diff options
Diffstat (limited to 'bfd/elf64-ppc.c')
| -rw-r--r-- | bfd/elf64-ppc.c | 3768 |
1 files changed, 3768 insertions, 0 deletions
diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c new file mode 100644 index 0000000..3a98bc1 --- /dev/null +++ b/bfd/elf64-ppc.c @@ -0,0 +1,3768 @@ +/* PowerPC64-specific support for 64-bit ELF. + Copyright 1999, 2000, 2001 Free Software Foundation, Inc. + Written by Linus Nordberg, Swox AB <info@swox.com>, + based on elf32-ppc.c by Ian Lance Taylor. + +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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* This file is based on the 64-bit PowerPC ELF ABI. It is also based + on the file elf32-ppc.c. */ + +#include "bfd.h" +#include "sysdep.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/ppc.h" + +#define USE_RELA /* we want RELA relocations, not REL. */ + + +static void ppc_howto_init + PARAMS ((void)); +static reloc_howto_type *ppc64_elf_reloc_type_lookup + PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); +static void ppc64_elf_info_to_howto + PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst)); +static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static boolean ppc64_elf_set_private_flags + PARAMS ((bfd *, flagword)); +static boolean ppc64_elf_copy_private_bfd_data + PARAMS ((bfd *, bfd *)); +static boolean ppc64_elf_merge_private_bfd_data + PARAMS ((bfd *, bfd *)); +static boolean ppc64_elf_section_from_shdr + PARAMS ((bfd *, Elf64_Internal_Shdr *, char *)); +static boolean ppc64_elf_create_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean ppc64_elf_check_relocs + PARAMS ((bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); +static asection * ppc64_elf_gc_mark_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); +static boolean ppc64_elf_gc_sweep_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec, + const Elf_Internal_Rela *relocs)); +static boolean ppc64_elf_adjust_dynamic_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +static boolean ppc_adjust_dynindx + PARAMS ((struct elf_link_hash_entry *, PTR)); +static boolean ppc64_elf_size_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean ppc64_elf_final_link + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean ppc64_elf_fake_sections + PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *)); +static boolean ppc64_elf_relocate_section + PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, + Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, + asection **)); +static boolean ppc64_elf_finish_dynamic_symbol + PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); +static boolean ppc64_elf_finish_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + + +/* Branch prediction bit for branch taken relocs. */ +#define BRANCH_PREDICT_BIT 0x200000 + +/* Mask to set RA in memory instructions. */ +#define RA_REGISTER_MASK 0x001f0000 + +/* Value to shift register by to insert RA. */ +#define RA_REGISTER_SHIFT 16 + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" + +/* The size in bytes of an entry in the procedure linkage table. */ +#define PLT_ENTRY_SIZE 24 + +/* The initial size of the plt reserved for the dynamic linker. */ +#define PLT_INITIAL_ENTRY_SIZE 96 + +/* TOC base pointers offset from start of TOC. */ +#define TOC_BASE_OFF (0x8000) + +/* Global linkage stub. The first instruction has its offset patched. */ +/* FIXME: Need traceback table? */ +static const unsigned int ppc64_elf_glink_code[] = { + 0xe9820000, /* ld %r12,0(%r2) */ + 0xf8410028, /* std %r2,40(%r1) */ + 0xe80c0000, /* ld %r0,0(%r12) */ + 0xe84c0008, /* ld %r2,8(%r12) */ + 0x7c0903a6, /* mtctr %r0 */ + 0x4e800420 /* bctr */ +}; + +#define PPC64_ELF_GLINK_SIZE \ + ((sizeof ppc64_elf_glink_code / sizeof ppc64_elf_glink_code[0]) * 4) + +/* Relocation HOWTO's. */ +static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max]; + +static reloc_howto_type ppc64_elf_howto_raw[] = { + /* This reloc does nothing. */ + HOWTO (R_PPC64_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_PPC64_NONE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A standard 32 bit relocation. */ + HOWTO (R_PPC64_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_PPC64_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_PPC64_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_PPC64_ADDR24", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* A standard 16 bit relocation. */ + HOWTO (R_PPC64_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_PPC64_ADDR16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 16 bit relocation without overflow. */ + HOWTO (R_PPC64_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_PPC64_ADDR16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Bits 16-31 of an address. */ + HOWTO (R_PPC64_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_PPC64_ADDR16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Bits 16-31 of an address, plus 1 if the contents of the low 16 + bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_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_PPC64_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_PPC64_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_PPC64_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_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_PPC64_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_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_PPC64_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_PPC64_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_PPC64_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_PPC64_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_PPC64_REL14_BRTAKEN, /* 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_PPC64_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_PPC64_REL14_BRNTAKEN, /* 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_PPC64_REL14_BRNTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + true), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the + symbol. */ + HOWTO (R_PPC64_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_GOT16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_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_PPC64_GOT16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_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_PPC64_GOT16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_GOT16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* 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, because the object being + run has to have the data at some particular address. */ + HOWTO (R_PPC64_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_PPC64_COPY", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR64, but used when setting global offset table + entries. */ + HOWTO (R_PPC64_GLOB_DAT, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_GLOB_DAT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Created by the link editor. Marks a procedure linkage table + entry for a symbol. */ + HOWTO (R_PPC64_JMP_SLOT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_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 + doubleword64 is set to the load address of the object, plus the + addend. */ + HOWTO (R_PPC64_RELATIVE, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_RELATIVE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR32, but may be unaligned. */ + HOWTO (R_PPC64_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_PPC64_UADDR32", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but may be unaligned. */ + HOWTO (R_PPC64_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_PPC64_UADDR16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32-bit PC relative. */ + HOWTO (R_PPC64_REL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + /* FIXME: Verify. Was complain_overflow_bitfield. */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL32", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + true), /* pcrel_offset */ + + /* 32-bit relocation to the symbol's procedure linkage table. + FIXME: R_PPC64_PLT32 not supported. */ + HOWTO (R_PPC64_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_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. + FIXME: R_PPC64_PLTREL32 not supported. */ + HOWTO (R_PPC64_PLTREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTREL32", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_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_PPC64_PLT16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_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_PPC64_PLT16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_PLT16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32-bit section relative relocation. */ + /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and + dst_mask=0. */ + HOWTO (R_PPC64_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_SECTOFF", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* 16-bit lower half section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_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_PPC64_SECTOFF_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16-bit upper half section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_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_PPC64_SECTOFF_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16-bit upper half adjusted section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_SECTOFF_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_REL24 without touching the two least significant + bits. */ + /* FIXME: Verify R_PPC64_ADDR30. */ + HOWTO (R_PPC64_ADDR30, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 30, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR30", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffffffc, /* dst_mask */ + true), /* pcrel_offset */ + + /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ + + /* A standard 64-bit relocation. */ + HOWTO (R_PPC64_ADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The bits 32-47 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ + 32, /* 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_PPC64_ADDR16_HIGHER", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The bits 32-47 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHERA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The bits 48-63 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ + 48, /* 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_PPC64_ADDR16_HIGHEST", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* The bits 48-63 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHESTA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like ADDR64, but may be unaligned. */ + HOWTO (R_PPC64_UADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 64-bit relative relocation. */ + HOWTO (R_PPC64_REL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + true), /* pcrel_offset */ + + /* 64-bit relocation to the symbol's procedure linkage table. */ + /* FIXME: R_PPC64_PLT64 not supported. */ + HOWTO (R_PPC64_PLT64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLT64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* 64-bit PC relative relocation to the symbol's procedure linkage + table. */ + /* FIXME: R_PPC64_PLTREL64 not supported. */ + HOWTO (R_PPC64_PLTREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTREL64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation. */ + + /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ + HOWTO (R_PPC64_TOC16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TOC16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation without overflow. */ + + /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_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_PPC64_TOC16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits. */ + + /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_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_PPC64_TOC16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the + contents of the low 16 bits, treated as a signed number, is + negative. */ + + /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_TOC16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 64-bit relocation; insert value of TOC base (.TOC.). */ + + /* R_PPC64_TOC 51 doubleword64 .TOC. */ + HOWTO (R_PPC64_TOC, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TOC", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but also informs the link editor that the + value to relocate may (!) refer to a PLT entry which the link + editor (a) may replace with the symbol value. If the link editor + is unable to fully resolve the symbol, it may (b) create a PLT + entry and store the address to the new PLT entry in the GOT. + This permits lazy resolution of function symbols at run time. + The link editor may also skip all of this and just (c) emit a + R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ + /* FIXME: R_PPC64_PLTGOT16 not implemented. */ + HOWTO (R_PPC64_PLTGOT16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTGOT16", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but without overflow. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_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_PPC64_PLTGOT16_LO", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ + /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ + HOWTO (R_PPC64_PLTGOT16_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_PPC64_PLTGOT16_HI", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus + 1 if the contents of the low 16 bits, treated as a signed number, + is negative. */ + /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ + HOWTO (R_PPC64_PLTGOT16_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 */ + ppc64_elf_addr16_ha_reloc, /* special_function */ + "R_PPC64_PLTGOT16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_DS, /* 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_PPC64_ADDR16_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_LO_DS, /* 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_PPC64_ADDR16_LO_DS",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_GOT16_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_LO_DS, /* 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_PPC64_GOT16_LO_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_PLT16_LO_DS, /* 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_PPC64_PLT16_LO_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ + /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and + dst_mask=0. */ + HOWTO (R_PPC64_SECTOFF_DS, /* 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_PPC64_SECTOFF_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_SECTOFF_LO_DS, /* 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_PPC64_SECTOFF_LO_DS",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_TOC16, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TOC16_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_LO_DS, /* 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_PPC64_TOC16_LO_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ + HOWTO (R_PPC64_PLTGOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTGOT16_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_LO_DS,/* 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_PPC64_PLTGOT16_LO_DS",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTINHERIT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_PPC64_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTENTRY", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ +}; + + +/* Initialize the ppc64_elf_howto_table, so that linear accesses can + be done. */ + +static void +ppc_howto_init () +{ + unsigned int i, type; + + for (i = 0; + i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); + i++) + { + type = ppc64_elf_howto_raw[i].type; + BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) + / sizeof (ppc64_elf_howto_table[0]))); + ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; + } +} + +static reloc_howto_type * +ppc64_elf_reloc_type_lookup (abfd, code) + bfd *abfd ATTRIBUTE_UNUSED; + bfd_reloc_code_real_type code; +{ + enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; + + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + switch ((int) code) + { + default: + return (reloc_howto_type *) NULL; + + case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE; + break; + case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32; + break; + case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24; + break; + case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16; + break; + case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO; + break; + case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI; + break; + case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA; + break; + case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14; + break; + case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN; + break; + case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN; + break; + case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24; + break; + case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14; + break; + case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN; + break; + case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN; + break; + case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16; + break; + case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO; + break; + case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI; + break; + case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA; + break; + case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY; + break; + case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT; + break; + case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32; + break; + case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32; + break; + case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32; + break; + case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO; + break; + case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI; + break; + case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA; + break; + case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC64_SECTOFF; + break; + case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO; + break; + case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI; + break; + case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA; + break; + /* FIXME: Is CTOR 32 or 64 bits? Fix md_apply_fix3 in + gas/config/tc-ppc.c too. */ + case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR32; + break; + case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64; + break; + case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER; + break; + case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA; + break; + case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST; + break; + case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA; + break; + case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64; + break; + case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64; + break; + case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64; + break; + case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16; + break; + case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO; + break; + case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI; + break; + case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA; + break; + case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC; + break; + case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO; + break; + case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI; + break; + case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA; + break; + case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS; + break; + case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS; + break; + case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS; + break; + case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS; + break; + case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS; + break; + case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS; + break; + case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS; + break; + case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT; + break; + case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY; + break; + } + + return ppc64_elf_howto_table[(int) ppc_reloc]; +}; + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +ppc64_elf_info_to_howto (abfd, cache_ptr, dst) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *cache_ptr; + Elf64_Internal_Rela *dst; +{ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + BFD_ASSERT (ELF64_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); + cache_ptr->howto = ppc64_elf_howto_table[ELF64_R_TYPE (dst->r_info)]; +} + +/* Handle the R_PPC_ADDR16_HA reloc. */ + +static bfd_reloc_status_type +ppc64_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + bfd_vma relocation; + + if (output_bfd != NULL) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (reloc_entry->address > input_section->_cooked_size) + return bfd_reloc_outofrange; + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + + reloc_entry->addend += (relocation & 0x8000) << 1; + + return bfd_reloc_continue; +} + +/* Function to set whether a module needs the -mrelocatable bit set. */ + +static boolean +ppc64_elf_set_private_flags (abfd, flags) + bfd *abfd; + flagword flags; +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); + + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = true; + return true; +} + +/* Copy backend specific data from one object module to another. */ +static boolean +ppc64_elf_copy_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return true; + + BFD_ASSERT (!elf_flags_init (obfd) + || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); + + elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; + elf_flags_init (obfd) = true; + return true; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ +static boolean +ppc64_elf_merge_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + flagword old_flags; + flagword new_flags; + boolean error; + + /* Check if we have the same endianess. */ + if (ibfd->xvec->byteorder != obfd->xvec->byteorder + && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) + { + const char *msg; + + if (bfd_big_endian (ibfd)) + msg = _("%s: compiled for a big endian system and target is little endian"); + else + msg = _("%s: compiled for a little endian system and target is big endian"); + + (*_bfd_error_handler) (msg, bfd_get_filename (ibfd)); + + bfd_set_error (bfd_error_wrong_format); + return false; + } + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || 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_flags_init (obfd)) + { + /* First call, no flags set. */ + elf_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. */ + error = false; + if ((new_flags & EF_PPC_RELOCATABLE) != 0 + && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) + { + error = true; + (*_bfd_error_handler) + (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), + bfd_get_filename (ibfd)); + } + else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 + && (old_flags & EF_PPC_RELOCATABLE) != 0) + { + error = true; + (*_bfd_error_handler) + (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), + bfd_get_filename (ibfd)); + } + + /* The output is -mrelocatable-lib iff both the input files are. */ + if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) + elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; + + /* The output is -mrelocatable iff it can't be -mrelocatable-lib, + but each input file is either -mrelocatable or -mrelocatable-lib. */ + if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) + && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) + && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) + elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; + + /* Do not warn about eabi vs. V.4 mismatch, just or in the bit + if any module uses it. */ + elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); + + new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + + /* Warn about any other mismatches. */ + if (new_flags != old_flags) + { + error = true; + (*_bfd_error_handler) + (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), + bfd_get_filename (ibfd), (long) new_flags, (long) old_flags); + } + + if (error) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + } + + return true; +} + +/* Handle a PowerPC specific section when reading an object file. This + is called when elfcode.h finds a section with an unknown type. */ + +static boolean +ppc64_elf_section_from_shdr (abfd, hdr, name) + bfd *abfd; + Elf64_Internal_Shdr *hdr; + char *name; +{ + asection *newsect; + flagword flags; + + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) + return false; + + newsect = hdr->bfd_section; + flags = bfd_get_section_flags (abfd, newsect); + if (hdr->sh_flags & SHF_EXCLUDE) + flags |= SEC_EXCLUDE; + + if (hdr->sh_type == SHT_ORDERED) + flags |= SEC_SORT_ENTRIES; + + bfd_set_section_flags (abfd, newsect, flags); + return true; +} + +/* The following routines are specific to the ELF linker, while + routines above are used generally. They appear in this file more + or less in the order in which they are called from external + routines. eg. ppc64_elf_check_relocs is called early in the link + process, ppc64_elf_finish_dynamic_sections is one of the last + functions called. */ + +/* Create the .glink section as well as the ordinary dynamic + sections. */ + +static boolean +ppc64_elf_create_dynamic_sections (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + asection *s; + flagword flags; + + if (!_bfd_elf_create_dynamic_sections (abfd, info)) + return false; + + /* Our .plt just contains pointers, no code. */ + s = bfd_get_section_by_name (abfd, ".plt"); + if (s == NULL) + return false; + flags = bfd_get_section_flags (abfd, s); + flags &= ~SEC_CODE; + if (! bfd_set_section_flags (abfd, s, flags)) + return false; + + /* Create .glink for global linkage functions. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + s = bfd_make_section (abfd, ".glink"); + if (s == NULL + || ! bfd_set_section_flags (abfd, s, flags) + || ! bfd_set_section_alignment (abfd, s, 3)) + return false; + + return true; +} + +/* Look through the relocs for a section during the first phase, and + allocate space in the global offset table or procedure linkage + table. */ + +static boolean +ppc64_elf_check_relocs (abfd, info, sec, relocs) + bfd *abfd; + struct bfd_link_info *info; + asection *sec; + const Elf_Internal_Rela *relocs; +{ + bfd *dynobj; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + bfd_signed_vma *local_got_refcounts; + asection *sreloc; + asection *sgot = NULL; + asection *srelgot = NULL; + + if (info->relocateable) + return true; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_check_relocs called for section %s in %s\n", + bfd_get_section_name (abfd, sec), + bfd_get_filename (abfd)); +#endif + + dynobj = elf_hash_table (info)->dynobj; + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + local_got_refcounts = elf_local_got_refcounts (abfd); + + sym_hashes = elf_sym_hashes (abfd); + sym_hashes_end = (sym_hashes + + symtab_hdr->sh_size / sizeof (Elf64_External_Sym)); + if (!elf_bad_symtab (abfd)) + sym_hashes_end -= symtab_hdr->sh_info; + + sreloc = NULL; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + switch (ELF64_R_TYPE (rel->r_info)) + { + /* GOT16 relocations */ + case R_PPC64_GOT16: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_LO_DS: + /* This symbol requires a global offset table entry. */ + + if (sgot == NULL) + { + if (dynobj == NULL) + elf_hash_table (info)->dynobj = dynobj = abfd; + if (! _bfd_elf_create_got_section (dynobj, info)) + return false; + sgot = bfd_get_section_by_name (dynobj, ".got"); + BFD_ASSERT (sgot != NULL); + } + + if (srelgot == NULL + && (h != NULL || info->shared)) + { + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + if (srelgot == NULL) + { + srelgot = bfd_make_section (dynobj, ".rela.got"); + if (srelgot == NULL + || ! bfd_set_section_flags (dynobj, srelgot, + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)) + || ! bfd_set_section_alignment (dynobj, srelgot, 2)) + return false; + } + } + + if (h != NULL) + { + if (h->got.refcount == -1) + { + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1) + if (!bfd_elf64_link_record_dynamic_symbol (info, h)) + return false; + + /* Allocate space in the .got. */ + sgot->_raw_size += 8; + /* Allocate relocation space. */ + srelgot->_raw_size += sizeof (Elf64_External_Rela); + + h->got.refcount = 1; + } + else + h->got.refcount++; + } + else + { + /* This is a global offset table entry for a local symbol. */ + if (local_got_refcounts == NULL) + { + size_t size; + + size = symtab_hdr->sh_info * sizeof (bfd_signed_vma); + local_got_refcounts = (bfd_signed_vma *) + bfd_alloc (abfd, size); + if (local_got_refcounts == NULL) + return false; + elf_local_got_refcounts (abfd) = local_got_refcounts; + memset (local_got_refcounts, -1, size); + } + if (local_got_refcounts[r_symndx] == -1) + { + sgot->_raw_size += 8; + + /* If we are generating a shared object, we need to + output a R_PPC64_RELATIVE reloc so that the + dynamic linker can adjust this GOT entry. */ + if (info->shared) + srelgot->_raw_size += sizeof (Elf64_External_Rela); + + local_got_refcounts[r_symndx] = 1; + } + else + local_got_refcounts[r_symndx]++; + } + break; + + case R_PPC64_PLT64: + case R_PPC64_PLT32: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_HA: + case R_PPC64_PLTGOT16_DS: + case R_PPC64_PLTGOT16_LO_DS: +#ifdef DEBUG + fprintf (stderr, "Reloc requires a PLT entry\n"); +#endif + /* This symbol requires a procedure linkage table entry. We + actually build the entry in adjust_dynamic_symbol, + because this might be a case of linking PIC code without + linking in any dynamic objects, in which case we don't + need to generate a procedure linkage table after all. */ + + if (h == NULL) + { + /* It does not make sense to have a procedure linkage + table entry for a local symbol. */ + bfd_set_error (bfd_error_bad_value); + return false; + } + + /* Make sure this symbol is output as a dynamic symbol. */ + if (h->dynindx == -1) + { + if (! bfd_elf64_link_record_dynamic_symbol (info, h)) + return false; + } + if (h->plt.refcount == -1) + { + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount = 1; + } + else + h->plt.refcount++; + break; + + /* The following relocations don't need to propagate the + relocation if linking a shared object since they are + section relative. */ + case R_PPC64_SECTOFF: + case R_PPC64_SECTOFF_LO: + case R_PPC64_SECTOFF_HI: + case R_PPC64_SECTOFF_HA: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_PPC64_GNU_VTINHERIT: + if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return false; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_PPC64_GNU_VTENTRY: + if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return false; + break; + + /* When creating a shared object, we must copy these + relocs into the output file. We create a reloc + section in dynobj and make room for the reloc. */ + case R_PPC64_REL64: + case R_PPC64_REL32: + case R_PPC64_REL24: + case R_PPC64_REL14: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL14_BRNTAKEN: + if (h == NULL) + break; + /* fall through */ + + case R_PPC64_TOC: + /* fall through */ + + default: + if (info->shared) + { +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_check_relocs need to create relocation for %s\n", + (h && h->root.root.string + ? h->root.root.string + : "<unknown>")); +#endif + if (sreloc == NULL) + { + const char *name; + + name = (bfd_elf_string_from_elf_section + (abfd, + elf_elfheader (abfd)->e_shstrndx, + elf_section_data (sec)->rel_hdr.sh_name)); + if (name == NULL) + return false; + + BFD_ASSERT (strncmp (name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (abfd, sec), + name + 5) == 0); + + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + flagword flags; + + sreloc = bfd_make_section (dynobj, name); + flags = (SEC_HAS_CONTENTS | SEC_READONLY + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + if ((sec->flags & SEC_ALLOC) != 0) + flags |= SEC_ALLOC | SEC_LOAD; + if (sreloc == NULL + || ! bfd_set_section_flags (dynobj, sreloc, flags) + || ! bfd_set_section_alignment (dynobj, sreloc, 2)) + return false; + } + } + + sreloc->_raw_size += sizeof (Elf64_External_Rela); + + /* FIXME: We should here do what the m68k and i386 + backends do: if the reloc is pc-relative, record it + in case it turns out that the reloc is unnecessary + because the symbol is forced local by versioning or + we are linking with -Bdynamic. Fortunately this + case is not frequent. */ + } + + break; + } + } + + return true; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym) + bfd *abfd; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + Elf_Internal_Rela *rel; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; +{ + if (h != NULL) + { + switch (ELF64_R_TYPE (rel->r_info)) + { + case R_PPC64_GNU_VTINHERIT: + case R_PPC64_GNU_VTENTRY: + break; + + default: + switch (h->root.type) + { + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + return h->root.u.def.section; + + case bfd_link_hash_common: + return h->root.u.c.p->section; + + default: + break; + } + } + } + else + { + if (! (elf_bad_symtab (abfd) + && ELF_ST_BIND (sym->st_info) != STB_LOCAL) + && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) + && sym->st_shndx != SHN_COMMON)) + { + return bfd_section_from_elf_index (abfd, sym->st_shndx); + } + } + + return NULL; +} + +/* Update the got entry reference counts for the section being removed. */ + +static boolean +ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) + bfd *abfd; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + asection *sec; + const Elf_Internal_Rela *relocs; +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + switch (ELF64_R_TYPE (rel->r_info)) + { + case R_PPC64_GOT16: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_HA: + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->got.refcount > 0) + h->got.refcount--; + } + else + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; + + case R_PPC64_PLT32: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_HA: + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->plt.refcount > 0) + h->plt.refcount--; + } + break; + + default: + break; + } + + return true; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static boolean +ppc64_elf_adjust_dynamic_symbol (info, h) + struct bfd_link_info *info; + struct elf_link_hash_entry *h; +{ + bfd *dynobj = elf_hash_table (info)->dynobj; + asection *s; + unsigned int power_of_two; + bfd_vma plt_offset; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_adjust_dynamic_symbol called for %s\n", + h->root.root.string); +#endif + + /* Make sure we know what is going on here. */ + BFD_ASSERT (dynobj != NULL + && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || h->weakdef != NULL + || ((h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_REF_REGULAR) != 0 + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0))); + + /* If this is a function, alter the symbol to refer to global + linkage code, which will be generated by ppc64_elf_relocate_section. + Also, allocate a slot in the PLT. */ + if (h->type == STT_FUNC + || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + asection *splt, *sglink; + + if (! elf_hash_table (info)->dynamic_sections_created + || ((!info->shared || info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) != 0)) + { + /* A PLT entry is not required/allowed when: + + 1. We are not using ld.so; because then the PLT entry + can't be set up, so we can't use one. + + 2. We know for certain that a symbol is defined in + this object, because this object is the application, + is linked with -Bsymbolic, or because the symbol is local. + + We used to end up here for GC if + (info->shared && h->plt.refcount <= 0) + We can't use plt.refcount here since + ppc64_elf_check_relocs can't detect all needs for + PLT. FIXME: Rewrite GC. */ + + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + return true; + } + + splt = bfd_get_section_by_name (dynobj, ".plt"); + sglink = bfd_get_section_by_name (dynobj, ".glink"); + BFD_ASSERT (splt != NULL && sglink != NULL); + + /* If it's a function entry point (the name starts with a dot) + (FIXME: Could it ever be anything else?), find its + corresponding function descriptor symbol and make sure it's + output as a dynamic symbol. Create it as undefined if + necessary. ppc64_elf_finish_dynamic_symbol will look it up + again and create a JMP_SLOT reloc for it. FIXME: The second + lookup could be avoided by adding a new flag to + elf_link_hash_entry->elf_link_hash_flags. */ + + if (h->root.root.string[0] == '.') + { + struct elf_link_hash_entry *fdh; + + /* FIXME: Follow bfd_link_hash_indirect? */ + fdh = elf_link_hash_lookup (elf_hash_table (info), + h->root.root.string + 1, + false, false, false); + + if (fdh == (struct elf_link_hash_entry *) NULL) + { + asymbol *newsym; + + /* Create it as undefined. */ + newsym = bfd_make_empty_symbol (dynobj); + BFD_ASSERT (newsym != NULL); + /* FIXME: Need own copy of name? */ + newsym->name = h->root.root.string + 1; + newsym->section = bfd_und_section_ptr; + newsym->value = 0; + newsym->flags = BSF_DYNAMIC | BSF_OBJECT; + + if ( ! (_bfd_generic_link_add_one_symbol + (info, dynobj, newsym->name, newsym->flags, + newsym->section, newsym->value, + NULL, /* string */ + true, /* copy */ + false, /*collect*/ + (struct bfd_link_hash_entry **) &fdh))) + { + /* FIXME: Print error message. */ + return false; + } + fdh->root.type = bfd_link_hash_undefined; +#ifdef DEBUG + fprintf (stderr, "\tcreated %s", newsym->name); +#endif + } +#ifdef DEBUG + else + fprintf (stderr, "\tfound %s", fdh->root.root.string); + fprintf (stderr, "\n"); +#endif + + BFD_ASSERT (fdh != NULL); + + /* Make sure it's output as a dynamic symbol. */ + if (fdh->dynindx == -1) + { + if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) + return false; + } + BFD_ASSERT (fdh->dynindx != -1); + } + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (splt->_raw_size == 0) + splt->_raw_size = PLT_INITIAL_ENTRY_SIZE; + + plt_offset = splt->_raw_size; + + /* FIXME: What about function pointer comparisons in 64-bit PPC? + We can't use the same trick as 32-bit PPC, since we set the + symbol to the linkage function. This will make function entry + point comparison work as expected within one object, but not + across object boundaries. From the ABI: + + In this ABI, the address of a function is actually the address