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[binutils.git] / opcodes / mcore-dis.c
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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)
9 any later version.
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. */
21 #include "sysdep.h"
22 #include <stdio.h>
23 #define STATIC_TABLE
24 #define DEFINE_TABLE
26 #include "mcore-opc.h"
27 #include "dis-asm.h"
29 /* Mask for each mcore_opclass: */
30 static const unsigned short imsk[] = {
31 /* O0 */ 0xFFFF,
32 /* OT */ 0xFFFC,
33 /* O1 */ 0xFFF0,
34 /* OC */ 0xFE00,
35 /* O2 */ 0xFF00,
36 /* X1 */ 0xFFF0,
37 /* OI */ 0xFE00,
38 /* OB */ 0xFE00,
40 /* OMa */ 0xFFF0,
41 /* SI */ 0xFE00,
42 /* I7 */ 0xF800,
43 /* LS */ 0xF000,
44 /* BR */ 0xF800,
45 /* BL */ 0xFF00,
46 /* LR */ 0xF000,
47 /* LJ */ 0xFF00,
49 /* RM */ 0xFFF0,
50 /* RQ */ 0xFFF0,
51 /* JSR */ 0xFFF0,
52 /* JMP */ 0xFFF0,
53 /* OBRa*/ 0xFFF0,
54 /* OBRb*/ 0xFF80,
55 /* OBRc*/ 0xFF00,
56 /* OBR2*/ 0xFE00,
58 /* O1R1*/ 0xFFF0,
59 /* OMb */ 0xFF80,
60 /* OMc */ 0xFF00,
61 /* SIa */ 0xFE00,
63 /* MULSH */ 0xFF00,
64 /* OPSR */ 0xFFF8, /* psrset/psrclr */
66 /* JC */ 0, /* JC,JU,JL don't appear in object */
67 /* JU */ 0,
68 /* JL */ 0,
69 /* RSI */ 0,
70 /* DO21*/ 0,
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 };
90 int
91 print_insn_mcore (memaddr, info)
92 bfd_vma memaddr;
93 struct disassemble_info *info;
95 unsigned char ibytes[4];
96 fprintf_ftype fprintf = info->fprintf_func;
97 void *stream = info->stream;
98 unsigned short inst;
99 const mcore_opcode_info *op;
100 int status;
102 info->bytes_per_chunk = 2;
104 status = info->read_memory_func (memaddr, ibytes, 2, info);
106 if (status != 0)
108 info->memory_error_func (status, memaddr, info);
109 return -1;
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];
116 else
117 abort ();
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]))
122 break;
124 if (op->name == 0)
125 (*fprintf) (stream, ".short 0x%04x", inst);
126 else
128 const char *name = grname[inst & 0x0F];
130 (*fprintf) (stream, "%s", op->name);
132 switch (op->opclass)
134 case O0:
135 break;
137 case OT:
138 (*fprintf) (stream, "\t%d", inst & 0x3);
139 break;
141 case O1:
142 case JMP:
143 case JSR:
144 (*fprintf) (stream, "\t%s", name);
145 break;
147 case OC:
148 (*fprintf) (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]);
149 break;
151 case O1R1:
152 (*fprintf) (stream, "\t%s, r1", name);
153 break;
155 case MULSH:
156 case O2:
157 (*fprintf) (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]);
158 break;
160 case X1:
161 (*fprintf) (stream, "\tr1, %s", name);
162 break;
164 case OI:
165 (*fprintf) (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1);
166 break;
168 case RM:
169 (*fprintf) (stream, "\t%s-r15, (r0)", name);
170 break;
172 case RQ:
173 (*fprintf) (stream, "\tr4-r7, (%s)", name);
174 break;
176 case OB:
177 case OBRa:
178 case OBRb:
179 case OBRc:
180 case SI:
181 case SIa:
182 case OMa:
183 case OMb:
184 case OMc:
185 (*fprintf) (stream, "\t%s, %d", name, (inst >> 4) & 0x1F);
186 break;
188 case I7:
189 (*fprintf) (stream, "\t%s, %d", name, (inst >> 4) & 0x7F);
190 break;
192 case LS:
193 (*fprintf) (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
194 name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
195 break;
197 case BR:
199 long val = inst & 0x3FF;
201 if (inst & 0x400)
202 val |= 0xFFFFFC00;
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);
218 break;
220 case BL:
222 long val;
223 val = (inst & 0x000F);
224 (*fprintf) (stream, "\t%s, 0x%lx",
225 grname[(inst >> 4) & 0xF],
226 (long) (memaddr - (val << 1)));
228 break;
230 case LR:
232 unsigned long val;
234 val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
236 status = info->read_memory_func (val, ibytes, 4, info);
237 if (status != 0)
239 info->memory_error_func (status, memaddr, info);
240 break;
243 if (info->endian == BFD_ENDIAN_LITTLE)
244 val = (ibytes[3] << 24) | (ibytes[2] << 16)
245 | (ibytes[1] << 8) | (ibytes[0]);
246 else
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);
253 if (val == 0)
254 (*fprintf) (stream, "\t// from address pool at 0x%lx",
255 (long) (memaddr + 2
256 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
258 break;
260 case LJ:
262 unsigned long val;
264 val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
266 status = info->read_memory_func (val, ibytes, 4, info);
267 if (status != 0)
269 info->memory_error_func (status, memaddr, info);
270 break;
273 if (info->endian == BFD_ENDIAN_LITTLE)
274 val = (ibytes[3] << 24) | (ibytes[2] << 16)
275 | (ibytes[1] << 8) | (ibytes[0]);
276 else
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);
288 else
290 (*fprintf) (stream, "\t// from address pool at 0x%lx",
291 (long) (memaddr + 2
292 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
295 break;
297 case OPSR:
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]);
306 break;
308 default:
309 /* If the disassembler lags the instruction set. */
310 (*fprintf) (stream, "\tundecoded operands, inst is 0x%04x", inst);
311 break;
315 /* Say how many bytes we consumed. */
316 return 2;