4ab8270019
type rather than just assuming entries are ELF. * elf32-sh64.c (sh64_elf_add_symbol_hook): Likewise. * elf64-sh64.c (sh64_elf64_add_symbol_hook): Likewise. * elf64-sparc.c (sparc64_elf_add_symbol_hook): Likewise. * elf64-mmix.c (mmix_elf_add_symbol_hook): Use bfd_link_hash_entry rather than elf_link_hash_entry.
2177 lines
66 KiB
C
2177 lines
66 KiB
C
/* M32R-specific support for 32-bit ELF.
|
||
Copyright 1996, 1997, 1998, 1999, 2000, 2001
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
#include "elf/m32r.h"
|
||
|
||
static bfd_reloc_status_type m32r_elf_10_pcrel_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
||
static bfd_reloc_status_type m32r_elf_do_10_pcrel_reloc
|
||
PARAMS ((bfd *, reloc_howto_type *, asection *,
|
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bfd_byte *, bfd_vma, asection *, bfd_vma, bfd_vma));
|
||
static bfd_reloc_status_type m32r_elf_hi16_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
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static void m32r_elf_relocate_hi16
|
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PARAMS ((bfd *, int, Elf_Internal_Rela *, Elf_Internal_Rela *,
|
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bfd_byte *, bfd_vma));
|
||
bfd_reloc_status_type m32r_elf_lo16_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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bfd_reloc_status_type m32r_elf_generic_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
||
static bfd_reloc_status_type m32r_elf_sda16_reloc
|
||
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
|
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
|
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static void m32r_info_to_howto_rel
|
||
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
|
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boolean _bfd_m32r_elf_section_from_bfd_section
|
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PARAMS ((bfd *, asection *, int *));
|
||
void _bfd_m32r_elf_symbol_processing
|
||
PARAMS ((bfd *, asymbol *));
|
||
static boolean m32r_elf_add_symbol_hook
|
||
PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
|
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const char **, flagword *, asection **, bfd_vma *));
|
||
static boolean m32r_elf_relocate_section
|
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
|
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
|
||
#if 0 /* not yet */
|
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static boolean m32r_elf_relax_delete_bytes
|
||
PARAMS ((bfd *, asection *, bfd_vma, int));
|
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#endif
|
||
static bfd_reloc_status_type m32r_elf_final_sda_base
|
||
PARAMS ((bfd *, struct bfd_link_info *, const char **, bfd_vma *));
|
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static boolean m32r_elf_object_p
|
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PARAMS ((bfd *));
|
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static void m32r_elf_final_write_processing
|
||
PARAMS ((bfd *, boolean));
|
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static boolean m32r_elf_set_private_flags
|
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PARAMS ((bfd *, flagword));
|
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static boolean m32r_elf_merge_private_bfd_data
|
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PARAMS ((bfd *, bfd *));
|
||
static boolean m32r_elf_print_private_bfd_data
|
||
PARAMS ((bfd *, PTR));
|
||
static boolean m32r_elf_gc_sweep_hook
|
||
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
||
const Elf_Internal_Rela *));
|
||
static boolean m32r_elf_check_relocs
|
||
PARAMS ((bfd *, struct bfd_link_info *, asection *,
|
||
const Elf_Internal_Rela *));
|
||
|
||
asection * m32r_elf_gc_mark_hook
|
||
PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
|
||
struct elf_link_hash_entry *, Elf_Internal_Sym *));
|
||
|
||
#define NOP_INSN 0x7000
|
||
#define MAKE_PARALLEL(insn) ((insn) | 0x8000)
|
||
|
||
/* Use REL instead of RELA to save space.
|
||
This only saves space in libraries and object files, but perhaps
|
||
relocs will be put in ROM? All in all though, REL relocs are a pain
|
||
to work with. */
|
||
#define USE_REL
|
||
|
||
static reloc_howto_type m32r_elf_howto_table[] =
|
||
{
|
||
/* This reloc does nothing. */
|
||
HOWTO (R_M32R_NONE, /* type */
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||
0, /* rightshift */
|
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2, /* size (0 = byte, 1 = short, 2 = long) */
|
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32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_M32R_NONE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 16 bit absolute relocation. */
|
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HOWTO (R_M32R_16, /* type */
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||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
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||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
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m32r_elf_generic_reloc,/* special_function */
|
||
"R_M32R_16", /* name */
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||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
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/* A 32 bit absolute relocation. */
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HOWTO (R_M32R_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
|
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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||
m32r_elf_generic_reloc,/* special_function */
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"R_M32R_32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 24 bit address. */
|
||
HOWTO (R_M32R_24, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
24, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_unsigned, /* complain_on_overflow */
|
||
m32r_elf_generic_reloc,/* special_function */
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||
"R_M32R_24", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffff, /* src_mask */
|
||
0xffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* An PC Relative 10-bit relocation, shifted by 2.
|
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This reloc is complicated because relocations are relative to pc & -4.
|
||
i.e. branches in the right insn slot use the address of the left insn
|
||
slot for pc. */
|
||
/* ??? It's not clear whether this should have partial_inplace set or not.
|
||
Branch relaxing in the assembler can store the addend in the insn,
|
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and if bfd_install_relocation gets called the addend may get added
|
||
again. */
|
||
HOWTO (R_M32R_10_PCREL, /* type */
|
||
2, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
10, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
m32r_elf_10_pcrel_reloc, /* special_function */
|
||
"R_M32R_10_PCREL", /* name */
|
||
false, /* partial_inplace */
|
||
0xff, /* src_mask */
|
||
0xff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 18 bit relocation, right shifted by 2. */
|
||
HOWTO (R_M32R_18_PCREL, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_M32R_18_PCREL", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 26 bit relocation, right shifted by 2. */
|
||
/* ??? It's not clear whether this should have partial_inplace set or not.
