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Add support for attiny261, attiny461, attiny861, attiny25, attiny45,
[deliverable/binutils-gdb.git] / gas / config / tc-avr.c
1 /* tc-avr.c -- Assembler code for the ATMEL AVR
2
3 Copyright 1999, 2000, 2001, 2002, 2004, 2005, 2006
4 Free Software Foundation, Inc.
5 Contributed by Denis Chertykov <denisc@overta.ru>
6
7 This file is part of GAS, the GNU Assembler.
8
9 GAS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
12 any later version.
13
14 GAS is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with GAS; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24 #include <stdio.h>
25 #include "as.h"
26 #include "safe-ctype.h"
27 #include "subsegs.h"
28 #include "libiberty.h"
29
30 struct avr_opcodes_s
31 {
32 char * name;
33 char * constraints;
34 int insn_size; /* In words. */
35 int isa;
36 unsigned int bin_opcode;
37 };
38
39 #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
40 {#NAME, CONSTR, SIZE, ISA, BIN},
41
42 struct avr_opcodes_s avr_opcodes[] =
43 {
44 #include "opcode/avr.h"
45 {NULL, NULL, 0, 0, 0}
46 };
47
48 const char comment_chars[] = ";";
49 const char line_comment_chars[] = "#";
50 const char line_separator_chars[] = "$";
51
52 const char *md_shortopts = "m:";
53 struct mcu_type_s
54 {
55 char *name;
56 int isa;
57 int mach;
58 };
59
60 /* XXX - devices that don't seem to exist (renamed, replaced with larger
61 ones, or planned but never produced), left here for compatibility.
62 TODO: hide them in show_mcu_list output? */
63
64 static struct mcu_type_s mcu_types[] =
65 {
66 {"avr1", AVR_ISA_TINY1, bfd_mach_avr1},
67 {"avr2", AVR_ISA_TINY2, bfd_mach_avr2},
68 {"avr3", AVR_ISA_M103, bfd_mach_avr3},
69 {"avr4", AVR_ISA_M8, bfd_mach_avr4},
70 {"avr5", AVR_ISA_ALL, bfd_mach_avr5},
71 {"at90s1200", AVR_ISA_1200, bfd_mach_avr1},
72 {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */
73 {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1},
74 {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1},
75 {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1},
76 {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1},
77 {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2},
78 {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2},
79 {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */
80 {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2},
81 {"attiny22", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 2343 */
82 {"attiny26", AVR_ISA_2xxx, bfd_mach_avr2},
83 {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2},
84 {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */
85 {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */
86 {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2},
87 {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2},
88 {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2},
89 {"at86rf401", AVR_ISA_2xxx, bfd_mach_avr2},
90 {"attiny13", AVR_ISA_TINY2, bfd_mach_avr2},
91 {"attiny2313",AVR_ISA_TINY2, bfd_mach_avr2},
92 {"attiny261", AVR_ISA_TINY2, bfd_mach_avr2},
93 {"attiny461", AVR_ISA_TINY2, bfd_mach_avr2},
94 {"attiny861", AVR_ISA_TINY2, bfd_mach_avr2},
95 {"attiny24", AVR_ISA_TINY2, bfd_mach_avr2},
96 {"attiny44", AVR_ISA_TINY2, bfd_mach_avr2},
97 {"attiny84", AVR_ISA_TINY2, bfd_mach_avr2},
98 {"attiny25", AVR_ISA_TINY2, bfd_mach_avr2},
99 {"attiny45", AVR_ISA_TINY2, bfd_mach_avr2},
100 {"attiny85", AVR_ISA_TINY2, bfd_mach_avr2},
101 {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */
102 {"atmega103", AVR_ISA_M103, bfd_mach_avr3},
103 {"at43usb320",AVR_ISA_M103, bfd_mach_avr3},
104 {"at43usb355",AVR_ISA_M603, bfd_mach_avr3},
105 {"at76c711", AVR_ISA_M603, bfd_mach_avr3},
106 {"atmega48", AVR_ISA_PWMx, bfd_mach_avr4},
107 {"atmega8", AVR_ISA_M8, bfd_mach_avr4},
108 {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8535 */
109 {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */
110 {"atmega88", AVR_ISA_PWMx, bfd_mach_avr4},
111 {"atmega8515",AVR_ISA_M8, bfd_mach_avr4},
112 {"atmega8535",AVR_ISA_M8, bfd_mach_avr4},
113 {"at90pwm2", AVR_ISA_PWMx, bfd_mach_avr4},
114 {"at90pwm3", AVR_ISA_PWMx, bfd_mach_avr4},
115 {"atmega16", AVR_ISA_M323, bfd_mach_avr5},
116 {"atmega161", AVR_ISA_M161, bfd_mach_avr5},
117 {"atmega162", AVR_ISA_M323, bfd_mach_avr5},
118 {"atmega163", AVR_ISA_M161, bfd_mach_avr5},
119 {"atmega164", AVR_ISA_M323, bfd_mach_avr5},
120 {"atmega165", AVR_ISA_M323, bfd_mach_avr5},
121 {"atmega168", AVR_ISA_M323, bfd_mach_avr5},
122 {"atmega169", AVR_ISA_M323, bfd_mach_avr5},
123 {"atmega32", AVR_ISA_M323, bfd_mach_avr5},
124 {"atmega323", AVR_ISA_M323, bfd_mach_avr5},
