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adde6300 AM |
1 | /* tc-avr.c -- Assembler code for the ATMEL AVR |
2 | ||
8ad7c533 | 3 | Copyright 1999, 2000, 2001, 2002, 2004, 2005, 2006 |
2132e3a3 | 4 | Free Software Foundation, Inc. |
adde6300 AM |
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 | |
4b4da160 NC |
21 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
adde6300 | 23 | |
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 | { | |
dc191a8f NC |
30 | char * name; |
31 | char * constraints; | |
32 | int insn_size; /* In words. */ | |
33 | int isa; | |
34 | unsigned int bin_opcode; | |
1188e082 DC |
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 | { | |
28c9d252 NC |
64 | {"avr1", AVR_ISA_TINY1, bfd_mach_avr1}, |
65 | {"avr2", AVR_ISA_TINY2, bfd_mach_avr2}, | |
66 | {"avr3", AVR_ISA_M103, bfd_mach_avr3}, | |
67 | {"avr4", AVR_ISA_M8, bfd_mach_avr4}, | |
68 | {"avr5", AVR_ISA_ALL, bfd_mach_avr5}, | |
69 | {"avr6", AVR_ISA_ALL, bfd_mach_avr6}, | |
70 | {"at90s1200", AVR_ISA_1200, bfd_mach_avr1}, | |
71 | {"attiny10", AVR_ISA_TINY1, bfd_mach_avr1}, /* XXX -> tn11 */ | |
72 | {"attiny11", AVR_ISA_TINY1, bfd_mach_avr1}, | |
73 | {"attiny12", AVR_ISA_TINY1, bfd_mach_avr1}, | |
74 | {"attiny15", AVR_ISA_TINY1, bfd_mach_avr1}, | |
75 | {"attiny28", AVR_ISA_TINY1, bfd_mach_avr1}, | |
76 | {"at90s2313", AVR_ISA_2xxx, bfd_mach_avr2}, | |
77 | {"at90s2323", AVR_ISA_2xxx, bfd_mach_avr2}, | |
78 | {"at90s2333", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 4433 */ | |
79 | {"at90s2343", AVR_ISA_2xxx, bfd_mach_avr2}, | |
80 | {"attiny22", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 2343 */ | |
81 | {"attiny26", AVR_ISA_2xxx, bfd_mach_avr2}, | |
82 | {"at90s4433", AVR_ISA_2xxx, bfd_mach_avr2}, | |
83 | {"at90s4414", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8515 */ | |
84 | {"at90s4434", AVR_ISA_2xxx, bfd_mach_avr2}, /* XXX -> 8535 */ | |
85 | {"at90s8515", AVR_ISA_2xxx, bfd_mach_avr2}, | |
86 | {"at90s8535", AVR_ISA_2xxx, bfd_mach_avr2}, | |
87 | {"at90c8534", AVR_ISA_2xxx, bfd_mach_avr2}, | |
88 | {"at86rf401", AVR_ISA_2xxx, bfd_mach_avr2}, | |
89 | {"attiny13", AVR_ISA_TINY2, bfd_mach_avr2}, | |
90 | {"attiny2313", AVR_ISA_TINY2, bfd_mach_avr2}, | |
91 | {"attiny261", AVR_ISA_TINY2, bfd_mach_avr2}, | |
92 | {"attiny461", AVR_ISA_TINY2, bfd_mach_avr2}, | |
93 | {"attiny861", AVR_ISA_TINY2, bfd_mach_avr2}, | |
94 | {"attiny24", AVR_ISA_TINY2, bfd_mach_avr2}, | |
95 | {"attiny44", AVR_ISA_TINY2, bfd_mach_avr2}, | |
96 | {"attiny84", AVR_ISA_TINY2, bfd_mach_avr2}, | |
97 | {"attiny25", AVR_ISA_TINY2, bfd_mach_avr2}, | |
98 | {"attiny45", AVR_ISA_TINY2, bfd_mach_avr2}, | |
99 | {"attiny85", AVR_ISA_TINY2, bfd_mach_avr2}, | |
100 | {"atmega603", AVR_ISA_M603, bfd_mach_avr3}, /* XXX -> m103 */ | |
101 | {"atmega103", AVR_ISA_M103, bfd_mach_avr3}, | |
102 | {"at43usb320", AVR_ISA_M103, bfd_mach_avr3}, | |
103 | {"at43usb355", AVR_ISA_M603, bfd_mach_avr3}, | |
104 | {"at76c711", AVR_ISA_M603, bfd_mach_avr3}, | |
105 | {"atmega48", AVR_ISA_PWMx, bfd_mach_avr4}, | |
106 | {"atmega8", AVR_ISA_M8, bfd_mach_avr4}, | |
107 | {"atmega83", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8535 */ | |
108 | {"atmega85", AVR_ISA_M8, bfd_mach_avr4}, /* XXX -> m8 */ | |
109 | {"atmega88", AVR_ISA_PWMx, bfd_mach_avr4}, | |
110 | {"atmega8515", AVR_ISA_M8, bfd_mach_avr4}, | |
111 | {"atmega8535", AVR_ISA_M8, bfd_mach_avr4}, | |
7b60f473 | 112 | {"at90pwm1", AVR_ISA_PWMx, bfd_mach_avr4}, |
28c9d252 NC |
113 | {"at90pwm2", AVR_ISA_PWMx, bfd_mach_avr4}, |
114 | {"at90pwm3", AVR_ISA_PWMx, bfd_mach_avr4}, | |
7b60f473 | 115 | {"at90usb82", AVR_ISA_PWMx, bfd_mach_avr4}, |
28c9d252 NC |
116 | {"atmega16", AVR_ISA_M323, bfd_mach_avr5}, |
117 | {"atmega161", AVR_ISA_M161, bfd_mach_avr5}, | |
118 | {"atmega162", AVR_ISA_M323, bfd_mach_avr5}, | |
119 | {"atmega163", AVR_ISA_M161, bfd_mach_avr5}, | |
026dcbd7 | 120 | {"atmega164p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 | 121 | {"atmega165", AVR_ISA_M323, bfd_mach_avr5}, |
026dcbd7 | 122 | {"atmega165p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 NC |
123 | {"atmega168", AVR_ISA_M323, bfd_mach_avr5}, |
124 | {"atmega169", AVR_ISA_M323, bfd_mach_avr5}, | |
026dcbd7 | 125 | {"atmega169p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 NC |
126 | {"atmega32", AVR_ISA_M323, bfd_mach_avr5}, |
127 | {"atmega323", AVR_ISA_M323, bfd_mach_avr5}, | |
026dcbd7 | 128 | {"atmega324p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 | 129 | {"atmega325", AVR_ISA_M323, bfd_mach_avr5}, |
7b60f473 | 130 | {"atmega325p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 | 131 | {"atmega329", AVR_ISA_M323, bfd_mach_avr5}, |
7b60f473 | 132 | {"atmega329p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 | 133 | {"atmega3250", AVR_ISA_M323, bfd_mach_avr5}, |
7b60f473 | 134 | {"atmega3250p",AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 | 135 | {"atmega3290", AVR_ISA_M323, bfd_mach_avr5}, |
7b60f473 | 136 | {"atmega3290p",AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 NC |
137 | {"atmega406", AVR_ISA_M323, bfd_mach_avr5}, |
138 | {"atmega64", AVR_ISA_M323, bfd_mach_avr5}, | |
139 | {"atmega640", AVR_ISA_M323, bfd_mach_avr5}, | |
140 | {"atmega644", AVR_ISA_M323, bfd_mach_avr5}, | |
026dcbd7 | 141 | {"atmega644p", AVR_ISA_M323, bfd_mach_avr5}, |
28c9d252 NC |
142 | {"atmega128", AVR_ISA_M128, bfd_mach_avr5}, |
143 | {"atmega1280", AVR_ISA_M128, bfd_mach_avr5}, | |
144 | {"atmega1281", AVR_ISA_M128, bfd_mach_avr5}, | |
145 | {"atmega645", AVR_ISA_M323, bfd_mach_avr5}, | |
146 | {"atmega649", AVR_ISA_M323, bfd_mach_avr5}, | |
147 | {"atmega6450", AVR_ISA_M323, bfd_mach_avr5}, | |
148 | {"atmega6490", AVR_ISA_M323, bfd_mach_avr5}, | |
149 | {"at90can32" , AVR_ISA_M323, bfd_mach_avr5}, | |
150 | {"at90can64" , AVR_ISA_M323, bfd_mach_avr5}, | |
151 | {"at90can128", AVR_ISA_M128, bfd_mach_avr5}, | |
7b60f473 | 152 | {"at90usb162", AVR_ISA_M323, bfd_mach_avr5}, |
d727e8c2 NC |
153 | {"at90usb646", AVR_ISA_M323, bfd_mach_avr5}, |
154 | {"at90usb647", AVR_ISA_M323, bfd_mach_avr5}, | |
155 | {"at90usb1286",AVR_ISA_M128, bfd_mach_avr5}, | |
156 | {"at90usb1287",AVR_ISA_M128, bfd_mach_avr5}, | |