|
||
Branch relaxing in the assembler can store the addend in the insn,
|
||
and if bfd_install_relocation gets called the addend may get added
|
||
again. */
|
||
HOWTO (R_M32R_26_PCREL, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_M32R_26_PCREL", /* name */
|
||
false, /* partial_inplace */
|
||
0xffffff, /* src_mask */
|
||
0xffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* High 16 bits of address when lower 16 is or'd in. */
|
||
HOWTO (R_M32R_HI16_ULO, /* type */
|
||
16, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
|
||
false, /* pc_relative */
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||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
m32r_elf_hi16_reloc, /* special_function */
|
||
"R_M32R_HI16_ULO", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* High 16 bits of address when lower 16 is added in. */
|
||
HOWTO (R_M32R_HI16_SLO, /* type */
|
||
16, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
m32r_elf_hi16_reloc, /* special_function */
|
||
"R_M32R_HI16_SLO", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Lower 16 bits of address. */
|
||
HOWTO (R_M32R_LO16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
m32r_elf_lo16_reloc, /* special_function */
|
||
"R_M32R_LO16", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Small data area 16 bits offset. */
|
||
HOWTO (R_M32R_SDA16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
m32r_elf_sda16_reloc, /* special_function */
|
||
"R_M32R_SDA16", /* name */
|
||
true, /* partial_inplace */ /* FIXME: correct? */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy */
|
||
HOWTO (R_M32R_GNU_VTINHERIT, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
NULL, /* special_function */
|
||
"R_M32R_GNU_VTINHERIT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable member usage */
|
||
HOWTO (R_M32R_GNU_VTENTRY, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
||
"R_M32R_GNU_VTENTRY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
};
|
||
|
||
/* Handle the R_M32R_10_PCREL reloc. */
|
||
|
||
static bfd_reloc_status_type
|
||
m32r_elf_10_pcrel_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd * abfd;
|
||
arelent * reloc_entry;
|
||
asymbol * symbol;
|
||
PTR data;
|
||
asection * input_section;
|
||
bfd * output_bfd;
|
||
char ** error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
/* This part is from bfd_elf_generic_reloc. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! reloc_entry->howto->partial_inplace
|
||
|| reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != NULL)
|
||
{
|
||
/* FIXME: See bfd_perform_relocation. Is this right? */
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto,
|
||
input_section,
|
||
data, reloc_entry->address,
|
||
symbol->section,
|
||
(symbol->value
|
||
+ symbol->section->output_section->vma
|
||
+ symbol->section->output_offset),
|
||
reloc_entry->addend);
|
||
}
|
||
|
||
/* Utility to actually perform an R_M32R_10_PCREL reloc. */
|
||
|
||
static bfd_reloc_status_type
|
||
m32r_elf_do_10_pcrel_reloc (abfd, howto, input_section, data, offset,
|
||
symbol_section, symbol_value, addend)
|
||
bfd *abfd;
|
||
reloc_howto_type *howto;
|
||
asection *input_section;
|
||
bfd_byte *data;
|
||
bfd_vma offset;
|
||
asection *symbol_section ATTRIBUTE_UNUSED;
|
||
bfd_vma symbol_value;
|
||
bfd_vma addend;
|
||
{
|
||
bfd_signed_vma relocation;
|
||
unsigned long x;
|
||
bfd_reloc_status_type status;
|
||
|
||
/* Sanity check the address (offset in section). */
|
||
if (offset > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
relocation = symbol_value + addend;
|
||
/* Make it pc relative. */
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
/* These jumps mask off the lower two bits of the current address
|
||
before doing pcrel calculations. */
|
||
relocation -= (offset & -(bfd_vma) 4);
|
||
|
||
if (relocation < -0x200 || relocation > 0x1ff)
|
||
status = bfd_reloc_overflow;
|
||
else
|
||
status = bfd_reloc_ok;
|
||
|
||
x = bfd_get_16 (abfd, data + offset);
|
||
relocation >>= howto->rightshift;
|
||
relocation <<= howto->bitpos;
|
||
x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask);
|
||
bfd_put_16 (abfd, (bfd_vma) x, data + offset);
|
||
|
||
return status;
|
||
}
|
||
|
||
/* Handle the R_M32R_HI16_[SU]LO relocs.
|
||
HI16_SLO is for the add3 and load/store with displacement instructions.
|
||
HI16_ULO is for the or3 instruction.
|
||
For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to
|
||
the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then
|
||
we must add one to the high 16 bytes (which will get subtracted off when
|
||
the low 16 bits are added).
|
||
These relocs have to be done in combination with an R_M32R_LO16 reloc
|
||
because there is a carry from the LO16 to the HI16. Here we just save
|
||
the information we need; we do the actual relocation when we see the LO16.
|
||
This code is copied from the elf32-mips.c. We also support an arbitrary
|
||
number of HI16 relocs to be associated with a single LO16 reloc. The
|
||
assembler sorts the relocs to ensure each HI16 immediately precedes its
|
||
LO16. However if there are multiple copies, the assembler may not find
|
||
the real LO16 so it picks the first one it finds. */
|
||
|
||
struct m32r_hi16
|
||
{
|
||
struct m32r_hi16 *next;
|
||
bfd_byte *addr;
|
||
bfd_vma addend;
|
||
};
|
||
|
||
/* FIXME: This should not be a static variable. */
|
||
|
||
static struct m32r_hi16 *m32r_hi16_list;
|
||
|
||
static bfd_reloc_status_type
|
||
m32r_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
struct m32r_hi16 *n;
|
||
|
||
/* This part is from bfd_elf_generic_reloc.
|
||
If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Sanity check the address (offset in section). */
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
ret = bfd_reloc_ok;
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& output_bfd == (bfd *) NULL)
|
||
ret = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
|
||
/* Save the information, and let LO16 do the actual relocation. */
|
||
n = (struct m32r_hi16 *) bfd_malloc ((bfd_size_type) sizeof *n);
|
||
if (n == NULL)
|
||
return bfd_reloc_outofrange;
|
||
n->addr = (bfd_byte *) data + reloc_entry->address;
|
||
n->addend = relocation;
|
||
n->next = m32r_hi16_list;
|
||
m32r_hi16_list = n;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Handle an M32R ELF HI16 reloc. */
|
||
|
||
static void
|
||
m32r_elf_relocate_hi16 (input_bfd, type, relhi, rello, contents, addend)
|
||
bfd *input_bfd;
|
||
int type;
|
||
Elf_Internal_Rela *relhi;
|
||
Elf_Internal_Rela *rello;
|
||
bfd_byte *contents;
|
||
bfd_vma addend;
|
||
{
|
||
unsigned long insn;
|
||
bfd_vma addlo;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
||
|
||
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
|
||
if (type == R_M32R_HI16_SLO)
|
||
addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000;
|
||
else
|
||
addlo &= 0xffff;
|
||
|
||
addend += ((insn & 0xffff) << 16) + addlo;
|
||
|
||
/* Reaccount for sign extension of low part. */
|
||
if (type == R_M32R_HI16_SLO
|
||
&& (addend & 0x8000) != 0)
|
||
addend += 0x10000;
|
||
|
||
bfd_put_32 (input_bfd,
|
||
(insn & 0xffff0000) | ((addend >> 16) & 0xffff),
|
||
contents + relhi->r_offset);
|
||
}
|
||
|
||
/* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit
|
||
inplace relocation; this function exists in order to do the
|
||
R_M32R_HI16_[SU]LO relocation described above. */
|
||
|
||
bfd_reloc_status_type
|
||
m32r_elf_lo16_reloc (input_bfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *input_bfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* This part is from bfd_elf_generic_reloc.
