1439 lines
50 KiB
C
1439 lines
50 KiB
C
/* PowerPC-specific support for 32-bit ELF
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Copyright 1994, 1995 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, 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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/* This file is based on a preliminary PowerPC ELF ABI. The
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information may not match the final PowerPC ELF ABI. It includes
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suggestions from the in-progress Embedded PowerPC ABI, and that
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information may also not match. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "libelf.h"
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#include "elf/ppc.h"
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static bfd_reloc_status_type ppc_elf_unsupported_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type ppc_elf_std_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_vma ppc_elf_addr16_ha_inner PARAMS ((bfd_vma));
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static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_vma ppc_elf_got16_inner PARAMS ((asection *sec));
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static bfd_reloc_status_type ppc_elf_got16_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static reloc_howto_type *ppc_elf_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void ppc_elf_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
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static void ppc_elf_howto_init PARAMS ((void));
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static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
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static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
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static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
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static boolean ppc_elf_relocate_section PARAMS ((bfd *,
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struct bfd_link_info *info,
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bfd *,
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asection *,
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bfd_byte *,
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Elf_Internal_Rela *relocs,
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Elf_Internal_Sym *local_syms,
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asection **));
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#define USE_RELA
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enum reloc_type
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{
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R_PPC_NONE = 0, /* 0 */
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R_PPC_ADDR32, /* 1 */
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R_PPC_ADDR24, /* 2 */
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R_PPC_ADDR16, /* 3 */
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R_PPC_ADDR16_LO, /* 4 */
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R_PPC_ADDR16_HI, /* 5 */
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R_PPC_ADDR16_HA, /* 6 */
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R_PPC_ADDR14, /* 7 */
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R_PPC_ADDR14_BRTAKEN, /* 8 */
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R_PPC_ADDR14_BRNTAKEN, /* 9 */
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R_PPC_REL24, /* 10 */
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R_PPC_REL14, /* 11 */
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R_PPC_REL14_BRTAKEN, /* 12 */
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R_PPC_REL14_BRNTAKEN, /* 13 */
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R_PPC_GOT16, /* 14 */
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R_PPC_GOT16_LO, /* 15 */
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R_PPC_GOT16_HI, /* 16 */
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R_PPC_GOT16_HA, /* 17 */
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R_PPC_PLTREL24, /* 18 */
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R_PPC_COPY, /* 19 */
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R_PPC_GLOB_DAT, /* 20 */
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R_PPC_JMP_SLOT, /* 21 */
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R_PPC_RELATIVE, /* 22 */
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R_PPC_LOCAL24PC, /* 23 */
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R_PPC_UADDR32, /* 24 */
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R_PPC_UADDR16, /* 25 */
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R_PPC_REL32, /* 26 */
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R_PPC_PLT32, /* 27 */
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R_PPC_PLTREL32, /* 28 */
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R_PPC_PLT16_LO, /* 29 */
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R_PPC_PLT16_HI, /* 30 */
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R_PPC_PLT16_HA, /* 31 */
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R_PPC_SDAREL16, /* 32 */
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/* Relocations added by Sun. */
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R_PPC_SECTOFF, /* 33 */
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R_PPC_SECTOFF_LO, /* 34 */
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R_PPC_SECTOFF_HI, /* 35 */
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R_PPC_SECTOFF_HA, /* 36 */
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/* The remaining relocs are from the Embedded ELF ABI, and are not
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in the SVR4 ELF ABI. */
