Commit | Line | Data |
---|---|---|
adde6300 | 1 | /* Disassemble AVR instructions. |
219d1afa | 2 | Copyright (C) 1999-2018 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> |
88c1242d | 25 | #include "disassemble.h" |
adde6300 | 26 | #include "opintl.h" |
11041102 | 27 | #include "libiberty.h" |
0a7e1018 | 28 | #include "bfd_stdint.h" |
3c504221 | 29 | |
bab84c47 | 30 | struct avr_opcodes_s |
adde6300 | 31 | { |
bab84c47 DC |
32 | char *name; |
33 | char *constraints; | |
34 | char *opcode; | |
47b0e7ad | 35 | int insn_size; /* In words. */ |
bab84c47 DC |
36 | int isa; |
37 | unsigned int bin_opcode; | |
bab84c47 | 38 | }; |
adde6300 | 39 | |
bab84c47 | 40 | #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ |
11041102 | 41 | {#NAME, CONSTR, OPCODE, SIZE, ISA, BIN}, |
adde6300 | 42 | |
11041102 | 43 | const struct avr_opcodes_s avr_opcodes[] = |
adde6300 | 44 | { |
bab84c47 | 45 | #include "opcode/avr.h" |
11041102 | 46 | {NULL, NULL, NULL, 0, 0, 0} |
bab84c47 | 47 | }; |
adde6300 | 48 | |
af692060 NC |
49 | static const char * comment_start = "0x"; |
50 | ||
463f102c | 51 | static int |
246f4c05 | 52 | avr_operand (unsigned int insn, unsigned int insn2, unsigned int pc, int constraint, |
8cc66334 | 53 | char *opcode_str, char *buf, char *comment, int regs, int *sym, bfd_vma *sym_addr) |
adde6300 | 54 | { |
463f102c | 55 | int ok = 1; |
246f4c05 | 56 | *sym = 0; |
463f102c | 57 | |
bab84c47 DC |
58 | switch (constraint) |
59 | { | |
60 | /* Any register operand. */ | |
61 | case 'r': | |
62 | if (regs) | |
47b0e7ad | 63 | insn = (insn & 0xf) | ((insn & 0x0200) >> 5); /* Source register. */ |
bab84c47 | 64 | else |
47b0e7ad | 65 | insn = (insn & 0x01f0) >> 4; /* Destination register. */ |
43e65147 | 66 | |
bab84c47 DC |
67 | sprintf (buf, "r%d", insn); |
68 | break; | |
69 | ||
70 | case 'd': | |
71 | if (regs) | |
72 | sprintf (buf, "r%d", 16 + (insn & 0xf)); | |
73 | else | |
74 | sprintf (buf, "r%d", 16 + ((insn & 0xf0) >> 4)); | |
75 | break; | |
43e65147 | 76 | |
bab84c47 DC |
77 | case 'w': |
78 | sprintf (buf, "r%d", 24 + ((insn & 0x30) >> 3)); | |
79 | break; | |
43e65147 | 80 | |
bab84c47 DC |
81 | case 'a': |
82 | if (regs) | |
83 | sprintf (buf, "r%d", 16 + (insn & 7)); | |
84 | else | |
85 | sprintf (buf, "r%d", 16 + ((insn >> 4) & 7)); | |
86 | break; | |
adde6300 | 87 | |
bab84c47 DC |
88 | case 'v': |
89 | if (regs) | |
90 | sprintf (buf, "r%d", (insn & 0xf) * 2); | |
91 | else | |
92 | sprintf (buf, "r%d", ((insn & 0xf0) >> 3)); | |
93 | break; | |
94 | ||
95 | case 'e': | |
463f102c DC |
96 | { |
97 | char *xyz; | |
98 | ||
99 | switch (insn & 0x100f) | |
100 | { | |
101 | case 0x0000: xyz = "Z"; break; | |
102 | case 0x1001: xyz = "Z+"; break; | |
103 | case 0x1002: xyz = "-Z"; break; | |
104 | case 0x0008: xyz = "Y"; break; | |
105 | case 0x1009: xyz = "Y+"; break; | |
106 | case 0x100a: xyz = "-Y"; break; | |
107 | case 0x100c: xyz = "X"; break; | |
108 | case 0x100d: xyz = "X+"; break; | |
109 | case 0x100e: xyz = "-X"; break; | |
110 | default: xyz = "??"; ok = 0; | |
111 | } | |
c8941035 | 112 | strcpy (buf, xyz); |
463f102c DC |
113 | |
114 | if (AVR_UNDEF_P (insn)) | |
115 | sprintf (comment, _("undefined")); | |
116 | } | |
bab84c47 DC |
117 | break; |
118 | ||
119 | case 'z': | |
120 | *buf++ = 'Z'; | |
8cc66334 EW |
121 | |
122 | /* Check for post-increment. */ | |
123 | char *s; | |
