4440 lines
135 KiB
C
4440 lines
135 KiB
C
/* CRIS-specific support for 32-bit ELF.
|
||
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
|
||
2010 Free Software Foundation, Inc.
|
||
Contributed by Axis Communications AB.
|
||
Written by Hans-Peter Nilsson, based on elf32-fr30.c
|
||
PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
|
||
|
||
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
|
||
MA 02110-1301, USA. */
|
||
|
||
#include "sysdep.h"
|
||
#include "bfd.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
#include "elf/cris.h"
|
||
#include <limits.h>
|
||
|
||
/* Forward declarations. */
|
||
static reloc_howto_type * cris_reloc_type_lookup
|
||
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
|
||
|
||
static void cris_info_to_howto_rela
|
||
PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
|
||
|
||
static bfd_reloc_status_type cris_elf_pcrel_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
||
|
||
static bfd_boolean cris_elf_grok_prstatus
|
||
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
|
||
|
||
static bfd_boolean cris_elf_grok_psinfo
|
||
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
|
||
|
||
static bfd_boolean cris_elf_relocate_section
|
||
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
|
||
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
|
||
|
||
static bfd_reloc_status_type cris_final_link_relocate
|
||
PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
|
||
Elf_Internal_Rela *, bfd_vma));
|
||
|
||
static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
|
||
|
||
static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
|
||
|
||
static bfd_boolean cris_elf_set_mach_from_flags
|
||
PARAMS ((bfd *, unsigned long int));
|
||
|
||
static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
|
||
|
||
static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
|
||
static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
|
||
|
||
struct elf_cris_link_hash_entry;
|
||
static bfd_boolean elf_cris_discard_excess_dso_dynamics
|
||
PARAMS ((struct elf_cris_link_hash_entry *, PTR));
|
||
static bfd_boolean elf_cris_discard_excess_program_dynamics
|
||
PARAMS ((struct elf_cris_link_hash_entry *, PTR));
|
||
static bfd_boolean elf_cris_adjust_gotplt_to_got
|
||
PARAMS ((struct elf_cris_link_hash_entry *, PTR));
|
||
static bfd_boolean elf_cris_try_fold_plt_to_got
|
||
PARAMS ((struct elf_cris_link_hash_entry *, PTR));
|
||
static struct bfd_hash_entry *elf_cris_link_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static struct bfd_link_hash_table *elf_cris_link_hash_table_create
|
||
PARAMS ((bfd *));
|
||
static bfd_boolean elf_cris_adjust_dynamic_symbol
|
||
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
|
||
static bfd_boolean cris_elf_check_relocs
|
||
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
||
const Elf_Internal_Rela *));
|
||
|
||
static bfd_boolean elf_cris_size_dynamic_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static bfd_boolean elf_cris_finish_dynamic_symbol
|
||
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
|
||
Elf_Internal_Sym *));
|
||
static bfd_boolean elf_cris_finish_dynamic_sections
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static void elf_cris_hide_symbol
|
||
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
|
||
static enum elf_reloc_type_class elf_cris_reloc_type_class
|
||
PARAMS ((const Elf_Internal_Rela *));
|
||
|
||
static reloc_howto_type cris_elf_howto_table [] =
|
||
{
|
||
/* This reloc does nothing. */
|
||
HOWTO (R_CRIS_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_CRIS_NONE", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* An 8 bit absolute relocation. */
|
||
HOWTO (R_CRIS_8, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_CRIS_8", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0x00ff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 16 bit absolute relocation. */
|
||
HOWTO (R_CRIS_16, /* 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_CRIS_16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32 bit absolute relocation. */
|
||
HOWTO (R_CRIS_32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
/* We don't want overflow complaints for 64-bit vma builds
|
||
for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
|
||
32-bit ELF) where sym=0xc0001234.
|
||
Don't do this for the PIC relocs, as we don't expect to
|
||
see them with large offsets. */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_CRIS_32", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* An 8 bit PC-relative relocation. */
|
||
HOWTO (R_CRIS_8_PCREL, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
cris_elf_pcrel_reloc, /* special_function */
|
||
"R_CRIS_8_PCREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0x00ff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 16 bit PC-relative relocation. */
|
||
HOWTO (R_CRIS_16_PCREL, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
cris_elf_pcrel_reloc, /* special_function */
|
||
"R_CRIS_16_PCREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* A 32 bit PC-relative relocation. */
|
||
HOWTO (R_CRIS_32_PCREL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
cris_elf_pcrel_reloc, /* special_function */
|
||
"R_CRIS_32_PCREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy. */
|
||
HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_CRIS_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_CRIS_GNU_VTENTRY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
||
"R_CRIS_GNU_VTENTRY", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* 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_CRIS_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_CRIS_COPY", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Like R_CRIS_32, but used when setting global offset table entries. */
|
||
HOWTO (R_CRIS_GLOB_DAT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_CRIS_GLOB_DAT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Marks a procedure linkage table entry for a symbol. */
|
||
HOWTO (R_CRIS_JUMP_SLOT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_CRIS_JUMP_SLOT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Used only by the dynamic linker. When the object is run, this
|
||
longword is set to the load address of the object, plus the
|
||
addend. */
|
||
HOWTO (R_CRIS_RELATIVE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_CRIS_RELATIVE", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Like R_CRIS_32, but referring to the GOT table entry for the symbol. */
|
||
HOWTO (R_CRIS_16_GOT, /* 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_CRIS_16_GOT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
HOWTO (R_CRIS_32_GOT, /* 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_CRIS_32_GOT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
|
||
the GOT table for the symbol. */
|
||
HOWTO (R_CRIS_16_GOTPLT, /* 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_CRIS_16_GOTPLT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
HOWTO (R_CRIS_32_GOTPLT, /* 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_CRIS_32_GOTPLT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
|
||
be necessary. */
|
||
HOWTO (R_CRIS_32_GOTREL, /* 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_CRIS_32_GOTREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32-bit offset from GOT to entry for this symbol in PLT and request
|
||
to create PLT entry for symbol. */
|
||
HOWTO (R_CRIS_32_PLT_GOTREL, /* 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_CRIS_32_PLT_GOTREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32-bit offset from PC (location after the relocation) + addend to
|
||
entry for this symbol in PLT and request to create PLT entry for
|
||
symbol. */
|
||
HOWTO (R_CRIS_32_PLT_PCREL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
TRUE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
cris_elf_pcrel_reloc, /* special_function */
|
||
"R_CRIS_32_PLT_PCREL", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* We don't handle these in any special manner and cross-format
|
||
linking is not supported; just recognize them enough to pass them
|
||
around. FIXME: do the same for most PIC relocs and add sanity
|
||
tests to actually refuse gracefully to handle these and PIC
|
||
relocs for cross-format linking. */
|
||
#define TLSHOWTO32(name) \
|
||
HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
|
||
bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
|
||
#define TLSHOWTO16X(name, X) \
|
||
HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
|
||
bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
|
||
#define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
|
||
#define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
|
||
|
||
TLSHOWTO32 (R_CRIS_32_GOT_GD),
|
||
TLSHOWTO16 (R_CRIS_16_GOT_GD),
|
||
TLSHOWTO32 (R_CRIS_32_GD),
|
||
TLSHOWTO32 (R_CRIS_DTP),
|
||
TLSHOWTO32 (R_CRIS_32_DTPREL),
|
||
TLSHOWTO16S (R_CRIS_16_DTPREL),
|
||
TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
|
||
TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
|
||
TLSHOWTO32 (R_CRIS_32_TPREL),
|
||
TLSHOWTO16S (R_CRIS_16_TPREL),
|
||
TLSHOWTO32 (R_CRIS_DTPMOD),
|
||
TLSHOWTO32 (R_CRIS_32_IE)
|
||
};
|
||
|
||
/* Map BFD reloc types to CRIS ELF reloc types. */
|
||
|
||
struct cris_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned int cris_reloc_val;
|
||
};
|
||
|
||
static const struct cris_reloc_map cris_reloc_map [] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_CRIS_NONE },
|
||
{ BFD_RELOC_8, R_CRIS_8 },
|
||
{ BFD_RELOC_16, R_CRIS_16 },
|
||
{ BFD_RELOC_32, R_CRIS_32 },
|
||
{ BFD_RELOC_8_PCREL, R_CRIS_8_PCREL },
|
||
{ BFD_RELOC_16_PCREL, R_CRIS_16_PCREL },
|
||
{ BFD_RELOC_32_PCREL, R_CRIS_32_PCREL },
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY },
|
||
{ BFD_RELOC_CRIS_COPY, R_CRIS_COPY },
|
||
{ BFD_RELOC_CRIS_GLOB_DAT, R_CRIS_GLOB_DAT },
|
||
{ BFD_RELOC_CRIS_JUMP_SLOT, R_CRIS_JUMP_SLOT },
|
||
{ BFD_RELOC_CRIS_RELATIVE, R_CRIS_RELATIVE },
|
||
{ BFD_RELOC_CRIS_16_GOT, R_CRIS_16_GOT },
|
||
{ BFD_RELOC_CRIS_32_GOT, R_CRIS_32_GOT },
|
||
{ BFD_RELOC_CRIS_16_GOTPLT, R_CRIS_16_GOTPLT },
|
||
{ BFD_RELOC_CRIS_32_GOTPLT, R_CRIS_32_GOTPLT },
|
||
{ BFD_RELOC_CRIS_32_GOTREL, R_CRIS_32_GOTREL },
|
||
{ BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
|
||
{ BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
|
||
{ BFD_RELOC_CRIS_32_GOT_GD, R_CRIS_32_GOT_GD },
|
||
{ BFD_RELOC_CRIS_16_GOT_GD, R_CRIS_16_GOT_GD },
|
||
{ BFD_RELOC_CRIS_32_GD, R_CRIS_32_GD },
|
||
{ BFD_RELOC_CRIS_DTP, R_CRIS_DTP },
|
||
{ BFD_RELOC_CRIS_32_DTPREL, R_CRIS_32_DTPREL },
|
||
{ BFD_RELOC_CRIS_16_DTPREL, R_CRIS_16_DTPREL },
|
||
{ BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
|
||
{ BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
|
||
{ BFD_RELOC_CRIS_32_TPREL, R_CRIS_32_TPREL },
|
||
{ BFD_RELOC_CRIS_16_TPREL, R_CRIS_16_TPREL },
|
||
{ BFD_RELOC_CRIS_DTPMOD, R_CRIS_DTPMOD },
|
||
{ BFD_RELOC_CRIS_32_IE, R_CRIS_32_IE }
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
cris_reloc_type_lookup (abfd, code)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
|
||
if (cris_reloc_map [i].bfd_reloc_val == code)
|
||
return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
|
||
i++)
|
||
if (cris_elf_howto_table[i].name != NULL
|
||
&& strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
|
||
return &cris_elf_howto_table[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for an CRIS ELF reloc. */
|
||
|
||
static void
|
||
cris_info_to_howto_rela (abfd, cache_ptr, dst)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
arelent * cache_ptr;
|
||
Elf_Internal_Rela * dst;
|
||
{
|
||
enum elf_cris_reloc_type r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
|
||
cache_ptr->howto = & cris_elf_howto_table [r_type];
|
||
}
|
||
|
||
bfd_reloc_status_type
|
||
cris_elf_pcrel_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;
|
||
{
|
||
/* By default (using only bfd_elf_generic_reloc when linking to
|
||
non-ELF formats) PC-relative relocs are relative to the beginning
|
||
of the reloc. CRIS PC-relative relocs are relative to the position
|
||
*after* the reloc because that's what pre-CRISv32 PC points to
|
||
after reading an insn field with that reloc. (For CRISv32, PC is
|
||
actually relative to the start of the insn, but we keep the old
|
||
definition.) Still, we use as much generic machinery as we can.
|
||
|
||
Only adjust when doing a final link. */
|
||
if (output_bfd == (bfd *) NULL)
|
||
reloc_entry->addend -= 1 << reloc_entry->howto->size;
|
||
|
||
return
|
||
bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
}
|
||
|
||
/* Support for core dump NOTE sections.