28c9d252 NC |
157 | {"at94k", AVR_ISA_94K, bfd_mach_avr5}, |
158 | {"atmega2560", AVR_ISA_ALL, bfd_mach_avr6}, | |
159 | {"atmega2561", AVR_ISA_ALL, bfd_mach_avr6}, | |
adde6300 AM |
160 | {NULL, 0, 0} |
161 | }; | |
162 | ||
adde6300 | 163 | /* Current MCU type. */ |
dc191a8f NC |
164 | static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2}; |
165 | static struct mcu_type_s * avr_mcu = & default_mcu; | |
adde6300 | 166 | |
00d2865b NC |
167 | /* AVR target-specific switches. */ |
168 | struct avr_opt_s | |
169 | { | |
dc191a8f NC |
170 | int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes. */ |
171 | int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns. */ | |
172 | int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around. */ | |
00d2865b NC |
173 | }; |
174 | ||
175 | static struct avr_opt_s avr_opt = { 0, 0, 0 }; | |
176 | ||
adde6300 AM |
177 | const char EXP_CHARS[] = "eE"; |
178 | const char FLT_CHARS[] = "dD"; | |
dc191a8f NC |
179 | |
180 | static void avr_set_arch (int); | |
adde6300 AM |
181 | |
182 | /* The target specific pseudo-ops which we support. */ | |
183 | const pseudo_typeS md_pseudo_table[] = | |
184 | { | |
185 | {"arch", avr_set_arch, 0}, | |
186 | { NULL, NULL, 0} | |
187 | }; | |
188 | ||
189 | #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00)) | |
adde6300 | 190 | |
dc191a8f NC |
191 | #define EXP_MOD_NAME(i) exp_mod[i].name |
192 | #define EXP_MOD_RELOC(i) exp_mod[i].reloc | |
193 | #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc | |
194 | #define HAVE_PM_P(i) exp_mod[i].have_pm | |
adde6300 AM |
195 | |
196 | struct exp_mod_s | |
197 | { | |
dc191a8f NC |
198 | char * name; |
199 | bfd_reloc_code_real_type reloc; | |
200 | bfd_reloc_code_real_type neg_reloc; | |
201 | int have_pm; | |
adde6300 AM |
202 | }; |
203 | ||
c6a7ab1f NC |
204 | static struct exp_mod_s exp_mod[] = |
205 | { | |
adde6300 AM |
206 | {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1}, |
207 | {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0}, | |
208 | {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1}, | |
209 | {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0}, | |
210 | {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1}, | |
211 | {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0}, | |
df406460 NC |
212 | {"hlo8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 0}, |
213 | {"hhi8", BFD_RELOC_AVR_MS8_LDI, BFD_RELOC_AVR_MS8_LDI_NEG, 0}, | |
adde6300 AM |
214 | }; |
215 | ||
8ad7c533 NC |
216 | /* A union used to store indicies into the exp_mod[] array |
217 | in a hash table which expects void * data types. */ | |
218 | typedef union | |
219 | { | |
220 | void * ptr; | |
221 | int index; | |
222 | } mod_index; | |
223 | ||
adde6300 AM |
224 | /* Opcode hash table. */ |
225 | static struct hash_control *avr_hash; | |
226 | ||
227 | /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */ | |
228 | static struct hash_control *avr_mod_hash; | |
229 | ||
00d2865b | 230 | #define OPTION_MMCU 'm' |
dc191a8f NC |
231 | enum options |
232 | { | |
233 | OPTION_ALL_OPCODES = OPTION_MD_BASE + 1, | |
234 | OPTION_NO_SKIP_BUG, | |
235 | OPTION_NO_WRAP | |
236 | }; | |
adde6300 | 237 | |
c6a7ab1f NC |
238 | struct option md_longopts[] = |
239 | { | |
00d2865b NC |
240 | { "mmcu", required_argument, NULL, OPTION_MMCU }, |
241 | { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES }, | |
242 | { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG }, | |
243 | { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP }, | |
244 | { NULL, no_argument, NULL, 0 } | |
adde6300 | 245 | }; |
adde6300 | 246 | |
c6a7ab1f | 247 | size_t md_longopts_size = sizeof (md_longopts); |
00d2865b NC |
248 | |
249 | /* Display nicely formatted list of known MCU names. */ | |
c6a7ab1f | 250 | |
00d2865b | 251 | static void |
dc191a8f | 252 | show_mcu_list (FILE *stream) |
00d2865b NC |
253 | { |
254 | int i, x; | |
255 | ||
256 | fprintf (stream, _("Known MCU names:")); | |
257 | x = 1000; | |
1dab94dd | 258 | |
00d2865b NC |
259 | for (i = 0; mcu_types[i].name; i++) |
260 | { | |
261 | int len = strlen (mcu_types[i].name); | |
1dab94dd | 262 | |
00d2865b | 263 | x += len + 1; |
1dab94dd | 264 | |
00d2865b | 265 | if (x < 75) |
c6a7ab1f | 266 | fprintf (stream, " %s", mcu_types[i].name); |
00d2865b NC |
267 | else |
268 | { | |
269 | fprintf (stream, "\n %s", mcu_types[i].name); | |
270 | x = len + 2; | |
271 | } | |
272 | } | |
1dab94dd | 273 | |
c6a7ab1f | 274 | fprintf (stream, "\n"); |
00d2865b NC |
275 | } |
276 | ||
adde6300 | 277 | static inline char * |
dc191a8f | 278 | skip_space (char *s) |
adde6300 AM |
279 | { |
280 | while (*s == ' ' || *s == '\t') | |
281 | ++s; | |
282 | return s; | |
283 | } | |
284 | ||
285 | /* Extract one word from FROM and copy it to TO. */ | |
c6a7ab1f | 286 | |
adde6300 AM |
287 | static char * |
288 | extract_word (char *from, char *to, int limit) | |
289 | { | |
290 | char *op_start; | |
291 | char *op_end; | |
292 | int size = 0; | |
293 | ||
294 | /* Drop leading whitespace. */ | |
295 | from = skip_space (from); | |
296 | *to = 0; | |
c6a7ab1f | 297 | |
adde6300 | 298 | /* Find the op code end. */ |
c6a7ab1f | 299 | for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);) |
adde6300 AM |
300 | { |
301 | to[size++] = *op_end++; | |
302 | if (size + 1 >= limit) | |
303 | break; | |
304 | } | |
1dab94dd | 305 | |
adde6300 AM |
306 | to[size] = 0; |
307 | return op_end; | |
308 | } | |
309 | ||
310 | int | |
dc191a8f NC |
311 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, |
312 | asection *seg ATTRIBUTE_UNUSED) | |
adde6300 AM |
313 | { |
314 | abort (); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | void | |
dc191a8f | 319 | md_show_usage (FILE *stream) |
adde6300 | 320 | { |
00d2865b NC |
321 | fprintf (stream, |
322 | _("AVR options:\n" | |
adde6300 AM |
323 | " -mmcu=[avr-name] select microcontroller variant\n" |
324 | " [avr-name] can be:\n" | |
65aa24b6 NC |
325 | " avr1 - AT90S1200, ATtiny1x, ATtiny28\n" |
326 | " avr2 - AT90S2xxx, AT90S4xxx, AT90S8xxx, ATtiny22\n" | |
327 | " avr3 - ATmega103, ATmega603\n" | |