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R_PPC_EMB_NADDR32 = 101, /* 101 */
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R_PPC_EMB_NADDR16, /* 102 */
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R_PPC_EMB_NADDR16_LO, /* 103 */
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R_PPC_EMB_NADDR16_HI, /* 104 */
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R_PPC_EMB_NADDR16_HA, /* 105 */
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R_PPC_EMB_SDAI16, /* 106 */
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R_PPC_EMB_SDA2I16, /* 107 */
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R_PPC_EMB_SDA2REL, /* 108 */
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R_PPC_EMB_SDA21, /* 109 */
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R_PPC_EMB_MRKREF, /* 110 */
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R_PPC_EMB_RELSEC16, /* 111 */
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R_PPC_EMB_RELST_LO, /* 112 */
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R_PPC_EMB_RELST_HI, /* 113 */
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R_PPC_EMB_RELST_HA, /* 114 */
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R_PPC_EMB_BIT_FLD, /* 115 */
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R_PPC_EMB_RELSDA, /* 116 */
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R_PPC_max
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};
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static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ];
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static reloc_howto_type ppc_elf_howto_raw[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_PPC_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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ppc_elf_std_reloc, /* special_function */
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"R_PPC_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_PPC_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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ppc_elf_std_reloc, /* special_function */
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"R_PPC_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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/* An absolute 26 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC_ADDR24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* 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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ppc_elf_std_reloc, /* special_function */
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"R_PPC_ADDR24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_PPC_ADDR16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc_elf_std_reloc, /* special_function */
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"R_PPC_ADDR16", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit relocation without overflow. */
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HOWTO (R_PPC_ADDR16_LO, /* 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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ppc_elf_std_reloc, /* special_function */
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"R_PPC_ADDR16_LO", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* The high order 16 bits of an address. */
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HOWTO (R_PPC_ADDR16_HI, /* type */
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16, /* 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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ppc_elf_std_reloc, /* special_function */
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"R_PPC_ADDR16_HI", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* The high order 16 bits of an address, plus 1 if the contents of
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the low 16 bits, treated as a signed number, is negative. */
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HOWTO (R_PPC_ADDR16_HA, /* type */
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16, /* 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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ppc_elf_addr16_ha_reloc, /* special_function */
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"R_PPC_ADDR16_HA", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC_ADDR14, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc_elf_std_reloc, /* special_function */
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"R_PPC_ADDR14", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is expected to be taken. The lower two
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bits must be zero. */
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HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc_elf_unsupported_reloc, /* special_function */
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"R_PPC_ADDR14_BRTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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||
false), /* pcrel_offset */
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||
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||
/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is not expected to be taken. The lower
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two bits must be zero. */
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HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
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0, /* rightshift */
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||
1, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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ppc_elf_unsupported_reloc, /* special_function */
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"R_PPC_ADDR14_BRNTAKEN",/* name */
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||
false, /* partial_inplace */
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||
0, /* src_mask */
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||
