mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-23 15:32:26 +00:00
1633 lines
38 KiB
C
1633 lines
38 KiB
C
/* Print Motorola 68k instructions.
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Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
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2012 Free Software Foundation, Inc.
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This file is part of the GNU opcodes library.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "dis-asm.h"
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#include "floatformat.h"
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#include "libiberty.h"
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#include "opintl.h"
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#include "opcode/m68k.h"
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/* Local function prototypes. */
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const char * const fpcr_names[] =
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{
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"", "%fpiar", "%fpsr", "%fpiar/%fpsr", "%fpcr",
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"%fpiar/%fpcr", "%fpsr/%fpcr", "%fpiar/%fpsr/%fpcr"
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};
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static char *const reg_names[] =
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{
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"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
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"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",
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"%ps", "%pc"
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};
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/* Name of register halves for MAC/EMAC.
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Seperate from reg_names since 'spu', 'fpl' look weird. */
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static char *const reg_half_names[] =
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{
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"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
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"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
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"%ps", "%pc"
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};
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/* Sign-extend an (unsigned char). */
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#if __STDC__ == 1
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#define COERCE_SIGNED_CHAR(ch) ((signed char) (ch))
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#else
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#define COERCE_SIGNED_CHAR(ch) ((int) (((ch) ^ 0x80) & 0xFF) - 128)
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#endif
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/* Get a 1 byte signed integer. */
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#define NEXTBYTE(p, val) \
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do \
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{ \
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p += 2; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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val = COERCE_SIGNED_CHAR (p[-1]); \
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} \
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while (0)
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/* Get a 2 byte signed integer. */
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#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
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#define NEXTWORD(p, val, ret_val) \
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do \
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{ \
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p += 2; \
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if (!FETCH_DATA (info, p)) \
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return ret_val; \
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val = COERCE16 ((p[-2] << 8) + p[-1]); \
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} \
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while (0)
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/* Get a 4 byte signed integer. */
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#define COERCE32(x) ((bfd_signed_vma) ((x) ^ 0x80000000) - 0x80000000)
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#define NEXTLONG(p, val, ret_val) \
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do \
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{ \
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p += 4; \
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if (!FETCH_DATA (info, p)) \
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return ret_val; \
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val = COERCE32 ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
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} \
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while (0)
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/* Get a 4 byte unsigned integer. */
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#define NEXTULONG(p, val) \
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do \
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{ \
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p += 4; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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val = (unsigned int) ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
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} \
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while (0)
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/* Get a single precision float. */
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#define NEXTSINGLE(val, p) \
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do \
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{ \
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p += 4; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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floatformat_to_double (& floatformat_ieee_single_big, \
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(char *) p - 4, & val); \
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} \
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while (0)
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/* Get a double precision float. */
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#define NEXTDOUBLE(val, p) \
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do \
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{ \
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p += 8; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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floatformat_to_double (& floatformat_ieee_double_big, \
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(char *) p - 8, & val); \
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} \
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while (0)
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/* Get an extended precision float. */
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#define NEXTEXTEND(val, p) \
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do \
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{ \
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p += 12; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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floatformat_to_double (& floatformat_m68881_ext, \
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(char *) p - 12, & val); \
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} \
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while (0)
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/* Need a function to convert from packed to double
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precision. Actually, it's easier to print a
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packed number than a double anyway, so maybe
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there should be a special case to handle this... */
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#define NEXTPACKED(p, val) \
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do \
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{ \
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p += 12; \
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if (!FETCH_DATA (info, p)) \
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return -3; \
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val = 0.0; \
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} \
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while (0)
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/* Maximum length of an instruction. */
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#define MAXLEN 22
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#include <setjmp.h>
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struct private
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{
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/* Points to first byte not fetched. */
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bfd_byte *max_fetched;
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bfd_byte the_buffer[MAXLEN];
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bfd_vma insn_start;
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};
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/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
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to ADDR (exclusive) are valid. Returns 1 for success, 0 on error. */
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#define FETCH_DATA(info, addr) \
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((addr) <= ((struct private *) (info->private_data))->max_fetched \
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? 1 : fetch_data ((info), (addr)))
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static int
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fetch_data (struct disassemble_info *info, bfd_byte *addr)
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{
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int status;
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struct private *priv = (struct private *)info->private_data;
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bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
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status = (*info->read_memory_func) (start,
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priv->max_fetched,
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addr - priv->max_fetched,
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info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, start, info);
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return 0;
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}
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else
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priv->max_fetched = addr;
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return 1;
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}
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/* This function is used to print to the bit-bucket. */
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static int
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dummy_printer (FILE *file ATTRIBUTE_UNUSED,
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const char *format ATTRIBUTE_UNUSED,
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...)
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{
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return 0;
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}
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static void
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dummy_print_address (bfd_vma vma ATTRIBUTE_UNUSED,
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struct disassemble_info *info ATTRIBUTE_UNUSED)
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{
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}
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/* Fetch BITS bits from a position in the instruction specified by CODE.
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CODE is a "place to put an argument", or 'x' for a destination
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that is a general address (mode and register).
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BUFFER contains the instruction.
