/* CGEN generic disassembler support code.
|
/* CGEN generic disassembler support code.
|
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007
|
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
|
|
This file is part of libopcodes.
|
This file is part of libopcodes.
|
|
|
This library is free software; you can redistribute it and/or modify
|
This library is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3, or (at your option)
|
the Free Software Foundation; either version 3, or (at your option)
|
any later version.
|
any later version.
|
|
|
It is distributed in the hope that it will be useful, but WITHOUT
|
It is distributed in the hope that it will be useful, but WITHOUT
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
|
License for more details.
|
License for more details.
|
|
|
You should have received a copy of the GNU General Public License along
|
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.,
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
|
51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
#include "sysdep.h"
|
#include "sysdep.h"
|
#include <stdio.h>
|
#include <stdio.h>
|
#include "ansidecl.h"
|
#include "ansidecl.h"
|
#include "libiberty.h"
|
#include "libiberty.h"
|
#include "bfd.h"
|
#include "bfd.h"
|
#include "symcat.h"
|
#include "symcat.h"
|
#include "opcode/cgen.h"
|
#include "opcode/cgen.h"
|
|
|
static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
|
static CGEN_INSN_LIST * hash_insn_array (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
|
static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
|
static CGEN_INSN_LIST * hash_insn_list (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
|
static void build_dis_hash_table (CGEN_CPU_DESC);
|
static void build_dis_hash_table (CGEN_CPU_DESC);
|
static int count_decodable_bits (const CGEN_INSN *);
|
static int count_decodable_bits (const CGEN_INSN *);
|
static void add_insn_to_hash_chain (CGEN_INSN_LIST *,
|
static void add_insn_to_hash_chain (CGEN_INSN_LIST *,
|
const CGEN_INSN *,
|
const CGEN_INSN *,
|
CGEN_INSN_LIST **,
|
CGEN_INSN_LIST **,
|
unsigned int);
|
unsigned int);
|
|
|
/* Return the number of decodable bits in this insn. */
|
/* Return the number of decodable bits in this insn. */
|
static int
|
static int
|
count_decodable_bits (const CGEN_INSN *insn)
|
count_decodable_bits (const CGEN_INSN *insn)
|
{
|
{
|
unsigned mask = CGEN_INSN_BASE_MASK (insn);
|
unsigned mask = CGEN_INSN_BASE_MASK (insn);
|
int bits = 0;
|
int bits = 0;
|
int m;
|
int m;
|
for (m = 1; m != 0; m <<= 1)
|
for (m = 1; m != 0; m <<= 1)
|
{
|
{
|
if (mask & m)
|
if (mask & m)
|
++bits;
|
++bits;
|
}
|
}
|
return bits;
|
return bits;
|
}
|
}
|
|
|
/* Add an instruction to the hash chain. */
|
/* Add an instruction to the hash chain. */
|
static void
|
static void
|
add_insn_to_hash_chain (CGEN_INSN_LIST *hentbuf,
|
add_insn_to_hash_chain (CGEN_INSN_LIST *hentbuf,
|
const CGEN_INSN *insn,
|
const CGEN_INSN *insn,
|
CGEN_INSN_LIST **htable,
|
CGEN_INSN_LIST **htable,
|
unsigned int hash)
|
unsigned int hash)
|
{
|
{
|
CGEN_INSN_LIST *current_buf;
|
CGEN_INSN_LIST *current_buf;
|
CGEN_INSN_LIST *previous_buf;
|
CGEN_INSN_LIST *previous_buf;
|
int insn_decodable_bits;
|
int insn_decodable_bits;
|
|
|
/* Add insns sorted by the number of decodable bits, in decreasing order.
|
/* Add insns sorted by the number of decodable bits, in decreasing order.
