source: trunk/src/binutils/opcodes/h8300-dis.c@ 402

Last change on this file since 402 was 10, checked in by bird, 23 years ago

Initial revision
  • Property cvs2svn:cvs-rev set to 1.1
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 8.9 KB
Line 
1/* Disassemble h8300 instructions.
2 Copyright 1993, 1994, 1996, 1998, 2000 Free Software Foundation, Inc.
3
4This program is free software; you can redistribute it and/or modify
5it under the terms of the GNU General Public License as published by
6the Free Software Foundation; either version 2 of the License, or
7(at your option) any later version.
8
9This program is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12GNU General Public License for more details.
13
14You should have received a copy of the GNU General Public License
15along with this program; if not, write to the Free Software
16Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
17
18#define DEFINE_TABLE
19
20#include "sysdep.h"
21#define h8_opcodes h8ops
22#include "opcode/h8300.h"
23#include "dis-asm.h"
24#include "opintl.h"
25
26/* Run through the opcodes and sort them into order to make them easy
27 to disassemble. */
28static void
29bfd_h8_disassemble_init ()
30{
31 unsigned int i;
32 struct h8_opcode *p;
33
34 for (p = h8_opcodes; p->name; p++)
35 {
36 int n1 = 0;
37 int n2 = 0;
38
39 if ((int) p->data.nib[0] < 16)
40 n1 = (int) p->data.nib[0];
41 else
42 n1 = 0;
43
44 if ((int) p->data.nib[1] < 16)
45 n2 = (int) p->data.nib[1];
46 else
47 n2 = 0;
48
49 /* Just make sure there are an even number of nibbles in it, and
50 that the count is the same as the length. */
51 for (i = 0; p->data.nib[i] != E; i++)
52 ;
53
54 if (i & 1)
55 abort ();
56
57 p->length = i / 2;
58 }
59}
60
61unsigned int
62bfd_h8_disassemble (addr, info, mode)
63 bfd_vma addr;
64 disassemble_info *info;
65 int mode;
66{
67 /* Find the first entry in the table for this opcode. */
68 static CONST char *regnames[] =
69 {
70 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
71 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
72 };
73 static CONST char *wregnames[] =
74 {
75 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
76 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
77 };
78 static CONST char *lregnames[] =
79 {
80 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
81 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
82 };
83 int rs = 0;
84 int rd = 0;
85 int rdisp = 0;
86 int abs = 0;
87 int bit = 0;
88 int plen = 0;
89 static boolean init = 0;
90 struct h8_opcode *q;
91 char CONST **pregnames = mode != 0 ? lregnames : wregnames;
92 int status;
93 int l;
94 unsigned char data[20];
95 void *stream = info->stream;
96 fprintf_ftype fprintf = info->fprintf_func;
97
98 if (!init)
99 {
100 bfd_h8_disassemble_init ();
101 init = 1;
102 }
103
104 status = info->read_memory_func (addr, data, 2, info);
105 if (status != 0)
106 {
107 info->memory_error_func (status, addr, info);
108 return -1;
109 }
110
111 for (l = 2; status == 0 && l < 10; l += 2)
112 status = info->read_memory_func (addr + l, data + l, 2, info);
113
114 /* Find the exact opcode/arg combo. */
115 for (q = h8_opcodes; q->name; q++)
116 {
117 op_type *nib = q->data.nib;
118 unsigned int len = 0;
119
120 while (1)
121 {
122 op_type looking_for = *nib;
123 int thisnib = data[len >> 1];
124
125 thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
126
127 if (looking_for < 16 && looking_for >= 0)
128 {
129 if (looking_for != thisnib)
130 goto fail;
131 }
132 else
133 {
134 if ((int) looking_for & (int) B31)
135 {
136 if (!(((int) thisnib & 0x8) != 0))
137 goto fail;
138
139 looking_for = (op_type) ((int) looking_for & ~(int) B31);
140 }
141
142 if ((int) looking_for & (int) B30)
143 {
144 if (!(((int) thisnib & 0x8) == 0))
145 goto fail;
146
147 looking_for = (op_type) ((int) looking_for & ~(int) B30);
148 }
149
150 if (looking_for & DBIT)
151 {
152 /* Exclude adds/subs by looking at bit 0 and 2, and
153 make sure the operand size, either w or l,
154 matches by looking at bit 1. */
155 if ((looking_for & 7) != (thisnib & 7))
156 goto fail;
157
158 abs = (thisnib & 0x8) ? 2 : 1;
159 }
160 else if (looking_for & (REG | IND | INC | DEC))
161 {
162 if (looking_for & SRC)
163 rs = thisnib;
164 else
165 rd = thisnib;
166 }
167 else if (looking_for & L_16)
168 {
169 abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1];
170 plen = 16;
171 }
172 else if (looking_for & ABSJMP)
173 {
174 abs = (data[1] << 16) | (data[2] << 8) | (data[3]);
175 }
176 else if (looking_for & MEMIND)
177 {
178 abs = data[1];
179 }
180 else if (looking_for & L_32)
