/* CRIS-specific support for 32-bit ELF.
- Copyright (C) 2000 Free Software Foundation, Inc.
+ Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ 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 file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is 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.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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 "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/cris.h"
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 *, Elf32_Internal_Rela *));
+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 boolean cris_elf_relocate_section
+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 **));
PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, bfd_vma));
-static boolean cris_elf_gc_sweep_hook
+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 asection * cris_elf_gc_mark_hook
- PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-
-static boolean cris_elf_object_p PARAMS ((bfd *));
-
-static void cris_elf_final_write_processing PARAMS ((bfd *, boolean));
-
-static boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
-
-static boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+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 [] =
{
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
- false, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_CRIS_NONE", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_CRIS_8", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x0000, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_CRIS_16", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
+ 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ /* 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 */
+ FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
- /* An 8 bit absolute relocation. */
+ /* 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 */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ cris_elf_pcrel_reloc, /* special_function */
"R_CRIS_8_PCREL", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0x0000, /* src_mask */
0x00ff, /* dst_mask */
- false), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
- /* A 16 bit absolute relocation. */
+ /* 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 */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_CRIS_16", /* name */
- false, /* partial_inplace */
+ cris_elf_pcrel_reloc, /* special_function */
+ "R_CRIS_16_PCREL", /* name */
+ FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0x0000ffff, /* dst_mask */
- false), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
- /* A 32 bit absolute relocation. */
+ /* 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 */
+ TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_CRIS_32", /* name */
- false, /* partial_inplace */
+ cris_elf_pcrel_reloc, /* special_function */
+ "R_CRIS_32_PCREL", /* name */
+ FALSE, /* partial_inplace */
0x00000000, /* src_mask */
0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
+ TRUE), /* pcrel_offset */
- /* GNU extension to record C++ vtable hierarchy */
- HOWTO (R_CRIS_GNU_VTINHERIT, /* type */
+ /* 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 */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
NULL, /* special_function */
"R_CRIS_GNU_VTINHERIT", /* name */
- false, /* partial_inplace */
+ FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false), /* pcrel_offset */
+ FALSE), /* pcrel_offset */
- /* GNU extension to record C++ vtable member usage */
- HOWTO (R_CRIS_GNU_VTENTRY, /* type */
+ /* 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 */
+ 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 */
+ 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 */
+ 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 */
};
\f
/* Map BFD reloc types to CRIS ELF reloc types. */
{ 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_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 }
};
static reloc_howto_type *
{
unsigned int i;
- for (i = sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]);
- --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;
}
cris_info_to_howto_rela (abfd, cache_ptr, dst)
bfd * abfd ATTRIBUTE_UNUSED;
arelent * cache_ptr;
- Elf32_Internal_Rela * dst;
+ Elf_Internal_Rela * dst;
{
unsigned int r_type;
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);
+}
+\f
+/* 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_pid = 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_pid = 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;
+}
+\f
+/* 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 */
+};
+\f
+/* 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;
+};
+
+/* 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;
+};
+
+/* 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;
+};
+
+/* Traverse a CRIS ELF linker hash table. */
+
+#define elf_cris_link_hash_traverse(table, func, info) \
+ (elf_link_hash_traverse \
+ (&(table)->root, \
+ (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* Get the CRIS ELF linker hash table from a link_info structure. */
