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binutils-gdb/bfd/elf64-ppc.c
Alan Modra 0a991dfe0d * elflink.h (elf_fix_symbol_flags): Copy flags to weakdef using 
elf_backend_copy_indirect_symbol so that backend has a chance to
	copy other necessary fields.
	* elf-bfd.h (struct elf_backend_data): Update description of
	elf_backend_copy_indirect_symbol.
	* elf.c (_bfd_elf_link_hash_copy_indirect): Bail out after
	copying flags if this is a weakdef.
	* elfxx-ia64.c (elfNN_ia64_hash_copy_indirect): Likewise.
	(elfNN_ia64_aix_add_symbol_hook): Use elf_link_hash_lookup rather
	than bfd_link_hash_lookup.
	* elf32-i386 (elf_i386_adjust_dynamic_symbol): Don't do copy
	reloc processing for weakdefs.
	* elf32-hppa.c (elf32_hppa_adjust_dynamic_symbol): Likewise.
	* elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Likewise.
2001-10-03 08:33:18 +00:00

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/* PowerPC64-specific support for 64-bit ELF.
Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
Written by Linus Nordberg, Swox AB <info@swox.com>,
based on elf32-ppc.c by Ian Lance Taylor.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file is based on the 64-bit PowerPC ELF ABI. It is also based
on the file elf32-ppc.c. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc.h"
#define USE_RELA /* we want RELA relocations, not REL. */
static void ppc_howto_init
PARAMS ((void));
static reloc_howto_type *ppc64_elf_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void ppc64_elf_info_to_howto
PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst));
static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static boolean ppc64_elf_set_private_flags
PARAMS ((bfd *, flagword));
static boolean ppc64_elf_copy_private_bfd_data
PARAMS ((bfd *, bfd *));
static boolean ppc64_elf_merge_private_bfd_data
PARAMS ((bfd *, bfd *));
static boolean ppc64_elf_section_from_shdr
PARAMS ((bfd *, Elf64_Internal_Shdr *, char *));
static struct bfd_hash_entry *link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create
PARAMS ((bfd *));
static boolean create_got_section
PARAMS ((bfd *, struct bfd_link_info *));
static boolean ppc64_elf_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static void ppc64_elf_copy_indirect_symbol
PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
static boolean ppc64_elf_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
static asection * ppc64_elf_gc_mark_hook
PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel,
struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
static boolean ppc64_elf_gc_sweep_hook
PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec,
const Elf_Internal_Rela *relocs));
static boolean ppc64_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static boolean allocate_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean readonly_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static enum elf_reloc_type_class ppc64_elf_reloc_type_class
PARAMS ((const Elf_Internal_Rela *));
static boolean ppc64_elf_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static boolean ppc64_elf_final_link
PARAMS ((bfd *, struct bfd_link_info *));
static boolean ppc64_elf_fake_sections
PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *));
static boolean ppc64_elf_relocate_section
PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
asection **));
static boolean ppc64_elf_finish_dynamic_symbol
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
Elf_Internal_Sym *));
static boolean ppc64_elf_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
/* Branch prediction bit for branch taken relocs. */
#define BRANCH_PREDICT_BIT 0x200000
/* Mask to set RA in memory instructions. */
#define RA_REGISTER_MASK 0x001f0000
/* Value to shift register by to insert RA. */
#define RA_REGISTER_SHIFT 16
/* The name of the dynamic interpreter. This is put in the .interp
section. */
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
/* The size in bytes of an entry in the procedure linkage table. */
#define PLT_ENTRY_SIZE 24
/* The initial size of the plt reserved for the dynamic linker. */
#define PLT_INITIAL_ENTRY_SIZE 96
/* TOC base pointers offset from start of TOC. */
#define TOC_BASE_OFF (0x8000)
/* Global linkage stub. The first instruction has its offset patched. */
/* FIXME: Need traceback table? */
static const unsigned int ppc64_elf_glink_code[] = {
0xe9820000, /* ld %r12,0(%r2) */
0xf8410028, /* std %r2,40(%r1) */
0xe80c0000, /* ld %r0,0(%r12) */
0xe84c0008, /* ld %r2,8(%r12) */
0x7c0903a6, /* mtctr %r0 */
0x4e800420 /* bctr */
};
#define PPC64_ELF_GLINK_SIZE \
((sizeof ppc64_elf_glink_code / sizeof ppc64_elf_glink_code[0]) * 4)
/* Relocation HOWTO's. */
static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_max];
static reloc_howto_type ppc64_elf_howto_raw[] = {
/* This reloc does nothing. */
HOWTO (R_PPC64_NONE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* A standard 32 bit relocation. */
HOWTO (R_PPC64_ADDR32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR32", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 26 bit branch; the lower two bits must be zero.
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC64_ADDR24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR24", /* name */
false, /* partial_inplace */
0, /* src_mask */
0x3fffffc, /* dst_mask */
false), /* pcrel_offset */
/* A standard 16 bit relocation. */
HOWTO (R_PPC64_ADDR16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* A 16 bit relocation without overflow. */
HOWTO (R_PPC64_ADDR16_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Bits 16-31 of an address. */
HOWTO (R_PPC64_ADDR16_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Bits 16-31 of an address, plus 1 if the contents of the low 16
bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 16 bit branch; the lower two bits must be zero.
FIXME: we don't check that, we just clear them. */
HOWTO (R_PPC64_ADDR14, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR14", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 16 bit branch, for which bit 10 should be set to
indicate that the branch is expected to be taken. The lower two
bits must be zero. */
HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR14_BRTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* An absolute 16 bit branch, for which bit 10 should be set to
indicate that the branch is not expected to be taken. The lower
two bits must be zero. */
HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR14_BRNTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* A relative 26 bit branch; the lower two bits must be zero. */
HOWTO (R_PPC64_REL24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL24", /* name */
false, /* partial_inplace */
0, /* src_mask */
0x3fffffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch; the lower two bits must be zero. */
HOWTO (R_PPC64_REL14, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL14", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch. Bit 10 should be set to indicate that
the branch is expected to be taken. The lower two bits must be
zero. */
HOWTO (R_PPC64_REL14_BRTAKEN, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL14_BRTAKEN", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
true), /* pcrel_offset */
/* A relative 16 bit branch. Bit 10 should be set to indicate that
the branch is not expected to be taken. The lower two bits must
be zero. */
HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL14_BRNTAKEN",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
true), /* pcrel_offset */
/* Like R_PPC64_ADDR16, but referring to the GOT table entry for the
symbol. */
HOWTO (R_PPC64_GOT16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GOT16", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for
the symbol. */
HOWTO (R_PPC64_GOT16_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GOT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for
the symbol. */
HOWTO (R_PPC64_GOT16_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GOT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for
the symbol. */
HOWTO (R_PPC64_GOT16_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_GOT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* This is used only by the dynamic linker. The symbol should exist
both in the object being run and in some shared library. The
dynamic linker copies the data addressed by the symbol from the
shared library into the object, because the object being
run has to have the data at some particular address. */
HOWTO (R_PPC64_COPY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_COPY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR64, but used when setting global offset table
entries. */
HOWTO (R_PPC64_GLOB_DAT, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GLOB_DAT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Created by the link editor. Marks a procedure linkage table
entry for a symbol. */
HOWTO (R_PPC64_JMP_SLOT, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_JMP_SLOT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* Used only by the dynamic linker. When the object is run, this
doubleword64 is set to the load address of the object, plus the
addend. */
HOWTO (R_PPC64_RELATIVE, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_RELATIVE", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR32, but may be unaligned. */
HOWTO (R_PPC64_UADDR32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_UADDR32", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16, but may be unaligned. */
HOWTO (R_PPC64_UADDR16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_UADDR16", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 32-bit PC relative. */
HOWTO (R_PPC64_REL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
/* FIXME: Verify. Was complain_overflow_bitfield. */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL32", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
true), /* pcrel_offset */
/* 32-bit relocation to the symbol's procedure linkage table.