of a + function descriptor. A reference to a function, other than a function + call, will normally load the address of the function descriptor from + the global offset table. The dynamic linker will ensure that for a + given function, the same address is used for all references to the + function from any global offset table. Thus, function address + comparisons will work as expected. + + When making a call to the function, the code may refer to the + procedure linkage table entry, in order to permit lazy symbol + resolution at run time. In order to support correct function address + comparisons, the compiler should be careful to only generate + references to the procedure linkage table entry for function calls. + For any other use of a function, the compiler should use the real + address. + + I don't see how this could ever work when passing a pointer to + a function across an object boundary. The compiler has no + way of knowing how to find the function descriptor for a + function whose entrypoint is taken as an argument. + + Or should the compiler arrange so that the function descriptor + address is passed and make the callee dig out the entry point + from that? */ +#if 0 + /* If this symbol is not defined in a regular file, and we are + not generating a shared library, then set the symbol to this + location in the .plt. This is required to make function + pointers compare as equal between the normal executable and + the shared library. */ + if (! info->shared + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + h->root.u.def.section = splt; + h->root.u.def.value = plt_offset; + } +#endif + + /* FIXME: How should a linkage symbol be defined? It shouldn't + be global, since it can't be used by any other object than + this one. Set ELF_LINK_FORCED_LOCAL? */ + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = sglink; + h->root.u.def.value = sglink->_raw_size; + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.offset = plt_offset; + + /* Make room for global linkage code in .glink. */ + sglink->_raw_size += PPC64_ELF_GLINK_SIZE; + + /* Make room for this entry in PLT. */ + splt->_raw_size += PLT_ENTRY_SIZE; + + /* We also need to make an entry in the .rela.plt section. */ + s = bfd_get_section_by_name (dynobj, ".rela.plt"); + BFD_ASSERT (s != NULL); + s->_raw_size += sizeof (Elf64_External_Rela); + + return true; + } + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->weakdef != NULL) + { + BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined + || h->weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->weakdef->root.u.def.section; + h->root.u.def.value = h->weakdef->root.u.def.value; + return true; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + /* If we are creating a shared library, we must presume that the + only references to the symbol are via the global offset table. + For such cases we need not do anything here; the relocations will + be handled correctly by relocate_section. */ + if (info->shared) + return true; + + /* We must allocate the symbol in our .dynbss section, which will + become part of the .bss section of the executable. There will be + an entry for this symbol in the .dynsym section. The dynamic + object will contain position independent code, so all references + from the dynamic object to this symbol will go through the global + offset table. The dynamic linker will use the .dynsym entry to + determine the address it must put in the global offset table, so + both the dynamic object and the regular object will refer to the + same memory location for the variable. */ + s = bfd_get_section_by_name (dynobj, ".dynbss"); + BFD_ASSERT (s != NULL); + + /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to + copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) + { + asection *srel; + + srel = bfd_get_section_by_name (dynobj, ".rela.bss"); + BFD_ASSERT (srel != NULL); + srel->_raw_size += sizeof (Elf64_External_Rela); + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; + } + + /* We need to figure out the alignment required for this symbol. I + have no idea how ELF linkers handle this. */ + power_of_two = bfd_log2 (h->size); + if (power_of_two > 4) + power_of_two = 4; + + /* Apply the required alignment. */ + s->_raw_size = BFD_ALIGN (s->_raw_size, + (bfd_size_type) (1 << power_of_two)); + if (power_of_two > bfd_get_section_alignment (dynobj, s)) + { + if (! bfd_set_section_alignment (dynobj, s, power_of_two)) + return false; + } + + /* Define the symbol as being at this point in the section. */ + h->root.u.def.section = s; + h->root.u.def.value = s->_raw_size; + + /* Increment the section size to make room for the symbol. */ + s->_raw_size += h->size; + + return true; +} + +/* Increment the index of a dynamic symbol by a given amount. Called + via elf_link_hash_traverse. */ + +static boolean +ppc_adjust_dynindx (h, cparg) + struct elf_link_hash_entry *h; + PTR cparg; +{ + int *cp = (int *) cparg; + +#ifdef DEBUG + fprintf (stderr, + "ppc_adjust_dynindx: h->dynindx = %ld, *cp = %d (%s)\n", + h->dynindx, *cp, + h->root.root.string ? h->root.root.string : "<unknown>"); +#endif + + if (h->dynindx != -1) + h->dynindx += *cp; + + return true; +} + +/* Set the sizes of the dynamic sections. */ + +static boolean +ppc64_elf_size_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *s; + boolean plt; + boolean relocs; + boolean reltext; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_size_dynamic_sections called\n"); +#endif + + dynobj = elf_hash_table (info)->dynobj; + BFD_ASSERT (dynobj != NULL); + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (! info->shared) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } + else + { + /* We may have created entries in the .rela.got section. + However, if we are not creating the dynamic sections, we will + not actually use these entries. Reset the size of .rela.got + which will cause it to get stripped from the output file + below. */ + s = bfd_get_section_by_name (dynobj, ".rela.got"); + if (s != NULL) + s->_raw_size = 0; + } + + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + plt = false; + relocs = false; + reltext = false; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; + boolean strip; + + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + /* It's OK to base decisions on the section name, because none + of the dynobj section names depend upon the input files. */ + name = bfd_get_section_name (dynobj, s); + + strip = false; + + if (strcmp (name, ".plt") == 0) + { + if (s->_raw_size == 0) + { + /* Strip this section if we don't need it; see the + comment below. */ + strip = true; + } + else + { + /* Remember whether there is a PLT. */ + plt = true; + } + } + else if (strncmp (name, ".rela", 5) == 0) + { + if (s->_raw_size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they must be created + before the linker maps input sections to output + sections. The linker does that before + adjust_dynamic_symbol is called, and it is that + function which decides whether anything needs to go + into these sections. */ + strip = true; + } + else + { + asection *target; + const char *outname; + + /* Remember whether there are any relocation sections. */ + relocs = true; + + /* If this relocation section applies to a read only + section, then we probably need a DT_TEXTREL entry. */ + outname = bfd_get_section_name (output_bfd, + s->output_section); + target = bfd_get_section_by_name (output_bfd, outname + 5); + if (target != NULL + && (target->flags & SEC_READONLY) != 0 + && (target->flags & SEC_ALLOC) != 0) + reltext = true; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + } + else if (strcmp (name, ".got") != 0 + && strcmp (name, ".toc") != 0 + && strcmp (name, ".glink") != 0) + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (strip) + { + _bfd_strip_section_from_output (info, s); + continue; + } + +#ifdef DEBUG + fprintf (stderr, "\tallocating %lu bytes for section %s\n", + (unsigned long) s->_raw_size, name); +#endif + + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); + if (s->contents == NULL && s->_raw_size != 0) + return false; + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in ppc64_elf_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ + if (! info->shared) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) + return false; + } + + if (plt) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) + || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0)) + return false; + } + + if (relocs) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) + || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, + sizeof (Elf64_External_Rela))) + return false; + } + + if (reltext) + { + if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) + return false; + } + } + + /* If we are generating a shared library, we generate a section + symbol for each output section. These are local symbols, which + means that they must come first in the dynamic symbol table. + That means we must increment the dynamic symbol index of every + other dynamic symbol. + + FIXME: We assume that there will never be relocations to + locations in linker-created sections that do not have + externally-visible names. Instead, we should work out precisely + which sections relocations are targetted at. */ + if (info->shared) + { + int c; + + for (c = 0, s = output_bfd->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LINKER_CREATED) != 0 + || (s->flags & SEC_ALLOC) == 0) + { + elf_section_data (s)->dynindx = -1; + continue; + } + + /* These symbols will have no names, so we don't need to + fiddle with dynstr_index. */ + + elf_section_data (s)->dynindx = c + 1; + + c++; + } + + elf_link_hash_traverse (elf_hash_table (info), + ppc_adjust_dynindx, + (PTR) &c); + elf_hash_table (info)->dynsymcount += c; + } + + return true; +} + +/* Called after we have seen all the input files/sections, but before + final symbol resolution and section placement has been determined. + + We use this hook to provide a value for TOCstart, which we store in + the output bfd elf_gp, then we call the generic ELF final link + routine. */ + +static boolean +ppc64_elf_final_link (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + if (! info->relocateable) + { + asection *s; + bfd_vma TOCstart; + + /* The TOC consists of sections .got, .toc, .tocbss, .plt in this + order. The TOC starts where the first of these sections starts. */ + s = bfd_get_section_by_name (abfd, ".got"); + if (s == NULL) + s = bfd_get_section_by_name (abfd, ".toc"); + if (s == NULL) + s = bfd_get_section_by_name (abfd, ".tocbss"); + if (s == NULL) + s = bfd_get_section_by_name (abfd, ".plt"); + if (s == NULL) + { + /* This may happen for + o references to TOC base (SYM@toc / TOC[tc0]) without a + .toc directive + o bad linker script + o --gc-sections and empty TOC sections + + FIXME: Warn user? */ + + /* Look for a likely section. We probably won't even be + using TOCstart. */ + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) + break; + if (s == NULL) + for (s = abfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_ALLOC) == SEC_ALLOC) + break; + } + + TOCstart = 0; + if (s != NULL) + TOCstart = s->output_section->vma + s->output_offset; + + elf_gp (abfd) = TOCstart; + } + + /* Invoke the regular gc ELF backend linker to do all the work. */ + return _bfd_elf64_gc_common_final_link (abfd, info); +} + +/* Set up any other section flags and such that may be necessary. */ + +static boolean +ppc64_elf_fake_sections (abfd, shdr, asect) + bfd *abfd ATTRIBUTE_UNUSED; + Elf64_Internal_Shdr *shdr; + asection *asect; +{ + if ((asect->flags & SEC_EXCLUDE) != 0) + shdr->sh_flags |= SHF_EXCLUDE; + + if ((asect->flags & SEC_SORT_ENTRIES) != 0) + shdr->sh_type = SHT_ORDERED; + + return true; +} + +/* 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 +ppc64_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; + struct elf_link_hash_entry **sym_hashes; + bfd *dynobj; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + asection *sreloc; + asection *splt; + asection *sgot; + bfd_vma *local_got_offsets; + bfd_vma TOCstart; + boolean ret = true; + long insn; + +#ifdef DEBUG + fprintf (stderr, "ppc64_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 (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + local_got_offsets = elf_local_got_offsets (input_bfd); + + sreloc = NULL; + splt = NULL; + sgot = NULL; + dynobj = elf_hash_table (info)->dynobj; + if (dynobj != NULL) + { + splt = bfd_get_section_by_name (dynobj, ".plt"); + sgot = bfd_get_section_by_name (dynobj, ".got"); + } + TOCstart = elf_gp (output_bfd); + + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + enum elf_ppc_reloc_type r_type; + bfd_vma offset; + bfd_vma addend; + bfd_reloc_status_type r; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + const char *sym_name; + reloc_howto_type *howto; + unsigned long r_symndx; + bfd_vma relocation; + + r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); + offset = rel->r_offset; + addend = rel->r_addend; + r = bfd_reloc_other; + sym = (Elf_Internal_Sym *) 0; + sec = (asection *) 0; + h = (struct elf_link_hash_entry *) 0; + sym_name = (const char *) 0; + + /* Unknown relocation handling. */ + if ((unsigned) r_type >= (unsigned) R_PPC_max + || !ppc64_elf_howto_table[(int) r_type]) + { + (*_bfd_error_handler) (_("%s: unknown relocation type %d"), + bfd_get_filename (input_bfd), + (int) r_type); + bfd_set_error (bfd_error_bad_value); + ret = false; + continue; + } + + howto = ppc64_elf_howto_table[(int) r_type]; + r_symndx = ELF64_R_SYM (rel->r_info); + + if (info->relocateable) + { + /* This is a relocatable 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. */ + + /* Set `relocation'. */ + if (r_type == R_PPC64_TOC) + { + /* Relocation value is TOC base. Symbol is ignored. */ + relocation = TOCstart + TOC_BASE_OFF; + } + else if (r_symndx < symtab_hdr->sh_info) + { + /* It's a local symbol. */ + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + sym_name = "<local symbol>"; + + relocation = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + } + else + { + /* It's a global symbol. */ + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + sym_name = h->root.root.string; + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + { + sec = h->root.u.def.section; + if ((r_type == R_PPC64_PLT32 + && h->plt.offset != (bfd_vma) -1) + || ((r_type == R_PPC64_GOT16 + || r_type == R_PPC64_GOT16_LO + || r_type == R_PPC64_GOT16_HI + || r_type == R_PPC64_GOT16_HA + || r_type == R_PPC64_GOT16_DS + || r_type == R_PPC64_GOT16_LO_DS) + && elf_hash_table (info)->dynamic_sections_created + && (! info->shared + || (! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + || (info->shared + && ((! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0) + && (input_section->flags & SEC_ALLOC) != 0 + && (r_type == R_PPC64_ADDR64 + || r_type == R_PPC64_ADDR32 + || r_type == R_PPC64_ADDR24 + || r_type == R_PPC64_ADDR16 + || r_type == R_PPC64_ADDR16_LO + || r_type == R_PPC64_ADDR16_DS + || r_type == R_PPC64_ADDR16_LO_DS + || r_type == R_PPC64_ADDR16_HI + || r_type == R_PPC64_ADDR16_HA + || r_type == R_PPC64_ADDR16_HIGHER + || r_type == R_PPC64_ADDR16_HIGHERA + || r_type == R_PPC64_ADDR16_HIGHEST + || r_type == R_PPC64_ADDR16_HIGHESTA + || r_type == R_PPC64_ADDR14 + || r_type == R_PPC64_ADDR14_BRTAKEN + || r_type == R_PPC64_ADDR14_BRNTAKEN + || r_type == R_PPC64_COPY + || r_type == R_PPC64_GLOB_DAT + || r_type == R_PPC64_JMP_SLOT + || r_type == R_PPC64_UADDR64 + || r_type == R_PPC64_UADDR32 + || r_type == R_PPC64_UADDR16))) + { + /* In these cases, we don't need the relocation + value. We check specially because in some + obscure cases sec->output_section will be NULL. */ + relocation = 0; + } + else + 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 && !info->symbolic && !info->no_undefined) + relocation = 0; + else + { + if (! ((*info->callbacks->undefined_symbol) + (info, h->root.root.string, input_bfd, input_section, + rel->r_offset, (!info->shared + || info->no_undefined + || ELF_ST_VISIBILITY (h->other))))) + return false; + relocation = 0; + } + } + + switch ((int) r_type) + { + case (int) R_PPC64_ADDR16_DS: + case (int) R_PPC64_ADDR16_LO_DS: + case (int) R_PPC64_GOT16_DS: + case (int) R_PPC64_GOT16_LO_DS: + case (int) R_PPC64_PLT16_LO_DS: + case (int) R_PPC64_SECTOFF_DS: + case (int) R_PPC64_SECTOFF_LO_DS: + case (int) R_PPC64_TOC16_DS: + case (int) R_PPC64_TOC16_LO_DS: + case (int) R_PPC64_PLTGOT16_DS: + case (int) R_PPC64_PLTGOT16_LO_DS: + if (((relocation + addend) & 3) != 0) + { + (*_bfd_error_handler) (_("%s: error: relocation %s not a multiple of 4"), + bfd_get_filename (input_bfd), + howto->name); + bfd_set_error (bfd_error_bad_value); + ret = false; + continue; + } + } + + /* Set `addend'. */ + switch ((int) r_type) + { + default: + (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"), + bfd_get_filename (input_bfd), + (int) r_type, sym_name); + + bfd_set_error (bfd_error_bad_value); + ret = false; + continue; + + /* Relocations that may need to be propagated if this is a shared + object. */ + case (int) R_PPC64_REL24: + case (int) R_PPC64_ADDR24: + /* An ADDR24 or REL24 branching to a linkage function may be + followed by a nop that we have to replace with an ld in + order to restore the TOC base pointer. Only calls to + shared objects need to alter the TOC base. These are + recognized by their need for a PLT entry. */ + if (h != NULL + && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 + /* Make sure that there really is an instruction after + the branch that we can decode. */ + && (rel->r_offset - input_section->vma + 8 + <= input_section->_cooked_size)) + { + bfd_byte *pnext; + unsigned long insn; + + pnext = contents + (rel->r_offset - input_section->vma) + 4; + insn = bfd_get_32 (input_bfd, pnext); + + if (insn == 0x60000000 /* nop (ori r0,r0,0) */ + || insn == 0x4def7b82 /* cror 15,15,15 */ + || insn == 0x4ffffb82) /* cror 31,31,31 */ + { + bfd_put_32 (input_bfd, 0xe8410028, pnext); /* ld r2,40(r1) */ +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_relocate_section: " \ + "patched nop after call to %s\n", sym_name); +#endif + } + } + /* fall through */ + + case (int) R_PPC64_REL64: + case (int) R_PPC64_REL32: + case (int) R_PPC64_REL14: + /* If these relocations are not to a named symbol, they can be + handled right here, no need to bother the dynamic linker. */ + if (h == NULL && r_type != R_PPC64_ADDR24) + break; + /* fall through */ + + /* Relocations that always need to be propagated if this is a shared + object. */ + case (int) R_PPC64_NONE: + case (int) R_PPC64_ADDR64: + case (int) R_PPC64_ADDR32: + case (int) R_PPC64_ADDR16: + case (int) R_PPC64_ADDR16_LO: + case (int) R_PPC64_ADDR16_DS: + case (int) R_PPC64_ADDR16_LO_DS: + case (int) R_PPC64_ADDR16_HI: + case (int) R_PPC64_ADDR16_HA: + case (int) R_PPC64_ADDR16_HIGHER: + case (int) R_PPC64_ADDR16_HIGHERA: + case (int) R_PPC64_ADDR16_HIGHEST: + case (int) R_PPC64_ADDR16_HIGHESTA: + case (int) R_PPC64_ADDR14: + case (int) R_PPC64_UADDR64: + case (int) R_PPC64_UADDR32: + case (int) R_PPC64_UADDR16: + case (int) R_PPC64_TOC: + if (info->shared) + { + Elf_Internal_Rela outrel; + boolean skip; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_relocate_section need to create relocation for %s\n", + (h && h->root.root.string + ? h->root.root.string + : "<unknown>")); +#endif + + /* When generating a shared