1 /* Disassemble Motorola M*Core instructions.
2 Copyright 1993, 1999, 2000, 2001, 2002, 2007 Free Software Foundation, Inc.
4 This file is part of the GNU opcodes library.
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 It is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
26 #include "mcore-opc.h"
29 /* Mask for each mcore_opclass: */
30 static const unsigned short imsk
[] = {
64 /* OPSR */ 0xFFF8, /* psrset/psrclr */
66 /* JC */ 0, /* JC,JU,JL don't appear in object */
71 /* OB2 */ 0 /* OB2 won't appear in object. */
74 static const char *grname
[] = {
75 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
76 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
79 static const char X
[] = "??";
81 static const char *crname
[] = {
82 "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
83 "ss2", "ss3", "ss4", "gcr", "gsr", X
, X
, X
,
84 X
, X
, X
, X
, X
, X
, X
, X
,
85 X
, X
, X
, X
, X
, X
, X
, X
88 static const unsigned isiz
[] = { 2, 0, 1, 0 };
91 print_insn_mcore (memaddr
, info
)
93 struct disassemble_info
*info
;
95 unsigned char ibytes
[4];
96 fprintf_ftype fprintf
= info
->fprintf_func
;
97 void *stream
= info
->stream
;
99 const mcore_opcode_info
*op
;
102 info
->bytes_per_chunk
= 2;
104 status
= info
->read_memory_func (memaddr
, ibytes
, 2, info
);
108 info
->memory_error_func (status
, memaddr
, info
);
112 if (info
->endian
== BFD_ENDIAN_BIG
)
113 inst
= (ibytes
[0] << 8) | ibytes
[1];
114 else if (info
->endian
== BFD_ENDIAN_LITTLE
)
115 inst
= (ibytes
[1] << 8) | ibytes
[0];
119 /* Just a linear search of the table. */
120 for (op
= mcore_table
; op
->name
!= 0; op
++)
121 if (op
->inst
== (inst
& imsk
[op
->opclass
]))
125 (*fprintf
) (stream
, ".short 0x%04x", inst
);
128 const char *name
= grname
[inst
& 0x0F];
130 (*fprintf
) (stream
, "%s", op
->name
);
138 (*fprintf
) (stream
, "\t%d", inst
& 0x3);
144 (*fprintf
) (stream
, "\t%s", name
);
148 (*fprintf
) (stream
, "\t%s, %s", name
, crname
[(inst
>> 4) & 0x1F]);
152 (*fprintf
) (stream
, "\t%s, r1", name
);
157 (*fprintf
) (stream
, "\t%s, %s", name
, grname
[(inst
>> 4) & 0xF]);
161 (*fprintf
) (stream
, "\tr1, %s", name
);
165 (*fprintf
) (stream
, "\t%s, %d", name
, ((inst
>> 4) & 0x1F) + 1);
169 (*fprintf
) (stream
, "\t%s-r15, (r0)", name
);
173 (*fprintf
) (stream
, "\tr4-r7, (%s)", name
);
185 (*fprintf
) (stream
, "\t%s, %d", name
, (inst
>> 4) & 0x1F);
189 (*fprintf
) (stream
, "\t%s, %d", name
, (inst
>> 4) & 0x7F);
193 (*fprintf
) (stream
, "\t%s, (%s, %d)", grname
[(inst
>> 8) & 0xF],
194 name
, ((inst
>> 4) & 0xF) << isiz
[(inst
>> 13) & 3]);
199 long val
= inst
& 0x3FF;
204 (*fprintf
) (stream
, "\t0x%lx", (long)(memaddr
+ 2 + (val
<< 1)));
206 if (strcmp (op
->name
, "bsr") == 0)
208 /* For bsr, we'll try to get a symbol for the target. */
209 val
= memaddr
+ 2 + (val
<< 1);
211 if (info
->print_address_func
&& val
!= 0)
213 (*fprintf
) (stream
, "\t// ");
214 info
->print_address_func (val
, info
);
223 val
= (inst
& 0x000F);
224 (*fprintf
) (stream
, "\t%s, 0x%lx",
225 grname
[(inst
>> 4) & 0xF],
226 (long) (memaddr
- (val
<< 1)));
234 val
= (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC;
236 status
= info
->read_memory_func (val
, ibytes
, 4, info
);
239 info
->memory_error_func (status
, memaddr
, info
);
243 if (info
->endian
== BFD_ENDIAN_LITTLE
)
244 val
= (ibytes
[3] << 24) | (ibytes
[2] << 16)
245 | (ibytes
[1] << 8) | (ibytes
[0]);
247 val
= (ibytes
[0] << 24) | (ibytes
[1] << 16)
248 | (ibytes
[2] << 8) | (ibytes
[3]);
250 /* Removed [] around literal value to match ABI syntax 12/95. */
251 (*fprintf
) (stream
, "\t%s, 0x%lX", grname
[(inst
>> 8) & 0xF], val
);
254 (*fprintf
) (stream
, "\t// from address pool at 0x%lx",
256 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC);
264 val
= (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC;
266 status
= info
->read_memory_func (val
, ibytes
, 4, info
);
269 info
->memory_error_func (status
, memaddr
, info
);
273 if (info
->endian
== BFD_ENDIAN_LITTLE
)
274 val
= (ibytes
[3] << 24) | (ibytes
[2] << 16)
275 | (ibytes
[1] << 8) | (ibytes
[0]);
277 val
= (ibytes
[0] << 24) | (ibytes
[1] << 16)
278 | (ibytes
[2] << 8) | (ibytes
[3]);
280 /* Removed [] around literal value to match ABI syntax 12/95. */
281 (*fprintf
) (stream
, "\t0x%lX", val
);
282 /* For jmpi/jsri, we'll try to get a symbol for the target. */
283 if (info
->print_address_func
&& val
!= 0)
285 (*fprintf
) (stream
, "\t// ");
286 info
->print_address_func (val
, info
);
290 (*fprintf
) (stream
, "\t// from address pool at 0x%lx",
292 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC);
299 static char *fields
[] = {
300 "af", "ie", "fe", "fe,ie",
301 "ee", "ee,ie", "ee,fe", "ee,fe,ie"
304 (*fprintf
) (stream
, "\t%s", fields
[inst
& 0x7]);
309 /* If the disassembler lags the instruction set. */
310 (*fprintf
) (stream
, "\tundecoded operands, inst is 0x%04x", inst
);
315 /* Say how many bytes we consumed. */
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