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Returns -1 on failure. */
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static int
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fetch_arg (unsigned char *buffer,
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int code,
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int bits,
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disassemble_info *info)
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{
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int val = 0;
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switch (code)
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{
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case '/': /* MAC/EMAC mask bit. */
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val = buffer[3] >> 5;
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break;
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case 'G': /* EMAC ACC load. */
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val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
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break;
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case 'H': /* EMAC ACC !load. */
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val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
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break;
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case ']': /* EMAC ACCEXT bit. */
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val = buffer[0] >> 2;
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break;
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case 'I': /* MAC/EMAC scale factor. */
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val = buffer[2] >> 1;
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break;
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case 'F': /* EMAC ACCx. */
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val = buffer[0] >> 1;
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break;
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case 'f':
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val = buffer[1];
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break;
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case 's':
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val = buffer[1];
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break;
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case 'd': /* Destination, for register or quick. */
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val = (buffer[0] << 8) + buffer[1];
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val >>= 9;
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break;
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case 'x': /* Destination, for general arg. */
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val = (buffer[0] << 8) + buffer[1];
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val >>= 6;
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break;
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case 'k':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[3] >> 4);
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break;
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case 'C':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = buffer[3];
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break;
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case '1':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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val >>= 12;
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break;
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case '2':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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val >>= 6;
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break;
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case '3':
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case 'j':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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break;
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case '4':
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if (! FETCH_DATA (info, buffer + 5))
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return -1;
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val = (buffer[4] << 8) + buffer[5];
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val >>= 12;
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break;
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case '5':
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if (! FETCH_DATA (info, buffer + 5))
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return -1;
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val = (buffer[4] << 8) + buffer[5];
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val >>= 6;
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break;
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case '6':
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if (! FETCH_DATA (info, buffer + 5))
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return -1;
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val = (buffer[4] << 8) + buffer[5];
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break;
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case '7':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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val >>= 7;
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break;
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case '8':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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val >>= 10;
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break;
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case '9':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] << 8) + buffer[3];
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val >>= 5;
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break;
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case 'e':
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val = (buffer[1] >> 6);
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break;
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case 'E':
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if (! FETCH_DATA (info, buffer + 3))
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return -1;
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val = (buffer[2] >> 1);
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break;
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case 'm':
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val = (buffer[1] & 0x40 ? 0x8 : 0)
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| ((buffer[0] >> 1) & 0x7)
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| (buffer[3] & 0x80 ? 0x10 : 0);
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break;
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case 'n':
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val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
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break;
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case 'o':
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val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
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break;
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case 'M':
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val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
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break;
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case 'N':
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val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
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break;
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case 'h':
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val = buffer[2] >> 2;
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break;
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default:
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abort ();
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}
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/* bits is never too big. */
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return val & ((1 << bits) - 1);
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}
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/* Check if an EA is valid for a particular code. This is required
|
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for the EMAC instructions since the type of source address determines
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if it is a EMAC-load instruciton if the EA is mode 2-5, otherwise it
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is a non-load EMAC instruction and the bits mean register Ry.
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A similar case exists for the movem instructions where the register
|
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mask is interpreted differently for different EAs. */
|
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static bfd_boolean
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m68k_valid_ea (char code, int val)
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{
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int mode, mask;
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#define M(n0,n1,n2,n3,n4,n5,n6,n70,n71,n72,n73,n74) \
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(n0 | n1 << 1 | n2 << 2 | n3 << 3 | n4 << 4 | n5 << 5 | n6 << 6 \
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| n70 << 7 | n71 << 8 | n72 << 9 | n73 << 10 | n74 << 11)
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switch (code)
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{
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case '*':
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mask = M (1,1,1,1,1,1,1,1,1,1,1,1);
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break;
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case '~':
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mask = M (0,0,1,1,1,1,1,1,1,0,0,0);
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break;
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case '%':
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mask = M (1,1,1,1,1,1,1,1,1,0,0,0);
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break;
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case ';':
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mask = M (1,0,1,1,1,1,1,1,1,1,1,1);
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break;
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case '@':
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mask = M (1,0,1,1,1,1,1,1,1,1,1,0);
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break;
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case '!':
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mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
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break;
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case '&':
|
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mask = M (0,0,1,0,0,1,1,1,1,0,0,0);
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break;
|
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case '$':
|
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mask = M (1,0,1,1,1,1,1,1,1,0,0,0);
|
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break;
|
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case '?':
|
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mask = M (1,0,1,0,0,1,1,1,1,0,0,0);
|
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break;
|
||
case '/':
|
||
mask = M (1,0,1,0,0,1,1,1,1,1,1,0);
|
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break;
|
||
case '|':
|
||
mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
|
||
break;
|
||
case '>':
|
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mask = M (0,0,1,0,1,1,1,1,1,0,0,0);
|
||
break;
|
||
case '<':
|
||
mask = M (0,0,1,1,0,1,1,1,1,1,1,0);
|
||
break;
|
||
case 'm':
|
||
mask = M (1,1,1,1,1,0,0,0,0,0,0,0);
|
||
break;
|
||
case 'n':
|
||
mask = M (0,0,0,0,0,1,0,0,0,1,0,0);
|
||
break;
|
||
case 'o':
|
||
mask = M (0,0,0,0,0,0,1,1,1,0,1,1);
|
||
break;
|
||
case 'p':
|
||
mask = M (1,1,1,1,1,1,0,0,0,0,0,0);
|
||
break;
|
||
case 'q':
|
||
mask = M (1,0,1,1,1,1,0,0,0,0,0,0);
|
||
break;
|
||
case 'v':
|
||
mask = M (1,0,1,1,1,1,0,1,1,0,0,0);
|
||
break;
|
||
case 'b':
|
||
mask = M (1,0,1,1,1,1,0,0,0,1,0,0);
|
||
break;
|
||
case 'w':
|
||
mask = M (0,0,1,1,1,1,0,0,0,1,0,0);
|
||
break;
|
||
case 'y':
|
||
mask = M (0,0,1,0,0,1,0,0,0,0,0,0);
|
||
break;
|
||
case 'z':
|
||
mask = M (0,0,1,0,0,1,0,0,0,1,0,0);
|
||
break;
|
||
case '4':
|
||
mask = M (0,0,1,1,1,1,0,0,0,0,0,0);
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
#undef M
|
||
|
||
mode = (val >> 3) & 7;
|
||
if (mode == 7)
|
||
mode += val & 7;
|
||
return (mask & (1 << mode)) != 0;
|
||
}
|
||
|
||
/* Print a base register REGNO and displacement DISP, on INFO->STREAM.
