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? */