mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
a75473eb66
(ALL_MACHINES_CFILES): Add cpu-iq2000.c. (BFD32_BACKENDS): Add elf32-iq2000.lo. (BFD32_BACKENDS_CFILES): Add elf32-iq2000.c. (cpu-iq2000.lo): New target. * Makefile.in: Regenerate. * config.bfd: Handle iq2000-*-elf. * archures.c (bfd_architecture): Add bfd_{arch,mach}_iq2000. (bfd_archures_list): Add bfd_iq2000_arch. * configure.in: Handle bfd_elf32_iq2000_vec. * configure: Regenerate. * reloc.c: Add BFD_RELOC_IQ2000_OFFSET_16, BFD_RELOC_IQ2000_OFFSET_21, and BFD_RELOC_IQ2000_UHI16. * targets.c (bfd_elf32_iq2000_vec): Declare. (bfd_target_vector): Add bfd_elf32_iq2000_vec. * elf.c (prep_headers): Set e_machine to EM_IQ2000. * cpu-iq2000.c: New file. * elf32-iq2000.c: Likewise. * libbfd.h: Regenerate. * bfd-in2.h: Likewise.
975 lines
29 KiB
C
975 lines
29 KiB
C
/* IQ2000-specific support for 32-bit ELF.
|
||
Copyright (C) 2003 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/iq2000.h"
|
||
|
||
/* Forward declarations. */
|
||
|
||
/* Private relocation functions. */
|
||
static bfd_reloc_status_type iq2000_elf_relocate_hi16 PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
|
||
static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
|
||
static void iq2000_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
|
||
static bfd_boolean iq2000_elf_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
|
||
static bfd_reloc_status_type iq2000_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma));
|
||
static bfd_boolean iq2000_elf_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
|
||
static asection * iq2000_elf_gc_mark_hook PARAMS ((asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *));
|
||
static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
|
||
static int elf32_iq2000_machine PARAMS ((bfd *));
|
||
static bfd_boolean iq2000_elf_object_p PARAMS ((bfd *));
|
||
static bfd_boolean iq2000_elf_set_private_flags PARAMS ((bfd *, flagword));
|
||
static bfd_boolean iq2000_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
|
||
static bfd_boolean iq2000_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
|
||
static bfd_boolean iq2000_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
|
||
static bfd_boolean iq2000_elf_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
|
||
static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
||
|
||
|
||
static reloc_howto_type iq2000_elf_howto_table [] =
|
||
{
|
||
/* This reloc does nothing. */
|
||
|
||
HOWTO (R_IQ2000_NONE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_NONE", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 16 bit absolute relocation. */
|
||
HOWTO (R_IQ2000_16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32 bit absolute relocation. */
|
||
HOWTO (R_IQ2000_32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
31, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_32", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0x7fffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* 26 bit branch address. */
|
||
HOWTO (R_IQ2000_26, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
/* This needs complex overflow
|
||
detection, because the upper four
|
||
bits must match the PC. */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_26", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0x03ffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* 16 bit PC relative reference. */
|
||
HOWTO (R_IQ2000_PC16, /* 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_IQ2000_PC16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
TRUE), /* pcrel_offset */
|
||
|
||
/* high 16 bits of symbol value. */
|
||
HOWTO (R_IQ2000_HI16, /* type */
|
||
16, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
15, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
iq2000_elf_howto_hi16_reloc, /* special_function */
|
||
"R_IQ2000_HI16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0x7fff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* Low 16 bits of symbol value. */
|
||
HOWTO (R_IQ2000_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 */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_LO16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* 16-bit jump offset. */
|
||
HOWTO (R_IQ2000_OFFSET_16, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_OFFSET_16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* 21-bit jump offset. */
|
||
HOWTO (R_IQ2000_OFFSET_21, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
21, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_OFFSET_21", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x000000, /* src_mask */
|
||
0x1fffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* unsigned high 16 bits of value. */
|
||
HOWTO (R_IQ2000_OFFSET_21, /* type */
|
||
16, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_IQ2000_UHI16", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x0000, /* src_mask */
|
||
0x7fff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 32 bit absolute debug relocation. */
|
||
HOWTO (R_IQ2000_32_DEBUG, /* 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_IQ2000_32", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0x00000000, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
};
|
||
|
||
/* GNU extension to record C++ vtable hierarchy. */
|
||
static reloc_howto_type iq2000_elf_vtinherit_howto =
|
||
HOWTO (R_IQ2000_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_IQ2000_GNU_VTINHERIT", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE); /* pcrel_offset */
|
||
|
||
/* GNU extension to record C++ vtable member usage. */
|
||
static reloc_howto_type iq2000_elf_vtentry_howto =
|
||
HOWTO (R_IQ2000_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 */
|
||
NULL, /* special_function */
|
||
"R_IQ2000_GNU_VTENTRY", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
FALSE); /* pcrel_offset */
|
||
|
||
|
||
/* Map BFD reloc types to IQ2000 ELF reloc types. */
|
||
|
||
struct iq2000_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned int iq2000_reloc_val;
|
||
};
|
||
|
||
static const struct iq2000_reloc_map iq2000_reloc_map [] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_IQ2000_NONE },
|
||
{ BFD_RELOC_16, R_IQ2000_16 },
|
||
{ BFD_RELOC_32, R_IQ2000_32 },
|
||
{ BFD_RELOC_MIPS_JMP, R_IQ2000_26 },
|
||
{ BFD_RELOC_16_PCREL_S2, R_IQ2000_PC16 },
|
||
{ BFD_RELOC_HI16, R_IQ2000_HI16 },
|
||
{ BFD_RELOC_LO16, R_IQ2000_LO16 },
|
||
{ BFD_RELOC_IQ2000_OFFSET_16,R_IQ2000_OFFSET_16 },
|
||
{ BFD_RELOC_IQ2000_OFFSET_21,R_IQ2000_OFFSET_21 },
|
||
{ BFD_RELOC_IQ2000_UHI16, R_IQ2000_UHI16 },
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_IQ2000_GNU_VTINHERIT },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_IQ2000_GNU_VTENTRY },
|
||
};
|
||
|
||
static bfd_reloc_status_type
|
||
iq2000_elf_howto_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;
|
||
|
||
/* 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 (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;
|
||
|
||
/* if %lo will have sign-extension, compensate by add 0x10000 to hi portion */
|
||
if (relocation & 0x8000)
|
||
reloc_entry->addend += 0x10000;
|
||
|
||
/* Now do the reloc in the usual way. */
|
||
ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
/* put it back the way it was */
|
||
if (relocation & 0x8000)
|
||
reloc_entry->addend -= 0x10000;
|
||
|
||
return ret;
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
iq2000_elf_relocate_hi16 (input_bfd, relhi, contents, value)
|
||
bfd *input_bfd;
|
||
Elf_Internal_Rela *relhi;
|
||
bfd_byte *contents;
|
||
bfd_vma value;
|
||
{
|
||
bfd_vma insn;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
||
|
||
value += relhi->r_addend;
|
||
value &= 0x7fffffff; /* mask off top-bit which is Harvard mask bit */
|
||
|
||
/* if top-bit of %lo value is on, this means that %lo will
|
||
sign-propagate and so we compensate by adding 1 to %hi value */
|
||
if (value & 0x8000)
|
||
value += 0x10000;
|
||
|
||
value >>= 16;
|
||
insn = ((insn & ~0xFFFF) | value);
|
||
|
||
bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
iq2000_reloc_type_lookup (abfd, code)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
/* Note that the iq2000_elf_howto_table is indxed by the R_
|
||
constants. Thus, the order that the howto records appear in the
|
||
table *must* match the order of the relocation types defined in
|
||
include/elf/iq2000.h. */
|
||
|
||
switch (code)
|
||
{
|
||
case BFD_RELOC_NONE:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
|
||
case BFD_RELOC_16:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
|
||
case BFD_RELOC_32:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
|
||
case BFD_RELOC_MIPS_JMP:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
|
||
case BFD_RELOC_IQ2000_OFFSET_16:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
|
||
case BFD_RELOC_IQ2000_OFFSET_21:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
|
||
case BFD_RELOC_16_PCREL_S2:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
|
||
case BFD_RELOC_HI16:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
|
||
case BFD_RELOC_IQ2000_UHI16:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
|
||
case BFD_RELOC_LO16:
|
||
return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
|
||
case BFD_RELOC_VTABLE_INHERIT:
|
||
return &iq2000_elf_vtinherit_howto;
|
||
case BFD_RELOC_VTABLE_ENTRY:
|
||
return &iq2000_elf_vtentry_howto;
|
||
default:
|
||
/* Pacify gcc -Wall. */
|
||
return NULL;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Perform a single relocation. By default we use the standard BFD
|
||
routines. */
