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adde6300 AM |
1 | /* tc-avr.c -- Assembler code for the ATMEL AVR |
2 | ||
2571583a | 3 | Copyright (C) 1999-2017 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 | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
adde6300 AM |
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 | |
4b4da160 NC |
20 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
adde6300 | 22 | |
adde6300 | 23 | #include "as.h" |
3882b010 | 24 | #include "safe-ctype.h" |
adde6300 | 25 | #include "subsegs.h" |
32f76c67 | 26 | #include "struc-symbol.h" |
fb5b7503 | 27 | #include "dwarf2dbg.h" |
af3ecb4a | 28 | #include "dw2gencfi.h" |
eac7440d | 29 | #include "elf/avr.h" |
fdd410ac AB |
30 | #include "elf32-avr.h" |
31 | ||
32 | /* For building a linked list of AVR_PROPERTY_RECORD structures. */ | |
33 | struct avr_property_record_link | |
34 | { | |
35 | struct avr_property_record record; | |
36 | struct avr_property_record_link *next; | |
37 | }; | |
adde6300 | 38 | |
1188e082 DC |
39 | struct avr_opcodes_s |
40 | { | |
e0471c16 TS |
41 | const char * name; |
42 | const char * constraints; | |
43 | const char * opcode; | |
dc191a8f NC |
44 | int insn_size; /* In words. */ |
45 | int isa; | |
46 | unsigned int bin_opcode; | |
1188e082 DC |
47 | }; |
48 | ||
49 | #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \ | |
8cc66334 | 50 | {#NAME, CONSTR, OPCODE, SIZE, ISA, BIN}, |
1188e082 DC |
51 | |
52 | struct avr_opcodes_s avr_opcodes[] = | |
53 | { | |
54 | #include "opcode/avr.h" | |
8cc66334 | 55 | {NULL, NULL, NULL, 0, 0, 0} |
1188e082 DC |
56 | }; |
57 | ||
32f76c67 GJL |
58 | |
59 | /* Stuff for the `__gcc_isr' pseudo instruction. | |
60 | ||
61 | Purpose of the pseudo instruction is to emit more efficient ISR prologues | |
62 | and epilogues than GCC currently does. GCC has no explicit (on RTL level) | |
63 | modelling of SREG, TMP_REG or ZERO_REG. These regs are used implicitly | |
64 | during instruction printing. That doesn't hurt too much for ordinary | |
65 | functions, however for small ISRs there might be some overhead. | |
66 | ||
67 | As implementing http://gcc.gnu.org/PR20296 would imply an almost complete | |
68 | rewite of GCC's AVR back-end (which might pop up less optimized code in | |
69 | other places), we provide a pseudo-instruction which is resolved by GAS | |
70 | into ISR prologue / epilogue as expected by GCC. | |
71 | ||
72 | Using GAS for this purpose has the additional benefit that it can scan | |
73 | code emit by inline asm which is opaque to GCC. | |
74 | ||
75 | The pseudo-instruction is only supposed to handle the starting of | |
76 | prologue and the ending of epilogues (without RETI) which deal with | |
77 | SREG, TMP_REG and ZERO_REG and one additional, optional general purpose | |
78 | register. | |
79 | ||
80 | __gcc_isr consists of 3 different "chunks": | |
81 | ||
82 | __gcc_isr 1 | |
83 | Chunk 1 (ISR_CHUNK_Prologue) | |
84 | Start the ISR code. Will be replaced by ISR prologue by next Done chunk. | |
85 | Must be the 1st chunk in a file or follow a Done chunk from previous | |
86 | ISR (which has been patched already). | |
87 | ||
88 | It will finish the current frag and emit a new frag of | |
89 | type rs_machine_dependent, subtype ISR_CHUNK_Prologue. | |
90 | ||
91 | __gcc_isr 2 | |
92 | Chunk 2 (ISR_CHUNK_Epilogue) | |
93 | Will be replaced by ISR epilogue by next Done chunk. Must follow | |
94 | chunk 1 (Prologue) or chunk 2 (Epilogue). Functions might come | |
95 | without epilogue or with more than one epilogue, and even code | |
96 | located statically after the last epilogue might belong to a function. | |
97 | ||
98 | It will finish the current frag and emit a new frag of | |
99 | type rs_machine_dependent, subtype ISR_CHUNK_Epilogue. | |
100 | ||
101 | __gcc_isr 0, Rx | |