+
+#define elf_cris_hash_table(p) \
+ ((struct elf_cris_link_hash_table *) (p)->hash)
+
+/* Create an entry in a CRIS ELF linker hash table. */
+
+static struct bfd_hash_entry *
+elf_cris_link_hash_newfunc (entry, table, string)
+ 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;
+ }
+
+ 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 (abfd)
+ 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)))
+ {
+ 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;
+
+ return &ret->root.root;
+}
\f
/* Perform a single relocation. By default we use the standard BFD
- routines, but we might have to do a few relocs ourselves in the future. */
+ routines, with a few tweaks. */
static bfd_reloc_status_type
cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
Elf_Internal_Rela * rel;
bfd_vma relocation;
{
- bfd_reloc_status_type r
- = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ bfd_reloc_status_type r;
+
+ /* 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 (ELF32_R_TYPE (rel->r_info))
+ {
+ /* 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;
/* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
copied, for further comments. */
-static boolean
+static bfd_boolean
cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
- 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;
-{
- Elf_Internal_Shdr * symtab_hdr;
- struct elf_link_hash_entry ** sym_hashes;
- Elf_Internal_Rela * rel;
- Elf_Internal_Rela * relend;
-
+ 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;
+{
+ 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;
+
+ 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;
- /* It seems this can happen with erroneous or unsupported input (mixing
- a.out and elf in an archive, for example.) */
- if (sym_hashes == NULL)
- return false;
+ sgot = NULL;
+ splt = NULL;
+ sreloc = 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 * name = NULL;
- int r_type;
-
+ 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;
+ int 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);
-
- if (info->relocateable)
- {
- /* This is a relocateable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
-
- if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- {
- sec = local_sections [r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
-
- continue;
- }
- /* This is a final link. */
- howto = cris_elf_howto_table + ELF32_R_TYPE (rel->r_info);
+ 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 = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
-
- name = bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name);
- name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
-#if 0
- fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
- sec->name, name, sym->st_name,
- sec->output_section->vma, sec->output_offset,
- sym->st_value, rel->r_addend);
-#endif
+ 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
{
- 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;
+ 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);
+
+ 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;
- name = h->root.root.string;
-
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
{
- sec = h->root.u.def.section;
- relocation = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
-#if 0
- fprintf (stderr,
- "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
- sec->name, name, h->root.u.def.value,
- sec->output_section->vma, sec->output_offset, relocation);
-#endif
- }
- else if (h->root.type == bfd_link_hash_undefweak)
- {
-#if 0
- fprintf (stderr, "undefined: sec: %s, name: %s\n",
- sec->name, name);
-#endif
- relocation = 0;
+ /* 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;
+ }
}
- else if (info->shared
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- relocation = 0;
- else
+ }
+
+ if (sec != NULL && elf_discarded_section (sec))
+ {
+ /* For relocs against symbols from removed linkonce sections,
+ or sections discarded by a linker script, we just want the
+ section contents zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ rel->r_info = 0;
+ rel->r_addend = 0;
+ continue;
+ }
+
+ 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)
+ {
+ asection *s;
+ Elf_Internal_Rela outrel;
+ bfd_byte *loc;
+
+ s = bfd_get_section_by_name (dynobj, ".rela.got");
+ BFD_ASSERT (s != 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 = s->contents;
+ loc += s->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)
{
- if (! ((*info->callbacks->undefined_symbol)
- (info, h->root.root.string, input_bfd,
- input_section, rel->r_offset, true)))
- return false;
-#if 0
- fprintf (stderr, "unknown: name: %s\n", name);
-#endif
- relocation = 0;
+ /* 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)
+ break;
+
+ /* Fall through. */
+ case R_CRIS_8:
+ case R_CRIS_16:
+ case R_CRIS_32:
+ if (info->shared
+ && r_symndx != 0
+ && (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->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)
+ {
+ const char *name;
+
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd,
+ elf_elfheader (input_bfd)->e_shstrndx,