125 {"atmega324", AVR_ISA_M323, bfd_mach_avr5},
126 {"atmega325", AVR_ISA_M323, bfd_mach_avr5},
127 {"atmega329", AVR_ISA_M323, bfd_mach_avr5},
128 {"atmega3250",AVR_ISA_M323, bfd_mach_avr5},
129 {"atmega3290",AVR_ISA_M323, bfd_mach_avr5},
130 {"atmega406", AVR_ISA_M323, bfd_mach_avr5},
131 {"atmega64", AVR_ISA_M323, bfd_mach_avr5},
132 {"atmega640", AVR_ISA_M323, bfd_mach_avr5},
133 {"atmega644", AVR_ISA_M323, bfd_mach_avr5},
134 {"atmega128", AVR_ISA_M128, bfd_mach_avr5},
135 {"atmega1280",AVR_ISA_M128, bfd_mach_avr5},
136 {"atmega1281",AVR_ISA_M128, bfd_mach_avr5},
137 {"atmega645", AVR_ISA_M323, bfd_mach_avr5},
138 {"atmega649", AVR_ISA_M323, bfd_mach_avr5},
139 {"atmega6450",AVR_ISA_M323, bfd_mach_avr5},
140 {"atmega6490",AVR_ISA_M323, bfd_mach_avr5},
141 {"at90can32" ,AVR_ISA_M323, bfd_mach_avr5},
142 {"at90can64" ,AVR_ISA_M323, bfd_mach_avr5},
143 {"at90can128",AVR_ISA_M128, bfd_mach_avr5},
144 {"at90usb646", AVR_ISA_M323, bfd_mach_avr5},
145 {"at90usb647", AVR_ISA_M323, bfd_mach_avr5},
146 {"at90usb1286",AVR_ISA_M128, bfd_mach_avr5},
147 {"at90usb1287",AVR_ISA_M128, bfd_mach_avr5},
148 {"at94k", AVR_ISA_94K, bfd_mach_avr5},
149 {NULL, 0, 0}
150 };
151
152 /* Current MCU type. */
153 static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2};
154 static struct mcu_type_s * avr_mcu = & default_mcu;
155
156 /* AVR target-specific switches. */
157 struct avr_opt_s
158 {
159 int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes. */
160 int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns. */
161 int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around. */
162 };
163
164 static struct avr_opt_s avr_opt = { 0, 0, 0 };
165
166 const char EXP_CHARS[] = "eE";
167 const char FLT_CHARS[] = "dD";
168
169 static void avr_set_arch (int);
170
171 /* The target specific pseudo-ops which we support. */
172 const pseudo_typeS md_pseudo_table[] =
173 {
174 {"arch", avr_set_arch, 0},
175 { NULL, NULL, 0}
176 };
177
178 #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
179
180 #define EXP_MOD_NAME(i) exp_mod[i].name
181 #define EXP_MOD_RELOC(i) exp_mod[i].reloc
182 #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc
183 #define HAVE_PM_P(i) exp_mod[i].have_pm
184
185 struct exp_mod_s
186 {
187 char * name;
188 bfd_reloc_code_real_type reloc;
189 bfd_reloc_code_real_type neg_reloc;
190 int have_pm;
191 };
192
193 static struct exp_mod_s exp_mod[] =
194 {
195 {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1},
196 {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0},
197 {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1},
198 {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0},
199 {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1},
200 {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0},
201 {"hlo8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 0},
202 {"hhi8", BFD_RELOC_AVR_MS8_LDI, BFD_RELOC_AVR_MS8_LDI_NEG, 0},
203 };
204
205 /* A union used to store indicies into the exp_mod[] array
206 in a hash table which expects void * data types. */
207 typedef union
208 {
209 void * ptr;
210 int index;
211 } mod_index;
212
213 /* Opcode hash table. */
214 static struct hash_control *avr_hash;
215
216 /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
217 static struct hash_control *avr_mod_hash;
218
219 #define OPTION_MMCU 'm'
220 enum options
221 {
222 OPTION_ALL_OPCODES = OPTION_MD_BASE + 1,
223 OPTION_NO_SKIP_BUG,
224 OPTION_NO_WRAP
225 };
226
227 struct option md_longopts[] =
228 {
229 { "mmcu", required_argument, NULL, OPTION_MMCU },
230 { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
231 { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
232 { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP },
233 { NULL, no_argument, NULL, 0 }
234 };
235
236 size_t md_longopts_size = sizeof (md_longopts);
237
238 /* Display nicely formatted list of known MCU names. */
239
240 static void
241 show_mcu_list (FILE *stream)
242 {
243 int i, x;
244
245 fprintf (stream, _("Known MCU names:"));
246 x = 1000;
247
248 for (i = 0; mcu_types[i].name; i++)
249 {
250 int len = strlen (mcu_types[i].name);
251
252 x += len + 1;
253
254 if (x < 75)
255 fprintf (stream, " %s", mcu_types[i].name);
256 else
257 {
258 fprintf (stream, "\n %s", mcu_types[i].name);
259 x = len + 2;
260 }
261 }
262
263 fprintf (stream, "\n");
264 }
265
266 static inline char *
267 skip_space (char *s)
268 {
269 while (*s == ' ' || *s == '\t')
270 ++s;
271 return s;
272 }
273
274 /* Extract one word from FROM and copy it to TO. */
275
276 static char *
277 extract_word (char *from, char *to, int limit)
278 {
279 char *op_start;
280 char *op_end;
