/* hash.c -- hash table routines for BFD
Copyright 1993, 1994, 1995, 1997, 1999, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
Written by Steve Chamberlain <sac@cygnus.com>
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "objalloc.h"
#include "libiberty.h"
/*
SECTION
Hash Tables
@cindex Hash tables
BFD provides a simple set of hash table functions. Routines
are provided to initialize a hash table, to free a hash table,
to look up a string in a hash table and optionally create an
entry for it, and to traverse a hash table. There is
currently no routine to delete an string from a hash table.
The basic hash table does not permit any data to be stored
with a string. However, a hash table is designed to present a
base class from which other types of hash tables may be
derived. These derived types may store additional information
with the string. Hash tables were implemented in this way,
rather than simply providing a data pointer in a hash table
entry, because they were designed for use by the linker back
ends. The linker may create thousands of hash table entries,
and the overhead of allocating private data and storing and
following pointers becomes noticeable.
The basic hash table code is in <<hash.c>>.
@menu
@* Creating and Freeing a Hash Table::
@* Looking Up or Entering a String::
@* Traversing a Hash Table::
@* Deriving a New Hash Table Type::
@end menu
INODE
Creating and Freeing a Hash Table, Looking Up or Entering a String, Hash Tables, Hash Tables
SUBSECTION
Creating and freeing a hash table
@findex bfd_hash_table_init
@findex bfd_hash_table_init_n
To create a hash table, create an instance of a <<struct
bfd_hash_table>> (defined in <<bfd.h>>) and call
<<bfd_hash_table_init>> (if you know approximately how many
entries you will need, the function <<bfd_hash_table_init_n>>,
which takes a @var{size} argument, may be used).
<<bfd_hash_table_init>> returns <<FALSE>> if some sort of
error occurs.
@findex bfd_hash_newfunc
The function <<bfd_hash_table_init>> take as an argument a
function to use to create new entries. For a basic hash
table, use the function <<bfd_hash_newfunc>>. @xref{Deriving
a New Hash Table Type}, for why you would want to use a
different value for this argument.
@findex bfd_hash_allocate
<<bfd_hash_table_init>> will create an objalloc which will be
used to allocate new entries. You may allocate memory on this
objalloc using <<bfd_hash_allocate>>.
@findex bfd_hash_table_free
Use <<bfd_hash_table_free>> to free up all the memory that has
been allocated for a hash table. This will not free up the
<<struct bfd_hash_table>> itself, which you must provide.
@findex bfd_hash_set_default_size
Use <<bfd_hash_set_default_size>> to set the default size of
hash table to use.
INODE
Looking Up or Entering a String, Traversing a Hash Table, Creating and Freeing a Hash Table, Hash Tables
SUBSECTION
Looking up or entering a string
@findex bfd_hash_lookup
The function <<bfd_hash_lookup>> is used both to look up a
string in the hash table and to create a new entry.
If the @var{create} argument is <<FALSE>>, <<bfd_hash_lookup>>
will look up a string. If the string is found, it will
returns a pointer to a <<struct bfd_hash_entry>>. If the
string is not found in the table <<bfd_hash_lookup>> will
return <<NULL>>. You should not modify any of the fields in
the returns <<struct bfd_hash_entry>>.
If the @var{create} argument is <<TRUE>>, the string will be
entered into the hash table if it is not already there.
Either way a pointer to a <<struct bfd_hash_entry>> will be
returned, either to the existing structure or to a newly
created one. In this case, a <<NULL>> return means that an
error occurred.
If the @var{create} argument is <<TRUE>>, and a new entry is
created, the @var{copy} argument is used to decide whether to
copy the string onto the hash table objalloc or not. If
@var{copy} is passed as <<FALSE>>, you must be careful not to
deallocate or modify the string as long as the hash table
exists.
INODE
Traversing a Hash Table, Deriving a New Hash Table Type, Looking Up or Entering a String, Hash Tables
SUBSECTION
Traversing a hash table
@findex bfd_hash_traverse
The function <<bfd_hash_traverse>> may be used to traverse a
hash table, calling a function on each element. The traversal
is done in a random order.