|
||
If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (m32r_hi16_list != NULL)
|
||
{
|
||
struct m32r_hi16 *l;
|
||
|
||
l = m32r_hi16_list;
|
||
while (l != NULL)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
struct m32r_hi16 *next;
|
||
|
||
/* Do the HI16 relocation. Note that we actually don't need
|
||
to know anything about the LO16 itself, except where to
|
||
find the low 16 bits of the addend needed by the LO16. */
|
||
insn = bfd_get_32 (input_bfd, l->addr);
|
||
vallo = ((bfd_get_32 (input_bfd, (bfd_byte *) data + reloc_entry->address)
|
||
& 0xffff) ^ 0x8000) - 0x8000;
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += l->addend;
|
||
|
||
/* Reaccount for sign extension of low part. */
|
||
if ((val & 0x8000) != 0)
|
||
val += 0x10000;
|
||
|
||
insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn, l->addr);
|
||
|
||
next = l->next;
|
||
free (l);
|
||
l = next;
|
||
}
|
||
|
||
m32r_hi16_list = NULL;
|
||
}
|
||
|
||
/* Now do the LO16 reloc in the usual way.
|
||
??? It would be nice to call bfd_elf_generic_reloc here,
|
||
but we have partial_inplace == TRUE. bfd_elf_generic_reloc will
|
||
pass the handling back to bfd_install_relocation which will install
|
||
a section relative addend which is wrong. */
|
||
return m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
}
|
||
|
||
/* Do generic partial_inplace relocation.
|
||
This is a local replacement for bfd_elf_generic_reloc. */
|
||
|
||
bfd_reloc_status_type
|
||
m32r_elf_generic_reloc (input_bfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message)
|
||
bfd *input_bfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
bfd_byte *inplace_address;
|
||
|
||
/* This part is from bfd_elf_generic_reloc.
|
||
If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Now do the reloc in the usual way.
|
||
??? It would be nice to call bfd_elf_generic_reloc here,
|
||
but we have partial_inplace == TRUE. bfd_elf_generic_reloc will
|
||
pass the handling back to bfd_install_relocation which will install
|
||
a section relative addend which is wrong. */
|
||
|
||
/* Sanity check the address (offset in section). */
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
ret = bfd_reloc_ok;
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& output_bfd == (bfd *) NULL)
|
||
ret = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section)
|
||
|| output_bfd != (bfd *) NULL)
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
/* Only do this for a final link. */
|
||
if (output_bfd == (bfd *) NULL)
|
||
{
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
}
|
||
|
||
relocation += reloc_entry->addend;
|
||
inplace_address = (bfd_byte *) data + reloc_entry->address;
|
||
|
||
#define DOIT(x) \
|
||
x = ( (x & ~reloc_entry->howto->dst_mask) | \
|
||
(((x & reloc_entry->howto->src_mask) + relocation) & \
|
||
reloc_entry->howto->dst_mask))
|
||
|
||
switch (reloc_entry->howto->size)
|
||
{
|
||
case 1:
|
||
{
|
||
short x = bfd_get_16 (input_bfd, inplace_address);
|
||
DOIT (x);
|
||
bfd_put_16 (input_bfd, (bfd_vma) x, inplace_address);
|
||
}
|
||
break;
|
||
case 2:
|
||
{
|
||
unsigned long x = bfd_get_32 (input_bfd, inplace_address);
|
||
DOIT (x);
|
||
bfd_put_32 (input_bfd, (bfd_vma)x , inplace_address);
|
||
}
|
||
break;
|
||
default:
|
||
BFD_ASSERT (0);
|
||
}
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Handle the R_M32R_SDA16 reloc.
|
||
This reloc is used to compute the address of objects in the small data area
|
||
and to perform loads and stores from that area.
|
||
The lower 16 bits are sign extended and added to the register specified
|
||
in the instruction, which is assumed to point to _SDA_BASE_. */
|
||
|
||
static bfd_reloc_status_type
|
||
m32r_elf_sda16_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;
|
||
{
|
||
/* This part is from bfd_elf_generic_reloc. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! reloc_entry->howto->partial_inplace
|
||
|| reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != NULL)
|
||
{
|
||
/* FIXME: See bfd_perform_relocation. Is this right? */
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* FIXME: not sure what to do here yet. But then again, the linker
|
||
may never call us. */
|
||
abort ();
|
||
}
|
||
|
||
/* Map BFD reloc types to M32R ELF reloc types. */
|
||
|
||
struct m32r_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned char elf_reloc_val;
|
||
};
|
||
|
||
static const struct m32r_reloc_map m32r_reloc_map[] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_M32R_NONE },
|
||
{ BFD_RELOC_16, R_M32R_16 },
|
||
{ BFD_RELOC_32, R_M32R_32 },
|
||
{ BFD_RELOC_M32R_24, R_M32R_24 },
|
||
{ BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL },
|
||
{ BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL },
|
||
{ BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL },
|
||
{ BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO },
|
||
{ BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO },
|
||
{ BFD_RELOC_M32R_LO16, R_M32R_LO16 },
|
||
{ BFD_RELOC_M32R_SDA16, R_M32R_SDA16 },
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY },
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map);
|
||
i++)
|
||
{
|
||
if (m32r_reloc_map[i].bfd_reloc_val == code)
|
||
return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val];
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for an M32R ELF reloc. */
|
||
|
||
static void
|
||
m32r_info_to_howto_rel (abfd, cache_ptr, dst)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
arelent *cache_ptr;
|
||
Elf32_Internal_Rel *dst;
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
BFD_ASSERT (r_type < (unsigned int) R_M32R_max);
|
||
cache_ptr->howto = &m32r_elf_howto_table[r_type];
|
||
}
|
||
|
||
/* Given a BFD section, try to locate the corresponding ELF section
|
||
index. */
|
||
|
||
boolean
|
||
_bfd_m32r_elf_section_from_bfd_section (abfd, sec, retval)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
asection *sec;
|
||
int *retval;
|
||
{
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
|
||
{
|
||
*retval = SHN_M32R_SCOMMON;
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* M32R ELF uses two common sections. One is the usual one, and the other
|
||
is for small objects. All the small objects are kept together, and then
|
||
referenced via one register, which yields faster assembler code. It is
|
||
up to the compiler to emit an instruction to load the register with
|
||
_SDA_BASE. This is what we use for the small common section. This
|
||
approach is copied from elf32-mips.c. */
|
||
static asection m32r_elf_scom_section;
|
||
static asymbol m32r_elf_scom_symbol;
|
||
static asymbol *m32r_elf_scom_symbol_ptr;
|
||
|
||
/* Handle the special M32R section numbers that a symbol may use. */
|
||
|
||
void
|
||
_bfd_m32r_elf_symbol_processing (abfd, asym)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
asymbol *asym;
|
||
{
|
||
elf_symbol_type *elfsym;
|
||
|
||
elfsym = (elf_symbol_type *) asym;
|
||
|
||
switch (elfsym->internal_elf_sym.st_shndx)
|
||
{
|
||
case SHN_M32R_SCOMMON:
|
||
if (m32r_elf_scom_section.name == NULL)
|
||
{
|
||
/* Initialize the small common section. */
|
||
m32r_elf_scom_section.name = ".scommon";
|
||
m32r_elf_scom_section.flags = SEC_IS_COMMON;
|
||
m32r_elf_scom_section.output_section = &m32r_elf_scom_section;
|
||
m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol;
|
||
m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr;
|
||
m32r_elf_scom_symbol.name = ".scommon";
|
||
m32r_elf_scom_symbol.flags = BSF_SECTION_SYM;
|
||
m32r_elf_scom_symbol.section = &m32r_elf_scom_section;
|
||
m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol;
|
||
}
|
||
asym->section = &m32r_elf_scom_section;
|
||
asym->value = elfsym->internal_elf_sym.st_size;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We must handle the special M32R section numbers here.