|
This ensures that any insn which is a special case of another will be
|
This ensures that any insn which is a special case of another will be
|
checked first. */
|
checked first. */
|
insn_decodable_bits = count_decodable_bits (insn);
|
insn_decodable_bits = count_decodable_bits (insn);
|
previous_buf = NULL;
|
previous_buf = NULL;
|
for (current_buf = htable[hash]; current_buf != NULL;
|
for (current_buf = htable[hash]; current_buf != NULL;
|
current_buf = current_buf->next)
|
current_buf = current_buf->next)
|
{
|
{
|
int current_decodable_bits = count_decodable_bits (current_buf->insn);
|
int current_decodable_bits = count_decodable_bits (current_buf->insn);
|
if (insn_decodable_bits >= current_decodable_bits)
|
if (insn_decodable_bits >= current_decodable_bits)
|
break;
|
break;
|
previous_buf = current_buf;
|
previous_buf = current_buf;
|
}
|
}
|
|
|
/* Now insert the new insn. */
|
/* Now insert the new insn. */
|
hentbuf->insn = insn;
|
hentbuf->insn = insn;
|
hentbuf->next = current_buf;
|
hentbuf->next = current_buf;
|
if (previous_buf == NULL)
|
if (previous_buf == NULL)
|
htable[hash] = hentbuf;
|
htable[hash] = hentbuf;
|
else
|
else
|
previous_buf->next = hentbuf;
|
previous_buf->next = hentbuf;
|
}
|
}
|
|
|
/* Subroutine of build_dis_hash_table to add INSNS to the hash table.
|
/* Subroutine of build_dis_hash_table to add INSNS to the hash table.
|
|
|
COUNT is the number of elements in INSNS.
|
COUNT is the number of elements in INSNS.
|
ENTSIZE is sizeof (CGEN_IBASE) for the target.
|
ENTSIZE is sizeof (CGEN_IBASE) for the target.
|
??? No longer used but leave in for now.
|
??? No longer used but leave in for now.
|
HTABLE points to the hash table.
|
HTABLE points to the hash table.
|
HENTBUF is a pointer to sufficiently large buffer of hash entries.
|
HENTBUF is a pointer to sufficiently large buffer of hash entries.
|
The result is a pointer to the next entry to use.
|
The result is a pointer to the next entry to use.
|
|
|
The table is scanned backwards as additions are made to the front of the
|
The table is scanned backwards as additions are made to the front of the
|
list and we want earlier ones to be prefered. */
|
list and we want earlier ones to be prefered. */
|
|
|
static CGEN_INSN_LIST *
|
static CGEN_INSN_LIST *
|
hash_insn_array (CGEN_CPU_DESC cd,
|
hash_insn_array (CGEN_CPU_DESC cd,
|
const CGEN_INSN * insns,
|
const CGEN_INSN * insns,
|
int count,
|
int count,
|
int entsize ATTRIBUTE_UNUSED,
|
int entsize ATTRIBUTE_UNUSED,
|
CGEN_INSN_LIST ** htable,
|
CGEN_INSN_LIST ** htable,
|
CGEN_INSN_LIST * hentbuf)
|
CGEN_INSN_LIST * hentbuf)
|
{
|
{
|
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
|
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
|
int i;
|
int i;
|
|
|
for (i = count - 1; i >= 0; --i, ++hentbuf)
|
for (i = count - 1; i >= 0; --i, ++hentbuf)
|
{
|
{
|
unsigned int hash;
|
unsigned int hash;
|
char buf [4];
|
char buf [4];
|
unsigned long value;
|
unsigned long value;
|
const CGEN_INSN *insn = &insns[i];
|
const CGEN_INSN *insn = &insns[i];
|
|
|
if (! (* cd->dis_hash_p) (insn))
|
if (! (* cd->dis_hash_p) (insn))
|
continue;
|
continue;
|
|
|
/* We don't know whether the target uses the buffer or the base insn
|
/* We don't know whether the target uses the buffer or the base insn
|
to hash on, so set both up. */
|
to hash on, so set both up. */
|
|
|
value = CGEN_INSN_BASE_VALUE (insn);
|
value = CGEN_INSN_BASE_VALUE (insn);
|
bfd_put_bits ((bfd_vma) value,
|
bfd_put_bits ((bfd_vma) value,
|
buf,
|
buf,
|
CGEN_INSN_MASK_BITSIZE (insn),
|
CGEN_INSN_MASK_BITSIZE (insn),
|
big_p);
|
big_p);
|
hash = (* cd->dis_hash) (buf, value);
|
hash = (* cd->dis_hash) (buf, value);
|
add_insn_to_hash_chain (hentbuf, insn, htable, hash);
|
add_insn_to_hash_chain (hentbuf, insn, htable, hash);
|
}
|
}
|
|
|
return hentbuf;
|
return hentbuf;
|
}
|
}
|
|
|
/* Subroutine of build_dis_hash_table to add INSNS to the hash table.