<<bfd_hash_traverse>> takes as arguments a function and a
generic <<void *>> pointer. The function is called with a
hash table entry (a <<struct bfd_hash_entry *>>) and the
generic pointer passed to <<bfd_hash_traverse>>. The function
must return a <<boolean>> value, which indicates whether to
continue traversing the hash table. If the function returns
<<FALSE>>, <<bfd_hash_traverse>> will stop the traversal and
return immediately.
INODE
Deriving a New Hash Table Type, , Traversing a Hash Table, Hash Tables
SUBSECTION
Deriving a new hash table type
Many uses of hash tables want to store additional information
which each entry in the hash table. Some also find it
convenient to store additional information with the hash table
itself. This may be done using a derived hash table.
Since C is not an object oriented language, creating a derived
hash table requires sticking together some boilerplate
routines with a few differences specific to the type of hash
table you want to create.
An example of a derived hash table is the linker hash table.
The structures for this are defined in <<bfdlink.h>>. The
functions are in <<linker.c>>.
You may also derive a hash table from an already derived hash
table. For example, the a.out linker backend code uses a hash
table derived from the linker hash table.
@menu
@* Define the Derived Structures::
@* Write the Derived Creation Routine::
@* Write Other Derived Routines::
@end menu
INODE
Define the Derived Structures, Write the Derived Creation Routine, Deriving a New Hash Table Type, Deriving a New Hash Table Type
SUBSUBSECTION
Define the derived structures
You must define a structure for an entry in the hash table,
and a structure for the hash table itself.
The first field in the structure for an entry in the hash
table must be of the type used for an entry in the hash table
you are deriving from. If you are deriving from a basic hash
table this is <<struct bfd_hash_entry>>, which is defined in
<<bfd.h>>. The first field in the structure for the hash
table itself must be of the type of the hash table you are
deriving from itself. If you are deriving from a basic hash
table, this is <<struct bfd_hash_table>>.
For example, the linker hash table defines <<struct
bfd_link_hash_entry>> (in <<bfdlink.h>>). The first field,
<<root>>, is of type <<struct bfd_hash_entry>>. Similarly,
the first field in <<struct bfd_link_hash_table>>, <<table>>,
is of type <<struct bfd_hash_table>>.
INODE
Write the Derived Creation Routine, Write Other Derived Routines, Define the Derived Structures, Deriving a New Hash Table Type
SUBSUBSECTION
Write the derived creation routine
You must write a routine which will create and initialize an
entry in the hash table. This routine is passed as the
function argument to <<bfd_hash_table_init>>.
In order to permit other hash tables to be derived from the
hash table you are creating, this routine must be written in a
standard way.
The first argument to the creation routine is a pointer to a
hash table entry. This may be <<NULL>>, in which case the
routine should allocate the right amount of space. Otherwise
the space has already been allocated by a hash table type
derived from this one.
After allocating space, the creation routine must call the
creation routine of the hash table type it is derived from,
passing in a pointer to the space it just allocated. This
will initialize any fields used by the base hash table.
Finally the creation routine must initialize any local fields
for the new hash table type.
Here is a boilerplate example of a creation routine.
@var{function_name} is the name of the routine.
@var{entry_type} is the type of an entry in the hash table you
are creating. @var{base_newfunc} is the name of the creation
routine of the hash table type your hash table is derived
from.
EXAMPLE
.struct bfd_hash_entry *
.@var{function_name} (struct bfd_hash_entry *entry,
. struct bfd_hash_table *table,
. const char *string)
.{
. struct @var{entry_type} *ret = (@var{entry_type} *) entry;
.
. {* Allocate the structure if it has not already been allocated by a
. derived class. *}
. if (ret == NULL)
. {
. ret = bfd_hash_allocate (table, sizeof (* ret));
. if (ret == NULL)
. return NULL;
. }
.
. {* Call the allocation method of the base class. *}
. ret = ((@var{entry_type} *)
. @var{base_newfunc} ((struct bfd_hash_entry *) ret, table, string));
.
. {* Initialize the local fields here. *}
.
. return (struct bfd_hash_entry *) ret;
.}
DESCRIPTION
The creation routine for the linker hash table, which is in
<<linker.c>>, looks just like this example.
