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adde6300 AM |
1 | /* tc-avr.c -- Assembler code for the ATMEL AVR |
2 | ||
3 | Copyright (C) 1999, 2000 Free Software Foundation, Inc. | |
4 | Contributed by Denis Chertykov <denisc@overta.ru> | |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <ctype.h> | |
25 | #include "as.h" | |
26 | #include "subsegs.h" | |
27 | ||
1188e082 DC |
28 | struct avr_opcodes_s |
29 | { | |
30 | char *name; | |
31 | char *constraints; | |
32 | int insn_size; /* in words */ | |
33 | int isa; | |
34 | unsigned int bin_opcode; | |
35 | }; | |
36 | ||
37 | #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ | |
38 | {#NAME, CONSTR, SIZE, ISA, BIN}, | |
39 | ||
40 | struct avr_opcodes_s avr_opcodes[] = | |
41 | { | |
42 | #include "opcode/avr.h" | |
43 | {NULL, NULL, 0, 0, 0} | |
44 | }; | |
45 | ||
46 | ||
adde6300 AM |
47 | const char comment_chars[] = ";"; |
48 | const char line_comment_chars[] = "#"; | |
49 | const char line_separator_chars[] = "$"; | |
50 | ||
adde6300 AM |
51 | const char *md_shortopts = "m:"; |
52 | struct mcu_type_s | |
53 | { | |
54 | char *name; | |
55 | int isa; | |
56 | int mach; | |
57 | }; | |
58 | ||
59 | static struct mcu_type_s mcu_types[] = | |
60 | { | |
b170af93 DC |
61 | {"avr1", AVR_ISA_TINY1, bfd_mach_avr1}, |
62 | {"avr2", AVR_ISA_85xx, bfd_mach_avr2}, | |
63 | {"avr3", AVR_ISA_M103, bfd_mach_avr3}, | |
64 | {"avr4", AVR_ISA_ALL, bfd_mach_avr4}, | |
adde6300 | 65 | {"at90s1200", AVR_ISA_1200, bfd_mach_avr1}, |
b170af93 DC |
66 | {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, |
67 | {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1}, | |
68 | {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1}, | |
69 | {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1}, | |
70 | {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1}, | |
adde6300 AM |
71 | {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2}, |
72 | {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2}, | |
73 | {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, | |
74 | {"attiny22" , AVR_ISA_2xxx, bfd_mach_avr2}, | |
75 | {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2}, | |
76 | {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2}, | |
77 | {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, | |
78 | {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, | |
b170af93 DC |
79 | {"at90s8515", AVR_ISA_85xx, bfd_mach_avr2}, |
80 | {"at90s8535", AVR_ISA_85xx, bfd_mach_avr2}, | |
81 | {"at90c8534", AVR_ISA_85xx, bfd_mach_avr2}, | |
82 | {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, | |
83 | {"atmega103", AVR_ISA_M103, bfd_mach_avr3}, | |
84 | {"atmega161", AVR_ISA_M161, bfd_mach_avr4}, | |
85 | {"at94k10", AVR_ISA_94K, bfd_mach_avr4}, | |
86 | {"at94k20", AVR_ISA_94K, bfd_mach_avr4}, | |
87 | {"at94k40", AVR_ISA_94K, bfd_mach_avr4}, | |
adde6300 AM |
88 | {NULL, 0, 0} |
89 | }; | |
90 | ||
91 | ||
92 | /* Current MCU type. */ | |
93 | static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2}; | |
94 | static struct mcu_type_s *avr_mcu = &default_mcu; | |
95 | ||
96 | const char EXP_CHARS[] = "eE"; | |
97 | const char FLT_CHARS[] = "dD"; | |
98 | static void avr_set_arch (int dummy); | |
99 | ||
100 | /* The target specific pseudo-ops which we support. */ | |
101 | const pseudo_typeS md_pseudo_table[] = | |
102 | { | |
103 | {"arch", avr_set_arch, 0}, | |
104 | { NULL, NULL, 0} | |
105 | }; | |
106 | ||
107 | #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00)) | |
adde6300 AM |
108 | |
109 | static char * skip_space (char * s); | |
110 | static char * extract_word (char *from, char *to, int limit); | |
111 | static unsigned int avr_operand (struct avr_opcodes_s *opcode, | |
112 | int where, char *op, char **line); | |
113 | static unsigned int avr_operands (struct avr_opcodes_s *opcode, char **line); | |
df136245 | 114 | static unsigned int avr_get_constant (char * str, int max); |
adde6300 AM |
115 | static char *parse_exp (char *s, expressionS * op); |
116 | static bfd_reloc_code_real_type avr_ldi_expression (expressionS *exp); | |
117 | long md_pcrel_from_section PARAMS ((fixS *, segT)); | |
118 | ||
b170af93 | 119 | |
adde6300 AM |
120 | #define EXP_MOD_NAME(i) exp_mod[i].name |
121 | #define EXP_MOD_RELOC(i) exp_mod[i].reloc | |
122 | #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc | |
123 | #define HAVE_PM_P(i) exp_mod[i].have_pm | |
124 | ||
125 | struct exp_mod_s | |
126 | { | |
127 | char * name; | |
128 | bfd_reloc_code_real_type reloc; | |
129 | bfd_reloc_code_real_type neg_reloc; | |
130 | int have_pm; | |
131 | }; | |
132 | ||