FIXME: R_PPC64_PLT32 not supported. */
HOWTO (R_PPC64_PLT32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLT32", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
FIXME: R_PPC64_PLTREL32 not supported. */
HOWTO (R_PPC64_PLTREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTREL32", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for
the symbol. */
HOWTO (R_PPC64_PLT16_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for
the symbol. */
HOWTO (R_PPC64_PLT16_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for
the symbol. */
HOWTO (R_PPC64_PLT16_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_PLT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 32-bit section relative relocation. */
/* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
dst_mask=0. */
HOWTO (R_PPC64_SECTOFF, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_SECTOFF", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* 16-bit lower half section relative relocation. */
HOWTO (R_PPC64_SECTOFF_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_SECTOFF_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 16-bit upper half section relative relocation. */
HOWTO (R_PPC64_SECTOFF_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_SECTOFF_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 16-bit upper half adjusted section relative relocation. */
HOWTO (R_PPC64_SECTOFF_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_SECTOFF_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_REL24 without touching the two least significant
bits. */
/* FIXME: Verify R_PPC64_ADDR30. */
HOWTO (R_PPC64_ADDR30, /* type */
2, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
30, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR30", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffffffc, /* dst_mask */
true), /* pcrel_offset */
/* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */
/* A standard 64-bit relocation. */
HOWTO (R_PPC64_ADDR64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR64", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
false), /* pcrel_offset */
/* The bits 32-47 of an address. */
HOWTO (R_PPC64_ADDR16_HIGHER, /* type */
32, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHER", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* The bits 32-47 of an address, plus 1 if the contents of the low
16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */
32, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHERA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* The bits 48-63 of an address. */
HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */
48, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHEST", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* The bits 48-63 of an address, plus 1 if the contents of the low
16 bits, treated as a signed number, is negative. */
HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */
48, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_ADDR16_HIGHESTA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like ADDR64, but may be unaligned. */
HOWTO (R_PPC64_UADDR64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_UADDR64", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
false), /* pcrel_offset */
/* 64-bit relative relocation. */
HOWTO (R_PPC64_REL64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_REL64", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
true), /* pcrel_offset */
/* 64-bit relocation to the symbol's procedure linkage table. */
/* FIXME: R_PPC64_PLT64 not supported. */
HOWTO (R_PPC64_PLT64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLT64", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* 64-bit PC relative relocation to the symbol's procedure linkage
table. */
/* FIXME: R_PPC64_PLTREL64 not supported. */
HOWTO (R_PPC64_PLTREL64, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTREL64", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* 16 bit TOC-relative relocation. */
/* R_PPC64_TOC16 47 half16* S + A - .TOC. */
HOWTO (R_PPC64_TOC16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC16", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 16 bit TOC-relative relocation without overflow. */
/* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */
HOWTO (R_PPC64_TOC16_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 16 bit TOC-relative relocation, high 16 bits. */
/* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */
HOWTO (R_PPC64_TOC16_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the
contents of the low 16 bits, treated as a signed number, is
negative. */
/* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */
HOWTO (R_PPC64_TOC16_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_TOC16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* 64-bit relocation; insert value of TOC base (.TOC.). */
/* R_PPC64_TOC 51 doubleword64 .TOC. */
HOWTO (R_PPC64_TOC, /* type */
0, /* rightshift */
4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */
64, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffffffffffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_GOT16, but also informs the link editor that the
value to relocate may (!) refer to a PLT entry which the link
editor (a) may replace with the symbol value. If the link editor
is unable to fully resolve the symbol, it may (b) create a PLT
entry and store the address to the new PLT entry in the GOT.
This permits lazy resolution of function symbols at run time.