|
||
The slightly unintuitive code layout is an attempt to keep at least
|
||
some similarities with other ports, hoping to simplify general
|
||
changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_grok_prstatus (abfd, note)
|
||
bfd *abfd;
|
||
Elf_Internal_Note *note;
|
||
{
|
||
int offset;
|
||
size_t size;
|
||
|
||
if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 202: /* Linux/CRISv32 */
|
||
/* pr_cursig */
|
||
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
|
||
|
||
/* pr_pid */
|
||
elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
|
||
|
||
/* pr_reg */
|
||
offset = 70;
|
||
size = 128;
|
||
|
||
break;
|
||
}
|
||
else
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 214: /* Linux/CRIS */
|
||
/* pr_cursig */
|
||
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
|
||
|
||
/* pr_pid */
|
||
elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 22);
|
||
|
||
/* pr_reg */
|
||
offset = 70;
|
||
size = 140;
|
||
|
||
break;
|
||
}
|
||
|
||
/* Make a ".reg/999" section. */
|
||
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
|
||
size, note->descpos + offset);
|
||
}
|
||
|
||
static bfd_boolean
|
||
cris_elf_grok_psinfo (abfd, note)
|
||
bfd *abfd;
|
||
Elf_Internal_Note *note;
|
||
{
|
||
if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 124: /* Linux/CRISv32 elf_prpsinfo */
|
||
elf_tdata (abfd)->core_program
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
|
||
elf_tdata (abfd)->core_command
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
|
||
}
|
||
else
|
||
switch (note->descsz)
|
||
{
|
||
default:
|
||
return FALSE;
|
||
|
||
case 124: /* Linux/CRIS elf_prpsinfo */
|
||
elf_tdata (abfd)->core_program
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
|
||
elf_tdata (abfd)->core_command
|
||
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
|
||
}
|
||
|
||
/* Note that for some reason, a spurious space is tacked
|
||
onto the end of the args in some (at least one anyway)
|
||
implementations, so strip it off if it exists. */
|
||
|
||
{
|
||
char *command = elf_tdata (abfd)->core_command;
|
||
int n = strlen (command);
|
||
|
||
if (0 < n && command[n - 1] == ' ')
|
||
command[n - 1] = '\0';
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* The name of the dynamic interpreter. This is put in the .interp
|
||
section. */
|
||
|
||
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
|
||
|
||
/* The size in bytes of an entry in the procedure linkage table. */
|
||
|
||
#define PLT_ENTRY_SIZE 20
|
||
#define PLT_ENTRY_SIZE_V32 26
|
||
|
||
/* The first entry in an absolute procedure linkage table looks like this. */
|
||
|
||
static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xfc, 0xe1,
|
||
0x7e, 0x7e, /* push mof. */
|
||
0x7f, 0x0d, /* (dip [pc+]) */
|
||
0, 0, 0, 0, /* Replaced with address of .got + 4. */
|
||
0x30, 0x7a, /* move [...],mof */
|
||
0x7f, 0x0d, /* (dip [pc+]) */
|
||
0, 0, 0, 0, /* Replaced with address of .got + 8. */
|
||
0x30, 0x09 /* jump [...] */
|
||
};
|
||
|
||
static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
|
||
{
|
||
0x84, 0xe2, /* subq 4,$sp */
|
||
0x6f, 0xfe, /* move.d 0,$acr */
|
||
0, 0, 0, 0, /* Replaced by address of .got + 4. */
|
||
0x7e, 0x7a, /* move $mof,[$sp] */
|
||
0x3f, 0x7a, /* move [$acr],$mof */
|
||
0x04, 0xf2, /* addq 4,acr */
|
||
0x6f, 0xfa, /* move.d [$acr],$acr */
|
||
0xbf, 0x09, /* jump $acr */
|
||
0xb0, 0x05, /* nop */
|
||
0, 0 /* Pad out to 26 bytes. */
|
||
};
|
||
|
||
/* Subsequent entries in an absolute procedure linkage table look like
|
||
this. */
|
||
|
||
static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x7f, 0x0d, /* (dip [pc+]) */
|
||
0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
|
||
0x30, 0x09, /* jump [...] */
|
||
0x3f, 0x7e, /* move [pc+],mof */
|
||
0, 0, 0, 0, /* Replaced with offset into relocation table. */
|
||
0x2f, 0xfe, /* add.d [pc+],pc */
|
||
0xec, 0xff,
|
||
0xff, 0xff /* Replaced with offset to start of .plt. */
|
||
};
|
||
|
||
static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
|
||
{
|
||
0x6f, 0xfe, /* move.d 0,$acr */
|
||
0, 0, 0, 0, /* Replaced with address of this symbol in .got. */
|
||
0x6f, 0xfa, /* move.d [$acr],$acr */
|
||
0xbf, 0x09, /* jump $acr */
|
||
0xb0, 0x05, /* nop */
|
||
0x3f, 0x7e, /* move 0,mof */
|
||
0, 0, 0, 0, /* Replaced with offset into relocation table. */
|
||
0xbf, 0x0e, /* ba start_of_plt0_entry */
|
||
0, 0, 0, 0, /* Replaced with offset to plt0 entry. */
|
||
0xb0, 0x05 /* nop */
|
||
};
|
||
|
||
/* The first entry in a PIC procedure linkage table looks like this. */
|
||
|
||
static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
|
||
{
|
||
0xfc, 0xe1, 0x7e, 0x7e, /* push mof */
|
||
0x04, 0x01, 0x30, 0x7a, /* move [r0+4],mof */
|
||
0x08, 0x01, 0x30, 0x09, /* jump [r0+8] */
|
||
0, 0, 0, 0, 0, 0, 0, 0, /* Pad out to 20 bytes. */
|
||
};
|
||
|
||
static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
|
||
{
|
||
0x84, 0xe2, /* subq 4,$sp */
|
||
0x04, 0x01, /* addoq 4,$r0,$acr */
|
||
0x7e, 0x7a, /* move $mof,[$sp] */
|
||
0x3f, 0x7a, /* move [$acr],$mof */
|
||
0x04, 0xf2, /* addq 4,$acr */
|
||
0x6f, 0xfa, /* move.d [$acr],$acr */
|
||
0xbf, 0x09, /* jump $acr */
|
||
0xb0, 0x05, /* nop */
|
||
0, 0, /* Pad out to 26 bytes. */
|
||
0, 0, 0, 0,
|
||
0, 0, 0, 0
|
||
};
|
||
|
||
/* Subsequent entries in a PIC procedure linkage table look like this. */
|
||
|
||
static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
|
||
{
|
||
0x6f, 0x0d, /* (bdap [pc+].d,r0) */
|
||
0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
|
||
0x30, 0x09, /* jump [...] */
|
||
0x3f, 0x7e, /* move [pc+],mof */
|
||
0, 0, 0, 0, /* Replaced with offset into relocation table. */
|
||
0x2f, 0xfe, /* add.d [pc+],pc */
|
||
0xec, 0xff, /* Replaced with offset to start of .plt. */
|
||
0xff, 0xff
|
||
};
|
||
|
||
static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
|
||
{
|
||
0x6f, 0x0d, /* addo.d 0,$r0,$acr */
|
||
0, 0, 0, 0, /* Replaced with offset of this symbol in .got. */
|
||
0x6f, 0xfa, /* move.d [$acr],$acr */
|
||
0xbf, 0x09, /* jump $acr */
|
||
0xb0, 0x05, /* nop */
|
||
0x3f, 0x7e, /* move relocoffs,$mof */
|
||
0, 0, 0, 0, /* Replaced with offset into relocation table. */
|
||
0xbf, 0x0e, /* ba start_of_plt */
|
||
0, 0, 0, 0, /* Replaced with offset to start of .plt. */
|
||
0xb0, 0x05 /* nop */
|
||
};
|
||
|
||
/* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
|
||
(and most other PIC/shlib stuff). Check that we don't drift away
|
||
without reason.
|
||
|
||
The CRIS linker, like the m68k and i386 linkers (and probably the rest
|
||
too) needs to keep track of the number of relocs that it decides to
|
||
copy in check_relocs for each symbol. This is so that it can discard
|
||
PC relative relocs if it doesn't need them when linking with
|
||
-Bsymbolic. We store the information in a field extending the regular
|
||
ELF linker hash table. */
|
||
|
||
/* This structure keeps track of the number of PC relative relocs we have
|
||
copied for a given symbol. */
|
||
|
||
struct elf_cris_pcrel_relocs_copied
|
||
{
|
||
/* Next section. */
|
||
struct elf_cris_pcrel_relocs_copied *next;
|
||
|
||
/* A section in dynobj. */
|
||
asection *section;
|
||
|
||
/* Number of relocs copied in this section. */
|
||
bfd_size_type count;
|
||
|
||
/* Example of reloc being copied, for message. */
|
||
enum elf_cris_reloc_type r_type;
|
||
};
|
||
|
||
/* CRIS ELF linker hash entry. */
|
||
|
||
struct elf_cris_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry root;
|
||
|
||
/* Number of PC relative relocs copied for this symbol. */
|
||
struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
|
||
|
||
/* The GOTPLT references are CRIS-specific; the goal is to avoid having
|
||
both a general GOT and a PLT-specific GOT entry for the same symbol,
|
||
when it is referenced both as a function and as a function pointer.
|
||
|
||
Number of GOTPLT references for a function. */
|
||
bfd_signed_vma gotplt_refcount;
|
||
|
||
/* Actual GOTPLT index for this symbol, if applicable, or zero if not
|
||
(zero is never used as an index). FIXME: We should be able to fold
|
||
this with gotplt_refcount in a union, like the got and plt unions in
|
||
elf_link_hash_entry. */
|
||
bfd_size_type gotplt_offset;
|
||
|
||
/* The root.got.refcount is the sum of the regular reference counts
|
||
(this) and those members below. We have to keep a separate count
|
||
to track when we've found the first (or last) reference to a
|
||
regular got entry. The offset is in root.got.offset. */
|
||
bfd_signed_vma reg_got_refcount;
|
||
|
||
/* Similar to the above, the number of reloc references to this
|
||
symbols that need a R_CRIS_32_TPREL slot. The offset is in
|
||
root.got.offset, because this and .dtp_refcount can't validly
|
||
happen when there's also a regular GOT entry; that's invalid
|
||
input for which an error is emitted. */
|
||
bfd_signed_vma tprel_refcount;
|
||
|
||
/* Similar to the above, the number of reloc references to this
|
||
symbols that need a R_CRIS_DTP slot. The offset is in
|
||
root.got.offset; plus 4 if .tprel_refcount > 0. */
|
||
bfd_signed_vma dtp_refcount;
|
||
};
|
||
|
||
/* The local_got_refcounts and local_got_offsets are a multiple of
|
||
LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
|
||
refcount for GOT itself, see code), with the summary / group offset
|
||
for local symbols located at offset N, reference counts for
|
||
ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
|
||
relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
|
||
3*LSNUM. */
|
||
|
||
#define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
|
||
#define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
|
||
#define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
|
||
#define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
|
||
|
||
/* CRIS ELF linker hash table. */
|
||
|
||
struct elf_cris_link_hash_table
|
||
{
|
||
struct elf_link_hash_table root;
|
||
|
||
/* We can't use the PLT offset and calculate to get the GOTPLT offset,
|
||
since we try and avoid creating GOTPLT:s when there's already a GOT.
|
||
Instead, we keep and update the next available index here. */
|
||
bfd_size_type next_gotplt_entry;
|
||
|
||
/* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
|
||
been seen for any input; if != 0, then the constant-offset
|
||
R_CRIS_DTPMOD is needed for this DSO/executable. This turns
|
||
negative at relocation, so that we don't need an extra flag for
|
||
when the reloc is output. */
|
||
bfd_signed_vma dtpmod_refcount;
|
||
};
|
||
|
||
/* Traverse a CRIS ELF linker hash table. */
|
||
|
||
#define elf_cris_link_hash_traverse(table, func, info) \
|
||
(elf_link_hash_traverse \
|
||
(&(table)->root, \
|
||
(bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
|
||
(info)))
|
||
|
||
/* Get the CRIS ELF linker hash table from a link_info structure. */
|
||
|
||
#define elf_cris_hash_table(p) \
|
||
(elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
|
||
== CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
|
||
|
||
/* Get the CRIS ELF linker hash entry from a regular hash entry (the
|
||
"parent class"). The .root reference is just a simple type
|
||
check on the argument. */
|
||
|
||
#define elf_cris_hash_entry(p) \
|
||
((struct elf_cris_link_hash_entry *) (&(p)->root))
|
||
|
||
/* Create an entry in a CRIS ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
|
||
struct bfd_hash_table *table,
|
||
const char *string)
|
||
{
|
||
struct elf_cris_link_hash_entry *ret =
|
||
(struct elf_cris_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct elf_cris_link_hash_entry *) NULL)
|
||
ret = ((struct elf_cris_link_hash_entry *)
|
||
bfd_hash_allocate (table,
|
||
sizeof (struct elf_cris_link_hash_entry)));
|
||
if (ret == (struct elf_cris_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct elf_cris_link_hash_entry *)
|
||
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct elf_cris_link_hash_entry *) NULL)
|
||
{
|
||
ret->pcrel_relocs_copied = NULL;
|
||
ret->gotplt_refcount = 0;
|
||
ret->gotplt_offset = 0;
|
||
ret->dtp_refcount = 0;
|
||
ret->tprel_refcount = 0;
|
||
ret->reg_got_refcount = 0;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create a CRIS ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
elf_cris_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct elf_cris_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
|
||
|
||
ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
|
||
if (ret == (struct elf_cris_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
elf_cris_link_hash_newfunc,
|
||
sizeof (struct elf_cris_link_hash_entry),
|
||
CRIS_ELF_DATA))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
/* Initialize to skip over the first three entries in the gotplt; they
|
||
are used for run-time symbol evaluation. */
|
||
ret->next_gotplt_entry = 12;
|
||
|
||
/* We haven't seen any R_CRIS_nn_GOT_TPREL initially. */
|
||
ret->dtpmod_refcount = 0;
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* Perform a single relocation. By default we use the standard BFD
|
||
routines, with a few tweaks. */
|
||
|
||
static bfd_reloc_status_type
|
||
cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
|
||
relocation)
|
||
reloc_howto_type * howto;
|
||
bfd * input_bfd;
|
||
asection * input_section;
|
||
bfd_byte * contents;
|
||
Elf_Internal_Rela * rel;
|
||
bfd_vma relocation;
|
||
{
|
||
bfd_reloc_status_type r;
|
||
enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
/* PC-relative relocations are relative to the position *after*
|
||
the reloc. Note that for R_CRIS_8_PCREL the adjustment is
|
||
not a single byte, since PC must be 16-bit-aligned. */
|
||
switch (r_type)
|
||
{
|
||
/* Check that the 16-bit GOT relocs are positive. */
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_16_GOT:
|
||
if ((bfd_signed_vma) relocation < 0)
|
||
return bfd_reloc_overflow;
|
||
break;
|
||
|
||
case R_CRIS_32_PLT_PCREL:
|
||
case R_CRIS_32_PCREL:
|
||
relocation -= 2;
|
||
/* Fall through. */
|
||
case R_CRIS_8_PCREL:
|
||
case R_CRIS_16_PCREL:
|
||
relocation -= 2;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
return r;
|
||
}
|
||
|
||
|
||
/* The number of errors left before we stop outputting reloc-specific
|
||
explanatory messages. By coincidence, this works nicely together
|
||
with the default number of messages you'll get from LD about
|
||
"relocation truncated to fit" messages before you get an
|
||
"additional relocation overflows omitted from the output". */
|
||
static int additional_relocation_error_msg_count = 10;
|
||
|
||
/* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
|
||
copied, for further comments. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
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 elf_cris_link_hash_table * htab;
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
asection *sgot;
|
||
asection *splt;
|
||
asection *sreloc;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
asection *srelgot;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
sgot = NULL;
|
||
splt = NULL;
|
||
sreloc = NULL;
|
||
srelgot = NULL;
|
||
|
||
if (dynobj != NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
}
|
||
|
||
for (rel = relocs; rel < relend; rel ++)
|
||
{
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
const char *symname = NULL;
|
||
enum elf_cris_reloc_type r_type;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if ( r_type == R_CRIS_GNU_VTINHERIT
|
||
|| r_type == R_CRIS_GNU_VTENTRY)
|
||
continue;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
howto = cris_elf_howto_table + r_type;
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections [r_symndx];
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
|
||
symname = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (symname == NULL)
|
||
symname = bfd_section_name (input_bfd, sec);
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean warned;
|
||
bfd_boolean unresolved_reloc;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
|
||
symname = h->root.root.string;
|
||
|
||
if (unresolved_reloc
|
||
/* Perhaps we should detect the cases that
|
||
sec->output_section is expected to be NULL like i386 and
|
||
m68k, but apparently (and according to elfxx-ia64.c) all
|
||
valid cases are where the symbol is defined in a shared
|
||
object which we link dynamically against. This includes
|
||
PLT relocs for which we've created a PLT entry and other
|
||
relocs for which we're prepared to create dynamic
|
||
relocations.
