Annotation of src/external/gpl3/binutils/dist/opcodes/mcore-dis.c, Revision 1.1.1.4
1.1 skrll 1: /* Disassemble Motorola M*Core instructions.
1.1.1.4 ! christos 2: Copyright (C) 1993-2016 Free Software Foundation, Inc.
1.1 skrll 3:
4: This file is part of the GNU opcodes library.
5:
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.
10:
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.
15:
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. */
20:
21: #include "sysdep.h"
22: #include <stdio.h>
1.1.1.4 ! christos 23: #include "libiberty.h"
1.1 skrll 24: #define STATIC_TABLE
25: #define DEFINE_TABLE
26:
27: #include "mcore-opc.h"
28: #include "dis-asm.h"
29:
30: /* Mask for each mcore_opclass: */
31: static const unsigned short imsk[] = {
32: /* O0 */ 0xFFFF,
33: /* OT */ 0xFFFC,
34: /* O1 */ 0xFFF0,
35: /* OC */ 0xFE00,
36: /* O2 */ 0xFF00,
37: /* X1 */ 0xFFF0,
38: /* OI */ 0xFE00,
39: /* OB */ 0xFE00,
40:
41: /* OMa */ 0xFFF0,
42: /* SI */ 0xFE00,
43: /* I7 */ 0xF800,
44: /* LS */ 0xF000,
45: /* BR */ 0xF800,
46: /* BL */ 0xFF00,
47: /* LR */ 0xF000,
48: /* LJ */ 0xFF00,
49:
50: /* RM */ 0xFFF0,
51: /* RQ */ 0xFFF0,
52: /* JSR */ 0xFFF0,
53: /* JMP */ 0xFFF0,
54: /* OBRa*/ 0xFFF0,
55: /* OBRb*/ 0xFF80,
56: /* OBRc*/ 0xFF00,
57: /* OBR2*/ 0xFE00,
58:
59: /* O1R1*/ 0xFFF0,
60: /* OMb */ 0xFF80,
61: /* OMc */ 0xFF00,
62: /* SIa */ 0xFE00,
63:
64: /* MULSH */ 0xFF00,
65: /* OPSR */ 0xFFF8, /* psrset/psrclr */
66:
67: /* JC */ 0, /* JC,JU,JL don't appear in object */
68: /* JU */ 0,
69: /* JL */ 0,
70: /* RSI */ 0,
71: /* DO21*/ 0,
72: /* OB2 */ 0 /* OB2 won't appear in object. */
73: };
74:
75: static const char *grname[] = {
76: "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
77: "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
78: };
79:
80: static const char X[] = "??";
81:
82: static const char *crname[] = {
83: "psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
84: "ss2", "ss3", "ss4", "gcr", "gsr", X, X, X,
85: X, X, X, X, X, X, X, X,
86: X, X, X, X, X, X, X, X
87: };
88:
89: static const unsigned isiz[] = { 2, 0, 1, 0 };
90:
91: int
1.1.1.3 christos 92: print_insn_mcore (bfd_vma memaddr,
93: struct disassemble_info *info)
1.1 skrll 94: {
95: unsigned char ibytes[4];
1.1.1.2 christos 96: fprintf_ftype print_func = info->fprintf_func;
1.1 skrll 97: void *stream = info->stream;
98: unsigned short inst;
1.1.1.4 ! christos 99: unsigned int i;
1.1 skrll 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: 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 ();
118:
119: /* Just a linear search of the table. */
1.1.1.4 ! christos 120: for (i = 0; i < ARRAY_SIZE (mcore_table); i++)
! 121: if (mcore_table[i].inst == (inst & imsk[mcore_table[i].opclass]))
1.1 skrll 122: break;
123:
1.1.1.4 ! christos 124: if (i == ARRAY_SIZE (mcore_table))
1.1.1.2 christos 125: (*print_func) (stream, ".short 0x%04x", inst);
1.1 skrll 126: else
127: {
128: const char *name = grname[inst & 0x0F];
129:
1.1.1.4 ! christos 130: (*print_func) (stream, "%s", mcore_table[i].name);
1.1 skrll 131:
1.1.1.4 ! christos 132: switch (mcore_table[i].opclass)
1.1 skrll 133: {
134: case O0:
135: break;
136:
137: case OT:
1.1.1.2 christos 138: (*print_func) (stream, "\t%d", inst & 0x3);
1.1 skrll 139: break;
140:
141: case O1:
142: case JMP:
143: case JSR:
1.1.1.2 christos 144: (*print_func) (stream, "\t%s", name);
1.1 skrll 145: break;
146:
147: case OC:
1.1.1.2 christos 148: (*print_func) (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]);
1.1 skrll 149: break;
150:
151: case O1R1:
1.1.1.2 christos 152: (*print_func) (stream, "\t%s, r1", name);
1.1 skrll 153: break;
154:
155: case MULSH:
156: case O2:
1.1.1.2 christos 157: (*print_func) (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]);
1.1 skrll 158: break;
159:
160: case X1:
1.1.1.2 christos 161: (*print_func) (stream, "\tr1, %s", name);
1.1 skrll 162: break;
163:
164: case OI:
1.1.1.2 christos 165: (*print_func) (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1);
1.1 skrll 166: break;
167:
168: case RM:
1.1.1.2 christos 169: (*print_func) (stream, "\t%s-r15, (r0)", name);
1.1 skrll 170: break;
171:
172: case RQ:
1.1.1.2 christos 173: (*print_func) (stream, "\tr4-r7, (%s)", name);
1.1 skrll 174: break;