102 | Chunk 0 (ISR_CHUNK_Done) | |
103 | Must follow chunk 1 (Prologue) or chunk 2 (Epilogue) and finishes | |
104 | the ISR code. Only GCC can know where a function's code ends. | |
105 | ||
106 | It triggers the patch-up of all rs_machine_dependent frags in the | |
107 | current frag chain and turns them into ordinary rs_fill code frags. | |
108 | ||
109 | If Rx is a register > ZERO_REG then GCC also wants to push / pop Rx. | |
110 | If neither TMP_REG nor ZERO_REG are needed, Rx will be used in | |
111 | the push / pop sequence avoiding the need for TMP_REG / ZERO_REG. | |
112 | If Rx <= ZERO_REG then GCC doesn't assume anything about Rx. | |
113 | ||
114 | Assumptions: | |
115 | ||
116 | o GCC takes care of code that is opaque to GAS like tail calls | |
117 | or non-local goto. | |
118 | ||
119 | o Using SEI / CLI does not count as clobbering SREG. This is | |
120 | because a final RETI will restore the I-flag. | |
121 | ||
122 | o Using OUT or ST* is supposed not to clobber SREG. Sequences like | |
123 | ||
124 | IN-SREG + CLI + Atomic-Code + OUT-SREG | |
125 | ||
126 | will still work as expected because the scan will reveal any | |
127 | clobber of SREG other than I-flag and emit PUSH / POP of SREG. | |
128 | */ | |
129 | ||
130 | enum | |
131 | { | |
132 | ISR_CHUNK_Done = 0, | |
133 | ISR_CHUNK_Prologue = 1, | |
134 | ISR_CHUNK_Epilogue = 2 | |
135 | }; | |
136 | ||
137 | static struct | |
138 | { | |
139 | /* Previous __gcc_isr chunk (one of the enums above) | |
140 | and it's location for diagnostics. */ | |
141 | int prev_chunk; | |
142 | unsigned line; | |
143 | const char *file; | |
144 | /* Replacer for __gcc_isr.n_pushed once we know how many regs are | |
145 | pushed by the Prologue chunk. */ | |
146 | symbolS *sym_n_pushed; | |
147 | ||
148 | /* Set and used during parse from chunk 1 (Prologue) up to chunk 0 (Done). | |
149 | Set by `avr_update_gccisr' and used by `avr_patch_gccisr_frag'. */ | |
150 | int need_reg_tmp; | |
151 | int need_reg_zero; | |
152 | int need_sreg; | |
153 | } avr_isr; | |
154 | ||
155 | static void avr_gccisr_operands (struct avr_opcodes_s*, char**); | |
156 | static void avr_update_gccisr (struct avr_opcodes_s*, int, int); | |
157 | static struct avr_opcodes_s *avr_gccisr_opcode; | |
158 | ||
adde6300 AM |
159 | const char comment_chars[] = ";"; |
160 | const char line_comment_chars[] = "#"; | |
161 | const char line_separator_chars[] = "$"; | |
162 | ||
adde6300 AM |
163 | const char *md_shortopts = "m:"; |
164 | struct mcu_type_s | |
165 | { | |
e0471c16 | 166 | const char *name; |
adde6300 AM |
167 | int isa; |
168 | int mach; | |
169 | }; | |
170 | ||
1f8ae5e6 | 171 | /* XXX - devices that don't seem to exist (renamed, replaced with larger |
7b21ac3f | 172 | ones, or planned but never produced), left here for compatibility. */ |
1f8ae5e6 | 173 | |
adde6300 AM |
174 | static struct mcu_type_s mcu_types[] = |
175 | { | |
7b21ac3f | 176 | {"avr1", AVR_ISA_AVR1, bfd_mach_avr1}, |
33eaf5de | 177 | /* TODO: instruction set for avr2 architecture should be AVR_ISA_AVR2, |
99700d6f NC |
178 | but set to AVR_ISA_AVR25 for some following version |
179 | of GCC (from 4.3) for backward compatibility. */ | |
7b21ac3f EW |
180 | {"avr2", AVR_ISA_AVR25, bfd_mach_avr2}, |
181 | {"avr25", AVR_ISA_AVR25, bfd_mach_avr25}, | |
33eaf5de | 182 | /* TODO: instruction set for avr3 architecture should be AVR_ISA_AVR3, |
99700d6f | 183 | but set to AVR_ISA_AVR3_ALL for some following version |
7b21ac3f EW |
184 | of GCC (from 4.3) for backward compatibility. */ |
185 | {"avr3", AVR_ISA_AVR3_ALL, bfd_mach_avr3}, | |
186 | {"avr31", AVR_ISA_AVR31, bfd_mach_avr31}, | |
187 | {"avr35", AVR_ISA_AVR35, bfd_mach_avr35}, | |
188 | {"avr4", AVR_ISA_AVR4, bfd_mach_avr4}, | |
33eaf5de | 189 | /* TODO: instruction set for avr5 architecture should be AVR_ISA_AVR5, |
