Commit | Line | Data |
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adde6300 AM |
1 | /* tc-avr.c -- Assembler code for the ATMEL AVR |
2 | ||
3882b010 | 3 | Copyright 1999, 2000, 2001 Free Software Foundation, Inc. |
adde6300 AM |
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> | |
adde6300 | 24 | #include "as.h" |
3882b010 | 25 | #include "safe-ctype.h" |
adde6300 AM |
26 | #include "subsegs.h" |
27 | ||
1188e082 DC |
28 | struct avr_opcodes_s |
29 | { | |
30 | char *name; | |
31 | char *constraints; | |
c6a7ab1f | 32 | int insn_size; /* In words. */ |
1188e082 DC |
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 | ||
adde6300 AM |
46 | const char comment_chars[] = ";"; |
47 | const char line_comment_chars[] = "#"; | |
48 | const char line_separator_chars[] = "$"; | |
49 | ||
adde6300 AM |
50 | const char *md_shortopts = "m:"; |
51 | struct mcu_type_s | |
52 | { | |
53 | char *name; | |
54 | int isa; | |
55 | int mach; | |
56 | }; | |
57 | ||
1f8ae5e6 DC |
58 | /* XXX - devices that don't seem to exist (renamed, replaced with larger |
59 | ones, or planned but never produced), left here for compatibility. | |
60 | TODO: hide them in show_mcu_list output? */ | |
61 | ||
adde6300 AM |
62 | static struct mcu_type_s mcu_types[] = |
63 | { | |
b170af93 | 64 | {"avr1", AVR_ISA_TINY1, bfd_mach_avr1}, |
65aa24b6 | 65 | {"avr2", AVR_ISA_2xxx, bfd_mach_avr2}, |
b170af93 | 66 | {"avr3", AVR_ISA_M103, bfd_mach_avr3}, |
1f8ae5e6 | 67 | {"avr4", AVR_ISA_M8, bfd_mach_avr4}, |
65aa24b6 | 68 | {"avr5", AVR_ISA_ALL, bfd_mach_avr5}, |
adde6300 | 69 | {"at90s1200", AVR_ISA_1200, bfd_mach_avr1}, |
1f8ae5e6 | 70 | {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */ |
b170af93 DC |
71 | {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1}, |
72 | {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1}, | |
73 | {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1}, | |
74 | {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1}, | |
adde6300 AM |
75 | {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2}, |
76 | {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2}, | |
1f8ae5e6 | 77 | {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */ |
adde6300 AM |
78 | {"attiny22" , AVR_ISA_2xxx, bfd_mach_avr2}, |
79 | {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2}, | |
80 | {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2}, | |
1f8ae5e6 DC |
81 | {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */ |
82 | {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */ | |
65aa24b6 NC |
83 | {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2}, |
84 | {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2}, | |
85 | {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2}, | |
1f8ae5e6 | 86 | {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */ |
b170af93 | 87 | {"atmega103", AVR_ISA_M103, bfd_mach_avr3}, |
1f8ae5e6 DC |
88 | {"at43usb320",AVR_ISA_M103, bfd_mach_avr3}, |
89 | {"at76c711", AVR_ISA_M603, bfd_mach_avr3}, | |
90 | {"atmega8", AVR_ISA_M8, bfd_mach_avr4}, | |
91 | {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m163 */ | |
92 | {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */ | |
93 | {"atmega16", AVR_ISA_M323, bfd_mach_avr5}, | |
65aa24b6 NC |
94 | {"atmega161", AVR_ISA_M161, bfd_mach_avr5}, |
95 | {"atmega163", AVR_ISA_M161, bfd_mach_avr5}, | |
1f8ae5e6 DC |
96 | {"atmega32", AVR_ISA_M323, bfd_mach_avr5}, |
97 | {"atmega323", AVR_ISA_M323, bfd_mach_avr5}, | |
98 | {"atmega64", AVR_ISA_M323, bfd_mach_avr5}, | |
99 | {"atmega128", AVR_ISA_M128, bfd_mach_avr5}, | |
100 | {"at43usb355",AVR_ISA_94K, bfd_mach_avr5}, | |
65aa24b6 | 101 | {"at94k", AVR_ISA_94K, bfd_mach_avr5}, |
adde6300 AM |
102 | {NULL, 0, 0} |
103 | }; | |
104 | ||
adde6300 AM |
105 | /* Current MCU type. */ |
106 | static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2}; | |
107 | static struct mcu_type_s *avr_mcu = &default_mcu; | |
108 | ||
00d2865b NC |
109 | /* AVR target-specific switches. */ |
110 | struct avr_opt_s | |
111 | { | |
c6a7ab1f NC |
112 | int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes */ |
113 | int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns */ | |
114 | int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around */ | |
00d2865b NC |
115 | }; |
116 | ||
117 | static struct avr_opt_s avr_opt = { 0, 0, 0 }; | |
118 | ||
adde6300 AM |
119 | const char EXP_CHARS[] = "eE"; |
120 | const char FLT_CHARS[] = "dD"; | |
121 | static void avr_set_arch (int dummy); | |
122 | ||
123 | /* The target specific pseudo-ops which we support. */ | |
124 | const pseudo_typeS md_pseudo_table[] = | |
125 | { | |
126 | {"arch", avr_set_arch, 0}, | |
127 | { NULL, NULL, 0} | |
128 | }; | |
129 | ||
130 | #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00)) | |
adde6300 | 131 | |
65b1d096 DC |
132 | static void show_mcu_list PARAMS ((FILE *)); |
133 | static char *skip_space PARAMS ((char *)); | |
134 | static char *extract_word PARAMS ((char *, char *, int)); | |
135 | static unsigned int avr_operand PARAMS ((struct avr_opcodes_s *, | |
136 | int, char *, char **)); | |
137 | static unsigned int avr_operands PARAMS ((struct avr_opcodes_s *, char **)); | |
138 | static unsigned int avr_get_constant PARAMS ((char *, int)); | |
139 | static char *parse_exp PARAMS ((char *, expressionS *)); | |
140 | static bfd_reloc_code_real_type avr_ldi_expression PARAMS ((expressionS *)); | |
adde6300 | 141 | |
adde6300 AM |