|
||
REGNO = -1 for pc, -2 for none (suppressed). */
|
||
|
||
static void
|
||
print_base (int regno, bfd_vma disp, disassemble_info *info)
|
||
{
|
||
if (regno == -1)
|
||
{
|
||
(*info->fprintf_func) (info->stream, "%%pc@(");
|
||
(*info->print_address_func) (disp, info);
|
||
}
|
||
else
|
||
{
|
||
char buf[50];
|
||
|
||
if (regno == -2)
|
||
(*info->fprintf_func) (info->stream, "@(");
|
||
else if (regno == -3)
|
||
(*info->fprintf_func) (info->stream, "%%zpc@(");
|
||
else
|
||
(*info->fprintf_func) (info->stream, "%s@(", reg_names[regno]);
|
||
|
||
sprintf_vma (buf, disp);
|
||
(*info->fprintf_func) (info->stream, "%s", buf);
|
||
}
|
||
}
|
||
|
||
/* Print an indexed argument. The base register is BASEREG (-1 for pc).
|
||
P points to extension word, in buffer.
|
||
ADDR is the nominal core address of that extension word.
|
||
Returns NULL upon error. */
|
||
|
||
static unsigned char *
|
||
print_indexed (int basereg,
|
||
unsigned char *p,
|
||
bfd_vma addr,
|
||
disassemble_info *info)
|
||
{
|
||
int word;
|
||
static char *const scales[] = { "", ":2", ":4", ":8" };
|
||
bfd_vma base_disp;
|
||
bfd_vma outer_disp;
|
||
char buf[40];
|
||
char vmabuf[50];
|
||
|
||
NEXTWORD (p, word, NULL);
|
||
|
||
/* Generate the text for the index register.
|
||
Where this will be output is not yet determined. */
|
||
sprintf (buf, "%s:%c%s",
|
||
reg_names[(word >> 12) & 0xf],
|
||
(word & 0x800) ? 'l' : 'w',
|
||
scales[(word >> 9) & 3]);
|
||
|
||
/* Handle the 68000 style of indexing. */
|
||
|
||
if ((word & 0x100) == 0)
|
||
{
|
||
base_disp = word & 0xff;
|
||
if ((base_disp & 0x80) != 0)
|
||
base_disp -= 0x100;
|
||
if (basereg == -1)
|
||
base_disp += addr;
|
||
print_base (basereg, base_disp, info);
|
||
(*info->fprintf_func) (info->stream, ",%s)", buf);
|
||
return p;
|
||
}
|
||
|
||
/* Handle the generalized kind. */
|
||
/* First, compute the displacement to add to the base register. */
|
||
if (word & 0200)
|
||
{
|
||
if (basereg == -1)
|
||
basereg = -3;
|
||
else
|
||
basereg = -2;
|
||
}
|
||
if (word & 0100)
|
||
buf[0] = '\0';
|
||
base_disp = 0;
|
||
switch ((word >> 4) & 3)
|
||
{
|
||
case 2:
|
||
NEXTWORD (p, base_disp, NULL);
|
||
break;
|
||
case 3:
|
||
NEXTLONG (p, base_disp, NULL);
|
||
}
|
||
if (basereg == -1)
|
||
base_disp += addr;
|
||
|
||
/* Handle single-level case (not indirect). */
|
||
if ((word & 7) == 0)
|
||
{
|
||
print_base (basereg, base_disp, info);
|
||
if (buf[0] != '\0')
|
||
(*info->fprintf_func) (info->stream, ",%s", buf);
|
||
(*info->fprintf_func) (info->stream, ")");
|
||
return p;
|
||
}
|
||
|
||
/* Two level. Compute displacement to add after indirection. */
|
||
outer_disp = 0;
|
||
switch (word & 3)
|
||
{
|
||
case 2:
|
||
NEXTWORD (p, outer_disp, NULL);
|
||
break;
|
||
case 3:
|
||
NEXTLONG (p, outer_disp, NULL);
|
||
}
|
||
|
||
print_base (basereg, base_disp, info);
|
||
if ((word & 4) == 0 && buf[0] != '\0')
|
||
{
|
||
(*info->fprintf_func) (info->stream, ",%s", buf);
|
||
buf[0] = '\0';
|
||
}
|
||
sprintf_vma (vmabuf, outer_disp);
|
||
(*info->fprintf_func) (info->stream, ")@(%s", vmabuf);
|
||
if (buf[0] != '\0')
|
||
(*info->fprintf_func) (info->stream, ",%s", buf);
|
||
(*info->fprintf_func) (info->stream, ")");
|
||
|
||
return p;
|
||
}
|
||
|
||
#define FETCH_ARG(size, val) \
|
||
do \
|
||
{ \
|
||
val = fetch_arg (buffer, place, size, info); \
|
||
if (val < 0) \
|
||
return -3; \
|
||
} \
|
||
while (0)
|
||
|
||
/* Returns number of bytes "eaten" by the operand, or
|
||
return -1 if an invalid operand was found, or -2 if
|
||
an opcode tabe error was found or -3 to simply abort.
