|
||
|
else if (h->root.type == bfd_link_hash_undefweak)
|
||
|
relocation = 0;
|
||
|
else
|
||
|
{
|
||
|
if (!((*info->callbacks->undefined_symbol)
|
||
|
(info, h->root.root.string, input_bfd,
|
||
|
input_section, rel->r_offset)))
|
||
|
return false;
|
||
|
relocation = 0;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (h != NULL)
|
||
|
name = h->root.root.string;
|
||
|
else
|
||
|
{
|
||
|
name = (bfd_elf_string_from_elf_section
|
||
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
|
if (name == NULL || *name == '\0')
|
||
|
name = bfd_section_name (input_bfd, sec);
|
||
|
}
|
||
|
|
||
|
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
|
contents, rel->r_offset,
|
||
|
relocation, rel->r_addend);
|
||
|
|
||
|
if (r != bfd_reloc_ok)
|
||
|
{
|
||
|
const char * msg = (const char *) 0;
|
||
|
|
||
|
switch (r)
|
||
|
{
|
||
|
case bfd_reloc_overflow:
|
||
|
if (!((*info->callbacks->reloc_overflow)
|
||
|
(info, name, howto->name, (bfd_vma) 0,
|
||
|
input_bfd, input_section, rel->r_offset)))
|
||
|
return false;
|
||
|
break;
|
||
|
|
||
|
case bfd_reloc_undefined:
|
||
|
if (!((*info->callbacks->undefined_symbol)
|
||
|
(info, name, input_bfd, input_section,
|
||
|
rel->r_offset)))
|
||
|
return false;
|
||
|
break;
|
||
|
|
||
|
case bfd_reloc_outofrange:
|
||
|
msg = _ ("internal error: out of range error");
|
||
|
goto common_error;
|
||
|
|
||
|
case bfd_reloc_notsupported:
|
||
|
msg = _ ("internal error: unsupported relocation error");
|
||
|
goto common_error;
|
||
|
|
||
|
case bfd_reloc_dangerous:
|
||
|
msg = _ ("internal error: dangerous error");
|
||
|
goto common_error;
|
||
|
|
||
|
default:
|
||
|
msg = _ ("internal error: unknown error");
|
||
|
/* fall through */
|
||
|
|
||
|
common_error:
|
||
|
if (!((*info->callbacks->warning)
|
||
|
(info, msg, name, input_bfd, input_section,
|
||
|
rel->r_offset)))
|
||
|
return false;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
#define ELF_ARCH bfd_arch_d10v
|
||
|
#define ELF_MACHINE_CODE EM_CYGNUS_D10V
|
||
|
#define ELF_MAXPAGESIZE 0x1000
|
||
|
|
||
|
#define TARGET_BIG_SYM bfd_elf32_d10v_vec
|
||
|
#define TARGET_BIG_NAME "elf32-d10v"
|
||
|
|
||
|
#define elf_info_to_howto 0
|
||
|
#define elf_info_to_howto_rel d10v_info_to_howto_rel
|
||
|
#define elf_backend_object_p 0
|
||
|
#define elf_backend_final_write_processing 0
|
||
|
#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
|
||
|
#define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
|
||
|
#define elf_backend_check_relocs elf32_d10v_check_relocs
|
||
|
#define elf_backend_relocate_section elf32_d10v_relocate_section
|
||
|
#define elf_backend_can_gc_sections 1
|
||
|
|
||
|
#include "elf32-target.h"
|