281 int size = 0;
282
283 /* Drop leading whitespace. */
284 from = skip_space (from);
285 *to = 0;
286
287 /* Find the op code end. */
288 for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
289 {
290 to[size++] = *op_end++;
291 if (size + 1 >= limit)
292 break;
293 }
294
295 to[size] = 0;
296 return op_end;
297 }
298
299 int
300 md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED,
301 asection *seg ATTRIBUTE_UNUSED)
302 {
303 abort ();
304 return 0;
305 }
306
307 void
308 md_show_usage (FILE *stream)
309 {
310 fprintf (stream,
311 _("AVR options:\n"
312 " -mmcu=[avr-name] select microcontroller variant\n"
313 " [avr-name] can be:\n"
314 " avr1 - AT90S1200, ATtiny1x, ATtiny28\n"
315 " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n"
316 " avr3 - ATmega103, ATmega603\n"
317 " avr4 - ATmega83, ATmega85\n"
318 " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n"
319 " or immediate microcontroller name.\n"));
320 fprintf (stream,
321 _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n"
322 " -mno-skip-bug disable warnings for skipping two-word instructions\n"
323 " (default for avr4, avr5)\n"
324 " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n"
325 " (default for avr3, avr5)\n"));
326 show_mcu_list (stream);
327 }
328
329 static void
330 avr_set_arch (int dummy ATTRIBUTE_UNUSED)
331 {
332 char str[20];
333
334 input_line_pointer = extract_word (input_line_pointer, str, 20);
335 md_parse_option (OPTION_MMCU, str);
336 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
337 }
338
339 int
340 md_parse_option (int c, char *arg)
341 {
342 switch (c)
343 {
344 case OPTION_MMCU:
345 {
346 int i;
347 char *s = alloca (strlen (arg) + 1);
348
349 {
350 char *t = s;
351 char *arg1 = arg;
352
353 do
354 *t = TOLOWER (*arg1++);
355 while (*t++);
356 }
357
358 for (i = 0; mcu_types[i].name; ++i)
359 if (strcmp (mcu_types[i].name, s) == 0)
360 break;
361
362 if (!mcu_types[i].name)
363 {
364 show_mcu_list (stderr);
365 as_fatal (_("unknown MCU: %s\n"), arg);
366 }
367
368 /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
369 type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
370 as .arch ... in the asm output at the same time. */
371 if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
372 avr_mcu = &mcu_types[i];
373 else
374 as_fatal (_("redefinition of mcu type `%s' to `%s'"),
375 avr_mcu->name, mcu_types[i].name);
376 return 1;
377 }
378 case OPTION_ALL_OPCODES:
379 avr_opt.all_opcodes = 1;
380 return 1;
381 case OPTION_NO_SKIP_BUG:
382 avr_opt.no_skip_bug = 1;
383 return 1;
384 case OPTION_NO_WRAP:
385 avr_opt.no_wrap = 1;
386 return 1;
387 }
388
389 return 0;
390 }
391
392 symbolS *
393 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
394 {
395 return NULL;
396 }
397
398 /* Turn a string in input_line_pointer into a floating point constant
399 of type TYPE, and store the appropriate bytes in *LITP. The number
400 of LITTLENUMS emitted is stored in *SIZEP. An error message is
401 returned, or NULL on OK. */
402
403 char *
404 md_atof (int type, char *litP, int *sizeP)
405 {
406 int prec;
407 LITTLENUM_TYPE words[4];
408 LITTLENUM_TYPE *wordP;
409 char *t;
410
411 switch (type)
412 {
413 case 'f':
414 prec = 2;
415 break;
416 case 'd':
417 prec = 4;
418 break;
419 default:
420 *sizeP = 0;
421 return _("bad call to md_atof");
422 }
423
424 t = atof_ieee (input_line_pointer, type, words);
425 if (t)
426 input_line_pointer = t;
427
428 *sizeP = prec * sizeof (LITTLENUM_TYPE);
429
430 /* This loop outputs the LITTLENUMs in REVERSE order. */
431 for (wordP = words + prec - 1; prec--;)
432 {
433 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
434 litP += sizeof (LITTLENUM_TYPE);
435 }
436
437 return NULL;
438 }
439
440 void
441 md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
442 asection *sec ATTRIBUTE_UNUSED,
443 fragS *fragP ATTRIBUTE_UNUSED)
444 {
445 abort ();
446 }
447
448 void
449 md_begin (void)
450 {
451 unsigned int i;
452 struct avr_opcodes_s *opcode;
453
454 avr_hash = hash_new ();
455
456 /* Insert unique names into hash table. This hash table then provides a
457 quick index to the first opcode with a particular name in the opcode
458 table. */
459 for (opcode = avr_opcodes; opcode->name; opcode++)
460 hash_insert (avr_hash, opcode->name, (char *) opcode);
461
462 avr_mod_hash = hash_new ();
463
464 for (i = 0; i < ARRAY_SIZE (exp_mod); ++i)
465 {
466 mod_index m;
467
468 m.index = i + 10;
469 hash_insert (avr_mod_hash, EXP_MOD_NAME (i), m.ptr);
470 }
471
472 bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
473 }
474
475 /* Resolve STR as a constant expression and return the result.