object, these relocations + are copied into the output file to be resolved at run + time. */ + + if (sreloc == NULL) + { + const char *name; + + name = (bfd_elf_string_from_elf_section + (input_bfd, + elf_elfheader (input_bfd)->e_shstrndx, + elf_section_data (input_section)->rel_hdr.sh_name)); + if (name == NULL) + return false; + + BFD_ASSERT (strncmp (name, ".rela", 5) == 0 + && strcmp (bfd_get_section_name (input_bfd, + input_section), + name + 5) == 0); + + sreloc = bfd_get_section_by_name (dynobj, name); + BFD_ASSERT (sreloc != NULL); + } + + skip = false; + + if (elf_section_data (input_section)->stab_info == NULL) + outrel.r_offset = rel->r_offset; + else + { + bfd_vma off; + + off = (_bfd_stab_section_offset + (output_bfd, &elf_hash_table (info)->stab_info, + input_section, + &elf_section_data (input_section)->stab_info, + rel->r_offset)); + if (off == (bfd_vma) -1) + skip = true; + outrel.r_offset = off; + } + + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + + if (skip) + memset (&outrel, 0, sizeof outrel); + /* h->dynindx may be -1 if this symbol was marked to + become local. */ + else if (h != NULL + && ((! info->symbolic && h->dynindx != -1) + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + { + BFD_ASSERT (h->dynindx != -1); + outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); + outrel.r_addend = rel->r_addend; + } + else + { + if (r_type == R_PPC64_ADDR64) + { + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + outrel.r_addend = relocation + rel->r_addend; + } + else + { + long indx; + + if (h == NULL) + sec = local_sections[r_symndx]; + else + { + BFD_ASSERT (h->root.type == bfd_link_hash_defined + || (h->root.type + == bfd_link_hash_defweak)); + sec = h->root.u.def.section; + } + + if (r_type == R_PPC64_TOC + || (sec != NULL && bfd_is_abs_section (sec))) + { + indx = 0; + } + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + else + { + asection *osec; + + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + BFD_ASSERT (indx > 0); +#ifdef DEBUG + if (indx <= 0) + { + printf ("indx=%ld section=%s flags=%08x name=%s\n", + indx, osec->name, osec->flags, + h->root.root.string); + } +#endif + } + + outrel.r_info = ELF64_R_INFO (indx, r_type); + outrel.r_addend = relocation + rel->r_addend; + } + } + + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + (((Elf64_External_Rela *) + sreloc->contents) + + sreloc->reloc_count)); + ++sreloc->reloc_count; + + /* This reloc will be computed at runtime, so there's no + need to do anything now, unless this is a RELATIVE + reloc in an unallocated section. */ + if (skip + || (input_section->flags & SEC_ALLOC) != 0 + || ELF64_R_TYPE (outrel.r_info) != R_PPC64_RELATIVE) + continue; + } + + /* Arithmetic adjust relocations that aren't going into a + shared object. */ + if ((r_type == R_PPC64_ADDR16_HA + || r_type == R_PPC64_ADDR16_HIGHERA + || r_type == R_PPC64_ADDR16_HIGHESTA) + /* It's just possible that this symbol is a weak symbol + that's not actually defined anywhere. In that case, + 'sec' would be NULL, and we should leave the symbol + alone (it will be set to zero elsewhere in the link). */ + && sec != NULL) + { + addend += ((relocation + addend) & 0x8000) << 1; + } + break; + + /* Branch taken prediction relocations. */ + case (int) R_PPC64_ADDR14_BRTAKEN: + case (int) R_PPC64_REL14_BRTAKEN: + insn = bfd_get_32 (output_bfd, contents + offset); + if ((relocation - offset) & 0x8000) + insn &= ~BRANCH_PREDICT_BIT; + else + insn |= BRANCH_PREDICT_BIT; + bfd_put_32 (output_bfd, insn, contents + offset); + break; + + /* Branch not taken predicition relocations. */ + case (int) R_PPC64_ADDR14_BRNTAKEN: + case (int) R_PPC64_REL14_BRNTAKEN: + insn = bfd_get_32 (output_bfd, contents + offset); + if ((relocation - offset) & 0x8000) + insn |= BRANCH_PREDICT_BIT; + else + insn &= ~BRANCH_PREDICT_BIT; + bfd_put_32 (output_bfd, insn, contents + offset); + break; + + + /* GOT16 relocations. Like an ADDR16 using the symbol's + address in the GOT as relocation value instead of the + symbols value itself. Also, create a GOT entry for the + symbol and put the symbol value there. */ + /* FIXME: If the symbol is not in the .got section + (typically in the .toc section) we fail (h->got.offset is + 0). */ + /* NOTE: Sets `relocation'. */ + case (int) R_PPC64_GOT16: + case (int) R_PPC64_GOT16_LO: + case (int) R_PPC64_GOT16_HI: + case (int) R_PPC64_GOT16_HA: + case (int) R_PPC64_GOT16_DS: + case (int) R_PPC64_GOT16_LO_DS: + { + /* Relocation is to the entry for this symbol in the global + offset table. */ + bfd_vma off; + BFD_ASSERT (sgot != NULL); + + if (h != NULL) + { + off = h->got.offset; + BFD_ASSERT (off != (bfd_vma) -1); + + if (! elf_hash_table (info)->dynamic_sections_created + || (info->shared + && (info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR))) + { + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally. We must initialize this entry in the + global offset table. Since the offset must + always be a multiple of 4, we use the least + significant bit to record whether we have + initialized it already. + + When doing a dynamic link, we create a .rela.got + relocation entry to initialize the value. This + is done in the finish_dynamic_symbol routine. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_64 (output_bfd, relocation, + sgot->contents + off); + h->got.offset |= 1; + } + } + } + else + { + BFD_ASSERT (local_got_offsets != NULL + && local_got_offsets[r_symndx] != (bfd_vma) -1); + + off = local_got_offsets[r_symndx]; + + /* The offset must always be a multiple of 4. We use + the least significant bit to record whether we have + already processed this entry. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_64 (output_bfd, relocation, sgot->contents + off); + + if (info->shared) + { + asection *srelgot; + Elf_Internal_Rela outrel; + + /* We need to generate a R_PPC64_RELATIVE reloc + for the dynamic linker. */ + srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (srelgot != NULL); + + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + outrel.r_addend = relocation; + bfd_elf64_swap_reloca_out (output_bfd, &outrel, + (((Elf64_External_Rela *) + srelgot->contents) + + srelgot->reloc_count)); + ++srelgot->reloc_count; + } + + local_got_offsets[r_symndx] |= 1; + } + } + + relocation = sgot->output_offset + off; + /* TOC base (r2) is TOC start plus 0x8000. */ + addend -= TOC_BASE_OFF; + break; + } + + /* TOC16 relocs. We want the offset relative to the TOC base, + which is the address of the start of the TOC plus 0x8000. + The TOC consists of sections .got, .toc, .tocbss, and .plt, + in this order. */ + + case (int) R_PPC64_TOC16: + case (int) R_PPC64_TOC16_LO: + case (int) R_PPC64_TOC16_HI: + case (int) R_PPC64_TOC16_DS: + case (int) R_PPC64_TOC16_LO_DS: + BFD_ASSERT (sec != (asection *) 0); + /* Only .got, .toc and *UND* symbols are allowed. */ + BFD_ASSERT (bfd_is_und_section (sec) + || strcmp (bfd_get_section_name (abfd, sec), + ".got") == 0 + || strcmp (bfd_get_section_name (abfd, sec), + ".toc") == 0); + + addend -= TOCstart + TOC_BASE_OFF; + break; + + case (int) R_PPC64_TOC16_HA: + BFD_ASSERT (sec != (asection *) 0); + BFD_ASSERT (bfd_is_und_section (sec) + || strcmp (bfd_get_section_name (abfd, sec), + ".got") == 0 + || strcmp (bfd_get_section_name (abfd, sec), + ".toc") == 0); + + addend -= TOCstart + TOC_BASE_OFF; + /* Add 1 to 16-bit word 16:31 if sign bit in 0:15 is set. */ + addend += ((relocation + addend) & 0x8000) << 1; + break; + + /* Relocate against the beginning of the section. */ + case (int) R_PPC64_SECTOFF: + case (int) R_PPC64_SECTOFF_LO: + case (int) R_PPC64_SECTOFF_HI: + case (int) R_PPC64_SECTOFF_DS: + case (int) R_PPC64_SECTOFF_LO_DS: + BFD_ASSERT (sec != (asection *) 0); + addend -= sec->output_section->vma; + break; + + case (int) R_PPC64_SECTOFF_HA: + BFD_ASSERT (sec != (asection *) 0); + addend -= sec->output_section->vma; + addend += ((relocation + addend) & 0x8000) << 1; + break; + + case (int) R_PPC64_COPY: + case (int) R_PPC64_GLOB_DAT: + case (int) R_PPC64_JMP_SLOT: + case (int) R_PPC64_RELATIVE: + case (int) R_PPC64_PLT32: + case (int) R_PPC64_PLTREL32: + case (int) R_PPC64_PLT16_LO: + case (int) R_PPC64_PLT16_LO_DS: + case (int) R_PPC64_PLT16_HI: + case (int) R_PPC64_PLT16_HA: + case (int) R_PPC64_PLT64: + case (int) R_PPC64_PLTREL64: + case (int) R_PPC64_PLTGOT16: + case (int) R_PPC64_PLTGOT16_LO: + case (int) R_PPC64_PLTGOT16_DS: + case (int) R_PPC64_PLTGOT16_LO_DS: + case (int) R_PPC64_PLTGOT16_HI: + case (int) R_PPC64_PLTGOT16_HA: + (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."), + bfd_get_filename (input_bfd), + ppc64_elf_howto_table[(int) r_type]->name, + sym_name); + + bfd_set_error (bfd_error_invalid_operation); + ret = false; + continue; + + case (int) R_PPC_GNU_VTINHERIT: + case (int) R_PPC_GNU_VTENTRY: + /* These are no-ops in the end. */ + continue; + } + +#ifdef DEBUG + fprintf (stderr, " type = %s (%d), name = %s, sym index = %ld, offset = %ld, addend = %ld\n", + howto->name, + (int) r_type, + sym_name, + 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) + ; + else if (r == bfd_reloc_overflow) + { + const char *name; + + if (h != NULL) + { + if (h->root.type == bfd_link_hash_undefweak + && howto->pc_relative) + { + /* Assume this is a call protected by other code that + detects the symbol is undefined. If this is the case, + we can safely ignore the overflow. If not, the + program is hosed anyway, and a little warning isn't + going to help. */ + + continue; + } + + 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) + continue; + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + if (! (*info->callbacks->reloc_overflow) (info, + name, + howto->name, + (bfd_vma) 