|
/* Subroutine of build_dis_hash_table to add INSNS to the hash table.
|
This function is identical to hash_insn_array except the insns are
|
This function is identical to hash_insn_array except the insns are
|
in a list. */
|
in a list. */
|
|
|
static CGEN_INSN_LIST *
|
static CGEN_INSN_LIST *
|
hash_insn_list (CGEN_CPU_DESC cd,
|
hash_insn_list (CGEN_CPU_DESC cd,
|
const CGEN_INSN_LIST *insns,
|
const CGEN_INSN_LIST *insns,
|
CGEN_INSN_LIST **htable,
|
CGEN_INSN_LIST **htable,
|
CGEN_INSN_LIST *hentbuf)
|
CGEN_INSN_LIST *hentbuf)
|
{
|
{
|
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
|
int big_p = CGEN_CPU_ENDIAN (cd) == CGEN_ENDIAN_BIG;
|
const CGEN_INSN_LIST *ilist;
|
const CGEN_INSN_LIST *ilist;
|
|
|
for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
|
for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
|
{
|
{
|
unsigned int hash;
|
unsigned int hash;
|
char buf[4];
|
char buf[4];
|
unsigned long value;
|
unsigned long value;
|
|
|
if (! (* cd->dis_hash_p) (ilist->insn))
|
if (! (* cd->dis_hash_p) (ilist->insn))
|
continue;
|
continue;
|
|
|
/* We don't know whether the target uses the buffer or the base insn
|
/* We don't know whether the target uses the buffer or the base insn
|
to hash on, so set both up. */
|
to hash on, so set both up. */
|
|
|
value = CGEN_INSN_BASE_VALUE (ilist->insn);
|
value = CGEN_INSN_BASE_VALUE (ilist->insn);
|
bfd_put_bits((bfd_vma) value,
|
bfd_put_bits((bfd_vma) value,
|
buf,
|
buf,
|
CGEN_INSN_MASK_BITSIZE (ilist->insn),
|
CGEN_INSN_MASK_BITSIZE (ilist->insn),
|
big_p);
|
big_p);
|
hash = (* cd->dis_hash) (buf, value);
|
hash = (* cd->dis_hash) (buf, value);
|
add_insn_to_hash_chain (hentbuf, ilist->insn, htable, hash);
|
add_insn_to_hash_chain (hentbuf, ilist->insn, htable, hash);
|
}
|
}
|
|
|
return hentbuf;
|
return hentbuf;
|
}
|
}
|
|
|
/* Build the disassembler instruction hash table. */
|
/* Build the disassembler instruction hash table. */
|
|
|
static void
|
static void
|
build_dis_hash_table (CGEN_CPU_DESC cd)
|
build_dis_hash_table (CGEN_CPU_DESC cd)
|
{
|
{
|
int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
|
int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
|
CGEN_INSN_TABLE *insn_table = & cd->insn_table;
|
CGEN_INSN_TABLE *insn_table = & cd->insn_table;
|
CGEN_INSN_TABLE *macro_insn_table = & cd->macro_insn_table;
|
CGEN_INSN_TABLE *macro_insn_table = & cd->macro_insn_table;
|
unsigned int hash_size = cd->dis_hash_size;
|
unsigned int hash_size = cd->dis_hash_size;
|
CGEN_INSN_LIST *hash_entry_buf;
|
CGEN_INSN_LIST *hash_entry_buf;
|
CGEN_INSN_LIST **dis_hash_table;
|
CGEN_INSN_LIST **dis_hash_table;
|
CGEN_INSN_LIST *dis_hash_table_entries;
|
CGEN_INSN_LIST *dis_hash_table_entries;
|
|
|
/* The space allocated for the hash table consists of two parts:
|
/* The space allocated for the hash table consists of two parts:
|
the hash table and the hash lists. */
|
the hash table and the hash lists. */
|
|
|
dis_hash_table = (CGEN_INSN_LIST **)
|
dis_hash_table = (CGEN_INSN_LIST **)
|
xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
|
xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
|
memset (dis_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
|
memset (dis_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
|
dis_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
|
dis_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
|
xmalloc (count * sizeof (CGEN_INSN_LIST));
|
xmalloc (count * sizeof (CGEN_INSN_LIST));
|
|
|
/* Add compiled in insns.
