Commit | Line | Data |
---|---|---|
adde6300 | 1 | /* Disassemble AVR instructions. |
4b95cf5c | 2 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
adde6300 AM |
3 | |
4 | Contributed by Denis Chertykov <denisc@overta.ru> | |
5 | ||
9b201bb5 NC |
6 | This file is part of libopcodes. |
7 | ||
8 | This library is free software; you can redistribute it and/or modify | |
47b0e7ad | 9 | it under the terms of the GNU General Public License as published by |
9b201bb5 NC |
10 | the Free Software Foundation; either version 3, or (at your option) |
11 | any later version. | |
adde6300 | 12 | |
9b201bb5 NC |
13 | It is distributed in the hope that it will be useful, but WITHOUT |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
adde6300 | 17 | |
47b0e7ad NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
9b201bb5 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
adde6300 | 22 | |
0d8dfecf | 23 | #include "sysdep.h" |
df7b86aa | 24 | #include <assert.h> |
adde6300 AM |
25 | #include "dis-asm.h" |
26 | #include "opintl.h" | |
11041102 | 27 | #include "libiberty.h" |
3c504221 | 28 | |
bab84c47 | 29 | struct avr_opcodes_s |
adde6300 | 30 | { |
bab84c47 DC |
31 | char *name; |
32 | char *constraints; | |
33 | char *opcode; | |
47b0e7ad | 34 | int insn_size; /* In words. */ |
bab84c47 DC |
35 | int isa; |
36 | unsigned int bin_opcode; | |
bab84c47 | 37 | }; |
adde6300 | 38 | |
bab84c47 | 39 | #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ |
11041102 | 40 | {#NAME, CONSTR, OPCODE, SIZE, ISA, BIN}, |
adde6300 | 41 | |
11041102 | 42 | const struct avr_opcodes_s avr_opcodes[] = |
adde6300 | 43 | { |
bab84c47 | 44 | #include "opcode/avr.h" |
11041102 | 45 | {NULL, NULL, NULL, 0, 0, 0} |
bab84c47 | 46 | }; |
adde6300 | 47 | |
af692060 NC |
48 | static const char * comment_start = "0x"; |
49 | ||
463f102c | 50 | static int |
246f4c05 | 51 | avr_operand (unsigned int insn, unsigned int insn2, unsigned int pc, int constraint, |
8cc66334 | 52 | char *opcode_str, char *buf, char *comment, int regs, int *sym, bfd_vma *sym_addr) |
adde6300 | 53 | { |
463f102c | 54 | int ok = 1; |
246f4c05 | 55 | *sym = 0; |
463f102c | 56 | |
bab84c47 DC |
57 | switch (constraint) |
58 | { | |
59 | /* Any register operand. */ | |
60 | case 'r': | |
61 | if (regs) | |
47b0e7ad | 62 | insn = (insn & 0xf) | ((insn & 0x0200) >> 5); /* Source register. */ |
bab84c47 | 63 | else |
47b0e7ad | 64 | insn = (insn & 0x01f0) >> 4; /* Destination register. */ |
bab84c47 DC |
65 | |
66 | sprintf (buf, "r%d", insn); | |
67 | break; | |
68 | ||
69 | case 'd': | |
70 | if (regs) | |
71 | sprintf (buf, "r%d", 16 + (insn & 0xf)); | |
72 | else | |
73 | sprintf (buf, "r%d", 16 + ((insn & 0xf0) >> 4)); | |
74 | break; | |
75 | ||
76 | case 'w': | |
77 | sprintf (buf, "r%d", 24 + ((insn & 0x30) >> 3)); | |
78 | break; | |
79 | ||
80 | case 'a': | |
81 | if (regs) | |
82 | sprintf (buf, "r%d", 16 + (insn & 7)); | |
83 | else | |
84 | sprintf (buf, "r%d", 16 + ((insn >> 4) & 7)); | |
85 | break; | |
adde6300 | 86 | |
bab84c47 DC |
87 | case 'v': |
88 | if (regs) | |
89 | sprintf (buf, "r%d", (insn & 0xf) * 2); | |
90 | else | |
91 | sprintf (buf, "r%d", ((insn & 0xf0) >> 3)); | |
92 | break; | |
93 | ||
94 | case 'e': | |