181 {
182 int i = len >> 1;
183
184 abs = (data[i] << 24)
185 | (data[i + 1] << 16)
186 | (data[i + 2] << 8)
187 | (data[i + 3]);
188
189 plen = 32;
190 }
191 else if (looking_for & L_24)
192 {
193 int i = len >> 1;
194
195 abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
196 plen = 24;
197 }
198 else if (looking_for & IGNORE)
199 {
200 ;
201 }
202 else if (looking_for & DISPREG)
203 {
204 rdisp = thisnib;
205 }
206 else if (looking_for & KBIT)
207 {
208 switch (thisnib)
209 {
210 case 9:
211 abs = 4;
212 break;
213 case 8:
214 abs = 2;
215 break;
216 case 0:
217 abs = 1;
218 break;
219 default:
220 goto fail;
221 }
222 }
223 else if (looking_for & L_8)
224 {
225 plen = 8;
226 abs = data[len >> 1];
227 }
228 else if (looking_for & L_3)
229 {
230 bit = thisnib & 0x7;
231 }
232 else if (looking_for & L_2)
233 {
234 plen = 2;
235 abs = thisnib & 0x3;
236 }
237 else if (looking_for & MACREG)
238 {
239 abs = (thisnib == 3);
240 }
241 else if (looking_for == E)
242 {
243 int i;
244
245 for (i = 0; i < q->length; i++)
246 fprintf (stream, "%02x ", data[i]);
247
248 for (; i < 6; i++)
249 fprintf (stream, " ");
250
251 fprintf (stream, "%s\t", q->name);
252
253 /* Gross. Disgusting. */
254 if (strcmp (q->name, "ldm.l") == 0)
255 {
256 int count, high;
257
258 count = (data[1] >> 4) & 0x3;
259 high = data[3] & 0x7;
260
261 fprintf (stream, "@sp+,er%d-er%d", high - count, high);
262 return q->length;
263 }
264
265 if (strcmp (q->name, "stm.l") == 0)
266 {
267 int count, low;
268
269 count = (data[1] >> 4) & 0x3;
270 low = data[3] & 0x7;
271
272 fprintf (stream, "er%d-er%d,@-sp", low, low + count);
273 return q->length;
274 }
275
276 /* Fill in the args. */
277 {
278 op_type *args = q->args.nib;
279 int hadone = 0;
280
281 while (*args != E)
282 {
283 int x = *args;
284
285 if (hadone)
286 fprintf (stream, ",");
287
288 if (x & L_3)
289 {
290 fprintf (stream, "#0x%x", (unsigned) bit);
291 }
292 else if (x & (IMM | KBIT | DBIT))
293 {
294 /* Bletch. For shal #2,er0 and friends. */
295 if (*(args + 1) & SRC_IN_DST)
296 abs = 2;
297
298 fprintf (stream, "#0x%x", (unsigned) abs);
299 }
300 else if (x & REG)
301 {
302 int rn = (x & DST) ? rd : rs;
303
304 switch (x & SIZE)
305 {
306 case L_8:
307 fprintf (stream, "%s", regnames[rn]);
308 break;
309 case L_16:
310 fprintf (stream, "%s", wregnames[rn]);
311 break;
312 case L_P:
313 case L_32:
314 fprintf (stream, "%s", lregnames[rn]);
315 break;
316 }
317 }
318 else if (x & MACREG)
319 {
320 fprintf (stream, "mac%c", abs ? 'l' : 'h');
321 }
322 else if (x & INC)
323 {
324 fprintf (stream, "@%s+", pregnames[rs]);
325 }
326 else if (x & DEC)
327 {
328 fprintf (stream, "@-%s", pregnames[rd]);
329 }
330 else if (x & IND)
331 {
332 int rn = (x & DST) ? rd : rs;
333 fprintf (stream, "@%s", pregnames[rn]);
334 }
335 else if (x & ABS8MEM)
336 {
337 fprintf (stream, "@0x%x:8", (unsigned) abs);
338 }
339 else if (x & (ABS | ABSJMP))
340 {
341 fprintf (stream, "@0x%x:%d", (unsigned) abs, plen);
342 }
343 else if (x & MEMIND)
344 {
345 fprintf (stream, "@@%d (%x)", abs, abs);
346 }
347 else if (x & PCREL)
348 {
349 if (x & L_16)
350 {
351 abs += 2;
352 fprintf (stream,
353 ".%s%d (%x)",
354 (short) abs > 0 ? "+" : "",
355 (short) abs, addr + (short) abs + 2);
356 }
357 else
358 {
359 fprintf (stream,
360 ".%s%d (%x)",
361 (char) abs > 0 ? "+" : "",
362 (char) abs, addr + (char) abs + 2);
363 }
364 }
365 else if (x & DISP)
366 {
367 fprintf (stream, "@(0x%x:%d,%s)",
368 abs, plen, pregnames[rdisp]);
369 }
370 else if (x & CCR)
371 {
372 fprintf (stream, "ccr");
373 }
374 else if (x & EXR)
375 {
376 fprintf (stream, "exr");
377 }
378 else
379 /* xgettext:c-format */
380 fprintf (stream, _("Hmmmm %x"), x);
381
382 hadone = 1;
383 args++;
384 }
385 }
386
387 return q->length;
388 }
389 else
390 /* xgettext:c-format */
391 fprintf (stream, _("Don't understand %x \n"), looking_for);
392 }
393
394 len++;
395 nib++;
396 }
397
398 fail:
399 ;
400 }
401
402 /* Fell off the end. */
403 fprintf (stream, "%02x %02x .word\tH'%x,H'%x",
404 data[0], data[1],
405 data[0], data[1]);
406 return 2;
407}
408
409int
410print_insn_h8300 (addr, info)
411 bfd_vma addr;
412 disassemble_info *info;
413{
414 return bfd_h8_disassemble (addr, info, 0);
415}
416
417int
418print_insn_h8300h (addr, info)
419 bfd_vma addr;
420 disassemble_info *info;
421{
422 return bfd_h8_disassemble (addr, info, 1);
423}
424
425int
426print_insn_h8300s (addr, info)
427 bfd_vma addr;
428 disassemble_info *info;
429{
430 return bfd_h8_disassemble (addr, info, 2);
431}
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