Commit | Line | Data |
---|---|---|
adde6300 | 1 | /* Disassemble AVR instructions. |
00988f49 AM |
2 | Copyright 1999, 2000, 2002, 2004, 2005, 2006 |
3 | Free Software Foundation, Inc. | |
adde6300 AM |
4 | |
5 | Contributed by Denis Chertykov <denisc@overta.ru> | |
6 | ||
47b0e7ad NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
adde6300 | 11 | |
47b0e7ad NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
adde6300 | 16 | |
47b0e7ad NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ | |
adde6300 | 20 | |
bab84c47 | 21 | #include <assert.h> |
0d8dfecf | 22 | #include "sysdep.h" |
adde6300 AM |
23 | #include "dis-asm.h" |
24 | #include "opintl.h" | |
11041102 | 25 | #include "libiberty.h" |
3c504221 | 26 | |
bab84c47 | 27 | struct avr_opcodes_s |
adde6300 | 28 | { |
bab84c47 DC |
29 | char *name; |
30 | char *constraints; | |
31 | char *opcode; | |
47b0e7ad | 32 | int insn_size; /* In words. */ |
bab84c47 DC |
33 | int isa; |
34 | unsigned int bin_opcode; | |
bab84c47 | 35 | }; |
adde6300 | 36 | |
bab84c47 | 37 | #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ |
11041102 | 38 | {#NAME, CONSTR, OPCODE, SIZE, ISA, BIN}, |
adde6300 | 39 | |
11041102 | 40 | const struct avr_opcodes_s avr_opcodes[] = |
adde6300 | 41 | { |
bab84c47 | 42 | #include "opcode/avr.h" |
11041102 | 43 | {NULL, NULL, NULL, 0, 0, 0} |
bab84c47 | 44 | }; |
adde6300 | 45 | |
af692060 NC |
46 | static const char * comment_start = "0x"; |
47 | ||
463f102c | 48 | static int |
246f4c05 SS |
49 | avr_operand (unsigned int insn, unsigned int insn2, unsigned int pc, int constraint, |
50 | char *buf, char *comment, int regs, int *sym, bfd_vma *sym_addr) | |
adde6300 | 51 | { |
463f102c | 52 | int ok = 1; |
246f4c05 | 53 | *sym = 0; |
463f102c | 54 | |
bab84c47 DC |
55 | switch (constraint) |
56 | { | |
57 | /* Any register operand. */ | |
58 | case 'r': | |
59 | if (regs) | |
47b0e7ad | 60 | insn = (insn & 0xf) | ((insn & 0x0200) >> 5); /* Source register. */ |
bab84c47 | 61 | else |
47b0e7ad | 62 | insn = (insn & 0x01f0) >> 4; /* Destination register. */ |
bab84c47 DC |
63 | |
64 | sprintf (buf, "r%d", insn); | |
65 | break; | |
66 | ||
67 | case 'd': | |
68 | if (regs) | |
69 | sprintf (buf, "r%d", 16 + (insn & 0xf)); | |
70 | else | |
71 | sprintf (buf, "r%d", 16 + ((insn & 0xf0) >> 4)); | |
72 | break; | |
73 | ||
74 | case 'w': | |
75 | sprintf (buf, "r%d", 24 + ((insn & 0x30) >> 3)); | |
76 | break; | |
77 | ||
78 | case 'a': | |
79 | if (regs) | |
80 | sprintf (buf, "r%d", 16 + (insn & 7)); | |
81 | else | |
82 | sprintf (buf, "r%d", 16 + ((insn >> 4) & 7)); | |
83 | break; | |
adde6300 | 84 | |
bab84c47 DC |
85 | case 'v': |
86 | if (regs) | |
87 | sprintf (buf, "r%d", (insn & 0xf) * 2); | |
88 | else | |
89 | sprintf (buf, "r%d", ((insn & 0xf0) >> 3)); | |
90 | break; | |
91 | ||
92 | case 'e': | |
463f102c DC |
93 | { |
94 | char *xyz; | |
95 | ||
96 | switch (insn & 0x100f) | |
97 | { | |
98 | case 0x0000: xyz = "Z"; break; | |