99700d6f | 190 | but set to AVR_ISA_AVR51 for some following version |
7b21ac3f EW |
191 | of GCC (from 4.3) for backward compatibility. */ |
192 | {"avr5", AVR_ISA_AVR51, bfd_mach_avr5}, | |
193 | {"avr51", AVR_ISA_AVR51, bfd_mach_avr51}, | |
194 | {"avr6", AVR_ISA_AVR6, bfd_mach_avr6}, | |
8cc66334 EW |
195 | {"avrxmega1", AVR_ISA_XMEGA, bfd_mach_avrxmega1}, |
196 | {"avrxmega2", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, | |
197 | {"avrxmega3", AVR_ISA_XMEGA, bfd_mach_avrxmega3}, | |
198 | {"avrxmega4", AVR_ISA_XMEGA, bfd_mach_avrxmega4}, | |
199 | {"avrxmega5", AVR_ISA_XMEGA, bfd_mach_avrxmega5}, | |
200 | {"avrxmega6", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, | |
201 | {"avrxmega7", AVR_ISA_XMEGA, bfd_mach_avrxmega7}, | |
f36e8886 | 202 | {"avrtiny", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, |
28c9d252 | 203 | {"at90s1200", AVR_ISA_1200, bfd_mach_avr1}, |
7b21ac3f EW |
204 | {"attiny11", AVR_ISA_AVR1, bfd_mach_avr1}, |
205 | {"attiny12", AVR_ISA_AVR1, bfd_mach_avr1}, | |
206 | {"attiny15", AVR_ISA_AVR1, bfd_mach_avr1}, | |
207 | {"attiny28", AVR_ISA_AVR1, bfd_mach_avr1}, | |
208 | {"at90s2313", AVR_ISA_AVR2, bfd_mach_avr2}, | |
209 | {"at90s2323", AVR_ISA_AVR2, bfd_mach_avr2}, | |
210 | {"at90s2333", AVR_ISA_AVR2, bfd_mach_avr2}, /* XXX -> 4433 */ | |
211 | {"at90s2343", AVR_ISA_AVR2, bfd_mach_avr2}, | |
212 | {"attiny22", AVR_ISA_AVR2, bfd_mach_avr2}, /* XXX -> 2343 */ | |
d669d37f | 213 | {"attiny26", AVR_ISA_2xxe, bfd_mach_avr2}, |
7b21ac3f EW |
214 | {"at90s4414", AVR_ISA_AVR2, bfd_mach_avr2}, /* XXX -> 8515 */ |
215 | {"at90s4433", AVR_ISA_AVR2, bfd_mach_avr2}, | |
216 | {"at90s4434", AVR_ISA_AVR2, bfd_mach_avr2}, /* XXX -> 8535 */ | |
217 | {"at90s8515", AVR_ISA_AVR2, bfd_mach_avr2}, | |
218 | {"at90c8534", AVR_ISA_AVR2, bfd_mach_avr2}, | |
219 | {"at90s8535", AVR_ISA_AVR2, bfd_mach_avr2}, | |
255d9eec | 220 | {"ata5272", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f EW |
221 | {"attiny13", AVR_ISA_AVR25, bfd_mach_avr25}, |
222 | {"attiny13a", AVR_ISA_AVR25, bfd_mach_avr25}, | |
223 | {"attiny2313", AVR_ISA_AVR25, bfd_mach_avr25}, | |
8453da2e | 224 | {"attiny2313a",AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f | 225 | {"attiny24", AVR_ISA_AVR25, bfd_mach_avr25}, |
8453da2e EW |
226 | {"attiny24a", AVR_ISA_AVR25, bfd_mach_avr25}, |
227 | {"attiny4313", AVR_ISA_AVR25, bfd_mach_avr25}, | |
7b21ac3f | 228 | {"attiny44", AVR_ISA_AVR25, bfd_mach_avr25}, |
8453da2e | 229 | {"attiny44a", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f | 230 | {"attiny84", AVR_ISA_AVR25, bfd_mach_avr25}, |
e760a81b | 231 | {"attiny84a", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f EW |
232 | {"attiny25", AVR_ISA_AVR25, bfd_mach_avr25}, |
233 | {"attiny45", AVR_ISA_AVR25, bfd_mach_avr25}, | |
234 | {"attiny85", AVR_ISA_AVR25, bfd_mach_avr25}, | |
235 | {"attiny261", AVR_ISA_AVR25, bfd_mach_avr25}, | |
8453da2e | 236 | {"attiny261a", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f | 237 | {"attiny461", AVR_ISA_AVR25, bfd_mach_avr25}, |
e760a81b | 238 | {"attiny461a", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f | 239 | {"attiny861", AVR_ISA_AVR25, bfd_mach_avr25}, |
8453da2e | 240 | {"attiny861a", AVR_ISA_AVR25, bfd_mach_avr25}, |
2b02f87c | 241 | {"attiny87", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f EW |
242 | {"attiny43u", AVR_ISA_AVR25, bfd_mach_avr25}, |
243 | {"attiny48", AVR_ISA_AVR25, bfd_mach_avr25}, | |
244 | {"attiny88", AVR_ISA_AVR25, bfd_mach_avr25}, | |
255d9eec | 245 | {"attiny828", AVR_ISA_AVR25, bfd_mach_avr25}, |
7b21ac3f EW |
246 | {"at86rf401", AVR_ISA_RF401, bfd_mach_avr25}, |
247 | {"at43usb355", AVR_ISA_AVR3, bfd_mach_avr3}, | |
248 | {"at76c711", AVR_ISA_AVR3, bfd_mach_avr3}, | |
249 | {"atmega103", AVR_ISA_AVR31, bfd_mach_avr31}, | |