328 | " avr4 - ATmega83, ATmega85\n" | |
329 | " avr5 - ATmega161, ATmega163, ATmega32, AT94K\n" | |
adde6300 | 330 | " or immediate microcontroller name.\n")); |
00d2865b NC |
331 | fprintf (stream, |
332 | _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n" | |
333 | " -mno-skip-bug disable warnings for skipping two-word instructions\n" | |
334 | " (default for avr4, avr5)\n" | |
335 | " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n" | |
336 | " (default for avr3, avr5)\n")); | |
337 | show_mcu_list (stream); | |
adde6300 AM |
338 | } |
339 | ||
340 | static void | |
dc191a8f | 341 | avr_set_arch (int dummy ATTRIBUTE_UNUSED) |
adde6300 | 342 | { |
dc191a8f | 343 | char str[20]; |
1dab94dd | 344 | |
adde6300 | 345 | input_line_pointer = extract_word (input_line_pointer, str, 20); |
00d2865b | 346 | md_parse_option (OPTION_MMCU, str); |
adde6300 AM |
347 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
348 | } | |
349 | ||
350 | int | |
dc191a8f | 351 | md_parse_option (int c, char *arg) |
adde6300 | 352 | { |
00d2865b | 353 | switch (c) |
adde6300 | 354 | { |
00d2865b NC |
355 | case OPTION_MMCU: |
356 | { | |
357 | int i; | |
358 | char *s = alloca (strlen (arg) + 1); | |
adde6300 | 359 | |
00d2865b NC |
360 | { |
361 | char *t = s; | |
362 | char *arg1 = arg; | |
363 | ||
364 | do | |
3882b010 | 365 | *t = TOLOWER (*arg1++); |
00d2865b NC |
366 | while (*t++); |
367 | } | |
368 | ||
369 | for (i = 0; mcu_types[i].name; ++i) | |
370 | if (strcmp (mcu_types[i].name, s) == 0) | |
371 | break; | |
adde6300 | 372 | |
00d2865b NC |
373 | if (!mcu_types[i].name) |
374 | { | |
375 | show_mcu_list (stderr); | |
376 | as_fatal (_("unknown MCU: %s\n"), arg); | |
377 | } | |
65aa24b6 | 378 | |
00d2865b NC |
379 | /* It is OK to redefine mcu type within the same avr[1-5] bfd machine |
380 | type - this for allows passing -mmcu=... via gcc ASM_SPEC as well | |
381 | as .arch ... in the asm output at the same time. */ | |
00d2865b NC |
382 | if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach) |
383 | avr_mcu = &mcu_types[i]; | |
384 | else | |
385 | as_fatal (_("redefinition of mcu type `%s' to `%s'"), | |
386 | avr_mcu->name, mcu_types[i].name); | |
387 | return 1; | |
388 | } | |
389 | case OPTION_ALL_OPCODES: | |
390 | avr_opt.all_opcodes = 1; | |
391 | return 1; | |
392 | case OPTION_NO_SKIP_BUG: | |
393 | avr_opt.no_skip_bug = 1; | |
394 | return 1; | |
395 | case OPTION_NO_WRAP: | |
396 | avr_opt.no_wrap = 1; | |
adde6300 AM |
397 | return 1; |
398 | } | |
1dab94dd | 399 | |
adde6300 AM |
400 | return 0; |
401 | } | |
402 | ||
403 | symbolS * | |
dc191a8f | 404 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
adde6300 | 405 | { |
dc191a8f | 406 | return NULL; |
adde6300 AM |
407 | } |
408 | ||
c6a7ab1f NC |
409 | /* Turn a string in input_line_pointer into a floating point constant |
410 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
411 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
412 | returned, or NULL on OK. */ | |
413 | ||
adde6300 | 414 | char * |
dc191a8f | 415 | md_atof (int type, char *litP, int *sizeP) |
adde6300 AM |
416 | { |
417 | int prec; | |
418 | LITTLENUM_TYPE words[4]; | |
419 | LITTLENUM_TYPE *wordP; | |
420 | char *t; | |
421 | ||
422 | switch (type) | |
423 | { | |
424 | case 'f': | |
425 | prec = 2; | |
426 | break; | |
427 | case 'd': | |
428 | prec = 4; | |
429 | break; | |
430 | default: | |
431 | *sizeP = 0; | |
432 | return _("bad call to md_atof"); | |
433 | } | |
434 | ||
435 | t = atof_ieee (input_line_pointer, type, words); | |
436 | if (t) | |
437 | input_line_pointer = t; | |
438 | ||
439 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1dab94dd | 440 | |
adde6300 AM |
441 | /* This loop outputs the LITTLENUMs in REVERSE order. */ |
442 | for (wordP = words + prec - 1; prec--;) | |
443 | { | |
444 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
445 | litP += sizeof (LITTLENUM_TYPE); | |
446 | } | |
1dab94dd | 447 | |
adde6300 AM |
448 | return NULL; |
449 | } | |
450 | ||
451 | void | |
dc191a8f NC |
452 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
453 | asection *sec ATTRIBUTE_UNUSED, | |
454 | fragS *fragP ATTRIBUTE_UNUSED) | |
adde6300 AM |
455 | { |
456 | abort (); | |
457 | } | |
458 | ||
adde6300 | 459 | void |
dc191a8f | 460 | md_begin (void) |
adde6300 | 461 | { |
df136245 | 462 | unsigned int i; |
adde6300 | 463 | struct avr_opcodes_s *opcode; |
dc191a8f | 464 | |
c6a7ab1f | 465 | avr_hash = hash_new (); |
adde6300 AM |
466 | |
467 | /* Insert unique names into hash table. This hash table then provides a | |
468 | quick index to the first opcode with a particular name in the opcode | |
469 | table. */ | |
adde6300 AM |
470 | for (opcode = avr_opcodes; opcode->name; opcode++) |
471 | hash_insert (avr_hash, opcode->name, (char *) opcode); | |
472 | ||
473 | avr_mod_hash = hash_new (); | |
474 | ||
dc191a8f | 475 | for (i = 0; i < ARRAY_SIZE (exp_mod); ++i) |
8ad7c533 NC |
476 | { |
477 | mod_index m; | |
478 | ||
479 | m.index = i + 10; | |
480 | hash_insert (avr_mod_hash, EXP_MOD_NAME (i), m.ptr); | |
481 | } | |
c6a7ab1f | 482 | |
adde6300 AM |
483 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
484 | } | |
485 | ||
df136245 | 486 | /* Resolve STR as a constant expression and return the result. |
c6a7ab1f | 487 | If result greater than MAX then error. */ |
df136245 DC |
488 | |
489 | static unsigned int | |
dc191a8f | 490 | avr_get_constant (char *str, int max) |
df136245 DC |
491 | { |
492 | expressionS ex; | |
dc191a8f | 493 | |
df136245 DC |
494 | str = skip_space (str); |
495 | input_line_pointer = str; | |
dc191a8f | 496 | expression (& ex); |
df136245 DC |
497 | |
498 | if (ex.X_op != O_constant) | |
499 | as_bad (_("constant value required")); | |
500 | ||
501 | if (ex.X_add_number > max || ex.X_add_number < 0) | |
c6a7ab1f | 502 | as_bad (_("number must be less than %d"), max + 1); |
1dab94dd | 503 | |
df136245 DC |
504 | return ex.X_add_number; |
505 | } | |
506 | ||
dc191a8f | 507 | /* Parse for ldd/std offset. */ |
df136245 | 508 | |
dc191a8f NC |
509 | static void |
510 | avr_offset_expression (expressionS *exp) | |
adde6300 | 511 | { |