124 | for (s = opcode_str; *s; ++s) | |
125 | { | |
126 | if (*s == '+') | |
127 | { | |
5d73b1f1 NC |
128 | if (insn & (1 << (15 - (s - opcode_str)))) |
129 | *buf++ = '+'; | |
8cc66334 EW |
130 | break; |
131 | } | |
132 | } | |
133 | ||
bab84c47 | 134 | *buf = '\0'; |
463f102c DC |
135 | if (AVR_UNDEF_P (insn)) |
136 | sprintf (comment, _("undefined")); | |
bab84c47 DC |
137 | break; |
138 | ||
139 | case 'b': | |
140 | { | |
463f102c | 141 | unsigned int x; |
43e65147 | 142 | |
bab84c47 DC |
143 | x = (insn & 7); |
144 | x |= (insn >> 7) & (3 << 3); | |
145 | x |= (insn >> 8) & (1 << 5); | |
43e65147 | 146 | |
bab84c47 DC |
147 | if (insn & 0x8) |
148 | *buf++ = 'Y'; | |
149 | else | |
150 | *buf++ = 'Z'; | |
151 | sprintf (buf, "+%d", x); | |
152 | sprintf (comment, "0x%02x", x); | |
153 | } | |
154 | break; | |
43e65147 | 155 | |
bab84c47 | 156 | case 'h': |
246f4c05 SS |
157 | *sym = 1; |
158 | *sym_addr = ((((insn & 1) | ((insn & 0x1f0) >> 3)) << 16) | insn2) * 2; | |
c4f5c3d7 | 159 | /* See PR binutils/2454. Ideally we would like to display the hex |
52f16a0e NC |
160 | value of the address only once, but this would mean recoding |
161 | objdump_print_address() which would affect many targets. */ | |
43e65147 | 162 | sprintf (buf, "%#lx", (unsigned long) *sym_addr); |
c8941035 | 163 | strcpy (comment, comment_start); |
bab84c47 | 164 | break; |
43e65147 | 165 | |
bab84c47 DC |
166 | case 'L': |
167 | { | |
168 | int rel_addr = (((insn & 0xfff) ^ 0x800) - 0x800) * 2; | |
169 | sprintf (buf, ".%+-8d", rel_addr); | |
246f4c05 SS |
170 | *sym = 1; |
171 | *sym_addr = pc + 2 + rel_addr; | |
c8941035 | 172 | strcpy (comment, comment_start); |
bab84c47 DC |
173 | } |
174 | break; | |
175 | ||
176 | case 'l': | |
177 | { | |
178 | int rel_addr = ((((insn >> 3) & 0x7f) ^ 0x40) - 0x40) * 2; | |
af692060 | 179 | |
bab84c47 | 180 | sprintf (buf, ".%+-8d", rel_addr); |
246f4c05 SS |
181 | *sym = 1; |
182 | *sym_addr = pc + 2 + rel_addr; | |
c8941035 | 183 | strcpy (comment, comment_start); |
bab84c47 DC |
184 | } |
185 | break; | |
186 | ||
187 | case 'i': | |
1857fe72 DC |
188 | { |
189 | unsigned int val = insn2 | 0x800000; | |
190 | *sym = 1; | |
191 | *sym_addr = val; | |
192 | sprintf (buf, "0x%04X", insn2); | |
193 | strcpy (comment, comment_start); | |
194 | } | |
bab84c47 | 195 | break; |
f36e8886 BS |
196 | |
197 | case 'j': | |
198 | { | |
199 | unsigned int val = ((insn & 0xf) | ((insn & 0x600) >> 5) | |
200 | | ((insn & 0x100) >> 2)); | |
1857fe72 DC |
201 | *sym = 1; |
202 | *sym_addr = val | 0x800000; | |
f36e8886 | 203 | sprintf (buf, "0x%02x", val); |
1857fe72 | 204 | strcpy (comment, comment_start); |
f36e8886 BS |
205 | } |
206 | break; | |
43e65147 | 207 | |
bab84c47 DC |
208 | case 'M': |
209 | sprintf (buf, "0x%02X", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
210 | sprintf (comment, "%d", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
211 | break; | |
212 | ||
213 | case 'n': | |
463f102c | 214 | sprintf (buf, "??"); |
a6743a54 AM |
215 | /* xgettext:c-format */ |
216 | opcodes_error_handler (_("internal disassembler error")); | |
463f102c | 217 | ok = 0; |
bab84c47 | 218 | break; |
43e65147 | 219 | |
bab84c47 | 220 | case 'K': |
463f102c DC |
221 | { |
222 | unsigned int x; | |
223 | ||
224 | x = (insn & 0xf) | ((insn >> 2) & 0x30); | |
225 | sprintf (buf, "0x%02x", x); | |
226 | sprintf (comment, "%d", x); | |