99 | case 0x1001: xyz = "Z+"; break; | |
100 | case 0x1002: xyz = "-Z"; break; | |
101 | case 0x0008: xyz = "Y"; break; | |
102 | case 0x1009: xyz = "Y+"; break; | |
103 | case 0x100a: xyz = "-Y"; break; | |
104 | case 0x100c: xyz = "X"; break; | |
105 | case 0x100d: xyz = "X+"; break; | |
106 | case 0x100e: xyz = "-X"; break; | |
107 | default: xyz = "??"; ok = 0; | |
108 | } | |
109 | sprintf (buf, xyz); | |
110 | ||
111 | if (AVR_UNDEF_P (insn)) | |
112 | sprintf (comment, _("undefined")); | |
113 | } | |
bab84c47 DC |
114 | break; |
115 | ||
116 | case 'z': | |
117 | *buf++ = 'Z'; | |
118 | if (insn & 0x1) | |
119 | *buf++ = '+'; | |
120 | *buf = '\0'; | |
463f102c DC |
121 | if (AVR_UNDEF_P (insn)) |
122 | sprintf (comment, _("undefined")); | |
bab84c47 DC |
123 | break; |
124 | ||
125 | case 'b': | |
126 | { | |
463f102c | 127 | unsigned int x; |
bab84c47 DC |
128 | |
129 | x = (insn & 7); | |
130 | x |= (insn >> 7) & (3 << 3); | |
131 | x |= (insn >> 8) & (1 << 5); | |
132 | ||
133 | if (insn & 0x8) | |
134 | *buf++ = 'Y'; | |
135 | else | |
136 | *buf++ = 'Z'; | |
137 | sprintf (buf, "+%d", x); | |
138 | sprintf (comment, "0x%02x", x); | |
139 | } | |
140 | break; | |
141 | ||
142 | case 'h': | |
246f4c05 SS |
143 | *sym = 1; |
144 | *sym_addr = ((((insn & 1) | ((insn & 0x1f0) >> 3)) << 16) | insn2) * 2; | |
c4f5c3d7 | 145 | /* See PR binutils/2454. Ideally we would like to display the hex |
52f16a0e NC |
146 | value of the address only once, but this would mean recoding |
147 | objdump_print_address() which would affect many targets. */ | |
00988f49 | 148 | sprintf (buf, "%#lx", (unsigned long) *sym_addr); |
af692060 | 149 | sprintf (comment, comment_start); |
bab84c47 DC |
150 | break; |
151 | ||
152 | case 'L': | |
153 | { | |
154 | int rel_addr = (((insn & 0xfff) ^ 0x800) - 0x800) * 2; | |
155 | sprintf (buf, ".%+-8d", rel_addr); | |
246f4c05 SS |
156 | *sym = 1; |
157 | *sym_addr = pc + 2 + rel_addr; | |
af692060 | 158 | sprintf (comment, comment_start); |
bab84c47 DC |
159 | } |
160 | break; | |
161 | ||
162 | case 'l': | |
163 | { | |
164 | int rel_addr = ((((insn >> 3) & 0x7f) ^ 0x40) - 0x40) * 2; | |
af692060 | 165 | |
bab84c47 | 166 | sprintf (buf, ".%+-8d", rel_addr); |
246f4c05 SS |
167 | *sym = 1; |
168 | *sym_addr = pc + 2 + rel_addr; | |
af692060 | 169 | sprintf (comment, comment_start); |
bab84c47 DC |
170 | } |
171 | break; | |
172 | ||
173 | case 'i': | |
174 | sprintf (buf, "0x%04X", insn2); | |
175 | break; | |
176 | ||
177 | case 'M': | |
178 | sprintf (buf, "0x%02X", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
179 | sprintf (comment, "%d", ((insn & 0xf00) >> 4) | (insn & 0xf)); | |
180 | break; | |
181 | ||
182 | case 'n': | |
463f102c DC |
183 | sprintf (buf, "??"); |
184 | fprintf (stderr, _("Internal disassembler error")); | |
185 | ok = 0; | |
bab84c47 DC |
186 | break; |
187 | ||
188 | case 'K': | |
463f102c DC |
189 | { |
190 | unsigned int x; | |
191 | ||
192 | x = (insn & 0xf) | ((insn >> 2) & 0x30); | |