dc191a8f NC |
512 | char *str = input_line_pointer; |
513 | char *tmp; | |
514 | char op[8]; | |
adde6300 | 515 | |
dc191a8f NC |
516 | tmp = str; |
517 | str = extract_word (str, op, sizeof (op)); | |
518 | ||
519 | input_line_pointer = tmp; | |
520 | expression (exp); | |
521 | ||
522 | /* Warn about expressions that fail to use lo8 (). */ | |
523 | if (exp->X_op == O_constant) | |
adde6300 | 524 | { |
dc191a8f | 525 | int x = exp->X_add_number; |
28c9d252 | 526 | |
dc191a8f NC |
527 | if (x < -255 || x > 255) |
528 | as_warn (_("constant out of 8-bit range: %d"), x); | |
529 | } | |
530 | } | |
adde6300 | 531 | |
dc191a8f | 532 | /* Parse ordinary expression. */ |
adde6300 | 533 | |
dc191a8f NC |
534 | static char * |
535 | parse_exp (char *s, expressionS *op) | |
536 | { | |
537 | input_line_pointer = s; | |
538 | expression (op); | |
539 | if (op->X_op == O_absent) | |
540 | as_bad (_("missing operand")); | |
541 | return input_line_pointer; | |
542 | } | |
1dab94dd | 543 | |
dc191a8f NC |
544 | /* Parse special expressions (needed for LDI command): |
545 | xx8 (address) | |
546 | xx8 (-address) | |
547 | pm_xx8 (address) | |
548 | pm_xx8 (-address) | |
549 | where xx is: hh, hi, lo. */ | |
adde6300 | 550 | |
dc191a8f NC |
551 | static bfd_reloc_code_real_type |
552 | avr_ldi_expression (expressionS *exp) | |
553 | { | |
554 | char *str = input_line_pointer; | |
555 | char *tmp; | |
556 | char op[8]; | |
557 | int mod; | |
28c9d252 NC |
558 | int linker_stubs_should_be_generated = 0; |
559 | ||
dc191a8f | 560 | tmp = str; |
adde6300 | 561 | |
dc191a8f | 562 | str = extract_word (str, op, sizeof (op)); |
adde6300 | 563 | |
dc191a8f NC |
564 | if (op[0]) |
565 | { | |
8ad7c533 | 566 | mod_index m; |
28c9d252 | 567 | |
8ad7c533 NC |
568 | m.ptr = hash_find (avr_mod_hash, op); |
569 | mod = m.index; | |
1dab94dd | 570 | |
dc191a8f NC |
571 | if (mod) |
572 | { | |
573 | int closes = 0; | |
b170af93 | 574 | |
dc191a8f NC |
575 | mod -= 10; |
576 | str = skip_space (str); | |
00d2865b | 577 | |
dc191a8f NC |
578 | if (*str == '(') |
579 | { | |
28c9d252 | 580 | bfd_reloc_code_real_type reloc_to_return; |
dc191a8f | 581 | int neg_p = 0; |
00d2865b | 582 | |
dc191a8f | 583 | ++str; |
00d2865b | 584 | |
dc191a8f | 585 | if (strncmp ("pm(", str, 3) == 0 |
28c9d252 NC |
586 | || strncmp ("gs(",str,3) == 0 |
587 | || strncmp ("-(gs(",str,5) == 0 | |
dc191a8f NC |
588 | || strncmp ("-(pm(", str, 5) == 0) |
589 | { | |
590 | if (HAVE_PM_P (mod)) | |
591 | { | |
592 | ++mod; | |
593 | ++closes; | |
594 | } | |
595 | else | |
596 | as_bad (_("illegal expression")); | |
b170af93 | 597 | |
28c9d252 NC |
598 | if (str[0] == 'g' || str[2] == 'g') |
599 | linker_stubs_should_be_generated = 1; | |
600 | ||
dc191a8f NC |
601 | if (*str == '-') |
602 | { | |
603 | neg_p = 1; | |
604 | ++closes; | |
605 | str += 5; | |
606 | } | |
607 | else | |
608 | str += 3; | |
609 | } | |
adde6300 | 610 | |
dc191a8f NC |
611 | if (*str == '-' && *(str + 1) == '(') |
612 | { | |
613 | neg_p ^= 1; | |
614 | ++closes; | |
615 | str += 2; | |
616 | } | |
750bce0e | 617 | |
dc191a8f NC |
618 | input_line_pointer = str; |
619 | expression (exp); | |
750bce0e | 620 | |
dc191a8f NC |
621 | do |
622 | { | |
623 | if (*input_line_pointer != ')') | |
624 | { | |
625 | as_bad (_("`)' required")); | |
626 | break; | |
627 | } | |
628 | input_line_pointer++; | |
629 | } | |
630 | while (closes--); | |
631 | ||
28c9d252 NC |
632 | reloc_to_return = |
633 | neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod); | |
634 | if (linker_stubs_should_be_generated) | |
635 | { | |
636 | switch (reloc_to_return) | |
637 | { | |
638 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
639 | reloc_to_return = BFD_RELOC_AVR_LO8_LDI_GS; | |
640 | break; | |
641 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
642 | reloc_to_return = BFD_RELOC_AVR_HI8_LDI_GS; | |
643 | break; | |
644 | ||
645 | default: | |
646 | as_warn (_("expression dangerous with linker stubs")); | |
647 | } | |
648 | } | |
649 | return reloc_to_return; | |
dc191a8f NC |
650 | } |
651 | } | |
652 | } | |
750bce0e NC |
653 | |
654 | input_line_pointer = tmp; | |
655 | expression (exp); | |
656 | ||
657 | /* Warn about expressions that fail to use lo8 (). */ | |
658 | if (exp->X_op == O_constant) | |
659 | { | |
660 | int x = exp->X_add_number; | |
dc191a8f | 661 | |
750bce0e NC |
662 | if (x < -255 || x > 255) |
663 | as_warn (_("constant out of 8-bit range: %d"), x); | |
664 | } | |
dc191a8f NC |
665 | |
666 | return BFD_RELOC_AVR_LDI; | |
750bce0e NC |
667 | } |
668 | ||
df136245 | 669 | /* Parse one instruction operand. |
c6a7ab1f NC |
670 | Return operand bitmask. Also fixups can be generated. */ |
671 | ||
adde6300 | 672 | static unsigned int |
dc191a8f NC |
673 | avr_operand (struct avr_opcodes_s *opcode, |
674 | int where, | |
675 | char *op, | |
676 | char **line) | |
adde6300 | 677 | { |
adde6300 | 678 | expressionS op_expr; |
df136245 DC |
679 | unsigned int op_mask = 0; |
680 | char *str = skip_space (*line); | |
adde6300 | 681 | |
adde6300 AM |
682 | switch (*op) |
683 | { | |
684 | /* Any register operand. */ | |
685 | case 'w': | |
686 | case 'd': | |
687 | case 'r': | |
b170af93 DC |
688 | case 'a': |
689 | case 'v': | |
c6a7ab1f NC |
690 | if (*str == 'r' || *str == 'R') |
691 | { | |
692 | char r_name[20]; | |
1dab94dd | 693 | |
c6a7ab1f | 694 | str = extract_word (str, r_name, sizeof (r_name)); |
65b1d096 | 695 | op_mask = 0xff; |
3882b010 | 696 | if (ISDIGIT (r_name[1])) |
c6a7ab1f NC |
697 | { |
698 | if (r_name[2] == '\0') | |
699 | op_mask = r_name[1] - '0'; | |
700 | else if (r_name[1] != '0' | |
3882b010 | 701 | && ISDIGIT (r_name[2]) |
c6a7ab1f NC |
702 | && r_name[3] == '\0') |
703 | op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; | |
704 | } | |
705 | } | |
706 | else | |
707 | { | |
708 | op_mask = avr_get_constant (str, 31); | |
709 | str = input_line_pointer; | |
710 | } | |
1dab94dd | 711 | |
c6a7ab1f NC |
712 | if (op_mask <= 31) |
713 | { | |
714 | switch (*op) | |
715 | { | |
716 | case 'a': | |
717 | if (op_mask < 16 || op_mask > 23) | |
718 | as_bad (_("register r16-r23 required")); | |
