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binutils-gdb/bfd/elf32-iq2000.c

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/* 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;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
bfd_boolean changed = FALSE;
if (info->relocatable)
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)
{
((Elf_Internal_Rela *) rel)->r_info
= ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
changed = TRUE;
}
break;
}
}
if (changed)
/* Note that we've changed relocs, otherwise if !info->keep_memory
we'll free the relocs and lose our changes. */
(const Elf_Internal_Rela *) (elf_section_data (sec)->relocs) = relocs;
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 relocatable
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 relocatable 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
{
bfd_boolean unresolved_reloc;
bfd_boolean warned;
RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
symtab_hdr, relocation,
sec, unresolved_reloc, info, warned);
name = h->root.root.string;
}
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);
return TRUE;
}
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"
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