250 | {"at43usb320", AVR_ISA_AVR31, bfd_mach_avr31}, | |
251 | {"attiny167", AVR_ISA_AVR35, bfd_mach_avr35}, | |
252 | {"at90usb82", AVR_ISA_AVR35, bfd_mach_avr35}, | |
253 | {"at90usb162", AVR_ISA_AVR35, bfd_mach_avr35}, | |
255d9eec | 254 | {"ata5505", AVR_ISA_AVR35, bfd_mach_avr35}, |
11908008 EW |
255 | {"atmega8u2", AVR_ISA_AVR35, bfd_mach_avr35}, |
256 | {"atmega16u2", AVR_ISA_AVR35, bfd_mach_avr35}, | |
257 | {"atmega32u2", AVR_ISA_AVR35, bfd_mach_avr35}, | |
255d9eec | 258 | {"attiny1634", AVR_ISA_AVR35, bfd_mach_avr35}, |
28c9d252 | 259 | {"atmega8", AVR_ISA_M8, bfd_mach_avr4}, |
8be59acb | 260 | {"ata6289", AVR_ISA_AVR4, bfd_mach_avr4}, |
255d9eec DC |
261 | {"atmega8a", AVR_ISA_M8, bfd_mach_avr4}, |
262 | {"ata6285", AVR_ISA_AVR4, bfd_mach_avr4}, | |
263 | {"ata6286", AVR_ISA_AVR4, bfd_mach_avr4}, | |
7b21ac3f | 264 | {"atmega48", AVR_ISA_AVR4, bfd_mach_avr4}, |
e760a81b | 265 | {"atmega48a", AVR_ISA_AVR4, bfd_mach_avr4}, |
255d9eec | 266 | {"atmega48pa", AVR_ISA_AVR4, bfd_mach_avr4}, |
7b21ac3f EW |
267 | {"atmega48p", AVR_ISA_AVR4, bfd_mach_avr4}, |
268 | {"atmega88", AVR_ISA_AVR4, bfd_mach_avr4}, | |
e760a81b | 269 | {"atmega88a", AVR_ISA_AVR4, bfd_mach_avr4}, |
7b21ac3f | 270 | {"atmega88p", AVR_ISA_AVR4, bfd_mach_avr4}, |
e760a81b | 271 | {"atmega88pa", AVR_ISA_AVR4, bfd_mach_avr4}, |
28c9d252 NC |
272 | {"atmega8515", AVR_ISA_M8, bfd_mach_avr4}, |
273 | {"atmega8535", AVR_ISA_M8, bfd_mach_avr4}, | |
7b21ac3f EW |
274 | {"atmega8hva", AVR_ISA_AVR4, bfd_mach_avr4}, |
275 | {"at90pwm1", AVR_ISA_AVR4, bfd_mach_avr4}, | |
276 | {"at90pwm2", AVR_ISA_AVR4, bfd_mach_avr4}, | |
277 | {"at90pwm2b", AVR_ISA_AVR4, bfd_mach_avr4}, | |
278 | {"at90pwm3", AVR_ISA_AVR4, bfd_mach_avr4}, | |
279 | {"at90pwm3b", AVR_ISA_AVR4, bfd_mach_avr4}, | |
2b02f87c | 280 | {"at90pwm81", AVR_ISA_AVR4, bfd_mach_avr4}, |
255d9eec DC |
281 | {"at90pwm161", AVR_ISA_AVR5, bfd_mach_avr5}, |
282 | {"ata5790", AVR_ISA_AVR5, bfd_mach_avr5}, | |
283 | {"ata5795", AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 284 | {"atmega16", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 285 | {"atmega16a", AVR_ISA_AVR5, bfd_mach_avr5}, |
28c9d252 | 286 | {"atmega161", AVR_ISA_M161, bfd_mach_avr5}, |
7b21ac3f | 287 | {"atmega162", AVR_ISA_AVR5, bfd_mach_avr5}, |
28c9d252 | 288 | {"atmega163", AVR_ISA_M161, bfd_mach_avr5}, |
e760a81b | 289 | {"atmega164a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 290 | {"atmega164p", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 291 | {"atmega164pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 292 | {"atmega165", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 293 | {"atmega165a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 294 | {"atmega165p", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 295 | {"atmega165pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 296 | {"atmega168", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 297 | {"atmega168a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 298 | {"atmega168p", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 299 | {"atmega168pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 300 | {"atmega169", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 301 | {"atmega169a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 302 | {"atmega169p", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 303 | {"atmega169pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 304 | {"atmega32", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 305 | {"atmega32a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 306 | {"atmega323", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 307 | {"atmega324a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 308 | {"atmega324p", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 309 | {"atmega324pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 310 | {"atmega325", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 311 | {"atmega325a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 312 | {"atmega325p", AVR_ISA_AVR5, bfd_mach_avr5}, |