The link editor may also skip all of this and just (c) emit a
R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */
/* FIXME: R_PPC64_PLTGOT16 not implemented. */
HOWTO (R_PPC64_PLTGOT16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTGOT16", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLTGOT16, but without overflow. */
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
HOWTO (R_PPC64_PLTGOT16_LO, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTGOT16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */
/* FIXME: R_PPC64_PLTGOT16_HI not implemented. */
HOWTO (R_PPC64_PLTGOT16_HI, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTGOT16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus
1 if the contents of the low 16 bits, treated as a signed number,
is negative. */
/* FIXME: R_PPC64_PLTGOT16_HA not implemented. */
HOWTO (R_PPC64_PLTGOT16_HA, /* type */
16, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
ppc64_elf_addr16_ha_reloc, /* special_function */
"R_PPC64_PLTGOT16_HA", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16, but for instructions with a DS field. */
HOWTO (R_PPC64_ADDR16_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_ADDR16_LO_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_ADDR16_LO_DS",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_GOT16, but for instructions with a DS field. */
HOWTO (R_PPC64_GOT16_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GOT16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_GOT16_LO_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_GOT16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_PLT16_LO_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLT16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_SECTOFF, but for instructions with a DS field. */
/* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and
dst_mask=0. */
HOWTO (R_PPC64_SECTOFF_DS, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_SECTOFF_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
true), /* pcrel_offset */
/* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_SECTOFF_LO_DS",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_TOC16, but for instructions with a DS field. */
HOWTO (R_PPC64_TOC16_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */
HOWTO (R_PPC64_TOC16_LO_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_TOC16_LO_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */
/* FIXME: R_PPC64_PLTGOT16_DS not implemented. */
HOWTO (R_PPC64_PLTGOT16_DS, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTGOT16_DS", /* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */
/* FIXME: R_PPC64_PLTGOT16_LO not implemented. */
HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC64_PLTGOT16_LO_DS",/* name */
false, /* partial_inplace */
0, /* src_mask */
0xfffc, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_PPC64_GNU_VTINHERIT, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_PPC64_GNU_VTINHERIT", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
/* GNU extension to record C++ vtable member usage. */
HOWTO (R_PPC64_GNU_VTENTRY, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_PPC64_GNU_VTENTRY", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
};
/* Initialize the ppc64_elf_howto_table, so that linear accesses can
be done. */
static void
ppc_howto_init ()
{
unsigned int i, type;
for (i = 0;
i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]);
i++)
{
type = ppc64_elf_howto_raw[i].type;
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
/ sizeof (ppc64_elf_howto_table[0])));
ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i];
}
}
static reloc_howto_type *
ppc64_elf_reloc_type_lookup (abfd, code)
bfd *abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE;
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
/* Initialize howto table if needed. */
ppc_howto_init ();
switch ((int) code)
{
default:
return (reloc_howto_type *) NULL;
case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE;
break;
case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32;
break;
case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24;
break;
case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16;
break;
case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO;
break;
case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI;
break;
case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA;
break;
case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14;
break;
case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN;
break;
case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN;
break;
case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24;
break;
case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14;
break;
case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN;
break;
case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN;
break;
case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16;
break;
case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO;
break;
case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI;
break;
case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA;
break;
case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY;
break;
case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT;
break;
case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32;
break;
case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32;
break;
case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32;
break;
case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO;
break;
case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI;
break;
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA;
break;
case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC64_SECTOFF;
break;
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO;
break;
case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI;
break;
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA;
break;
/* FIXME: Is CTOR 32 or 64 bits? Fix md_apply_fix3 in
gas/config/tc-ppc.c too. */
case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR32;
break;
case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64;
break;
case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER;
break;
case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA;
break;
case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST;
break;
case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA;
break;
case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64;
break;
case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64;
break;
case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64;
break;
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16;
break;
case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO;
break;
case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI;
break;
case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA;
break;
case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC;
break;
case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16;
break;
case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO;
break;
case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI;
break;
case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA;
break;
case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS;
break;
case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS;
break;
case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS;
break;
case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS;
break;
case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS;
break;
case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS;
break;
case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS;
break;
case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS;
break;
case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS;
break;
case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS;
break;
case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS;
break;
case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT;
break;
case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY;
break;
}
return ppc64_elf_howto_table[(int) ppc_reloc];
};
/* Set the howto pointer for a PowerPC ELF reloc. */
static void
ppc64_elf_info_to_howto (abfd, cache_ptr, dst)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *cache_ptr;
Elf64_Internal_Rela *dst;
{
unsigned int type;
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
/* Initialize howto table if needed. */
ppc_howto_init ();
type = ELF64_R_TYPE (dst->r_info);
BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table)
/ sizeof (ppc64_elf_howto_table[0])));
cache_ptr->howto = ppc64_elf_howto_table[type];
}
/* Handle the R_PPC_ADDR16_HA and similar relocs. */
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_archive_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_archive_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_archive_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_archive_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 functions are specific to the ELF linker, while
functions above are used generally. Those named ppc64_elf_* are
called by the main ELF linker code. They appear in this file more
or less in the order in which they are called. eg.
ppc64_elf_check_relocs is called early in the link process,
ppc64_elf_finish_dynamic_sections is one of the last functions
called. */
/* The linker needs to keep track of the number of relocs that it
decides to copy as dynamic relocs in check_relocs for each symbol.
This is so that it can later discard them if they are found to be
unnecessary. We store the information in a field extending the
regular ELF linker hash table. */
struct ppc_dyn_relocs
{
struct ppc_dyn_relocs *next;
/* The input section of the reloc. */
asection *sec;
/* Total number of relocs copied for the input section. */
bfd_size_type count;
/* Number of pc-relative relocs copied for the input section. */
bfd_size_type pc_count;
};
/* Of those relocs that might be copied as dynamic relocs, this macro
selects between relative and absolute types. */
#define IS_ABSOLUTE_RELOC(RTYPE) \
((RTYPE) != R_PPC64_REL14 \
&& (RTYPE) != R_PPC64_REL14_BRNTAKEN \
&& (RTYPE) != R_PPC64_REL14_BRTAKEN \
&& (RTYPE) != R_PPC64_REL24 \
&& (RTYPE) != R_PPC64_REL32 \
&& (RTYPE) != R_PPC64_REL64)
/* ppc64 ELF linker hash entry. */
struct ppc_link_hash_entry
{
struct elf_link_hash_entry elf;
/* Track dynamic relocs copied for this symbol. */
struct ppc_dyn_relocs *dyn_relocs;
};
/* ppc64 ELF linker hash table. */
struct ppc_link_hash_table
{
struct elf_link_hash_table elf;
/* Short-cuts to get to dynamic linker sections. */
asection *sgot;
asection *srelgot;
asection *splt;