|
||
|
||
For now, new situations cause us to just err when
|
||
sec->output_offset is NULL but the object with the symbol
|
||
is *not* dynamically linked against. Thus this will
|
||
automatically remind us so we can see if there are other
|
||
valid cases we need to revisit. */
|
||
&& (sec->owner->flags & DYNAMIC) != 0)
|
||
relocation = 0;
|
||
|
||
else if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
/* Here follow the cases where the relocation value must
|
||
be zero (or when further handling is simplified when
|
||
zero). I can't claim to understand the various
|
||
conditions and they weren't described in the files
|
||
where I copied them from (elf32-m68k.c and
|
||
elf32-i386.c), but let's mention examples of where
|
||
they happen. FIXME: Perhaps define and use a
|
||
dynamic_symbol_p function like ia64.
|
||
|
||
- When creating a shared library, we can have an
|
||
ordinary relocation for a symbol defined in a shared
|
||
library (perhaps the one we create). We then make
|
||
the relocation value zero, as the value seen now will
|
||
be added into the relocation addend in this shared
|
||
library, but must be handled only at dynamic-link
|
||
time. FIXME: Not sure this example covers the
|
||
h->elf_link_hash_flags test, though it's there in
|
||
other targets. */
|
||
if (info->shared
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| !h->def_regular)
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& (r_type == R_CRIS_8
|
||
|| r_type == R_CRIS_16
|
||
|| r_type == R_CRIS_32
|
||
|| r_type == R_CRIS_8_PCREL
|
||
|| r_type == R_CRIS_16_PCREL
|
||
|| r_type == R_CRIS_32_PCREL))
|
||
relocation = 0;
|
||
else if (!info->relocatable && unresolved_reloc)
|
||
{
|
||
_bfd_error_handler
|
||
(_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
symname);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (sec != NULL && elf_discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, relend, howto, contents);
|
||
|
||
if (info->relocatable)
|
||
continue;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
/* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
|
||
but we require a PLT, and the PLT handling will take care of
|
||
filling in the PLT-specific GOT entry. For the GOT offset,
|
||
calculate it as we do when filling it in for the .got.plt
|
||
section. If we don't have a PLT, punt to GOT handling. */
|
||
if (h != NULL
|
||
&& ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
|
||
{
|
||
asection *sgotplt
|
||
= bfd_get_section_by_name (dynobj, ".got.plt");
|
||
bfd_vma got_offset;
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
BFD_ASSERT (sgotplt != NULL);
|
||
|
||
got_offset
|
||
= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
|
||
|
||
relocation = got_offset;
|
||
break;
|
||
}
|
||
|
||
/* We didn't make a PLT entry for this symbol. Maybe everything is
|
||
folded into the GOT. Other than folding, this happens when
|
||
statically linking PIC code, or when using -Bsymbolic. Check
|
||
that we instead have a GOT entry as done for us by
|
||
elf_cris_adjust_dynamic_symbol, and drop through into the
|
||
ordinary GOT cases. This must not happen for the
|
||
executable, because any reference it does to a function
|
||
that is satisfied by a DSO must generate a PLT. We assume
|
||
these call-specific relocs don't address non-functions. */
|
||
if (h != NULL
|
||
&& (h->got.offset == (bfd_vma) -1
|
||
|| (!info->shared
|
||
&& !(h->def_regular
|
||
|| (!h->def_dynamic
|
||
&& h->root.type == bfd_link_hash_undefweak)))))
|
||
{
|
||
(*_bfd_error_handler)
|
||
((h->got.offset == (bfd_vma) -1)
|
||
? _("%B, section %A: No PLT nor GOT for relocation %s"
|
||
" against symbol `%s'")
|
||
: _("%B, section %A: No PLT for relocation %s"
|
||
" against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
(symname != NULL && symname[0] != '\0'
|
||
? symname : _("[whose name is lost]")));
|
||
|
||
/* FIXME: Perhaps blaming input is not the right thing to
|
||
do; this is probably an internal error. But it is true
|
||
that we didn't like that particular input. */
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
/* Fall through. */
|
||
|
||
/* The size of the actual relocation is not used here; we only
|
||
fill in the GOT table here. */
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
{
|
||
bfd_vma off;
|
||
|
||
/* Note that despite using RELA relocations, the .got contents
|
||
is always filled in with the link-relative relocation
|
||
value; the addend. */
|
||
|
||
if (h != NULL)
|
||
{
|
||
off = h->got.offset;
|
||
BFD_ASSERT (off != (bfd_vma) -1);
|
||
|
||
if (!elf_hash_table (info)->dynamic_sections_created
|
||
|| (! info->shared
|
||
&& (h->def_regular
|
||
|| h->type == STT_FUNC
|
||
|| h->needs_plt))
|
||
|| (info->shared
|
||
&& (info->symbolic || h->dynindx == -1)
|
||
&& h->def_regular))
|
||
{
|
||
/* This wasn't checked above for ! info->shared, but
|
||
must hold there if we get here; the symbol must
|
||
be defined in the regular program or be undefweak
|
||
or be a function or otherwise need a PLT. */
|
||
BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
|
||
|| info->shared
|
||
|| h->def_regular
|
||
|| h->type == STT_FUNC
|
||
|| h->needs_plt
|
||
|| h->root.type == bfd_link_hash_undefweak);
|
||
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined locally,
|
||
or is undefweak, or the symbol was forced to be
|
||
local because of a version file, or we're not
|
||
creating a dynamic object. We must initialize this
|
||
entry in the global offset table. Since the offset
|
||
must always be a multiple of 4, we use the least
|
||
significant bit to record whether we have
|
||
initialized it already.
|
||
|
||
If this GOT entry should be runtime-initialized, we
|
||
will create a .rela.got relocation entry to
|
||
initialize the value. This is done in the
|
||
finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (local_got_offsets != NULL
|
||
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 4. We use
|
||
the least significant bit to record whether we have
|
||
already generated the necessary reloc. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
if (srelgot == NULL)
|
||
srelgot
|
||
= bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
|
||
outrel.r_addend = relocation;
|
||
loc = srelgot->contents;
|
||
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = sgot->output_offset + off;
|
||
if (rel->r_addend != 0)
|
||
{
|
||
/* We can't do anything for a relocation which is against
|
||
a symbol *plus offset*. GOT holds relocations for
|
||
symbols. Make this an error; the compiler isn't
|
||
allowed to pass us these kinds of things. */
|
||
if (h == NULL)
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s with non-zero addend %d"
|
||
" against local symbol"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
rel->r_addend);
|
||
else
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s with non-zero addend %d"
|
||
" against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
rel->r_addend,
|
||
symname[0] != '\0' ? symname : _("[whose name is lost]"));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case R_CRIS_32_GOTREL:
|
||
/* This relocation must only be performed against local symbols.
|
||
It's also ok when we link a program and the symbol is either
|
||
defined in an ordinary (non-DSO) object or is undefined weak. */
|
||
if (h != NULL
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
&& !(!info->shared
|
||
&& (h->def_regular
|
||
|| (!h->def_dynamic
|
||
&& h->root.type == bfd_link_hash_undefweak))))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s is"
|
||
" not allowed for global symbol: `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
symname);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
/* This can happen if we get a link error with the input ELF
|
||
variant mismatching the output variant. Emit an error so
|
||
it's noticed if it happens elsewhere. */
|
||
if (sgot == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s with no GOT created"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
/* This relocation is like a PC-relative one, except the
|
||
reference point is the location of GOT. Note that
|
||
sgot->output_offset is not involved in this calculation. We
|
||
always want the start of entire .got section, not the
|
||
position after the reserved header. */
|
||
relocation -= sgot->output_section->vma;
|
||
break;
|
||
|
||
case R_CRIS_32_PLT_PCREL:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* Resolve a PLT_PCREL reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
||
break;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1
|
||
|| 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 = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset);
|
||
break;
|
||
|
||
case R_CRIS_32_PLT_GOTREL:
|
||
/* Like R_CRIS_32_PLT_PCREL, but the reference point is the
|
||
start of the .got section. See also comment at
|
||
R_CRIS_32_GOT. */
|
||
relocation -= sgot->output_section->vma;
|
||
|
||
/* Resolve a PLT_GOTREL reloc against a local symbol directly,
|
||
without using the procedure linkage table. */
|
||
if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
||
break;
|
||
|
||
if (h->plt.offset == (bfd_vma) -1
|
||
|| 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 = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset
|
||
- sgot->output_section->vma);
|
||
break;
|
||
|
||
case R_CRIS_8_PCREL:
|
||
case R_CRIS_16_PCREL:
|
||
case R_CRIS_32_PCREL:
|
||
/* If the symbol was local, we need no shlib-specific handling. */
|
||
if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
|
||
|| h->dynindx == -1)
|
||
break;
|
||
|
||
/* Fall through. */
|
||
case R_CRIS_8:
|
||
case R_CRIS_16:
|
||
case R_CRIS_32:
|
||
if (info->shared
|
||
&& r_symndx != STN_UNDEF
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& ((r_type != R_CRIS_8_PCREL
|
||
&& r_type != R_CRIS_16_PCREL
|
||
&& r_type != R_CRIS_32_PCREL)
|
||
|| (!info->symbolic
|
||
|| (h != NULL && !h->def_regular))))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
bfd_boolean skip, relocate;
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = _bfd_elf_get_dynamic_reloc_section
|
||
(dynobj, input_section, /*rela?*/ TRUE);
|
||
/* The section should have been created in cris_elf_check_relocs,
|
||
but that function will not be called for objects which fail in
|
||
cris_elf_merge_private_bfd_data. */
|
||
if (sreloc == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
skip = FALSE;
|
||
relocate = FALSE;
|
||
|
||
outrel.r_offset =
|
||
_bfd_elf_section_offset (output_bfd, info, input_section,
|
||
rel->r_offset);
|
||
if (outrel.r_offset == (bfd_vma) -1)
|
||
skip = TRUE;
|
||
else if (outrel.r_offset == (bfd_vma) -2
|
||
/* For now, undefined weak symbols with non-default
|
||
visibility (yielding 0), like exception info for
|
||
discarded sections, will get a R_CRIS_NONE
|
||
relocation rather than no relocation, because we
|
||
notice too late that the symbol doesn't need a
|
||
relocation. */
|
||
|| (h != NULL
|
||
&& h->root.type == bfd_link_hash_undefweak
|
||
&& ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
|
||
skip = TRUE, relocate = TRUE;
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
/* h->dynindx may be -1 if the symbol was marked to
|
||
become local. */
|
||
else if (h != NULL
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| !h->def_regular))
|
||
{
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
|
||
if (r_type == R_CRIS_32)
|
||
{
|
||
relocate = TRUE;
|
||
outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
if (bfd_is_abs_section (sec))
|
||
indx = 0;
|
||
else if (sec == NULL || sec->owner == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
asection *osec;
|
||
|
||
/* We are turning this relocation into one
|
||
against a section symbol. It would be
|
||
proper to subtract the symbol's value,
|
||
osec->vma, from the emitted reloc addend,
|
||
but ld.so expects buggy relocs. */
|
||
osec = sec->output_section;
|
||
indx = elf_section_data (osec)->dynindx;
|
||
if (indx == 0)
|
||
{
|
||
osec = htab->root.text_index_section;
|
||
indx = elf_section_data (osec)->dynindx;
|
||
}
|
||
BFD_ASSERT (indx != 0);
|
||
}
|
||
|
||
outrel.r_info = ELF32_R_INFO (indx, r_type);
|
||
}
|
||
}
|
||
|
||
loc = sreloc->contents;
|
||
loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
/* This reloc will be computed at runtime, so there's no
|
||
need to do anything now, except for R_CRIS_32 relocations
|
||
that have been turned into R_CRIS_RELATIVE. */
|
||
if (!relocate)
|
||
continue;
|
||
}
|
||
|
||
break;
|
||
|
||
case R_CRIS_16_DTPREL:
|
||
case R_CRIS_32_DTPREL:
|
||
/* This relocation must only be performed against local
|
||
symbols, or to sections that are not loadable. It's also
|
||
ok when we link a program and the symbol is defined in an
|
||
ordinary (non-DSO) object (if it's undefined there, we've
|
||
already seen an error). */
|
||
if (h != NULL
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
&& (info->shared
|
||
|| (!h->def_regular
|
||
&& h->root.type != bfd_link_hash_undefined)))
|
||
{
|
||
(*_bfd_error_handler)
|
||
((h->root.type == bfd_link_hash_undefined)
|
||
/* We shouldn't get here for GCC-emitted code. */
|
||
? _("%B, section %A: relocation %s has an undefined"
|
||
" reference to `%s', perhaps a declaration mixup?")