b8c610a7 | 313 | {"atmega325pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 314 | {"atmega3250", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 315 | {"atmega3250a",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 316 | {"atmega3250p",AVR_ISA_AVR5, bfd_mach_avr5}, |
b8c610a7 | 317 | {"atmega3250pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 318 | {"atmega328", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f EW |
319 | {"atmega328p", AVR_ISA_AVR5, bfd_mach_avr5}, |
320 | {"atmega329", AVR_ISA_AVR5, bfd_mach_avr5}, | |
e760a81b | 321 | {"atmega329a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 322 | {"atmega329p", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 323 | {"atmega329pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 324 | {"atmega3290", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b | 325 | {"atmega3290a",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 326 | {"atmega3290p",AVR_ISA_AVR5, bfd_mach_avr5}, |
b8c610a7 | 327 | {"atmega3290pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 328 | {"atmega406", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec DC |
329 | {"atmega64rfr2", AVR_ISA_AVR5, bfd_mach_avr5}, |
330 | {"atmega644rfr2",AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 331 | {"atmega64", AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 332 | {"atmega64a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f EW |
333 | {"atmega640", AVR_ISA_AVR5, bfd_mach_avr5}, |
334 | {"atmega644", AVR_ISA_AVR5, bfd_mach_avr5}, | |
e760a81b | 335 | {"atmega644a", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 336 | {"atmega644p", AVR_ISA_AVR5, bfd_mach_avr5}, |
8453da2e | 337 | {"atmega644pa",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 338 | {"atmega645", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b EW |
339 | {"atmega645a", AVR_ISA_AVR5, bfd_mach_avr5}, |
340 | {"atmega645p", AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 341 | {"atmega649", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b EW |
342 | {"atmega649a", AVR_ISA_AVR5, bfd_mach_avr5}, |
343 | {"atmega649p", AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 344 | {"atmega6450", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b EW |
345 | {"atmega6450a",AVR_ISA_AVR5, bfd_mach_avr5}, |
346 | {"atmega6450p",AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 347 | {"atmega6490", AVR_ISA_AVR5, bfd_mach_avr5}, |
e760a81b EW |
348 | {"atmega6490a",AVR_ISA_AVR5, bfd_mach_avr5}, |
349 | {"atmega6490p",AVR_ISA_AVR5, bfd_mach_avr5}, | |
4d13caa0 NC |
350 | {"atmega64rfr2",AVR_ISA_AVR5, bfd_mach_avr5}, |
351 | {"atmega644rfr2",AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 352 | {"atmega16hva",AVR_ISA_AVR5, bfd_mach_avr5}, |
255d9eec | 353 | {"atmega16hva2",AVR_ISA_AVR5, bfd_mach_avr5}, |
2b02f87c | 354 | {"atmega16hvb",AVR_ISA_AVR5, bfd_mach_avr5}, |
b8c610a7 | 355 | {"atmega16hvbrevb",AVR_ISA_AVR5,bfd_mach_avr5}, |
2b02f87c | 356 | {"atmega32hvb",AVR_ISA_AVR5, bfd_mach_avr5}, |
b8c610a7 | 357 | {"atmega32hvbrevb",AVR_ISA_AVR5,bfd_mach_avr5}, |
e760a81b | 358 | {"atmega64hve",AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f EW |
359 | {"at90can32" , AVR_ISA_AVR5, bfd_mach_avr5}, |
360 | {"at90can64" , AVR_ISA_AVR5, bfd_mach_avr5}, | |
b8c610a7 | 361 | {"at90pwm161", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f EW |
362 | {"at90pwm216", AVR_ISA_AVR5, bfd_mach_avr5}, |
363 | {"at90pwm316", AVR_ISA_AVR5, bfd_mach_avr5}, | |
364 | {"atmega32c1", AVR_ISA_AVR5, bfd_mach_avr5}, | |
2b02f87c NC |
365 | {"atmega64c1", AVR_ISA_AVR5, bfd_mach_avr5}, |