|
||
ADDR is the pc for this arg to be relative to. */
|
||
|
||
static int
|
||
print_insn_arg (const char *d,
|
||
unsigned char *buffer,
|
||
unsigned char *p0,
|
||
bfd_vma addr,
|
||
disassemble_info *info)
|
||
{
|
||
int val = 0;
|
||
int place = d[1];
|
||
unsigned char *p = p0;
|
||
int regno;
|
||
const char *regname;
|
||
unsigned char *p1;
|
||
double flval;
|
||
int flt_p;
|
||
bfd_signed_vma disp;
|
||
unsigned int uval;
|
||
|
||
switch (*d)
|
||
{
|
||
case 'c': /* Cache identifier. */
|
||
{
|
||
static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
|
||
FETCH_ARG (2, val);
|
||
(*info->fprintf_func) (info->stream, "%s", cacheFieldName[val]);
|
||
break;
|
||
}
|
||
|
||
case 'a': /* Address register indirect only. Cf. case '+'. */
|
||
{
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s@", reg_names[val + 8]);
|
||
break;
|
||
}
|
||
|
||
case '_': /* 32-bit absolute address for move16. */
|
||
{
|
||
NEXTULONG (p, uval);
|
||
(*info->print_address_func) (uval, info);
|
||
break;
|
||
}
|
||
|
||
case 'C':
|
||
(*info->fprintf_func) (info->stream, "%%ccr");
|
||
break;
|
||
|
||
case 'S':
|
||
(*info->fprintf_func) (info->stream, "%%sr");
|
||
break;
|
||
|
||
case 'U':
|
||
(*info->fprintf_func) (info->stream, "%%usp");
|
||
break;
|
||
|
||
case 'E':
|
||
(*info->fprintf_func) (info->stream, "%%acc");
|
||
break;
|
||
|
||
case 'G':
|
||
(*info->fprintf_func) (info->stream, "%%macsr");
|
||
break;
|
||
|
||
case 'H':
|
||
(*info->fprintf_func) (info->stream, "%%mask");
|
||
break;
|
||
|
||
case 'J':
|
||
{
|
||
/* FIXME: There's a problem here, different m68k processors call the
|
||
same address different names. The tables below try to get it right
|
||
using info->mach, but only for v4e. */
|
||
struct regname { char * name; int value; };
|
||
static const struct regname names[] =
|
||
{
|
||
{"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
|
||
{"%tc", 0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
|
||
{"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
|
||
{"%rgpiobar", 0x009}, {"%acr4",0x00c},
|
||
{"%acr5",0x00d}, {"%acr6",0x00e}, {"%acr7", 0x00f},
|
||
{"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
|
||
{"%msp", 0x803}, {"%isp", 0x804},
|
||
{"%pc", 0x80f},
|
||
/* Reg c04 is sometimes called flashbar or rambar.
|
||
Reg c05 is also sometimes called rambar. */
|
||
{"%rambar0", 0xc04}, {"%rambar1", 0xc05},
|
||
|
||
/* reg c0e is sometimes called mbar2 or secmbar.
|
||
reg c0f is sometimes called mbar. */
|
||
{"%mbar0", 0xc0e}, {"%mbar1", 0xc0f},
|
||
|
||
/* Should we be calling this psr like we do in case 'Y'? */
|
||
{"%mmusr",0x805},
|
||
|
||
{"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
|
||
|
||
/* Fido added these. */
|
||
{"%cac", 0xffe}, {"%mbo", 0xfff}
|
||
};
|
||
/* Alternate names for v4e (MCF5407/5445x/MCF547x/MCF548x), at least. */
|
||
static const struct regname names_v4e[] =
|
||
{
|
||
{"%asid",0x003}, {"%acr0",0x004}, {"%acr1",0x005},
|
||
{"%acr2",0x006}, {"%acr3",0x007}, {"%mmubar",0x008},
|
||
};
|
||
unsigned int arch_mask;
|
||
|
||
arch_mask = bfd_m68k_mach_to_features (info->mach);
|
||
FETCH_ARG (12, val);
|
||
if (arch_mask & (mcfisa_b | mcfisa_c))
|
||
{
|
||
for (regno = ARRAY_SIZE (names_v4e); --regno >= 0;)
|
||
if (names_v4e[regno].value == val)
|
||
{
|
||
(*info->fprintf_func) (info->stream, "%s", names_v4e[regno].name);
|
||
break;
|
||
}
|
||
if (regno >= 0)
|
||
break;
|
||
}
|
||
for (regno = ARRAY_SIZE (names) - 1; regno >= 0; regno--)
|
||
if (names[regno].value == val)
|
||
{
|
||
(*info->fprintf_func) (info->stream, "%s", names[regno].name);
|
||
break;
|
||
}
|
||
if (regno < 0)
|
||
(*info->fprintf_func) (info->stream, "0x%x", val);
|
||
}
|
||
break;
|
||
|
||
case 'Q':
|
||
FETCH_ARG (3, val);
|
||
/* 0 means 8, except for the bkpt instruction... */
|
||
if (val == 0 && d[1] != 's')
|
||
val = 8;
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
case 'x':
|
||
FETCH_ARG (3, val);
|
||
/* 0 means -1. */
|
||
if (val == 0)
|
||
val = -1;
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
case 'j':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "#%d", val+1);
|
||
break;
|
||
|
||
case 'K':
|
||
FETCH_ARG (9, val);
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
case 'M':
|
||
if (place == 'h')
|
||
{
|
||
static char *const scalefactor_name[] = { "<<", ">>" };
|
||
|
||
FETCH_ARG (1, val);
|
||
(*info->fprintf_func) (info->stream, "%s", scalefactor_name[val]);
|
||
}
|
||
else
|
||
{
|
||
FETCH_ARG (8, val);
|
||
if (val & 0x80)
|
||
val = val - 0x100;
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
}
|
||
break;
|
||
|
||
case 'T':
|
||
FETCH_ARG (4, val);
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
case 'D':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[val]);
|
||
break;
|
||
|
||
case 'A':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[val + 010]);
|
||
break;
|
||
|
||
case 'R':
|
||
FETCH_ARG (4, val);
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[val]);
|
||