463f102c DC |
95 | { |
96 | char *xyz; | |
97 | ||
98 | switch (insn & 0x100f) | |
99 | { | |
100 | case 0x0000: xyz = "Z"; break; | |
101 | case 0x1001: xyz = "Z+"; break; | |
102 | case 0x1002: xyz = "-Z"; break; | |
103 | case 0x0008: xyz = "Y"; break; | |
104 | case 0x1009: xyz = "Y+"; break; | |
105 | case 0x100a: xyz = "-Y"; break; | |
106 | case 0x100c: xyz = "X"; break; | |
107 | case 0x100d: xyz = "X+"; break; | |
108 | case 0x100e: xyz = "-X"; break; | |
109 | default: xyz = "??"; ok = 0; | |
110 | } | |
c8941035 | 111 | strcpy (buf, xyz); |
463f102c DC |
112 | |
113 | if (AVR_UNDEF_P (insn)) | |
114 | sprintf (comment, _("undefined")); | |
115 | } | |
bab84c47 DC |
116 | break; |
117 | ||
118 | case 'z': | |
119 | *buf++ = 'Z'; | |
8cc66334 EW |
120 | |
121 | /* Check for post-increment. */ | |
122 | char *s; | |
123 | for (s = opcode_str; *s; ++s) | |
124 | { | |
125 | if (*s == '+') | |
126 | { | |
5d73b1f1 NC |
127 | if (insn & (1 << (15 - (s - opcode_str)))) |
128 | *buf++ = '+'; | |
8cc66334 EW |
129 | break; |
130 | } | |
131 | } | |
132 | ||
bab84c47 | 133 | *buf = '\0'; |
463f102c DC |
134 | if (AVR_UNDEF_P (insn)) |
135 | sprintf (comment, _("undefined")); | |
bab84c47 DC |
136 | break; |
137 | ||
138 | case 'b': | |
139 | { | |
463f102c | 140 | unsigned int x; |
bab84c47 DC |
141 | |
142 | x = (insn & 7); | |
143 | x |= (insn >> 7) & (3 << 3); | |
144 | x |= (insn >> 8) & (1 << 5); | |
145 | ||
146 | if (insn & 0x8) | |
147 | *buf++ = 'Y'; | |
148 | else | |
149 | *buf++ = 'Z'; | |
150 | sprintf (buf, "+%d", x); | |
151 | sprintf (comment, "0x%02x", x); | |
152 | } | |
153 | break; | |
154 | ||
155 | case 'h': | |
246f4c05 SS |
156 | *sym = 1; |
157 | *sym_addr = ((((insn & 1) | ((insn & 0x1f0) >> 3)) << 16) | insn2) * 2; | |
c4f5c3d7 | 158 | /* See PR binutils/2454. Ideally we would like to display the hex |
52f16a0e NC |
159 | value of the address only once, but this would mean recoding |
160 | objdump_print_address() which would affect many targets. */ | |
00988f49 | 161 | sprintf (buf, "%#lx", (unsigned long) *sym_addr); |
c8941035 | 162 | strcpy (comment, comment_start); |
bab84c47 DC |
163 | break; |
164 | ||
165 | case 'L': | |
166 | { | |
167 | int rel_addr = (((insn & 0xfff) ^ 0x800) - 0x800) * 2; | |
168 | sprintf (buf, ".%+-8d", rel_addr); | |
246f4c05 SS |
169 | *sym = 1; |
170 | *sym_addr = pc + 2 + rel_addr; | |
c8941035 | 171 | strcpy (comment, comment_start); |
bab84c47 DC |
172 | } |
173 | break; | |
174 | ||
175 | case 'l': | |
176 | { | |
177 | int rel_addr = ((((insn >> 3) & 0x7f) ^ 0x40) - 0x40) * 2; | |
af692060 | 178 | |
bab84c47 | 179 | sprintf (buf, ".%+-8d", rel_addr); |
246f4c05 SS |
180 | *sym = 1; |
181 | *sym_addr = pc + 2 + rel_addr; | |
c8941035 | 182 | strcpy (comment, comment_start); |
bab84c47 DC |
183 | } |
184 | break; | |
185 | ||
186 | case 'i': | |
187 | sprintf (buf, "0x%04X", insn2); | |
188 | break; | |
189 | ||
190 | case 'M': | |
191 | sprintf (buf, "0x%02X", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
192 | sprintf (comment, "%d", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
193 | break; | |
194 | ||
195 | case 'n': | |
463f102c DC |
196 | sprintf (buf, "??"); |
197 | fprintf (stderr, _("Internal disassembler error")); | |