142 | #define EXP_MOD_NAME(i) exp_mod[i].name |
143 | #define EXP_MOD_RELOC(i) exp_mod[i].reloc | |
144 | #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc | |
145 | #define HAVE_PM_P(i) exp_mod[i].have_pm | |
146 | ||
147 | struct exp_mod_s | |
148 | { | |
c6a7ab1f | 149 | char *name; |
adde6300 AM |
150 | bfd_reloc_code_real_type reloc; |
151 | bfd_reloc_code_real_type neg_reloc; | |
152 | int have_pm; | |
153 | }; | |
154 | ||
c6a7ab1f NC |
155 | static struct exp_mod_s exp_mod[] = |
156 | { | |
adde6300 AM |
157 | {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1}, |
158 | {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0}, | |
159 | {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1}, | |
160 | {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0}, | |
161 | {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1}, | |
162 | {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0}, | |
163 | {"hlo8", -BFD_RELOC_AVR_LO8_LDI, -BFD_RELOC_AVR_LO8_LDI_NEG, 0}, | |
164 | {"hhi8", -BFD_RELOC_AVR_HI8_LDI, -BFD_RELOC_AVR_HI8_LDI_NEG, 0}, | |
165 | }; | |
166 | ||
167 | /* Opcode hash table. */ | |
168 | static struct hash_control *avr_hash; | |
169 | ||
170 | /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */ | |
171 | static struct hash_control *avr_mod_hash; | |
172 | ||
00d2865b NC |
173 | #define OPTION_MMCU 'm' |
174 | #define OPTION_ALL_OPCODES (OPTION_MD_BASE + 1) | |
175 | #define OPTION_NO_SKIP_BUG (OPTION_MD_BASE + 2) | |
176 | #define OPTION_NO_WRAP (OPTION_MD_BASE + 3) | |
adde6300 | 177 | |
c6a7ab1f NC |
178 | struct option md_longopts[] = |
179 | { | |
00d2865b NC |
180 | { "mmcu", required_argument, NULL, OPTION_MMCU }, |
181 | { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES }, | |
182 | { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG }, | |
183 | { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP }, | |
184 | { NULL, no_argument, NULL, 0 } | |
adde6300 | 185 | }; |
adde6300 | 186 | |
c6a7ab1f | 187 | size_t md_longopts_size = sizeof (md_longopts); |
00d2865b NC |
188 | |
189 | /* Display nicely formatted list of known MCU names. */ | |
c6a7ab1f | 190 | |
00d2865b | 191 | static void |
c6a7ab1f NC |
192 | show_mcu_list (stream) |
193 | FILE *stream; | |
00d2865b NC |
194 | { |
195 | int i, x; | |
196 | ||
197 | fprintf (stream, _("Known MCU names:")); | |
198 | x = 1000; | |
1dab94dd | 199 | |
00d2865b NC |
200 | for (i = 0; mcu_types[i].name; i++) |
201 | { | |
202 | int len = strlen (mcu_types[i].name); | |
1dab94dd | 203 | |
00d2865b | 204 | x += len + 1; |
1dab94dd | 205 | |
00d2865b | 206 | if (x < 75) |
c6a7ab1f | 207 | fprintf (stream, " %s", mcu_types[i].name); |
00d2865b NC |
208 | else |
209 | { | |
210 | fprintf (stream, "\n %s", mcu_types[i].name); | |
211 | x = len + 2; | |
212 | } | |
213 | } | |
1dab94dd | 214 | |
c6a7ab1f | 215 | fprintf (stream, "\n"); |
00d2865b NC |
216 | } |
217 | ||
adde6300 AM |
218 | static inline char * |
219 | skip_space (s) | |
c6a7ab1f | 220 | char *s; |
adde6300 AM |
221 | { |
222 | while (*s == ' ' || *s == '\t') | |
223 | ++s; | |
224 | return s; | |
225 | } | |
226 | ||
227 | /* Extract one word from FROM and copy it to TO. */ | |
c6a7ab1f | 228 | |
adde6300 AM |
229 | static char * |
230 | extract_word (char *from, char *to, int limit) | |
231 | { | |
232 | char *op_start; | |
233 | char *op_end; | |
234 | int size = 0; | |
235 | ||
236 | /* Drop leading whitespace. */ | |
237 | from = skip_space (from); | |
238 | *to = 0; | |
c6a7ab1f | 239 | |
adde6300 | 240 | /* Find the op code end. */ |
c6a7ab1f | 241 | for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);) |
adde6300 AM |
242 | { |
243 | to[size++] = *op_end++; | |
244 | if (size + 1 >= limit) | |
245 | break; | |
246 | } | |
1dab94dd | 247 | |
adde6300 AM |
248 | to[size] = 0; |
249 | return op_end; | |
250 | } | |
251 | ||
252 | int | |
253 | md_estimate_size_before_relax (fragp, seg) | |
df136245 DC |
254 | fragS *fragp ATTRIBUTE_UNUSED; |
255 | asection *seg ATTRIBUTE_UNUSED; | |
adde6300 AM |
256 | { |
257 | abort (); | |
258 | return 0; | |
259 | } | |
260 | ||
261 | void | |
262 | md_show_usage (stream) | |
c6a7ab1f | 263 | FILE *stream; |
adde6300 | 264 | { |
00d2865b NC |
265 | fprintf (stream, |
266 | _("AVR options:\n" | |
adde6300 AM |
267 | " -mmcu=[avr-name] select microcontroller variant\n" |
268 | " [avr-name] can be:\n" | |
65aa24b6 NC |
269 | " avr1 - AT90S1200, ATtiny1x, ATtiny28\n" |
270 | " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n" | |
271 | " avr3 - ATmega103, ATmega603\n" | |
272 | " avr4 - ATmega83, ATmega85\n" | |
273 | " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n" | |
adde6300 | 274 | " or immediate microcontroller name.\n")); |
00d2865b NC |
275 | fprintf (stream, |
276 | _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n" | |
277 | " -mno-skip-bug disable warnings for skipping two-word instructions\n" | |
278 | " (default for avr4, avr5)\n" | |
279 | " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n" | |
280 | " (default for avr3, avr5)\n")); | |
281 | show_mcu_list (stream); | |
adde6300 AM |
282 | } |
283 | ||
284 | static void | |
285 | avr_set_arch (dummy) | |
df136245 | 286 | int dummy ATTRIBUTE_UNUSED; |
adde6300 | 287 | { |
c6a7ab1f | 288 | char *str; |
1dab94dd | 289 | |
c6a7ab1f | 290 | str = (char *) alloca (20); |
adde6300 | 291 | input_line_pointer = extract_word (input_line_pointer, str, 20); |
00d2865b | 292 | md_parse_option (OPTION_MMCU, str); |