476 If result greater than MAX then error. */
477
478 static unsigned int
479 avr_get_constant (char *str, int max)
480 {
481 expressionS ex;
482
483 str = skip_space (str);
484 input_line_pointer = str;
485 expression (& ex);
486
487 if (ex.X_op != O_constant)
488 as_bad (_("constant value required"));
489
490 if (ex.X_add_number > max || ex.X_add_number < 0)
491 as_bad (_("number must be less than %d"), max + 1);
492
493 return ex.X_add_number;
494 }
495
496 /* Parse for ldd/std offset. */
497
498 static void
499 avr_offset_expression (expressionS *exp)
500 {
501 char *str = input_line_pointer;
502 char *tmp;
503 char op[8];
504
505 tmp = str;
506 str = extract_word (str, op, sizeof (op));
507
508 input_line_pointer = tmp;
509 expression (exp);
510
511 /* Warn about expressions that fail to use lo8 (). */
512 if (exp->X_op == O_constant)
513 {
514 int x = exp->X_add_number;
515
516 if (x < -255 || x > 255)
517 as_warn (_("constant out of 8-bit range: %d"), x);
518 }
519 }
520
521 /* Parse ordinary expression. */
522
523 static char *
524 parse_exp (char *s, expressionS *op)
525 {
526 input_line_pointer = s;
527 expression (op);
528 if (op->X_op == O_absent)
529 as_bad (_("missing operand"));
530 return input_line_pointer;
531 }
532
533 /* Parse special expressions (needed for LDI command):
534 xx8 (address)
535 xx8 (-address)
536 pm_xx8 (address)
537 pm_xx8 (-address)
538 where xx is: hh, hi, lo. */
539
540 static bfd_reloc_code_real_type
541 avr_ldi_expression (expressionS *exp)
542 {
543 char *str = input_line_pointer;
544 char *tmp;
545 char op[8];
546 int mod;
547 tmp = str;
548
549 str = extract_word (str, op, sizeof (op));
550
551 if (op[0])
552 {
553 mod_index m;
554
555 m.ptr = hash_find (avr_mod_hash, op);
556 mod = m.index;
557
558 if (mod)
559 {
560 int closes = 0;
561
562 mod -= 10;
563 str = skip_space (str);
564
565 if (*str == '(')
566 {
567 int neg_p = 0;
568
569 ++str;
570
571 if (strncmp ("pm(", str, 3) == 0
572 || strncmp ("-(pm(", str, 5) == 0)
573 {
574 if (HAVE_PM_P (mod))
575 {
576 ++mod;
577 ++closes;
578 }
579 else
580 as_bad (_("illegal expression"));
581
582 if (*str == '-')
583 {
584 neg_p = 1;
585 ++closes;
586 str += 5;
587 }
588 else
589 str += 3;
590 }
591
592 if (*str == '-' && *(str + 1) == '(')
593 {
594 neg_p ^= 1;
595 ++closes;
596 str += 2;
597 }
598
599 input_line_pointer = str;
600 expression (exp);
601
602 do
603 {
604 if (*input_line_pointer != ')')
605 {
606 as_bad (_("`)' required"));
607 break;
608 }
609 input_line_pointer++;
610 }
611 while (closes--);
612
613 return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod);
614 }
615 }
616 }
617
618 input_line_pointer = tmp;
619 expression (exp);
620
621 /* Warn about expressions that fail to use lo8 (). */
622 if (exp->X_op == O_constant)
623 {
624 int x = exp->X_add_number;
625
626 if (x < -255 || x > 255)
627 as_warn (_("constant out of 8-bit range: %d"), x);
628 }
629
630 return BFD_RELOC_AVR_LDI;
631 }
632
633 /* Parse one instruction operand.