198 | ok = 0; | |
bab84c47 DC |
199 | break; |
200 | ||
201 | case 'K': | |
463f102c DC |
202 | { |
203 | unsigned int x; | |
204 | ||
205 | x = (insn & 0xf) | ((insn >> 2) & 0x30); | |
206 | sprintf (buf, "0x%02x", x); | |
207 | sprintf (comment, "%d", x); | |
208 | } | |
bab84c47 DC |
209 | break; |
210 | ||
211 | case 's': | |
212 | sprintf (buf, "%d", insn & 7); | |
213 | break; | |
214 | ||
215 | case 'S': | |
216 | sprintf (buf, "%d", (insn >> 4) & 7); | |
217 | break; | |
218 | ||
219 | case 'P': | |
220 | { | |
221 | unsigned int x; | |
47b0e7ad | 222 | |
bab84c47 DC |
223 | x = (insn & 0xf); |
224 | x |= (insn >> 5) & 0x30; | |
225 | sprintf (buf, "0x%02x", x); | |
226 | sprintf (comment, "%d", x); | |
227 | } | |
228 | break; | |
229 | ||
230 | case 'p': | |
231 | { | |
232 | unsigned int x; | |
233 | ||
234 | x = (insn >> 3) & 0x1f; | |
235 | sprintf (buf, "0x%02x", x); | |
236 | sprintf (comment, "%d", x); | |
237 | } | |
238 | break; | |
239 | ||
8cc66334 EW |
240 | case 'E': |
241 | sprintf (buf, "%d", (insn >> 4) & 15); | |
242 | break; | |
243 | ||
bab84c47 DC |
244 | case '?': |
245 | *buf = '\0'; | |
246 | break; | |
247 | ||
248 | default: | |
463f102c DC |
249 | sprintf (buf, "??"); |
250 | fprintf (stderr, _("unknown constraint `%c'"), constraint); | |
251 | ok = 0; | |
bab84c47 | 252 | } |
463f102c DC |
253 | |
254 | return ok; | |
adde6300 AM |
255 | } |
256 | ||
bab84c47 | 257 | static unsigned short |
47b0e7ad | 258 | avrdis_opcode (bfd_vma addr, disassemble_info *info) |
adde6300 AM |
259 | { |
260 | bfd_byte buffer[2]; | |
261 | int status; | |
47b0e7ad NC |
262 | |
263 | status = info->read_memory_func (addr, buffer, 2, info); | |
264 | ||
265 | if (status == 0) | |
266 | return bfd_getl16 (buffer); | |
267 | ||
268 | info->memory_error_func (status, addr, info); | |
269 | return -1; | |
adde6300 AM |
270 | } |
271 | ||
272 | ||
273 | int | |
47b0e7ad | 274 | print_insn_avr (bfd_vma addr, disassemble_info *info) |
adde6300 | 275 | { |
bab84c47 | 276 | unsigned int insn, insn2; |
11041102 KD |
277 | const struct avr_opcodes_s *opcode; |
278 | static unsigned int *maskptr; | |
adde6300 AM |
279 | void *stream = info->stream; |
280 | fprintf_ftype prin = info->fprintf_func; | |
11041102 | 281 | static unsigned int *avr_bin_masks; |
bab84c47 | 282 | static int initialized; |
adde6300 | 283 | int cmd_len = 2; |
463f102c DC |
284 | int ok = 0; |
285 | char op1[20], op2[20], comment1[40], comment2[40]; | |
246f4c05 SS |
286 | int sym_op1 = 0, sym_op2 = 0; |
287 | bfd_vma sym_addr1, sym_addr2; | |
adde6300 | 288 | |
af692060 | 289 | |
bab84c47 DC |
290 | if (!initialized) |
291 | { | |
11041102 KD |
292 | unsigned int nopcodes; |
293 | ||
af692060 NC |
294 | /* PR 4045: Try to avoid duplicating the 0x prefix that |
295 | objdump_print_addr() will put on addresses when there | |
296 | is no symbol table available. */ | |
297 | if (info->symtab_size == 0) | |
298 | comment_start = " "; | |
299 | ||
11041102 | 300 | nopcodes = sizeof (avr_opcodes) / sizeof (struct avr_opcodes_s); |
bab84c47 | 301 | |
47b0e7ad | 302 | avr_bin_masks = xmalloc (nopcodes * sizeof (unsigned int)); |
11041102 KD |
303 | |