asection *srelplt;
asection *sdynbss;
asection *srelbss;
asection *sglink;
};
/* Get the ppc64 ELF linker hash table from a link_info structure. */
#define ppc_hash_table(p) \
((struct ppc_link_hash_table *) ((p)->hash))
/* Create an entry in a ppc64 ELF linker hash table. */
static struct bfd_hash_entry *
link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (entry == NULL)
{
entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry));
if (entry == NULL)
return entry;
}
/* Call the allocation method of the superclass. */
entry = _bfd_elf_link_hash_newfunc (entry, table, string);
if (entry != NULL)
{
struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry;
eh->dyn_relocs = NULL;
}
return entry;
}
/* Create a ppc64 ELF linker hash table. */
static struct bfd_link_hash_table *
ppc64_elf_link_hash_table_create (abfd)
bfd *abfd;
{
struct ppc_link_hash_table *htab;
bfd_size_type amt = sizeof (struct ppc_link_hash_table);
htab = (struct ppc_link_hash_table *) bfd_alloc (abfd, amt);
if (htab == NULL)
return NULL;
if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc))
{
bfd_release (abfd, htab);
return NULL;
}
htab->sgot = NULL;
htab->srelgot = NULL;
htab->splt = NULL;
htab->srelplt = NULL;
htab->sdynbss = NULL;
htab->srelbss = NULL;
htab->sglink = NULL;
return &htab->elf.root;
}
/* Create .got and .rela.got sections in DYNOBJ, and set up
shortcuts to them in our hash table. */
static boolean
create_got_section (dynobj, info)
bfd *dynobj;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
if (! _bfd_elf_create_got_section (dynobj, info))
return false;
htab = ppc_hash_table (info);
htab->sgot = bfd_get_section_by_name (dynobj, ".got");
if (!htab->sgot)
abort ();
htab->srelgot = bfd_make_section (dynobj, ".rela.got");
if (!htab->srelgot
|| ! bfd_set_section_flags (dynobj, htab->srelgot,
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED
| SEC_READONLY))
|| ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
return false;
return true;
}
/* Create the .glink section as well as the ordinary dynamic
sections. */
static boolean
ppc64_elf_create_dynamic_sections (dynobj, info)
bfd *dynobj;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
flagword flags;
htab = ppc_hash_table (info);
if (!htab->sgot && !create_got_section (dynobj, info))
return false;
if (!_bfd_elf_create_dynamic_sections (dynobj, info))
return false;
htab->splt = bfd_get_section_by_name (dynobj, ".plt");
htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
if (!info->shared)
htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
if (!htab->splt || !htab->srelplt || !htab->sdynbss
|| (!info->shared && !htab->srelbss))
abort ();
/* Our .plt just contains pointers, no code. */
flags = bfd_get_section_flags (dynobj, htab->splt);
flags &= ~SEC_CODE;
if (! bfd_set_section_flags (dynobj, htab->splt, flags))
return false;
/* Create .glink for global linkage functions. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
htab->sglink = bfd_make_section (dynobj, ".glink");
if (htab->sglink == NULL
|| ! bfd_set_section_flags (dynobj, htab->sglink, flags)
|| ! bfd_set_section_alignment (dynobj, htab->sglink, 3))
return false;
return true;
}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
ppc64_elf_copy_indirect_symbol (dir, ind)
struct elf_link_hash_entry *dir, *ind;
{
struct ppc_link_hash_entry *edir, *eind;
edir = (struct ppc_link_hash_entry *) dir;
eind = (struct ppc_link_hash_entry *) ind;
if (edir->dyn_relocs == NULL)
{
edir->dyn_relocs = eind->dyn_relocs;
eind->dyn_relocs = NULL;
}
else if (eind->dyn_relocs != NULL)
abort ();
_bfd_elf_link_hash_copy_indirect (dir, ind);
}
/* Look through the relocs for a section during the first phase, and
calculate needed space in the global offset table, procedure
linkage table, and dynamic reloc sections. */
static boolean
ppc64_elf_check_relocs (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info;
asection *sec;
const Elf_Internal_Rela *relocs;
{
struct ppc_link_hash_table *htab;
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;
asection *sreloc;
if (info->relocateable)
return true;
htab = ppc_hash_table (info);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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;
enum elf_ppc_reloc_type r_type;
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];
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
/* GOT16 relocations */
case R_PPC64_GOT16:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_HI:
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
/* This symbol requires a global offset table entry. */
if (htab->sgot == NULL)
{
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (!create_got_section (htab->elf.dynobj, info))
return false;
}
if (h != NULL)
{
h->got.refcount += 1;
}
else
{
bfd_signed_vma *local_got_refcounts;
/* This is a global offset table entry for a local symbol. */
local_got_refcounts = elf_local_got_refcounts (abfd);
if (local_got_refcounts == NULL)
{
bfd_size_type size;
size = symtab_hdr->sh_info;
size *= sizeof (bfd_signed_vma);
local_got_refcounts = ((bfd_signed_vma *)
bfd_zalloc (abfd, size));
if (local_got_refcounts == NULL)
return false;
elf_local_got_refcounts (abfd) = local_got_refcounts;
}
local_got_refcounts[r_symndx] += 1;
}
break;
case R_PPC64_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
/* 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;
}
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
h->plt.refcount += 1;
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;
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:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR30:
case R_PPC64_ADDR32:
case R_PPC64_ADDR64:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
/* If we are creating a shared library, and this is a reloc
against a global symbol, or a non PC relative reloc
against a local symbol, then we need to copy the reloc
into the shared library. However, if we are linking with
-Bsymbolic, we do not need to copy a reloc against a
global symbol which is defined in an object we are
including in the link (i.e., DEF_REGULAR is set). At
this point we have not seen all the input files, so it is
possible that DEF_REGULAR is not set now but will be set
later (it is never cleared). In case of a weak definition,
DEF_REGULAR may be cleared later by a strong definition in
a shared library. We account for that possibility below by
storing information in the relocs_copied field of the hash
table entry. A similar situation occurs when creating
shared libraries and symbol visibility changes render the
symbol local.
If on the other hand, we are creating an executable, we
may need to keep relocations for symbols satisfied by a
dynamic library if we manage to avoid copy relocs for the
symbol. */
if ((info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& (IS_ABSOLUTE_RELOC (r_type)
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|| (!info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)))
{
/* We must copy these reloc types into the output file.
Create a reloc section in dynobj and make room for
this reloc. */
if (sreloc == NULL)
{
const char *name;
bfd *dynobj;
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;
if (strncmp (name, ".rela", 5) != 0
|| strcmp (bfd_get_section_name (abfd, sec),
name + 5) != 0)
{
(*_bfd_error_handler)
(_("%s: bad relocation section name `%s\'"),
bfd_archive_filename (abfd), name);
}
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
dynobj = htab->elf.dynobj;
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, 3))
return false;
}
elf_section_data (sec)->sreloc = sreloc;
}
/* If this is a global symbol, we count the number of
relocations we need for this symbol. */
if (h != NULL)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
eh = (struct ppc_link_hash_entry *) h;
p = eh->dyn_relocs;
if (p == NULL || p->sec != sec)
{
p = ((struct ppc_dyn_relocs *)
bfd_alloc (htab->elf.dynobj,
(bfd_size_type) sizeof *p));
if (p == NULL)
return false;
p->next = eh->dyn_relocs;
eh->dyn_relocs = p;
p->sec = sec;
p->count = 0;
p->pc_count = 0;
}
p->count += 1;
if (!IS_ABSOLUTE_RELOC (r_type))
p->pc_count += 1;
}
else
{
/* Track dynamic relocs needed for local syms too. */
elf_section_data (sec)->local_dynrel += 1;
}
}
break;
default:
}
}
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)
{
enum elf_ppc_reloc_type r_type;
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
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, .plt. and dynamic reloc 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;
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++)
{
unsigned long r_symndx;
enum elf_ppc_reloc_type r_type;
struct elf_link_hash_entry *h;
r_symndx = ELF64_R_SYM (rel->r_info);
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
switch (r_type)
{
case R_PPC64_GOT16:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_HA:
case R_PPC64_GOT16_HI:
case R_PPC64_GOT16_LO:
case R_PPC64_GOT16_LO_DS:
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_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
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;
case R_PPC64_REL14:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
case R_PPC64_REL32:
case R_PPC64_REL64:
if (r_symndx >= symtab_hdr->sh_info)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs **pp;
struct ppc_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
eh = (struct ppc_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
if (p->sec == sec)
{
p->pc_count -= 1;
p->count -= 1;
if (p->count == 0)
*pp = p->next;
break;
}
}
break;
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR30:
case R_PPC64_ADDR32:
case R_PPC64_ADDR64:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
if (r_symndx >= symtab_hdr->sh_info)
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs **pp;
struct ppc_dyn_relocs *p;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
eh = (struct ppc_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
if (p->sec == sec)
{
p->count -= 1;
if (p->count == 0)
*pp = p->next;
break;
}
}
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;
{
struct ppc_link_hash_table *htab;
struct ppc_link_hash_entry * eh;
struct ppc_dyn_relocs *p;
asection *s;
unsigned int power_of_two;
htab = ppc_hash_table (info);
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later. */
if (h->type == STT_FUNC
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
{
struct elf_link_hash_entry *fdh;
/* If it's a function entry point, the name starts with a dot
unless someone has written some poor assembly code. The ABI
for .plt calls requires that there be a function descriptor
sym which has the name of the function minus the dot. */
if (h->plt.refcount <= 0
|| h->root.root.string[0] != '.'
