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5bd4f1692e
targ64_selvecs for 32 bit powerpc targets. * Makefile.am (BFD64_BACKENDS): Add elf64-ppc.lo. (BFD64_BACKENDS_CFILES): Add elf64-ppc.c. Run "make dep-am". * Makefile.in: Regenerate. * configure.in: Add elf64_powerpc vecs. * configure: Regenerate. * cpu-powerpc.c: Default to bfd_mach_ppc_620 entry for 64 bit. * elf.c (prep_headers): EM_PPC64 for 64 bit ppc elf target. * targets.c: Add bfd_elf64_powerpc_vec and bfd_elf64_powerpcle_vec. * elf64-ppc.c: New file. * reloc.c: Add powerpc64 relocs. * libbfd.h: Regenerate. * bfd-in2.h: Regenerate.
3769 lines
114 KiB
C
3769 lines
114 KiB
C
/* PowerPC64-specific support for 64-bit ELF.
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Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
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Written by Linus Nordberg, Swox AB <info@swox.com>,
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based on elf32-ppc.c by Ian Lance Taylor.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
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on the file elf32-ppc.c. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/ppc.h"
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#define USE_RELA /* we want RELA relocations, not REL. */
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static void ppc_howto_init
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PARAMS ((void));
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static reloc_howto_type *ppc64_elf_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void ppc64_elf_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
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static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static boolean ppc64_elf_set_private_flags
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PARAMS ((bfd *, flagword));
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static boolean ppc64_elf_copy_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean ppc64_elf_merge_private_bfd_data
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PARAMS ((bfd *, bfd *));
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static boolean ppc64_elf_section_from_shdr
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PARAMS ((bfd *, Elf64_Internal_Shdr *, char *));
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static boolean ppc64_elf_create_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean ppc64_elf_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static asection * ppc64_elf_gc_mark_hook
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PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel,
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struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
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static boolean ppc64_elf_gc_sweep_hook
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PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
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const Elf_Internal_Rela *relocs));
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static boolean ppc64_elf_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static boolean ppc_adjust_dynindx
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static boolean ppc64_elf_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean ppc64_elf_final_link
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean ppc64_elf_fake_sections
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PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *));
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static boolean ppc64_elf_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
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asection **));
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static boolean ppc64_elf_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static boolean ppc64_elf_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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/* Branch prediction bit for branch taken relocs. */
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#define BRANCH_PREDICT_BIT 0x200000
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/* Mask to set RA in memory instructions. */
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#define RA_REGISTER_MASK 0x001f0000
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/* Value to shift register by to insert RA. */
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#define RA_REGISTER_SHIFT 16
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The size in bytes of an entry in the procedure linkage table. */
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#define PLT_ENTRY_SIZE 24
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/* The initial size of the plt reserved for the dynamic linker. */
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#define PLT_INITIAL_ENTRY_SIZE 96
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/* TOC base pointers offset from start of TOC. */
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#define TOC_BASE_OFF (0x8000)
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/* Global linkage stub. The first instruction has its offset patched. */
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/* FIXME: Need traceback table? */
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static const unsigned int ppc64_elf_glink_code[] = {
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0xe9820000, /* ld %r12,0(%r2) */
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0xf8410028, /* std %r2,40(%r1) */
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0xe80c0000, /* ld %r0,0(%r12) */
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0xe84c0008, /* ld %r2,8(%r12) */
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0x7c0903a6, /* mtctr %r0 */
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0x4e800420 /* bctr */
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};
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#define PPC64_ELF_GLINK_SIZE \
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((sizeof ppc64_elf_glink_code / sizeof ppc64_elf_glink_code[0]) * 4)
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/* Relocation HOWTO's. */
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static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
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static reloc_howto_type ppc64_elf_howto_raw[] = {
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/* This reloc does nothing. */
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HOWTO (R_PPC64_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 32 bit relocation. */
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HOWTO (R_PPC64_ADDR32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR32", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 26 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_PPC64_ADDR16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit relocation without overflow. */
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HOWTO (R_PPC64_ADDR16_LO, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_LO", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address. */
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HOWTO (R_PPC64_ADDR16_HI, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR16_HI", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Bits 16-31 of an address, plus 1 if the contents of the low 16
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bits, treated as a signed number, is negative. */
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HOWTO (R_PPC64_ADDR16_HA, /* type */
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16, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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ppc64_elf_addr16_ha_reloc, /* special_function */
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"R_PPC64_ADDR16_HA", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC64_ADDR14, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR14", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is expected to be taken. The lower two
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bits must be zero. */
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HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR14_BRTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is not expected to be taken. The lower
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two bits must be zero. */
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HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_ADDR14_BRNTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A relative 26 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC64_REL24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_REL24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 16 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC64_REL14, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_REL14", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 16 bit branch. Bit 10 should be set to indicate that
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the branch is expected to be taken. The lower two bits must be
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zero. */
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HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_REL14_BRTAKEN", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 16 bit branch. Bit 10 should be set to indicate that
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the branch is not expected to be taken. The lower two bits must
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be zero. */
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HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_REL14_BRNTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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||
0xfffc, /* dst_mask */
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true), /* pcrel_offset */
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/* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
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symbol. */
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HOWTO (R_PPC64_GOT16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
|
||
0, /* bitpos */
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||
complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC64_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
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||
false), /* pcrel_offset */
|
||
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||
/* 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
|
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#define TARGET_BIG_NAME "elf64-powerpc"
|
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#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"
|