@var{function_name} is <<_bfd_link_hash_newfunc>>.
@var{entry_type} is <<struct bfd_link_hash_entry>>.
@var{base_newfunc} is <<bfd_hash_newfunc>>, the creation
routine for a basic hash table.
<<_bfd_link_hash_newfunc>> also initializes the local fields
in a linker hash table entry: <<type>>, <<written>> and
<<next>>.
INODE
Write Other Derived Routines, , Write the Derived Creation Routine, Deriving a New Hash Table Type
SUBSUBSECTION
Write other derived routines
You will want to write other routines for your new hash table,
as well.
You will want an initialization routine which calls the
initialization routine of the hash table you are deriving from
and initializes any other local fields. For the linker hash
table, this is <<_bfd_link_hash_table_init>> in <<linker.c>>.
You will want a lookup routine which calls the lookup routine
of the hash table you are deriving from and casts the result.
The linker hash table uses <<bfd_link_hash_lookup>> in
<<linker.c>> (this actually takes an additional argument which
it uses to decide how to return the looked up value).
You may want a traversal routine. This should just call the
traversal routine of the hash table you are deriving from with
appropriate casts. The linker hash table uses
<<bfd_link_hash_traverse>> in <<linker.c>>.
These routines may simply be defined as macros. For example,
the a.out backend linker hash table, which is derived from the
linker hash table, uses macros for the lookup and traversal
routines. These are <<aout_link_hash_lookup>> and
<<aout_link_hash_traverse>> in aoutx.h.
*/
/* The default number of entries to use when creating a hash table. */
#define DEFAULT_SIZE 4051
/* The following function returns a nearest prime number which is
greater than N, and near a power of two. Copied from libiberty.
Returns zero for ridiculously large N to signify an error. */
static unsigned long
higher_prime_number (unsigned long n)
{
/* These are primes that are near, but slightly smaller than, a
power of two. */
static const unsigned long primes[] =
{
(unsigned long) 31,
(unsigned long) 61,
(unsigned long) 127,
(unsigned long) 251,
(unsigned long) 509,
(unsigned long) 1021,
(unsigned long) 2039,
(unsigned long) 4093,
(unsigned long) 8191,
(unsigned long) 16381,
(unsigned long) 32749,
(unsigned long) 65521,
(unsigned long) 131071,
(unsigned long) 262139,
(unsigned long) 524287,
(unsigned long) 1048573,
(unsigned long) 2097143,
(unsigned long) 4194301,
(unsigned long) 8388593,
(unsigned long) 16777213,
(unsigned long) 33554393,
(unsigned long) 67108859,
(unsigned long) 134217689,
(unsigned long) 268435399,
(unsigned long) 536870909,
(unsigned long) 1073741789,
(unsigned long) 2147483647,
/* 4294967291L */
((unsigned long) 2147483647) + ((unsigned long) 2147483644),
};
const unsigned long *low = &primes[0];
const unsigned long *high = &primes[sizeof (primes) / sizeof (primes[0])];
while (low != high)
{
const unsigned long *mid = low + (high - low) / 2;
if (n >= *mid)
low = mid + 1;
else
high = mid;
}
if (n >= *low)
return 0;
return *low;
}
static unsigned long bfd_default_hash_table_size = DEFAULT_SIZE;
/* Create a new hash table, given a number of entries. */
bfd_boolean
bfd_hash_table_init_n (struct bfd_hash_table *table,
struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *),
unsigned int entsize,
unsigned int size)
{
unsigned long alloc;
alloc = size;
alloc *= sizeof (struct bfd_hash_entry *);
if (alloc / sizeof (struct bfd_hash_entry *) != size)
{
bfd_set_error (bfd_error_no_memory);
return FALSE;
}
table->memory = (void *) objalloc_create ();
if (table->memory == NULL)
{
