1 /* Disassemble Motorola M*Core instructions.
2 Copyright (C) 1993, 1999, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #include "mcore-opc.h"
25 /* Mask for each mcore_opclass: */
26 static const unsigned short imsk[] =
61 /* OPSR */ 0xFFF8, /* psrset/psrclr */
63 /* JC */ 0, /* JC,JU,JL don't appear in object */
68 /* OB2 */ 0 /* OB2 won't appear in object. */
71 static const char * grname[] =
73 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
74 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
77 static const char X[] = "??";
79 static const char * crname[] =
81 "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
82 "ss2", "ss3", "ss4", "gcr", "gsr", X, X, X,
83 X, X, X, X, X, X, X, X,
84 X, X, X, X, X, X, X, X
87 static const unsigned isiz[] = { 2, 0, 1, 0 };
90 print_insn_mcore (memaddr, info)
92 struct disassemble_info * info;
94 unsigned char ibytes[4];
95 fprintf_ftype fprintf = info->fprintf_func;
96 void * stream = info->stream;
98 mcore_opcode_info * op;
101 info->bytes_per_chunk = 2;
103 status = info->read_memory_func (memaddr, ibytes, 2, info);
107 info->memory_error_func (status, memaddr, info);
111 if (info->endian == BFD_ENDIAN_BIG)
112 inst = (ibytes[0] << 8) | ibytes[1];
113 else if (info->endian == BFD_ENDIAN_LITTLE)
114 inst = (ibytes[1] << 8) | ibytes[0];
118 /* Just a linear search of the table. */
119 for (op = mcore_table; op->name != 0; op ++)
120 if (op->inst == (inst & imsk[op->opclass]))
124 fprintf (stream, ".short 0x%04x", inst);
127 const char * name = grname[inst & 0x0F];
129 fprintf (stream, "%s", op->name);
134 case OT: fprintf (stream, "\t%d", inst & 0x3); break;
137 case JSR: fprintf (stream, "\t%s", name); break;
138 case OC: fprintf (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]); break;
139 case O1R1: fprintf (stream, "\t%s, r1", name); break;
141 case O2: fprintf (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]); break;
142 case X1: fprintf (stream, "\tr1, %s", name); break;
143 case OI: fprintf (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1); break;
144 case RM: fprintf (stream, "\t%s-r15, (r0)", name); break;
145 case RQ: fprintf (stream, "\tr4-r7, (%s)", name); break;
154 case OMc: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x1F); break;
155 case I7: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x7F); break;
156 case LS: fprintf (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
157 name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
162 long val = inst & 0x3FF;
167 fprintf (stream, "\t0x%x", memaddr + 2 + (val<<1));
169 if (strcmp (op->name, "bsr") == 0)
171 /* for bsr, we'll try to get a symbol for the target */
172 val = memaddr + 2 + (val << 1);
174 if (info->print_address_func && val != 0)
176 fprintf (stream, "\t// ");
177 info->print_address_func (val, info);
186 val = (inst & 0x000F);
187 fprintf (stream, "\t%s, 0x%x",
188 grname[(inst >> 4) & 0xF], memaddr - (val << 1));
196 val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
198 status = info->read_memory_func (val, ibytes, 4, info);
201 info->memory_error_func (status, memaddr, info);
205 if (info->endian == BFD_ENDIAN_LITTLE)
206 val = (ibytes[3] << 24) | (ibytes[2] << 16)
207 | (ibytes[1] << 8) | (ibytes[0]);
209 val = (ibytes[0] << 24) | (ibytes[1] << 16)
210 | (ibytes[2] << 8) | (ibytes[3]);
212 /* Removed [] around literal value to match ABI syntax 12/95. */
213 fprintf (stream, "\t%s, 0x%X", grname[(inst >> 8) & 0xF], val);
216 fprintf (stream, "\t// from address pool at 0x%x",
217 (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
225 val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
227 status = info->read_memory_func (val, ibytes, 4, info);
230 info->memory_error_func (status, memaddr, info);
234 if (info->endian == BFD_ENDIAN_LITTLE)
235 val = (ibytes[3] << 24) | (ibytes[2] << 16)
236 | (ibytes[1] << 8) | (ibytes[0]);
238 val = (ibytes[0] << 24) | (ibytes[1] << 16)
239 | (ibytes[2] << 8) | (ibytes[3]);
241 /* Removed [] around literal value to match ABI syntax 12/95. */
242 fprintf (stream, "\t0x%X", val);
243 /* For jmpi/jsri, we'll try to get a symbol for the target. */
244 if (info->print_address_func && val != 0)
246 fprintf (stream, "\t// ");
247 info->print_address_func (val, info);
251 fprintf (stream, "\t// from address pool at 0x%x",
252 (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
259 static char * fields[] =
261 "af", "ie", "fe", "fe,ie",
262 "ee", "ee,ie", "ee,fe", "ee,fe,ie"
265 fprintf (stream, "\t%s", fields[inst & 0x7]);
270 /* if the disassembler lags the instruction set */
271 fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
276 /* Say how many bytes we consumed? */