|| h->root.root.string[1] == '\0'
|| (! info->shared
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
{
/* This case can occur if we saw a PLT reloc in an input
file, but the symbol was never referred to by a dynamic
object, or if all references were garbage collected. In
such a case, we don't actually need to build a procedure
linkage table entry. */
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
return true;
}
/* Find the corresponding function descriptor symbol. Create it
as undefined if necessary. ppc_elf64_finish_dynamic_symbol
will look it up again and create a JMP_SLOT reloc for it. */
fdh = elf_link_hash_lookup (elf_hash_table (info),
h->root.root.string + 1,
false, false, false);
if (fdh == NULL)
{
asymbol *newsym;
/* Create it as undefined. */
newsym = bfd_make_empty_symbol (htab->elf.dynobj);
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, htab->elf.dynobj, newsym->name, newsym->flags,
newsym->section, newsym->value, NULL, false, false,
(struct bfd_link_hash_entry **) &fdh)))
{
return false;
}
}
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;
/* If there are no references to this symbol that do not use the
GOT, we don't need to generate a copy reloc. */
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
return true;
eh = (struct ppc_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
break;
}
/* If we didn't find any dynamic relocs in read-only sections, then
we'll be keeping the dynamic relocs and avoiding the copy reloc. */
if (p == NULL)
{
h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
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. */
/* 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)
{
htab->srelbss->_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 = htab->sdynbss;
s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
{
if (! bfd_set_section_alignment (htab->elf.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;
}
/* This is the condition under which ppc64_elf_finish_dynamic_symbol
will be called from elflink.h. If elflink.h doesn't call our
finish_dynamic_symbol routine, we'll need to do something about
initializing any .plt and .got entries in ppc64_elf_relocate_section. */
#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
((DYN) \
&& ((INFO)->shared \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
&& ((H)->dynindx != -1 \
|| ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
/* Allocate space in .plt, .got and associated reloc sections for
dynamic relocs. */
static boolean
allocate_dynrelocs (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct bfd_link_info *info;
struct ppc_link_hash_table *htab;
asection *s;
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
if (h->root.type == bfd_link_hash_indirect
|| h->root.type == bfd_link_hash_warning)
return true;
info = (struct bfd_link_info *) inf;
htab = ppc_hash_table (info);
if (htab->elf.dynamic_sections_created
&& h->plt.refcount > 0)
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
{
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
return false;
}
BFD_ASSERT (h->root.root.string[0] == '.'
&& h->root.root.string[1] != '\0');
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
{
/* Make sure the corresponding function descriptor symbol is
dynamic too. */
if (h->dynindx != -1)
{
struct elf_link_hash_entry *fdh;
fdh = elf_link_hash_lookup (elf_hash_table (info),
h->root.root.string + 1,
false, false, false);
if (fdh == NULL)
abort ();
if (fdh->dynindx == -1
&& (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
{
if (! bfd_elf64_link_record_dynamic_symbol (info, fdh))
return false;
}
}
/* If this is the first .plt entry, make room for the special
first entry. */
s = htab->splt;
if (s->_raw_size == 0)
s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
h->plt.offset = s->_raw_size;
/* Make room for this entry. */
s->_raw_size += PLT_ENTRY_SIZE;
/* Point the function at the linkage stub. This works because
the only references to the function code sym are calls.
Function pointer comparisons use the function descriptor. */
s = htab->sglink;
h->root.type = bfd_link_hash_defined;
h->root.u.def.section = s;
h->root.u.def.value = s->_raw_size;
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
/* Make room for global linkage code in .glink. */
s->_raw_size += PPC64_ELF_GLINK_SIZE;
/* We also need to make an entry in the .rela.plt section. */
s = htab->srelplt;
s->_raw_size += sizeof (Elf64_External_Rela);
}
else
{
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
}
else
{
h->plt.offset = (bfd_vma) -1;
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
if (h->got.refcount > 0)
{
boolean dyn;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
{
if (! bfd_elf64_link_record_dynamic_symbol (info, h))
return false;
}
s = htab->sgot;
h->got.offset = s->_raw_size;
s->_raw_size += 8;
dyn = htab->elf.dynamic_sections_created;
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
}
else
h->got.offset = (bfd_vma) -1;
eh = (struct ppc_link_hash_entry *) h;
if (eh->dyn_relocs == NULL)
return true;
/* In the shared -Bsymbolic case, discard space allocated for
dynamic pc-relative relocs against symbols which turn out to be
defined in regular objects. For the normal shared case, discard
space for relocs that have become local due to symbol visibility
changes. */
if (info->shared)
{
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
&& ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
|| info->symbolic))
{
struct ppc_dyn_relocs **pp;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
p->count -= p->pc_count;
p->pc_count = 0;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
}
}
else
{
/* For the non-shared case, discard space for relocs against
symbols which turn out to need copy relocs or are not
dynamic. */
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
&& (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|| (htab->elf.dynamic_sections_created
&& (h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined))))
{
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
if (h->dynindx == -1
&& (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
{
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return false;
}
/* If that succeeded, we know we'll be keeping all the
relocs. */
if (h->dynindx != -1)
goto keep;
}
eh->dyn_relocs = NULL;
keep:
}
/* Finally, allocate space. */
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *sreloc = elf_section_data (p->sec)->sreloc;
sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela);
}
return true;
}
/* Find any dynamic relocs that apply to read-only sections. */
static boolean
readonly_dynrelocs (h, inf)
struct elf_link_hash_entry *h;
PTR inf;
{
struct ppc_link_hash_entry *eh;
struct ppc_dyn_relocs *p;
eh = (struct ppc_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