133 | static struct exp_mod_s exp_mod[] = { | |
134 | {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1}, | |
135 | {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0}, | |
136 | {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1}, | |
137 | {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0}, | |
138 | {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1}, | |
139 | {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0}, | |
140 | {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0}, | |
141 | {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0}, | |
142 | }; | |
143 | ||
144 | /* Opcode hash table. */ | |
145 | static struct hash_control *avr_hash; | |
146 | ||
147 | /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */ | |
148 | static struct hash_control *avr_mod_hash; | |
149 | ||
150 | #define OPTION_MMCU (OPTION_MD_BASE + 1) | |
151 | ||
152 | struct option md_longopts[] = { | |
153 | {"mmcu", required_argument, NULL, 'm'}, | |
154 | {NULL, no_argument, NULL, 0} | |
155 | }; | |
156 | size_t md_longopts_size = sizeof(md_longopts); | |
157 | ||
158 | static inline char * | |
159 | skip_space (s) | |
160 | char * s; | |
161 | { | |
162 | while (*s == ' ' || *s == '\t') | |
163 | ++s; | |
164 | return s; | |
165 | } | |
166 | ||
167 | /* Extract one word from FROM and copy it to TO. */ | |
168 | static char * | |
169 | extract_word (char *from, char *to, int limit) | |
170 | { | |
171 | char *op_start; | |
172 | char *op_end; | |
173 | int size = 0; | |
174 | ||
175 | /* Drop leading whitespace. */ | |
176 | from = skip_space (from); | |
177 | *to = 0; | |
178 | /* Find the op code end. */ | |
179 | for (op_start = op_end = from; *op_end != 0 && is_part_of_name(*op_end); ) | |
180 | { | |
181 | to[size++] = *op_end++; | |
182 | if (size + 1 >= limit) | |
183 | break; | |
184 | } | |
185 | to[size] = 0; | |
186 | return op_end; | |
187 | } | |
188 | ||
189 | int | |
190 | md_estimate_size_before_relax (fragp, seg) | |
df136245 DC |
191 | fragS *fragp ATTRIBUTE_UNUSED; |
192 | asection *seg ATTRIBUTE_UNUSED; | |
adde6300 AM |
193 | { |
194 | abort (); | |
195 | return 0; | |
196 | } | |
197 | ||
198 | void | |
199 | md_show_usage (stream) | |
200 | FILE *stream; | |
201 | { | |
202 | fprintf | |
203 | (stream, | |
204 | _ ("AVR options:\n" | |
205 | " -mmcu=[avr-name] select microcontroller variant\n" | |
206 | " [avr-name] can be:\n" | |
207 | " avr1 - AT90S1200\n" | |
208 | " avr2 - AT90S2xxx, AT90S4xxx, AT90S85xx, ATtiny22\n" | |
209 | " avr3 - ATmega103 or ATmega603\n" | |
210 | " avr4 - ATmega161\n" | |
211 | " or immediate microcontroller name.\n")); | |
212 | } | |
213 | ||
214 | static void | |
215 | avr_set_arch (dummy) | |
df136245 | 216 | int dummy ATTRIBUTE_UNUSED; |
adde6300 AM |
217 | { |
218 | char * str; | |
219 | str = (char *)alloca (20); | |
220 | input_line_pointer = extract_word (input_line_pointer, str, 20); | |
221 | md_parse_option ('m', str); | |
222 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); | |
223 | } | |
224 | ||
225 | int | |
226 | md_parse_option (c, arg) | |
227 | int c; | |
228 | char *arg; | |
229 | { | |
230 | char *t = alloca (strlen (arg) + 1); | |
231 | char *s = t; | |
232 | char *arg1 = arg; | |
233 | do | |
234 | *t = tolower (*arg1++); | |
235 | while (*t++); | |
236 | ||
237 | if (c == 'm') | |
238 | { | |
239 | int i; | |
240 | ||
241 | for (i = 0; mcu_types[i].name; ++i) | |
242 | if (strcmp (mcu_types[i].name, s) == 0) | |
243 | break; | |
244 | ||
245 | if (!mcu_types[i].name) | |
246 | as_fatal (_ ("unknown MCU: %s\n"), arg); | |
247 | if (avr_mcu == &default_mcu) | |
248 | avr_mcu = &mcu_types[i]; | |
249 | else | |
250 | as_fatal (_ ("redefinition of mcu type `%s'"), mcu_types[i].name); | |
251 | return 1; | |
252 | } | |
253 | return 0; | |
254 | } | |
255 | ||
256 | symbolS * | |
b170af93 | 257 | md_undefined_symbol(name) |
df136245 | 258 | char *name ATTRIBUTE_UNUSED; |
adde6300 AM |
259 | { |
260 | return 0; | |
261 | } | |
262 | ||
263 | /* Convert a string pointed to by input_line_pointer into a floating point | |
264 | constant of type `type', and store the appropriate bytes to `*litP'. | |
265 | The number of LITTLENUMS emitted is stored in `*sizeP'. Returns NULL if | |
266 | OK, or an error message otherwise. */ | |
267 | char * | |
268 | md_atof (type, litP, sizeP) | |
269 | int type; | |
270 | char *litP; | |
271 | int *sizeP; | |
272 | { | |
273 | int prec; | |
274 | LITTLENUM_TYPE words[4]; | |
275 | LITTLENUM_TYPE *wordP; | |
276 | char *t; | |
277 | ||
278 | switch (type) | |
279 | { | |
280 | case 'f': | |
281 | prec = 2; | |