719 | op_mask -= 16; | |
720 | break; | |
1dab94dd | 721 | |
c6a7ab1f NC |
722 | case 'd': |
723 | if (op_mask < 16) | |
724 | as_bad (_("register number above 15 required")); | |
725 | op_mask -= 16; | |
726 | break; | |
1dab94dd | 727 | |
c6a7ab1f NC |
728 | case 'v': |
729 | if (op_mask & 1) | |
730 | as_bad (_("even register number required")); | |
731 | op_mask >>= 1; | |
732 | break; | |
1dab94dd | 733 | |
c6a7ab1f | 734 | case 'w': |
65b1d096 | 735 | if ((op_mask & 1) || op_mask < 24) |
c6a7ab1f | 736 | as_bad (_("register r24, r26, r28 or r30 required")); |
65b1d096 | 737 | op_mask = (op_mask - 24) >> 1; |
c6a7ab1f NC |
738 | break; |
739 | } | |
740 | break; | |
741 | } | |
742 | as_bad (_("register name or number from 0 to 31 required")); | |
adde6300 AM |
743 | break; |
744 | ||
745 | case 'e': | |
746 | { | |
747 | char c; | |
1dab94dd | 748 | |
adde6300 AM |
749 | if (*str == '-') |
750 | { | |
c6a7ab1f | 751 | str = skip_space (str + 1); |
adde6300 AM |
752 | op_mask = 0x1002; |
753 | } | |
3882b010 | 754 | c = TOLOWER (*str); |
adde6300 AM |
755 | if (c == 'x') |
756 | op_mask |= 0x100c; | |
757 | else if (c == 'y') | |
758 | op_mask |= 0x8; | |
759 | else if (c != 'z') | |
00d2865b | 760 | as_bad (_("pointer register (X, Y or Z) required")); |
adde6300 | 761 | |
c6a7ab1f | 762 | str = skip_space (str + 1); |
adde6300 AM |
763 | if (*str == '+') |
764 | { | |
765 | ++str; | |
766 | if (op_mask & 2) | |
00d2865b | 767 | as_bad (_("cannot both predecrement and postincrement")); |
adde6300 AM |
768 | op_mask |= 0x1001; |
769 | } | |
e38c9cc2 | 770 | |
1188e082 | 771 | /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer |
e38c9cc2 | 772 | registers, no predecrement, no postincrement. */ |
00d2865b NC |
773 | if (!avr_opt.all_opcodes && (op_mask & 0x100F) |
774 | && !(avr_mcu->isa & AVR_ISA_SRAM)) | |
775 | as_bad (_("addressing mode not supported")); | |
adde6300 AM |
776 | } |
777 | break; | |
778 | ||
b170af93 | 779 | case 'z': |
c6a7ab1f NC |
780 | if (*str == '-') |
781 | as_bad (_("can't predecrement")); | |
1dab94dd | 782 | |
c6a7ab1f NC |
783 | if (! (*str == 'z' || *str == 'Z')) |
784 | as_bad (_("pointer register Z required")); | |
1dab94dd | 785 | |
c6a7ab1f NC |
786 | str = skip_space (str + 1); |
787 | ||
788 | if (*str == '+') | |
789 | { | |
790 | ++str; | |
791 | op_mask |= 1; | |
792 | } | |
b170af93 DC |
793 | break; |
794 | ||
adde6300 AM |
795 | case 'b': |
796 | { | |
3882b010 | 797 | char c = TOLOWER (*str++); |
1dab94dd | 798 | |
adde6300 AM |
799 | if (c == 'y') |
800 | op_mask |= 0x8; | |
801 | else if (c != 'z') | |
00d2865b | 802 | as_bad (_("pointer register (Y or Z) required")); |
adde6300 AM |
803 | str = skip_space (str); |
804 | if (*str++ == '+') | |
805 | { | |
750bce0e NC |
806 | input_line_pointer = str; |
807 | avr_offset_expression (& op_expr); | |
adde6300 | 808 | str = input_line_pointer; |
750bce0e NC |
809 | fix_new_exp (frag_now, where, 3, |
810 | &op_expr, FALSE, BFD_RELOC_AVR_6); | |
adde6300 AM |
811 | } |
812 | } | |
813 | break; | |
814 | ||
815 | case 'h': | |
c6a7ab1f NC |
816 | str = parse_exp (str, &op_expr); |
817 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 818 | &op_expr, FALSE, BFD_RELOC_AVR_CALL); |
adde6300 AM |
819 | break; |
820 | ||
821 | case 'L': | |
c6a7ab1f NC |
822 | str = parse_exp (str, &op_expr); |
823 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 824 | &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL); |
adde6300 AM |
825 | break; |
826 | ||
827 | case 'l': | |
c6a7ab1f NC |
828 | str = parse_exp (str, &op_expr); |
829 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 830 | &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL); |
adde6300 AM |
831 | break; |
832 | ||
833 | case 'i': | |
c6a7ab1f NC |
834 | str = parse_exp (str, &op_expr); |
835 | fix_new_exp (frag_now, where + 2, opcode->insn_size * 2, | |
b34976b6 | 836 | &op_expr, FALSE, BFD_RELOC_16); |
adde6300 AM |
837 | break; |
838 | ||
839 | case 'M': | |
840 | { | |
841 | bfd_reloc_code_real_type r_type; | |
1dab94dd | 842 | |
c6a7ab1f NC |
843 | input_line_pointer = str; |
844 | r_type = avr_ldi_expression (&op_expr); | |
845 | str = input_line_pointer; | |
adde6300 | 846 | fix_new_exp (frag_now, where, 3, |
b34976b6 | 847 | &op_expr, FALSE, r_type); |
adde6300 AM |
848 | } |
849 | break; | |
850 | ||
851 | case 'n': | |
852 | { | |
853 | unsigned int x; | |
1dab94dd | 854 | |
adde6300 AM |
855 | x = ~avr_get_constant (str, 255); |
856 | str = input_line_pointer; | |
857 | op_mask |= (x & 0xf) | ((x << 4) & 0xf00); | |
858 | } | |
859 | break; | |
860 | ||
861 | case 'K': | |
750bce0e NC |
862 | input_line_pointer = str; |
863 | avr_offset_expression (& op_expr); | |
864 | str = input_line_pointer; | |
865 | fix_new_exp (frag_now, where, 3, | |
866 | & op_expr, FALSE, BFD_RELOC_AVR_6_ADIW); | |
adde6300 AM |
867 | break; |
868 | ||
869 | case 'S': | |
870 | case 's': | |
871 | { | |
872 | unsigned int x; | |
1dab94dd | 873 | |
adde6300 AM |
874 | x = avr_get_constant (str, 7); |
875 | str = input_line_pointer; | |
876 | if (*op == 'S') | |
877 | x <<= 4; | |
878 | op_mask |= x; | |
879 | } | |
880 | break; | |
881 | ||
882 | case 'P': | |
883 | { | |
884 | unsigned int x; | |
1dab94dd | 885 | |
adde6300 AM |
886 | x = avr_get_constant (str, 63); |
887 | str = input_line_pointer; | |
888 | op_mask |= (x & 0xf) | ((x & 0x30) << 5); | |
889 | } | |
890 | break; | |
891 | ||
892 | case 'p': | |
893 | { | |
894 | unsigned int x; | |
1dab94dd | 895 | |
adde6300 AM |
896 | x = avr_get_constant (str, 31); |
897 | str = input_line_pointer; | |
898 | op_mask |= x << 3; | |
899 | } | |
900 | break; | |
1dab94dd | 901 | |
1188e082 DC |
902 | case '?': |
903 | break; | |
1dab94dd | 904 | |
adde6300 | 905 | default: |
00d2865b | 906 | as_bad (_("unknown constraint `%c'"), *op); |
adde6300 | 907 | } |
1dab94dd | 908 | |
adde6300 AM |
909 | *line = str; |
910 | return op_mask; | |
911 | } | |
912 | ||
dc191a8f NC |
913 | /* Parse instruction operands. |
914 | Return binary opcode. */ | |
915 | ||
916 | static unsigned int | |
917 | avr_operands (struct avr_opcodes_s *opcode, char **line) | |