adde6300 AM |
293 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
294 | } | |
295 | ||
296 | int | |
297 | md_parse_option (c, arg) | |
298 | int c; | |
299 | char *arg; | |
300 | { | |
00d2865b | 301 | switch (c) |
adde6300 | 302 | { |
00d2865b NC |
303 | case OPTION_MMCU: |
304 | { | |
305 | int i; | |
306 | char *s = alloca (strlen (arg) + 1); | |
adde6300 | 307 | |
00d2865b NC |
308 | { |
309 | char *t = s; | |
310 | char *arg1 = arg; | |
311 | ||
312 | do | |
3882b010 | 313 | *t = TOLOWER (*arg1++); |
00d2865b NC |
314 | while (*t++); |
315 | } | |
316 | ||
317 | for (i = 0; mcu_types[i].name; ++i) | |
318 | if (strcmp (mcu_types[i].name, s) == 0) | |
319 | break; | |
adde6300 | 320 | |
00d2865b NC |
321 | if (!mcu_types[i].name) |
322 | { | |
323 | show_mcu_list (stderr); | |
324 | as_fatal (_("unknown MCU: %s\n"), arg); | |
325 | } | |
65aa24b6 | 326 | |
00d2865b NC |
327 | /* It is OK to redefine mcu type within the same avr[1-5] bfd machine |
328 | type - this for allows passing -mmcu=... via gcc ASM_SPEC as well | |
329 | as .arch ... in the asm output at the same time. */ | |
00d2865b NC |
330 | if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach) |
331 | avr_mcu = &mcu_types[i]; | |
332 | else | |
333 | as_fatal (_("redefinition of mcu type `%s' to `%s'"), | |
334 | avr_mcu->name, mcu_types[i].name); | |
335 | return 1; | |
336 | } | |
337 | case OPTION_ALL_OPCODES: | |
338 | avr_opt.all_opcodes = 1; | |
339 | return 1; | |
340 | case OPTION_NO_SKIP_BUG: | |
341 | avr_opt.no_skip_bug = 1; | |
342 | return 1; | |
343 | case OPTION_NO_WRAP: | |
344 | avr_opt.no_wrap = 1; | |
adde6300 AM |
345 | return 1; |
346 | } | |
1dab94dd | 347 | |
adde6300 AM |
348 | return 0; |
349 | } | |
350 | ||
351 | symbolS * | |
c6a7ab1f | 352 | md_undefined_symbol (name) |
df136245 | 353 | char *name ATTRIBUTE_UNUSED; |
adde6300 AM |
354 | { |
355 | return 0; | |
356 | } | |
357 | ||
c6a7ab1f NC |
358 | /* Turn a string in input_line_pointer into a floating point constant |
359 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
360 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
361 | returned, or NULL on OK. */ | |
362 | ||
adde6300 AM |
363 | char * |
364 | md_atof (type, litP, sizeP) | |
365 | int type; | |
366 | char *litP; | |
367 | int *sizeP; | |
368 | { | |
369 | int prec; | |
370 | LITTLENUM_TYPE words[4]; | |
371 | LITTLENUM_TYPE *wordP; | |
372 | char *t; | |
373 | ||
374 | switch (type) | |
375 | { | |
376 | case 'f': | |
377 | prec = 2; | |
378 | break; | |
379 | case 'd': | |
380 | prec = 4; | |
381 | break; | |
382 | default: | |
383 | *sizeP = 0; | |
384 | return _("bad call to md_atof"); | |
385 | } | |
386 | ||
387 | t = atof_ieee (input_line_pointer, type, words); | |
388 | if (t) | |
389 | input_line_pointer = t; | |
390 | ||
391 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1dab94dd | 392 | |
adde6300 AM |
393 | /* This loop outputs the LITTLENUMs in REVERSE order. */ |
394 | for (wordP = words + prec - 1; prec--;) | |
395 | { | |
396 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
397 | litP += sizeof (LITTLENUM_TYPE); | |
398 | } | |
1dab94dd | 399 | |
adde6300 AM |
400 | return NULL; |
401 | } | |
402 | ||
403 | void | |
404 | md_convert_frag (abfd, sec, fragP) | |
c6a7ab1f NC |
405 | bfd *abfd ATTRIBUTE_UNUSED; |
406 | asection *sec ATTRIBUTE_UNUSED; | |
407 | fragS *fragP ATTRIBUTE_UNUSED; | |
adde6300 AM |
408 | { |
409 | abort (); | |
410 | } | |
411 | ||
adde6300 AM |
412 | void |
413 | md_begin () | |
414 | { | |
df136245 | 415 | unsigned int i; |
adde6300 | 416 | struct avr_opcodes_s *opcode; |
c6a7ab1f | 417 | avr_hash = hash_new (); |
adde6300 AM |
418 | |
419 | /* Insert unique names into hash table. This hash table then provides a | |
420 | quick index to the first opcode with a particular name in the opcode | |
421 | table. */ | |
adde6300 AM |
422 | for (opcode = avr_opcodes; opcode->name; opcode++) |
423 | hash_insert (avr_hash, opcode->name, (char *) opcode); | |
424 | ||
425 | avr_mod_hash = hash_new (); | |
426 | ||
427 | for (i = 0; i < sizeof (exp_mod) / sizeof (exp_mod[0]); ++i) | |
c6a7ab1f NC |
428 | hash_insert (avr_mod_hash, EXP_MOD_NAME (i), (void *) (i + 10)); |
429 | ||
adde6300 AM |
430 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
431 | } | |
432 | ||
df136245 | 433 | /* Resolve STR as a constant expression and return the result. |
c6a7ab1f | 434 | If result greater than MAX then error. */ |
df136245 DC |
435 | |
436 | static unsigned int | |
437 | avr_get_constant (str, max) | |
c6a7ab1f | 438 | char *str; |
df136245 DC |
439 | int max; |
440 | { | |
441 | expressionS ex; | |
442 | str = skip_space (str); | |
443 | input_line_pointer = str; | |
444 | expression (&ex); | |
445 | ||
446 | if (ex.X_op != O_constant) | |
447 | as_bad (_("constant value required")); | |
448 | ||
449 | if (ex.X_add_number > max || ex.X_add_number < 0) | |
c6a7ab1f | 450 | as_bad (_("number must be less than %d"), max + 1); |
1dab94dd | 451 | |
df136245 DC |
452 | return ex.X_add_number; |
453 | } | |
454 | ||
df136245 | 455 | /* Parse instruction operands. |
c6a7ab1f | 456 | Return binary opcode. */ |
df136245 | 457 | |
adde6300 AM |
458 | static unsigned int |
459 | avr_operands (opcode, line) | |
460 | struct avr_opcodes_s *opcode; | |
461 | char **line; | |
462 | { | |
463 | char *op = opcode->constraints; | |
464 | unsigned int bin = opcode->bin_opcode; | |
465 | char *frag = frag_more (opcode->insn_size * 2); | |