|
/* Add compiled in insns.
|
Don't include the first one as it is a reserved entry. */
|
Don't include the first one as it is a reserved entry. */
|
/* ??? It was the end of all hash chains, and also the special
|
/* ??? It was the end of all hash chains, and also the special
|
"invalid insn" marker. May be able to do it differently now. */
|
"invalid insn" marker. May be able to do it differently now. */
|
|
|
hash_entry_buf = hash_insn_array (cd,
|
hash_entry_buf = hash_insn_array (cd,
|
insn_table->init_entries + 1,
|
insn_table->init_entries + 1,
|
insn_table->num_init_entries - 1,
|
insn_table->num_init_entries - 1,
|
insn_table->entry_size,
|
insn_table->entry_size,
|
dis_hash_table, hash_entry_buf);
|
dis_hash_table, hash_entry_buf);
|
|
|
/* Add compiled in macro-insns. */
|
/* Add compiled in macro-insns. */
|
|
|
hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
|
hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
|
macro_insn_table->num_init_entries,
|
macro_insn_table->num_init_entries,
|
macro_insn_table->entry_size,
|
macro_insn_table->entry_size,
|
dis_hash_table, hash_entry_buf);
|
dis_hash_table, hash_entry_buf);
|
|
|
/* Add runtime added insns.
|
/* Add runtime added insns.
|
Later added insns will be prefered over earlier ones. */
|
Later added insns will be prefered over earlier ones. */
|
|
|
hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
|
hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
|
dis_hash_table, hash_entry_buf);
|
dis_hash_table, hash_entry_buf);
|
|
|
/* Add runtime added macro-insns. */
|
/* Add runtime added macro-insns. */
|
|
|
hash_insn_list (cd, macro_insn_table->new_entries,
|
hash_insn_list (cd, macro_insn_table->new_entries,
|
dis_hash_table, hash_entry_buf);
|
dis_hash_table, hash_entry_buf);
|
|
|
cd->dis_hash_table = dis_hash_table;
|
cd->dis_hash_table = dis_hash_table;
|
cd->dis_hash_table_entries = dis_hash_table_entries;
|
cd->dis_hash_table_entries = dis_hash_table_entries;
|
}
|
}
|
|
|
/* Return the first entry in the hash list for INSN. */
|
/* Return the first entry in the hash list for INSN. */
|
|
|
CGEN_INSN_LIST *
|
CGEN_INSN_LIST *
|
cgen_dis_lookup_insn (CGEN_CPU_DESC cd, const char * buf, CGEN_INSN_INT value)
|
cgen_dis_lookup_insn (CGEN_CPU_DESC cd, const char * buf, CGEN_INSN_INT value)
|
{
|
{
|
unsigned int hash;
|
unsigned int hash;
|
|
|
if (cd->dis_hash_table == NULL)
|
if (cd->dis_hash_table == NULL)
|
build_dis_hash_table (cd);
|
build_dis_hash_table (cd);
|
|
|
hash = (* cd->dis_hash) (buf, value);
|
hash = (* cd->dis_hash) (buf, value);
|
|
|
return cd->dis_hash_table[hash];
|
return cd->dis_hash_table[hash];
|
}
|
}
|
|
|