|
||
: ("%B, section %A: relocation %s is"
|
||
" not allowed for `%s', a global symbol with default"
|
||
" visibility, perhaps a declaration mixup?"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
symname != NULL && symname[0] != '\0'
|
||
? symname : _("[whose name is lost]"));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
|
||
|| htab->dtpmod_refcount != 0);
|
||
|
||
/* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
|
||
already done so. Note that we do this in .got.plt, not
|
||
in .got, as .got.plt contains the first part, still the
|
||
reloc is against .got, because the linker script directs
|
||
(is required to direct) them both into .got. */
|
||
if (htab->dtpmod_refcount > 0
|
||
&& (input_section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (sgotplt != NULL);
|
||
|
||
if (info->shared)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
if (srelgot == NULL)
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
loc = srelgot->contents;
|
||
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
|
||
outrel.r_offset = (sgotplt->output_section->vma
|
||
+ sgotplt->output_offset
|
||
+ 12);
|
||
outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
|
||
outrel.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
else
|
||
{
|
||
/* For an executable, the GOT entry contents is known. */
|
||
bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
|
||
}
|
||
|
||
/* Reverse the sign to mark that we've emitted the
|
||
required GOT entry. */
|
||
htab->dtpmod_refcount = - htab->dtpmod_refcount;
|
||
}
|
||
|
||
/* The relocation is the offset from the start of the module
|
||
TLS block to the (local) symbol. */
|
||
relocation -= elf_hash_table (info)->tls_sec == NULL
|
||
? 0 : elf_hash_table (info)->tls_sec->vma;
|
||
break;
|
||
|
||
case R_CRIS_32_GD:
|
||
if (info->shared)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
|
||
/* We've already informed in cris_elf_check_relocs that
|
||
this is an error. */
|
||
return FALSE;
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
if (rel->r_addend != 0)
|
||
{
|
||
/* We can't do anything for a relocation which is against a
|
||
symbol *plus offset*. The GOT holds relocations for
|
||
symbols. Make this an error; the compiler isn't allowed
|
||
to pass us these kinds of things. */
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s with non-zero addend %d"
|
||
" against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
rel->r_addend,
|
||
symname[0] != '\0' ? symname : _("[whose name is lost]"));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
if (!info->shared
|
||
&& (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
|
||
{
|
||
/* Known contents of the GOT. */
|
||
bfd_vma off;
|
||
|
||
/* The symbol is defined in the program, so just write
|
||
(1, known_tpoffset) into the GOT. */
|
||
relocation -= elf_hash_table (info)->tls_sec->vma;
|
||
|
||
if (h != NULL)
|
||
{
|
||
off = elf_cris_hash_entry (h)->tprel_refcount > 0
|
||
? h->got.offset + 4 : h->got.offset;
|
||
}
|
||
else
|
||
{
|
||
off = local_got_offsets[r_symndx];
|
||
if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
|
||
off += 4;
|
||
}
|
||
|
||
/* We use bit 1 of the offset as a flag for GOT entry with
|
||
the R_CRIS_DTP reloc, setting it when we've emitted the
|
||
GOT entry and reloc. Bit 0 is used for R_CRIS_32_TPREL
|
||
relocs. */
|
||
if ((off & 2) == 0)
|
||
{
|
||
off &= ~3;
|
||
|
||
if (h != NULL)
|
||
h->got.offset |= 2;
|
||
else
|
||
local_got_offsets[r_symndx] |= 2;
|
||
|
||
bfd_put_32 (output_bfd, 1, sgot->contents + off);
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
|
||
}
|
||
else
|
||
off &= ~3;
|
||
|
||
relocation = sgot->output_offset + off
|
||
+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
|
||
}
|
||
else
|
||
{
|
||
/* Not all parts of the GOT entry are known; emit a real
|
||
relocation. */
|
||
bfd_vma off;
|
||
|
||
if (h != NULL)
|
||
off = elf_cris_hash_entry (h)->tprel_refcount > 0
|
||
? h->got.offset + 4 : h->got.offset;
|
||
else
|
||
{
|
||
off = local_got_offsets[r_symndx];
|
||
if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
|
||
off += 4;
|
||
}
|
||
|
||
/* See above re bit 1 and bit 0 usage. */
|
||
if ((off & 2) == 0)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
off &= ~3;
|
||
|
||
if (h != NULL)
|
||
h->got.offset |= 2;
|
||
else
|
||
local_got_offsets[r_symndx] |= 2;
|
||
|
||
/* Clear the target contents of the GOT (just as a
|
||
gesture; it's already cleared on allocation): this
|
||
relocation is not like the other dynrelocs. */
|
||
bfd_put_32 (output_bfd, 0, sgot->contents + off);
|
||
bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
|
||
|
||
if (srelgot == NULL)
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
if (h != NULL && h->dynindx != -1)
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
|
||
relocation = 0;
|
||
}
|
||
else
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
|
||
|
||
/* NULL if we had an error. */
|
||
relocation -= elf_hash_table (info)->tls_sec == NULL
|
||
? 0 : elf_hash_table (info)->tls_sec->vma;
|
||
}
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ off);
|
||
outrel.r_addend = relocation;
|
||
loc = srelgot->contents;
|
||
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
|
||
/* NULL if we had an error. */
|
||
if (srelgot->contents != NULL)
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
else
|
||
off &= ~3;
|
||
|
||
relocation = sgot->output_offset + off
|
||
+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
|
||
}
|
||
|
||
/* The GOT-relative offset to the GOT entry is the
|
||
relocation, or for R_CRIS_32_GD, the actual address of
|
||
the GOT entry. */
|
||
break;
|
||
|
||
case R_CRIS_32_IE:
|
||
if (info->shared)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
|
||
/* We've already informed in cris_elf_check_relocs that
|
||
this is an error. */
|
||
return FALSE;
|
||
}
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
if (rel->r_addend != 0)
|
||
{
|
||
/* We can't do anything for a relocation which is
|
||
against a symbol *plus offset*. GOT holds
|
||
relocations for symbols. Make this an error; the
|
||
compiler isn't allowed to pass us these kinds of
|
||
things. */
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s with non-zero addend %d"
|
||
" against symbol `%s'"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
rel->r_addend,
|
||
symname[0] != '\0' ? symname : _("[whose name is lost]"));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
if (!info->shared && (h == NULL || h->def_regular))
|
||
{
|
||
/* Known contents of the GOT. */
|
||
bfd_vma off;
|
||
|
||
/* The symbol is defined in the program, so just write
|
||
the -prog_tls_size+known_tpoffset into the GOT. */
|
||
relocation -= elf_hash_table (info)->tls_sec->vma;
|
||
relocation -= elf_hash_table (info)->tls_size;
|
||
|
||
if (h != NULL)
|
||
off = h->got.offset;
|
||
else
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* Bit 0 is used to mark whether we've emitted the required
|
||
entry (and if needed R_CRIS_32_TPREL reloc). Bit 1
|
||
is used similarly for R_CRIS_DTP, see above. */
|
||
if ((off & 1) == 0)
|
||
{
|
||
off &= ~3;
|
||
|
||
if (h != NULL)
|
||
h->got.offset |= 1;
|
||
else
|
||
local_got_offsets[r_symndx] |= 1;
|
||
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
}
|
||
else
|
||
off &= ~3;
|
||
|
||
relocation = sgot->output_offset + off
|
||
+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
|
||
}
|
||
else
|
||
{
|
||
/* Emit a real relocation. */
|
||
bfd_vma off;
|
||
|
||
if (h != NULL)
|
||
off = h->got.offset;
|
||
else
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* See above re usage of bit 0 and 1. */
|
||
if ((off & 1) == 0)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
off &= ~3;
|
||
|
||
if (h != NULL)
|
||
h->got.offset |= 1;
|
||
else
|
||
local_got_offsets[r_symndx] |= 1;
|
||
|
||
if (srelgot == NULL)
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
if (h != NULL && h->dynindx != -1)
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
|
||
relocation = 0;
|
||
}
|
||
else
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
|
||
|
||
/* NULL if we had an error. */
|
||
relocation -= elf_hash_table (info)->tls_sec == NULL
|
||
? 0 : elf_hash_table (info)->tls_sec->vma;
|
||
}
|
||
|
||
/* Just "define" the initial contents in some
|
||
semi-logical way. */
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ off);
|
||
outrel.r_addend = relocation;
|
||
loc = srelgot->contents;
|
||
loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
/* NULL if we had an error. */
|
||
if (srelgot->contents != NULL)
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
else
|
||
off &= ~3;
|
||
|
||
relocation = sgot->output_offset + off
|
||
+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
|
||
}
|
||
|
||
/* The GOT-relative offset to the GOT entry is the relocation,
|
||
or for R_CRIS_32_GD, the actual address of the GOT entry. */
|
||
break;
|
||
|
||
case R_CRIS_16_TPREL:
|
||
case R_CRIS_32_TPREL:
|
||
/* This relocation must only be performed against symbols
|
||
defined in an ordinary (non-DSO) object. */
|
||
if (info->shared)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
|
||
/* We've already informed in cris_elf_check_relocs that
|
||
this is an error. */
|
||
return FALSE;
|
||
}
|
||
|
||
if (h != NULL
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
&& !(h->def_regular || ELF_COMMON_DEF_P (h))
|
||
/* If it's undefined, then an error message has already
|
||
been emitted. */
|
||
&& h->root.type != bfd_link_hash_undefined)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A: relocation %s is"
|
||
" not allowed for symbol: `%s'"
|
||
" which is defined outside the program,"
|
||
" perhaps a declaration mixup?"),
|
||
input_bfd,
|
||
input_section,
|
||
cris_elf_howto_table[r_type].name,
|
||
symname);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
/* NULL if we had an error. */
|
||
relocation -= elf_hash_table (info)->tls_sec == NULL
|
||
? 0
|
||
: (elf_hash_table (info)->tls_sec->vma
|
||
+ elf_hash_table (info)->tls_size);
|
||
|
||
/* The TLS-relative offset is the relocation. */
|
||
break;
|
||
|
||
default:
|
||
BFD_FAIL ();
|
||
return FALSE;
|
||
}
|
||
|
||
r = cris_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel, relocation);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char * msg = (const char *) NULL;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
r = info->callbacks->reloc_overflow
|
||
(info, (h ? &h->root : NULL), symname, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
if (additional_relocation_error_msg_count > 0)
|
||
{
|
||
additional_relocation_error_msg_count--;
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_16_GOT:
|
||
|
||
/* Not just TLS is involved here, so we make
|
||
generation and message depend on -fPIC/-fpic
|
||
only. */
|
||
case R_CRIS_16_GOT_TPREL:
|
||
case R_CRIS_16_GOT_GD:
|
||
(*_bfd_error_handler)
|
||
(_("(too many global variables for -fpic:"
|
||
" recompile with -fPIC)"));
|
||
break;
|
||
|
||
case R_CRIS_16_TPREL:
|
||
case R_CRIS_16_DTPREL:
|
||
(*_bfd_error_handler)
|
||
(_("(thread-local data too big for -fpic or"
|
||
" -msmall-tls: recompile with -fPIC or"
|
||
" -mno-small-tls)"));
|
||
break;
|
||
|
||
/* No known cause for overflow for other relocs. */
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
r = info->callbacks->undefined_symbol
|
||
(info, symname, input_bfd, input_section, rel->r_offset,
|
||
TRUE);
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
break;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
break;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
break;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
break;
|
||
}
|
||
|
||
if (msg)
|
||
r = info->callbacks->warning
|
||
(info, msg, symname, input_bfd, input_section, rel->r_offset);
|
||
|
||
if (! r)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_finish_dynamic_symbol (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
struct elf_cris_link_hash_table * htab;
|
||
bfd *dynobj;
|
||
|
||
/* Where in the plt entry to put values. */
|
||
int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
|
||
|
||
/* What offset to add to the distance to the first PLT entry for the
|
||
value at plt_off3. */
|
||
int plt_off3_value_bias = 4;
|
||
|
||
/* Where in the PLT entry the call-dynlink-stub is (happens to be same
|
||
for PIC and non-PIC for v32 and pre-v32). */
|
||
int plt_stub_offset = 8;
|
||
int plt_entry_size = PLT_ENTRY_SIZE;
|
||
const bfd_byte *plt_entry = elf_cris_plt_entry;
|
||
const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
/* Adjust the various PLT entry offsets. */
|
||
if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
|
||
{
|
||
plt_off2 = 14;
|
||
plt_off3 = 20;
|
||
plt_off3_value_bias = -2;
|
||
plt_stub_offset = 12;
|
||
plt_entry_size = PLT_ENTRY_SIZE_V32;
|
||
plt_entry = elf_cris_plt_entry_v32;
|
||
plt_pic_entry = elf_cris_pic_plt_entry_v32;
|
||
}
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *sgotplt;
|
||
asection *srela;
|
||
bfd_vma got_base;
|
||
|
||
bfd_vma gotplt_offset
|
||
= elf_cris_hash_entry (h)->gotplt_offset;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
bfd_boolean has_gotplt = gotplt_offset != 0;
|
||
|
||
/* Get the index in the .rela.plt relocations for the .got.plt
|
||
entry that corresponds to this symbol.