|
||
We also keep watching for whether we need to create the sdata special
|
||
linker sections. */
|
||
|
||
static boolean
|
||
m32r_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
const Elf_Internal_Sym *sym;
|
||
const char **namep;
|
||
flagword *flagsp ATTRIBUTE_UNUSED;
|
||
asection **secp;
|
||
bfd_vma *valp;
|
||
{
|
||
if (! info->relocateable
|
||
&& (*namep)[0] == '_' && (*namep)[1] == 'S'
|
||
&& strcmp (*namep, "_SDA_BASE_") == 0
|
||
&& info->hash->creator->flavour == bfd_target_elf_flavour)
|
||
{
|
||
/* This is simpler than using _bfd_elf_create_linker_section
|
||
(our needs are simpler than ppc's needs). Also
|
||
_bfd_elf_create_linker_section currently has a bug where if a .sdata
|
||
section already exists a new one is created that follows it which
|
||
screws of _SDA_BASE_ address calcs because output_offset != 0. */
|
||
struct elf_link_hash_entry *h;
|
||
asection *s = bfd_get_section_by_name (abfd, ".sdata");
|
||
|
||
/* The following code was cobbled from elf32-ppc.c and elflink.c. */
|
||
|
||
if (s == NULL)
|
||
{
|
||
flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
|
||
s = bfd_make_section_anyway (abfd, ".sdata");
|
||
if (s == NULL)
|
||
return false;
|
||
bfd_set_section_flags (abfd, s, flags);
|
||
bfd_set_section_alignment (abfd, s, 2);
|
||
}
|
||
|
||
h = (struct elf_link_hash_entry *)
|
||
bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, false);
|
||
|
||
if ((h == NULL || h->root.type == bfd_link_hash_undefined)
|
||
&& !(_bfd_generic_link_add_one_symbol (info,
|
||
abfd,
|
||
"_SDA_BASE_",
|
||
BSF_GLOBAL,
|
||
s,
|
||
(bfd_vma) 32768,
|
||
(const char *) NULL,
|
||
false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->type = STT_OBJECT;
|
||
}
|
||
|
||
switch (sym->st_shndx)
|
||
{
|
||
case SHN_M32R_SCOMMON:
|
||
*secp = bfd_make_section_old_way (abfd, ".scommon");
|
||
(*secp)->flags |= SEC_IS_COMMON;
|
||
*valp = sym->st_size;
|
||
break;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* We have to figure out the SDA_BASE value, so that we can adjust the
|
||
symbol value correctly. We look up the symbol _SDA_BASE_ in the output
|
||
BFD. If we can't find it, we're stuck. We cache it in the ELF
|
||
target data. We don't need to adjust the symbol value for an
|
||
external symbol if we are producing relocateable output. */
|
||
|
||
static bfd_reloc_status_type
|
||
m32r_elf_final_sda_base (output_bfd, info, error_message, psb)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
const char **error_message;
|
||
bfd_vma *psb;
|
||
{
|
||
if (elf_gp (output_bfd) == 0)
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_defined)
|
||
elf_gp (output_bfd) = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
else
|
||
{
|
||
/* Only get the error once. */
|
||
*psb = elf_gp (output_bfd) = 4;
|
||
*error_message =
|
||
(const char *) _("SDA relocation when _SDA_BASE_ not defined");
|
||
return bfd_reloc_dangerous;
|
||
}
|
||
}
|
||
*psb = elf_gp (output_bfd);
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Relocate an M32R/D ELF section.
|
||
There is some attempt to make this function usable for many architectures,
|
||
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
||
if only to serve as a learning tool.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjust the section contents as
|
||
necessary, and (if using Rela relocs and generating a
|
||
relocateable output file) adjusting the reloc addend as
|
||
necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocateable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static boolean
|
||
m32r_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 = &elf_tdata (input_bfd)->symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
||
Elf_Internal_Rela *rel, *relend;
|
||
/* Assume success. */
|
||
boolean ret = true;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
/* We can't modify r_addend here as elf_link_input_bfd has an assert to
|
||
ensure it's zero (we use REL relocs, not RELA). Therefore this
|
||
should be assigning zero to `addend', but for clarity we use
|
||
`r_addend'. */
|
||
bfd_vma addend = rel->r_addend;
|
||
bfd_vma offset = rel->r_offset;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
const char *sym_name;
|
||
bfd_reloc_status_type r;
|
||
const char *errmsg = NULL;
|
||
|
||
h = NULL;
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= (int) R_M32R_max)
|
||
{
|
||
(*_bfd_error_handler) (_("%s: unknown relocation type %d"),
|
||
bfd_archive_filename (input_bfd),
|
||
(int) r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
if (r_type == R_M32R_GNU_VTENTRY
|
||
|| r_type == R_M32R_GNU_VTINHERIT)
|
||
continue;
|
||
|
||
howto = m32r_elf_howto_table + r_type;
|
||
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. */
|
||
sec = NULL;
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
/* External symbol. */
|
||
continue;
|
||
}
|
||
|
||
/* Local symbol. */
|
||
sym = local_syms + r_symndx;
|
||
sym_name = "<local symbol>";
|
||
/* STT_SECTION: symbol is associated with a section. */
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
{
|
||
/* Symbol isn't associated with a section. Nothing to do. */
|
||
continue;
|
||
}
|
||
|
||
sec = local_sections[r_symndx];
|
||
addend += sec->output_offset + sym->st_value;
|
||
#ifndef USE_REL
|
||
/* This can't be done for USE_REL because it doesn't mean anything
|
||
and elf_link_input_bfd asserts this stays zero. */
|
||
rel->r_addend = addend;
|
||
#endif
|
||
|
||
#ifndef USE_REL
|
||
/* Addends are stored with relocs. We're done. */
|
||
continue;
|
||
#else /* USE_REL */
|
||
/* If partial_inplace, we need to store any additional addend
|
||
back in the section. */
|
||
if (! howto->partial_inplace)
|
||
continue;
|
||
/* ??? Here is a nice place to call a special_function
|
||
like handler. */
|
||
if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO)
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