282 | break; | |
283 | case 'd': | |
284 | prec = 4; | |
285 | break; | |
286 | default: | |
287 | *sizeP = 0; | |
288 | return _("bad call to md_atof"); | |
289 | } | |
290 | ||
291 | t = atof_ieee (input_line_pointer, type, words); | |
292 | if (t) | |
293 | input_line_pointer = t; | |
294 | ||
295 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
296 | /* This loop outputs the LITTLENUMs in REVERSE order. */ | |
297 | for (wordP = words + prec - 1; prec--;) | |
298 | { | |
299 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
300 | litP += sizeof (LITTLENUM_TYPE); | |
301 | } | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | void | |
306 | md_convert_frag (abfd, sec, fragP) | |
df136245 DC |
307 | bfd *abfd ATTRIBUTE_UNUSED; |
308 | asection *sec ATTRIBUTE_UNUSED; | |
309 | fragS *fragP ATTRIBUTE_UNUSED; | |
adde6300 AM |
310 | { |
311 | abort (); | |
312 | } | |
313 | ||
314 | ||
315 | void | |
316 | md_begin () | |
317 | { | |
df136245 | 318 | unsigned int i; |
adde6300 AM |
319 | struct avr_opcodes_s *opcode; |
320 | avr_hash = hash_new(); | |
321 | ||
322 | /* Insert unique names into hash table. This hash table then provides a | |
323 | quick index to the first opcode with a particular name in the opcode | |
324 | table. */ | |
325 | ||
326 | for (opcode = avr_opcodes; opcode->name; opcode++) | |
327 | hash_insert (avr_hash, opcode->name, (char *) opcode); | |
328 | ||
329 | avr_mod_hash = hash_new (); | |
330 | ||
331 | for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i) | |
332 | hash_insert (avr_mod_hash, EXP_MOD_NAME(i), (void*)(i+10)); | |
b170af93 | 333 | |
adde6300 AM |
334 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
335 | } | |
336 | ||
337 | ||
df136245 DC |
338 | /* Resolve STR as a constant expression and return the result. |
339 | If result greater than MAX then error. */ | |
340 | ||
341 | static unsigned int | |
342 | avr_get_constant (str, max) | |
343 | char * str; | |
344 | int max; | |
345 | { | |
346 | expressionS ex; | |
347 | str = skip_space (str); | |
348 | input_line_pointer = str; | |
349 | expression (&ex); | |
350 | ||
351 | if (ex.X_op != O_constant) | |
352 | as_bad (_("constant value required")); | |
353 | ||
354 | if (ex.X_add_number > max || ex.X_add_number < 0) | |
355 | as_bad (_("number must be less than %d"), max+1); | |
356 | return ex.X_add_number; | |
357 | } | |
358 | ||
359 | ||
360 | /* Parse instruction operands. | |
361 | Returns binary opcode. */ | |
362 | ||
adde6300 AM |
363 | static unsigned int |
364 | avr_operands (opcode, line) | |
365 | struct avr_opcodes_s *opcode; | |
366 | char **line; | |
367 | { | |
368 | char *op = opcode->constraints; | |
369 | unsigned int bin = opcode->bin_opcode; | |
370 | char *frag = frag_more (opcode->insn_size * 2); | |
371 | char *str = *line; | |
372 | int where = frag - frag_now->fr_literal; | |
b170af93 | 373 | static unsigned int prev = 0; /* previous opcode */ |
adde6300 AM |
374 | |
375 | /* Opcode have operands. */ | |
376 | if (*op) | |
377 | { | |
378 | unsigned int reg1 = 0; | |
379 | unsigned int reg2 = 0; | |
380 | int reg1_present = 0; | |
381 | int reg2_present = 0; | |
382 | ||
383 | /* Parse first operand. */ | |
384 | if (REGISTER_P (*op)) | |
385 | reg1_present = 1; | |
386 | reg1 = avr_operand (opcode, where, op, &str); | |
387 | ++op; | |
388 | ||
389 | /* Parse second operand. */ | |
390 | if (*op) | |
391 | { | |
392 | if (*op == ',') | |
393 | ++op; | |
394 | if (*op == '=') | |
395 | { | |
396 | reg2 = reg1; | |
397 | reg2_present = 1; | |
398 | } | |
399 | else | |
400 | { | |
401 | if (REGISTER_P (*op)) | |
402 | reg2_present = 1; | |
403 | ||
404 | str = skip_space (str); | |
405 | if (*str++ != ',') | |
406 | as_bad (_ ("`,' required")); | |
407 | str = skip_space (str); | |
408 | ||
409 | reg2 = avr_operand (opcode, where, op, &str); | |
410 | ||
411 | } | |
412 | if (reg1_present && reg2_present) | |
413 | reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200); | |
414 | else if (reg2_present) | |
415 | reg2 <<= 4; | |
416 | } | |
417 | if (reg1_present) | |
418 | reg1 <<= 4; | |
419 | bin |= reg1 | reg2; | |
420 | } | |
b170af93 DC |
421 | |
422 | /* detect undefined combinations (like lpm r31,Z+) */ | |
423 | if (((bin & 0xFDEF) == 0x91AD) || ((bin & 0xFDEF) == 0x91AE) || | |
424 | ((bin & 0xFDEF) == 0x91C9) || ((bin & 0xFDEF) == 0x91CA) || | |
425 | ((bin & 0xFDEF) == 0x91E1) || ((bin & 0xFDEF) == 0x91E2) || | |
426 | ((bin & 0xFFED) == 0x91E5)) | |
427 | as_warn( _("undefined combination of operands")); | |
428 | ||
adde6300 AM |
429 | if (opcode->insn_size == 2) |
430 | { | |