193 | sprintf (buf, "0x%02x", x); | |
194 | sprintf (comment, "%d", x); | |
195 | } | |
bab84c47 DC |
196 | break; |
197 | ||
198 | case 's': | |
199 | sprintf (buf, "%d", insn & 7); | |
200 | break; | |
201 | ||
202 | case 'S': | |
203 | sprintf (buf, "%d", (insn >> 4) & 7); | |
204 | break; | |
205 | ||
206 | case 'P': | |
207 | { | |
208 | unsigned int x; | |
47b0e7ad | 209 | |
bab84c47 DC |
210 | x = (insn & 0xf); |
211 | x |= (insn >> 5) & 0x30; | |
212 | sprintf (buf, "0x%02x", x); | |
213 | sprintf (comment, "%d", x); | |
214 | } | |
215 | break; | |
216 | ||
217 | case 'p': | |
218 | { | |
219 | unsigned int x; | |
220 | ||
221 | x = (insn >> 3) & 0x1f; | |
222 | sprintf (buf, "0x%02x", x); | |
223 | sprintf (comment, "%d", x); | |
224 | } | |
225 | break; | |
226 | ||
227 | case '?': | |
228 | *buf = '\0'; | |
229 | break; | |
230 | ||
231 | default: | |
463f102c DC |
232 | sprintf (buf, "??"); |
233 | fprintf (stderr, _("unknown constraint `%c'"), constraint); | |
234 | ok = 0; | |
bab84c47 | 235 | } |
463f102c DC |
236 | |
237 | return ok; | |
adde6300 AM |
238 | } |
239 | ||
bab84c47 | 240 | static unsigned short |
47b0e7ad | 241 | avrdis_opcode (bfd_vma addr, disassemble_info *info) |
adde6300 AM |
242 | { |
243 | bfd_byte buffer[2]; | |
244 | int status; | |
47b0e7ad NC |
245 | |
246 | status = info->read_memory_func (addr, buffer, 2, info); | |
247 | ||
248 | if (status == 0) | |
249 | return bfd_getl16 (buffer); | |
250 | ||
251 | info->memory_error_func (status, addr, info); | |
252 | return -1; | |
adde6300 AM |
253 | } |
254 | ||
255 | ||
256 | int | |
47b0e7ad | 257 | print_insn_avr (bfd_vma addr, disassemble_info *info) |
adde6300 | 258 | { |
bab84c47 | 259 | unsigned int insn, insn2; |
11041102 KD |
260 | const struct avr_opcodes_s *opcode; |
261 | static unsigned int *maskptr; | |
adde6300 AM |
262 | void *stream = info->stream; |
263 | fprintf_ftype prin = info->fprintf_func; | |
11041102 | 264 | static unsigned int *avr_bin_masks; |
bab84c47 | 265 | static int initialized; |
adde6300 | 266 | int cmd_len = 2; |
463f102c DC |
267 | int ok = 0; |
268 | char op1[20], op2[20], comment1[40], comment2[40]; | |
246f4c05 SS |
269 | int sym_op1 = 0, sym_op2 = 0; |
270 | bfd_vma sym_addr1, sym_addr2; | |
adde6300 | 271 | |
af692060 | 272 | |
bab84c47 DC |
273 | if (!initialized) |
274 | { | |
11041102 KD |
275 | unsigned int nopcodes; |
276 | ||
af692060 NC |
277 | /* PR 4045: Try to avoid duplicating the 0x prefix that |
278 | objdump_print_addr() will put on addresses when there | |
279 | is no symbol table available. */ | |
280 | if (info->symtab_size == 0) | |
281 | comment_start = " "; | |
282 | ||
11041102 | 283 | nopcodes = sizeof (avr_opcodes) / sizeof (struct avr_opcodes_s); |
bab84c47 | 284 | |
47b0e7ad | 285 | avr_bin_masks = xmalloc (nopcodes * sizeof (unsigned int)); |
11041102 KD |
286 | |
287 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; | |
288 | opcode->name; | |
289 | opcode++, maskptr++) | |