addend, contents + offset);
|
||
else
|
||
{
|
||
Elf_Internal_Rela *lorel;
|
||
|
||
/* We allow an arbitrary number of HI16 relocs before the
|
||
LO16 reloc. This permits gcc to emit the HI and LO relocs
|
||
itself. */
|
||
for (lorel = rel + 1;
|
||
(lorel < relend
|
||
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|
||
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
|
||
lorel++)
|
||
continue;
|
||
if (lorel < relend
|
||
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
|
||
{
|
||
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
|
||
contents, addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
addend, contents + offset);
|
||
}
|
||
#endif /* USE_REL */
|
||
}
|
||
else
|
||
{
|
||
bfd_vma relocation;
|
||
|
||
/* This is a final link. */
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* Local symbol. */
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
sym_name = "<local symbol>";
|
||
#ifndef USE_REL
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
|
||
addend = rel->r_addend;
|
||
#else
|
||
/* FIXME: This won't handle local relocations against SEC_MERGE
|
||
symbols. See elf32-i386.c for how to do this. */
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
/* External symbol. */
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
sym_name = h->root.root.string;
|
||
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
if (sec->output_section == NULL)
|
||
relocation = 0;
|
||
else
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, offset, true)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
/* Sanity check the address. */
|
||
if (offset > input_section->_raw_size)
|
||
{
|
||
r = bfd_reloc_outofrange;
|
||
goto check_reloc;
|
||
}
|
||
|
||
switch ((int) r_type)
|
||
{
|
||
case (int) R_M32R_10_PCREL :
|
||
r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section,
|
||
contents, offset,
|
||
sec, relocation, addend);
|
||
break;
|
||
|
||
case (int) R_M32R_HI16_SLO :
|
||
case (int) R_M32R_HI16_ULO :
|
||
{
|
||
Elf_Internal_Rela *lorel;
|
||
|
||
/* We allow an arbitrary number of HI16 relocs before the
|
||
LO16 reloc. This permits gcc to emit the HI and LO relocs
|
||
itself. */
|
||
for (lorel = rel + 1;
|
||
(lorel < relend
|
||
&& (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO
|
||
|| ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO));
|
||
lorel++)
|
||
continue;
|
||
if (lorel < relend
|
||
&& ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16)
|
||
{
|
||
m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel,
|
||
contents, relocation + addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, offset,
|
||
relocation, addend);
|
||
}
|
||
break;
|
||
|
||
case (int) R_M32R_SDA16 :
|
||
{
|
||
const char *name;
|
||
|
||
BFD_ASSERT (sec != NULL);
|
||
name = bfd_get_section_name (abfd, sec);
|
||
|
||
if (strcmp (name, ".sdata") == 0
|
||
|| strcmp (name, ".sbss") == 0
|
||
|| strcmp (name, ".scommon") == 0)
|
||
{
|
||
bfd_vma sda_base;
|
||
bfd *out_bfd = sec->output_section->owner;
|
||
|
||
r = m32r_elf_final_sda_base (out_bfd, info,
|
||
&errmsg,
|
||
&sda_base);
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
ret = false;
|
||
goto check_reloc;
|
||
}
|
||
|
||
/* At this point `relocation' contains the object's
|
||
address. */
|
||
relocation -= sda_base;
|
||
/* Now it contains the offset from _SDA_BASE_. */
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"),
|
||
bfd_archive_filename (input_bfd),
|
||
sym_name,
|
||
m32r_elf_howto_table[(int) r_type].name,
|
||
bfd_get_section_name (abfd, sec));
|
||
/*bfd_set_error (bfd_error_bad_value); ??? why? */
|
||
ret = false;
|
||
continue;
|
||
}
|
||
}
|
||
/* fall through */
|
||
|
||
default :
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, offset,
|
||
relocation, addend);
|
||
break;
|
||
}
|
||
}
|
||
|
||
check_reloc:
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
/* FIXME: This should be generic enough to go in a utility. */
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL || *name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
if (errmsg != NULL)
|
||
goto common_error;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, offset)))
|
||
return false;
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, name, input_bfd, input_section,
|
||
offset, true)))
|
||
return false;
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
errmsg = _("internal error: out of range error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_notsupported:
|
||
errmsg = _("internal error: unsupported relocation error");
|
||
goto common_error;
|
||
|
||
case bfd_reloc_dangerous:
|
||
errmsg = _("internal error: dangerous error");
|
||
goto common_error;
|
||
|
||
default:
|
||
errmsg = _("internal error: unknown error");
|
||
/* fall through */
|
||
|
||
common_error:
|
||
if (!((*info->callbacks->warning)
|
||
(info, errmsg, name, input_bfd, input_section,
|
||
offset)))
|
||
return false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
#if 0 /* relaxing not supported yet */
|
||
|
||
/* This function handles relaxing for the m32r.
|
||
Relaxing on the m32r is tricky because of instruction alignment
|
||
requirements (4 byte instructions must be aligned on 4 byte boundaries).
|
||
|
||
The following relaxing opportunities are handled:
|
||
|
||
seth/add3/jl -> bl24 or bl8
|
||
seth/add3 -> ld24
|
||
|
||
It would be nice to handle bl24 -> bl8 but given:
|
||
|
||
- 4 byte insns must be on 4 byte boundaries
|
||
- branch instructions only branch to insns on 4 byte boundaries
|
||
|
||
this isn't much of a win because the insn in the 2 "deleted" bytes
|
||
must become a nop. With some complexity some real relaxation could be
|
||
done but the frequency just wouldn't make it worth it; it's better to
|
||
try to do all the code compaction one can elsewhere.
|
||
When the chip supports parallel 16 bit insns, things may change.
