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3f230321 NC |
1 | /* Disassemble Motorolla M*Core instructions. |
2 | Copyright (C) 1993, 1999 Free Software Foundation, Inc. | |
3 | ||
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. | |
8 | ||
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. | |
13 | ||
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. */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #define STATIC_TABLE | |
20 | #define DEFINE_TABLE | |
21 | ||
22 | #include "mcore-opc.h" | |
23 | #include "dis-asm.h" | |
24 | ||
25 | /* Mask for each mcore_opclass: */ | |
26 | static const unsigned short imsk[] = | |
27 | { | |
28 | /* O0 */ 0xFFFF, | |
29 | /* OT */ 0xFFFC, | |
30 | /* O1 */ 0xFFF0, | |
31 | /* OC */ 0xFFE0, | |
32 | /* O2 */ 0xFF00, | |
33 | /* X1 */ 0xFFF0, | |
34 | /* OI */ 0xFE00, | |
35 | /* OB */ 0xFE00, | |
36 | ||
37 | /* OMa */ 0xFFF0, | |
38 | /* SI */ 0xFE00, | |
39 | /* I7 */ 0xF800, | |
40 | /* LS */ 0xF000, | |
41 | /* BR */ 0xF800, | |
42 | /* BL */ 0xFF00, | |
43 | /* LR */ 0xF000, | |
44 | /* LJ */ 0xFF00, | |
45 | ||
46 | /* RM */ 0xFFF0, | |
47 | /* RQ */ 0xFFF0, | |
48 | /* JSR */ 0xFFF0, | |
49 | /* JMP */ 0xFFF0, | |
50 | /* OBRa*/ 0xFFF0, | |
51 | /* OBRb*/ 0xFF80, | |
52 | /* OBRc*/ 0xFF00, | |
53 | /* OBR2*/ 0xFE00, | |
54 | ||
55 | /* O1R1*/ 0xFFF0, | |
56 | /* OMb */ 0xFF80, | |
57 | /* OMc */ 0xFF00, | |
58 | /* SIa */ 0xFE00, | |
59 | ||
60 | /* start-sanitize-m340 */ | |
61 | /* MULSH */ 0xFF00, | |
62 | /* end-sanitize-m340 */ | |
63 | ||
64 | /* JC */ 0, /* JC,JU,JL don't appear in object */ | |
65 | /* JU */ 0, | |
66 | /* JL */ 0, | |
67 | /* RSI */ 0, | |
68 | /* DO21*/ 0, | |
69 | /* OB2 */ 0 /* OB2 won't appear in object. */ | |
70 | }; | |
71 | ||
72 | static const char * grname[] = | |
73 | { | |
74 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
75 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | |
76 | }; | |
77 | ||
78 | static const char X[] = "??"; | |
79 | ||
80 | static const char * crname[] = | |
81 | { | |
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 | |
86 | }; | |
87 | ||
88 | static const unsigned isiz[] = { 2, 0, 1, 0 }; | |
89 | ||
90 | int | |
91 | print_insn_mcore (memaddr, info) | |
92 | bfd_vma memaddr; | |
93 | struct disassemble_info * info; | |
94 | { | |
95 | unsigned char ibytes[4]; | |
96 | fprintf_ftype fprintf = info->fprintf_func; | |
97 | void * stream = info->stream; | |
98 | unsigned short inst; | |
99 | mcore_opcode_info * op; | |
100 | int status; | |
101 | ||
102 | info->bytes_per_chunk = 2; | |
103 | ||
104 | status = info->read_memory_func (memaddr, ibytes, 2, info); | |
105 | ||
106 | if (status != 0) | |
107 | { | |
108 | info->memory_error_func (status, memaddr, info); | |
109 | return -1; | |
110 | } | |
111 | ||
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]; | |
119 | else | |
120 | abort (); | |
121 | /* end-sanitize-m340 */ | |
122 | ||
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])) | |
126 | break; | |
127 | ||
128 | if (op->name == 0) | |
88685153 | 129 | fprintf (stream, ".short 0x%04x", inst); |
3f230321 NC |
130 | else |
131 | { | |
132 | const char * name = grname[inst & 0x0F]; | |
133 | ||
134 | fprintf (stream, "%s", op->name); | |
135 | ||
136 | switch (op->opclass) | |
137 | { | |
138 | case O0: break; | |
139 | case OT: fprintf (stream, "\t%d", inst & 0x3); break; | |