634 Return operand bitmask. Also fixups can be generated. */
635
636 static unsigned int
637 avr_operand (struct avr_opcodes_s *opcode,
638 int where,
639 char *op,
640 char **line)
641 {
642 expressionS op_expr;
643 unsigned int op_mask = 0;
644 char *str = skip_space (*line);
645
646 switch (*op)
647 {
648 /* Any register operand. */
649 case 'w':
650 case 'd':
651 case 'r':
652 case 'a':
653 case 'v':
654 if (*str == 'r' || *str == 'R')
655 {
656 char r_name[20];
657
658 str = extract_word (str, r_name, sizeof (r_name));
659 op_mask = 0xff;
660 if (ISDIGIT (r_name[1]))
661 {
662 if (r_name[2] == '\0')
663 op_mask = r_name[1] - '0';
664 else if (r_name[1] != '0'
665 && ISDIGIT (r_name[2])
666 && r_name[3] == '\0')
667 op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0';
668 }
669 }
670 else
671 {
672 op_mask = avr_get_constant (str, 31);
673 str = input_line_pointer;
674 }
675
676 if (op_mask <= 31)
677 {
678 switch (*op)
679 {
680 case 'a':
681 if (op_mask < 16 || op_mask > 23)
682 as_bad (_("register r16-r23 required"));
683 op_mask -= 16;
684 break;
685
686 case 'd':
687 if (op_mask < 16)
688 as_bad (_("register number above 15 required"));
689 op_mask -= 16;
690 break;
691
692 case 'v':
693 if (op_mask & 1)
694 as_bad (_("even register number required"));
695 op_mask >>= 1;
696 break;
697
698 case 'w':
699 if ((op_mask & 1) || op_mask < 24)
700 as_bad (_("register r24, r26, r28 or r30 required"));
701 op_mask = (op_mask - 24) >> 1;
702 break;
703 }
704 break;
705 }
706 as_bad (_("register name or number from 0 to 31 required"));
707 break;
708
709 case 'e':
710 {
711 char c;
712
713 if (*str == '-')
714 {
715 str = skip_space (str + 1);
716 op_mask = 0x1002;
717 }
718 c = TOLOWER (*str);
719 if (c == 'x')
720 op_mask |= 0x100c;
721 else if (c == 'y')
722 op_mask |= 0x8;
723 else if (c != 'z')
724 as_bad (_("pointer register (X, Y or Z) required"));
725
726 str = skip_space (str + 1);
727 if (*str == '+')
728 {
729 ++str;
730 if (op_mask & 2)
731 as_bad (_("cannot both predecrement and postincrement"));
732 op_mask |= 0x1001;
733 }
734
735 /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
736 registers, no predecrement, no postincrement. */
737 if (!avr_opt.all_opcodes && (op_mask & 0x100F)
738 && !(avr_mcu->isa & AVR_ISA_SRAM))
739 as_bad (_("addressing mode not supported"));
740 }
741 break;
742
743 case 'z':
744 if (*str == '-')
745 as_bad (_("can't predecrement"));
746
747 if (! (*str == 'z' || *str == 'Z'))
748 as_bad (_("pointer register Z required"));
749
750 str = skip_space (str + 1);
751
752 if (*str == '+')
753 {
754 ++str;
755 op_mask |= 1;
756 }
757 break;
758
759 case 'b':
760 {
761 char c = TOLOWER (*str++);
762
763 if (c == 'y')
764 op_mask |= 0x8;
765 else if (c != 'z')
766 as_bad (_("pointer register (Y or Z) required"));
767 str = skip_space (str);
768 if (*str++ == '+')
769 {
770 input_line_pointer = str;
771 avr_offset_expression (& op_expr);
772 str = input_line_pointer;
773 fix_new_exp (frag_now, where, 3,
774 &op_expr, FALSE, BFD_RELOC_AVR_6);
775 }
776 }
777 break;
778
779 case 'h':
780 str = parse_exp (str, &op_expr);
781 fix_new_exp (frag_now, where, opcode->insn_size * 2,
782 &op_expr, FALSE, BFD_RELOC_AVR_CALL);
783 break;
784
785 case 'L':
786 str = parse_exp (str, &op_expr);
787 fix_new_exp (frag_now, where, opcode->insn_size * 2,
788 &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL);
789 break;
790
791 case 'l':
792 str = parse_exp (str, &op_expr);
793 fix_new_exp (frag_now, where, opcode->insn_size * 2,
794 &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL);
795 break;
796
797 case 'i':
798 str = parse_exp (str, &op_expr);
799 fix_new_exp (frag_now, where + 2, opcode->insn_size * 2,
800 &op_expr, FALSE, BFD_RELOC_16);
801 break;
802
803 case 'M':
804 {
805 bfd_reloc_code_real_type r_type;
806
807 input_line_pointer = str;
808 r_type = avr_ldi_expression (&op_expr);
809 str = input_line_pointer;
810 fix_new_exp (frag_now, where, 3,
811 &op_expr, FALSE, r_type);
812 }
813 break;
814
815 case 'n':
816 {
817 unsigned int x;
818
819 x = ~avr_get_constant (str, 255);
820 str = input_line_pointer;
821 op_mask |= (x & 0xf) | ((x << 4) & 0xf00);
822 }
823 break;
824
825 case 'K':
826 input_line_pointer = str;
827 avr_offset_expression (& op_expr);
828 str = input_line_pointer;
829 fix_new_exp (frag_now, where, 3,
830 & op_expr, FALSE, BFD_RELOC_AVR_6_ADIW);
831 break;
832
833 case 'S':
834 case 's':
835 {
836 unsigned int x;
837
838 x = avr_get_constant (str, 7);
839 str = input_line_pointer;
840 if (*op == 'S')
841 x <<= 4;
842 op_mask |= x;
843 }
844 break;
845
846 case 'P':
847 {
848 unsigned int x;
849
850 x = avr_get_constant (str, 63);
851 str = input_line_pointer;
852 op_mask |= (x & 0xf) | ((x & 0x30) << 5);
853 }
854 break;
855
856 case 'p':
857 {
858 unsigned int x;
859
860 x = avr_get_constant (str, 31);
861 str = input_line_pointer;
862 op_mask |= x << 3;
863 }
864 break;
865
866 case '?':
867 break;
868
869 default:
870 as_bad (_("unknown constraint `%c'"), *op);
871 }
872
873 *line = str;
874 return op_mask;
875 }
876
877 /* Parse instruction operands.