466 | char *str = *line; | |
467 | int where = frag - frag_now->fr_literal; | |
c6a7ab1f | 468 | static unsigned int prev = 0; /* Previous opcode. */ |
adde6300 AM |
469 | |
470 | /* Opcode have operands. */ | |
471 | if (*op) | |
472 | { | |
473 | unsigned int reg1 = 0; | |
474 | unsigned int reg2 = 0; | |
475 | int reg1_present = 0; | |
476 | int reg2_present = 0; | |
477 | ||
478 | /* Parse first operand. */ | |
479 | if (REGISTER_P (*op)) | |
480 | reg1_present = 1; | |
481 | reg1 = avr_operand (opcode, where, op, &str); | |
482 | ++op; | |
483 | ||
484 | /* Parse second operand. */ | |
485 | if (*op) | |
486 | { | |
487 | if (*op == ',') | |
488 | ++op; | |
1dab94dd | 489 | |
adde6300 AM |
490 | if (*op == '=') |
491 | { | |
492 | reg2 = reg1; | |
493 | reg2_present = 1; | |
494 | } | |
495 | else | |
496 | { | |
497 | if (REGISTER_P (*op)) | |
498 | reg2_present = 1; | |
499 | ||
500 | str = skip_space (str); | |
501 | if (*str++ != ',') | |
00d2865b | 502 | as_bad (_("`,' required")); |
adde6300 AM |
503 | str = skip_space (str); |
504 | ||
505 | reg2 = avr_operand (opcode, where, op, &str); | |
506 | ||
507 | } | |
1dab94dd | 508 | |
adde6300 AM |
509 | if (reg1_present && reg2_present) |
510 | reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200); | |
511 | else if (reg2_present) | |
512 | reg2 <<= 4; | |
513 | } | |
514 | if (reg1_present) | |
515 | reg1 <<= 4; | |
516 | bin |= reg1 | reg2; | |
517 | } | |
b170af93 | 518 | |
65b1d096 DC |
519 | /* Detect undefined combinations (like ld r31,Z+). */ |
520 | if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin)) | |
521 | as_warn (_("undefined combination of operands")); | |
00d2865b | 522 | |
adde6300 AM |
523 | if (opcode->insn_size == 2) |
524 | { | |
00d2865b NC |
525 | /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs |
526 | (AVR core bug, fixed in the newer devices). */ | |
527 | ||
65b1d096 DC |
528 | if (!(avr_opt.no_skip_bug || (avr_mcu->isa & AVR_ISA_MUL)) |
529 | && AVR_SKIP_P (prev)) | |
530 | as_warn (_("skipping two-word instruction")); | |
00d2865b | 531 | |
c6a7ab1f | 532 | bfd_putl32 ((bfd_vma) bin, frag); |
adde6300 AM |
533 | } |
534 | else | |
c6a7ab1f | 535 | bfd_putl16 ((bfd_vma) bin, frag); |
b170af93 DC |
536 | |
537 | prev = bin; | |
adde6300 AM |
538 | *line = str; |
539 | return bin; | |
540 | } | |
541 | ||
df136245 | 542 | /* Parse one instruction operand. |
c6a7ab1f NC |
543 | Return operand bitmask. Also fixups can be generated. */ |
544 | ||
adde6300 AM |
545 | static unsigned int |
546 | avr_operand (opcode, where, op, line) | |
547 | struct avr_opcodes_s *opcode; | |
548 | int where; | |
549 | char *op; | |
550 | char **line; | |
551 | { | |
adde6300 | 552 | expressionS op_expr; |
df136245 DC |
553 | unsigned int op_mask = 0; |
554 | char *str = skip_space (*line); | |
adde6300 | 555 | |
adde6300 AM |
556 | switch (*op) |
557 | { | |
558 | /* Any register operand. */ | |
559 | case 'w': | |
560 | case 'd': | |
561 | case 'r': | |
b170af93 DC |
562 | case 'a': |
563 | case 'v': | |
c6a7ab1f NC |
564 | if (*str == 'r' || *str == 'R') |
565 | { | |
566 | char r_name[20]; | |
1dab94dd | 567 | |
c6a7ab1f | 568 | str = extract_word (str, r_name, sizeof (r_name)); |
65b1d096 | 569 | op_mask = 0xff; |
3882b010 | 570 | if (ISDIGIT (r_name[1])) |
c6a7ab1f NC |
571 | { |
572 | if (r_name[2] == '\0') | |
573 | op_mask = r_name[1] - '0'; | |
574 | else if (r_name[1] != '0' | |
3882b010 | 575 | && ISDIGIT (r_name[2]) |
c6a7ab1f NC |
576 | && r_name[3] == '\0') |
577 | op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; | |
578 | } | |
579 | } | |
580 | else | |
581 | { | |
582 | op_mask = avr_get_constant (str, 31); | |
583 | str = input_line_pointer; | |
584 | } | |
1dab94dd | 585 | |
c6a7ab1f NC |
586 | if (op_mask <= 31) |
587 | { | |
588 | switch (*op) | |
589 | { | |
590 | case 'a': | |
591 | if (op_mask < 16 || op_mask > 23) | |
592 | as_bad (_("register r16-r23 required")); | |
593 | op_mask -= 16; | |
594 | break; | |
1dab94dd | 595 | |
c6a7ab1f NC |
596 | case 'd': |
597 | if (op_mask < 16) | |
598 | as_bad (_("register number above 15 required")); | |
599 | op_mask -= 16; | |
600 | break; | |
1dab94dd | 601 | |
c6a7ab1f NC |
602 | case 'v': |
603 | if (op_mask & 1) | |
604 | as_bad (_("even register number required")); | |
605 | op_mask >>= 1; | |
606 | break; | |
1dab94dd | 607 | |
c6a7ab1f | 608 | case 'w': |
65b1d096 | 609 | if ((op_mask & 1) || op_mask < 24) |
c6a7ab1f | 610 | as_bad (_("register r24, r26, r28 or r30 required")); |
65b1d096 | 611 | op_mask = (op_mask - 24) >> 1; |
c6a7ab1f NC |
612 | break; |
613 | } | |
614 | break; | |
615 | } | |
616 | as_bad (_("register name or number from 0 to 31 required")); | |
adde6300 AM |
617 | break; |
618 | ||
619 | case 'e': | |
620 | { | |
621 | char c; | |
1dab94dd | 622 | |
adde6300 AM |
623 | if (*str == '-') |
624 | { | |
c6a7ab1f | 625 | str = skip_space (str + 1); |
adde6300 AM |
626 | op_mask = 0x1002; |
627 | } | |
3882b010 | 628 | c = TOLOWER (*str); |
adde6300 AM |
629 | if (c == 'x') |
630 | op_mask |= 0x100c; | |
631 | else if (c == 'y') | |
632 | op_mask |= 0x8; | |
633 | else if (c != 'z') | |
00d2865b | 634 | as_bad (_("pointer register (X, Y or Z) required")); |
adde6300 | 635 | |
c6a7ab1f | 636 | str = skip_space (str + 1); |
adde6300 AM |
637 | if (*str == '+') |
638 | { | |
639 | ++str; | |
640 | if (op_mask & 2) | |
00d2865b | 641 | as_bad (_("cannot both predecrement and postincrement")); |
adde6300 AM |