0xfffc, /* dst_mask */
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||
false), /* pcrel_offset */
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||
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||
/* A relative 26 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC_REL24, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* 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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||
ppc_elf_std_reloc, /* special_function */
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||
"R_PPC_REL24", /* name */
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||
false, /* partial_inplace */
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||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
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||
true), /* pcrel_offset */
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||
|
||
/* A relative 16 bit branch; the lower two bits must be zero. */
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||
HOWTO (R_PPC_REL14, /* type */
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||
0, /* rightshift */
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||
1, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
true, /* pc_relative */
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||
0, /* bitpos */
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||
complain_overflow_signed, /* complain_on_overflow */
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||
ppc_elf_std_reloc, /* special_function */
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||
"R_PPC_REL14", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is expected to be taken. The lower two bits must be
|
||
zero. */
|
||
HOWTO (R_PPC_REL14_BRTAKEN, /* type */
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||
0, /* rightshift */
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||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
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||
true, /* pc_relative */
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||
0, /* bitpos */
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||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_REL14_BRTAKEN", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is not expected to be taken. The lower two bits must
|
||
be zero. */
|
||
HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
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||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_REL14_BRNTAKEN",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16, but referring to the GOT table entry for the
|
||
symbol. */
|
||
HOWTO (R_PPC_GOT16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_got16_reloc, /* special_function */
|
||
"R_PPC_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_GOT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_got16_reloc, /* special_function */
|
||
"R_PPC_GOT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_GOT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_got16_reloc, /* special_function */
|
||
"R_PPC_GOT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
|
||
the symbol. FIXME: Not supported. */
|
||
HOWTO (R_PPC_GOT16_HA, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_GOT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_REL24, but referring to the procedure linkage table
|
||
entry for the symbol. FIXME: Not supported. */
|
||
HOWTO (R_PPC_PLTREL24, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_PLTREL24", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* This is used only by the dynamic linker. The symbol should exist
|
||
both in the object being run and in some shared library. The
|
||
dynamic linker copies the data addressed by the symbol from the
|
||
shared library into the object. I have no idea what the purpose
|
||
of this is. */
|
||
HOWTO (R_PPC_COPY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_COPY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR32, but used when setting global offset table
|
||
entries. */
|
||
HOWTO (R_PPC_GLOB_DAT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_GLOB_DAT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Marks a procedure linkage table entry for a symbol. */
|
||
HOWTO (R_PPC_JMP_SLOT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_JMP_SLOT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Used only by the dynamic linker. When the object is run, this
|
||
longword is set to the load address of the object, plus the
|
||
addend. */
|
||
HOWTO (R_PPC_RELATIVE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_RELATIVE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_REL24, but uses the value of the symbol within the
|
||
object rather than the final value. Normally used for
|
||
_GLOBAL_OFFSET_TABLE_. FIXME: Not supported. */
|
||
HOWTO (R_PPC_LOCAL24PC, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_LOCAL24PC", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR32, but may be unaligned. */
|
||
HOWTO (R_PPC_UADDR32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_UADDR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16, but may be unaligned. */
|
||
HOWTO (R_PPC_UADDR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_UADDR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative */
|
||
HOWTO (R_PPC_REL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_std_reloc, /* special_function */
|
||
"R_PPC_REL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 32-bit relocation to the symbol's procedure linkage table.
|
||
FIXEME: not supported. */
|
||
HOWTO (R_PPC_PLT32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_PLT32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
|
||
FIXEME: not supported. */
|
||