break;
|
||
|
||
case 'r':
|
||
FETCH_ARG (4, regno);
|
||
if (regno > 7)
|
||
(*info->fprintf_func) (info->stream, "%s@", reg_names[regno]);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "@(%s)", reg_names[regno]);
|
||
break;
|
||
|
||
case 'F':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%%fp%d", val);
|
||
break;
|
||
|
||
case 'O':
|
||
FETCH_ARG (6, val);
|
||
if (val & 0x20)
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[val & 7]);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "%d", val);
|
||
break;
|
||
|
||
case '+':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s@+", reg_names[val + 8]);
|
||
break;
|
||
|
||
case '-':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s@-", reg_names[val + 8]);
|
||
break;
|
||
|
||
case 'k':
|
||
if (place == 'k')
|
||
{
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "{%s}", reg_names[val]);
|
||
}
|
||
else if (place == 'C')
|
||
{
|
||
FETCH_ARG (7, val);
|
||
if (val > 63) /* This is a signed constant. */
|
||
val -= 128;
|
||
(*info->fprintf_func) (info->stream, "{#%d}", val);
|
||
}
|
||
else
|
||
return -1;
|
||
break;
|
||
|
||
case '#':
|
||
case '^':
|
||
p1 = buffer + (*d == '#' ? 2 : 4);
|
||
if (place == 's')
|
||
FETCH_ARG (4, val);
|
||
else if (place == 'C')
|
||
FETCH_ARG (7, val);
|
||
else if (place == '8')
|
||
FETCH_ARG (3, val);
|
||
else if (place == '3')
|
||
FETCH_ARG (8, val);
|
||
else if (place == 'b')
|
||
NEXTBYTE (p1, val);
|
||
else if (place == 'w' || place == 'W')
|
||
NEXTWORD (p1, val, -3);
|
||
else if (place == 'l')
|
||
NEXTLONG (p1, val, -3);
|
||
else
|
||
return -2;
|
||
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
case 'B':
|
||
if (place == 'b')
|
||
NEXTBYTE (p, disp);
|
||
else if (place == 'B')
|
||
disp = COERCE_SIGNED_CHAR (buffer[1]);
|
||
else if (place == 'w' || place == 'W')
|
||
NEXTWORD (p, disp, -3);
|
||
else if (place == 'l' || place == 'L' || place == 'C')
|
||
NEXTLONG (p, disp, -3);
|
||
else if (place == 'g')
|
||
{
|
||
NEXTBYTE (buffer, disp);
|
||
if (disp == 0)
|
||
NEXTWORD (p, disp, -3);
|
||
else if (disp == -1)
|
||
NEXTLONG (p, disp, -3);
|
||
}
|
||
else if (place == 'c')
|
||
{
|
||
if (buffer[1] & 0x40) /* If bit six is one, long offset. */
|
||
NEXTLONG (p, disp, -3);
|
||
else
|
||
NEXTWORD (p, disp, -3);
|
||
}
|
||
else
|
||
return -2;
|
||
|
||
(*info->print_address_func) (addr + disp, info);
|
||
break;
|
||
|
||
case 'd':
|
||
{
|
||
int val1;
|
||
|
||
NEXTWORD (p, val, -3);
|
||
FETCH_ARG (3, val1);
|
||
(*info->fprintf_func) (info->stream, "%s@(%d)", reg_names[val1 + 8], val);
|
||
break;
|
||
}
|
||
|
||
case 's':
|
||
FETCH_ARG (3, val);
|
||
(*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
|
||
break;
|
||
|
||
case 'e':
|
||
FETCH_ARG (2, val);
|
||
(*info->fprintf_func) (info->stream, "%%acc%d", val);
|
||
break;
|
||
|
||
case 'g':
|
||
FETCH_ARG (1, val);
|
||
(*info->fprintf_func) (info->stream, "%%accext%s", val == 0 ? "01" : "23");
|
||
break;
|
||
|
||
case 'i':
|
||
FETCH_ARG (2, val);
|
||
if (val == 1)
|
||
(*info->fprintf_func) (info->stream, "<<");
|
||
else if (val == 3)
|
||
(*info->fprintf_func) (info->stream, ">>");
|
||
else
|
||
return -1;
|
||
break;
|
||
|
||
case 'I':
|
||
/* Get coprocessor ID... */
|
||
val = fetch_arg (buffer, 'd', 3, info);
|
||
if (val < 0)
|
||
return -3;
|
||
if (val != 1) /* Unusual coprocessor ID? */
|
||
(*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
|
||
break;
|
||
|
||
case '4':
|
||
case '*':
|
||
case '~':
|
||
case '%':
|
||
case ';':
|
||
case '@':
|
||
case '!':
|
||
case '$':
|
||
case '?':
|
||
case '/':
|
||
case '&':
|
||
case '|':
|
||
case '<':
|
||
case '>':
|
||
case 'm':
|
||
case 'n':
|
||
case 'o':
|
||
case 'p':
|
||
case 'q':
|
||
case 'v':
|
||
case 'b':
|
||
case 'w':
|
||
case 'y':
|
||
case 'z':
|
||
if (place == 'd')
|
||
{
|
||
val = fetch_arg (buffer, 'x', 6, info);
|
||
if (val < 0)
|
||
return -3;
|
||
val = ((val & 7) << 3) + ((val >> 3) & 7);
|
||
}
|
||
else
|
||
{
|
||
val = fetch_arg (buffer, 's', 6, info);
|
||
if (val < 0)
|
||
return -3;
|
||
}
|
||
|
||
/* If the <ea> is invalid for *d, then reject this match. */
|
||
if (!m68k_valid_ea (*d, val))
|
||
return -1;
|
||
|
||
/* Get register number assuming address register. */
|
||
regno = (val & 7) + 8;
|
||
regname = reg_names[regno];
|
||
switch (val >> 3)
|
||
{
|
||
case 0:
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[val]);
|
||
break;
|
||
|
||
case 1:
|
||
(*info->fprintf_func) (info->stream, "%s", regname);
|
||
break;
|
||
|
||
case 2:
|
||
(*info->fprintf_func) (info->stream, "%s@", regname);
|
||
break;
|
||
|
||
case 3:
|
||
(*info->fprintf_func) (info->stream, "%s@+", regname);
|
||
break;
|
||
|
||
case 4:
|
||
(*info->fprintf_func) (info->stream, "%s@-", regname);
|
||
break;
|
||
|
||
case 5:
|
||
NEXTWORD (p, val, -3);
|
||
(*info->fprintf_func) (info->stream, "%s@(%d)", regname, val);
|
||
break;
|
||
|
||
case 6:
|
||
p = print_indexed (regno, p, addr, info);
|
||
if (p == NULL)
|
||
return -3;