227 | } | |
bab84c47 | 228 | break; |
43e65147 | 229 | |
bab84c47 DC |
230 | case 's': |
231 | sprintf (buf, "%d", insn & 7); | |
232 | break; | |
43e65147 | 233 | |
bab84c47 DC |
234 | case 'S': |
235 | sprintf (buf, "%d", (insn >> 4) & 7); | |
236 | break; | |
43e65147 | 237 | |
bab84c47 DC |
238 | case 'P': |
239 | { | |
240 | unsigned int x; | |
47b0e7ad | 241 | |
bab84c47 DC |
242 | x = (insn & 0xf); |
243 | x |= (insn >> 5) & 0x30; | |
244 | sprintf (buf, "0x%02x", x); | |
245 | sprintf (comment, "%d", x); | |
246 | } | |
247 | break; | |
248 | ||
249 | case 'p': | |
250 | { | |
251 | unsigned int x; | |
43e65147 | 252 | |
bab84c47 DC |
253 | x = (insn >> 3) & 0x1f; |
254 | sprintf (buf, "0x%02x", x); | |
255 | sprintf (comment, "%d", x); | |
256 | } | |
257 | break; | |
43e65147 | 258 | |
8cc66334 EW |
259 | case 'E': |
260 | sprintf (buf, "%d", (insn >> 4) & 15); | |
261 | break; | |
43e65147 | 262 | |
bab84c47 DC |
263 | case '?': |
264 | *buf = '\0'; | |
265 | break; | |
43e65147 | 266 | |
bab84c47 | 267 | default: |
463f102c | 268 | sprintf (buf, "??"); |
a6743a54 AM |
269 | /* xgettext:c-format */ |
270 | opcodes_error_handler (_("unknown constraint `%c'"), constraint); | |
463f102c | 271 | ok = 0; |
bab84c47 | 272 | } |
463f102c DC |
273 | |
274 | return ok; | |
adde6300 AM |
275 | } |
276 | ||
0a7e1018 YQ |
277 | /* Read the opcode from ADDR. Return 0 in success and save opcode |
278 | in *INSN, otherwise, return -1. */ | |
279 | ||
280 | static int | |
281 | avrdis_opcode (bfd_vma addr, disassemble_info *info, uint16_t *insn) | |
adde6300 AM |
282 | { |
283 | bfd_byte buffer[2]; | |
284 | int status; | |
47b0e7ad NC |
285 | |
286 | status = info->read_memory_func (addr, buffer, 2, info); | |
287 | ||
288 | if (status == 0) | |
0a7e1018 YQ |
289 | { |
290 | *insn = bfd_getl16 (buffer); | |
291 | return 0; | |
292 | } | |
47b0e7ad NC |
293 | |
294 | info->memory_error_func (status, addr, info); | |
295 | return -1; | |
adde6300 AM |
296 | } |
297 | ||
298 | ||
299 | int | |
47b0e7ad | 300 | print_insn_avr (bfd_vma addr, disassemble_info *info) |
adde6300 | 301 | { |
0a7e1018 | 302 | uint16_t insn, insn2; |
11041102 KD |
303 | const struct avr_opcodes_s *opcode; |
304 | static unsigned int *maskptr; | |
adde6300 AM |
305 | void *stream = info->stream; |
306 | fprintf_ftype prin = info->fprintf_func; | |
11041102 | 307 | static unsigned int *avr_bin_masks; |
bab84c47 | 308 | static int initialized; |
adde6300 | 309 | int cmd_len = 2; |
463f102c DC |
310 | int ok = 0; |
311 | char op1[20], op2[20], comment1[40], comment2[40]; | |
246f4c05 SS |
312 | int sym_op1 = 0, sym_op2 = 0; |
313 | bfd_vma sym_addr1, sym_addr2; | |
adde6300 | 314 | |
af692060 | 315 | |
bab84c47 DC |
316 | if (!initialized) |
317 | { | |
11041102 KD |
318 | unsigned int nopcodes; |
319 | ||
af692060 NC |
320 | /* PR 4045: Try to avoid duplicating the 0x prefix that |
321 | objdump_print_addr() will put on addresses when there | |
322 | is no symbol table available. */ | |
323 | if (info->symtab_size == 0) | |
324 | comment_start = " "; | |
325 | ||
11041102 | 326 | nopcodes = sizeof (avr_opcodes) / sizeof (struct avr_opcodes_s); |
43e65147 | 327 | |
47b0e7ad | 328 | avr_bin_masks = xmalloc (nopcodes * sizeof (unsigned int)); |
11041102 KD |
329 | |
330 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; | |
331 | opcode->name; | |
332 | opcode++, maskptr++) | |