HOWTO (R_PPC_PLTREL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_PLTREL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_PLT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_PLT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_PLT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_PLT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
|
||
the symbol. FIXME: Not supported. */
|
||
HOWTO (R_PPC_PLT16_HA, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_PLT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A sign-extended 16 bit value relative to _SDA_BASE, for use with
|
||
small data items. */
|
||
HOWTO (R_PPC_SDAREL16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
ppc_elf_got16_reloc, /* special_function */
|
||
"R_PPC_SDAREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* These next 4 relocations were added by Sun. */
|
||
/* 32-bit section relative relocation. FIXME: not supported. */
|
||
HOWTO (R_PPC_SECTOFF, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_SECTOFF", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 16-bit lower half section relative relocation. FIXME: not supported. */
|
||
HOWTO (R_PPC_SECTOFF_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_SECTOFF_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half section relative relocation. FIXME: not supported. */
|
||
HOWTO (R_PPC_SECTOFF_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_SECTOFF_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half adjusted section relative relocation. FIXME: not supported. */
|
||
HOWTO (R_PPC_SECTOFF_HA, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_SECTOFF_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The remaining relocs are from the Embedded ELF ABI, and are not
|
||
in the SVR4 ELF ABI. */
|
||
|
||
/* 32 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_EMB_NADDR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_EMB_NADDR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont,/* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_EMB_ADDR16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high order 16 bits of the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_EMB_NADDR16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high order 16 bits of the result of the addend minus the address,
|
||
plus 1 if the contents of the low 16 bits, treated as a signed number,
|
||
is negative. */
|
||
HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
ppc_elf_unsupported_reloc, /* special_function */
|
||
"R_PPC_EMB_NADDR16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
};
|
||
|
||
|
||
/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
|
||
|
||
static void
|
||
ppc_elf_howto_init ()
|
||
{
|
||
unsigned int i, type;
|
||
|
||
for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
|
||
{
|
||
type = ppc_elf_howto_raw[i].type;
|
||
BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0]));
|
||
ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
|
||
}
|
||
}
|
||
|
||
|
||
static reloc_howto_type *
|
||
ppc_elf_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
enum reloc_type ppc_reloc = R_PPC_NONE;
|
||
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
switch ((int)code)
|
||
{
|
||
default:
|
||
return (reloc_howto_type *)NULL;
|
||
|
||
case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break;
|
||
case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break;
|
||
case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break;
|
||
case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break;
|
||
case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break;
|
||
case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break;
|
||
case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break;
|
||
case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break;
|
||
case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break;
|
||
case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break;
|
||
case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break;
|
||
case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break;
|
||
case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break;
|
||
case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break;
|
||
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_GOT16; break;
|
||
case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break;
|
||
case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break;
|
||
case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break;
|
||
case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break;
|
||
case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break;
|
||
case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break;
|
||
case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break;
|
||
case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break;
|
||
case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break;
|
||
case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break;
|
||
case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break;
|
||
case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break;
|
||
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break;
|
||
case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break;
|
||
case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break;
|
||
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break;
|
||
case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break;
|
||
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break;
|
||
case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break;
|
||
}
|
||
|
||
return ppc_elf_howto_table[ (int)ppc_reloc ];
|
||
};
|
||
|
||
/* Set the howto pointer for a PowerPC ELF reloc. */
|
||
|
||
static void
|
||
ppc_elf_info_to_howto (abfd, cache_ptr, dst)
|
||
bfd *abfd;
|
||
arelent *cache_ptr;
|
||
Elf32_Internal_Rela *dst;
|
||
{
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
|
||
cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
|
||
}
|
||
|
||
/* Function to set whether a module needs the -mrelocatable bit set. */
|
||
|
||
static boolean
|
||