642 | op_mask |= 0x1001; |
643 | } | |
e38c9cc2 | 644 | |
1188e082 | 645 | /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer |
e38c9cc2 | 646 | registers, no predecrement, no postincrement. */ |
00d2865b NC |
647 | if (!avr_opt.all_opcodes && (op_mask & 0x100F) |
648 | && !(avr_mcu->isa & AVR_ISA_SRAM)) | |
649 | as_bad (_("addressing mode not supported")); | |
adde6300 AM |
650 | } |
651 | break; | |
652 | ||
b170af93 | 653 | case 'z': |
c6a7ab1f NC |
654 | if (*str == '-') |
655 | as_bad (_("can't predecrement")); | |
1dab94dd | 656 | |
c6a7ab1f NC |
657 | if (! (*str == 'z' || *str == 'Z')) |
658 | as_bad (_("pointer register Z required")); | |
1dab94dd | 659 | |
c6a7ab1f NC |
660 | str = skip_space (str + 1); |
661 | ||
662 | if (*str == '+') | |
663 | { | |
664 | ++str; | |
665 | op_mask |= 1; | |
666 | } | |
b170af93 DC |
667 | break; |
668 | ||
adde6300 AM |
669 | case 'b': |
670 | { | |
3882b010 | 671 | char c = TOLOWER (*str++); |
1dab94dd | 672 | |
adde6300 AM |
673 | if (c == 'y') |
674 | op_mask |= 0x8; | |
675 | else if (c != 'z') | |
00d2865b | 676 | as_bad (_("pointer register (Y or Z) required")); |
adde6300 AM |
677 | str = skip_space (str); |
678 | if (*str++ == '+') | |
679 | { | |
680 | unsigned int x; | |
681 | x = avr_get_constant (str, 63); | |
682 | str = input_line_pointer; | |
683 | op_mask |= (x & 7) | ((x & (3 << 3)) << 7) | ((x & (1 << 5)) << 8); | |
684 | } | |
685 | } | |
686 | break; | |
687 | ||
688 | case 'h': | |
c6a7ab1f NC |
689 | str = parse_exp (str, &op_expr); |
690 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
691 | &op_expr, false, BFD_RELOC_AVR_CALL); | |
adde6300 AM |
692 | break; |
693 | ||
694 | case 'L': | |
c6a7ab1f NC |
695 | str = parse_exp (str, &op_expr); |
696 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
697 | &op_expr, true, BFD_RELOC_AVR_13_PCREL); | |
adde6300 AM |
698 | break; |
699 | ||
700 | case 'l': | |
c6a7ab1f NC |
701 | str = parse_exp (str, &op_expr); |
702 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
703 | &op_expr, true, BFD_RELOC_AVR_7_PCREL); | |
adde6300 AM |
704 | break; |
705 | ||
706 | case 'i': | |
c6a7ab1f NC |
707 | str = parse_exp (str, &op_expr); |
708 | fix_new_exp (frag_now, where + 2, opcode->insn_size * 2, | |
709 | &op_expr, false, BFD_RELOC_16); | |
adde6300 AM |
710 | break; |
711 | ||
712 | case 'M': | |
713 | { | |
714 | bfd_reloc_code_real_type r_type; | |
1dab94dd | 715 | |
c6a7ab1f NC |
716 | input_line_pointer = str; |
717 | r_type = avr_ldi_expression (&op_expr); | |
718 | str = input_line_pointer; | |
adde6300 AM |
719 | fix_new_exp (frag_now, where, 3, |
720 | &op_expr, false, r_type); | |
721 | } | |
722 | break; | |
723 | ||
724 | case 'n': | |
725 | { | |
726 | unsigned int x; | |
1dab94dd | 727 | |
adde6300 AM |
728 | x = ~avr_get_constant (str, 255); |
729 | str = input_line_pointer; | |
730 | op_mask |= (x & 0xf) | ((x << 4) & 0xf00); | |
731 | } | |
732 | break; | |
733 | ||
734 | case 'K': | |
735 | { | |
736 | unsigned int x; | |
1dab94dd | 737 | |
adde6300 AM |
738 | x = avr_get_constant (str, 63); |
739 | str = input_line_pointer; | |
740 | op_mask |= (x & 0xf) | ((x & 0x30) << 2); | |
741 | } | |
742 | break; | |
743 | ||
744 | case 'S': | |
745 | case 's': | |
746 | { | |
747 | unsigned int x; | |
1dab94dd | 748 | |
adde6300 AM |
749 | x = avr_get_constant (str, 7); |
750 | str = input_line_pointer; | |
751 | if (*op == 'S') | |
752 | x <<= 4; | |
753 | op_mask |= x; | |
754 | } | |
755 | break; | |
756 | ||
757 | case 'P': | |
758 | { | |
759 | unsigned int x; | |
1dab94dd | 760 | |
adde6300 AM |
761 | x = avr_get_constant (str, 63); |
762 | str = input_line_pointer; | |
763 | op_mask |= (x & 0xf) | ((x & 0x30) << 5); | |
764 | } | |
765 | break; | |
766 | ||
767 | case 'p': | |
768 | { | |
769 | unsigned int x; | |
1dab94dd | 770 | |
adde6300 AM |
771 | x = avr_get_constant (str, 31); |
772 | str = input_line_pointer; | |
773 | op_mask |= x << 3; | |
774 | } | |
775 | break; | |
1dab94dd | 776 | |
1188e082 DC |
777 | case '?': |
778 | break; | |
1dab94dd | 779 | |
adde6300 | 780 | default: |
00d2865b | 781 | as_bad (_("unknown constraint `%c'"), *op); |
adde6300 | 782 | } |
1dab94dd | 783 | |
adde6300 AM |
784 | *line = str; |
785 | return op_mask; | |
786 | } | |
787 | ||
788 | /* GAS will call this function for each section at the end of the assembly, | |
789 | to permit the CPU backend to adjust the alignment of a section. */ | |
c6a7ab1f | 790 | |
adde6300 AM |
791 | valueT |
792 | md_section_align (seg, addr) | |
793 | asection *seg; | |
794 | valueT addr; | |
795 | { | |
796 | int align = bfd_get_section_alignment (stdoutput, seg); | |
797 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
798 | } | |
799 | ||
800 | /* If you define this macro, it should return the offset between the | |
801 | address of a PC relative fixup and the position from which the PC | |
802 | relative adjustment should be made. On many processors, the base | |
803 | of a PC relative instruction is the next instruction, so this | |
804 | macro would return the length of an instruction. */ | |
c6a7ab1f | 805 | |
adde6300 AM |
806 | long |
807 | md_pcrel_from_section (fixp, sec) | |
808 | fixS *fixp; | |
809 | segT sec; | |
810 | { | |
c6a7ab1f | 811 | if (fixp->fx_addsy != (symbolS *) NULL |
adde6300 AM |
812 | && (!S_IS_DEFINED (fixp->fx_addsy) |
813 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
814 | return 0; | |
1dab94dd | 815 | |
adde6300 AM |