|
||
We have to count backwards here, and the result is only valid
|
||
as an index into .rela.plt. We also have to undo the effect
|
||
of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
|
||
.got.plt) for which gotplt_offset is adjusted, because while
|
||
that entry goes into .got.plt, its relocation goes into
|
||
.rela.got, not .rela.plt. (It's not PLT-specific; not to be
|
||
processed as part of the runtime lazy .rela.plt relocation).
|
||
FIXME: There be literal constants here... */
|
||
bfd_vma rela_plt_index
|
||
= (htab->dtpmod_refcount != 0
|
||
? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
|
||
|
||
/* Get the offset into the .got table of the entry that corresponds
|
||
to this function. Note that we embed knowledge that "incoming"
|
||
.got goes after .got.plt in the output without padding (pointer
|
||
aligned). However, that knowledge is present in several other
|
||
places too. */
|
||
bfd_vma got_offset
|
||
= (has_gotplt
|
||
? gotplt_offset
|
||
: h->got.offset + htab->next_gotplt_entry);
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set it
|
||
up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (splt != NULL && sgotplt != NULL
|
||
&& (! has_gotplt || srela != NULL));
|
||
|
||
got_base = sgotplt->output_section->vma + sgotplt->output_offset;
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
if (! info->shared)
|
||
{
|
||
memcpy (splt->contents + h->plt.offset, plt_entry,
|
||
plt_entry_size);
|
||
|
||
/* We need to enter the absolute address of the GOT entry here. */
|
||
bfd_put_32 (output_bfd, got_base + got_offset,
|
||
splt->contents + h->plt.offset + plt_off1);
|
||
}
|
||
else
|
||
{
|
||
memcpy (splt->contents + h->plt.offset, plt_pic_entry,
|
||
plt_entry_size);
|
||
bfd_put_32 (output_bfd, got_offset,
|
||
splt->contents + h->plt.offset + plt_off1);
|
||
}
|
||
|
||
/* Fill in the plt entry and make a relocation, if this is a "real"
|
||
PLT entry. */
|
||
if (has_gotplt)
|
||
{
|
||
/* Fill in the offset to the reloc table. */
|
||
bfd_put_32 (output_bfd,
|
||
rela_plt_index * sizeof (Elf32_External_Rela),
|
||
splt->contents + h->plt.offset + plt_off2);
|
||
|
||
/* Fill in the offset to the first PLT entry, where to "jump". */
|
||
bfd_put_32 (output_bfd,
|
||
- (h->plt.offset + plt_off3 + plt_off3_value_bias),
|
||
splt->contents + h->plt.offset + plt_off3);
|
||
|
||
/* Fill in the entry in the global offset table with the address of
|
||
the relocating stub. */
|
||
bfd_put_32 (output_bfd,
|
||
(splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt.offset
|
||
+ plt_stub_offset),
|
||
sgotplt->contents + got_offset);
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (sgotplt->output_section->vma
|
||
+ sgotplt->output_offset
|
||
+ got_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
|
||
rela.r_addend = 0;
|
||
loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (!h->def_regular)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value alone. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
|
||
/* FIXME: From elf32-sparc.c 2001-02-19 (1.18). I still don't
|
||
know whether resetting the value is significant; if it really
|
||
is, rather than a quirk or bug in the sparc port, then I
|
||
believe we'd see this elsewhere. */
|
||
/* If the symbol is weak, we do need to clear the value.
|
||
Otherwise, the PLT entry would provide a definition for
|
||
the symbol even if the symbol wasn't defined anywhere,
|
||
and so the symbol would never be NULL. */
|
||
if (!h->ref_regular_nonweak)
|
||
sym->st_value = 0;
|
||
}
|
||
}
|
||
|
||
/* For an ordinary program, we emit .got relocs only for symbols that
|
||
are in the dynamic-symbols table and are either defined by the
|
||
program or are undefined weak symbols, or are function symbols
|
||
where we do not output a PLT: the PLT reloc was output above and all
|
||
references to the function symbol are redirected to the PLT. */
|
||
if (h->got.offset != (bfd_vma) -1
|
||
&& (elf_cris_hash_entry (h)->reg_got_refcount > 0)
|
||
&& (info->shared
|
||
|| (h->dynindx != -1
|
||
&& h->plt.offset == (bfd_vma) -1
|
||
&& !h->def_regular
|
||
&& h->root.type != bfd_link_hash_undefweak)))
|
||
{
|
||
asection *sgot;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
bfd_byte *where;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it up. */
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (sgot != NULL && srela != NULL);
|
||
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got.offset &~ (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. */
|
||
where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
|
||
if (! elf_hash_table (info)->dynamic_sections_created
|
||
|| (info->shared
|
||
&& (info->symbolic || h->dynindx == -1)
|
||
&& h->def_regular))
|
||
{
|
||
rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
|
||
rela.r_addend = bfd_get_signed_32 (output_bfd, where);
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, where);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
loc = srela->contents;
|
||
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (h->needs_copy)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol needs a copy reloc. Set it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak));
|
||
|
||
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
||
".rela.bss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
rela.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
|
||
rela.r_addend = 0;
|
||
loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
||
|| h == elf_hash_table (info)->hgot)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up the dynamic sections. Do *not* emit relocs here, as their
|
||
offsets were changed, as part of -z combreloc handling, from those we
|
||
computed. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (sgot != NULL);
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
asection *splt;
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
asection *s;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
s = bfd_get_section_by_name (output_bfd, ".got");
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_ptr = s->vma;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_JMPREL:
|
||
/* Yes, we *can* have a .plt and no .plt.rela, for instance
|
||
if all symbols are found in the .got (not .got.plt). */
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
if (s == NULL)
|
||
dyn.d_un.d_val = 0;
|
||
else
|
||
dyn.d_un.d_val = s->size;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_RELASZ:
|
||
/* The procedure linkage table relocs (DT_JMPREL) should
|
||
not be included in the overall relocs (DT_RELA).
|
||
Therefore, we override the DT_RELASZ entry here to
|
||
make it not include the JMPREL relocs. Since the
|
||
linker script arranges for .rela.plt to follow all
|
||
other relocation sections, we don't have to worry
|
||
about changing the DT_RELA entry. */
|
||
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
|
||
if (s != NULL)
|
||
dyn.d_un.d_val -= s->size;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Fill in the first entry in the procedure linkage table. */
|
||
if (splt->size > 0)
|
||
{
|
||
if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
|
||
{
|
||
if (info->shared)
|
||
memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
|
||
PLT_ENTRY_SIZE_V32);
|
||
else
|
||
{
|
||
memcpy (splt->contents, elf_cris_plt0_entry_v32,
|
||
PLT_ENTRY_SIZE_V32);
|
||
bfd_put_32 (output_bfd,
|
||
sgot->output_section->vma
|
||
+ sgot->output_offset + 4,
|
||
splt->contents + 4);
|
||
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize
|
||
= PLT_ENTRY_SIZE_V32;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (info->shared)
|
||
memcpy (splt->contents, elf_cris_pic_plt0_entry,
|
||
PLT_ENTRY_SIZE);
|
||
else
|
||
{
|
||
memcpy (splt->contents, elf_cris_plt0_entry,
|
||
PLT_ENTRY_SIZE);
|
||
bfd_put_32 (output_bfd,
|
||
sgot->output_section->vma
|
||
+ sgot->output_offset + 4,
|
||
splt->contents + 6);
|
||
bfd_put_32 (output_bfd,
|
||
sgot->output_section->vma
|
||
+ sgot->output_offset + 8,
|
||
splt->contents + 14);
|
||
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize
|
||
= PLT_ENTRY_SIZE;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Fill in the first three entries in the global offset table. */
|
||
if (sgot->size > 0)
|
||
{
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
sgot->contents);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
||
}
|
||
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
cris_elf_gc_mark_hook (asection *sec,
|
||
struct bfd_link_info *info,
|
||
Elf_Internal_Rela *rel,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (h != NULL)
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_GNU_VTINHERIT:
|
||
case R_CRIS_GNU_VTENTRY:
|
||
return NULL;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_gc_sweep_hook (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
struct elf_cris_link_hash_table * htab;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h = NULL;
|
||
bfd_signed_vma got_element_size = 4;
|
||
bfd_signed_vma *specific_refcount = NULL;
|
||
enum elf_cris_reloc_type r_type;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
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;
|
||
}
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_32_GOT:
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
specific_refcount = h != NULL
|
||
? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
|
||
: &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
|
||
break;
|
||
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
got_element_size = 8;
|
||
specific_refcount = h != NULL
|
||
? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
|
||
: &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
|
||
break;
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
specific_refcount = h != NULL
|
||
? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
|
||
: &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_32_GOT_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
if (h != NULL)
|
||
{
|
||
/* If the counters are 0 when we got here, we've
|
||
miscounted somehow somewhere, an internal error. */
|
||
BFD_ASSERT (h->got.refcount > 0);
|
||
--h->got.refcount;
|
||
|
||
BFD_ASSERT (*specific_refcount > 0);
|
||
--*specific_refcount;
|
||
if (*specific_refcount == 0)
|
||
{
|
||
/* We don't need the .got entry any more. */
|
||
sgot->size -= got_element_size;
|
||
srelgot->size -= sizeof (Elf32_External_Rela);
|
||
}
|
||
break;
|
||
}
|
||
|
||
local_got_reloc:
|
||
if (local_got_refcounts != NULL)
|
||
{
|
||
/* If the counters are 0 when we got here, we've
|
||
miscounted somehow somewhere, an internal error. */
|
||
BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
|
||
--local_got_refcounts[r_symndx];
|
||
|
||
BFD_ASSERT (*specific_refcount > 0);
|
||
--*specific_refcount;
|
||
if (*specific_refcount == 0)
|
||
{
|
||
/* We don't need the .got entry any more. */
|
||
sgot->size -= got_element_size;
|
||
if (info->shared)
|
||
srelgot->size -= sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
/* For local symbols, treat these like GOT relocs. */
|
||
if (h == NULL)
|
||
goto local_got_reloc;
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_PLT_GOTREL:
|
||
/* FIXME: We don't garbage-collect away the .got section. */
|
||
if (local_got_refcounts != NULL)
|
||
local_got_refcounts[-1]--;
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_8_PCREL:
|
||
case R_CRIS_16_PCREL:
|
||
case R_CRIS_32_PCREL:
|
||
case R_CRIS_32_PLT_PCREL:
|
||
if (h != NULL)
|
||
{
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|
||
&& h->plt.refcount > 0)
|
||
--h->plt.refcount;
|
||
}
|
||
break;
|
||
|
||
case R_CRIS_32_DTPREL:
|
||
/* This'd be a .dtpreld entry in e.g. debug info. */
|
||
if ((sec->flags & SEC_ALLOC) == 0)
|
||
break;
|
||
/* Fall through. */
|
||
case R_CRIS_16_DTPREL:
|
||
htab->dtpmod_refcount--;
|
||
if (htab->dtpmod_refcount == 0)
|
||
htab->next_gotplt_entry -= 8;
|
||
BFD_ASSERT (local_got_refcounts != NULL);
|
||
local_got_refcounts[-1]--;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* The elf_backend_plt_sym_val hook function. */
|
||
|
||
static bfd_vma
|
||
cris_elf_plt_sym_val (bfd_vma i, const asection *plt,
|
||
const arelent *rel ATTRIBUTE_UNUSED)
|
||
{
|
||
bfd_size_type plt_entry_size;
|
||
|
||
plt_entry_size
|
||
= (bfd_get_mach (plt->owner) == bfd_mach_cris_v32
|
||
? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
|
||
|
||
return plt->vma + (i + 1) * plt_entry_size;
|
||
}
|
||
|
||
/* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
|
||
entry but we found we will not create any. Called when we find we will
|
||
not have any PLT for this symbol, by for example
|
||
elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
|
||
or elf_cris_size_dynamic_sections if no dynamic sections will be
|
||
created (we're only linking static objects). */
|
||
|
||
static bfd_boolean
|
||
elf_cris_adjust_gotplt_to_got (h, p)
|
||
struct elf_cris_link_hash_entry *h;
|
||
PTR p;
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) p;
|
||
|
||
if (h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
|
||
|
||
/* If nobody wanted a GOTPLT with this symbol, we're done. */
|
||
if (h->gotplt_refcount <= 0)
|
||
return TRUE;
|
||
|
||
if (h->reg_got_refcount > 0)
|
||
{
|
||
/* There's a GOT entry for this symbol. Just adjust the refcounts.
|
||
Probably not necessary at this stage, but keeping them accurate
|
||
helps avoiding surprises later. */
|
||
h->root.got.refcount += h->gotplt_refcount;
|
||
h->reg_got_refcount += h->gotplt_refcount;
|
||
h->gotplt_refcount = 0;
|
||
}
|
||
else
|
||
{
|
||
/* No GOT entry for this symbol. We need to create one. */
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
|
||
BFD_ASSERT (dynobj != NULL);
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
|
||
/* Put accurate refcounts there. */
|
||
h->root.got.refcount += h->gotplt_refcount;
|
||
h->reg_got_refcount = h->gotplt_refcount;
|
||
|
||
h->gotplt_refcount = 0;
|
||
|
||
/* We always have a .got and a .rela.got section if there were
|
||
GOTPLT relocs in input. */
|
||
BFD_ASSERT (sgot != NULL && srelgot != NULL);
|
||
|
||
/* Allocate space in the .got section. */
|
||
sgot->size += 4;
|
||
|
||
/* Allocate relocation space. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Try to fold PLT entries with GOT entries. There are two cases when we
|
||
want to do this:
|
||
|
||
- When all PLT references are GOTPLT references, and there are GOT
|
||
references, and this is not the executable. We don't have to
|
||
generate a PLT at all.