878 Return binary opcode. */
879
880 static unsigned int
881 avr_operands (struct avr_opcodes_s *opcode, char **line)
882 {
883 char *op = opcode->constraints;
884 unsigned int bin = opcode->bin_opcode;
885 char *frag = frag_more (opcode->insn_size * 2);
886 char *str = *line;
887 int where = frag - frag_now->fr_literal;
888 static unsigned int prev = 0; /* Previous opcode. */
889
890 /* Opcode have operands. */
891 if (*op)
892 {
893 unsigned int reg1 = 0;
894 unsigned int reg2 = 0;
895 int reg1_present = 0;
896 int reg2_present = 0;
897
898 /* Parse first operand. */
899 if (REGISTER_P (*op))
900 reg1_present = 1;
901 reg1 = avr_operand (opcode, where, op, &str);
902 ++op;
903
904 /* Parse second operand. */
905 if (*op)
906 {
907 if (*op == ',')
908 ++op;
909
910 if (*op == '=')
911 {
912 reg2 = reg1;
913 reg2_present = 1;
914 }
915 else
916 {
917 if (REGISTER_P (*op))
918 reg2_present = 1;
919
920 str = skip_space (str);
921 if (*str++ != ',')
922 as_bad (_("`,' required"));
923 str = skip_space (str);
924
925 reg2 = avr_operand (opcode, where, op, &str);
926 }
927
928 if (reg1_present && reg2_present)
929 reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200);
930 else if (reg2_present)
931 reg2 <<= 4;
932 }
933 if (reg1_present)
934 reg1 <<= 4;
935 bin |= reg1 | reg2;
936 }
937
938 /* Detect undefined combinations (like ld r31,Z+). */
939 if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin))
940 as_warn (_("undefined combination of operands"));
941
942 if (opcode->insn_size == 2)
943 {
944 /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
945 (AVR core bug, fixed in the newer devices). */
946 if (!(avr_opt.no_skip_bug ||
947 (avr_mcu->isa & (AVR_ISA_MUL | AVR_ISA_MOVW)))
948 && AVR_SKIP_P (prev))
949 as_warn (_("skipping two-word instruction"));
950
951 bfd_putl32 ((bfd_vma) bin, frag);
952 }
953 else
954 bfd_putl16 ((bfd_vma) bin, frag);
955
956 prev = bin;
957 *line = str;
958 return bin;
959 }
960
961 /* GAS will call this function for each section at the end of the assembly,
962 to permit the CPU backend to adjust the alignment of a section. */
963
964 valueT
965 md_section_align (asection *seg, valueT addr)
966 {
967 int align = bfd_get_section_alignment (stdoutput, seg);
968 return ((addr + (1 << align) - 1) & (-1 << align));
969 }
970
971 /* If you define this macro, it should return the offset between the
972 address of a PC relative fixup and the position from which the PC
973 relative adjustment should be made. On many processors, the base
974 of a PC relative instruction is the next instruction, so this
975 macro would return the length of an instruction. */
976
977 long
978 md_pcrel_from_section (fixS *fixp, segT sec)
979 {
980 if (fixp->fx_addsy != (symbolS *) NULL
981 && (!S_IS_DEFINED (fixp->fx_addsy)
982 || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
983 return 0;
984
985 return fixp->fx_frag->fr_address + fixp->fx_where;
986 }
987
988 /* GAS will call this for each fixup. It should store the correct
989 value in the object file. */
990
991 void
992 md_apply_fix (fixS *fixP, valueT * valP, segT seg)
993 {
994 unsigned char *where;
995 unsigned long insn;
996 long value = *valP;
997
998 if (fixP->fx_addsy == (symbolS *) NULL)
999 fixP->fx_done = 1;
1000
1001 else if (fixP->fx_pcrel)
1002 {
1003 segT s = S_GET_SEGMENT (fixP->fx_addsy);
1004
1005 if (s == seg || s == absolute_section)
1006 {
1007 value += S_GET_VALUE (fixP->fx_addsy);
1008 fixP->fx_done = 1;
1009 }
1010 }
1011
1012 /* We don't actually support subtracting a symbol. */
1013 if (fixP->fx_subsy != (symbolS *) NULL)
1014 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
1015
1016 switch (fixP->fx_r_type)
1017 {
1018 default:
1019 fixP->fx_no_overflow = 1;
1020 break;
1021 case BFD_RELOC_AVR_7_PCREL:
1022 case BFD_RELOC_AVR_13_PCREL:
1023 case BFD_RELOC_32:
1024 case BFD_RELOC_16:
1025 case BFD_RELOC_AVR_CALL:
1026 break;
1027 }
1028
1029 if (fixP->fx_done)
1030 {
1031 /* Fetch the instruction, insert the fully resolved operand
1032 value, and stuff the instruction back again. */
1033 where = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where;
1034 insn = bfd_getl16 (where);
1035
1036 switch (fixP->fx_r_type)
1037 {
1038 case BFD_RELOC_AVR_7_PCREL:
1039 if (value & 1)
1040 as_bad_where (fixP->fx_file, fixP->fx_line,
1041 _("odd address operand: %ld"), value);
1042
1043 /* Instruction addresses are always right-shifted by 1. */
1044 value >>= 1;
1045 --value; /* Correct PC. */
1046
1047 if (value < -64 || value > 63)
1048 as_bad_where (fixP->fx_file, fixP->fx_line,
1049 _("operand out of range: %ld"), value);
1050 value = (value << 3) & 0x3f8;
1051 bfd_putl16 ((bfd_vma) (value | insn), where);
1052 break;
1053
1054 case BFD_RELOC_AVR_13_PCREL:
1055 if (value & 1)
1056 as_bad_where (fixP->fx_file, fixP->fx_line,
1057 _("odd address operand: %ld"), value);
1058
1059 /* Instruction addresses are always right-shifted by 1. */
1060 value >>= 1;
1061 --value; /* Correct PC. */
1062
