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[] =
60 /* start-sanitize-m340 */
62 /* end-sanitize-m340 */
64 /* JC */ 0, /* JC,JU,JL don't appear in object */
69 /* OB2 */ 0 /* OB2 won't appear in object. */
72 static const char * grname[] =
74 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
75 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
78 static const char X[] = "??";
80 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 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 /* start-sanitize-m340 */
113 if (info->endian == BFD_ENDIAN_BIG)
114 /* end-sanitize-m340 */
115 inst = (ibytes[0] << 8) | ibytes[1];
116 /* start-sanitize-m340 */
117 else if (info->endian == BFD_ENDIAN_LITTLE)
118 inst = (ibytes[1] << 8) | ibytes[0];
121 /* end-sanitize-m340 */
123 /* Just a linear search of the table. */
124 for (op = mcore_table; op->name != 0; op ++)
125 if (op->inst == (inst & imsk[op->opclass]))
129 fprintf (stream, ".word 0x%04x", inst);
132 const char * name = grname[inst & 0x0F];
134 fprintf (stream, "%s", op->name);
139 case OT: fprintf (stream, "\t%d", inst & 0x3); break;
142 case JSR: fprintf (stream, "\t%s", name); break;
143 case OC: fprintf (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]); break;
144 case O1R1: fprintf (stream, "\t%s, r1", name); break;
145 /* start-sanitize-m340 */
147 /* end-sanitize-m340 */
148 case O2: fprintf (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]); break;
149 case X1: fprintf (stream, "\tr1, %s", name); break;
150 case OI: fprintf (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1); break;
151 case RM: fprintf (stream, "\t%s-r15, (r0)", name); break;
152 case RQ: fprintf (stream, "\tr4-r7, (%s)", name); break;
161 case OMc: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x1F); break;
162 case I7: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x7F); break;
163 case LS: fprintf (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
164 name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
169 long val = inst & 0x3FF;
174 fprintf (stream, "\t0x%x", memaddr + 2 + (val<<1));
176 if (strcmp (op->name, "bsr") == 0)
178 /* for bsr, we'll try to get a symbol for the target */
179 val = memaddr + 2 + (val << 1);
181 if (info->print_address_func && val != 0)
183 fprintf (stream, "\t// ");
184 info->print_address_func (val, info);
193 val = (inst & 0x000F);
194 fprintf (stream, "\t%s, 0x%x",
195 grname[(inst >> 4) & 0xF], memaddr - (val << 1));
203 val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
205 status = info->read_memory_func (val, ibytes, 4, info);
208 info->memory_error_func (status, memaddr, info);
212 /* start-sanitize-m340 */
213 if (info->endian == BFD_ENDIAN_LITTLE)
214 val = (ibytes[3] << 24) | (ibytes[2] << 16)
215 | (ibytes[1] << 8) | (ibytes[0]);
217 /* end-sanitize-m340 */
218 val = (ibytes[0] << 24) | (ibytes[1] << 16)
219 | (ibytes[2] << 8) | (ibytes[3]);
221 /* Removed [] around literal value to match ABI syntax 12/95. */
222 fprintf (stream, "\t%s, 0x%X", grname[(inst >> 8) & 0xF], val);
225 fprintf (stream, "\t// from address pool at 0x%x",
226 (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
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 /* start-sanitize-m340 */
244 if (info->endian == BFD_ENDIAN_LITTLE)
245 val = (ibytes[3] << 24) | (ibytes[2] << 16)
246 | (ibytes[1] << 8) | (ibytes[0]);
248 /* end-sanitize-m340 */
249 val = (ibytes[0] << 24) | (ibytes[1] << 16)
250 | (ibytes[2] << 8) | (ibytes[3]);
252 /* Removed [] around literal value to match ABI syntax 12/95. */
253 fprintf (stream, "\t0x%X", val);
254 /* For jmpi/jsri, we'll try to get a symbol for the target. */
255 if (info->print_address_func && val != 0)
257 fprintf (stream, "\t// ");
258 info->print_address_func (val, info);
262 fprintf (stream, "\t// from address pool at 0x%x",
263 (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
269 /* if the disassembler lags the instruction set */
270 fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
275 /* Say how many bytes we consumed? */