b170af93 DC |
431 | /* warn if previous opcode was cpse/sbic/sbis/sbrc/sbrs |
432 | (AVR core bug) */ | |
433 | if ((prev & 0xFC00) == 0x1000 | |
434 | || (prev & 0xFD00) == 0x9900 | |
435 | || (prev & 0xFC08) == 0xFC00) | |
436 | as_warn (_("skipping two-word instruction")); | |
437 | ||
adde6300 AM |
438 | bfd_putl32 ((bfd_vma)bin, frag); |
439 | } | |
440 | else | |
b170af93 DC |
441 | bfd_putl16 ((bfd_vma)bin, frag); |
442 | ||
443 | prev = bin; | |
adde6300 AM |
444 | *line = str; |
445 | return bin; | |
446 | } | |
447 | ||
adde6300 | 448 | |
df136245 DC |
449 | /* Parse one instruction operand. |
450 | Returns operand bitmask. Also fixups can be generated. */ | |
451 | ||
adde6300 AM |
452 | static unsigned int |
453 | avr_operand (opcode, where, op, line) | |
454 | struct avr_opcodes_s *opcode; | |
455 | int where; | |
456 | char *op; | |
457 | char **line; | |
458 | { | |
adde6300 | 459 | expressionS op_expr; |
df136245 DC |
460 | unsigned int op_mask = 0; |
461 | char *str = skip_space (*line); | |
adde6300 | 462 | |
adde6300 AM |
463 | switch (*op) |
464 | { | |
465 | /* Any register operand. */ | |
466 | case 'w': | |
467 | case 'd': | |
468 | case 'r': | |
b170af93 DC |
469 | case 'a': |
470 | case 'v': | |
adde6300 | 471 | { |
b170af93 DC |
472 | op_mask = -1; |
473 | ||
df136245 DC |
474 | if (*str == 'r' || *str == 'R') |
475 | { | |
476 | char r_name[20]; | |
477 | ||
478 | str = extract_word (str, r_name, sizeof (r_name)); | |
b170af93 DC |
479 | if (isdigit(r_name[1])) |
480 | { | |
481 | if (r_name[2] == '\0') | |
482 | op_mask = r_name[1] - '0'; | |
483 | else if (r_name[1] != '0' | |
484 | && isdigit(r_name[2]) | |
485 | && r_name[3] == '\0') | |
486 | op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; | |
487 | } | |
488 | } | |
489 | else | |
490 | { | |
df136245 DC |
491 | op_mask = avr_get_constant (str, 31); |
492 | str = input_line_pointer; | |
b170af93 DC |
493 | } |
494 | ||
df136245 | 495 | if (op_mask <= 31) |
adde6300 | 496 | { |
b170af93 | 497 | switch (*op) |
adde6300 | 498 | { |
b170af93 DC |
499 | case 'a': |
500 | if (op_mask < 16 || op_mask > 23) | |
501 | as_bad (_ ("register r16-r23 required")); | |
502 | op_mask -= 16; | |
503 | break; | |
504 | ||
505 | case 'd': | |
506 | if (op_mask < 16) | |
507 | as_bad (_ ("register number above 15 required")); | |
508 | op_mask -= 16; | |
509 | break; | |
510 | ||
511 | case 'v': | |
512 | if (op_mask & 1) | |
513 | as_bad (_ ("even register number required")); | |
514 | op_mask >>= 1; | |
515 | break; | |
516 | ||
517 | case 'w': | |
518 | op_mask -= 24; | |
519 | if (op_mask & 1 || op_mask > 6) | |
520 | as_bad (_ ("register r24,r26,r28 or r30 required")); | |
521 | op_mask >>= 1; | |
adde6300 AM |
522 | break; |
523 | } | |
b170af93 | 524 | break; |
adde6300 | 525 | } |
df136245 | 526 | as_bad (_ ("register name or number from 0 to 31 required")); |
adde6300 AM |
527 | } |
528 | break; | |
529 | ||
530 | case 'e': | |
531 | { | |
532 | char c; | |
533 | if (*str == '-') | |
534 | { | |
535 | str = skip_space (str+1); | |
536 | op_mask = 0x1002; | |
537 | } | |
538 | c = tolower (*str); | |
539 | if (c == 'x') | |
540 | op_mask |= 0x100c; | |
541 | else if (c == 'y') | |
542 | op_mask |= 0x8; | |
543 | else if (c != 'z') | |
544 | as_bad (_ ("pointer register (X,Y or Z) required")); | |
545 | ||
546 | str = skip_space (str+1); | |
547 | if (*str == '+') | |
548 | { | |
549 | ++str; | |
550 | if (op_mask & 2) | |
551 | as_bad (_ ("cannot both predecrement and postincrement")); | |
552 | op_mask |= 0x1001; | |
553 | } | |
1188e082 DC |
554 | /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer |
555 | registers, no predecrement, no postincrement */ | |
556 | if ((op_mask & 0x100F) && !(avr_mcu->isa & AVR_ISA_SRAM)) | |
557 | as_bad (_ ("addressing mode not supported")); | |
adde6300 AM |
558 | } |
559 | break; | |
560 | ||
b170af93 DC |
561 | case 'z': |
562 | { | |
563 | if (*str == '-') | |
564 | as_bad (_ ("can't predecrement")); | |
565 | ||
566 | if (! (*str == 'z' || *str == 'Z')) | |
567 | as_bad (_ ("pointer register Z required")); | |
568 | ||
569 | str = skip_space (str + 1); | |
570 | if (*str == '+') | |
571 | { | |
572 | ++str; | |
573 | op_mask |= 1; | |
574 | } | |
575 | } | |
576 | break; | |
577 | ||
adde6300 AM |
578 | case 'b': |
579 | { | |
580 | char c = tolower (*str++); | |
581 | if (c == 'y') | |
582 | op_mask |= 0x8; | |
583 | else if (c != 'z') | |
584 | as_bad (_ ("pointer register (Y or Z) required")); | |
585 | str = skip_space (str); | |
586 | if (*str++ == '+') | |
587 | { | |
588 | unsigned int x; | |