bab84c47 DC |
333 | { |
334 | char * s; | |
335 | unsigned int bin = 0; | |
336 | unsigned int mask = 0; | |
43e65147 | 337 | |
bab84c47 DC |
338 | for (s = opcode->opcode; *s; ++s) |
339 | { | |
340 | bin <<= 1; | |
341 | mask <<= 1; | |
342 | bin |= (*s == '1'); | |
343 | mask |= (*s == '1' || *s == '0'); | |
344 | } | |
345 | assert (s - opcode->opcode == 16); | |
346 | assert (opcode->bin_opcode == bin); | |
11041102 | 347 | *maskptr = mask; |
bab84c47 | 348 | } |
11041102 KD |
349 | |
350 | initialized = 1; | |
bab84c47 | 351 | } |
adde6300 | 352 | |
0a7e1018 YQ |
353 | if (avrdis_opcode (addr, info, &insn) != 0) |
354 | return -1; | |
43e65147 | 355 | |
11041102 KD |
356 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; |
357 | opcode->name; | |
358 | opcode++, maskptr++) | |
f36e8886 BS |
359 | { |
360 | if ((opcode->isa == AVR_ISA_TINY) && (info->mach != bfd_mach_avrtiny)) | |
361 | continue; | |
362 | if ((insn & *maskptr) == opcode->bin_opcode) | |
363 | break; | |
364 | } | |
43e65147 | 365 | |
463f102c DC |
366 | /* Special case: disassemble `ldd r,b+0' as `ld r,b', and |
367 | `std b+0,r' as `st b,r' (next entry in the table). */ | |
368 | ||
369 | if (AVR_DISP0_P (insn)) | |
370 | opcode++; | |
371 | ||
372 | op1[0] = 0; | |
373 | op2[0] = 0; | |
374 | comment1[0] = 0; | |
375 | comment2[0] = 0; | |
376 | ||
bab84c47 | 377 | if (opcode->name) |
adde6300 | 378 | { |
8cc66334 EW |
379 | char *constraints = opcode->constraints; |
380 | char *opcode_str = opcode->opcode; | |
bab84c47 | 381 | |
00d2865b | 382 | insn2 = 0; |
463f102c | 383 | ok = 1; |
bab84c47 DC |
384 | |
385 | if (opcode->insn_size > 1) | |
386 | { | |
0a7e1018 YQ |
387 | if (avrdis_opcode (addr + 2, info, &insn2) != 0) |
388 | return -1; | |
bab84c47 DC |
389 | cmd_len = 4; |
390 | } | |
391 | ||
8cc66334 | 392 | if (*constraints && *constraints != '?') |
bab84c47 | 393 | { |
8cc66334 | 394 | int regs = REGISTER_P (*constraints); |
bab84c47 | 395 | |
8cc66334 | 396 | ok = avr_operand (insn, insn2, addr, *constraints, opcode_str, op1, comment1, 0, &sym_op1, &sym_addr1); |
bab84c47 | 397 | |
8cc66334 EW |
398 | if (ok && *(++constraints) == ',') |
399 | ok = avr_operand (insn, insn2, addr, *(++constraints), opcode_str, op2, | |
246f4c05 | 400 | *comment1 ? comment2 : comment1, regs, &sym_op2, &sym_addr2); |
bab84c47 | 401 | } |
463f102c | 402 | } |
bab84c47 | 403 | |
463f102c DC |
404 | if (!ok) |
405 | { | |
406 | /* Unknown opcode, or invalid combination of operands. */ | |
407 | sprintf (op1, "0x%04x", insn); | |
408 | op2[0] = 0; | |
409 | sprintf (comment1, "????"); | |
410 | comment2[0] = 0; | |
411 | } | |
bab84c47 | 412 | |
463f102c | 413 | (*prin) (stream, "%s", ok ? opcode->name : ".word"); |
bab84c47 | 414 | |
463f102c | 415 | if (*op1) |
246f4c05 | 416 | (*prin) (stream, "\t%s", op1); |
bab84c47 | 417 | |
463f102c DC |
418 | if (*op2) |
419 | (*prin) (stream, ", %s", op2); | |
420 | ||
421 | if (*comment1) | |
422 | (*prin) (stream, "\t; %s", comment1); | |
423 | ||
246f4c05 | 424 | if (sym_op1) |
73f643e9 | 425 | info->print_address_func (sym_addr1, info); |
246f4c05 | 426 | |
463f102c DC |
427 | if (*comment2) |
428 | (*prin) (stream, " %s", comment2); | |
bab84c47 | 429 | |
246f4c05 | 430 | if (sym_op2) |
73f643e9 | 431 | info->print_address_func (sym_addr2, info); |
246f4c05 | 432 | |
adde6300 AM |
433 | return cmd_len; |
434 | } |