|
||
break;
|
||
|
||
case 7:
|
||
switch (val & 7)
|
||
{
|
||
case 0:
|
||
NEXTWORD (p, val, -3);
|
||
(*info->print_address_func) (val, info);
|
||
break;
|
||
|
||
case 1:
|
||
NEXTULONG (p, uval);
|
||
(*info->print_address_func) (uval, info);
|
||
break;
|
||
|
||
case 2:
|
||
NEXTWORD (p, val, -3);
|
||
(*info->fprintf_func) (info->stream, "%%pc@(");
|
||
(*info->print_address_func) (addr + val, info);
|
||
(*info->fprintf_func) (info->stream, ")");
|
||
break;
|
||
|
||
case 3:
|
||
p = print_indexed (-1, p, addr, info);
|
||
if (p == NULL)
|
||
return -3;
|
||
break;
|
||
|
||
case 4:
|
||
flt_p = 1; /* Assume it's a float... */
|
||
switch (place)
|
||
{
|
||
case 'b':
|
||
NEXTBYTE (p, val);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'w':
|
||
NEXTWORD (p, val, -3);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'l':
|
||
NEXTLONG (p, val, -3);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'f':
|
||
NEXTSINGLE (flval, p);
|
||
break;
|
||
|
||
case 'F':
|
||
NEXTDOUBLE (flval, p);
|
||
break;
|
||
|
||
case 'x':
|
||
NEXTEXTEND (flval, p);
|
||
break;
|
||
|
||
case 'p':
|
||
NEXTPACKED (p, flval);
|
||
break;
|
||
|
||
default:
|
||
return -1;
|
||
}
|
||
if (flt_p) /* Print a float? */
|
||
(*info->fprintf_func) (info->stream, "#0e%g", flval);
|
||
else
|
||
(*info->fprintf_func) (info->stream, "#%d", val);
|
||
break;
|
||
|
||
default:
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
/* If place is '/', then this is the case of the mask bit for
|
||
mac/emac loads. Now that the arg has been printed, grab the
|
||
mask bit and if set, add a '&' to the arg. */
|
||
if (place == '/')
|
||
{
|
||
FETCH_ARG (1, val);
|
||
if (val)
|
||
info->fprintf_func (info->stream, "&");
|
||
}
|
||
break;
|
||
|
||
case 'L':
|
||
case 'l':
|
||
if (place == 'w')
|
||
{
|
||
char doneany;
|
||
p1 = buffer + 2;
|
||
NEXTWORD (p1, val, -3);
|
||
/* Move the pointer ahead if this point is farther ahead
|
||
than the last. */
|
||
p = p1 > p ? p1 : p;
|
||
if (val == 0)
|
||
{
|
||
(*info->fprintf_func) (info->stream, "#0");
|
||
break;
|
||
}
|
||
if (*d == 'l')
|
||
{
|
||
int newval = 0;
|
||
|
||
for (regno = 0; regno < 16; ++regno)
|
||
if (val & (0x8000 >> regno))
|
||
newval |= 1 << regno;
|
||
val = newval;
|
||
}
|
||
val &= 0xffff;
|
||
doneany = 0;
|
||
for (regno = 0; regno < 16; ++regno)
|
||
if (val & (1 << regno))
|
||
{
|
||
int first_regno;
|
||
|
||
if (doneany)
|
||
(*info->fprintf_func) (info->stream, "/");
|
||
doneany = 1;
|
||
(*info->fprintf_func) (info->stream, "%s", reg_names[regno]);
|
||
first_regno = regno;
|
||
while (val & (1 << (regno + 1)))
|
||
++regno;
|
||
if (regno > first_regno)
|
||
(*info->fprintf_func) (info->stream, "-%s",
|
||
reg_names[regno]);
|
||
}
|
||
}
|
||
else if (place == '3')
|
||
{
|
||
/* `fmovem' insn. */
|
||
char doneany;
|
||
|
||
FETCH_ARG (8, val);
|
||
if (val == 0)
|
||
{
|
||
(*info->fprintf_func) (info->stream, "#0");
|
||
break;
|
||
}
|
||
if (*d == 'l')
|
||
{
|
||
int newval = 0;
|
||
|
||
for (regno = 0; regno < 8; ++regno)
|
||
if (val & (0x80 >> regno))
|
||
newval |= 1 << regno;
|
||
val = newval;
|
||
}
|
||
val &= 0xff;
|
||
doneany = 0;
|
||
for (regno = 0; regno < 8; ++regno)
|
||
if (val & (1 << regno))
|
||
{
|
||
int first_regno;
|
||
if (doneany)
|
||
(*info->fprintf_func) (info->stream, "/");
|
||
doneany = 1;
|
||
(*info->fprintf_func) (info->stream, "%%fp%d", regno);
|
||
first_regno = regno;
|
||
while (val & (1 << (regno + 1)))
|
||
++regno;
|
||
if (regno > first_regno)
|
||
(*info->fprintf_func) (info->stream, "-%%fp%d", regno);
|
||
}
|
||
}
|
||
else if (place == '8')
|
||
{
|
||
FETCH_ARG (3, val);
|
||
/* fmoveml for FP status registers. */
|
||
(*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
|
||
}
|
||
else
|
||
return -2;
|
||
break;
|
||
|
||
case 'X':
|
||
place = '8';
|
||
case 'Y':
|
||
case 'Z':
|
||
case 'W':
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
{
|
||
char *name = 0;
|
||
|
||
FETCH_ARG (5, val);
|
||
switch (val)
|
||
{
|
||
case 2: name = "%tt0"; break;
|
||
case 3: name = "%tt1"; break;
|
||
case 0x10: name = "%tc"; break;
|
||
case 0x11: name = "%drp"; break;
|
||
case 0x12: name = "%srp"; break;
|
||
case 0x13: name = "%crp"; break;
|
||
case 0x14: name = "%cal"; break;
|
||
case 0x15: name = "%val"; break;
|
||
case 0x16: name = "%scc"; break;
|
||
case 0x17: name = "%ac"; break;
|
||
case 0x18: name = "%psr"; break;
|
||
case 0x19: name = "%pcsr"; break;
|
||
case 0x1c:
|
||
case 0x1d:
|
||
{
|
||
int break_reg = ((buffer[3] >> 2) & 7);
|
||
|
||
(*info->fprintf_func)
|
||
(info->stream, val == 0x1c ? "%%bad%d" : "%%bac%d",
|
||
break_reg);
|
||
}
|
||
break;
|
||
default:
|
||
(*info->fprintf_func) (info->stream, "<mmu register %d>", val);
|
||
}
|
||
if (name)
|
||
(*info->fprintf_func) (info->stream, "%s", name);
|
||
}
|
||
break;
|
||
|
||
case 'f':
|
||
{
|
||
int fc;
|
||
|
||
FETCH_ARG (5, fc);
|
||
if (fc == 1)
|
||
(*info->fprintf_func) (info->stream, "%%dfc");
|
||
else if (fc == 0)