+ elf_section_data (input_section)->rel_hdr.sh_name));
+ if (name == NULL)
+ return FALSE;
+
+ BFD_ASSERT (CONST_STRNEQ (name, ".rela")
+ && strcmp (bfd_get_section_name (input_bfd,
+ input_section),
+ name + 5) == 0);
+
+ sreloc = bfd_get_section_by_name (dynobj, name);
+
+ /* That 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_error_handler)
+ (_("%B: Internal inconsistency; no relocation section %s"),
+ input_bfd,
+ name);
+
+ 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)
+ 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)
+ {
+ struct elf_cris_link_hash_table *htab;
+ htab = elf_cris_hash_table (info);
+ 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;
}
-
+
r = cris_final_link_relocate (howto, input_bfd, input_section,
contents, rel, relocation);
{
case bfd_reloc_overflow:
r = info->callbacks->reloc_overflow
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset);
+ (info, (h ? &h->root : NULL), symname, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
break;
-
+
case bfd_reloc_undefined:
r = info->callbacks->undefined_symbol
- (info, name, input_bfd, input_section, rel->r_offset,
- true);
+ (info, symname, input_bfd, input_section, rel->r_offset,
+ TRUE);
break;
-
+
case bfd_reloc_outofrange:
msg = _("internal error: out of range error");
break;
if (msg)
r = info->callbacks->warning
- (info, msg, name, input_bfd, input_section, rel->r_offset);
+ (info, msg, symname, input_bfd, input_section, rel->r_offset);
if (! r)
- return false;
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+\f
+/* Finish up dynamic symbol handling. We set the contents of various
+ dynamic sections here. */
+
+static bfd_boolean
+elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+{
+ bfd *dynobj;
+
+ /* 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;
+
+ /* 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 *sgot;
+ asection *srela;
+ bfd_vma got_base;
+
+ bfd_vma gotplt_offset
+ = ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+ bfd_boolean has_gotplt = gotplt_offset != 0;
+
+ /* Get the index in the procedure linkage table which
+ corresponds to this symbol. This is the index of this symbol
+ in all the symbols for which we are making plt entries. The
+ first entry in the procedure linkage table is reserved. */
+ /* We have to count backwards here, and the result is only valid as
+ an index into .got.plt and its relocations. FIXME: Constants... */
+ bfd_vma gotplt_index = 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 + elf_cris_hash_table(info)->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");
+ sgot = bfd_get_section_by_name (dynobj, ".got");
+ 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,
+ gotplt_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 + gotplt_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
+ && (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;
+}
+\f
+/* Finish up the dynamic sections. */
+
+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);
}
- return true;
+ elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+
+ return TRUE;
}
\f
/* Return the section that should be marked against GC for a given
relocation. */
static asection *
-cris_elf_gc_mark_hook (abfd, info, rel, h, sym)
- bfd * abfd;
- struct bfd_link_info * info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela * rel;
- struct elf_link_hash_entry * h;
- Elf_Internal_Sym * sym;
+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)
{
if (h != NULL)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_CRIS_GNU_VTINHERIT:
+ case R_CRIS_GNU_VTENTRY:
+ return NULL;
+ }
+
+ 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)
+{
+ 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;
+
+ 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++)
{
- switch (ELF32_R_TYPE (rel->r_info))
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h = NULL;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
{
- case R_CRIS_GNU_VTINHERIT:
- case R_CRIS_GNU_VTENTRY:
- break;
+ 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;
+ }
- default:
- switch (h->root.type)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_CRIS_16_GOT:
+ case R_CRIS_32_GOT:
+ if (h != NULL)
{
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
+ if (h->got.refcount > 0)
+ {
+ --h->got.refcount;
+ if (h->got.refcount == 0)
+ {
+ /* We don't need the .got entry any more. */
+ sgot->size -= 4;
+ srelgot->size -= sizeof (Elf32_External_Rela);
+ }
+ }
+ break;
+ }
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
+ local_got_reloc:
+ if (local_got_refcounts != NULL)
+ {
+ if (local_got_refcounts[r_symndx] > 0)
+ {
+ --local_got_refcounts[r_symndx];
+ if (local_got_refcounts[r_symndx] == 0)
+ {
+ /* We don't need the .got entry any more. */
+ sgot->size -= 4;
+ if (info->shared)
+ srelgot->size -= sizeof (Elf32_External_Rela);
+ }
+ }
+ }
+ break;
- default:
- 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;
+
+ default:
+ break;
}
}
+
+ return TRUE;
+}
+
+/* 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->root.got.refcount > 0)
+ {
+ /* There's a GOT entry for this symbol. Just adjust the refcount.