|
||
*/
|
||
|
||
static boolean
|
||
m32r_elf_relax_section (abfd, sec, link_info, again)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
struct bfd_link_info *link_info;
|
||
boolean *again;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
/* The Rela structures are used here because that's what
|
||
_bfd_elf32_link_read_relocs uses [for convenience - it sets the addend
|
||
field to 0]. */
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *free_relocs = NULL;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *contents = NULL;
|
||
bfd_byte *free_contents = NULL;
|
||
Elf32_External_Sym *extsyms = NULL;
|
||
Elf32_External_Sym *free_extsyms = NULL;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = false;
|
||
|
||
/* We don't have to do anything for a relocateable link, if
|
||
this section does not have relocs, or if this is not a
|
||
code section. */
|
||
if (link_info->relocateable
|
||
|| (sec->flags & SEC_RELOC) == 0
|
||
|| sec->reloc_count == 0
|
||
|| (sec->flags & SEC_CODE) == 0
|
||
|| 0 /* FIXME: check SHF_M32R_CAN_RELAX */)
|
||
return true;
|
||
|
||
/* If this is the first time we have been called for this section,
|
||
initialize the cooked size. */
|
||
if (sec->_cooked_size == 0)
|
||
sec->_cooked_size = sec->_raw_size;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
/* Get a copy of the native relocations. */
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
||
link_info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
if (! link_info->keep_memory)
|
||
free_relocs = internal_relocs;
|
||
|
||
/* Walk through them looking for relaxing opportunities. */
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma symval;
|
||
|
||
/* If this isn't something that can be relaxed, then ignore
|
||
this reloc. */
|
||
if (ELF32_R_TYPE (irel->r_info) != (int) R_M32R_HI16_SLO)
|
||
continue;
|
||
|
||
/* Get the section contents if we haven't done so already. */
|
||
if (contents == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* Go get them off disk. */
|
||
contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
|
||
if (contents == NULL)
|
||
goto error_return;
|
||
free_contents = contents;
|
||
|
||
if (! bfd_get_section_contents (abfd, sec, contents,
|
||
(file_ptr) 0, sec->_raw_size))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Read this BFD's symbols if we haven't done so already. */
|
||
if (extsyms == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (symtab_hdr->contents != NULL)
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else
|
||
{
|
||
bfd_size_type amt = symtab_hdr->sh_size;
|
||
/* Go get them off disk. */
|
||
extsyms = (Elf32_External_Sym *) bfd_malloc (amt);
|
||
if (extsyms == NULL)
|
||
goto error_return;
|
||
free_extsyms = extsyms;
|
||
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread (extsyms, amt, abfd) != amt)
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
asection *sym_sec;
|
||
|
||
/* A local symbol. */
|
||
bfd_elf32_swap_symbol_in (abfd,
|
||
extsyms + ELF32_R_SYM (irel->r_info),
|
||
&isym);
|
||
|
||
sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx);
|
||
symval = (isym.st_value
|
||
+ sym_sec->output_section->vma
|
||
+ sym_sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* An external symbol. */
|
||
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
{
|
||
/* This appears to be a reference to an undefined
|
||
symbol. Just ignore it--it will be caught by the
|
||
regular reloc processing. */
|
||
continue;
|
||
}
|
||
|
||
symval = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
|
||
/* For simplicity of coding, we are going to modify the section
|
||
contents, the section relocs, and the BFD symbol table. We
|
||
must tell the rest of the code not to free up this
|
||
information. It would be possible to instead create a table
|
||
of changes which have to be made, as is done in coff-mips.c;
|
||
that would be more work, but would require less memory when
|
||
the linker is run. */
|
||
|
||
/* Try to change a seth/add3/jl subroutine call to bl24 or bl8.
|
||
This sequence is generated by the compiler when compiling in
|
||
32 bit mode. Also look for seth/add3 -> ld24. */
|
||
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_M32R_HI16_SLO)
|
||
{
|
||
Elf_Internal_Rela *nrel;
|
||
bfd_vma pc = (sec->output_section->vma + sec->output_offset
|
||
+ irel->r_offset);
|
||
bfd_signed_vma pcrel_value = symval - pc;
|
||
unsigned int code,reg;
|
||
int addend,nop_p,bl8_p,to_delete;
|
||
|
||
/* The tests are ordered so that we get out as quickly as possible
|
||
if this isn't something we can relax, taking into account that
|
||
we are looking for two separate possibilities (jl/ld24). */
|
||
|
||
/* Do nothing if no room in the section for this to be what we're
|
||
looking for. */
|
||
if (irel->r_offset > sec->_cooked_size - 8)
|
||
continue;
|
||
|
||
/* Make sure the next relocation applies to the next
|
||
instruction and that it's the add3's reloc. */
|
||
nrel = irel + 1;
|
||
if (nrel == irelend
|
||
|| irel->r_offset + 4 != nrel->r_offset
|
||
|| ELF32_R_TYPE (nrel->r_info) != (int) R_M32R_LO16)
|
||
continue;
|
||
|
||
/* See if the instructions are seth/add3. */
|
||
/* FIXME: This is where macros from cgen can come in. */
|
||
code = bfd_get_16 (abfd, contents + irel->r_offset + 0);
|
||
if ((code & 0xf0ff) != 0xd0c0)
|
||
continue; /* not seth rN,foo */
|
||
reg = (code & 0x0f00) >> 8;
|
||
code = bfd_get_16 (abfd, contents + irel->r_offset + 4);
|
||
if (code != (0x80a0 | reg | (reg << 8)))
|
||
continue; /* not add3 rN,rN,foo */
|
||
|
||
/* At this point we've confirmed we have seth/add3. Now check
|
||
whether the next insn is a jl, in which case try to change this
|
||
to bl24 or bl8. */
|
||
|
||
/* Ensure the branch target is in range.
|
||
The bl24 instruction has a 24 bit operand which is the target
|
||
address right shifted by 2, giving a signed range of 26 bits.
|
||
Note that 4 bytes are added to the high value because the target
|
||
will be at least 4 bytes closer if we can relax. It'll actually
|
||
be 4 or 8 bytes closer, but we don't know which just yet and
|
||
the difference isn't significant enough to worry about. */
|
||
#ifndef USE_REL /* put in for learning purposes */
|
||
pcrel_value += irel->r_addend;
|
||
#else
|
||
addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2);
|
||
pcrel_value += addend;
|
||
#endif
|
||
|
||
if (pcrel_value >= -(1 << 25) && pcrel_value < (1 << 25) + 4
|
||
/* Do nothing if no room in the section for this to be what we're
|
||
looking for. */
|
||
&& (irel->r_offset <= sec->_cooked_size - 12)
|
||
/* Ensure the next insn is "jl rN". */
|
||
&& ((code = bfd_get_16 (abfd, contents + irel->r_offset + 8)),
|
||
code != (0x1ec0 | reg)))
|
||
{
|
||
/* We can relax to bl24/bl8. */
|
||
|
||
/* See if there's a nop following the jl.
|
||
Also see if we can use a bl8 insn. */
|
||
code = bfd_get_16 (abfd, contents + irel->r_offset + 10);
|
||
nop_p = (code & 0x7fff) == NOP_INSN;
|
||
bl8_p = pcrel_value >= -0x200 && pcrel_value < 0x200;
|
||
|
||
if (bl8_p)
|
||
{
|
||
/* Change "seth rN,foo" to "bl8 foo || nop".