|
||
(*info->fprintf_func) (info->stream, "%%sfc");
|
||
else
|
||
/* xgettext:c-format */
|
||
(*info->fprintf_func) (info->stream, _("<function code %d>"), fc);
|
||
}
|
||
break;
|
||
|
||
case 'V':
|
||
(*info->fprintf_func) (info->stream, "%%val");
|
||
break;
|
||
|
||
case 't':
|
||
{
|
||
int level;
|
||
|
||
FETCH_ARG (3, level);
|
||
(*info->fprintf_func) (info->stream, "%d", level);
|
||
}
|
||
break;
|
||
|
||
case 'u':
|
||
{
|
||
short is_upper = 0;
|
||
int reg;
|
||
|
||
FETCH_ARG (5, reg);
|
||
if (reg & 0x10)
|
||
{
|
||
is_upper = 1;
|
||
reg &= 0xf;
|
||
}
|
||
(*info->fprintf_func) (info->stream, "%s%s",
|
||
reg_half_names[reg],
|
||
is_upper ? "u" : "l");
|
||
}
|
||
break;
|
||
|
||
default:
|
||
return -2;
|
||
}
|
||
|
||
return p - p0;
|
||
}
|
||
|
||
/* Try to match the current instruction to best and if so, return the
|
||
number of bytes consumed from the instruction stream, else zero. */
|
||
|
||
static int
|
||
match_insn_m68k (bfd_vma memaddr,
|
||
disassemble_info * info,
|
||
const struct m68k_opcode * best)
|
||
{
|
||
unsigned char *save_p;
|
||
unsigned char *p;
|
||
const char *d;
|
||
const char *args = best->args;
|
||
|
||
struct private *priv = (struct private *) info->private_data;
|
||
bfd_byte *buffer = priv->the_buffer;
|
||
fprintf_ftype save_printer = info->fprintf_func;
|
||
void (* save_print_address) (bfd_vma, struct disassemble_info *)
|
||
= info->print_address_func;
|
||
|
||
if (*args == '.')
|
||
args++;
|
||
|
||
/* Point at first word of argument data,
|
||
and at descriptor for first argument. */
|
||
p = buffer + 2;
|
||
|
||
/* Figure out how long the fixed-size portion of the instruction is.
|
||
The only place this is stored in the opcode table is
|
||
in the arguments--look for arguments which specify fields in the 2nd
|
||
or 3rd words of the instruction. */
|
||
for (d = args; *d; d += 2)
|
||
{
|
||
/* I don't think it is necessary to be checking d[0] here;
|
||
I suspect all this could be moved to the case statement below. */
|
||
if (d[0] == '#')
|
||
{
|
||
if (d[1] == 'l' && p - buffer < 6)
|
||
p = buffer + 6;
|
||
else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8')
|
||
p = buffer + 4;
|
||
}
|
||
|
||
if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
|
||
p = buffer + 4;
|
||
|
||
switch (d[1])
|
||
{
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case 'i':
|
||
if (p - buffer < 4)
|
||
p = buffer + 4;
|
||
break;
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
if (p - buffer < 6)
|
||
p = buffer + 6;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* pflusha is an exceptions. It takes no arguments but is two words
|
||
long. Recognize it by looking at the lower 16 bits of the mask. */
|
||
if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
|
||
p = buffer + 4;
|
||
|
||
/* lpstop is another exception. It takes a one word argument but is
|
||
three words long. */
|
||
if (p - buffer < 6
|
||
&& (best->match & 0xffff) == 0xffff
|
||
&& args[0] == '#'
|
||
&& args[1] == 'w')
|
||
{
|
||
/* Copy the one word argument into the usual location for a one
|
||
word argument, to simplify printing it. We can get away with
|
||
this because we know exactly what the second word is, and we
|
||
aren't going to print anything based on it. */
|
||
p = buffer + 6;
|
||
FETCH_DATA (info, p);
|
||
buffer[2] = buffer[4];
|
||
buffer[3] = buffer[5];
|
||
}
|
||
|
||
FETCH_DATA (info, p);
|
||
|
||
save_p = p;
|
||
info->print_address_func = dummy_print_address;
|
||
info->fprintf_func = (fprintf_ftype) dummy_printer;
|
||
|
||
/* We scan the operands twice. The first time we don't print anything,
|
||
but look for errors. */
|
||
for (d = args; *d; d += 2)
|
||
{
|
||
int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
|
||
|
||
if (eaten >= 0)
|
||
p += eaten;
|
||
else if (eaten == -1 || eaten == -3)
|
||
{
|
||
info->fprintf_func = save_printer;
|
||
info->print_address_func = save_print_address;
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
/* We must restore the print functions before trying to print the
|
||
error message. */
|
||
info->fprintf_func = save_printer;
|
||
info->print_address_func = save_print_address;
|
||
info->fprintf_func (info->stream,
|
||
/* xgettext:c-format */
|
||
_("<internal error in opcode table: %s %s>\n"),
|
||
best->name, best->args);
|
||
return 2;
|
||
}
|
||
}
|
||
|
||
p = save_p;
|
||
info->fprintf_func = save_printer;
|
||
info->print_address_func = save_print_address;
|
||
|
||
d = args;
|
||
|
||
info->fprintf_func (info->stream, "%s", best->name);
|
||
|
||
if (*d)
|
||
info->fprintf_func (info->stream, " ");
|
||
|
||
while (*d)
|
||
{
|
||
p += print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
|
||
d += 2;
|
||
|
||
if (*d && *(d - 2) != 'I' && *d != 'k')
|
||
info->fprintf_func (info->stream, ",");
|
||
}
|
||
|
||
return p - buffer;
|
||
}
|
||
|
||
/* Try to interpret the instruction at address MEMADDR as one that
|
||
can execute on a processor with the features given by ARCH_MASK.