1063 if (value < -2048 || value > 2047)
1064 {
1065 /* No wrap for devices with >8K of program memory. */
1066 if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap)
1067 as_bad_where (fixP->fx_file, fixP->fx_line,
1068 _("operand out of range: %ld"), value);
1069 }
1070
1071 value &= 0xfff;
1072 bfd_putl16 ((bfd_vma) (value | insn), where);
1073 break;
1074
1075 case BFD_RELOC_32:
1076 bfd_putl16 ((bfd_vma) value, where);
1077 break;
1078
1079 case BFD_RELOC_16:
1080 bfd_putl16 ((bfd_vma) value, where);
1081 break;
1082
1083 case BFD_RELOC_AVR_16_PM:
1084 bfd_putl16 ((bfd_vma) (value >> 1), where);
1085 break;
1086
1087 case BFD_RELOC_AVR_LDI:
1088 if (value > 255)
1089 as_bad_where (fixP->fx_file, fixP->fx_line,
1090 _("operand out of range: %ld"), value);
1091 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
1092 break;
1093
1094 case BFD_RELOC_AVR_6:
1095 if ((value > 63) || (value < 0))
1096 as_bad_where (fixP->fx_file, fixP->fx_line,
1097 _("operand out of range: %ld"), value);
1098 bfd_putl16 ((bfd_vma) insn | ((value & 7) | ((value & (3 << 3)) << 7) | ((value & (1 << 5)) << 8)), where);
1099 break;
1100
1101 case BFD_RELOC_AVR_6_ADIW:
1102 if ((value > 63) || (value < 0))
1103 as_bad_where (fixP->fx_file, fixP->fx_line,
1104 _("operand out of range: %ld"), value);
1105 bfd_putl16 ((bfd_vma) insn | (value & 0xf) | ((value & 0x30) << 2), where);
1106 break;
1107
1108 case BFD_RELOC_AVR_LO8_LDI:
1109 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
1110 break;
1111
1112 case BFD_RELOC_AVR_HI8_LDI:
1113 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where);
1114 break;
1115
1116 case BFD_RELOC_AVR_MS8_LDI:
1117 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where);
1118 break;
1119
1120 case BFD_RELOC_AVR_HH8_LDI:
1121 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
1122 break;
1123
1124 case BFD_RELOC_AVR_LO8_LDI_NEG:
1125 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where);
1126 break;
1127
1128 case BFD_RELOC_AVR_HI8_LDI_NEG:
1129 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where);
1130 break;
1131
1132 case BFD_RELOC_AVR_MS8_LDI_NEG:
1133 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where);
1134 break;
1135
1136 case BFD_RELOC_AVR_HH8_LDI_NEG:
1137 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
1138 break;
1139
1140 case BFD_RELOC_AVR_LO8_LDI_PM:
1141 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where);
1142 break;
1143
1144 case BFD_RELOC_AVR_HI8_LDI_PM:
1145 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where);
1146 break;
1147
1148 case BFD_RELOC_AVR_HH8_LDI_PM:
1149 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where);
1150 break;
1151
1152 case BFD_RELOC_AVR_LO8_LDI_PM_NEG:
1153 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where);
1154 break;
1155
1156 case BFD_RELOC_AVR_HI8_LDI_PM_NEG:
1157 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where);
1158 break;
1159
1160 case BFD_RELOC_AVR_HH8_LDI_PM_NEG:
1161 bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where);
1162 break;
1163
1164 case BFD_RELOC_AVR_CALL:
1165 {
1166 unsigned long x;
1167
1168 x = bfd_getl16 (where);
1169 if (value & 1)
1170 as_bad_where (fixP->fx_file, fixP->fx_line,
1171 _("odd address operand: %ld"), value);
1172 value >>= 1;
1173 x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16;
1174 bfd_putl16 ((bfd_vma) x, where);
1175 bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
1176 }
1177 break;
1178
1179 default:
1180 as_fatal (_("line %d: unknown relocation type: 0x%x"),
1181 fixP->fx_line, fixP->fx_r_type);
1182 break;
1183 }
1184 }
1185 else
1186 {
1187 switch (fixP->fx_r_type)
1188 {
1189 case -BFD_RELOC_AVR_HI8_LDI_NEG:
1190 case -BFD_RELOC_AVR_HI8_LDI:
1191 case -BFD_RELOC_AVR_LO8_LDI_NEG:
1192 case -BFD_RELOC_AVR_LO8_LDI:
1193 as_bad_where (fixP->fx_file, fixP->fx_line,
1194 _("only constant expression allowed"));
1195 fixP->fx_done = 1;
1196 break;
1197 default:
1198 break;
1199 }
1200 }
1201 }
1202
1203 /* GAS will call this to generate a reloc, passing the resulting reloc
1204 to `bfd_install_relocation'. This currently works poorly, as
1205 `bfd_install_relocation' often does the wrong thing, and instances of
1206 `tc_gen_reloc' have been written to work around the problems, which
1207 in turns makes it difficult to fix `bfd_install_relocation'. */
1208
1209 /* If while processing a fixup, a reloc really needs to be created
1210 then it is done here. */
1211
1212 arelent *
1213 tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED,
1214 fixS *fixp)
1215 {
1216 arelent *reloc;
1217
1218 if (fixp->fx_addsy && fixp->fx_subsy)
1219 {
1220 long value = 0;
1221
1222 if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
1223 || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
1224 {
1225 as_bad_where (fixp->fx_file, fixp->fx_line,
1226 "Difference of symbols in different sections is not supported");
1227 return NULL;
1228 }
1229
1230 /* We are dealing with two symbols defined in the same section.