366 | {"atmega16m1", AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 367 | {"atmega32m1", AVR_ISA_AVR5, bfd_mach_avr5}, |
2b02f87c NC |
368 | {"atmega64m1", AVR_ISA_AVR5, bfd_mach_avr5}, |
369 | {"atmega16u4", AVR_ISA_AVR5, bfd_mach_avr5}, | |
7b21ac3f | 370 | {"atmega32u4", AVR_ISA_AVR5, bfd_mach_avr5}, |
2b02f87c | 371 | {"atmega32u6", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f EW |
372 | {"at90usb646", AVR_ISA_AVR5, bfd_mach_avr5}, |
373 | {"at90usb647", AVR_ISA_AVR5, bfd_mach_avr5}, | |
2b02f87c | 374 | {"at90scr100", AVR_ISA_AVR5, bfd_mach_avr5}, |
28c9d252 | 375 | {"at94k", AVR_ISA_94K, bfd_mach_avr5}, |
e760a81b | 376 | {"m3000", AVR_ISA_AVR5, bfd_mach_avr5}, |
7b21ac3f | 377 | {"atmega128", AVR_ISA_AVR51, bfd_mach_avr51}, |
255d9eec | 378 | {"atmega128a", AVR_ISA_AVR51, bfd_mach_avr51}, |
7b21ac3f EW |
379 | {"atmega1280", AVR_ISA_AVR51, bfd_mach_avr51}, |
380 | {"atmega1281", AVR_ISA_AVR51, bfd_mach_avr51}, | |
255d9eec | 381 | {"atmega1284", AVR_ISA_AVR51, bfd_mach_avr51}, |
7b21ac3f | 382 | {"atmega1284p",AVR_ISA_AVR51, bfd_mach_avr51}, |
17f4880d | 383 | {"atmega128rfa1",AVR_ISA_AVR51, bfd_mach_avr51}, |
4d13caa0 NC |
384 | {"atmega128rfr2",AVR_ISA_AVR51, bfd_mach_avr51}, |
385 | {"atmega1284rfr2",AVR_ISA_AVR51, bfd_mach_avr51}, | |
7b21ac3f EW |
386 | {"at90can128", AVR_ISA_AVR51, bfd_mach_avr51}, |
387 | {"at90usb1286",AVR_ISA_AVR51, bfd_mach_avr51}, | |
388 | {"at90usb1287",AVR_ISA_AVR51, bfd_mach_avr51}, | |
389 | {"atmega2560", AVR_ISA_AVR6, bfd_mach_avr6}, | |
390 | {"atmega2561", AVR_ISA_AVR6, bfd_mach_avr6}, | |
4d13caa0 NC |
391 | {"atmega256rfr2", AVR_ISA_AVR6, bfd_mach_avr6}, |
392 | {"atmega2564rfr2", AVR_ISA_AVR6, bfd_mach_avr6}, | |
8cc66334 | 393 | {"atxmega16a4", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, |
255d9eec DC |
394 | {"atxmega16a4u",AVR_ISA_XMEGAU, bfd_mach_avrxmega2}, |
395 | {"atxmega16c4", AVR_ISA_XMEGAU, bfd_mach_avrxmega2}, | |
8cc66334 EW |
396 | {"atxmega16d4", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, |
397 | {"atxmega32a4", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, | |
255d9eec DC |
398 | {"atxmega32a4u",AVR_ISA_XMEGAU, bfd_mach_avrxmega2}, |
399 | {"atxmega32c4", AVR_ISA_XMEGAU, bfd_mach_avrxmega2}, | |
8cc66334 | 400 | {"atxmega32d4", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, |
255d9eec DC |
401 | {"atxmega32e5", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, |
402 | {"atxmega16e5", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, | |
403 | {"atxmega8e5", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, | |
6f8a4444 | 404 | {"atxmega32x1", AVR_ISA_XMEGA, bfd_mach_avrxmega2}, |
f4203b2b JL |
405 | {"attiny416", AVR_ISA_XMEGA, bfd_mach_avrxmega3}, |
406 | {"attiny417", AVR_ISA_XMEGA, bfd_mach_avrxmega3}, | |
407 | {"attiny816", AVR_ISA_XMEGA, bfd_mach_avrxmega3}, | |
408 | {"attiny817", AVR_ISA_XMEGA, bfd_mach_avrxmega3}, | |
8cc66334 | 409 | {"atxmega64a3", AVR_ISA_XMEGA, bfd_mach_avrxmega4}, |
255d9eec DC |
410 | {"atxmega64a3u",AVR_ISA_XMEGAU, bfd_mach_avrxmega4}, |
411 | {"atxmega64a4u",AVR_ISA_XMEGAU, bfd_mach_avrxmega4}, | |
412 | {"atxmega64b1", AVR_ISA_XMEGAU, bfd_mach_avrxmega4}, | |
413 | {"atxmega64b3", AVR_ISA_XMEGAU, bfd_mach_avrxmega4}, | |
414 | {"atxmega64c3", AVR_ISA_XMEGAU, bfd_mach_avrxmega4}, | |
8cc66334 | 415 | {"atxmega64d3", AVR_ISA_XMEGA, bfd_mach_avrxmega4}, |
255d9eec | 416 | {"atxmega64d4", AVR_ISA_XMEGA, bfd_mach_avrxmega4}, |
8cc66334 | 417 | {"atxmega64a1", AVR_ISA_XMEGA, bfd_mach_avrxmega5}, |
7bab7634 | 418 | {"atxmega64a1u",AVR_ISA_XMEGAU, bfd_mach_avrxmega5}, |
8cc66334 | 419 | {"atxmega128a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
255d9eec | 420 | {"atxmega128a3u",AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
7bab7634 | 421 | {"atxmega128b1", AVR_ISA_XMEGAU, bfd_mach_avrxmega6}, |