918 | { | |
919 | char *op = opcode->constraints; | |
920 | unsigned int bin = opcode->bin_opcode; | |
921 | char *frag = frag_more (opcode->insn_size * 2); | |
922 | char *str = *line; | |
923 | int where = frag - frag_now->fr_literal; | |
924 | static unsigned int prev = 0; /* Previous opcode. */ | |
925 | ||
926 | /* Opcode have operands. */ | |
927 | if (*op) | |
928 | { | |
929 | unsigned int reg1 = 0; | |
930 | unsigned int reg2 = 0; | |
931 | int reg1_present = 0; | |
932 | int reg2_present = 0; | |
933 | ||
934 | /* Parse first operand. */ | |
935 | if (REGISTER_P (*op)) | |
936 | reg1_present = 1; | |
937 | reg1 = avr_operand (opcode, where, op, &str); | |
938 | ++op; | |
939 | ||
940 | /* Parse second operand. */ | |
941 | if (*op) | |
942 | { | |
943 | if (*op == ',') | |
944 | ++op; | |
945 | ||
946 | if (*op == '=') | |
947 | { | |
948 | reg2 = reg1; | |
949 | reg2_present = 1; | |
950 | } | |
951 | else | |
952 | { | |
953 | if (REGISTER_P (*op)) | |
954 | reg2_present = 1; | |
955 | ||
956 | str = skip_space (str); | |
957 | if (*str++ != ',') | |
958 | as_bad (_("`,' required")); | |
959 | str = skip_space (str); | |
960 | ||
961 | reg2 = avr_operand (opcode, where, op, &str); | |
962 | } | |
963 | ||
964 | if (reg1_present && reg2_present) | |
965 | reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200); | |
966 | else if (reg2_present) | |
967 | reg2 <<= 4; | |
968 | } | |
969 | if (reg1_present) | |
970 | reg1 <<= 4; | |
971 | bin |= reg1 | reg2; | |
972 | } | |
973 | ||
974 | /* Detect undefined combinations (like ld r31,Z+). */ | |
975 | if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin)) | |
976 | as_warn (_("undefined combination of operands")); | |
977 | ||
978 | if (opcode->insn_size == 2) | |
979 | { | |
980 | /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs | |
981 | (AVR core bug, fixed in the newer devices). */ | |
982 | if (!(avr_opt.no_skip_bug || | |
983 | (avr_mcu->isa & (AVR_ISA_MUL | AVR_ISA_MOVW))) | |
984 | && AVR_SKIP_P (prev)) | |
985 | as_warn (_("skipping two-word instruction")); | |
986 | ||
987 | bfd_putl32 ((bfd_vma) bin, frag); | |
988 | } | |
989 | else | |
990 | bfd_putl16 ((bfd_vma) bin, frag); | |
991 | ||
992 | prev = bin; | |
993 | *line = str; | |
994 | return bin; | |
995 | } | |
996 | ||
adde6300 AM |
997 | /* GAS will call this function for each section at the end of the assembly, |
998 | to permit the CPU backend to adjust the alignment of a section. */ | |
c6a7ab1f | 999 | |
adde6300 | 1000 | valueT |
dc191a8f | 1001 | md_section_align (asection *seg, valueT addr) |
adde6300 AM |
1002 | { |
1003 | int align = bfd_get_section_alignment (stdoutput, seg); | |
1004 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
1005 | } | |
1006 | ||
1007 | /* If you define this macro, it should return the offset between the | |
1008 | address of a PC relative fixup and the position from which the PC | |
1009 | relative adjustment should be made. On many processors, the base | |
1010 | of a PC relative instruction is the next instruction, so this | |
1011 | macro would return the length of an instruction. */ | |
c6a7ab1f | 1012 | |
adde6300 | 1013 | long |
dc191a8f | 1014 | md_pcrel_from_section (fixS *fixp, segT sec) |
adde6300 | 1015 | { |
c6a7ab1f | 1016 | if (fixp->fx_addsy != (symbolS *) NULL |
adde6300 AM |
1017 | && (!S_IS_DEFINED (fixp->fx_addsy) |
1018 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
1019 | return 0; | |
1dab94dd | 1020 | |
adde6300 AM |
1021 | return fixp->fx_frag->fr_address + fixp->fx_where; |
1022 | } | |
1023 | ||
1024 | /* GAS will call this for each fixup. It should store the correct | |
c6a7ab1f NC |
1025 | value in the object file. */ |
1026 | ||
94f592af | 1027 | void |
dc191a8f | 1028 | md_apply_fix (fixS *fixP, valueT * valP, segT seg) |
adde6300 AM |
1029 | { |
1030 | unsigned char *where; | |
1031 | unsigned long insn; | |
a161fe53 | 1032 | long value = *valP; |
adde6300 | 1033 | |
94f592af NC |
1034 | if (fixP->fx_addsy == (symbolS *) NULL) |
1035 | fixP->fx_done = 1; | |
1036 | ||
87733541 AM |
1037 | else if (fixP->fx_pcrel) |
1038 | { | |
1039 | segT s = S_GET_SEGMENT (fixP->fx_addsy); | |
1040 | ||
1041 | if (s == seg || s == absolute_section) | |
1042 | { | |
1043 | value += S_GET_VALUE (fixP->fx_addsy); | |
1044 | fixP->fx_done = 1; | |
1045 | } | |
1046 | } | |
1047 | ||
a161fe53 AM |
1048 | /* We don't actually support subtracting a symbol. */ |
1049 | if (fixP->fx_subsy != (symbolS *) NULL) | |
1050 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
1dab94dd | 1051 | |
94f592af | 1052 | switch (fixP->fx_r_type) |
adde6300 AM |
1053 | { |
1054 | default: | |
94f592af | 1055 | fixP->fx_no_overflow = 1; |
adde6300 AM |
1056 | break; |
1057 | case BFD_RELOC_AVR_7_PCREL: | |
1058 | case BFD_RELOC_AVR_13_PCREL: | |
1059 | case BFD_RELOC_32: | |
1060 | case BFD_RELOC_16: | |
1061 | case BFD_RELOC_AVR_CALL: | |
1062 | break; | |
1063 | } | |
1064 | ||
94f592af | 1065 | if (fixP->fx_done) |
adde6300 AM |
1066 | { |
1067 | /* Fetch the instruction, insert the fully resolved operand | |
1068 | value, and stuff the instruction back again. */ | |
2132e3a3 | 1069 | where = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
adde6300 AM |
1070 | insn = bfd_getl16 (where); |
1071 | ||
94f592af | 1072 | switch (fixP->fx_r_type) |
adde6300 AM |
1073 | { |
1074 | case BFD_RELOC_AVR_7_PCREL: | |
1075 | if (value & 1) | |
94f592af | 1076 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1077 | _("odd address operand: %ld"), value); |
1dab94dd | 1078 | |
adde6300 AM |
1079 | /* Instruction addresses are always right-shifted by 1. */ |
1080 | value >>= 1; | |
1081 | --value; /* Correct PC. */ | |
1dab94dd | 1082 | |
adde6300 | 1083 | if (value < -64 || value > 63) |
94f592af | 1084 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1085 | _("operand out of range: %ld"), value); |
1086 | value = (value << 3) & 0x3f8; | |
1087 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1088 | break; | |
1089 | ||
1090 | case BFD_RELOC_AVR_13_PCREL: | |
1091 | if (value & 1) | |
94f592af | 1092 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1093 | _("odd address operand: %ld"), value); |
