/* CGEN generic opcode support.
- Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1996-2021 Free Software Foundation, Inc.
- This file is part of the GNU Binutils and GDB, the GNU debugger.
+ This file is part of libopcodes.
- This program 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
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, 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.
+ It 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 "alloca-conf.h"
#include <stdio.h>
#include "ansidecl.h"
#include "libiberty.h"
#include "symcat.h"
#include "opcode/cgen.h"
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-
static unsigned int hash_keyword_name
(const CGEN_KEYWORD *, const char *, int);
static unsigned int hash_keyword_value
&& ! strchr (kt->nonalpha_chars, ke->name[i]))
{
size_t idx = strlen (kt->nonalpha_chars);
-
+
/* If you hit this limit, please don't just
increase the size of the field, instead
look for a better algorithm. */
/* Cover function to read and properly byteswap an insn value. */
CGEN_INSN_INT
-cgen_get_insn_value (CGEN_CPU_DESC cd, unsigned char *buf, int length)
+cgen_get_insn_value (CGEN_CPU_DESC cd, unsigned char *buf, int length,
+ int endian)
{
- int big_p = (cd->insn_endian == CGEN_ENDIAN_BIG);
+ int big_p = (endian == CGEN_ENDIAN_BIG);
int insn_chunk_bitsize = cd->insn_chunk_bitsize;
CGEN_INSN_INT value = 0;
segments, and endian-convert them, one at a time. */
int i;
- /* Enforce divisibility. */
+ /* Enforce divisibility. */
if ((length % insn_chunk_bitsize) != 0)
abort ();
for (i = 0; i < length; i += insn_chunk_bitsize) /* NB: i == bits */
{
- int index;
+ int bit_index;
bfd_vma this_value;
- index = i; /* NB: not dependent on endianness; opposite of cgen_put_insn_value! */
- this_value = bfd_get_bits (& buf[index / 8], insn_chunk_bitsize, big_p);
+
+ bit_index = i; /* NB: not dependent on endianness; opposite of cgen_put_insn_value! */
+ this_value = bfd_get_bits (& buf[bit_index / 8], insn_chunk_bitsize, big_p);
value = (value << insn_chunk_bitsize) | this_value;
}
}
else
{
- value = bfd_get_bits (buf, length, cd->insn_endian == CGEN_ENDIAN_BIG);
+ value = bfd_get_bits (buf, length, endian == CGEN_ENDIAN_BIG);
}
return value;
cgen_put_insn_value (CGEN_CPU_DESC cd,
unsigned char *buf,
int length,
- CGEN_INSN_INT value)
+ CGEN_INSN_INT value,
+ int endian)
{
- int big_p = (cd->insn_endian == CGEN_ENDIAN_BIG);
+ int big_p = (endian == CGEN_ENDIAN_BIG);
int insn_chunk_bitsize = cd->insn_chunk_bitsize;
if (insn_chunk_bitsize != 0 && insn_chunk_bitsize < length)
segments, and endian-convert them, one at a time. */
int i;
- /* Enforce divisibility. */
+ /* Enforce divisibility. */
if ((length % insn_chunk_bitsize) != 0)
abort ();
for (i = 0; i < length; i += insn_chunk_bitsize) /* NB: i == bits */
{
- int index;
- index = (length - insn_chunk_bitsize - i); /* NB: not dependent on endianness! */
- bfd_put_bits ((bfd_vma) value, & buf[index / 8], insn_chunk_bitsize, big_p);
+ int bit_index;
+
+ bit_index = (length - insn_chunk_bitsize - i); /* NB: not dependent on endianness! */
+ bfd_put_bits ((bfd_vma) value, & buf[bit_index / 8], insn_chunk_bitsize, big_p);
value >>= insn_chunk_bitsize;
}
}
CGEN_FIELDS *fields,
int alias_p)
{
- unsigned char *buf;
- CGEN_INSN_INT base_insn;
CGEN_EXTRACT_INFO ex_info;
CGEN_EXTRACT_INFO *info;
if (cd->int_insn_p)
{
info = NULL;
- buf = (unsigned char *) alloca (cd->max_insn_bitsize / 8);
- cgen_put_insn_value (cd, buf, length, insn_int_value);
- base_insn = insn_int_value;
+ insn_bytes_value = (unsigned char *) xmalloc (cd->max_insn_bitsize / 8);
+ cgen_put_insn_value (cd, insn_bytes_value, length, insn_int_value,
+ cd->insn_endian);
}
else
{
ex_info.dis_info = NULL;
ex_info.insn_bytes = insn_bytes_value;
ex_info.valid = -1;
- buf = insn_bytes_value;
- base_insn = cgen_get_insn_value (cd, buf, length);
+ insn_int_value = cgen_get_insn_value (cd, insn_bytes_value, length,
+ cd->insn_endian);
}
if (!insn)
/* The instructions are stored in hash lists.
Pick the first one and keep trying until we find the right one. */
- insn_list = cgen_dis_lookup_insn (cd, (char *) buf, base_insn);
+ insn_list = cgen_dis_lookup_insn (cd, (char *) insn_bytes_value,
+ insn_int_value);
while (insn_list != NULL)
{
insn = insn_list->insn;
/* Basic bit mask must be correct. */
/* ??? May wish to allow target to defer this check until the
extract handler. */
- if ((base_insn & CGEN_INSN_BASE_MASK (insn))
+ if ((insn_int_value & CGEN_INSN_BASE_MASK (insn))
== CGEN_INSN_BASE_VALUE (insn))
{
/* ??? 0 is passed for `pc' */
int elength = CGEN_EXTRACT_FN (cd, insn)
- (cd, insn, info, base_insn, fields, (bfd_vma) 0);
+ (cd, insn, info, insn_int_value, fields, (bfd_vma) 0);
if (elength > 0)
{
/* sanity check */
if (length != 0 && length != elength)
abort ();
- return insn;
+ break;
}
}
}
/* ??? 0 is passed for `pc' */
length = CGEN_EXTRACT_FN (cd, insn)
- (cd, insn, info, base_insn, fields, (bfd_vma) 0);
+ (cd, insn, info, insn_int_value, fields, (bfd_vma) 0);
/* Sanity check: must succeed.
Could relax this later if it ever proves useful. */
if (length == 0)
abort ();
- return insn;
}
- return NULL;
+ if (cd->int_insn_p)
+ free (insn_bytes_value);
+
+ return insn;
}
/* Fill in the operand instances used by INSN whose operands are FIELDS.
projects / thirdparty / binutils-gdb.git / blobdiff