816 | return fixp->fx_frag->fr_address + fixp->fx_where; |
817 | } | |
818 | ||
819 | /* GAS will call this for each fixup. It should store the correct | |
c6a7ab1f NC |
820 | value in the object file. */ |
821 | ||
adde6300 AM |
822 | int |
823 | md_apply_fix3 (fixp, valuep, seg) | |
824 | fixS *fixp; | |
825 | valueT *valuep; | |
826 | segT seg; | |
827 | { | |
828 | unsigned char *where; | |
829 | unsigned long insn; | |
830 | long value; | |
831 | ||
832 | if (fixp->fx_addsy == (symbolS *) NULL) | |
833 | { | |
834 | value = *valuep; | |
835 | fixp->fx_done = 1; | |
836 | } | |
837 | else if (fixp->fx_pcrel) | |
838 | { | |
839 | segT s = S_GET_SEGMENT (fixp->fx_addsy); | |
1dab94dd | 840 | |
adde6300 AM |
841 | if (fixp->fx_addsy && (s == seg || s == absolute_section)) |
842 | { | |
843 | value = S_GET_VALUE (fixp->fx_addsy) + *valuep; | |
844 | fixp->fx_done = 1; | |
845 | } | |
846 | else | |
847 | value = *valuep; | |
848 | } | |
849 | else | |
850 | { | |
851 | value = fixp->fx_offset; | |
1dab94dd | 852 | |
adde6300 AM |
853 | if (fixp->fx_subsy != (symbolS *) NULL) |
854 | { | |
855 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
856 | { | |
857 | value -= S_GET_VALUE (fixp->fx_subsy); | |
858 | fixp->fx_done = 1; | |
859 | } | |
860 | else | |
861 | { | |
862 | /* We don't actually support subtracting a symbol. */ | |
c6a7ab1f | 863 | as_bad_where (fixp->fx_file, fixp->fx_line, |
00d2865b | 864 | _("expression too complex")); |
adde6300 AM |
865 | } |
866 | } | |
867 | } | |
1dab94dd | 868 | |
adde6300 AM |
869 | switch (fixp->fx_r_type) |
870 | { | |
871 | default: | |
872 | fixp->fx_no_overflow = 1; | |
873 | break; | |
874 | case BFD_RELOC_AVR_7_PCREL: | |
875 | case BFD_RELOC_AVR_13_PCREL: | |
876 | case BFD_RELOC_32: | |
877 | case BFD_RELOC_16: | |
878 | case BFD_RELOC_AVR_CALL: | |
879 | break; | |
880 | } | |
881 | ||
882 | if (fixp->fx_done) | |
883 | { | |
884 | /* Fetch the instruction, insert the fully resolved operand | |
885 | value, and stuff the instruction back again. */ | |
886 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
887 | insn = bfd_getl16 (where); | |
888 | ||
889 | switch (fixp->fx_r_type) | |
890 | { | |
891 | case BFD_RELOC_AVR_7_PCREL: | |
892 | if (value & 1) | |
893 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
894 | _("odd address operand: %ld"), value); | |
1dab94dd | 895 | |
adde6300 AM |
896 | /* Instruction addresses are always right-shifted by 1. */ |
897 | value >>= 1; | |
898 | --value; /* Correct PC. */ | |
1dab94dd | 899 | |
adde6300 AM |
900 | if (value < -64 || value > 63) |
901 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
902 | _("operand out of range: %ld"), value); | |
903 | value = (value << 3) & 0x3f8; | |
904 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
905 | break; | |
906 | ||
907 | case BFD_RELOC_AVR_13_PCREL: | |
908 | if (value & 1) | |
909 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
910 | _("odd address operand: %ld"), value); | |
1dab94dd | 911 | |
adde6300 AM |
912 | /* Instruction addresses are always right-shifted by 1. */ |
913 | value >>= 1; | |
914 | --value; /* Correct PC. */ | |
adde6300 AM |
915 | |
916 | if (value < -2048 || value > 2047) | |
917 | { | |
65aa24b6 | 918 | /* No wrap for devices with >8K of program memory. */ |
00d2865b | 919 | if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap) |
adde6300 AM |
920 | as_bad_where (fixp->fx_file, fixp->fx_line, |
921 | _("operand out of range: %ld"), value); | |
922 | } | |
923 | ||
924 | value &= 0xfff; | |
925 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
926 | break; | |
927 | ||
928 | case BFD_RELOC_32: | |
929 | bfd_putl16 ((bfd_vma) value, where); | |
930 | break; | |
931 | ||
932 | case BFD_RELOC_16: | |
933 | bfd_putl16 ((bfd_vma) value, where); | |
934 | break; | |
935 | ||
936 | case BFD_RELOC_AVR_16_PM: | |
c6a7ab1f | 937 | bfd_putl16 ((bfd_vma) (value >> 1), where); |
adde6300 AM |
938 | break; |
939 | ||
940 | case BFD_RELOC_AVR_LO8_LDI: | |
941 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
942 | break; | |
943 | ||
944 | case -BFD_RELOC_AVR_LO8_LDI: | |
945 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
946 | break; | |
947 | ||
948 | case BFD_RELOC_AVR_HI8_LDI: | |
949 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where); | |
950 | break; | |
951 | ||
952 | case -BFD_RELOC_AVR_HI8_LDI: | |
953 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where); | |
954 | break; | |
955 | ||
956 | case BFD_RELOC_AVR_HH8_LDI: | |
957 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
958 | break; | |
959 | ||
960 | case BFD_RELOC_AVR_LO8_LDI_NEG: | |
961 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where); | |
962 | break; | |
963 | ||
964 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
965 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
966 | break; | |
967 | ||
968 | case BFD_RELOC_AVR_HI8_LDI_NEG: | |
969 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where); | |
970 | break; | |
971 | ||
972 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
973 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where); | |
974 | break; | |
975 | ||
976 | case BFD_RELOC_AVR_HH8_LDI_NEG: | |
977 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
978 | break; | |
979 | ||
980 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
981 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where); | |
982 | break; | |
983 | ||
984 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