|
||
|
||
- When there are both (ordinary) PLT references and GOT references,
|
||
and this isn't the executable.
|
||
We want to make the PLT reference use the ordinary GOT entry rather
|
||
than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
|
||
since the GOT entry will have to be resolved at startup anyway.
|
||
|
||
Though the latter case is handled when room for the PLT is allocated,
|
||
not here.
|
||
|
||
By folding into the GOT, we may need a round-trip to a PLT in the
|
||
executable for calls, a loss in performance. Still, losing a
|
||
reloc is a win in size and at least in start-up time.
|
||
|
||
Note that this function is called before symbols are forced local by
|
||
version scripts. The differing cases are handled by
|
||
elf_cris_hide_symbol. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_try_fold_plt_to_got (h, p)
|
||
struct elf_cris_link_hash_entry *h;
|
||
PTR p;
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) p;
|
||
|
||
/* If there are no GOT references for this symbol, we can't fold any
|
||
other reference so there's nothing to do. Likewise if there are no
|
||
PLT references; GOTPLT references included. */
|
||
if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
|
||
return TRUE;
|
||
|
||
/* GOTPLT relocs are supposed to be included into the PLT refcount. */
|
||
BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
|
||
|
||
if (h->gotplt_refcount == h->root.plt.refcount)
|
||
{
|
||
/* The only PLT references are GOTPLT references, and there are GOT
|
||
references. Convert PLT to GOT references. */
|
||
if (! elf_cris_adjust_gotplt_to_got (h, info))
|
||
return FALSE;
|
||
|
||
/* Clear the PLT references, so no PLT will be created. */
|
||
h->root.plt.offset = (bfd_vma) -1;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
|
||
to use a GOT entry (and create one) rather than requiring a GOTPLT
|
||
entry. */
|
||
|
||
static void
|
||
elf_cris_hide_symbol (info, h, force_local)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_boolean force_local;
|
||
{
|
||
elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
|
||
|
||
_bfd_elf_link_hash_hide_symbol (info, h, force_local);
|
||
}
|
||
|
||
/* 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 bfd_boolean
|
||
elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h)
|
||
{
|
||
struct elf_cris_link_hash_table * htab;
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd_size_type plt_entry_size;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& (h->needs_plt
|
||
|| h->u.weakdef != NULL
|
||
|| (h->def_dynamic
|
||
&& h->ref_regular
|
||
&& !h->def_regular)));
|
||
|
||
plt_entry_size
|
||
= (bfd_get_mach (dynobj) == bfd_mach_cris_v32
|
||
? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later,
|
||
when we know the address of the .got section. */
|
||
if (h->type == STT_FUNC
|
||
|| h->needs_plt)
|
||
{
|
||
/* If we link a program (not a DSO), we'll get rid of unnecessary
|
||
PLT entries; we point to the actual symbols -- even for pic
|
||
relocs, because a program built with -fpic should have the same
|
||
result as one built without -fpic, specifically considering weak
|
||
symbols.
|
||
FIXME: m68k and i386 differ here, for unclear reasons. */
|
||
if (! info->shared
|
||
&& !h->def_dynamic)
|
||
{
|
||
/* This case can occur if we saw a PLT reloc in an input file,
|
||
but the symbol was not defined by a dynamic object. In such
|
||
a case, we don't actually need to build a procedure linkage
|
||
table, and we can just do an absolute or PC reloc instead, or
|
||
change a .got.plt index to a .got index for GOTPLT relocs. */
|
||
BFD_ASSERT (h->needs_plt);
|
||
h->needs_plt = 0;
|
||
h->plt.offset = (bfd_vma) -1;
|
||
return
|
||
elf_cris_adjust_gotplt_to_got ((struct
|
||
elf_cris_link_hash_entry *) h,
|
||
info);
|
||
}
|
||
|
||
/* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
|
||
where a pointer-equivalent symbol was unimportant (i.e. more
|
||
like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
|
||
of the PLT. We can't for the executable, because the GOT
|
||
entries will point to the PLT there (and be constant). */
|
||
if (info->shared
|
||
&& !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
|
||
h, info))
|
||
return FALSE;
|
||
|
||
/* GC or folding may have rendered this entry unused. */
|
||
if (h->plt.refcount <= 0)
|
||
{
|
||
h->needs_plt = 0;
|
||
h->plt.offset = (bfd_vma) -1;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* If this is the first .plt entry, make room for the special
|
||
first entry. */
|
||
if (s->size == 0)
|
||
s->size += plt_entry_size;
|
||
|
||
/* If this symbol is not defined in a regular file, and we are
|
||
not generating a shared library, then set the symbol to this
|
||
location in the .plt. */
|
||
if (!info->shared
|
||
&& !h->def_regular)
|
||
{
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->size;
|
||
}
|
||
|
||
/* If there's already a GOT entry, use that, not a .got.plt. A
|
||
GOT field still has a reference count when we get here; it's
|
||
not yet changed to an offset. We can't do this for an
|
||
executable, because then the reloc associated with the PLT
|
||
would get a non-PLT reloc pointing to the PLT. FIXME: Move
|
||
this to elf_cris_try_fold_plt_to_got. */
|
||
if (info->shared && h->got.refcount > 0)
|
||
{
|
||
h->got.refcount += h->plt.refcount;
|
||
|
||
/* Mark the PLT offset to use the GOT entry by setting the low
|
||
bit in the plt offset; it is always a multiple of
|
||
plt_entry_size (which is at least a multiple of 2). */
|
||
BFD_ASSERT ((s->size % plt_entry_size) == 0);
|
||
|
||
/* Change the PLT refcount to an offset. */
|
||
h->plt.offset = s->size;
|
||
|
||
/* By not setting gotplt_offset (i.e. it remains at 0), we signal
|
||
that the got entry should be used instead. */
|
||
BFD_ASSERT (((struct elf_cris_link_hash_entry *)
|
||
h)->gotplt_offset == 0);
|
||
|
||
/* Make room for this entry. */
|
||
s->size += plt_entry_size;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* No GOT reference for this symbol; prepare for an ordinary PLT. */
|
||
h->plt.offset = s->size;
|
||
|
||
/* Make room for this entry. */
|
||
s->size += plt_entry_size;
|
||
|
||
/* We also need to make an entry in the .got.plt section, which
|
||
will be placed in the .got section by the linker script. */
|
||
((struct elf_cris_link_hash_entry *) h)->gotplt_offset
|
||
= htab->next_gotplt_entry;
|
||
htab->next_gotplt_entry += 4;
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".got.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size += 4;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size += sizeof (Elf32_External_Rela);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Reinitialize the plt offset now that it is not used as a reference
|
||
count any more. */
|
||
h->plt.offset = (bfd_vma) -1;
|
||
|
||
/* 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->u.weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
||
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->u.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->non_got_ref)
|
||
return TRUE;
|
||
|
||
if (h->size == 0)
|
||
{
|
||
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
|
||
h->root.root.string);
|
||
return TRUE;
|
||
}
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *srel;
|
||
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->size += sizeof (Elf32_External_Rela);
|
||
h->needs_copy = 1;
|
||
}
|
||
|
||
return _bfd_elf_adjust_dynamic_copy (h, s);
|
||
}
|
||
|
||
/* Adjust our "subclass" elements for an indirect symbol. */
|
||
|
||
static void
|
||
elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *dir,
|
||
struct elf_link_hash_entry *ind)
|
||
{
|
||
struct elf_cris_link_hash_entry *edir, *eind;
|
||
|
||
edir = (struct elf_cris_link_hash_entry *) dir;
|
||
eind = (struct elf_cris_link_hash_entry *) ind;
|
||
|
||
/* Only indirect symbols are replaced; we're not interested in
|
||
updating any of EIND's fields for other symbols. */
|
||
if (eind->root.root.type != bfd_link_hash_indirect)
|
||
{
|
||
/* Still, we need to copy flags for e.g. weak definitions. */
|
||
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
||
return;
|
||
}
|
||
|
||
BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
|
||
|
||
#define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
|
||
#define XMOVE(F) XMOVOPZ (F, +=, 0)
|
||
if (eind->pcrel_relocs_copied != NULL)
|
||
{
|
||
if (edir->pcrel_relocs_copied != NULL)
|
||
{
|
||
struct elf_cris_pcrel_relocs_copied **pp;
|
||
struct elf_cris_pcrel_relocs_copied *p;
|
||
|
||
/* Add reloc counts against the indirect sym to the direct sym
|
||
list. Merge any entries against the same section. */
|
||
for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
|
||
{
|
||
struct elf_cris_pcrel_relocs_copied *q;
|
||
p = *pp;
|
||
for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
|
||
if (q->section == p->section)
|
||
{
|
||
q->count += p->count;
|
||
*pp = p->next;
|
||
break;
|
||
}
|
||
if (q == NULL)
|
||
pp = &p->next;
|
||
}
|
||
*pp = edir->pcrel_relocs_copied;
|
||
}
|
||
XMOVOPZ (pcrel_relocs_copied, =, NULL);
|
||
}
|
||
XMOVE (gotplt_refcount);
|
||
XMOVE (gotplt_offset);
|
||
XMOVE (reg_got_refcount);
|
||
XMOVE (tprel_refcount);
|
||
XMOVE (dtp_refcount);
|
||
#undef XMOVE
|
||
#undef XMOVOPZ
|
||
|
||
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_check_relocs (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
struct elf_cris_link_hash_table * htab;
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *sreloc;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
sgot = NULL;
|
||
srelgot = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
unsigned long r_symndx;
|
||
enum elf_cris_reloc_type r_type;
|
||
bfd_signed_vma got_element_size = 4;
|
||
unsigned long r_symndx_lgot = INT_MAX;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
h = NULL;
|
||
r_symndx_lgot = LGOT_REG_NDX (r_symndx);
|
||
}
|
||
else
|
||
{
|
||
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;
|
||
}
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
/* Some relocs require linker-created sections; we need to hang them
|
||
on the first input bfd we found that contained dynamic relocs. */
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_32_DTPREL:
|
||
if ((sec->flags & SEC_ALLOC) == 0)
|
||
/* This'd be a .dtpreld entry in e.g. debug info. We have
|
||
several different switch statements below, but none of
|
||
that is needed; we need no preparations for resolving
|
||
R_CRIS_32_DTPREL into a non-allocated section (debug
|
||
info), so let's just move on to the next
|
||
relocation. */
|
||
continue;
|
||
/* Fall through. */
|
||
case R_CRIS_16_DTPREL:
|
||
/* The first .got.plt entry is right after the R_CRIS_DTPMOD
|
||
entry at index 3. */
|
||
if (htab->dtpmod_refcount == 0)
|
||
htab->next_gotplt_entry += 8;
|
||
|
||
htab->dtpmod_refcount++;
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
case R_CRIS_32_GOTREL:
|
||
case R_CRIS_32_PLT_GOTREL:
|
||
case R_CRIS_32_PLT_PCREL:
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
if (dynobj == NULL)
|
||
{
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
|
||
/* We could handle this if we can get a handle on the
|
||
output bfd in elf_cris_adjust_dynamic_symbol. Failing
|
||
that, we must insist on dynobj being a specific mach. */
|
||
if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A:\n v10/v32 compatible object %s"
|
||
" must not contain a PIC relocation"),
|
||
abfd, sec);
|
||
return FALSE;
|
||
}
|
||
|
||
/* Create the .got section, so we can assume it's always
|
||
present whenever there's a dynobj. */
|
||
if (!_bfd_elf_create_got_section (dynobj, info))
|
||
return FALSE;
|
||
}
|
||
|
||
if (sgot == NULL)
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
bfd_size_type amt;
|
||
|
||
/* We use index local_got_refcounts[-1] to count all
|
||
GOT-relative relocations that do not have explicit
|
||
GOT entries. */
|
||
amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
|
||
amt *= sizeof (bfd_signed_vma);
|
||
local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
|
||
if (local_got_refcounts == NULL)
|
||
return FALSE;
|
||
|
||
local_got_refcounts++;
|
||
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* Some relocs require a global offset table (but perhaps not a
|
||
specific GOT entry). */
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_16_DTPREL:
|
||
case R_CRIS_32_DTPREL:
|
||
/* Not requesting .got.rela for an executable: the contents
|
||
of the first entry is constant there. For a shared
|
||
library, we need .got.rela for the R_CRIS_DTPMOD
|
||
relocation at index 3. */
|
||
if (!info->shared)
|
||
break;
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
/* Fall through. */
|
||
|
||
/* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
|
||
entry only for local symbols. Unfortunately, we don't know
|
||
until later on if there's a version script that forces the
|
||
symbol local. We must have the .rela.got section in place
|
||
before we know if the symbol looks global now, so we need
|
||
to treat the reloc just like for R_CRIS_16_GOT and
|
||
R_CRIS_32_GOT. */
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section_with_flags (dynobj,
|
||
".rela.got",
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY));
|
||
if (srelgot == NULL
|
||
|| !bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return FALSE;
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* Warn and error for invalid input. */
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_TPREL:
|
||
case R_CRIS_16_TPREL:
|
||
case R_CRIS_32_GD:
|
||
if (info->shared)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A:\n relocation %s not valid"
|
||
" in a shared object;"
|
||
" typically an option mixup, recompile with -fPIC"),
|
||
abfd,
|
||
sec,
|
||
cris_elf_howto_table[r_type].name);
|
||
/* Don't return FALSE here; we want messages for all of
|
||
these and the error behavior is ungraceful
|
||
anyway. */
|
||
}
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
/* These are requests for tls_index entries, run-time R_CRIS_DTP. */
|
||
got_element_size = 8;
|
||
r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
|
||
break;
|
||
|
||
case R_CRIS_16_DTPREL:
|
||
case R_CRIS_32_DTPREL:
|
||
/* These two just request for the constant-index
|
||
module-local tls_index-sized GOT entry, which we add
|
||
elsewhere. */
|
||
break;
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
|
||
|
||
/* Those relocs also require that a DSO is of type
|
||
Initial Exec. Like other targets, we don't reset this
|
||
flag even if the relocs are GC:ed away. */
|
||
if (info->shared)
|
||
info->flags |= DF_STATIC_TLS;
|
||
break;
|
||
|
||
/* Let's list the other assembler-generated TLS-relocs too,
|
||
just to show that they're not forgotten. */
|
||
case R_CRIS_16_TPREL:
|
||
case R_CRIS_32_TPREL:
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_16_GOTPLT:
|
||
case R_CRIS_32_GOTPLT:
|
||
/* Mark that we need a GOT entry if the PLT entry (and its GOT
|
||
entry) is eliminated. We can only do this for a non-local
|
||
symbol. */
|
||
if (h != NULL)
|
||
{
|
||
elf_cris_hash_entry (h)->gotplt_refcount++;
|
||
goto handle_gotplt_reloc;
|
||
}
|
||
/* If h is NULL then this is a local symbol, and we must make a
|
||
GOT entry for it, so handle it like a GOT reloc. */
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
/* This symbol requires a global offset table entry. */
|
||
if (h != NULL)
|
||
{
|
||
if (h->got.refcount == 0)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/* Update the sum of reloc counts for this symbol. */
|
||
h->got.refcount++;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_16_GOT:
|
||
case R_CRIS_32_GOT:
|
||
if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
|
||
{
|
||
/* Allocate space in the .got section. */
|
||
sgot->size += got_element_size;
|
||
/* Allocate relocation space. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
elf_cris_hash_entry (h)->reg_got_refcount++;
|
||
break;
|
||
|
||
case R_CRIS_32_GD:
|
||
case R_CRIS_16_GOT_GD:
|
||
case R_CRIS_32_GOT_GD:
|
||
if (elf_cris_hash_entry (h)->dtp_refcount == 0)
|
||
{
|
||
/* Allocate space in the .got section. */
|
||
sgot->size += got_element_size;
|
||
/* Allocate relocation space. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
elf_cris_hash_entry (h)->dtp_refcount++;
|
||
break;
|
||
|
||
case R_CRIS_32_IE:
|
||
case R_CRIS_32_GOT_TPREL:
|
||
case R_CRIS_16_GOT_TPREL:
|
||
if (elf_cris_hash_entry (h)->tprel_refcount == 0)
|
||
{
|
||
/* Allocate space in the .got section. */
|
||
sgot->size += got_element_size;
|
||
/* Allocate relocation space. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
elf_cris_hash_entry (h)->tprel_refcount++;
|
||
break;
|
||
|
||
default:
|
||
BFD_FAIL ();
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* This is a global offset table entry for a local symbol. */
|
||
if (local_got_refcounts[r_symndx_lgot] == 0)
|
||
{
|
||
sgot->size += got_element_size;
|
||
if (info->shared)
|
||
{
|
||
/* If we are generating a shared object, we need
|
||
to output a R_CRIS_RELATIVE reloc so that the
|
||
dynamic linker can adjust this GOT entry.