589 | x = avr_get_constant (str, 63); | |
590 | str = input_line_pointer; | |
591 | op_mask |= (x & 7) | ((x & (3 << 3)) << 7) | ((x & (1 << 5)) << 8); | |
592 | } | |
593 | } | |
594 | break; | |
595 | ||
596 | case 'h': | |
597 | { | |
598 | str = parse_exp (str, &op_expr); | |
599 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
600 | &op_expr, false, BFD_RELOC_AVR_CALL); | |
601 | ||
602 | } | |
603 | break; | |
604 | ||
605 | case 'L': | |
606 | { | |
607 | str = parse_exp (str, &op_expr); | |
608 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
609 | &op_expr, true, BFD_RELOC_AVR_13_PCREL); | |
610 | ||
611 | } | |
612 | break; | |
613 | ||
614 | case 'l': | |
615 | { | |
616 | str = parse_exp (str, &op_expr); | |
617 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
618 | &op_expr, true, BFD_RELOC_AVR_7_PCREL); | |
619 | ||
620 | } | |
621 | break; | |
622 | ||
623 | case 'i': | |
624 | { | |
625 | str = parse_exp (str, &op_expr); | |
626 | fix_new_exp (frag_now, where+2, opcode->insn_size * 2, | |
627 | &op_expr, false, BFD_RELOC_16); | |
628 | ||
629 | } | |
630 | break; | |
631 | ||
632 | case 'M': | |
633 | { | |
634 | bfd_reloc_code_real_type r_type; | |
635 | input_line_pointer = str; | |
636 | r_type = avr_ldi_expression (&op_expr); | |
637 | str = input_line_pointer; | |
638 | fix_new_exp (frag_now, where, 3, | |
639 | &op_expr, false, r_type); | |
640 | } | |
641 | break; | |
642 | ||
643 | case 'n': | |
644 | { | |
645 | unsigned int x; | |
646 | x = ~avr_get_constant (str, 255); | |
647 | str = input_line_pointer; | |
648 | op_mask |= (x & 0xf) | ((x << 4) & 0xf00); | |
649 | } | |
650 | break; | |
651 | ||
652 | case 'K': | |
653 | { | |
654 | unsigned int x; | |
655 | x = avr_get_constant (str, 63); | |
656 | str = input_line_pointer; | |
657 | op_mask |= (x & 0xf) | ((x & 0x30) << 2); | |
658 | } | |
659 | break; | |
660 | ||
661 | case 'S': | |
662 | case 's': | |
663 | { | |
664 | unsigned int x; | |
665 | x = avr_get_constant (str, 7); | |
666 | str = input_line_pointer; | |
667 | if (*op == 'S') | |
668 | x <<= 4; | |
669 | op_mask |= x; | |
670 | } | |
671 | break; | |
672 | ||
673 | case 'P': | |
674 | { | |
675 | unsigned int x; | |
676 | x = avr_get_constant (str, 63); | |
677 | str = input_line_pointer; | |
678 | op_mask |= (x & 0xf) | ((x & 0x30) << 5); | |
679 | } | |
680 | break; | |
681 | ||
682 | case 'p': | |
683 | { | |
684 | unsigned int x; | |
685 | x = avr_get_constant (str, 31); | |
686 | str = input_line_pointer; | |
687 | op_mask |= x << 3; | |
688 | } | |
689 | break; | |
1188e082 DC |
690 | case '?': |
691 | break; | |
adde6300 AM |
692 | default: |
693 | as_bad (_ ("unknown constraint `%c'"), *op); | |
694 | } | |
695 | *line = str; | |
696 | return op_mask; | |
697 | } | |
698 | ||
699 | /* GAS will call this function for each section at the end of the assembly, | |
700 | to permit the CPU backend to adjust the alignment of a section. */ | |
701 | valueT | |
702 | md_section_align (seg, addr) | |
703 | asection *seg; | |
704 | valueT addr; | |
705 | { | |
706 | int align = bfd_get_section_alignment (stdoutput, seg); | |
707 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
708 | } | |
709 | ||
710 | /* If you define this macro, it should return the offset between the | |
711 | address of a PC relative fixup and the position from which the PC | |
712 | relative adjustment should be made. On many processors, the base | |
713 | of a PC relative instruction is the next instruction, so this | |
714 | macro would return the length of an instruction. */ | |
715 | long | |
716 | md_pcrel_from_section (fixp, sec) | |
717 | fixS *fixp; | |
718 | segT sec; | |
719 | { | |
720 | if (fixp->fx_addsy != (symbolS *)NULL | |
721 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
722 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
723 | return 0; | |
724 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
725 | } | |
726 | ||
727 | /* GAS will call this for each fixup. It should store the correct | |
728 | value in the object file. */ | |
729 | int | |
730 | md_apply_fix3 (fixp, valuep, seg) | |
731 | fixS *fixp; | |
732 | valueT *valuep; | |
733 | segT seg; | |
734 | { | |
735 | unsigned char *where; | |
736 | unsigned long insn; | |
737 | long value; | |
738 | ||
739 | if (fixp->fx_addsy == (symbolS *) NULL) | |
740 | { | |
741 | value = *valuep; | |
742 | fixp->fx_done = 1; | |
743 | } | |
744 | else if (fixp->fx_pcrel) | |
745 | { | |
746 | segT s = S_GET_SEGMENT (fixp->fx_addsy); | |
747 | if (fixp->fx_addsy && (s == seg || s == absolute_section)) | |
748 | { | |
749 | value = S_GET_VALUE (fixp->fx_addsy) + *valuep; | |