0, + input_bfd, + input_section, + offset)) + return false; + } + else + ret = false; + } + +#ifdef DEBUG + fprintf (stderr, "\n"); +#endif + + return ret; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static boolean +ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) + bfd *output_bfd; + struct bfd_link_info *info; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; +{ + bfd *dynobj; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_finish_dynamic_symbol called for %s", + h->root.root.string); +#endif + + dynobj = elf_hash_table (info)->dynobj; + BFD_ASSERT (dynobj != NULL); + + if (h->plt.offset != (bfd_vma) -1) + { + asection *splt, *srela, *sglink; + Elf_Internal_Rela rela; + bfd_vma reloc_index, plt_offset; + struct elf_link_hash_entry *funcdesc_h; + +#ifdef DEBUG + fprintf (stderr, ", plt_offset = 0x%lx", (unsigned long) h->plt.offset); +#endif + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + + BFD_ASSERT (h->dynindx != -1); + + splt = bfd_get_section_by_name (dynobj, ".plt"); + srela = bfd_get_section_by_name (dynobj, ".rela.plt"); + BFD_ASSERT (splt != NULL && srela != NULL); + + /* We don't need to fill in the .plt. The dynamic linker will + fill it in. */ + + /* We may need to create a linkage function. */ + sglink = bfd_get_section_by_name (dynobj, ".glink"); + if (sglink != NULL && h->root.u.def.section == sglink) + { + bfd_byte *p; + bfd_vma pltoff; + const unsigned int *stub; + + /* Where to write it. */ + p = h->root.u.def.section->contents + h->root.u.def.value; + + /* The function descriptor is in the PLT. */ + pltoff = splt->output_section->vma + + splt->output_section->output_offset + + h->plt.offset + - elf_gp (output_bfd) - TOC_BASE_OFF; + + if (pltoff + 0x8000 > 0xffff) + { + (*_bfd_error_handler) + (_("linkage table overflow against `%s'"), + h->root.root.string); + } + + /* Write it out. */ + stub = ppc64_elf_glink_code; + bfd_put_32 (output_bfd, *stub | (pltoff & 0xfffc), p); + while (p += 4, ++stub < (ppc64_elf_glink_code + + (sizeof (ppc64_elf_glink_code) + / sizeof (*ppc64_elf_glink_code)))); + { + bfd_put_32 (output_bfd, *stub, p); + } +#ifdef DEBUG + fprintf (stderr, ", linkage function"); +#endif + } + + /* Create a JMP_SLOT reloc to inform the dynamic linker to fix + the PLT entry. */ + + /* Save the PLT offset, since `h' may be changed below. */ + plt_offset = h->plt.offset; + + /* If it's a function entry point, find its corresponding + function descriptor. ppc64_elf_adjust_dynamic_symbol have + already set it up for us. */ + + /* FIXME: Is it safe to assume that this symbol is a function? */ + BFD_ASSERT (h->root.root.string[0] == '.'); + + /* FIXME: Follow bfd_link_hash_indirect? */ + funcdesc_h = elf_link_hash_lookup (elf_hash_table (info), + h->root.root.string + 1, + false, false, false); + BFD_ASSERT (funcdesc_h != NULL); + BFD_ASSERT (funcdesc_h->dynindx != -1); + + /* FIXME: Rename the symbol for the function entry point to + `linkage_for_FUNC'? */ + + rela.r_offset = (splt->output_section->vma + + splt->output_offset + + plt_offset); + rela.r_info = ELF64_R_INFO (funcdesc_h->dynindx, R_PPC64_JMP_SLOT); + rela.r_addend = 0; + + reloc_index = (plt_offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE; + bfd_elf64_swap_reloca_out (output_bfd, &rela, + ((Elf64_External_Rela *) srela->contents + + reloc_index)); +#ifdef DEBUG + fprintf (stderr, ", JMP_SLOT for %s", funcdesc_h->root.root.string); +#endif + +#if 0 + /* FIXME: Really do this? */ + if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + /* Mark the symbol as undefined, rather than as defined in + the .plt section. Leave the value alone. */ + sym->st_shndx = SHN_UNDEF; + } +#endif + } + + if (h->got.offset != (bfd_vma) -1) + { + asection *sgot; + asection *srela; + Elf_Internal_Rela rela; + +#ifdef DEBUG + fprintf (stderr, ", got.offset = %08lx", (unsigned long) h->got.offset); +#endif + + /* This symbol has an entry in the global offset table. Set it + up. */ + + sgot = bfd_get_section_by_name (dynobj, ".got"); + srela = bfd_get_section_by_name (dynobj, ".rela.got"); + BFD_ASSERT (sgot != NULL && srela != NULL); + + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + (h->got.offset &~ 1)); + + /* If this is a -Bsymbolic link, and the symbol is defined + locally, we just want to emit a RELATIVE reloc. The entry in + the global offset table will already have been initialized in + the relocate_section function. */ + if (info->shared + && (info->symbolic || h->dynindx == -1) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + { + rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + rela.r_addend = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + BFD_ASSERT ((h->got.offset & 1) == 0); + bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT); + rela.r_addend = 0; + } + + bfd_elf64_swap_reloca_out (output_bfd, &rela, + ((Elf64_External_Rela *) srela->contents + + srela->reloc_count)); + ++srela->reloc_count; + } + + if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) + { + asection *s; + Elf_Internal_Rela rela; + + /* This symbols needs a copy reloc. Set it up. */ + +#ifdef DEBUG + fprintf (stderr, ", copy"); +#endif + + BFD_ASSERT (h->dynindx != -1); + + s = bfd_get_section_by_name (h->root.u.def.section->owner, + ".rela.bss"); + BFD_ASSERT (s != NULL); + + rela.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); + rela.r_addend = 0; + bfd_elf64_swap_reloca_out (output_bfd, &rela, + ((Elf64_External_Rela *) s->contents + + s->reloc_count)); + ++s->reloc_count; + } + +#ifdef DEBUG + fprintf (stderr, "\n"); +#endif + + /* Mark some specially defined symbols as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0) + sym->st_shndx = SHN_ABS; + + return true; +} + +/* Finish up the dynamic sections. */ + +static boolean +ppc64_elf_finish_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + asection *sdyn; + bfd *dynobj = elf_hash_table (info)->dynobj; + +#ifdef DEBUG + fprintf (stderr, "ppc64_elf_finish_dynamic_sections called\n"); +#endif + + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + if (elf_hash_table (info)->dynamic_sections_created) + { + asection *splt; + Elf64_External_Dyn *dyncon, *dynconend; + + splt = bfd_get_section_by_name (dynobj, ".plt"); + BFD_ASSERT (splt != NULL && sdyn != NULL); + + dyncon = (Elf64_External_Dyn *) sdyn->contents; + dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + const char *name; + boolean size; + + bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + case DT_PLTGOT: name = ".plt"; size = false; break; + case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; + case DT_JMPREL: name = ".rela.plt"; size = false; break; + default: name = NULL; size = false; break; + } + + if (name != NULL) + { + asection *s; + + s = bfd_get_section_by_name (output_bfd, name); + if (s == NULL) + dyn.d_un.d_val = 0; + else + { + if (! size) + dyn.d_un.d_ptr = s->vma; + else + { + if (s->_cooked_size != 0) + dyn.d_un.d_val = s->_cooked_size; + else + dyn.d_un.d_val = s->_raw_size; + } + } + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } + } + + if (info->shared) + { + asection *sdynsym; + asection *s; + Elf_Internal_Sym sym; + int maxdindx = 0; + + /* Set up the section symbols for the output sections. */ + + sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); + BFD_ASSERT (sdynsym != NULL); + + sym.st_size = 0; + sym.st_name = 0; + sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); + sym.st_other = 0; + + for (s = output_bfd->sections; s != NULL; s = s->next) + { + int indx, dindx; + + sym.st_value = s->vma; + + indx = elf_section_data (s)->this_idx; + dindx = elf_section_data (s)->dynindx; + if (dindx != -1) + { + BFD_ASSERT (indx > 0); + BFD_ASSERT (dindx > 0); + + if (dindx > maxdindx) + maxdindx = dindx; + + sym.st_shndx = indx; + + bfd_elf64_swap_symbol_out (output_bfd, &sym, + (PTR) (((Elf64_External_Sym *) + sdynsym->contents) + + dindx)); + } + } + + /* Set the sh_info field of the output .dynsym section to the + index of the first global symbol. */ + elf_section_data (sdynsym->output_section)->this_hdr.sh_info = + maxdindx + 1; + } + + return true; +} + +#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec +#define TARGET_LITTLE_NAME "elf64-powerpcle" +#define TARGET_BIG_SYM bfd_elf64_powerpc_vec +#define TARGET_BIG_NAME "elf64-powerpc" +#define ELF_ARCH bfd_arch_powerpc +#define ELF_MACHINE_CODE EM_PPC64 +#define ELF_MAXPAGESIZE 0x10000 +#define elf_info_to_howto ppc64_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 elf_backend_want_got_sym 0 +#define elf_backend_want_plt_sym 0 +#define elf_backend_plt_alignment 3 +#define elf_backend_plt_not_loaded 1 +#define elf_backend_got_symbol_offset 0 +#define elf_backend_got_header_size 0 +#define elf_backend_can_gc_sections 1 + +#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE + +#define bfd_elf64_bfd_copy_private_bfd_data ppc64_elf_copy_private_bfd_data +#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data +#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup +#define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags +#define bfd_elf64_bfd_final_link ppc64_elf_final_link + +#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook +#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr +#define elf_backend_relocate_section ppc64_elf_relocate_section +#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections +#define elf_backend_check_relocs ppc64_elf_check_relocs +#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol +#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections +#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections +#define elf_backend_fake_sections ppc64_elf_fake_sections + +#include "elf64-target.h" |