1dab94dd | 1094 | |
adde6300 AM |
1095 | /* Instruction addresses are always right-shifted by 1. */ |
1096 | value >>= 1; | |
1097 | --value; /* Correct PC. */ | |
adde6300 AM |
1098 | |
1099 | if (value < -2048 || value > 2047) | |
1100 | { | |
65aa24b6 | 1101 | /* No wrap for devices with >8K of program memory. */ |
00d2865b | 1102 | if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap) |
94f592af | 1103 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1104 | _("operand out of range: %ld"), value); |
1105 | } | |
1106 | ||
1107 | value &= 0xfff; | |
1108 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1109 | break; | |
1110 | ||
1111 | case BFD_RELOC_32: | |
1112 | bfd_putl16 ((bfd_vma) value, where); | |
1113 | break; | |
1114 | ||
1115 | case BFD_RELOC_16: | |
1116 | bfd_putl16 ((bfd_vma) value, where); | |
1117 | break; | |
1118 | ||
1119 | case BFD_RELOC_AVR_16_PM: | |
c6a7ab1f | 1120 | bfd_putl16 ((bfd_vma) (value >> 1), where); |
adde6300 AM |
1121 | break; |
1122 | ||
750bce0e NC |
1123 | case BFD_RELOC_AVR_LDI: |
1124 | if (value > 255) | |
1125 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1126 | _("operand out of range: %ld"), value); | |
1127 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
1128 | break; | |
1129 | ||
1130 | case BFD_RELOC_AVR_6: | |
1131 | if ((value > 63) || (value < 0)) | |
1132 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1133 | _("operand out of range: %ld"), value); | |
1134 | bfd_putl16 ((bfd_vma) insn | ((value & 7) | ((value & (3 << 3)) << 7) | ((value & (1 << 5)) << 8)), where); | |
1135 | break; | |
1136 | ||
1137 | case BFD_RELOC_AVR_6_ADIW: | |
1138 | if ((value > 63) || (value < 0)) | |
1139 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1140 | _("operand out of range: %ld"), value); | |
1141 | bfd_putl16 ((bfd_vma) insn | (value & 0xf) | ((value & 0x30) << 2), where); | |
1142 | break; | |
1143 | ||
adde6300 AM |
1144 | case BFD_RELOC_AVR_LO8_LDI: |
1145 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
1146 | break; | |
1147 | ||
adde6300 AM |
1148 | case BFD_RELOC_AVR_HI8_LDI: |
1149 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where); | |
1150 | break; | |
1151 | ||
df406460 | 1152 | case BFD_RELOC_AVR_MS8_LDI: |
adde6300 AM |
1153 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where); |
1154 | break; | |
1155 | ||
1156 | case BFD_RELOC_AVR_HH8_LDI: | |
1157 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
1158 | break; | |
1159 | ||
1160 | case BFD_RELOC_AVR_LO8_LDI_NEG: | |
1161 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where); | |
1162 | break; | |
1163 | ||
adde6300 AM |
1164 | case BFD_RELOC_AVR_HI8_LDI_NEG: |
1165 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where); | |
1166 | break; | |
1167 | ||
df406460 | 1168 | case BFD_RELOC_AVR_MS8_LDI_NEG: |
adde6300 AM |
1169 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where); |
1170 | break; | |
1171 | ||
1172 | case BFD_RELOC_AVR_HH8_LDI_NEG: | |
1173 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
1174 | break; | |
1175 | ||
1176 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
1177 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where); | |
1178 | break; | |
1179 | ||
1180 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
1181 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where); | |
1182 | break; | |
1183 | ||
1184 | case BFD_RELOC_AVR_HH8_LDI_PM: | |
1185 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where); | |
1186 | break; | |
1187 | ||
1188 | case BFD_RELOC_AVR_LO8_LDI_PM_NEG: | |
1189 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where); | |
1190 | break; | |
1191 | ||
1192 | case BFD_RELOC_AVR_HI8_LDI_PM_NEG: | |
1193 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where); | |
1194 | break; | |
1195 | ||
1196 | case BFD_RELOC_AVR_HH8_LDI_PM_NEG: | |
1197 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where); | |
1198 | break; | |
1199 | ||
1200 | case BFD_RELOC_AVR_CALL: | |
1201 | { | |
1202 | unsigned long x; | |
1dab94dd | 1203 | |
adde6300 AM |
1204 | x = bfd_getl16 (where); |
1205 | if (value & 1) | |
94f592af | 1206 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1207 | _("odd address operand: %ld"), value); |
1208 | value >>= 1; | |
1209 | x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16; | |
1210 | bfd_putl16 ((bfd_vma) x, where); | |
c6a7ab1f | 1211 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
adde6300 AM |
1212 | } |
1213 | break; | |
1214 | ||
1215 | default: | |
c6a7ab1f | 1216 | as_fatal (_("line %d: unknown relocation type: 0x%x"), |
94f592af | 1217 | fixP->fx_line, fixP->fx_r_type); |
adde6300 AM |
1218 | break; |
1219 | } | |
1220 | } | |
1221 | else | |
1222 | { | |
94f592af | 1223 | switch (fixP->fx_r_type) |
adde6300 AM |
1224 | { |
1225 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
1226 | case -BFD_RELOC_AVR_HI8_LDI: | |
1227 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
1228 | case -BFD_RELOC_AVR_LO8_LDI: | |
94f592af | 1229 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1230 | _("only constant expression allowed")); |
94f592af | 1231 | fixP->fx_done = 1; |
adde6300 AM |
1232 | break; |
1233 | default: | |
1234 | break; | |
1235 | } | |
adde6300 | 1236 | } |
adde6300 AM |
1237 | } |
1238 | ||
7be1c489 AM |
1239 | /* GAS will call this to generate a reloc, passing the resulting reloc |
1240 | to `bfd_install_relocation'. This currently works poorly, as | |
1241 | `bfd_install_relocation' often does the wrong thing, and instances of | |
1242 | `tc_gen_reloc' have been written to work around the problems, which | |
1243 | in turns makes it difficult to fix `bfd_install_relocation'. */ | |
adde6300 AM |
1244 | |
1245 | /* If while processing a fixup, a reloc really needs to be created | |
1246 | then it is done here. */ | |
1247 | ||
1248 | arelent * | |
dc191a8f NC |
1249 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, |
1250 | fixS *fixp) | |
adde6300 AM |
1251 | { |
1252 | arelent *reloc; | |
1253 | ||
df406460 NC |
1254 | if (fixp->fx_addsy && fixp->fx_subsy) |
1255 | { | |
1256 | long value = 0; | |