+ Probably not necessary at this stage, but keeping it accurate
+ helps avoiding surprises later. */
+ h->root.got.refcount += h->gotplt_refcount;
+ h->gotplt_refcount = 0;
+ }
else
{
- if (!(elf_bad_symtab (abfd)
- && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
- && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
- && sym->st_shndx != SHN_COMMON))
- {
- return bfd_section_from_elf_index (abfd, sym->st_shndx);
- }
+ /* 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 an accurate refcount there. */
+ h->root.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 NULL;
+ return TRUE;
}
-/* Update the got entry reference counts for the section being removed. */
+/* 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.
-static boolean
-cris_elf_gc_sweep_hook (abfd, info, sec, relocs)
- bfd * abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info * info ATTRIBUTE_UNUSED;
- asection * sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
+ - 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;
{
- return true;
+ 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;
}
-/* Look through the relocs for a section during the first phase.
- Since we don't do .gots or .plts, we just need to consider the
- virtual table relocs for gc. */
-
-static boolean
+/* 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 (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ bfd *dynobj;
+ asection *s;
+ bfd_size_type plt_entry_size;
+
+ 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
+ = elf_cris_hash_table (info)->next_gotplt_entry;
+ elf_cris_hash_table (info)->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);
+}
+
+/* Look through the relocs for a section during the first phase. */
+
+static bfd_boolean
cris_elf_check_relocs (abfd, info, sec, relocs)
bfd *abfd;
struct bfd_link_info *info;
asection *sec;
const Elf_Internal_Rela *relocs;
{
+ bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
-
- if (info->relocateable)
- return true;
-
+ asection *sgot;
+ asection *srelgot;
+ asection *sreloc;
+
+ if (info->relocatable)
+ return TRUE;
+
+ dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
- sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
- if (!elf_bad_symtab (abfd))
- sym_hashes_end -= symtab_hdr->sh_info;
-
+ 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;
+
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- switch (ELF32_R_TYPE (rel->r_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);
+
+ /* 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_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;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ /* Some relocs require a global offset table (but perhaps not a
+ specific GOT entry). */
+ switch (r_type)
+ {
+ /* 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;
+ }
+ }
+ /* Fall through. */
+
+ case R_CRIS_32_GOTREL:
+ case R_CRIS_32_PLT_GOTREL:
+ 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 = 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;
+ }
+
+ 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)
+ {
+ ((struct elf_cris_link_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_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;
+ }
+
+ /* Allocate space in the .got section. */
+ sgot->size += 4;
+ /* Allocate relocation space. */
+ srelgot->size += sizeof (Elf32_External_Rela);
+ }
+ h->got.refcount++;
+ }
+ else
+ {
+ /* This is a global offset table entry for a local symbol. */
+ if (local_got_refcounts[r_symndx] == 0)
+ {
+ sgot->size += 4;
+ 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. */
+ srelgot->size += sizeof (Elf32_External_Rela);
+ }
+ }
+ local_got_refcounts[r_symndx]++;
+ }
+ break;
+
+ 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. 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 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);
+ }
+ /* Fall through. */
+
+ 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;
+
+ /* We can only eliminate PC-relative relocs. */
+ if (r_type == R_CRIS_8_PCREL
+ || r_type == R_CRIS_16_PCREL
+ || r_type == R_CRIS_32_PCREL)
+ {
+ /* If the symbol is local, then 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;
+
+ if ((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);
+ }
+ }
+
+ /* We create a reloc section in dynobj and make room for this
+ reloc. */
+ if (sreloc == NULL)
+ {
+ const char *name;
+
+ name = (bfd_elf_string_from_elf_section
+ (abfd,
+ elf_elfheader (abfd)->e_shstrndx,
+ elf_section_data (sec)->rel_hdr.sh_name));
+ if (name == NULL)
+ return FALSE;
+
+ BFD_ASSERT (CONST_STRNEQ (name, ".rela")
+ && strcmp (bfd_get_section_name (abfd, sec),
+ name + 5) == 0);
+
+ sreloc = bfd_get_section_by_name (dynobj, name);
+ if (sreloc == NULL)
+ {
+ sreloc = bfd_make_section_with_flags (dynobj, name,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY));