175:
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:
1.1.1.2 christos 185: (*print_func) (stream, "\t%s, %d", name, (inst >> 4) & 0x1F);
1.1 skrll 186: break;
187:
188: case I7:
1.1.1.2 christos 189: (*print_func) (stream, "\t%s, %d", name, (inst >> 4) & 0x7F);
1.1 skrll 190: break;
191:
192: case LS:
1.1.1.2 christos 193: (*print_func) (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
194: name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
1.1 skrll 195: break;
196:
197: case BR:
198: {
199: long val = inst & 0x3FF;
200:
201: if (inst & 0x400)
202: val |= 0xFFFFFC00;
203:
1.1.1.2 christos 204: (*print_func) (stream, "\t0x%lx", (long)(memaddr + 2 + (val << 1)));
1.1 skrll 205:
1.1.1.4 ! christos 206: if (strcmp (mcore_table[i].name, "bsr") == 0)
1.1 skrll 207: {
208: /* For bsr, we'll try to get a symbol for the target. */
209: val = memaddr + 2 + (val << 1);
210:
211: if (info->print_address_func && val != 0)
212: {
1.1.1.2 christos 213: (*print_func) (stream, "\t// ");
1.1 skrll 214: info->print_address_func (val, info);
215: }
216: }
217: }
218: break;
219:
220: case BL:
221: {
222: long val;
223: val = (inst & 0x000F);
1.1.1.2 christos 224: (*print_func) (stream, "\t%s, 0x%lx",
225: grname[(inst >> 4) & 0xF],
226: (long) (memaddr - (val << 1)));
1.1 skrll 227: }
228: break;
229:
230: case LR:
231: {
232: unsigned long val;
233:
234: val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
235:
1.1.1.3 christos 236: /* We are not reading an instruction, so allow
237: reads to extend beyond the next symbol. */
238: info->stop_vma = 0;
1.1 skrll 239: status = info->read_memory_func (val, ibytes, 4, info);
240: if (status != 0)
241: {
242: info->memory_error_func (status, memaddr, info);
243: break;
244: }
245:
246: if (info->endian == BFD_ENDIAN_LITTLE)
247: val = (ibytes[3] << 24) | (ibytes[2] << 16)
248: | (ibytes[1] << 8) | (ibytes[0]);
249: else
250: val = (ibytes[0] << 24) | (ibytes[1] << 16)
251: | (ibytes[2] << 8) | (ibytes[3]);
252:
253: /* Removed [] around literal value to match ABI syntax 12/95. */
1.1.1.2 christos 254: (*print_func) (stream, "\t%s, 0x%lX", grname[(inst >> 8) & 0xF], val);
1.1 skrll 255:
256: if (val == 0)
1.1.1.2 christos 257: (*print_func) (stream, "\t// from address pool at 0x%lx",
258: (long) (memaddr + 2
259: + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
1.1 skrll 260: }
261: break;
262:
263: case LJ:
264: {
265: unsigned long val;
266:
267: val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
268:
1.1.1.3 christos 269: /* We are not reading an instruction, so allow
270: reads to extend beyond the next symbol. */
271: info->stop_vma = 0;
1.1 skrll 272: status = info->read_memory_func (val, ibytes, 4, info);
273: if (status != 0)
274: {
275: info->memory_error_func (status, memaddr, info);
276: break;
277: }
278:
279: if (info->endian == BFD_ENDIAN_LITTLE)
280: val = (ibytes[3] << 24) | (ibytes[2] << 16)
281: | (ibytes[1] << 8) | (ibytes[0]);
282: else
283: val = (ibytes[0] << 24) | (ibytes[1] << 16)
284: | (ibytes[2] << 8) | (ibytes[3]);
285:
286: /* Removed [] around literal value to match ABI syntax 12/95. */
1.1.1.2 christos 287: (*print_func) (stream, "\t0x%lX", val);
1.1 skrll 288: /* For jmpi/jsri, we'll try to get a symbol for the target. */
289: if (info->print_address_func && val != 0)
290: {
1.1.1.2 christos 291: (*print_func) (stream, "\t// ");
1.1 skrll 292: info->print_address_func (val, info);
293: }
294: else
295: {
1.1.1.2 christos 296: (*print_func) (stream, "\t// from address pool at 0x%lx",
297: (long) (memaddr + 2
298: + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
1.1 skrll 299: }
300: }
301: break;
302:
303: case OPSR:
304: {
305: static char *fields[] = {
306: "af", "ie", "fe", "fe,ie",
307: "ee", "ee,ie", "ee,fe", "ee,fe,ie"
308: };
309:
1.1.1.2 christos 310: (*print_func) (stream, "\t%s", fields[inst & 0x7]);
1.1 skrll 311: }
312: break;
313:
314: default:
315: /* If the disassembler lags the instruction set. */
1.1.1.2 christos 316: (*print_func) (stream, "\tundecoded operands, inst is 0x%04x", inst);
1.1 skrll 317: break;
318: }
319: }
320:
321: /* Say how many bytes we consumed. */
322: return 2;
323: }
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