304 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; | |
305 | opcode->name; | |
306 | opcode++, maskptr++) | |
bab84c47 DC |
307 | { |
308 | char * s; | |
309 | unsigned int bin = 0; | |
310 | unsigned int mask = 0; | |
311 | ||
312 | for (s = opcode->opcode; *s; ++s) | |
313 | { | |
314 | bin <<= 1; | |
315 | mask <<= 1; | |
316 | bin |= (*s == '1'); | |
317 | mask |= (*s == '1' || *s == '0'); | |
318 | } | |
319 | assert (s - opcode->opcode == 16); | |
320 | assert (opcode->bin_opcode == bin); | |
11041102 | 321 | *maskptr = mask; |
bab84c47 | 322 | } |
11041102 KD |
323 | |
324 | initialized = 1; | |
bab84c47 | 325 | } |
adde6300 | 326 | |
bab84c47 DC |
327 | insn = avrdis_opcode (addr, info); |
328 | ||
11041102 KD |
329 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; |
330 | opcode->name; | |
331 | opcode++, maskptr++) | |
47b0e7ad NC |
332 | if ((insn & *maskptr) == opcode->bin_opcode) |
333 | break; | |
bab84c47 | 334 | |
463f102c DC |
335 | /* Special case: disassemble `ldd r,b+0' as `ld r,b', and |
336 | `std b+0,r' as `st b,r' (next entry in the table). */ | |
337 | ||
338 | if (AVR_DISP0_P (insn)) | |
339 | opcode++; | |
340 | ||
341 | op1[0] = 0; | |
342 | op2[0] = 0; | |
343 | comment1[0] = 0; | |
344 | comment2[0] = 0; | |
345 | ||
bab84c47 | 346 | if (opcode->name) |
adde6300 | 347 | { |
8cc66334 EW |
348 | char *constraints = opcode->constraints; |
349 | char *opcode_str = opcode->opcode; | |
bab84c47 | 350 | |
00d2865b | 351 | insn2 = 0; |
463f102c | 352 | ok = 1; |
bab84c47 DC |
353 | |
354 | if (opcode->insn_size > 1) | |
355 | { | |
356 | insn2 = avrdis_opcode (addr + 2, info); | |
357 | cmd_len = 4; | |
358 | } | |
359 | ||
8cc66334 | 360 | if (*constraints && *constraints != '?') |
bab84c47 | 361 | { |
8cc66334 | 362 | int regs = REGISTER_P (*constraints); |
bab84c47 | 363 | |
8cc66334 | 364 | ok = avr_operand (insn, insn2, addr, *constraints, opcode_str, op1, comment1, 0, &sym_op1, &sym_addr1); |
bab84c47 | 365 | |
8cc66334 EW |
366 | if (ok && *(++constraints) == ',') |
367 | ok = avr_operand (insn, insn2, addr, *(++constraints), opcode_str, op2, | |
246f4c05 | 368 | *comment1 ? comment2 : comment1, regs, &sym_op2, &sym_addr2); |
bab84c47 | 369 | } |
463f102c | 370 | } |
bab84c47 | 371 | |
463f102c DC |
372 | if (!ok) |
373 | { | |
374 | /* Unknown opcode, or invalid combination of operands. */ | |
375 | sprintf (op1, "0x%04x", insn); | |
376 | op2[0] = 0; | |
377 | sprintf (comment1, "????"); | |
378 | comment2[0] = 0; | |
379 | } | |
bab84c47 | 380 | |
463f102c | 381 | (*prin) (stream, "%s", ok ? opcode->name : ".word"); |
bab84c47 | 382 | |
463f102c | 383 | if (*op1) |
246f4c05 | 384 | (*prin) (stream, "\t%s", op1); |
bab84c47 | 385 | |
463f102c DC |
386 | if (*op2) |
387 | (*prin) (stream, ", %s", op2); | |
388 | ||
389 | if (*comment1) | |
390 | (*prin) (stream, "\t; %s", comment1); | |
391 | ||
246f4c05 | 392 | if (sym_op1) |
73f643e9 | 393 | info->print_address_func (sym_addr1, info); |
246f4c05 | 394 | |
463f102c DC |
395 | if (*comment2) |
396 | (*prin) (stream, " %s", comment2); | |
bab84c47 | 397 | |
246f4c05 | 398 | if (sym_op2) |
73f643e9 | 399 | info->print_address_func (sym_addr2, info); |
246f4c05 | 400 | |
adde6300 AM |
401 | return cmd_len; |
402 | } |