ppc_elf_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
BFD_ASSERT (!elf_ppc_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_ppc_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Copy backend specific data from one object module to another */
|
||
static boolean
|
||
ppc_elf_copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
/* This function is selected based on the input vector. We only
|
||
want to copy information over if the output BFD also uses Elf
|
||
format. */
|
||
if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
BFD_ASSERT (!elf_ppc_flags_init (obfd)
|
||
|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
|
||
|
||
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_ppc_flags_init (obfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking */
|
||
static boolean
|
||
ppc_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags;
|
||
flagword new_flags;
|
||
|
||
/* Check if we have the same endianess */
|
||
if (ibfd->xvec->byteorder_big_p != obfd->xvec->byteorder_big_p)
|
||
{
|
||
fprintf (stderr,
|
||
"%s: compiled for a %s endian system and target is %s endian.\n",
|
||
bfd_get_filename (ibfd),
|
||
(ibfd->xvec->byteorder_big_p) ? "big" : "little",
|
||
(obfd->xvec->byteorder_big_p) ? "big" : "little");
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
|
||
/* This function is selected based on the input vector. We only
|
||
want to copy information over if the output BFD also uses Elf
|
||
format. */
|
||
if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
if (!elf_ppc_flags_init (obfd)) /* First call, no flags set */
|
||
{
|
||
elf_ppc_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = new_flags;
|
||
}
|
||
|
||
else if (new_flags == old_flags) /* Compatible flags are ok */
|
||
;
|
||
|
||
else /* Incompatible flags */
|
||
{
|
||
/* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
|
||
with either. */
|
||
if ((new_flags & EF_PPC_RELOCATABLE) != 0
|
||
&& (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
|
||
{
|
||
fprintf (stderr,
|
||
"%s: compiled with -mrelocatable and linked with modules compiled normally\n",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
|
||
&& (old_flags & EF_PPC_RELOCATABLE) != 0)
|
||
{
|
||
fprintf (stderr,
|
||
"%s: compiled normally and linked with modules compiled with -mrelocatable\n",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
else if ((new_flags & EF_PPC_RELOCATABLE_LIB) != 0)
|
||
elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE_LIB;
|
||
|
||
new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB);
|
||
old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB);
|
||
|
||
/* Warn about eabi vs. V.4 mismatch */
|
||
if ((new_flags & EF_PPC_EMB) != 0 && (old_flags & EF_PPC_EMB) == 0)
|
||
{
|
||
new_flags &= ~EF_PPC_EMB;
|
||
fprintf (stderr,
|
||
"%s: compiled for the eabi and linked with modules compiled for System V\n",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
else if ((new_flags & EF_PPC_EMB) == 0 && (old_flags & EF_PPC_EMB) != 0)
|
||
{
|
||
old_flags &= ~EF_PPC_EMB;
|
||
fprintf (stderr,
|
||
"%s: compiled for System V and linked with modules compiled for eabi\n",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
|
||
/* Warn about any other mismatches */
|
||
if (new_flags != old_flags)
|
||
fprintf (stderr,
|
||
"%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)\n",
|
||
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* ELF relocs are against symbols. If we are producing relocateable
|
||
output, and the reloc is against an external symbol, and nothing
|
||
has given us any additional addend, the resulting reloc will also
|
||
be against the same symbol. In such a case, we don't want to
|
||
change anything about the way the reloc is handled, since it will
|
||
all be done at final link time. Rather than put special case code
|
||
into bfd_perform_relocation, all the reloc types use this howto
|
||
function. It just short circuits the reloc if producing
|
||
relocateable output against an external symbol. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_reloc_status_type
|
||
ppc_elf_std_reloc (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;
|
||
{
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* Don't pretend we can deal with unsupported relocs. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_reloc_status_type
|
||
ppc_elf_unsupported_reloc (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_ASSERT (reloc_entry->howto != (reloc_howto_type *)0);
|
||
fprintf (stderr,
|
||
"%s: Relocation %s (%d) is not currently supported.\n",
|
||
bfd_get_filename (abfd),
|
||
reloc_entry->howto->name,
|
||
reloc_entry->howto->type);
|
||
|
||
return bfd_reloc_notsupported;
|
||
}
|
||
|
||
/* Internal function to return the adjustment to the addend for relocations
|
||
that return the upper 16 bits after sign extending the lower 16 bits, ie
|
||
for use with a ADDIS instruction followed by a memory reference using the
|
||
bottom 16 bits. */
|
||
|
||
INLINE
|
||
static bfd_vma
|
||
ppc_elf_addr16_ha_inner (relocation)
|
||
bfd_vma relocation;
|
||
{
|
||
return (relocation & 0x8000) << 1;
|
||
}
|
||
|
||
/* Handle the ADDR16_HA reloc by adjusting the reloc addend. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_reloc_status_type
|
||
ppc_elf_addr16_ha_reloc (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;
|
||
asection *sec;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
return ppc_elf_std_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
sec = symbol->section;
|
||
relocation = (((bfd_is_com_section (sec)) ? 0 : symbol->value)
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ reloc_entry->addend);
|
||
|
||
reloc_entry->addend += ppc_elf_addr16_ha_inner (relocation);
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* Internal function to return the addjustment to the addend for GOT16
|
||
entries */
|
||
|
||
INLINE
|
||
static bfd_vma
|
||
ppc_elf_got16_inner (sec)
|
||
asection *sec;
|
||