asection *s = p->sec->output_section;
if (s != NULL && (s->flags & SEC_READONLY) != 0)
{
struct bfd_link_info *info = (struct bfd_link_info *) inf;
info->flags |= DF_TEXTREL;
/* Not an error, just cut short the traversal. */
return false;
}
}
return true;
}
/* Set the sizes of the dynamic sections. */
static boolean
ppc64_elf_size_dynamic_sections (output_bfd, info)
bfd *output_bfd ATTRIBUTE_UNUSED;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
asection *s;
boolean relocs;
bfd *ibfd;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
if (dynobj == NULL)
abort ();
if (htab->elf.dynamic_sections_created)
{
/* Set the contents of the .interp section to the interpreter. */
if (! info->shared)
{
s = bfd_get_section_by_name (dynobj, ".interp");
if (s == NULL)
abort ();
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
continue;
for (s = ibfd->sections; s != NULL; s = s->next)
{
bfd_size_type count = elf_section_data (s)->local_dynrel;
if (count != 0)
{
srel = elf_section_data (s)->sreloc;
srel->_raw_size += count * sizeof (Elf64_External_Rela);
}
}
local_got = elf_local_got_refcounts (ibfd);
if (!local_got)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
s = htab->sgot;
srel = htab->srelgot;
for (; local_got < end_local_got; ++local_got)
{
if (*local_got > 0)
{
*local_got = s->_raw_size;
s->_raw_size += 8;
if (info->shared)
srel->_raw_size += sizeof (Elf64_External_Rela);
}
else
*local_got = (bfd_vma) -1;
}
}
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
relocs = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
if (s == htab->splt
|| s == htab->sgot
|| s == htab->sglink)
{
/* Strip this section if we don't need it; see the
comment below. */
}
else if (strncmp (bfd_get_section_name (dynobj, s), ".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. */
}
else
{
if (s != htab->srelplt)
relocs = 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
{
/* It's not one of our sections, so don't allocate space. */
continue;
}
if (s->_raw_size == 0)
{
_bfd_strip_section_from_output (info, s);
continue;
}
/* Allocate memory for the section contents. We use bfd_zalloc
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does, we get a R_PPC64_NONE reloc instead
of garbage. */
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
if (s->contents == NULL)
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. */
#define add_dynamic_entry(TAG, VAL) \
bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
if (!info->shared)
{
if (!add_dynamic_entry (DT_DEBUG, 0))
return false;
}
if (htab->splt->_raw_size != 0)
{
if (!add_dynamic_entry (DT_PLTGOT, 0)
|| !add_dynamic_entry (DT_PLTRELSZ, 0)
|| !add_dynamic_entry (DT_PLTREL, DT_RELA)
|| !add_dynamic_entry (DT_JMPREL, 0))
return false;
}
if (relocs)
{
if (!add_dynamic_entry (DT_RELA, 0)
|| !add_dynamic_entry (DT_RELASZ, 0)
|| !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
return false;
/* If any dynamic relocs apply to a read-only section,
then we need a DT_TEXTREL entry. */
elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (PTR) info);
if ((info->flags & DF_TEXTREL) != 0)
{
if (!add_dynamic_entry (DT_TEXTREL, 0))
return false;
}
}
}
#undef add_dynamic_entry
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 ELF backend linker to do all the work. */
return bfd_elf64_bfd_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;
{
struct ppc_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
bfd_vma *local_got_offsets;
bfd_vma TOCstart;
boolean ret = true;
/* Initialize howto table if needed. */
if (!ppc64_elf_howto_table[R_PPC64_ADDR32])
ppc_howto_init ();
htab = ppc_hash_table (info);
local_got_offsets = elf_local_got_offsets (input_bfd);
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;
unsigned long r_symndx;
bfd_vma relocation;
boolean unresolved_reloc;
long insn;
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info);
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];
rel->r_addend += sec->output_offset + sym->st_value;
}
}
continue;
}
/* This is a final link. */
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;
unresolved_reloc = false;
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;
relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
if (sec->output_section == NULL)
/* Set a flag that will be cleared later if we find a
relocation value for this symbol. output_section
is typically NULL for symbols satisfied by a shared
library. */
unresolved_reloc = true;
else
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
;
else if (info->shared
&& (!info->symbolic || info->allow_shlib_undefined)
&& !info->no_undefined
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
offset, (!info->shared
|| info->no_undefined
|| ELF_ST_VISIBILITY (h->other)))))
return false;
relocation = 0;
}
}
/* First handle relocations that tweak non-addend part of insn. */
switch (r_type)
{
default:
break;
/* Branch taken prediction relocations. */
case R_PPC64_ADDR14_BRTAKEN:
case 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, (bfd_vma) insn, contents + offset);
break;
/* Branch not taken predicition relocations. */
case R_PPC64_ADDR14_BRNTAKEN:
case 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, (bfd_vma) insn, contents + offset);
break;
case R_PPC64_REL24:
case R_PPC64_ADDR24:
/* An ADDR24 or REL24 branching to a linkage function may be
followed by a nop that we have to replace with a 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. */
&& offset + 8 <= input_section->_cooked_size)
{
bfd_byte *pnext;
pnext = contents + offset + 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,
(bfd_vma) 0xe8410028, /* ld r2,40(r1) */
pnext);
}
}
break;
}
/* Set `addend'. */
switch (r_type)
{
default:
(*_bfd_error_handler)
(_("%s: unknown relocation type %d for symbol %s"),
bfd_archive_filename (input_bfd), (int) r_type, sym_name);
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
case R_PPC64_NONE:
case R_PPC_GNU_VTINHERIT:
case R_PPC_GNU_VTENTRY:
continue;
/* 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. */
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:
{
/* Relocation is to the entry for this symbol in the global
offset table. */
bfd_vma off;
if (htab->sgot == NULL)
abort ();
if (h != NULL)
{
boolean dyn;
off = h->got.offset;
dyn = htab->elf.dynamic_sections_created;
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|| (info->shared
&& (info->symbolic
|| h->dynindx == -1
|| (h->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL))
&& (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, or the symbol was forced to be local
because of a version file. We must initialize
this entry in the global offset table. Since the
offset must always be a multiple of 8, we use the
least significant bit to record whether we have
initialized it already.