bfd_set_error (bfd_error_no_memory);
return FALSE;
}
table->table = (struct bfd_hash_entry **)
objalloc_alloc ((struct objalloc *) table->memory, alloc);
if (table->table == NULL)
{
bfd_set_error (bfd_error_no_memory);
return FALSE;
}
memset ((void *) table
->table
, 0, alloc
); table->size = size;
table->entsize = entsize;
table->count = 0;
table->frozen = 0;
table->newfunc = newfunc;
return TRUE;
}
/* Create a new hash table with the default number of entries. */
bfd_boolean
bfd_hash_table_init (struct bfd_hash_table *table,
struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *),
unsigned int entsize)
{
return bfd_hash_table_init_n (table, newfunc, entsize,
bfd_default_hash_table_size);
}
/* Free a hash table. */
void
bfd_hash_table_free (struct bfd_hash_table *table)
{
objalloc_free ((struct objalloc *) table->memory);
table->memory = NULL;
}
static inline unsigned long
bfd_hash_hash (const char *string, unsigned int *lenp)
{
const unsigned char *s;
unsigned long hash;
unsigned int len;
unsigned int c;
hash = 0;
len = 0;
s = (const unsigned char *) string;
while ((c = *s++) != '\0')
{
hash += c + (c << 17);
hash ^= hash >> 2;
}
len = (s - (const unsigned char *) string) - 1;
hash += len + (len << 17);
hash ^= hash >> 2;
if (lenp != NULL)
*lenp = len;
return hash;
}
/* Look up a string in a hash table. */
struct bfd_hash_entry *
bfd_hash_lookup (struct bfd_hash_table *table,
const char *string,
bfd_boolean create,
bfd_boolean copy)
{
unsigned long hash;
struct bfd_hash_entry *hashp;
unsigned int len;
unsigned int _index;
hash = bfd_hash_hash (string, &len);
_index = hash % table->size;
for (hashp = table->table[_index];
hashp != NULL;
hashp = hashp->next)
{
if (hashp->hash == hash
&& strcmp (hashp
->string
, string
) == 0) return hashp;
}
if (! create)
return NULL;
if (copy)
{
char *new_string;
new_string = (char *) objalloc_alloc ((struct objalloc *) table->memory,
len + 1);
if (!new_string)
{
bfd_set_error (bfd_error_no_memory);
return NULL;
}
memcpy (new_string
, string
, len
+ 1); string = new_string;
}
return bfd_hash_insert (table, string, hash);
}
/* Insert an entry in a hash table. */
struct bfd_hash_entry *
bfd_hash_insert (struct bfd_hash_table *table,
const char *string,
unsigned long hash)
{
struct bfd_hash_entry *hashp;
unsigned int _index;
hashp = (*table->newfunc) (NULL, table, string);
if (hashp == NULL)
return NULL;
hashp->string = string;
hashp->hash = hash;
_index = hash % table->size;
hashp->next = table->table[_index];
table->table[_index] = hashp;
table->count++;
if (!table->frozen && table->count > table->size * 3 / 4)
{
unsigned long newsize = higher_prime_number (table->size);
struct bfd_hash_entry **newtable;
unsigned int hi;
unsigned long alloc = newsize * sizeof (struct bfd_hash_entry *);
/* If we can't find a higher prime, or we can't possibly alloc
that much memory, don't try to grow the table. */
if (newsize == 0 || alloc / sizeof (struct bfd_hash_entry *) != newsize)
{
table->frozen = 1;
return hashp;
}
newtable = ((struct bfd_hash_entry **)
objalloc_alloc ((struct objalloc *) table->memory, alloc));
if (newtable == NULL)
{
table->frozen = 1;
return hashp;
}
for (hi = 0; hi < table->size; hi ++)
while (table->table[hi])
{
struct bfd_hash_entry *chain = table->table[hi];
struct bfd_hash_entry *chain_end = chain;
while (chain_end->next && chain_end->next->hash == chain->hash)
chain_end = chain_end->next;
table->table[hi] = chain_end->next;
_index = chain->hash % newsize;
chain_end->next = newtable[_index];
newtable[_index] = chain;
}
table->table = newtable;
table->size = newsize;
}
return hashp;
}