{
|
||
BFD_ASSERT (bfd_is_und_section (sec)
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".sdata") == 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".sbss") == 0)
|
||
|
||
return -(sec->output_section->vma + 0x8000);
|
||
}
|
||
|
||
/* Handle the GOT16 reloc. We want to use the offset within the .got
|
||
section, not the actual VMA. This is appropriate when generating
|
||
an embedded ELF object, for which the .got section acts like the
|
||
AIX .toc section. When and if we support PIC code, we will have to
|
||
change this, perhaps by switching off on the e_type field. */
|
||
|
||
/*ARGSUSED*/
|
||
static bfd_reloc_status_type
|
||
ppc_elf_got16_reloc (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;
|
||
{
|
||
if (output_bfd != (bfd *) NULL)
|
||
return ppc_elf_std_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
reloc_entry->addend += ppc_elf_got16_inner (bfd_get_section (*reloc_entry->sym_ptr_ptr));
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
|
||
/* The RELOCATE_SECTION function is called by the ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjust the section contents as
|
||
necessary, and (if using Rela relocs and generating a
|
||
relocateable output file) adjusting the reloc addend as
|
||
necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocateable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static boolean
|
||
ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *relocs;
|
||
Elf_Internal_Sym *local_syms;
|
||
asection **local_sections;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
||
Elf_Internal_Rela *rel = relocs;
|
||
Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
|
||
boolean ret = true;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
|
||
bfd_get_filename (input_bfd),
|
||
bfd_section_name(input_bfd, input_section),
|
||
(long)input_section->reloc_count,
|
||
(info->relocateable) ? " (relocatable)" : "");
|
||
#endif
|
||
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
for (; rel < relend; rel++)
|
||
{
|
||
enum reloc_type r_type = (enum reloc_type)ELF32_R_TYPE (rel->r_info);
|
||
bfd_vma offset = rel->r_offset;
|
||
bfd_vma addend = rel->r_addend;
|
||
bfd_reloc_status_type r = bfd_reloc_other;
|
||
Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0;
|
||
asection *sec = (asection *)0;
|
||
struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
bfd_vma relocation;
|
||
|
||
/* Unknown relocation handling */
|
||
if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type])
|
||
{
|
||
fprintf (stderr,
|
||
"%s: Unknown relocation type %d\n",
|
||
bfd_get_filename (input_bfd),
|
||
(int)r_type);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
howto = ppc_elf_howto_table[(int)r_type];
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (info->relocateable)
|
||
{
|
||
/* This is a relocateable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
addend = rel->r_addend += sec->output_offset + sym->st_value;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name,
|
||
(int)r_type,
|
||
r_symndx,
|
||
(long)offset,
|
||
(long)addend);
|
||
#endif
|
||
continue;
|
||
}
|
||
|
||
/* This is a final link. */
|
||
|
||
/* Complain about known relocation that are not yet supported */
|
||
if (howto->special_function == ppc_elf_unsupported_reloc)
|
||
{
|
||
fprintf (stderr,
|
||
"%s: Relocation %s (%d) is not currently supported.\n",
|
||
bfd_get_filename (input_bfd),
|
||
howto->name,
|
||
(int)r_type);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
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];
|
||
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->shared)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
(*info->callbacks->undefined_symbol)(info,
|
||
h->root.root.string,
|
||
input_bfd,
|
||
input_section,
|
||
rel->r_offset);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
switch ((int)r_type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case (int)R_PPC_GOT16: /* GOT16 relocations */
|
||
case (int)R_PPC_GOT16_LO:
|
||
case (int)R_PPC_GOT16_HI:
|
||
case (int)R_PPC_SDAREL16:
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
addend += ppc_elf_got16_inner (sec);
|
||
break;
|
||
|
||
case (int)R_PPC_ADDR16_HA: /* arithmetic adjust relocations */
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
addend += ppc_elf_addr16_ha_inner (relocation + addend);
|
||
break;
|
||
}
|
||
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name,
|
||
(int)r_type,
|
||
r_symndx,
|
||
(long)offset,
|
||
(long)addend);
|
||
#endif
|
||
|
||
r = _bfd_final_link_relocate (howto,
|
||
input_bfd,
|
||
input_section,
|
||
contents,
|
||
offset,
|
||
relocation,
|
||
addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
ret = false;
|
||
switch (r)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
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)
|
||
break;
|
||
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
(*info->callbacks->reloc_overflow)(info,
|
||
name,
|
||
howto->name,
|
||
(bfd_vma) 0,
|
||
input_bfd,
|
||
input_section,
|
||
offset);
|
||
}
|
||
break;
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\n");
|
||
#endif
|
||
|
||
return ret;
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
|
||
#define TARGET_LITTLE_NAME "elf32-powerpcle"
|
||
#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
|
||
#define TARGET_BIG_NAME "elf32-powerpc"
|
||
#define ELF_ARCH bfd_arch_powerpc
|
||
#define ELF_MACHINE_CODE EM_PPC
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
#define elf_info_to_howto ppc_elf_info_to_howto
|
||
|
||
#ifdef EM_CYGNUS_POWERPC
|
||
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
|
||
#endif
|
||
|
||
#ifdef EM_PPC_OLD
|
||
#define ELF_MACHINE_ALT2 EM_PPC_OLD
|
||
#endif
|
||
|
||
#define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
|
||
#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
|
||
#define elf_backend_relocate_section ppc_elf_relocate_section
|
||
|
||
#include "elf32-target.h"
|