+ if (sreloc == NULL
+ || !bfd_set_section_alignment (dynobj, sreloc, 2))
+ return FALSE;
+ }
+ if (sec->flags & SEC_READONLY)
+ info->flags |= DF_TEXTREL;
+ }
+
+ sreloc->size += sizeof (Elf32_External_Rela);
+
+ /* If we are linking with -Bsymbolic, 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. */
+ if ((r_type == R_CRIS_8_PCREL
+ || r_type == R_CRIS_16_PCREL
+ || r_type == R_CRIS_32_PCREL)
+ && info->symbolic)
+ {
+ struct elf_cris_link_hash_entry *eh;
+ struct elf_cris_pcrel_relocs_copied *p;
+
+ eh = (struct elf_cris_link_hash_entry *) h;
+
+ for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
+ if (p->section == sreloc)
+ 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 = sreloc;
+ p->count = 0;
+ }
+
+ ++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_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
- return false;
+ 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:
- if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
- return false;
+ BFD_ASSERT (h != NULL);
+ if (h != NULL
+ && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ return FALSE;
break;
+
+ default:
+ /* Other relocs do not appear here. */
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
}
-
- return true;
+
+ return TRUE;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static bfd_boolean
+elf_cris_size_dynamic_sections (output_bfd, info)
+ bfd *output_bfd ATTRIBUTE_UNUSED;
+ struct bfd_link_info *info;
+{
+ bfd *dynobj;
+ asection *s;
+ bfd_boolean plt;
+ bfd_boolean relocs;
+
+ 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 (elf_cris_hash_table (info),
+ elf_cris_adjust_gotplt_to_got,
+ (PTR) 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 (elf_cris_hash_table (info),
+ elf_cris_discard_excess_dso_dynamics,
+ (PTR) info);
+ else
+ elf_cris_link_hash_traverse (elf_cris_hash_table (info),
+ elf_cris_discard_excess_program_dynamics,
+ (PTR) 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 (CONST_STRNEQ (name, ".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)
+ s->section->size -= s->count * sizeof (Elf32_External_Rela);
+ }
+
+ 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->root.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 underscores on symbols. */
+/* Reject a file depending on presence and expectation of prefixed
+ underscores on symbols. */
-static boolean
+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. */
+/* 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;
- boolean linker ATTRIBUTE_UNUSED;
+ 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) == '_')
- elf_elfheader (abfd)->e_flags |= EF_CRIS_UNDERSCORE;
- else
- elf_elfheader (abfd)->e_flags &= ~EF_CRIS_UNDERSCORE;
+ 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 boolean
+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_ASSERT (abfd != NULL && ptr != NULL);
_bfd_elf_print_private_bfd_data (abfd, ptr);
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;
+ return TRUE;
}
/* Don't mix files with and without a leading underscore. */
-static boolean
+static bfd_boolean
cris_elf_merge_private_bfd_data (ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
- flagword old_flags, new_flags;
+ int imach, omach;
- if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
- return false;
+ 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;
+ 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;
-
- /* Set flags according to current bfd_target. */
- cris_elf_final_write_processing (obfd, false);
+ 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;
}
- old_flags = elf_elfheader (obfd)->e_flags;
- new_flags = elf_elfheader (ibfd)->e_flags;
-
- /* Is this good or bad? We'll follow with other excluding flags. */
- if ((old_flags & EF_CRIS_UNDERSCORE) != (new_flags & EF_CRIS_UNDERSCORE))
+ if (bfd_get_symbol_leading_char (ibfd)
+ != bfd_get_symbol_leading_char (obfd))
{
(*_bfd_error_handler)
- ((new_flags & EF_CRIS_UNDERSCORE)
- ? _("%s: uses _-prefixed symbols, but writing file with non-prefixed symbols")
- : _("%s: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
- bfd_get_filename (ibfd));
+ (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;
+ return FALSE;
}
- return true;
+ 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;
+{
+ switch ((int) ELF32_R_TYPE (rela->r_info))
+ {
+ 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;
+ }
}
\f
#define ELF_ARCH bfd_arch_cris
#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_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_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_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
/* 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"
-#define INCLUDED_TARGET_FILE
-
#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"
projects / platform / upstream / binutils.git / blobdiff