|
||
If successful, print the instruction to INFO->STREAM and return
|
||
its length in bytes. Return 0 otherwise. */
|
||
|
||
static int
|
||
m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
|
||
unsigned int arch_mask)
|
||
{
|
||
int i;
|
||
const char *d;
|
||
static const struct m68k_opcode **opcodes[16];
|
||
static int numopcodes[16];
|
||
int val;
|
||
int major_opcode;
|
||
|
||
struct private *priv = (struct private *) info->private_data;
|
||
bfd_byte *buffer = priv->the_buffer;
|
||
|
||
if (!opcodes[0])
|
||
{
|
||
/* Speed up the matching by sorting the opcode
|
||
table on the upper four bits of the opcode. */
|
||
const struct m68k_opcode **opc_pointer[16];
|
||
|
||
/* First count how many opcodes are in each of the sixteen buckets. */
|
||
for (i = 0; i < m68k_numopcodes; i++)
|
||
numopcodes[(m68k_opcodes[i].opcode >> 28) & 15]++;
|
||
|
||
/* Then create a sorted table of pointers
|
||
that point into the unsorted table. */
|
||
opc_pointer[0] = xmalloc (sizeof (struct m68k_opcode *)
|
||
* m68k_numopcodes);
|
||
opcodes[0] = opc_pointer[0];
|
||
|
||
for (i = 1; i < 16; i++)
|
||
{
|
||
opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
|
||
opcodes[i] = opc_pointer[i];
|
||
}
|
||
|
||
for (i = 0; i < m68k_numopcodes; i++)
|
||
*opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
|
||
}
|
||
|
||
FETCH_DATA (info, buffer + 2);
|
||
major_opcode = (buffer[0] >> 4) & 15;
|
||
|
||
for (i = 0; i < numopcodes[major_opcode]; i++)
|
||
{
|
||
const struct m68k_opcode *opc = opcodes[major_opcode][i];
|
||
unsigned long opcode = opc->opcode;
|
||
unsigned long match = opc->match;
|
||
const char *args = opc->args;
|
||
|
||
if (*args == '.')
|
||
args++;
|
||
|
||
if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24)))
|
||
&& ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16)))
|
||
/* Only fetch the next two bytes if we need to. */
|
||
&& (((0xffff & match) == 0)
|
||
||
|
||
(FETCH_DATA (info, buffer + 4)
|
||
&& ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
|
||
&& ((0xff & buffer[3] & match) == (0xff & opcode)))
|
||
)
|
||
&& (opc->arch & arch_mask) != 0)
|
||
{
|
||
/* Don't use for printout the variants of divul and divsl
|
||
that have the same register number in two places.
|
||
The more general variants will match instead. */
|
||
for (d = args; *d; d += 2)
|
||
if (d[1] == 'D')
|
||
break;
|
||
|
||
/* Don't use for printout the variants of most floating
|
||
point coprocessor instructions which use the same
|
||
register number in two places, as above. */
|
||
if (*d == '\0')
|
||
for (d = args; *d; d += 2)
|
||
if (d[1] == 't')
|
||
break;
|
||
|
||
/* Don't match fmovel with more than one register;
|
||
wait for fmoveml. */
|
||
if (*d == '\0')
|
||
{
|
||
for (d = args; *d; d += 2)
|
||
{
|
||
if (d[0] == 's' && d[1] == '8')
|
||
{
|
||
val = fetch_arg (buffer, d[1], 3, info);
|
||
if (val < 0)
|
||
return 0;
|
||
if ((val & (val - 1)) != 0)
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Don't match FPU insns with non-default coprocessor ID. */
|
||
if (*d == '\0')
|
||
{
|
||
for (d = args; *d; d += 2)
|
||
{
|
||
if (d[0] == 'I')
|
||
{
|
||
val = fetch_arg (buffer, 'd', 3, info);
|
||
if (val != 1)
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (*d == '\0')
|
||
if ((val = match_insn_m68k (memaddr, info, opc)))
|
||
return val;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Print the m68k instruction at address MEMADDR in debugged memory,
|
||
on INFO->STREAM. Returns length of the instruction, in bytes. */
|
||
|
||
int
|
||
print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
|
||
{
|
||
unsigned int arch_mask;
|
||
struct private priv;
|
||
int val;
|
||
|
||
bfd_byte *buffer = priv.the_buffer;
|
||
|
||
info->private_data = & priv;
|
||
/* Tell objdump to use two bytes per chunk
|
||
and six bytes per line for displaying raw data. */
|
||
info->bytes_per_chunk = 2;
|
||
info->bytes_per_line = 6;
|
||
info->display_endian = BFD_ENDIAN_BIG;
|
||
priv.max_fetched = priv.the_buffer;
|
||
priv.insn_start = memaddr;
|
||
|
||
arch_mask = bfd_m68k_mach_to_features (info->mach);
|
||
if (!arch_mask)
|
||
{
|
||
/* First try printing an m680x0 instruction. Try printing a Coldfire
|
||
one if that fails. */
|
||
val = m68k_scan_mask (memaddr, info, m68k_mask);
|
||
if (val == 0)
|
||
val = m68k_scan_mask (memaddr, info, mcf_mask);
|
||
}
|
||
else
|
||
{
|
||
val = m68k_scan_mask (memaddr, info, arch_mask);
|
||
}
|
||
|
||
if (val == 0)
|
||
/* Handle undefined instructions. */
|
||
info->fprintf_func (info->stream, ".short 0x%04x", (buffer[0] << 8) + buffer[1]);
|
||
|
||
return val ? val : 2;
|
||
}
|