985 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where); | |
986 | break; | |
987 | ||
988 | case BFD_RELOC_AVR_HH8_LDI_PM: | |
989 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where); | |
990 | break; | |
991 | ||
992 | case BFD_RELOC_AVR_LO8_LDI_PM_NEG: | |
993 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where); | |
994 | break; | |
995 | ||
996 | case BFD_RELOC_AVR_HI8_LDI_PM_NEG: | |
997 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where); | |
998 | break; | |
999 | ||
1000 | case BFD_RELOC_AVR_HH8_LDI_PM_NEG: | |
1001 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where); | |
1002 | break; | |
1003 | ||
1004 | case BFD_RELOC_AVR_CALL: | |
1005 | { | |
1006 | unsigned long x; | |
1dab94dd | 1007 | |
adde6300 AM |
1008 | x = bfd_getl16 (where); |
1009 | if (value & 1) | |
1010 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1011 | _("odd address operand: %ld"), value); | |
1012 | value >>= 1; | |
1013 | x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16; | |
1014 | bfd_putl16 ((bfd_vma) x, where); | |
c6a7ab1f | 1015 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
adde6300 AM |
1016 | } |
1017 | break; | |
1018 | ||
1019 | default: | |
c6a7ab1f NC |
1020 | as_fatal (_("line %d: unknown relocation type: 0x%x"), |
1021 | fixp->fx_line, fixp->fx_r_type); | |
adde6300 AM |
1022 | break; |
1023 | } | |
1024 | } | |
1025 | else | |
1026 | { | |
1027 | switch (fixp->fx_r_type) | |
1028 | { | |
1029 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
1030 | case -BFD_RELOC_AVR_HI8_LDI: | |
1031 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
1032 | case -BFD_RELOC_AVR_LO8_LDI: | |
1033 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1034 | _("only constant expression allowed")); | |
1035 | fixp->fx_done = 1; | |
1036 | break; | |
1037 | default: | |
1038 | break; | |
1039 | } | |
1040 | fixp->fx_addnumber = value; | |
1041 | } | |
1042 | return 0; | |
1043 | } | |
1044 | ||
adde6300 AM |
1045 | /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS |
1046 | will pass the resulting reloc to `bfd_install_relocation'. This | |
1047 | currently works poorly, as `bfd_install_relocation' often does the | |
1048 | wrong thing, and instances of `tc_gen_reloc' have been written to | |
1049 | work around the problems, which in turns makes it difficult to fix | |
c6a7ab1f | 1050 | `bfd_install_relocation'. */ |
adde6300 AM |
1051 | |
1052 | /* If while processing a fixup, a reloc really needs to be created | |
1053 | then it is done here. */ | |
1054 | ||
1055 | arelent * | |
1056 | tc_gen_reloc (seg, fixp) | |
df136245 | 1057 | asection *seg ATTRIBUTE_UNUSED; |
adde6300 AM |
1058 | fixS *fixp; |
1059 | { | |
1060 | arelent *reloc; | |
1061 | ||
1062 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
1063 | ||
1064 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1065 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1066 | ||
1067 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1068 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1069 | if (reloc->howto == (reloc_howto_type *) NULL) | |
1070 | { | |
1071 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
c6a7ab1f NC |
1072 | _("reloc %d not supported by object file format"), |
1073 | (int) fixp->fx_r_type); | |
adde6300 AM |
1074 | return NULL; |
1075 | } | |
1076 | ||
1077 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1078 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1079 | reloc->address = fixp->fx_offset; | |
1080 | ||
1081 | reloc->addend = fixp->fx_offset; | |
1082 | ||
1083 | return reloc; | |
1084 | } | |
1085 | ||
adde6300 AM |
1086 | void |
1087 | md_assemble (str) | |
1088 | char *str; | |
1089 | { | |
c6a7ab1f | 1090 | struct avr_opcodes_s *opcode; |
adde6300 AM |
1091 | char op[11]; |
1092 | ||
c6a7ab1f | 1093 | str = skip_space (extract_word (str, op, sizeof (op))); |
adde6300 AM |
1094 | |
1095 | if (!op[0]) | |
00d2865b | 1096 | as_bad (_("can't find opcode ")); |
adde6300 AM |
1097 | |
1098 | opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op); | |
1099 | ||
1100 | if (opcode == NULL) | |
1101 | { | |
00d2865b | 1102 | as_bad (_("unknown opcode `%s'"), op); |
adde6300 AM |
1103 | return; |
1104 | } | |
1105 | ||
b170af93 | 1106 | /* Special case for opcodes with optional operands (lpm, elpm) - |
1188e082 | 1107 | version with operands exists in avr_opcodes[] in the next entry. */ |
c6a7ab1f | 1108 | |
1188e082 DC |
1109 | if (*str && *opcode->constraints == '?') |
1110 | ++opcode; | |
b170af93 | 1111 | |
00d2865b NC |
1112 | if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa) |
1113 | as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name); | |
adde6300 AM |
1114 | |
1115 | /* We used to set input_line_pointer to the result of get_operands, | |
1116 | but that is wrong. Our caller assumes we don't change it. */ | |
1117 | { | |
1118 | char *t = input_line_pointer; | |
1119 | avr_operands (opcode, &str); | |
b170af93 | 1120 | if (*skip_space (str)) |
00d2865b | 1121 | as_bad (_("garbage at end of line")); |
adde6300 AM |
1122 | input_line_pointer = t; |
1123 | } | |
1124 | } | |
1125 | ||
1126 | /* Parse ordinary expression. */ | |
c6a7ab1f | 1127 | |
adde6300 AM |
1128 | static char * |
1129 | parse_exp (s, op) | |
1130 | char *s; | |
c6a7ab1f | 1131 | expressionS *op; |
adde6300 AM |
1132 | { |
1133 | input_line_pointer = s; | |
1134 | expression (op); | |
1135 | if (op->X_op == O_absent) | |