140 | case O1: | |
141 | case JMP: | |
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 */ | |
146 | case MULSH: | |
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; | |
153 | case OB: | |
154 | case OBRa: | |
155 | case OBRb: | |
156 | case OBRc: | |
157 | case SI: | |
158 | case SIa: | |
159 | case OMa: | |
160 | case OMb: | |
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]); | |
165 | break; | |
166 | ||
167 | case BR: | |
168 | { | |
169 | long val = inst & 0x3FF; | |
170 | ||
171 | if (inst & 0x400) | |
172 | val |= 0xFFFFFC00; | |
173 | ||
174 | fprintf (stream, "\t0x%x", memaddr + 2 + (val<<1)); | |
175 | ||
176 | if (strcmp (op->name, "bsr") == 0) | |
177 | { | |
178 | /* for bsr, we'll try to get a symbol for the target */ | |
179 | val = memaddr + 2 + (val << 1); | |
180 | ||
181 | if (info->print_address_func && val != 0) | |
182 | { | |
183 | fprintf (stream, "\t// "); | |
184 | info->print_address_func (val, info); | |
185 | } | |
186 | } | |
187 | } | |
188 | break; | |
189 | ||
190 | case BL: | |
191 | { | |
192 | long val; | |
193 | val = (inst & 0x000F); | |
194 | fprintf (stream, "\t%s, 0x%x", | |
195 | grname[(inst >> 4) & 0xF], memaddr - (val << 1)); | |
196 | } | |
197 | break; | |
198 | ||
199 | case LR: | |
200 | { | |
201 | unsigned long val; | |
202 | ||
203 | val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC; | |
204 | ||
205 | status = info->read_memory_func (val, ibytes, 4, info); | |
206 | if (status != 0) | |
207 | { | |
208 | info->memory_error_func (status, memaddr, info); | |
209 | break; | |
210 | } | |
211 | ||
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]); | |
216 | else | |
217 | /* end-sanitize-m340 */ | |
218 | val = (ibytes[0] << 24) | (ibytes[1] << 16) | |
219 | | (ibytes[2] << 8) | (ibytes[3]); | |
220 | ||
221 | /* Removed [] around literal value to match ABI syntax 12/95. */ | |
222 | fprintf (stream, "\t%s, 0x%X", grname[(inst >> 8) & 0xF], val); | |
223 | ||
224 | if (val == 0) | |
225 | fprintf (stream, "\t// from address pool at 0x%x", | |
226 | (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC); | |
227 | } | |
228 | break; | |
229 | ||
230 | case LJ: | |
231 | { | |
232 | unsigned long val; | |
233 | ||
234 | val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC; | |
235 | ||
236 | status = info->read_memory_func (val, ibytes, 4, info); | |
237 | if (status != 0) | |
238 | { | |
239 | info->memory_error_func (status, memaddr, info); | |
240 | break; | |
241 | } | |
242 | ||
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]); | |
247 | else | |
248 | /* end-sanitize-m340 */ | |
249 | val = (ibytes[0] << 24) | (ibytes[1] << 16) | |
250 | | (ibytes[2] << 8) | (ibytes[3]); | |
251 | ||
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) | |
256 | { | |
257 | fprintf (stream, "\t// "); | |
258 | info->print_address_func (val, info); | |
259 | } | |
260 | else | |
261 | { | |
262 | fprintf (stream, "\t// from address pool at 0x%x", | |
263 | (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC); | |
264 | } | |
265 | } | |
266 | break; | |
267 | ||
268 | default: | |
269 | /* if the disassembler lags the instruction set */ | |
270 | fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst); | |
271 | break; | |
272 | } | |
273 | } | |
274 | ||
275 | /* Say how many bytes we consumed? */ | |
276 | return 2; | |
277 | } |