1 /* Disassemble Motorolla M*Core instructions.
2 Copyright (C) 1993, 1999 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include "mcore-opc.h"
25 /* Mask for each mcore_opclass: */
26 static const unsigned short imsk
[] =
61 /* JC */ 0, /* JC,JU,JL don't appear in object */
66 /* OB2 */ 0 /* OB2 won't appear in object. */
69 static const char * grname
[] =
71 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
72 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
75 static const char X
[] = "??";
77 static const char * crname
[] =
79 "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
80 "ss2", "ss3", "ss4", "gcr", "gsr", X
, X
, X
,
81 X
, X
, X
, X
, X
, X
, X
, X
,
82 X
, X
, X
, X
, X
, X
, X
, X
85 static const unsigned isiz
[] = { 2, 0, 1, 0 };
88 print_insn_mcore (memaddr
, info
)
90 struct disassemble_info
* info
;
92 unsigned char ibytes
[4];
93 fprintf_ftype fprintf
= info
->fprintf_func
;
94 void * stream
= info
->stream
;
96 mcore_opcode_info
* op
;
99 status
= info
->read_memory_func (memaddr
, ibytes
, 2, info
);
103 info
->memory_error_func (status
, memaddr
, info
);
107 inst
= (ibytes
[0] << 8) | ibytes
[1];
109 /* Just a linear search of the table. */
110 for (op
= mcore_table
; op
->name
!= 0; op
++)
112 if (op
->inst
== (inst
& imsk
[op
->opclass
]))
117 fprintf (stream
, ".word 0x%04x", inst
);
120 const char * name
= grname
[inst
& 0x0F];
122 fprintf (stream
, "%s", op
->name
);
127 case OT
: fprintf (stream
, "\t%d", inst
& 0x3); break;
130 case JSR
: fprintf (stream
, "\t%s", name
); break;
131 case OC
: fprintf (stream
, "\t%s, %s", name
, crname
[(inst
>> 4) & 0x1F]); break;
132 case O1R1
: fprintf (stream
, "\t%s, r1", name
); break;
133 case O2
: fprintf (stream
, "\t%s, %s", name
, grname
[(inst
>> 4) & 0xF]); break;
134 case X1
: fprintf (stream
, "\tr1, %s", name
); break;
135 case OI
: fprintf (stream
, "\t%s, %d", name
, ((inst
>> 4) & 0x1F) + 1); break;
136 case RM
: fprintf (stream
, "\t%s-r15, (r0)", name
); break;
137 case RQ
: fprintf (stream
, "\tr4-r7, (%s)", name
); break;
146 case OMc
: fprintf (stream
, "\t%s, %d", name
, (inst
>> 4) & 0x1F); break;
147 case I7
: fprintf (stream
, "\t%s, %d", name
, (inst
>> 4) & 0x7F); break;
148 case LS
: fprintf (stream
, "\t%s, (%s, %d)", grname
[(inst
>> 8) & 0xF],
149 name
, ((inst
>> 4) & 0xF) << isiz
[(inst
>> 13) & 3]);
154 long val
= inst
& 0x3FF;
159 fprintf (stream
, "\t0x%x", memaddr
+ 2 + (val
<<1));
161 if (strcmp (op
->name
, "bsr") == 0)
163 /* for bsr, we'll try to get a symbol for the target */
164 val
= memaddr
+ 2 + (val
<< 1);
166 if (info
->print_address_func
&& val
!= 0)
168 fprintf (stream
, "\t// ");
169 info
->print_address_func (val
, info
);
178 val
= (inst
& 0x000F);
179 fprintf (stream
, "\t%s, 0x%x",
180 grname
[(inst
>> 4) & 0xF], memaddr
- (val
<< 1));
188 val
= (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC;
190 status
= info
->read_memory_func (val
, ibytes
, 4, info
);
193 info
->memory_error_func (status
, memaddr
, info
);
197 val
= (ibytes
[0] << 24) | (ibytes
[1] << 16)
198 | (ibytes
[2] << 8) | (ibytes
[3]);
200 /* Removed [] around literal value to match ABI syntax 12/95. */
201 fprintf (stream
, "\t%s, 0x%X", grname
[(inst
>> 8) & 0xF], val
);
204 fprintf (stream
, "\t// from address pool at 0x%x",
205 (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC);
213 val
= (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC;
215 status
= info
->read_memory_func (val
, ibytes
, 4, info
);
218 info
->memory_error_func (status
, memaddr
, info
);
222 val
= (ibytes
[0] << 24) | (ibytes
[1] << 16)
223 | (ibytes
[2] << 8) | (ibytes
[3]);
225 /* Removed [] around literal value to match ABI syntax 12/95. */
226 fprintf (stream
, "\t0x%X", val
);
227 /* For jmpi/jsri, we'll try to get a symbol for the target. */
228 if (info
->print_address_func
&& val
!= 0)
230 fprintf (stream
, "\t// ");
231 info
->print_address_func (val
, info
);
235 fprintf (stream
, "\t// from address pool at 0x%x",
236 (memaddr
+ 2 + ((inst
& 0xFF) << 2)) & 0xFFFFFFFC);
242 /* if the disassembler lags the instruction set */
243 fprintf (stream
, "\tundecoded operands, inst is 0x%04x", inst
);
248 /* Say how many bytes we consumed? */
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