750 | fixp->fx_done = 1; | |
751 | } | |
752 | else | |
753 | value = *valuep; | |
754 | } | |
755 | else | |
756 | { | |
757 | value = fixp->fx_offset; | |
758 | if (fixp->fx_subsy != (symbolS *) NULL) | |
759 | { | |
760 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
761 | { | |
762 | value -= S_GET_VALUE (fixp->fx_subsy); | |
763 | fixp->fx_done = 1; | |
764 | } | |
765 | else | |
766 | { | |
767 | /* We don't actually support subtracting a symbol. */ | |
768 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
769 | _ ("expression too complex")); | |
770 | } | |
771 | } | |
772 | } | |
773 | switch (fixp->fx_r_type) | |
774 | { | |
775 | default: | |
776 | fixp->fx_no_overflow = 1; | |
777 | break; | |
778 | case BFD_RELOC_AVR_7_PCREL: | |
779 | case BFD_RELOC_AVR_13_PCREL: | |
780 | case BFD_RELOC_32: | |
781 | case BFD_RELOC_16: | |
782 | case BFD_RELOC_AVR_CALL: | |
783 | break; | |
784 | } | |
785 | ||
786 | if (fixp->fx_done) | |
787 | { | |
788 | /* Fetch the instruction, insert the fully resolved operand | |
789 | value, and stuff the instruction back again. */ | |
790 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
791 | insn = bfd_getl16 (where); | |
792 | ||
793 | switch (fixp->fx_r_type) | |
794 | { | |
795 | case BFD_RELOC_AVR_7_PCREL: | |
796 | if (value & 1) | |
797 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
798 | _("odd address operand: %ld"), value); | |
799 | /* Instruction addresses are always right-shifted by 1. */ | |
800 | value >>= 1; | |
801 | --value; /* Correct PC. */ | |
802 | if (value < -64 || value > 63) | |
803 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
804 | _("operand out of range: %ld"), value); | |
805 | value = (value << 3) & 0x3f8; | |
806 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
807 | break; | |
808 | ||
809 | case BFD_RELOC_AVR_13_PCREL: | |
810 | if (value & 1) | |
811 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
812 | _("odd address operand: %ld"), value); | |
813 | /* Instruction addresses are always right-shifted by 1. */ | |
814 | value >>= 1; | |
815 | --value; /* Correct PC. */ | |
adde6300 AM |
816 | |
817 | if (value < -2048 || value > 2047) | |
818 | { | |
b170af93 | 819 | if (avr_mcu->isa & AVR_ISA_WRAP) |
adde6300 AM |
820 | { |
821 | if (value > 2047) | |
822 | value -= 4096; | |
823 | else | |
824 | value += 4096; | |
825 | } | |
826 | else | |
827 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
828 | _("operand out of range: %ld"), value); | |
829 | } | |
830 | ||
831 | value &= 0xfff; | |
832 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
833 | break; | |
834 | ||
835 | case BFD_RELOC_32: | |
836 | bfd_putl16 ((bfd_vma) value, where); | |
837 | break; | |
838 | ||
839 | case BFD_RELOC_16: | |
840 | bfd_putl16 ((bfd_vma) value, where); | |
841 | break; | |
842 | ||
843 | case BFD_RELOC_AVR_16_PM: | |
844 | bfd_putl16 ((bfd_vma) (value>>1), where); | |
845 | break; | |
846 | ||
847 | case BFD_RELOC_AVR_LO8_LDI: | |
848 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
849 | break; | |
850 | ||
851 | case -BFD_RELOC_AVR_LO8_LDI: | |
852 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
853 | break; | |
854 | ||
855 | case BFD_RELOC_AVR_HI8_LDI: | |
856 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where); | |
857 | break; | |
858 | ||
859 | case -BFD_RELOC_AVR_HI8_LDI: | |
860 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where); | |
861 | break; | |
862 | ||
863 | case BFD_RELOC_AVR_HH8_LDI: | |
864 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
865 | break; | |
866 | ||
867 | case BFD_RELOC_AVR_LO8_LDI_NEG: | |
868 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where); | |
869 | break; | |
870 | ||
871 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
872 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
873 | break; | |
874 | ||
875 | case BFD_RELOC_AVR_HI8_LDI_NEG: | |
876 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where); | |
877 | break; | |
878 | ||
879 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
880 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where); | |
881 | break; | |
882 | ||
883 | case BFD_RELOC_AVR_HH8_LDI_NEG: | |
884 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
885 | break; | |
886 | ||
887 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
888 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where); | |
889 | break; | |
890 | ||
891 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
892 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where); | |
893 | break; | |
894 | ||
