diff options
Diffstat (limited to 'bfd/elf32-ppc.c')
| -rw-r--r-- | bfd/elf32-ppc.c | 926 |
1 files changed, 926 insertions, 0 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c new file mode 100644 index 0000000..d00a7b2 --- /dev/null +++ b/bfd/elf32-ppc.c @@ -0,0 +1,926 @@ +/* PowerPC-specific support for 32-bit ELF + Copyright 1994, 1995 Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + +This file is part of BFD, the Binary File Descriptor library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* This file is based on a preliminary PowerPC ELF ABI. The + information may not match the final PowerPC ELF ABI. It includes + suggestions from the in-progress Embedded PowerPC ABI, and that + information may also not match. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "libelf.h" + +static bfd_reloc_status_type ppc_elf_unsupported_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_reloc_status_type ppc_elf_addr16_ha_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_reloc_status_type ppc_elf_got16_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup + PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); +static void powerpc_info_to_howto + PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst)); + +#define USE_RELA + +enum reloc_type +{ + R_PPC_NONE = 0, /* 0 */ + R_PPC_ADDR32, /* 1 */ + R_PPC_ADDR24, /* 2 */ + R_PPC_ADDR16, /* 3 */ + R_PPC_ADDR16_LO, /* 4 */ + R_PPC_ADDR16_HI, /* 5 */ + R_PPC_ADDR16_HA, /* 6 */ + R_PPC_ADDR14, /* 7 */ + R_PPC_ADDR14_BRTAKEN, /* 8 */ + R_PPC_ADDR14_BRNTAKEN, /* 9 */ + R_PPC_REL24, /* 10 */ + R_PPC_REL14, /* 11 */ + R_PPC_REL14_BRTAKEN, /* 12 */ + R_PPC_REL14_BRNTAKEN, /* 13 */ + R_PPC_GOT16, /* 14 */ + R_PPC_GOT16_LO, /* 15 */ + R_PPC_GOT16_HI, /* 16 */ + R_PPC_GOT16_HA, /* 17 */ + R_PPC_PLT24, /* 18 */ + R_PPC_COPY, /* 19 */ + R_PPC_GLOB_DAT, /* 20 -- not in final System V spec */ + R_PPC_JMP_SLOT, /* 21 */ + R_PPC_RELATIVE, /* 22 */ + R_PPC_LOCAL24PC, /* 23 */ + R_PPC_UADDR32, /* 24 */ + R_PPC_UADDR16, /* 25 */ + R_PPC_REL32, /* 26 */ + R_PPC_PLT32, /* 27 */ + R_PPC_PLTREL32, /* 28 */ + R_PPC_PLT16_LO, /* 29 */ + R_PPC_PLT16_HI, /* 30 */ + R_PPC_PLT16_HA, /* 31 */ + R_PPC_SDAREL, /* 32 */ + + /* Relocations added by Sun. */ + R_PPC_SECTOFF, /* 33 */ + R_PPC_SECTOFF_LO, /* 34 */ + R_PPC_SECTOFF_HI, /* 35 */ + R_PPC_SECTOFF_HA, /* 36 */ + + /* The remaining relocs are from the Embedded ELF ABI, and are not + in the SVR4 ELF ABI. */ + R_PPC_EMB_NADDR32 = 101, /* 101 */ + R_PPC_EMB_NADDR16, /* 102 */ + R_PPC_EMB_NADDR16_LO, /* 103 */ + R_PPC_EMB_NADDR16_HI, /* 104 */ + R_PPC_EMB_NADDR16_HA, /* 105 */ + R_PPC_EMB_SDAI16, /* 106 */ + R_PPC_EMB_SDA2I16, /* 107 */ + R_PPC_EMB_SDA2REL, /* 108 */ + R_PPC_EMB_SDA21, /* 109 */ + R_PPC_EMB_MRKREF, /* 110 */ + R_PPC_EMB_RELSEC16, /* 111 */ + R_PPC_EMB_RELST_LO, /* 112 */ + R_PPC_EMB_RELST_HI, /* 113 */ + R_PPC_EMB_RELST_HA, /* 114 */ + R_PPC_EMB_BIT_FLD, /* 115 */ + R_PPC_EMB_RELSDA, /* 116 */ + R_PPC_max +}; + +static reloc_howto_type elf_powerpc_howto_table[] = +{ + /* This reloc does nothing. */ + HOWTO (R_PPC_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_NONE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A standard 32 bit relocation. */ + HOWTO (R_PPC_ADDR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR32", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* An absolute 26 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC_ADDR24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR24", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* A standard 16 bit relocation. */ + HOWTO (R_PPC_ADDR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 16 bit relocation without overflow. */ + HOWTO (R_PPC_ADDR16_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The high order 16 bits of an address. */ + HOWTO (R_PPC_ADDR16_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The high order 16 bits of an address, plus 1 if the contents of + the low 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC_ADDR16_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_addr16_ha_reloc, /* special_function */ + "R_PPC_ADDR16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* An absolute 16 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC_ADDR14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_ADDR14", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which 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_ADDR14_BRTAKEN, /* type */ + 0, /* rightshift */ + 2, /* 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_ADDR14_BRTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which 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_ADDR14_BRNTAKEN, /* type */ + 0, /* rightshift */ + 2, /* 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_ADDR14_BRNTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* A relative 26 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC_REL24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_REL24", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0x3fffffc, /* dst_mask */ + true), /* pcrel_offset */ + + /* A relative 16 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC_REL14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "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 */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc_elf_unsupported_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 */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc_elf_unsupported_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_bitfield, /* 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_PLT24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC_PLT24", /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_SDAREL, /* type */ + 0, /* rightshift */ + 2, /* 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_SDAREL", /* 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 */ +}; + +/* 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; +{ + abort (); +} + +/* Handle the ADDR16_HA reloc by adjusting the reloc addend. */ + +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; + + if (output_bfd != (bfd *) NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += (symbol->section->output_section->vma + + symbol->section->output_offset + + reloc_entry->addend); + + if ((relocation & 0x8000) != 0) + reloc_entry->addend += 0x10000; + + return bfd_reloc_continue; +} + +/* 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. */ + +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; +{ + asection *sec; + + if (output_bfd != (bfd *) NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + sec = bfd_get_section (*reloc_entry->sym_ptr_ptr); + 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); + reloc_entry->addend -= sec->output_section->vma; + return bfd_reloc_continue; +} + +/* Map BFD reloc types to PowerPC ELF reloc types. */ + +struct powerpc_reloc_map +{ + unsigned char bfd_reloc_val; + unsigned char elf_reloc_val; +}; + +static const struct powerpc_reloc_map powerpc_reloc_map[] = +{ + { BFD_RELOC_NONE, R_PPC_NONE, }, + { BFD_RELOC_32, R_PPC_ADDR32 }, + { BFD_RELOC_32_PCREL, R_PPC_REL32 }, + { BFD_RELOC_CTOR, R_PPC_ADDR32 }, + { BFD_RELOC_PPC_B26, R_PPC_REL24 }, + { BFD_RELOC_PPC_BA26, R_PPC_ADDR24 }, + { BFD_RELOC_PPC_TOC16, R_PPC_GOT16 }, + { BFD_RELOC_LO16, R_PPC_ADDR16_LO }, + { BFD_RELOC_HI16, R_PPC_ADDR16_HI }, + { BFD_RELOC_HI16_S, R_PPC_ADDR16_HA } +}; + +static reloc_howto_type * +bfd_elf32_bfd_reloc_type_lookup (abfd, code) + bfd *abfd; + bfd_reloc_code_real_type code; +{ + int i; + + for (i = 0; + i < sizeof (powerpc_reloc_map) / sizeof (struct powerpc_reloc_map); + i++) + { + if (powerpc_reloc_map[i].bfd_reloc_val == code) + return &elf_powerpc_howto_table[powerpc_reloc_map[i].elf_reloc_val]; + } + + return NULL; +} + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +powerpc_info_to_howto (abfd, cache_ptr, dst) + bfd *abfd; + arelent *cache_ptr; + Elf32_Internal_Rela *dst; +{ + BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); + cache_ptr->howto = &elf_powerpc_howto_table[ELF32_R_TYPE (dst->r_info)]; +} + +#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 powerpc_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 + +#include "elf32-target.h" |