bab84c47 DC |
290 | { |
291 | char * s; | |
292 | unsigned int bin = 0; | |
293 | unsigned int mask = 0; | |
294 | ||
295 | for (s = opcode->opcode; *s; ++s) | |
296 | { | |
297 | bin <<= 1; | |
298 | mask <<= 1; | |
299 | bin |= (*s == '1'); | |
300 | mask |= (*s == '1' || *s == '0'); | |
301 | } | |
302 | assert (s - opcode->opcode == 16); | |
303 | assert (opcode->bin_opcode == bin); | |
11041102 | 304 | *maskptr = mask; |
bab84c47 | 305 | } |
11041102 KD |
306 | |
307 | initialized = 1; | |
bab84c47 | 308 | } |
adde6300 | 309 | |
bab84c47 DC |
310 | insn = avrdis_opcode (addr, info); |
311 | ||
11041102 KD |
312 | for (opcode = avr_opcodes, maskptr = avr_bin_masks; |
313 | opcode->name; | |
314 | opcode++, maskptr++) | |
47b0e7ad NC |
315 | if ((insn & *maskptr) == opcode->bin_opcode) |
316 | break; | |
bab84c47 | 317 | |
463f102c DC |
318 | /* Special case: disassemble `ldd r,b+0' as `ld r,b', and |
319 | `std b+0,r' as `st b,r' (next entry in the table). */ | |
320 | ||
321 | if (AVR_DISP0_P (insn)) | |
322 | opcode++; | |
323 | ||
324 | op1[0] = 0; | |
325 | op2[0] = 0; | |
326 | comment1[0] = 0; | |
327 | comment2[0] = 0; | |
328 | ||
bab84c47 | 329 | if (opcode->name) |
adde6300 | 330 | { |
bab84c47 DC |
331 | char *op = opcode->constraints; |
332 | ||
00d2865b | 333 | insn2 = 0; |
463f102c | 334 | ok = 1; |
bab84c47 DC |
335 | |
336 | if (opcode->insn_size > 1) | |
337 | { | |
338 | insn2 = avrdis_opcode (addr + 2, info); | |
339 | cmd_len = 4; | |
340 | } | |
341 | ||
342 | if (*op && *op != '?') | |
343 | { | |
344 | int regs = REGISTER_P (*op); | |
345 | ||
246f4c05 | 346 | ok = avr_operand (insn, insn2, addr, *op, op1, comment1, 0, &sym_op1, &sym_addr1); |
bab84c47 | 347 | |
463f102c DC |
348 | if (ok && *(++op) == ',') |
349 | ok = avr_operand (insn, insn2, addr, *(++op), op2, | |
246f4c05 | 350 | *comment1 ? comment2 : comment1, regs, &sym_op2, &sym_addr2); |
bab84c47 | 351 | } |
463f102c | 352 | } |
bab84c47 | 353 | |
463f102c DC |
354 | if (!ok) |
355 | { | |
356 | /* Unknown opcode, or invalid combination of operands. */ | |
357 | sprintf (op1, "0x%04x", insn); | |
358 | op2[0] = 0; | |
359 | sprintf (comment1, "????"); | |
360 | comment2[0] = 0; | |
361 | } | |
bab84c47 | 362 | |
463f102c | 363 | (*prin) (stream, "%s", ok ? opcode->name : ".word"); |
bab84c47 | 364 | |
463f102c | 365 | if (*op1) |
246f4c05 | 366 | (*prin) (stream, "\t%s", op1); |
bab84c47 | 367 | |
463f102c DC |
368 | if (*op2) |
369 | (*prin) (stream, ", %s", op2); | |
370 | ||
371 | if (*comment1) | |
372 | (*prin) (stream, "\t; %s", comment1); | |
373 | ||
246f4c05 | 374 | if (sym_op1) |
73f643e9 | 375 | info->print_address_func (sym_addr1, info); |
246f4c05 | 376 | |
463f102c DC |
377 | if (*comment2) |
378 | (*prin) (stream, " %s", comment2); | |
bab84c47 | 379 | |
246f4c05 | 380 | if (sym_op2) |
73f643e9 | 381 | info->print_address_func (sym_addr2, info); |
246f4c05 | 382 | |
adde6300 AM |
383 | return cmd_len; |
384 | } |