|
||
We OR in CODE just in case it's not a nop (technically,
|
||
CODE currently must be a nop, but for cleanness we
|
||
allow it to be anything). */
|
||
#ifndef USE_REL /* put in for learning purposes */
|
||
code = 0x7e000000 | MAKE_PARALLEL (code);
|
||
#else
|
||
code = (0x7e000000 + (((addend >> 2) & 0xff) << 16)) | MAKE_PARALLEL (code);
|
||
#endif
|
||
to_delete = 8;
|
||
}
|
||
else
|
||
{
|
||
/* Change the seth rN,foo to a bl24 foo. */
|
||
#ifndef USE_REL /* put in for learning purposes */
|
||
code = 0xfe000000;
|
||
#else
|
||
code = 0xfe000000 + ((addend >> 2) & 0xffffff);
|
||
#endif
|
||
to_delete = nop_p ? 8 : 4;
|
||
}
|
||
|
||
bfd_put_32 (abfd, code, contents + irel->r_offset);
|
||
|
||
/* Set the new reloc type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
||
bl8_p ? R_M32R_10_PCREL : R_M32R_26_PCREL);
|
||
|
||
/* Delete the add3 reloc by making it a null reloc. */
|
||
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
||
R_M32R_NONE);
|
||
}
|
||
else if (addend >= 0
|
||
&& symval + addend <= 0xffffff)
|
||
{
|
||
/* We can relax to ld24. */
|
||
|
||
code = 0xe0000000 | (reg << 24) | (addend & 0xffffff);
|
||
bfd_put_32 (abfd, code, contents + irel->r_offset);
|
||
to_delete = 4;
|
||
/* Tell the following code a nop filler isn't needed. */
|
||
nop_p = 1;
|
||
}
|
||
else
|
||
{
|
||
/* Can't do anything here. */
|
||
continue;
|
||
}
|
||
|
||
/* Note that we've changed the relocs, section contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
free_relocs = NULL;
|
||
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
free_contents = NULL;
|
||
|
||
symtab_hdr->contents = (bfd_byte *) extsyms;
|
||
free_extsyms = NULL;
|
||
|
||
/* Delete TO_DELETE bytes of data. */
|
||
if (!m32r_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 4, to_delete))
|
||
goto error_return;
|
||
|
||
/* Now that the following bytes have been moved into place, see if
|
||
we need to replace the jl with a nop. This happens when we had
|
||
to use a bl24 insn and the insn following the jl isn't a nop.
|
||
Technically, this situation can't happen (since the insn can
|
||
never be executed) but to be clean we do this. When the chip
|
||
supports parallel 16 bit insns things may change.
|
||
We don't need to do this in the case of relaxing to ld24,
|
||
and the above code sets nop_p so this isn't done. */
|
||
if (! nop_p && to_delete == 4)
|
||
bfd_put_16 (abfd, NOP_INSN, contents + irel->r_offset + 4);
|
||
|
||
/* That will change things, so we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = true;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* loop to try the next reloc */
|
||
}
|
||
|
||
if (free_relocs != NULL)
|
||
{
|
||
free (free_relocs);
|
||
free_relocs = NULL;
|
||
}
|
||
|
||
if (free_contents != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_contents);
|
||
else
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
}
|
||
free_contents = NULL;
|
||
}
|
||
|
||
if (free_extsyms != NULL)
|
||
{
|
||
if (! link_info->keep_memory)
|
||
free (free_extsyms);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = extsyms;
|
||
}
|
||
free_extsyms = NULL;
|
||
}
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (free_relocs != NULL)
|
||
free (free_relocs);
|
||
if (free_contents != NULL)
|
||
free (free_contents);
|
||
if (free_extsyms != NULL)
|
||
free (free_extsyms);
|
||
return false;
|
||
}
|
||
|
||
/* Delete some bytes from a section while relaxing. */
|
||
|
||
static boolean
|
||
m32r_elf_relax_delete_bytes (abfd, sec, addr, count)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
bfd_vma addr;
|
||
int count;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf32_External_Sym *extsyms;
|
||
int shndx, index;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
Elf_Internal_Rela *irelalign;
|
||
bfd_vma toaddr;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
struct elf_link_hash_entry *sym_hash;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
|
||
shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
|
||
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
|
||
/* The deletion must stop at the next ALIGN reloc for an aligment
|
||
power larger than the number of bytes we are deleting. */
|
||
|
||
irelalign = NULL;
|
||
toaddr = sec->_cooked_size;
|
||
|
||
irel = elf_section_data (sec)->relocs;
|
||
irelend = irel + sec->reloc_count;
|
||
|
||
/* Actually delete the bytes. */
|
||
memmove (contents + addr, contents + addr + count, toaddr - addr - count);
|
||
sec->_cooked_size -= count;
|
||
|
||
/* Adjust all the relocs. */
|
||
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
||
{
|
||
/* Get the new reloc address. */
|
||
if ((irel->r_offset > addr
|
||
&& irel->r_offset < toaddr))
|
||
irel->r_offset -= count;
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
esym = extsyms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; esym++)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
||
|
||
if (isym.st_shndx == shndx
|
||
&& isym.st_value > addr
|
||
&& isym.st_value < toaddr)
|
||
{
|
||
isym.st_value -= count;
|
||
bfd_elf32_swap_symbol_out (abfd, &isym, esym);
|
||
}
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
esym = extsyms + symtab_hdr->sh_info;
|
||
esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
|
||
for (index = 0; esym < esymend; esym++, index++)
|
||
{
|
||
Elf_Internal_Sym isym;
|
||
|
||
bfd_elf32_swap_symbol_in (abfd, esym, &isym);
|
||
sym_hash = elf_sym_hashes (abfd)[index];
|
||
if (isym.st_shndx == shndx
|
||
&& ((sym_hash)->root.type == bfd_link_hash_defined
|
||
|| (sym_hash)->root.type == bfd_link_hash_defweak)
|
||
&& (sym_hash)->root.u.def.section == sec
|
||
&& (sym_hash)->root.u.def.value > addr
|
||
&& (sym_hash)->root.u.def.value < toaddr)
|
||
{
|
||
(sym_hash)->root.u.def.value -= count;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is a version of bfd_generic_get_relocated_section_contents
|
||
which uses m32r_elf_relocate_section. */
|
||
|
||
static bfd_byte *
|
||
m32r_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
|
||
data, relocateable, symbols)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
bfd *input_bfd = input_section->owner;
|
||
asection **sections = NULL;
|
||
Elf_Internal_Rela *internal_relocs = NULL;
|
||
Elf32_External_Sym *external_syms = NULL;
|
||
Elf_Internal_Sym *internal_syms = NULL;
|
||
bfd_size_type amt;
|
||
|
||
/* We only need to handle the case of relaxing, or of having a
|
||
particular set of section contents, specially. */
|
||
if (relocateable
|
||
|| elf_section_data (input_section)->this_hdr.contents == NULL)
|
||
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
||
link_order, data,
|
||
relocateable,
|
||
symbols);
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
|
||
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
|
||
input_section->_raw_size);
|
||
|
||
if ((input_section->flags & SEC_RELOC) != 0
|
||
&& input_section->reloc_count > 0)
|
||
{
|
||
Elf_Internal_Sym *isymp;
|
||
asection **secpp;
|
||
Elf32_External_Sym *esym, *esymend;
|
||
|
||
if (symtab_hdr->contents != NULL)
|
||
external_syms = (Elf32_External_Sym *) symtab_hdr->contents;
|
||
else
|
||
{
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf32_External_Sym);
|
||
external_syms = (Elf32_External_Sym *) bfd_malloc (amt);
|
||
if (external_syms == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|
||
|| bfd_bread (external_syms, amt, input_bfd) != amt)
|
||
goto error_return;
|
||
}
|
||
|
||