1231 Let us fix-up them here. */
1232 value += S_GET_VALUE (fixp->fx_addsy);
1233 value -= S_GET_VALUE (fixp->fx_subsy);
1234
1235 /* When fx_addsy and fx_subsy both are zero, md_apply_fix
1236 only takes it's second operands for the fixup value. */
1237 fixp->fx_addsy = NULL;
1238 fixp->fx_subsy = NULL;
1239 md_apply_fix (fixp, (valueT *) &value, NULL);
1240
1241 return NULL;
1242 }
1243
1244 reloc = xmalloc (sizeof (arelent));
1245
1246 reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
1247 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1248
1249 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1250 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1251 if (reloc->howto == (reloc_howto_type *) NULL)
1252 {
1253 as_bad_where (fixp->fx_file, fixp->fx_line,
1254 _("reloc %d not supported by object file format"),
1255 (int) fixp->fx_r_type);
1256 return NULL;
1257 }
1258
1259 if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1260 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1261 reloc->address = fixp->fx_offset;
1262
1263 reloc->addend = fixp->fx_offset;
1264
1265 return reloc;
1266 }
1267
1268 void
1269 md_assemble (char *str)
1270 {
1271 struct avr_opcodes_s *opcode;
1272 char op[11];
1273
1274 str = skip_space (extract_word (str, op, sizeof (op)));
1275
1276 if (!op[0])
1277 as_bad (_("can't find opcode "));
1278
1279 opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
1280
1281 if (opcode == NULL)
1282 {
1283 as_bad (_("unknown opcode `%s'"), op);
1284 return;
1285 }
1286
1287 /* Special case for opcodes with optional operands (lpm, elpm) -
1288 version with operands exists in avr_opcodes[] in the next entry. */
1289
1290 if (*str && *opcode->constraints == '?')
1291 ++opcode;
1292
1293 if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa)
1294 as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
1295
1296 /* We used to set input_line_pointer to the result of get_operands,
1297 but that is wrong. Our caller assumes we don't change it. */
1298 {
1299 char *t = input_line_pointer;
1300
1301 avr_operands (opcode, &str);
1302 if (*skip_space (str))
1303 as_bad (_("garbage at end of line"));
1304 input_line_pointer = t;
1305 }
1306 }
1307
1308 /* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1309 `avr_cons_fix_new'. */
1310 static int exp_mod_pm = 0;
1311
1312 /* Parse special CONS expression: pm (expression)
1313 which is used for addressing to a program memory.
1314 Relocation: BFD_RELOC_AVR_16_PM. */
1315
1316 void
1317 avr_parse_cons_expression (expressionS *exp, int nbytes)
1318 {
1319 char *tmp;
1320
1321 exp_mod_pm = 0;
1322
1323 tmp = input_line_pointer = skip_space (input_line_pointer);
1324
1325 if (nbytes == 2)
1326 {
1327 char *pm_name = "pm";
1328 int len = strlen (pm_name);
1329
1330 if (strncasecmp (input_line_pointer, pm_name, len) == 0)
1331 {
1332 input_line_pointer = skip_space (input_line_pointer + len);
1333
1334 if (*input_line_pointer == '(')
1335 {
1336 input_line_pointer = skip_space (input_line_pointer + 1);
1337 exp_mod_pm = 1;
1338 expression (exp);
1339
1340 if (*input_line_pointer == ')')
1341 ++input_line_pointer;
1342 else
1343 {
1344 as_bad (_("`)' required"));
1345 exp_mod_pm = 0;
1346 }
1347
1348 return;
1349 }
1350
1351 input_line_pointer = tmp;
1352 }
1353 }
1354
1355 expression (exp);
1356 }
1357
1358 void
1359 avr_cons_fix_new (fragS *frag,
1360 int where,
1361 int nbytes,
1362 expressionS *exp)
1363 {
1364 if (exp_mod_pm == 0)
1365 {
1366 if (nbytes == 2)
1367 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16);
1368 else if (nbytes == 4)
1369 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32);
1370 else
1371 as_bad (_("illegal %srelocation size: %d"), "", nbytes);
1372 }
1373 else
1374 {
1375 if (nbytes == 2)
1376 fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_AVR_16_PM);
1377 else
1378 as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes);
1379 exp_mod_pm = 0;
1380 }
1381 }
GDB Binutils - Deliverables
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