When doing a dynamic link, we create a .rel.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,
htab->sgot->contents + off);
h->got.offset |= 1;
}
}
else
unresolved_reloc = false;
}
else
{
if (local_got_offsets == NULL)
abort ();
off = local_got_offsets[r_symndx];
/* The offset must always be a multiple of 8. 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,
htab->sgot->contents + off);
if (info->shared)
{
Elf_Internal_Rela outrel;
Elf64_External_Rela *loc;
/* We need to generate a R_PPC64_RELATIVE reloc
for the dynamic linker. */
outrel.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset
+ off);
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
outrel.r_addend = relocation;
loc = (Elf64_External_Rela *) htab->srelgot->contents;
loc += htab->srelgot->reloc_count++;
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
}
local_got_offsets[r_symndx] |= 1;
}
}
if (off >= (bfd_vma) -2)
abort ();
relocation = htab->sgot->output_offset + off;
/* TOC base (r2) is TOC start plus 0x8000. */
addend -= TOC_BASE_OFF;
}
break;
case R_PPC64_PLT16_HA:
case R_PPC64_PLT16_HI:
case R_PPC64_PLT16_LO:
case R_PPC64_PLT32:
case R_PPC64_PLT64:
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
/* Resolve a PLT reloc against a local symbol directly,
without using the procedure linkage table. */
if (h == NULL)
break;
if (h->plt.offset == (bfd_vma) -1
|| htab->splt == NULL)
{
/* We didn't make a PLT entry for this symbol. This
happens when statically linking PIC code, or when
using -Bsymbolic. */
break;
}
relocation = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ h->plt.offset);
unresolved_reloc = false;
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 R_PPC64_TOC16:
case R_PPC64_TOC16_LO:
case R_PPC64_TOC16_HI:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_TOC16_HA:
/* Only .got, .toc and *UND* symbols are allowed. */
BFD_ASSERT (sec != (asection *) 0
&& (bfd_is_und_section (sec)
|| strcmp (bfd_get_section_name (abfd, sec),
".toc") == 0
|| strcmp (bfd_get_section_name (abfd, sec),
".got") == 0));
addend -= TOCstart + TOC_BASE_OFF;
break;
/* Relocate against the beginning of the section. */
case R_PPC64_SECTOFF:
case R_PPC64_SECTOFF_LO:
case R_PPC64_SECTOFF_HI:
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_SECTOFF_HA:
if (sec != (asection *) 0)
addend -= sec->output_section->vma;
break;
/* Relocations that may need to be propagated if this is a
dynamic object. */
case R_PPC64_REL14:
case R_PPC64_REL14_BRNTAKEN:
case R_PPC64_REL14_BRTAKEN:
case R_PPC64_REL24:
case R_PPC64_REL32:
case R_PPC64_REL64:
case R_PPC64_ADDR14:
case R_PPC64_ADDR14_BRNTAKEN:
case R_PPC64_ADDR14_BRTAKEN:
case R_PPC64_ADDR16:
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HI:
case R_PPC64_ADDR16_HIGHER:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHEST:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_ADDR16_LO:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_ADDR24:
case R_PPC64_ADDR30:
case R_PPC64_ADDR32:
case R_PPC64_ADDR64:
case R_PPC64_UADDR16:
case R_PPC64_UADDR32:
case R_PPC64_UADDR64:
case R_PPC64_TOC:
if ((info->shared
&& (input_section->flags & SEC_ALLOC) != 0
&& (IS_ABSOLUTE_RELOC (r_type)
|| (h != NULL
&& h->dynindx != -1
&& (! info->symbolic
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))))
|| (!info->shared
&& (input_section->flags & SEC_ALLOC) != 0
&& h != NULL
&& h->dynindx != -1
&& (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
&& (((h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
&& (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|| h->root.type == bfd_link_hash_undefweak
|| h->root.type == bfd_link_hash_undefined)))
{
Elf_Internal_Rela outrel;
boolean skip, relocate;
asection *sreloc;
Elf64_External_Rela *loc;
/* When generating a dynamic object, these relocations
are copied into the output file to be resolved at run
time. */
skip = false;
if (elf_section_data (input_section)->stab_info == NULL)
outrel.r_offset = offset;
else
{
bfd_vma off;
off = (_bfd_stab_section_offset
(output_bfd, htab->elf.stab_info, input_section,
&elf_section_data (input_section)->stab_info,
offset));
if (off == (bfd_vma) -1)
skip = true;
outrel.r_offset = off;
}
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
outrel.r_addend = addend;
if (skip)
{
relocate = false;
memset (&outrel, 0, sizeof outrel);
}
else if (h != NULL
&& h->dynindx != -1
&& (!IS_ABSOLUTE_RELOC (r_type)
|| !info->shared
|| !info->symbolic
|| (h->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR) == 0))
{
relocate = false;
outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
}
else
{
/* This symbol is local, or marked to become local. */
outrel.r_addend += relocation;
relocate = true;
if (r_type == R_PPC64_ADDR64)
{
outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE);
}
else
{
long indx = 0;
if (r_type == R_PPC64_TOC || bfd_is_abs_section (sec))
;
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;
/* We are turning this relocation into one
against a section symbol, so subtract out
the output section's address but not the
offset of the input section in the output
section. */
outrel.r_addend -= osec->vma;
}
outrel.r_info = ELF64_R_INFO (indx, r_type);
}
}
sreloc = elf_section_data (input_section)->sreloc;
if (sreloc == NULL)
abort ();
loc = (Elf64_External_Rela *) sreloc->contents;
loc += sreloc->reloc_count++;
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
/* If this reloc is against an external symbol, it will
be computed at runtime, so there's no need to do
anything now. */
if (! relocate)
continue;
}
break;
case R_PPC64_COPY:
case R_PPC64_GLOB_DAT:
case R_PPC64_JMP_SLOT:
case R_PPC64_RELATIVE:
/* We shouldn't ever see these dynamic relocs in relocatable
files. */
/* Fall thru */
case R_PPC64_PLTGOT16:
case R_PPC64_PLTGOT16_DS:
case R_PPC64_PLTGOT16_HA:
case R_PPC64_PLTGOT16_HI:
case R_PPC64_PLTGOT16_LO:
case R_PPC64_PLTGOT16_LO_DS:
case R_PPC64_PLTREL32:
case R_PPC64_PLTREL64:
/* These ones haven't been implemented yet. */
(*_bfd_error_handler)
(_("%s: Relocation %s is not supported for symbol %s."),
bfd_archive_filename (input_bfd),
ppc64_elf_howto_table[(int) r_type]->name, sym_name);
bfd_set_error (bfd_error_invalid_operation);
ret = false;
continue;
}
/* Do any further special processing. */
switch (r_type)
{
default:
break;
case R_PPC64_ADDR16_HA:
case R_PPC64_ADDR16_HIGHERA:
case R_PPC64_ADDR16_HIGHESTA:
case R_PPC64_PLT16_HA:
case R_PPC64_TOC16_HA:
case R_PPC64_SECTOFF_HA:
/* 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). */
if (sec != NULL)
/* Add 0x10000 if sign bit in 0:15 is set. */
addend += ((relocation + addend) & 0x8000) << 1;
break;
case R_PPC64_ADDR16_DS:
case R_PPC64_ADDR16_LO_DS:
case R_PPC64_GOT16_DS:
case R_PPC64_GOT16_LO_DS:
case R_PPC64_PLT16_LO_DS:
case R_PPC64_SECTOFF_DS:
case R_PPC64_SECTOFF_LO_DS:
case R_PPC64_TOC16_DS:
case R_PPC64_TOC16_LO_DS:
case R_PPC64_PLTGOT16_DS:
case R_PPC64_PLTGOT16_LO_DS:
if (((relocation + addend) & 3) != 0)
{
(*_bfd_error_handler)
(_("%s: error: relocation %s not a multiple of 4"),
bfd_archive_filename (input_bfd),
ppc64_elf_howto_table[(int) r_type]->name);
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
}
break;
}
/* FIXME: Why do we allow debugging sections to escape this error?