895 | case BFD_RELOC_AVR_HH8_LDI_PM: | |
896 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where); | |
897 | break; | |
898 | ||
899 | case BFD_RELOC_AVR_LO8_LDI_PM_NEG: | |
900 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where); | |
901 | break; | |
902 | ||
903 | case BFD_RELOC_AVR_HI8_LDI_PM_NEG: | |
904 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where); | |
905 | break; | |
906 | ||
907 | case BFD_RELOC_AVR_HH8_LDI_PM_NEG: | |
908 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where); | |
909 | break; | |
910 | ||
911 | case BFD_RELOC_AVR_CALL: | |
912 | { | |
913 | unsigned long x; | |
914 | x = bfd_getl16 (where); | |
915 | if (value & 1) | |
916 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
917 | _("odd address operand: %ld"), value); | |
918 | value >>= 1; | |
919 | x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16; | |
920 | bfd_putl16 ((bfd_vma) x, where); | |
921 | bfd_putl16 ((bfd_vma) (value & 0xffff), where+2); | |
922 | } | |
923 | break; | |
924 | ||
925 | default: | |
926 | as_fatal ( _("line %d: unknown relocation type: 0x%x"), | |
927 | fixp->fx_line, fixp->fx_r_type); | |
928 | break; | |
929 | } | |
930 | } | |
931 | else | |
932 | { | |
933 | switch (fixp->fx_r_type) | |
934 | { | |
935 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
936 | case -BFD_RELOC_AVR_HI8_LDI: | |
937 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
938 | case -BFD_RELOC_AVR_LO8_LDI: | |
939 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
940 | _("only constant expression allowed")); | |
941 | fixp->fx_done = 1; | |
942 | break; | |
943 | default: | |
944 | break; | |
945 | } | |
946 | fixp->fx_addnumber = value; | |
947 | } | |
948 | return 0; | |
949 | } | |
950 | ||
951 | ||
952 | /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS | |
953 | will pass the resulting reloc to `bfd_install_relocation'. This | |
954 | currently works poorly, as `bfd_install_relocation' often does the | |
955 | wrong thing, and instances of `tc_gen_reloc' have been written to | |
956 | work around the problems, which in turns makes it difficult to fix | |
957 | `bfd_install_relocation'. */ | |
958 | ||
959 | /* If while processing a fixup, a reloc really needs to be created | |
960 | then it is done here. */ | |
961 | ||
962 | arelent * | |
963 | tc_gen_reloc (seg, fixp) | |
df136245 | 964 | asection *seg ATTRIBUTE_UNUSED; |
adde6300 AM |
965 | fixS *fixp; |
966 | { | |
967 | arelent *reloc; | |
968 | ||
969 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
970 | ||
971 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
972 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
973 | ||
974 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
975 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
976 | if (reloc->howto == (reloc_howto_type *) NULL) | |
977 | { | |
978 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
979 | _("reloc %d not supported by object file format"), | |
980 | (int)fixp->fx_r_type); | |
981 | return NULL; | |
982 | } | |
983 | ||
984 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
985 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
986 | reloc->address = fixp->fx_offset; | |
987 | ||
988 | reloc->addend = fixp->fx_offset; | |
989 | ||
990 | return reloc; | |
991 | } | |
992 | ||
993 | ||
994 | void | |
995 | md_assemble (str) | |
996 | char *str; | |
997 | { | |
998 | struct avr_opcodes_s * opcode; | |
999 | char op[11]; | |
1000 | ||
df136245 | 1001 | str = skip_space (extract_word (str, op, sizeof(op))); |
adde6300 AM |
1002 | |
1003 | if (!op[0]) | |
1004 | as_bad (_ ("can't find opcode ")); | |
1005 | ||
1006 | opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op); | |
1007 | ||
1008 | if (opcode == NULL) | |
1009 | { | |
1010 | as_bad (_ ("unknown opcode `%s'"), op); | |
1011 | return; | |
1012 | } | |
1013 | ||
b170af93 | 1014 | /* Special case for opcodes with optional operands (lpm, elpm) - |
1188e082 | 1015 | version with operands exists in avr_opcodes[] in the next entry. */ |
b170af93 | 1016 | |
1188e082 DC |
1017 | if (*str && *opcode->constraints == '?') |
1018 | ++opcode; | |
b170af93 | 1019 | |
adde6300 AM |
1020 | if ((opcode->isa & avr_mcu->isa) != opcode->isa) |
1021 | as_bad (_ ("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name); | |
1022 | ||
1023 | /* We used to set input_line_pointer to the result of get_operands, | |
1024 | but that is wrong. Our caller assumes we don't change it. */ | |
1025 | { | |
1026 | char *t = input_line_pointer; | |
1027 | avr_operands (opcode, &str); | |
b170af93 | 1028 | if (*skip_space (str)) |