/* Rename an entry in a hash table. */
void
bfd_hash_rename (struct bfd_hash_table *table,
const char *string,
struct bfd_hash_entry *ent)
{
unsigned int _index;
struct bfd_hash_entry **pph;
_index = ent->hash % table->size;
for (pph = &table->table[_index]; *pph != NULL; pph = &(*pph)->next)
if (*pph == ent)
break;
if (*pph == NULL)
*pph = ent->next;
ent->string = string;
ent->hash = bfd_hash_hash (string, NULL);
_index = ent->hash % table->size;
ent->next = table->table[_index];
table->table[_index] = ent;
}
/* Replace an entry in a hash table. */
void
bfd_hash_replace (struct bfd_hash_table *table,
struct bfd_hash_entry *old,
struct bfd_hash_entry *nw)
{
unsigned int _index;
struct bfd_hash_entry **pph;
_index = old->hash % table->size;
for (pph = &table->table[_index];
(*pph) != NULL;
pph = &(*pph)->next)
{
if (*pph == old)
{
*pph = nw;
return;
}
}
}
/* Allocate space in a hash table. */
void *
bfd_hash_allocate (struct bfd_hash_table *table,
unsigned int size)
{
void * ret;
ret = objalloc_alloc ((struct objalloc *) table->memory, size);
if (ret == NULL && size != 0)
bfd_set_error (bfd_error_no_memory);
return ret;
}
/* Base method for creating a new hash table entry. */
struct bfd_hash_entry *
bfd_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string ATTRIBUTE_UNUSED)
{
if (entry == NULL)
entry = (struct bfd_hash_entry *) bfd_hash_allocate (table,
sizeof (* entry));
return entry;
}
/* Traverse a hash table. */
void
bfd_hash_traverse (struct bfd_hash_table *table,
bfd_boolean (*func) (struct bfd_hash_entry *, void *),
void * info)
{
unsigned int i;
table->frozen = 1;
for (i = 0; i < table->size; i++)
{
struct bfd_hash_entry *p;
for (p = table->table[i]; p != NULL; p = p->next)
if (! (*func) (p, info))
goto out;
}
out:
table->frozen = 0;
}
unsigned long
bfd_hash_set_default_size (unsigned long hash_size)
{
/* Extend this prime list if you want more granularity of hash table size. */
static const unsigned long hash_size_primes[] =
{
31, 61, 127, 251, 509, 1021, 2039, 4091, 8191, 16381, 32749, 65537
};
unsigned int _index;
/* Work out best prime number near the hash_size. */
for (_index = 0; _index < ARRAY_SIZE (hash_size_primes) - 1; ++_index)
if (hash_size <= hash_size_primes[_index])
break;
bfd_default_hash_table_size = hash_size_primes[_index];
return bfd_default_hash_table_size;
}
/* A few different object file formats (a.out, COFF, ELF) use a string
table. These functions support adding strings to a string table,
returning the byte offset, and writing out the table.
Possible improvements:
+ look for strings matching trailing substrings of other strings
+ better data structures? balanced trees?
+ look at reducing memory use elsewhere -- maybe if we didn't have
to construct the entire symbol table at once, we could get by
with smaller amounts of VM? (What effect does that have on the
string table reductions?) */
/* An entry in the strtab hash table. */
struct strtab_hash_entry
{
struct bfd_hash_entry root;
/* Index in string table. */
bfd_size_type index;
/* Next string in strtab. */
struct strtab_hash_entry *next;
};
/* The strtab hash table. */
struct bfd_strtab_hash
{
struct bfd_hash_table table;
/* Size of strtab--also next available index. */
bfd_size_type size;
/* First string in strtab. */
struct strtab_hash_entry *first;
/* Last string in strtab. */
struct strtab_hash_entry *last;
/* Whether to precede strings with a two byte length, as in the
XCOFF .debug section. */
bfd_boolean xcoff;
};
/* Routine to create an entry in a strtab. */
static struct bfd_hash_entry *
strtab_hash_newfunc (struct bfd_hash_entry *entry,