255d9eec DC |
422 | {"atxmega128b3", AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
423 | {"atxmega128c3", AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, | |
8cc66334 | 424 | {"atxmega128d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
255d9eec | 425 | {"atxmega128d4", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
8cc66334 | 426 | {"atxmega192a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
255d9eec DC |
427 | {"atxmega192a3u",AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
428 | {"atxmega192c3", AVR_ISA_XMEGAU, bfd_mach_avrxmega6}, | |
8cc66334 EW |
429 | {"atxmega192d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
430 | {"atxmega256a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, | |
255d9eec | 431 | {"atxmega256a3u",AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
8cc66334 | 432 | {"atxmega256a3b",AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
7bab7634 | 433 | {"atxmega256a3bu",AVR_ISA_XMEGAU, bfd_mach_avrxmega6}, |
255d9eec | 434 | {"atxmega256c3", AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
8cc66334 | 435 | {"atxmega256d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, |
255d9eec DC |
436 | {"atxmega384c3", AVR_ISA_XMEGAU,bfd_mach_avrxmega6}, |
437 | {"atxmega384d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6}, | |
8cc66334 | 438 | {"atxmega128a1", AVR_ISA_XMEGA, bfd_mach_avrxmega7}, |
7bab7634 | 439 | {"atxmega128a1u", AVR_ISA_XMEGAU, bfd_mach_avrxmega7}, |
255d9eec | 440 | {"atxmega128a4u", AVR_ISA_XMEGAU, bfd_mach_avrxmega7}, |
f36e8886 BS |
441 | {"attiny4", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, |
442 | {"attiny5", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, | |
443 | {"attiny9", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, | |
444 | {"attiny10", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, | |
445 | {"attiny20", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, | |
446 | {"attiny40", AVR_ISA_AVRTINY, bfd_mach_avrtiny}, | |
adde6300 AM |
447 | {NULL, 0, 0} |
448 | }; | |
449 | ||
af910977 | 450 | |
adde6300 | 451 | /* Current MCU type. */ |
7b21ac3f | 452 | static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_AVR2, bfd_mach_avr2}; |
af910977 | 453 | static struct mcu_type_s specified_mcu; |
dc191a8f | 454 | static struct mcu_type_s * avr_mcu = & default_mcu; |
adde6300 | 455 | |
00d2865b NC |
456 | /* AVR target-specific switches. */ |
457 | struct avr_opt_s | |
458 | { | |
dc191a8f NC |
459 | int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes. */ |
460 | int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns. */ | |
461 | int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around. */ | |
edc9e9a6 AB |
462 | int no_link_relax; /* -mno-link-relax / -mlink-relax: generate (or not) |
463 | relocations for linker relaxation. */ | |
32f76c67 | 464 | int have_gccisr; /* Whether "__gcc_isr" is a known (pseudo) insn. */ |
00d2865b NC |
465 | }; |
466 | ||
32f76c67 | 467 | static struct avr_opt_s avr_opt = { 0, 0, 0, 0, 0 }; |
00d2865b | 468 | |
adde6300 AM |
469 | const char EXP_CHARS[] = "eE"; |
470 | const char FLT_CHARS[] = "dD"; | |
dc191a8f NC |
471 | |
472 | static void avr_set_arch (int); | |
adde6300 AM |
473 | |
474 | /* The target specific pseudo-ops which we support. */ | |
475 | const pseudo_typeS md_pseudo_table[] = | |
476 | { | |
477 | {"arch", avr_set_arch, 0}, | |
478 | { NULL, NULL, 0} | |
479 | }; | |
480 | ||
481 | #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00)) | |
adde6300 | 482 | |
dc191a8f NC |
483 | #define EXP_MOD_NAME(i) exp_mod[i].name |
484 | #define EXP_MOD_RELOC(i) exp_mod[i].reloc | |
485 | #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc | |
486 | #define HAVE_PM_P(i) exp_mod[i].have_pm | |
adde6300 AM |
487 | |
488 | struct exp_mod_s | |