adde6300 AM |
1029 | as_bad (_ ("garbage at end of line")); |
1030 | input_line_pointer = t; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /* Parse ordinary expression. */ | |
1035 | static char * | |
1036 | parse_exp (s, op) | |
1037 | char *s; | |
1038 | expressionS * op; | |
1039 | { | |
1040 | input_line_pointer = s; | |
1041 | expression (op); | |
1042 | if (op->X_op == O_absent) | |
1043 | as_bad (_("missing operand")); | |
1044 | return input_line_pointer; | |
1045 | } | |
1046 | ||
1047 | ||
1048 | /* Parse special expressions (needed for LDI command): | |
1049 | xx8 (address) | |
1050 | xx8 (-address) | |
1051 | pm_xx8 (address) | |
1052 | pm_xx8 (-address) | |
1053 | where xx is: hh, hi, lo | |
1054 | */ | |
1055 | static bfd_reloc_code_real_type | |
1056 | avr_ldi_expression (exp) | |
1057 | expressionS *exp; | |
1058 | { | |
1059 | char *str = input_line_pointer; | |
1060 | char *tmp; | |
1061 | char op[8]; | |
1062 | int mod; | |
1063 | tmp = str; | |
1064 | ||
1065 | str = extract_word (str, op, sizeof (op)); | |
1066 | if (op[0]) | |
1067 | { | |
1068 | mod = (int) hash_find (avr_mod_hash, op); | |
1069 | if (mod) | |
1070 | { | |
1071 | int closes = 0; | |
1072 | mod -= 10; | |
1073 | str = skip_space (str); | |
1074 | if (*str == '(') | |
1075 | { | |
1076 | int neg_p = 0; | |
1077 | ++str; | |
1078 | if (strncmp ("pm(", str, 3) == 0 | |
1079 | || strncmp ("-(pm(", str, 5) == 0) | |
1080 | { | |
1081 | if (HAVE_PM_P(mod)) | |
1082 | { | |
1083 | ++mod; | |
1084 | ++closes; | |
1085 | } | |
1086 | else | |
1087 | as_bad (_ ("illegal expression")); | |
1088 | if (*str == '-') | |
1089 | { | |
1090 | neg_p = 1; | |
1091 | ++closes; | |
1092 | str += 5; | |
1093 | } | |
1094 | else | |
1095 | str += 3; | |
1096 | } | |
1097 | if (*str == '-' && *(str + 1) == '(') | |
1098 | { | |
1099 | neg_p ^= 1; | |
1100 | ++closes; | |
1101 | str += 2; | |
1102 | } | |
1103 | input_line_pointer = str; | |
1104 | expression (exp); | |
1105 | do | |
1106 | { | |
1107 | if (*input_line_pointer != ')') | |
1108 | { | |
1109 | as_bad (_ ("`)' required")); | |
1110 | break; | |
1111 | } | |
1112 | input_line_pointer++; | |
1113 | } | |
1114 | while (closes--); | |
1115 | return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod); | |
1116 | } | |
1117 | } | |
1118 | } | |
1119 | input_line_pointer = tmp; | |
1120 | expression (exp); | |
1121 | return BFD_RELOC_AVR_LO8_LDI; | |
1122 | } | |
1123 | ||
1124 | /* Flag to pass `pm' mode between `avr_parse_cons_expression' and | |
1125 | `avr_cons_fix_new' */ | |
1126 | static int exp_mod_pm = 0; | |
1127 | ||
1128 | /* Parse special CONS expression: pm (expression) | |
1129 | which is used for addressing to a program memory. | |
1130 | Relocation: BFD_RELOC_AVR_16_PM */ | |
1131 | void | |
1132 | avr_parse_cons_expression (exp, nbytes) | |
1133 | expressionS *exp; | |
1134 | int nbytes; | |
1135 | { | |
1136 | char * tmp; | |
1137 | ||
1138 | exp_mod_pm = 0; | |
1139 | ||
1140 | tmp = input_line_pointer = skip_space (input_line_pointer); | |
1141 | ||
1142 | if (nbytes == 2) | |
1143 | { | |
1144 | char * pm_name = "pm"; | |
1145 | int len = strlen (pm_name); | |
1146 | if (strncasecmp (input_line_pointer, pm_name, len) == 0) | |
1147 | { | |
1148 | input_line_pointer = skip_space (input_line_pointer + len); | |
1149 | if (*input_line_pointer == '(') | |
1150 | { | |
1151 | input_line_pointer = skip_space (input_line_pointer + 1); | |
1152 | exp_mod_pm = 1; | |
1153 | expression (exp); | |
1154 | if (*input_line_pointer == ')') | |
1155 | ++input_line_pointer; | |
1156 | else | |
1157 | { | |
1158 | as_bad (_ ("`)' required")); | |
1159 | exp_mod_pm = 0; | |
1160 | } | |
1161 | return; | |
1162 | } | |
1163 | input_line_pointer = tmp; | |
1164 | } | |
1165 | } | |
1166 | expression (exp); | |
1167 | } | |
1168 | ||
1169 | void | |
1170 | avr_cons_fix_new(frag, where, nbytes, exp) | |
1171 | fragS *frag; | |
1172 | int where; | |
1173 | int nbytes; | |
1174 | expressionS *exp; | |
1175 | { | |
1176 | if (exp_mod_pm == 0) | |
1177 | { | |
1178 | if (nbytes == 2) | |
1179 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_16); | |
1180 | else if (nbytes == 4) | |
1181 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_32); | |
1182 | else | |
1183 | as_bad (_ ("illegal %srelocation size: %d"), "", nbytes); | |
1184 | } | |
1185 | else | |
1186 | { | |
1187 | if (nbytes == 2) | |
1188 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_AVR_16_PM); | |
1189 | else | |
1190 | as_bad (_ ("illegal %srelocation size: %d"), "`pm' ", nbytes); | |
1191 | exp_mod_pm = 0; | |
1192 | } | |
1193 | } |