|
||
|
||
static bfd_reloc_status_type
|
||
iq2000_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
|
||
reloc_howto_type * howto;
|
||
bfd * input_bfd;
|
||
asection * input_section;
|
||
bfd_byte * contents;
|
||
Elf_Internal_Rela * rel;
|
||
bfd_vma relocation;
|
||
{
|
||
return _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
}
|
||
|
||
/* Set the howto pointer for a IQ2000 ELF reloc. */
|
||
|
||
static void
|
||
iq2000_info_to_howto_rela (abfd, cache_ptr, dst)
|
||
bfd * abfd ATTRIBUTE_UNUSED;
|
||
arelent * cache_ptr;
|
||
Elf_Internal_Rela * dst;
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
switch (r_type)
|
||
{
|
||
case R_IQ2000_GNU_VTINHERIT:
|
||
cache_ptr->howto = & iq2000_elf_vtinherit_howto;
|
||
break;
|
||
|
||
case R_IQ2000_GNU_VTENTRY:
|
||
cache_ptr->howto = & iq2000_elf_vtentry_howto;
|
||
break;
|
||
|
||
default:
|
||
cache_ptr->howto = & iq2000_elf_howto_table [r_type];
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* 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 bfd_boolean
|
||
iq2000_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;
|
||
Elf_Internal_Rela *rel;
|
||
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_IQ2000_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_IQ2000_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
case R_IQ2000_32:
|
||
/* For debug section, change to special harvard-aware relocations */
|
||
if (memcmp (sec->name, ".debug", 6) == 0
|
||
|| memcmp (sec->name, ".stab", 5) == 0
|
||
|| memcmp (sec->name, ".eh_frame", 9) == 0)
|
||
rel->r_info = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
|
||
break;
|
||
}
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Relocate a IQ2000 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 adjusting 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 bfd_boolean
|
||
iq2000_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;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
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;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if ( r_type == R_IQ2000_GNU_VTINHERIT
|
||
|| r_type == R_IQ2000_GNU_VTENTRY)
|
||
continue;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
/* This is a final link. */
|
||
howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
||
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;
|
||
#ifdef DEBUG
|
||
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
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes [r_symndx];
|
||
|
||
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;
|
||
|
||
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;
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
#ifdef DEBUG
|
||
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)
|
||
{
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "undefined: sec: %s, name: %s\n",
|
||
sec->name, name);
|
||
#endif
|
||
relocation = 0;
|
||
}
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset,
|
||
(!info->shared || info->no_undefined))))
|
||
return FALSE;
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "unknown: name: %s\n", name);
|
||
#endif
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_IQ2000_HI16:
|
||
r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
|
||
break;
|
||
|
||
case R_IQ2000_PC16:
|
||
rel->r_addend -= 4;
|
||
/* Fall through. */
|
||
|
||
default:
|
||
r = iq2000_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel, relocation);
|
||
break;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char * msg = (const char *) NULL;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
r = info->callbacks->reloc_overflow
|
||
(info, name, 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);
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
break;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
break;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
break;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
break;
|
||
}
|
||
|
||
if (msg)
|
||
r = info->callbacks->warning
|
||
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
||
|
||
if (! r)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Update the got entry reference counts for the section being
|
||
removed. */
|
||
|
||
static bfd_boolean
|
||
iq2000_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;
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
iq2000_elf_gc_mark_hook (sec, info, rel, h, sym)
|
||
asection * sec;
|
||
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_IQ2000_GNU_VTINHERIT:
|
||
case R_IQ2000_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 (sec->owner, sym->st_shndx);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Return the MACH for an e_flags value. */
|
||
|
||
static int
|
||
elf32_iq2000_machine (abfd)
|
||
bfd *abfd;