More importantly, why do we not emit dynamic relocs above in
debugging sections (which are ! SEC_ALLOC)? If we had
emitted the dynamic reloc, we could remove the fudge here. */
if (unresolved_reloc
&& !(info->shared
&& (input_section->flags & SEC_DEBUGGING) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
(*_bfd_error_handler)
(_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
bfd_archive_filename (input_bfd),
bfd_get_section_name (input_bfd, input_section),
(long) rel->r_offset,
h->root.root.string);
r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type],
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
&& ppc64_elf_howto_table[(int) r_type]->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, ppc64_elf_howto_table[(int) r_type]->name,
(bfd_vma) 0, input_bfd, input_section, offset)))
return false;
}
else
ret = false;
}
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;
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
if (h->plt.offset != (bfd_vma) -1)
{
struct elf_link_hash_entry *funcdesc_h;
Elf_Internal_Rela rela;
Elf64_External_Rela *loc;
/* This symbol has an entry in the procedure linkage table. Set
it up. */
if (h->dynindx == -1
|| htab->splt == NULL
|| htab->srelplt == NULL
|| htab->sglink == NULL
|| h->root.root.string[0] != '.'
|| h->root.root.string[1] == '\0')
abort ();
/* Find its corresponding function descriptor.
ppc64_elf_adjust_dynamic_symbol has already set it up for us. */
funcdesc_h = elf_link_hash_lookup (elf_hash_table (info),
h->root.root.string + 1,
false, false, false);
if (funcdesc_h == NULL || funcdesc_h->dynindx == -1)
abort ();
/* Create a JMP_SLOT reloc to inform the dynamic linker to
fill in the PLT entry. */
rela.r_offset = (htab->splt->output_section->vma
+ htab->splt->output_offset
+ h->plt.offset);
rela.r_info = ELF64_R_INFO (funcdesc_h->dynindx, R_PPC64_JMP_SLOT);
rela.r_addend = 0;
loc = (Elf64_External_Rela *) htab->srelplt->contents;
loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE;
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
/* We need to create a linkage function. */
if (h->root.u.def.section == htab->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 = htab->splt->output_section->vma
+ htab->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, (bfd_vma) *stub, p);
}
}
else
abort ();
}
if (h->got.offset != (bfd_vma) -1)
{
Elf_Internal_Rela rela;
Elf64_External_Rela *loc;
/* This symbol has an entry in the global offset table. Set it
up. */
if (htab->sgot == NULL || htab->srelgot == NULL)
abort ();
rela.r_offset = (htab->sgot->output_section->vma
+ htab->sgot->output_offset
+ (h->got.offset &~ (bfd_vma) 1));
/* If this is a static link, or it is a -Bsymbolic link and the
symbol is defined locally or was forced to be local because
of a version file, 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_FORCED_LOCAL))
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
{
BFD_ASSERT((h->got.offset & 1) != 0);
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,
htab->sgot->contents + h->got.offset);
rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT);
rela.r_addend = 0;
}
loc = (Elf64_External_Rela *) htab->srelgot->contents;
loc += htab->srelgot->reloc_count++;
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
{
Elf_Internal_Rela rela;
Elf64_External_Rela *loc;
/* This symbol needs a copy reloc. Set it up. */
if (h->dynindx == -1
|| (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
|| htab->srelbss == NULL)
abort ();
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;
loc = (Elf64_External_Rela *) htab->srelbss->contents;
loc += htab->srelbss->reloc_count++;
bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
}
/* Mark some specially defined symbols as absolute. */
if (strcmp (h->root.root.string, "_DYNAMIC") == 0)
sym->st_shndx = SHN_ABS;
return true;
}
/* Used to decide how to sort relocs in an optimal manner for the
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
ppc64_elf_reloc_type_class (rela)
const Elf_Internal_Rela *rela;
{
enum elf_ppc_reloc_type r_type;
r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rela->r_info);
switch (r_type)
{
case R_PPC64_RELATIVE:
return reloc_class_relative;
case R_PPC64_JMP_SLOT:
return reloc_class_plt;
case R_PPC64_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
/* Finish up the dynamic sections. */
static boolean
ppc64_elf_finish_dynamic_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
struct ppc_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
htab = ppc_hash_table (info);
dynobj = htab->elf.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
Elf64_External_Dyn *dyncon, *dynconend;
if (sdyn == NULL || htab->sgot == NULL)
abort ();
dyncon = (Elf64_External_Dyn *) sdyn->contents;
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
continue;
case DT_PLTGOT:
dyn.d_un.d_ptr = htab->splt->output_section->vma;
break;
case DT_JMPREL:
dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
break;
case DT_PLTRELSZ:
if (htab->srelplt->output_section->_cooked_size != 0)
dyn.d_un.d_val = htab->srelplt->output_section->_cooked_size;
else
dyn.d_un.d_val = htab->srelplt->output_section->_raw_size;
break;
}
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
}
}
return true;
}
#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec
#define TARGET_LITTLE_NAME "elf64-powerpcle"
#define TARGET_BIG_SYM bfd_elf64_powerpc_vec
#define TARGET_BIG_NAME "elf64-powerpc"
#define ELF_ARCH bfd_arch_powerpc
#define ELF_MACHINE_CODE EM_PPC64
#define ELF_MAXPAGESIZE 0x10000
#define elf_info_to_howto ppc64_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
#endif
#ifdef EM_PPC_OLD
#define ELF_MACHINE_ALT2 EM_PPC_OLD
#endif
#define elf_backend_want_got_sym 0
#define elf_backend_want_plt_sym 0
#define elf_backend_plt_alignment 3
#define elf_backend_plt_not_loaded 1
#define elf_backend_got_symbol_offset 0
#define elf_backend_got_header_size 0
#define elf_backend_can_gc_sections 1
#define elf_backend_can_refcount 1
#define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE
#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_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_link_hash_table_create ppc64_elf_link_hash_table_create
#define bfd_elf64_bfd_final_link ppc64_elf_final_link
#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr
#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections
#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol
#define elf_backend_check_relocs ppc64_elf_check_relocs
#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_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol
#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections
#define elf_backend_fake_sections ppc64_elf_fake_sections
#define elf_backend_relocate_section ppc64_elf_relocate_section
#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol
#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class
#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections
#include "elf64-target.h"
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