internal_relocs = (_bfd_elf32_link_read_relocs
|
||
(input_bfd, input_section, (PTR) NULL,
|
||
(Elf_Internal_Rela *) NULL, false));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (Elf_Internal_Sym);
|
||
internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt);
|
||
if (internal_syms == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
|
||
amt = symtab_hdr->sh_info;
|
||
amt *= sizeof (asection *);
|
||
sections = (asection **) bfd_malloc (amt);
|
||
if (sections == NULL && symtab_hdr->sh_info > 0)
|
||
goto error_return;
|
||
|
||
isymp = internal_syms;
|
||
secpp = sections;
|
||
esym = external_syms;
|
||
esymend = esym + symtab_hdr->sh_info;
|
||
for (; esym < esymend; ++esym, ++isymp, ++secpp)
|
||
{
|
||
asection *isec;
|
||
|
||
bfd_elf32_swap_symbol_in (input_bfd, esym, isymp);
|
||
|
||
if (isymp->st_shndx == SHN_UNDEF)
|
||
isec = bfd_und_section_ptr;
|
||
else if (isymp->st_shndx == SHN_ABS)
|
||
isec = bfd_abs_section_ptr;
|
||
else if (isymp->st_shndx == SHN_COMMON)
|
||
isec = bfd_com_section_ptr;
|
||
else if (isymp->st_shndx == SHN_M32R_SCOMMON)
|
||
isec = &m32r_elf_scom_section;
|
||
else
|
||
isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx);
|
||
|
||
*secpp = isec;
|
||
}
|
||
|
||
if (! m32r_elf_relocate_section (output_bfd, link_info, input_bfd,
|
||
input_section, data, internal_relocs,
|
||
internal_syms, sections))
|
||
goto error_return;
|
||
|
||
if (sections != NULL)
|
||
free (sections);
|
||
sections = NULL;
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
internal_syms = NULL;
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
external_syms = NULL;
|
||
if (internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
internal_relocs = NULL;
|
||
}
|
||
|
||
return data;
|
||
|
||
error_return:
|
||
if (internal_relocs != NULL
|
||
&& internal_relocs != elf_section_data (input_section)->relocs)
|
||
free (internal_relocs);
|
||
if (external_syms != NULL && symtab_hdr->contents == NULL)
|
||
free (external_syms);
|
||
if (internal_syms != NULL)
|
||
free (internal_syms);
|
||
if (sections != NULL)
|
||
free (sections);
|
||
return NULL;
|
||
}
|
||
|
||
#endif /* #if 0 */
|
||
|
||
/* Set the right machine number. */
|
||
static boolean
|
||
m32r_elf_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
|
||
{
|
||
default:
|
||
case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break;
|
||
case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Store the machine number in the flags field. */
|
||
static void
|
||
m32r_elf_final_write_processing (abfd, linker)
|
||
bfd * abfd;
|
||
boolean linker ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned long val;
|
||
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
default:
|
||
case bfd_mach_m32r: val = E_M32R_ARCH; break;
|
||
case bfd_mach_m32rx: val = E_M32RX_ARCH; break;
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH;
|
||
elf_elfheader (abfd)->e_flags |= val;
|
||
}
|
||
|
||
/* Function to keep M32R specific file flags. */
|
||
static boolean
|
||
m32r_elf_set_private_flags (abfd, flags)
|
||
bfd * abfd;
|
||
flagword flags;
|
||
{
|
||
BFD_ASSERT (!elf_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
static boolean
|
||
m32r_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd * ibfd;
|
||
bfd * obfd;
|
||
{
|
||
flagword out_flags;
|
||
flagword in_flags;
|
||
|
||
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
in_flags = elf_elfheader (ibfd)->e_flags;
|
||
out_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (! elf_flags_init (obfd))
|
||
{
|
||
/* If the input is the default architecture then do not
|
||
bother setting the flags for the output architecture,
|
||
instead allow future merges to do this. If no future
|
||
merges ever set these flags then they will retain their
|
||
unitialised values, which surprise surprise, correspond
|
||
to the default values. */
|
||
if (bfd_get_arch_info (ibfd)->the_default)
|
||
return true;
|
||
|
||
elf_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = in_flags;
|
||
|
||
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
||
&& bfd_get_arch_info (obfd)->the_default)
|
||
{
|
||
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Check flag compatibility. */
|
||
if (in_flags == out_flags)
|
||
return true;
|
||
|
||
if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH))
|
||
{
|
||
if ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: Instruction set mismatch with previous modules"),
|
||
bfd_archive_filename (ibfd));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Display the flags field */
|
||
static boolean
|
||
m32r_elf_print_private_bfd_data (abfd, ptr)
|
||
bfd * abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE * file = (FILE *) ptr;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL)
|
||
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags);
|
||
|
||
switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH)
|
||
{
|
||
default:
|
||
case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break;
|
||
case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break;
|
||
}
|
||
|
||
fputc ('\n', file);
|
||
|
||
return true;
|
||
}
|
||
|
||
asection *
|
||
m32r_elf_gc_mark_hook (abfd, info, rel, h, sym)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *rel;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_M32R_GNU_VTINHERIT:
|
||
case R_M32R_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static boolean
|
||
m32r_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;
|
||
{
|
||
/* we don't use got and plt entries for m32r */
|
||
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
|
||
m32r_elf_check_relocs (abfd, info, sec, relocs)
|
||
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, **sym_hashes_end;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
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;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
unsigned long r_symndx;
|
||
|
||
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))
|
||
{
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_M32R_GNU_VTINHERIT:
|
||
if (!_bfd_elf32_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_M32R_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
||
return false;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define ELF_ARCH bfd_arch_m32r
|
||
#define ELF_MACHINE_CODE EM_M32R
|
||
#define ELF_MACHINE_ALT1 EM_CYGNUS_M32R
|
||
#define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_m32r_vec
|
||
#define TARGET_BIG_NAME "elf32-m32r"
|
||
|
||
#define elf_info_to_howto 0
|
||
#define elf_info_to_howto_rel m32r_info_to_howto_rel
|
||
#define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section
|
||
#define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing
|
||
#define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook
|
||
#define elf_backend_relocate_section m32r_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs m32r_elf_check_relocs
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#if 0 /* not yet */
|
||
/* relax support */
|
||
#define bfd_elf32_bfd_relax_section m32r_elf_relax_section
|
||
#define bfd_elf32_bfd_get_relocated_section_contents \
|
||
m32r_elf_get_relocated_section_contents
|
||
#endif
|
||
|
||
#define elf_backend_object_p m32r_elf_object_p
|
||
#define elf_backend_final_write_processing m32r_elf_final_write_processing
|
||
#define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags
|
||
#define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data
|
||
|
||
#include "elf32-target.h"
|