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
|
||
{
|
||
case EF_IQ2000_CPU_IQ2000: return bfd_mach_iq2000;
|
||
case EF_IQ2000_CPU_IQ10: return bfd_mach_iq10;
|
||
}
|
||
|
||
return bfd_mach_iq2000;
|
||
}
|
||
|
||
|
||
/* Function to set the ELF flag bits. */
|
||
|
||
static bfd_boolean
|
||
iq2000_elf_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Copy backend specific data from one object module to another. */
|
||
|
||
static bfd_boolean
|
||
iq2000_elf_copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
BFD_ASSERT (!elf_flags_init (obfd)
|
||
|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
|
||
|
||
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_flags_init (obfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
static bfd_boolean
|
||
iq2000_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags, old_partial;
|
||
flagword new_flags, new_partial;
|
||
bfd_boolean error = FALSE;
|
||
char new_opt[80];
|
||
char old_opt[80];
|
||
|
||
new_opt[0] = old_opt[0] = '\0';
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
#ifdef DEBUG
|
||
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
|
||
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
|
||
bfd_get_filename (ibfd));
|
||
#endif
|
||
|
||
if (!elf_flags_init (obfd))
|
||
{
|
||
/* First call, no flags set. */
|
||
elf_flags_init (obfd) = TRUE;
|
||
elf_elfheader (obfd)->e_flags = new_flags;
|
||
}
|
||
|
||
else if (new_flags == old_flags)
|
||
/* Compatible flags are ok. */
|
||
;
|
||
|
||
else /* Possibly incompatible flags. */
|
||
{
|
||
/* Warn if different cpu is used (allow a specific cpu to override
|
||
the generic cpu). */
|
||
new_partial = (new_flags & EF_IQ2000_CPU_MASK);
|
||
old_partial = (old_flags & EF_IQ2000_CPU_MASK);
|
||
if (new_partial == old_partial)
|
||
;
|
||
|
||
else
|
||
{
|
||
switch (new_partial)
|
||
{
|
||
default: strcat (new_opt, " -m2000"); break;
|
||
case EF_IQ2000_CPU_IQ2000: strcat (new_opt, " -m2000"); break;
|
||
case EF_IQ2000_CPU_IQ10: strcat (new_opt, " -m10"); break;
|
||
}
|
||
|
||
switch (old_partial)
|
||
{
|
||
default: strcat (old_opt, " -m2000"); break;
|
||
case EF_IQ2000_CPU_IQ2000: strcat (old_opt, " -m2000"); break;
|
||
case EF_IQ2000_CPU_IQ10: strcat (old_opt, " -m10"); break;
|
||
}
|
||
}
|
||
|
||
/* Print out any mismatches from above. */
|
||
if (new_opt[0])
|
||
{
|
||
error = TRUE;
|
||
(*_bfd_error_handler)
|
||
(_("%s: compiled with %s and linked with modules compiled with %s"),
|
||
bfd_get_filename (ibfd), new_opt, old_opt);
|
||
}
|
||
|
||
new_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
||
old_flags &= ~ EF_IQ2000_ALL_FLAGS;
|
||
|
||
/* Warn about any other mismatches. */
|
||
if (new_flags != old_flags)
|
||
{
|
||
error = TRUE;
|
||
(*_bfd_error_handler)
|
||
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
|
||
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
|
||
}
|
||
}
|
||
|
||
if (error)
|
||
bfd_set_error (bfd_error_bad_value);
|
||
|
||
return !error;
|
||
}
|
||
|
||
|
||
static bfd_boolean
|
||
iq2000_elf_print_private_bfd_data (abfd, ptr)
|
||
bfd *abfd;
|
||
PTR ptr;
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
flagword flags;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
/* Print normal ELF private data. */
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
flags = elf_elfheader (abfd)->e_flags;
|
||
fprintf (file, _("private flags = 0x%lx:"), (long)flags);
|
||
|
||
switch (flags & EF_IQ2000_CPU_MASK)
|
||
{
|
||
default: break;
|
||
case EF_IQ2000_CPU_IQ2000: fprintf (file, " -m2000"); break;
|
||
case EF_IQ2000_CPU_IQ10: fprintf (file, " -m10"); break;
|
||
}
|
||
|
||
fputc ('\n', file);
|
||
}
|
||
|
||
static
|
||
bfd_boolean
|
||
iq2000_elf_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
/* Irix 5 and 6 is broken. Object file symbol tables are not always
|
||
sorted correctly such that local symbols precede global symbols,
|
||
and the sh_info field in the symbol table is not always right. */
|
||
elf_bad_symtab (abfd) = TRUE;
|
||
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
|
||
elf32_iq2000_machine (abfd));
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
#define ELF_ARCH bfd_arch_iq2000
|
||
#define ELF_MACHINE_CODE EM_IQ2000
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
|
||
#define TARGET_BIG_NAME "elf32-iq2000"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto iq2000_info_to_howto_rela
|
||
#define elf_backend_relocate_section iq2000_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs iq2000_elf_check_relocs
|
||
#define elf_backend_object_p iq2000_elf_object_p
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
|
||
#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
|
||
#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
|
||
|
||
#include "elf32-target.h"
|