struct bfd_hash_table *table,
const char *string)
{
struct strtab_hash_entry *ret = (struct strtab_hash_entry *) entry;
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (ret == NULL)
ret = (struct strtab_hash_entry *) bfd_hash_allocate (table,
sizeof (* ret));
if (ret == NULL)
return NULL;
/* Call the allocation method of the superclass. */
ret = (struct strtab_hash_entry *)
bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string);
if (ret)
{
/* Initialize the local fields. */
ret->index = (bfd_size_type) -1;
ret->next = NULL;
}
return (struct bfd_hash_entry *) ret;
}
/* Look up an entry in an strtab. */
#define strtab_hash_lookup(t, string, create, copy) \
((struct strtab_hash_entry *) \
bfd_hash_lookup (&(t)->table, (string), (create), (copy)))
/* Create a new strtab. */
struct bfd_strtab_hash *
_bfd_stringtab_init (void)
{
struct bfd_strtab_hash *table;
bfd_size_type amt = sizeof (* table);
table = (struct bfd_strtab_hash *) bfd_malloc (amt);
if (table == NULL)
return NULL;
if (!bfd_hash_table_init (&table->table, strtab_hash_newfunc,
sizeof (struct strtab_hash_entry)))
{
return NULL;
}
table->size = 0;
table->first = NULL;
table->last = NULL;
table->xcoff = FALSE;
return table;
}
/* Create a new strtab in which the strings are output in the format
used in the XCOFF .debug section: a two byte length precedes each
string. */
struct bfd_strtab_hash *
_bfd_xcoff_stringtab_init (void)
{
struct bfd_strtab_hash *ret;
ret = _bfd_stringtab_init ();
if (ret != NULL)
ret->xcoff = TRUE;
return ret;
}
/* Free a strtab. */
void
_bfd_stringtab_free (struct bfd_strtab_hash *table)
{
bfd_hash_table_free (&table->table);
}
/* Get the index of a string in a strtab, adding it if it is not
already present. If HASH is FALSE, we don't really use the hash
table, and we don't eliminate duplicate strings. If COPY is true
then store a copy of STR if creating a new entry. */
bfd_size_type
_bfd_stringtab_add (struct bfd_strtab_hash *tab,
const char *str,
bfd_boolean hash,
bfd_boolean copy)
{
struct strtab_hash_entry *entry;
if (hash)
{
entry = strtab_hash_lookup (tab, str, TRUE, copy);
if (entry == NULL)
return (bfd_size_type) -1;
}
else
{
entry = (struct strtab_hash_entry *) bfd_hash_allocate (&tab->table,
sizeof (* entry));
if (entry == NULL)
return (bfd_size_type) -1;
if (! copy)
entry->root.string = str;
else
{
size_t len
= strlen (str
) + 1; char *n;
n = (char *) bfd_hash_allocate (&tab->table, len);
if (n == NULL)
return (bfd_size_type) -1;
entry->root.string = n;
}
entry->index = (bfd_size_type) -1;
entry->next = NULL;
}
if (entry->index == (bfd_size_type) -1)
{
entry->index = tab->size;
tab
->size
+= strlen (str
) + 1; if (tab->xcoff)
{
entry->index += 2;
tab->size += 2;
}
if (tab->first == NULL)
tab->first = entry;
else
tab->last->next = entry;
tab->last = entry;
}
return entry->index;
}
/* Get the number of bytes in a strtab. */
bfd_size_type
_bfd_stringtab_size (struct bfd_strtab_hash *tab)
{
return tab->size;
}
/* Write out a strtab. ABFD must already be at the right location in
the file. */
bfd_boolean
_bfd_stringtab_emit (bfd *abfd, struct bfd_strtab_hash *tab)
{
bfd_boolean xcoff;
struct strtab_hash_entry *entry;
xcoff = tab->xcoff;
for (entry = tab->first; entry != NULL; entry = entry->next)
{
const char *str;
size_t len;
str = entry->root.string;
if (xcoff)
{
bfd_byte buf[2];
/* The output length includes the null byte. */
bfd_put_16 (abfd, (bfd_vma) len, buf);
if (bfd_bwrite ((void *) buf, (bfd_size_type) 2, abfd) != 2)
return FALSE;
}
if (bfd_bwrite ((void *) str, (bfd_size_type) len, abfd) != len)
return FALSE;
}
return TRUE;
}