1136 | as_bad (_("missing operand")); | |
1137 | return input_line_pointer; | |
1138 | } | |
1139 | ||
adde6300 AM |
1140 | /* Parse special expressions (needed for LDI command): |
1141 | xx8 (address) | |
1142 | xx8 (-address) | |
1143 | pm_xx8 (address) | |
1144 | pm_xx8 (-address) | |
c6a7ab1f NC |
1145 | where xx is: hh, hi, lo. */ |
1146 | ||
adde6300 AM |
1147 | static bfd_reloc_code_real_type |
1148 | avr_ldi_expression (exp) | |
1149 | expressionS *exp; | |
1150 | { | |
1151 | char *str = input_line_pointer; | |
1152 | char *tmp; | |
1153 | char op[8]; | |
1154 | int mod; | |
1155 | tmp = str; | |
1156 | ||
1157 | str = extract_word (str, op, sizeof (op)); | |
1dab94dd | 1158 | |
adde6300 AM |
1159 | if (op[0]) |
1160 | { | |
1161 | mod = (int) hash_find (avr_mod_hash, op); | |
1dab94dd | 1162 | |
adde6300 AM |
1163 | if (mod) |
1164 | { | |
1165 | int closes = 0; | |
1dab94dd | 1166 | |
adde6300 AM |
1167 | mod -= 10; |
1168 | str = skip_space (str); | |
1dab94dd | 1169 | |
adde6300 AM |
1170 | if (*str == '(') |
1171 | { | |
1172 | int neg_p = 0; | |
1dab94dd | 1173 | |
adde6300 | 1174 | ++str; |
1dab94dd | 1175 | |
adde6300 AM |
1176 | if (strncmp ("pm(", str, 3) == 0 |
1177 | || strncmp ("-(pm(", str, 5) == 0) | |
1178 | { | |
c6a7ab1f | 1179 | if (HAVE_PM_P (mod)) |
adde6300 AM |
1180 | { |
1181 | ++mod; | |
1182 | ++closes; | |
1183 | } | |
1184 | else | |
00d2865b | 1185 | as_bad (_("illegal expression")); |
1dab94dd | 1186 | |
adde6300 AM |
1187 | if (*str == '-') |
1188 | { | |
1189 | neg_p = 1; | |
1190 | ++closes; | |
1191 | str += 5; | |
1192 | } | |
1193 | else | |
1194 | str += 3; | |
1195 | } | |
1dab94dd | 1196 | |
adde6300 AM |
1197 | if (*str == '-' && *(str + 1) == '(') |
1198 | { | |
1199 | neg_p ^= 1; | |
1200 | ++closes; | |
1201 | str += 2; | |
1202 | } | |
1dab94dd | 1203 | |
adde6300 AM |
1204 | input_line_pointer = str; |
1205 | expression (exp); | |
1dab94dd | 1206 | |
adde6300 AM |
1207 | do |
1208 | { | |
1209 | if (*input_line_pointer != ')') | |
1210 | { | |
00d2865b | 1211 | as_bad (_("`)' required")); |
adde6300 AM |
1212 | break; |
1213 | } | |
1214 | input_line_pointer++; | |
1215 | } | |
1216 | while (closes--); | |
1dab94dd | 1217 | |
adde6300 AM |
1218 | return neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod); |
1219 | } | |
1220 | } | |
1221 | } | |
1dab94dd | 1222 | |
adde6300 AM |
1223 | input_line_pointer = tmp; |
1224 | expression (exp); | |
00d2865b | 1225 | |
c6a7ab1f | 1226 | /* Warn about expressions that fail to use lo8 (). */ |
00d2865b NC |
1227 | if (exp->X_op == O_constant) |
1228 | { | |
1229 | int x = exp->X_add_number; | |
1230 | if (x < -255 || x > 255) | |
1231 | as_warn (_("constant out of 8-bit range: %d"), x); | |
1232 | } | |
1233 | else | |
1234 | as_warn (_("expression possibly out of 8-bit range")); | |
1235 | ||
adde6300 AM |
1236 | return BFD_RELOC_AVR_LO8_LDI; |
1237 | } | |
1238 | ||
1239 | /* Flag to pass `pm' mode between `avr_parse_cons_expression' and | |
c6a7ab1f | 1240 | `avr_cons_fix_new'. */ |
adde6300 AM |
1241 | static int exp_mod_pm = 0; |
1242 | ||
1243 | /* Parse special CONS expression: pm (expression) | |
1244 | which is used for addressing to a program memory. | |
c6a7ab1f NC |
1245 | Relocation: BFD_RELOC_AVR_16_PM. */ |
1246 | ||
adde6300 AM |
1247 | void |
1248 | avr_parse_cons_expression (exp, nbytes) | |
1249 | expressionS *exp; | |
1250 | int nbytes; | |
1251 | { | |
c6a7ab1f | 1252 | char *tmp; |
adde6300 AM |
1253 | |
1254 | exp_mod_pm = 0; | |
1255 | ||
1256 | tmp = input_line_pointer = skip_space (input_line_pointer); | |
1257 | ||
1258 | if (nbytes == 2) | |
1259 | { | |
c6a7ab1f | 1260 | char *pm_name = "pm"; |
adde6300 | 1261 | int len = strlen (pm_name); |
1dab94dd | 1262 | |
adde6300 AM |
1263 | if (strncasecmp (input_line_pointer, pm_name, len) == 0) |
1264 | { | |
1265 | input_line_pointer = skip_space (input_line_pointer + len); | |
1dab94dd | 1266 | |
adde6300 AM |
1267 | if (*input_line_pointer == '(') |
1268 | { | |
1269 | input_line_pointer = skip_space (input_line_pointer + 1); | |
1270 | exp_mod_pm = 1; | |
1271 | expression (exp); | |
1dab94dd | 1272 | |
adde6300 AM |
1273 | if (*input_line_pointer == ')') |
1274 | ++input_line_pointer; | |
1275 | else | |
1276 | { | |
00d2865b | 1277 | as_bad (_("`)' required")); |
adde6300 AM |
1278 | exp_mod_pm = 0; |
1279 | } | |
1dab94dd | 1280 | |
adde6300 AM |
1281 | return; |
1282 | } | |
1dab94dd | 1283 | |
adde6300 AM |
1284 | input_line_pointer = tmp; |
1285 | } | |
1286 | } | |
1dab94dd | 1287 | |
adde6300 AM |
1288 | expression (exp); |
1289 | } | |
1290 | ||
1291 | void | |
c6a7ab1f | 1292 | avr_cons_fix_new (frag, where, nbytes, exp) |
adde6300 AM |
1293 | fragS *frag; |
1294 | int where; | |
1295 | int nbytes; | |
1296 | expressionS *exp; | |
1297 | { | |
1298 | if (exp_mod_pm == 0) | |
1299 | { | |
1300 | if (nbytes == 2) | |
1301 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_16); | |
1302 | else if (nbytes == 4) | |
1303 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_32); | |
1304 | else | |
00d2865b | 1305 | as_bad (_("illegal %srelocation size: %d"), "", nbytes); |
adde6300 AM |
1306 | } |
1307 | else | |
1308 | { | |
1309 | if (nbytes == 2) | |
1310 | fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_AVR_16_PM); | |
1311 | else | |
00d2865b | 1312 | as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes); |
adde6300 AM |
1313 | exp_mod_pm = 0; |
1314 | } | |
1315 | } |