1257 | ||
1258 | if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy)) | |
1259 | || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section) | |
1260 | { | |
1261 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1262 | "Difference of symbols in different sections is not supported"); | |
1263 | return NULL; | |
1264 | } | |
1265 | ||
28c9d252 | 1266 | /* We are dealing with two symbols defined in the same section. |
df406460 NC |
1267 | Let us fix-up them here. */ |
1268 | value += S_GET_VALUE (fixp->fx_addsy); | |
1269 | value -= S_GET_VALUE (fixp->fx_subsy); | |
1270 | ||
1271 | /* When fx_addsy and fx_subsy both are zero, md_apply_fix | |
1272 | only takes it's second operands for the fixup value. */ | |
1273 | fixp->fx_addsy = NULL; | |
1274 | fixp->fx_subsy = NULL; | |
1275 | md_apply_fix (fixp, (valueT *) &value, NULL); | |
1276 | ||
1277 | return NULL; | |
1278 | } | |
1279 | ||
dc191a8f | 1280 | reloc = xmalloc (sizeof (arelent)); |
adde6300 | 1281 | |
dc191a8f | 1282 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
adde6300 AM |
1283 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
1284 | ||
1285 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1286 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1287 | if (reloc->howto == (reloc_howto_type *) NULL) | |
1288 | { | |
1289 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
c6a7ab1f NC |
1290 | _("reloc %d not supported by object file format"), |
1291 | (int) fixp->fx_r_type); | |
adde6300 AM |
1292 | return NULL; |
1293 | } | |
1294 | ||
1295 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1296 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1297 | reloc->address = fixp->fx_offset; | |
1298 | ||
1299 | reloc->addend = fixp->fx_offset; | |
1300 | ||
1301 | return reloc; | |
1302 | } | |
1303 | ||
adde6300 | 1304 | void |
dc191a8f | 1305 | md_assemble (char *str) |
adde6300 | 1306 | { |
c6a7ab1f | 1307 | struct avr_opcodes_s *opcode; |
adde6300 AM |
1308 | char op[11]; |
1309 | ||
c6a7ab1f | 1310 | str = skip_space (extract_word (str, op, sizeof (op))); |
adde6300 AM |
1311 | |
1312 | if (!op[0]) | |
00d2865b | 1313 | as_bad (_("can't find opcode ")); |
adde6300 AM |
1314 | |
1315 | opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op); | |
1316 | ||
1317 | if (opcode == NULL) | |
1318 | { | |
00d2865b | 1319 | as_bad (_("unknown opcode `%s'"), op); |
adde6300 AM |
1320 | return; |
1321 | } | |
1322 | ||
b170af93 | 1323 | /* Special case for opcodes with optional operands (lpm, elpm) - |
1188e082 | 1324 | version with operands exists in avr_opcodes[] in the next entry. */ |
c6a7ab1f | 1325 | |
1188e082 DC |
1326 | if (*str && *opcode->constraints == '?') |
1327 | ++opcode; | |
b170af93 | 1328 | |
00d2865b NC |
1329 | if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa) |
1330 | as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name); | |
adde6300 AM |
1331 | |
1332 | /* We used to set input_line_pointer to the result of get_operands, | |
1333 | but that is wrong. Our caller assumes we don't change it. */ | |
1334 | { | |
1335 | char *t = input_line_pointer; | |
dc191a8f | 1336 | |
adde6300 | 1337 | avr_operands (opcode, &str); |
b170af93 | 1338 | if (*skip_space (str)) |
00d2865b | 1339 | as_bad (_("garbage at end of line")); |
adde6300 AM |
1340 | input_line_pointer = t; |
1341 | } | |
1342 | } | |
1343 | ||
adde6300 | 1344 | /* Flag to pass `pm' mode between `avr_parse_cons_expression' and |
c6a7ab1f | 1345 | `avr_cons_fix_new'. */ |
adde6300 AM |
1346 | static int exp_mod_pm = 0; |
1347 | ||
1348 | /* Parse special CONS expression: pm (expression) | |
28c9d252 NC |
1349 | or alternatively: gs (expression). |
1350 | These are used for addressing program memory. | |
c6a7ab1f NC |
1351 | Relocation: BFD_RELOC_AVR_16_PM. */ |
1352 | ||
adde6300 | 1353 | void |
dc191a8f | 1354 | avr_parse_cons_expression (expressionS *exp, int nbytes) |
adde6300 | 1355 | { |
c6a7ab1f | 1356 | char *tmp; |
adde6300 AM |
1357 | |
1358 | exp_mod_pm = 0; | |
1359 | ||
1360 | tmp = input_line_pointer = skip_space (input_line_pointer); | |
1361 | ||
1362 | if (nbytes == 2) | |
1363 | { | |
28c9d252 NC |
1364 | char *pm_name1 = "pm"; |
1365 | char *pm_name2 = "gs"; | |
1366 | int len = strlen (pm_name1); | |
1367 | /* len must be the same for both pm identifiers. */ | |
1dab94dd | 1368 | |
28c9d252 NC |
1369 | if (strncasecmp (input_line_pointer, pm_name1, len) == 0 |
1370 | || strncasecmp (input_line_pointer, pm_name2, len) == 0) | |
adde6300 AM |
1371 | { |
1372 | input_line_pointer = skip_space (input_line_pointer + len); | |
1dab94dd | 1373 | |
adde6300 AM |
1374 | if (*input_line_pointer == '(') |
1375 | { | |
1376 | input_line_pointer = skip_space (input_line_pointer + 1); | |
1377 | exp_mod_pm = 1; | |
1378 | expression (exp); | |
1dab94dd | 1379 | |
adde6300 AM |
1380 | if (*input_line_pointer == ')') |
1381 | ++input_line_pointer; | |
1382 | else | |
1383 | { | |
00d2865b | 1384 | as_bad (_("`)' required")); |
adde6300 AM |
1385 | exp_mod_pm = 0; |
1386 | } | |
1dab94dd | 1387 | |
adde6300 AM |
1388 | return; |
1389 | } | |
1dab94dd | 1390 | |
adde6300 AM |
1391 | input_line_pointer = tmp; |
1392 | } | |
1393 | } | |
1dab94dd | 1394 | |
adde6300 AM |
1395 | expression (exp); |
1396 | } | |
1397 | ||
1398 | void | |
dc191a8f NC |
1399 | avr_cons_fix_new (fragS *frag, |
1400 | int where, | |
1401 | int nbytes, | |
1402 | expressionS *exp) | |
adde6300 AM |
1403 | { |
1404 | if (exp_mod_pm == 0) | |
1405 | { | |
1406 | if (nbytes == 2) | |
b34976b6 | 1407 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16); |
adde6300 | 1408 | else if (nbytes == 4) |
b34976b6 | 1409 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32); |
adde6300 | 1410 | else |
00d2865b | 1411 | as_bad (_("illegal %srelocation size: %d"), "", nbytes); |
adde6300 AM |
1412 | } |
1413 | else | |
1414 | { | |
1415 | if (nbytes == 2) | |
b34976b6 | 1416 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_AVR_16_PM); |
adde6300 | 1417 | else |
00d2865b | 1418 | as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes); |
adde6300 AM |
1419 | exp_mod_pm = 0; |
1420 | } | |
1421 | } |