|
||
Similarly for non-regular got entries. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
/* Update the reloc-specific count. */
|
||
local_got_refcounts[r_symndx_lgot]++;
|
||
|
||
/* This one is the sum of all the others. */
|
||
local_got_refcounts[r_symndx]++;
|
||
}
|
||
break;
|
||
|
||
case R_CRIS_16_DTPREL:
|
||
case R_CRIS_32_DTPREL:
|
||
case R_CRIS_32_GOTREL:
|
||
/* This reference requires a global offset table.
|
||
FIXME: The actual refcount isn't used currently; the .got
|
||
section can't be removed if there were any references in the
|
||
input. */
|
||
local_got_refcounts[-1]++;
|
||
break;
|
||
|
||
handle_gotplt_reloc:
|
||
|
||
case R_CRIS_32_PLT_GOTREL:
|
||
/* This reference requires a global offset table. */
|
||
local_got_refcounts[-1]++;
|
||
/* Fall through. */
|
||
|
||
case R_CRIS_32_PLT_PCREL:
|
||
/* 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 which is
|
||
never referenced by a dynamic object, in which case we
|
||
don't need to generate a procedure linkage table entry
|
||
after all. */
|
||
|
||
/* Beware: if we'd check for visibility of the symbol here
|
||
(and not marking the need for a PLT when non-visible), we'd
|
||
get into trouble with keeping handling consistent with
|
||
regards to relocs found before definition and GOTPLT
|
||
handling. Eliminable PLT entries will be dealt with later
|
||
anyway. */
|
||
if (h == NULL)
|
||
continue;
|
||
|
||
h->needs_plt = 1;
|
||
h->plt.refcount++;
|
||
break;
|
||
|
||
case R_CRIS_8:
|
||
case R_CRIS_16:
|
||
case R_CRIS_32:
|
||
/* Let's help debug shared library creation. Any of these
|
||
relocs *can* be used in shared libs, but pages containing
|
||
them cannot be shared, so they're not appropriate for
|
||
common use. Don't warn for sections we don't care about,
|
||
such as debug sections or non-constant sections. We
|
||
can't help tables of (global) function pointers, for
|
||
example, though they must be emitted in a (writable) data
|
||
section to avoid having impure text sections. */
|
||
if (info->shared
|
||
&& (sec->flags & SEC_ALLOC) != 0
|
||
&& (sec->flags & SEC_READONLY) != 0)
|
||
{
|
||
/* FIXME: How do we make this optionally a warning only? */
|
||
(*_bfd_error_handler)
|
||
(_("%B, section %A:\n relocation %s should not"
|
||
" be used in a shared object; recompile with -fPIC"),
|
||
abfd,
|
||
sec,
|
||
cris_elf_howto_table[r_type].name);
|
||
}
|
||
if (h != NULL)
|
||
{
|
||
h->non_got_ref = 1;
|
||
|
||
/* Make sure a plt entry is created for this symbol if it
|
||
turns out to be a function defined by a dynamic object. */
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
h->plt.refcount++;
|
||
}
|
||
|
||
/* If we are creating a shared library and this is not a local
|
||
symbol, we need to copy the reloc into the shared library.
|
||
However when linking with -Bsymbolic and this is a global
|
||
symbol which is defined in an object we are including in the
|
||
link (i.e., DEF_REGULAR is set), then we can resolve the
|
||
reloc directly. 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. */
|
||
|
||
/* No need to do anything if we're not creating a shared object. */
|
||
if (! info->shared)
|
||
break;
|
||
|
||
/* We don't need to handle relocs into sections not going into
|
||
the "real" output. */
|
||
if ((sec->flags & SEC_ALLOC) == 0)
|
||
break;
|
||
|
||
/* We may need to create a reloc section in the dynobj and made room
|
||
for this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = _bfd_elf_make_dynamic_reloc_section
|
||
(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
|
||
|
||
if (sreloc == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
if (sec->flags & SEC_READONLY)
|
||
info->flags |= DF_TEXTREL;
|
||
|
||
sreloc->size += sizeof (Elf32_External_Rela);
|
||
break;
|
||
|
||
case R_CRIS_8_PCREL:
|
||
case R_CRIS_16_PCREL:
|
||
case R_CRIS_32_PCREL:
|
||
if (h != NULL)
|
||
{
|
||
h->non_got_ref = 1;
|
||
|
||
/* Make sure a plt entry is created for this symbol if it
|
||
turns out to be a function defined by a dynamic object. */
|
||
if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
h->plt.refcount++;
|
||
}
|
||
|
||
/* If we are creating a shared library and this is not a local
|
||
symbol, we need to copy the reloc into the shared library.
|
||
However when linking with -Bsymbolic and this is a global
|
||
symbol which is defined in an object we are including in the
|
||
link (i.e., DEF_REGULAR is set), then we can resolve the
|
||
reloc directly. 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. */
|
||
|
||
/* No need to do anything if we're not creating a shared object. */
|
||
if (! info->shared)
|
||
break;
|
||
|
||
/* We don't need to handle relocs into sections not going into
|
||
the "real" output. */
|
||
if ((sec->flags & SEC_ALLOC) == 0)
|
||
break;
|
||
|
||
/* If the symbol is local, then we know already we can
|
||
eliminate the reloc. */
|
||
if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
||
break;
|
||
|
||
/* If this is with -Bsymbolic and the symbol isn't weak, and
|
||
is defined by an ordinary object (the ones we include in
|
||
this shared library) then we can also eliminate the
|
||
reloc. See comment above for more eliminable cases which
|
||
we can't identify at this time. */
|
||
if (info->symbolic
|
||
&& h->root.type != bfd_link_hash_defweak
|
||
&& h->def_regular)
|
||
break;
|
||
|
||
/* We may need to create a reloc section in the dynobj and made room
|
||
for this reloc. */
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = _bfd_elf_make_dynamic_reloc_section
|
||
(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
|
||
|
||
if (sreloc == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
sreloc->size += sizeof (Elf32_External_Rela);
|
||
|
||
/* We count the number of PC relative relocations we have
|
||
entered for this symbol, so that we can discard them
|
||
again if the symbol is later defined by a regular object.
|
||
We know that h is really a pointer to an
|
||
elf_cris_link_hash_entry. */
|
||
{
|
||
struct elf_cris_link_hash_entry *eh;
|
||
struct elf_cris_pcrel_relocs_copied *p;
|
||
|
||
eh = elf_cris_hash_entry (h);
|
||
|
||
for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
|
||
if (p->section == sec)
|
||
break;
|
||
|
||
if (p == NULL)
|
||
{
|
||
p = ((struct elf_cris_pcrel_relocs_copied *)
|
||
bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
|
||
if (p == NULL)
|
||
return FALSE;
|
||
p->next = eh->pcrel_relocs_copied;
|
||
eh->pcrel_relocs_copied = p;
|
||
p->section = sec;
|
||
p->count = 0;
|
||
p->r_type = r_type;
|
||
}
|
||
|
||
++p->count;
|
||
}
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_CRIS_GNU_VTINHERIT:
|
||
if (!bfd_elf_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_CRIS_GNU_VTENTRY:
|
||
BFD_ASSERT (h != NULL);
|
||
if (h != NULL
|
||
&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
case R_CRIS_16_TPREL:
|
||
case R_CRIS_32_TPREL:
|
||
/* Already warned above, when necessary. */
|
||
break;
|
||
|
||
default:
|
||
/* Other relocs do not appear here. */
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_cris_link_hash_table * htab;
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd_boolean plt;
|
||
bfd_boolean relocs;
|
||
|
||
htab = elf_cris_hash_table (info);
|
||
if (htab == NULL)
|
||
return FALSE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (info->executable)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Adjust all expected GOTPLT uses to use a GOT entry instead. */
|
||
elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
|
||
info);
|
||
|
||
/* We may have created entries in the .rela.got section.
|
||
However, if we are not creating the dynamic sections, we will
|
||
not actually use these entries. Reset the size of .rela.got,
|
||
which will cause it to get stripped from the output file
|
||
below. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (s != NULL)
|
||
s->size = 0;
|
||
}
|
||
|
||
/* If this is a -Bsymbolic shared link, then we need to discard all PC
|
||
relative relocs against symbols defined in a regular object. We
|
||
allocated space for them in the check_relocs routine, but we will not
|
||
fill them in in the relocate_section routine. We also discard space
|
||
for relocs that have become for local symbols due to symbol
|
||
visibility changes. For programs, we discard space for relocs for
|
||
symbols not referenced by any dynamic object. */
|
||
if (info->shared)
|
||
elf_cris_link_hash_traverse (htab,
|
||
elf_cris_discard_excess_dso_dynamics,
|
||
info);
|
||
else
|
||
elf_cris_link_hash_traverse (htab,
|
||
elf_cris_discard_excess_program_dynamics,
|
||
info);
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
plt = FALSE;
|
||
relocs = FALSE;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
if (strcmp (name, ".plt") == 0)
|
||
{
|
||
/* Remember whether there is a PLT. */
|
||
plt = s->size != 0;
|
||
}
|
||
else if (strcmp (name, ".got.plt") == 0)
|
||
{
|
||
/* The .got.plt contains the .got header as well as the
|
||
actual .got.plt contents. The .got header may contain a
|
||
R_CRIS_DTPMOD entry at index 3. */
|
||
s->size += htab->dtpmod_refcount != 0
|
||
? 8 : 0;
|
||
}
|
||
else if (CONST_STRNEQ (name, ".rela"))
|
||
{
|
||
if (strcmp (name, ".rela.got") == 0
|
||
&& htab->dtpmod_refcount != 0
|
||
&& info->shared)
|
||
s->size += sizeof (Elf32_External_Rela);
|
||
|
||
if (s->size != 0)
|
||
{
|
||
/* Remember whether there are any reloc sections other
|
||
than .rela.plt. */
|
||
if (strcmp (name, ".rela.plt") != 0)
|
||
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 if (! CONST_STRNEQ (name, ".got")
|
||
&& strcmp (name, ".dynbss") != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (s->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. */
|
||
s->flags |= SEC_EXCLUDE;
|
||
continue;
|
||
}
|
||
|
||
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
||
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 will not write out garbage. For reloc sections,
|
||
this will make entries have the type R_CRIS_NONE. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->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 elf_cris_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_elf_add_dynamic_entry (info, TAG, VAL)
|
||
|
||
if (!info->shared)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return FALSE;
|
||
}
|
||
|
||
if (plt)
|
||
{
|
||
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 (Elf32_External_Rela)))
|
||
return FALSE;
|
||
}
|
||
|
||
if ((info->flags & DF_TEXTREL) != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return FALSE;
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This function is called via elf_cris_link_hash_traverse if we are
|
||
creating a shared object. In the -Bsymbolic case, it discards the
|
||
space allocated to copy PC relative relocs against symbols which
|
||
are defined in regular objects. For the normal non-symbolic case,
|
||
we also discard space for relocs that have become local due to
|
||
symbol visibility changes. We allocated space for them in the
|
||
check_relocs routine, but we won't fill them in in the
|
||
relocate_section routine. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_discard_excess_dso_dynamics (h, inf)
|
||
struct elf_cris_link_hash_entry *h;
|
||
PTR inf;
|
||
{
|
||
struct elf_cris_pcrel_relocs_copied *s;
|
||
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
||
|
||
if (h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
|
||
|
||
/* If a symbol has been forced local or we have found a regular
|
||
definition for the symbolic link case, then we won't be needing
|
||
any relocs. */
|
||
if (h->root.def_regular
|
||
&& (h->root.forced_local
|
||
|| info->symbolic))
|
||
{
|
||
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
||
{
|
||
asection *sreloc
|
||
= _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
|
||
->dynobj,
|
||
s->section,
|
||
/*rela?*/ TRUE);
|
||
sreloc->size -= s->count * sizeof (Elf32_External_Rela);
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* If we have accounted for PC-relative relocs for read-only
|
||
sections, now is the time to warn for them. We can't do it in
|
||
cris_elf_check_relocs, because we don't know the status of all
|
||
symbols at that time (and it's common to force symbols local
|
||
late). */
|
||
|
||
for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
|
||
if ((s->section->flags & SEC_READONLY) != 0)
|
||
{
|
||
/* FIXME: How do we make this optionally a warning only? */
|
||
(*_bfd_error_handler)
|
||
(_("%B, section `%A', to symbol `%s':\n"
|
||
" relocation %s should not be used"
|
||
" in a shared object; recompile with -fPIC"),
|
||
s->section->owner,
|
||
s->section,
|
||
h->root.root.root.string,
|
||
cris_elf_howto_table[s->r_type].name);
|
||
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This function is called via elf_cris_link_hash_traverse if we are *not*
|
||
creating a shared object. We discard space for relocs for symbols put
|
||
in the .got, but which we found we do not have to resolve at run-time. */
|
||
|
||
static bfd_boolean
|
||
elf_cris_discard_excess_program_dynamics (h, inf)
|
||
struct elf_cris_link_hash_entry *h;
|
||
PTR inf;
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
||
|
||
if (h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
|
||
|
||
/* If we're not creating a shared library and have a symbol which is
|
||
referred to by .got references, but the symbol is defined locally,
|
||
(or rather, not defined by a DSO) then lose the reloc for the .got
|
||
(don't allocate room for it). Likewise for relocs for something
|
||
for which we create a PLT. */
|
||
if (!h->root.def_dynamic
|
||
|| h->root.plt.refcount > 0)
|
||
{
|
||
if (h->reg_got_refcount > 0
|
||
/* The size of this section is only valid and in sync with the
|
||
various reference counts if we do dynamic; don't decrement it
|
||
otherwise. */
|
||
&& elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
asection *srelgot;
|
||
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
srelgot->size -= sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
/* If the locally-defined symbol isn't used by a DSO, then we don't
|
||
have to export it as a dynamic symbol. This was already done for
|
||
functions; doing this for all symbols would presumably not
|
||
introduce new problems. Of course we don't do this if we're
|
||
exporting all dynamic symbols. */
|
||
if (! info->export_dynamic
|
||
&& h->root.dynindx != -1
|
||
&& !h->root.def_dynamic
|
||
&& !h->root.ref_dynamic)
|
||
{
|
||
h->root.dynindx = -1;
|
||
_bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
|
||
h->root.dynstr_index);
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Reject a file depending on presence and expectation of prefixed
|
||
underscores on symbols. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
|
||
return FALSE;
|
||
|
||
if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
|
||
return (bfd_get_symbol_leading_char (abfd) == '_');
|
||
else
|
||
return (bfd_get_symbol_leading_char (abfd) == 0);
|
||
}
|
||
|
||
/* Mark presence or absence of leading underscore. Set machine type
|
||
flags from mach type. */
|
||
|
||
static void
|
||
cris_elf_final_write_processing (abfd, linker)
|
||
bfd *abfd;
|
||
bfd_boolean linker ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned long e_flags = elf_elfheader (abfd)->e_flags;
|
||
|
||
e_flags &= ~EF_CRIS_UNDERSCORE;
|
||
if (bfd_get_symbol_leading_char (abfd) == '_')
|
||
e_flags |= EF_CRIS_UNDERSCORE;
|
||
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_cris_v0_v10:
|
||
e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
|
||
break;
|
||
|
||
case bfd_mach_cris_v10_v32:
|
||
e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
|
||
break;
|
||
|
||
case bfd_mach_cris_v32:
|
||
e_flags |= EF_CRIS_VARIANT_V32;
|
||
break;
|
||
|
||
default:
|
||
_bfd_abort (__FILE__, __LINE__,
|
||
_("Unexpected machine number"));
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_flags = e_flags;
|
||
}
|
||
|
||
/* Set the mach type from e_flags value. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_set_mach_from_flags (abfd, flags)
|
||
bfd *abfd;
|
||
unsigned long flags;
|
||
{
|
||
switch (flags & EF_CRIS_VARIANT_MASK)
|
||
{
|
||
case EF_CRIS_VARIANT_ANY_V0_V10:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
|
||
break;
|
||
|
||
case EF_CRIS_VARIANT_V32:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
|
||
break;
|
||
|
||
case EF_CRIS_VARIANT_COMMON_V10_V32:
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
|
||
break;
|
||
|
||
default:
|
||
/* Since we don't recognize them, we obviously can't support them
|
||
with this code; we'd have to require that all future handling
|
||
would be optional. */
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Display the flags field. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_print_private_bfd_data (abfd, ptr)
|
||
bfd *abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
||
|
||
if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
|
||
fprintf (file, _(" [symbols have a _ prefix]"));
|
||
if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
|
||
== EF_CRIS_VARIANT_COMMON_V10_V32)
|
||
fprintf (file, _(" [v10 and v32]"));
|
||
if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
|
||
== EF_CRIS_VARIANT_V32)
|
||
fprintf (file, _(" [v32]"));
|
||
|
||
fputc ('\n', file);
|
||
return TRUE;
|
||
}
|
||
|
||
/* Don't mix files with and without a leading underscore. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
int imach, omach;
|
||
|
||
if (! _bfd_generic_verify_endian_match (ibfd, obfd))
|
||
return FALSE;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
imach = bfd_get_mach (ibfd);
|
||
|
||
if (! elf_flags_init (obfd))
|
||
{
|
||
/* This happens when ld starts out with a 'blank' output file. */
|
||
elf_flags_init (obfd) = TRUE;
|
||
|
||
/* We ignore the linker-set mach, and instead set it according to
|
||
the first input file. This would also happen if we could
|
||
somehow filter out the OUTPUT_ARCH () setting from elf.sc.
|
||
This allows us to keep the same linker config across
|
||
cris(v0..v10) and crisv32. The drawback is that we can't force
|
||
the output type, which might be a sane thing to do for a
|
||
v10+v32 compatibility object. */
|
||
if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
|
||
return FALSE;
|
||
}
|
||
|
||
if (bfd_get_symbol_leading_char (ibfd)
|
||
!= bfd_get_symbol_leading_char (obfd))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(bfd_get_symbol_leading_char (ibfd) == '_'
|
||
? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
|
||
: _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
|
||
ibfd);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
omach = bfd_get_mach (obfd);
|
||
|
||
if (imach != omach)
|
||
{
|
||
/* We can get an incompatible combination only if either is
|
||
bfd_mach_cris_v32, and the other one isn't compatible. */
|
||
if ((imach == bfd_mach_cris_v32
|
||
&& omach != bfd_mach_cris_v10_v32)
|
||
|| (omach == bfd_mach_cris_v32
|
||
&& imach != bfd_mach_cris_v10_v32))
|
||
{
|
||
(*_bfd_error_handler)
|
||
((imach == bfd_mach_cris_v32)
|
||
? _("%B contains CRIS v32 code, incompatible"
|
||
" with previous objects")
|
||
: _("%B contains non-CRIS-v32 code, incompatible"
|
||
" with previous objects"),
|
||
ibfd);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
/* We don't have to check the case where the input is compatible
|
||
with v10 and v32, because the output is already known to be set
|
||
to the other (compatible) mach. */
|
||
if (omach == bfd_mach_cris_v10_v32
|
||
&& ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Do side-effects of e_flags copying to obfd. */
|
||
|
||
static bfd_boolean
|
||
cris_elf_copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
/* Call the base function. */
|
||
if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
|
||
return FALSE;
|
||
|
||
/* If output is big-endian for some obscure reason, stop here. */
|
||
if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
|
||
return FALSE;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
/* Do what we really came here for. */
|
||
return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
|
||
}
|
||
|
||
static enum elf_reloc_type_class
|
||
elf_cris_reloc_type_class (rela)
|
||
const Elf_Internal_Rela *rela;
|
||
{
|
||
enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_CRIS_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_CRIS_JUMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_CRIS_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
/* The elf_backend_got_elt_size worker. For one symbol, we can have up to
|
||
two GOT entries from three types with two different sizes. We handle
|
||
it as a single entry, so we can use the regular offset-calculation
|
||
machinery. */
|
||
|
||
static bfd_vma
|
||
elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
struct elf_link_hash_entry *hr,
|
||
bfd *ibfd,
|
||
unsigned long symndx)
|
||
{
|
||
struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
|
||
bfd_vma eltsiz = 0;
|
||
|
||
/* We may have one regular GOT entry or up to two TLS GOT
|
||
entries. */
|
||
if (h == NULL)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
||
bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
|
||
|
||
BFD_ASSERT (local_got_refcounts != NULL);
|
||
|
||
if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
|
||
{
|
||
/* We can't have a variable referred to both as a regular
|
||
variable and through TLS relocs. */
|
||
BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
|
||
&& local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
|
||
return 4;
|
||
}
|
||
|
||
if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
|
||
eltsiz += 8;
|
||
|
||
if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
|
||
eltsiz += 4;
|
||
}
|
||
else
|
||
{
|
||
struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
|
||
if (hh->reg_got_refcount > 0)
|
||
{
|
||
/* The actual error-on-input is emitted elsewhere. */
|
||
BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
|
||
return 4;
|
||
}
|
||
|
||
if (hh->dtp_refcount > 0)
|
||
eltsiz += 8;
|
||
|
||
if (hh->tprel_refcount > 0)
|
||
eltsiz += 4;
|
||
}
|
||
|
||
/* We're only called when h->got.refcount is non-zero, so we must
|
||
have a non-zero size. */
|
||
BFD_ASSERT (eltsiz != 0);
|
||
return eltsiz;
|
||
}
|
||
|
||
#define ELF_ARCH bfd_arch_cris
|
||
#define ELF_TARGET_ID CRIS_ELF_DATA
|
||
#define ELF_MACHINE_CODE EM_CRIS
|
||
#define ELF_MAXPAGESIZE 0x2000
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_cris_vec
|
||
#define TARGET_LITTLE_NAME "elf32-cris"
|
||
#define elf_symbol_leading_char 0
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto cris_info_to_howto_rela
|
||
#define elf_backend_relocate_section cris_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook cris_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook
|
||
#define elf_backend_plt_sym_val cris_elf_plt_sym_val
|
||
#define elf_backend_check_relocs cris_elf_check_relocs
|
||
#define elf_backend_grok_prstatus cris_elf_grok_prstatus
|
||
#define elf_backend_grok_psinfo cris_elf_grok_psinfo
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_can_refcount 1
|
||
|
||
#define elf_backend_object_p cris_elf_object_p
|
||
#define elf_backend_final_write_processing \
|
||
cris_elf_final_write_processing
|
||
#define bfd_elf32_bfd_print_private_bfd_data \
|
||
cris_elf_print_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
cris_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_copy_private_bfd_data \
|
||
cris_elf_copy_private_bfd_data
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup
|
||
#define bfd_elf32_bfd_reloc_name_lookup cris_reloc_name_lookup
|
||
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
elf_cris_link_hash_table_create
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
elf_cris_adjust_dynamic_symbol
|
||
#define elf_backend_copy_indirect_symbol \
|
||
elf_cris_copy_indirect_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
elf_cris_size_dynamic_sections
|
||
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
elf_cris_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
elf_cris_finish_dynamic_sections
|
||
#define elf_backend_create_dynamic_sections \
|
||
_bfd_elf_create_dynamic_sections
|
||
#define bfd_elf32_bfd_final_link \
|
||
bfd_elf_gc_common_final_link
|
||
#define elf_backend_hide_symbol elf_cris_hide_symbol
|
||
#define elf_backend_reloc_type_class elf_cris_reloc_type_class
|
||
|
||
#define elf_backend_want_got_plt 1
|
||
#define elf_backend_plt_readonly 1
|
||
#define elf_backend_want_plt_sym 0
|
||
#define elf_backend_got_header_size 12
|
||
#define elf_backend_got_elt_size elf_cris_got_elt_size
|
||
|
||
/* Later, we my want to optimize RELA entries into REL entries for dynamic
|
||
linking and libraries (if it's a win of any significance). Until then,
|
||
take the easy route. */
|
||
#define elf_backend_may_use_rel_p 0
|
||
#define elf_backend_may_use_rela_p 1
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#include "elf32-target.h"
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#undef TARGET_LITTLE_NAME
|
||
#undef elf_symbol_leading_char
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
|
||
#define TARGET_LITTLE_NAME "elf32-us-cris"
|
||
#define elf_symbol_leading_char '_'
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_us_cris_bed
|
||
|
||
#include "elf32-target.h"
|