489 | { | |
e0471c16 | 490 | const char * name; |
dc191a8f NC |
491 | bfd_reloc_code_real_type reloc; |
492 | bfd_reloc_code_real_type neg_reloc; | |
493 | int have_pm; | |
adde6300 AM |
494 | }; |
495 | ||
c6a7ab1f NC |
496 | static struct exp_mod_s exp_mod[] = |
497 | { | |
adde6300 AM |
498 | {"hh8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 1}, |
499 | {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0}, | |
500 | {"hi8", BFD_RELOC_AVR_HI8_LDI, BFD_RELOC_AVR_HI8_LDI_NEG, 1}, | |
501 | {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0}, | |
502 | {"lo8", BFD_RELOC_AVR_LO8_LDI, BFD_RELOC_AVR_LO8_LDI_NEG, 1}, | |
503 | {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0}, | |
df406460 | 504 | {"hlo8", BFD_RELOC_AVR_HH8_LDI, BFD_RELOC_AVR_HH8_LDI_NEG, 0}, |
e4efb665 | 505 | {"hhi8", BFD_RELOC_AVR_MS8_LDI, BFD_RELOC_AVR_MS8_LDI_NEG, 0}, |
adde6300 AM |
506 | }; |
507 | ||
2b0f3761 | 508 | /* A union used to store indices into the exp_mod[] array |
8ad7c533 NC |
509 | in a hash table which expects void * data types. */ |
510 | typedef union | |
511 | { | |
512 | void * ptr; | |
513 | int index; | |
514 | } mod_index; | |
515 | ||
adde6300 AM |
516 | /* Opcode hash table. */ |
517 | static struct hash_control *avr_hash; | |
518 | ||
519 | /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */ | |
520 | static struct hash_control *avr_mod_hash; | |
521 | ||
32f76c67 GJL |
522 | /* Whether some opcode does not change SREG. */ |
523 | static struct hash_control *avr_no_sreg_hash; | |
524 | ||
525 | static const char* const avr_no_sreg[] = | |
526 | { | |
527 | /* Arithmetic */ | |
528 | "ldi", "swap", "mov", "movw", | |
529 | /* Special instructions. I-Flag will be restored by RETI, and we don't | |
530 | consider I-Flag as being clobbered when changed. */ | |
531 | "sei", "cli", "reti", "brie", "brid", | |
532 | "nop", "wdr", "sleep", | |
533 | /* Load / Store */ | |
534 | "ld", "ldd", "lds", "pop", "in", "lpm", "elpm", | |
535 | "st", "std", "sts", "push", "out", | |
536 | /* Jumps and Calls. Calls might call code that changes SREG. | |
537 | GCC has to filter out ABI calls. The non-ABI transparent calls | |
538 | must use [R]CALL and are filtered out now by not mentioning them. */ | |
539 | "rjmp", "jmp", "ijmp", "ret", | |
540 | /* Skipping. Branches need SREG to be set, hence we regard them | |
541 | as if they changed SREG and don't list them here. */ | |
542 | "sbrc", "sbrs", "sbic", "sbis", "cpse", | |
543 | /* I/O Manipulation */ | |
544 | "sbi", "cbi", | |
545 | /* Read-Modify-Write */ | |
546 | "lac", "las", "lat", "xch" | |
547 | }; | |
548 | ||
00d2865b | 549 | #define OPTION_MMCU 'm' |
dc191a8f NC |
550 | enum options |
551 | { | |
552 | OPTION_ALL_OPCODES = OPTION_MD_BASE + 1, | |
553 | OPTION_NO_SKIP_BUG, | |
af910977 | 554 | OPTION_NO_WRAP, |
e4ef1b6c | 555 | OPTION_ISA_RMW, |
edc9e9a6 | 556 | OPTION_LINK_RELAX, |
32f76c67 GJL |
557 | OPTION_NO_LINK_RELAX, |
558 | OPTION_HAVE_GCCISR | |
dc191a8f | 559 | }; |
adde6300 | 560 | |
c6a7ab1f NC |
561 | struct option md_longopts[] = |
562 | { | |
00d2865b NC |
563 | { "mmcu", required_argument, NULL, OPTION_MMCU }, |
564 | { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES }, | |
565 | { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG }, | |
566 | { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP }, | |
af910977 | 567 | { "mrmw", no_argument, NULL, OPTION_ISA_RMW }, |
e4ef1b6c | 568 | { "mlink-relax", no_argument, NULL, OPTION_LINK_RELAX }, |
edc9e9a6 | 569 | { "mno-link-relax", no_argument, NULL, OPTION_NO_LINK_RELAX }, |
32f76c67 | 570 | { "mgcc-isr", no_argument, NULL, OPTION_HAVE_GCCISR }, |
00d2865b | 571 | { NULL, no_argument, NULL, 0 } |
adde6300 | 572 | }; |
adde6300 | 573 | |
c6a7ab1f | 574 | size_t md_longopts_size = sizeof (md_longopts); |
00d2865b NC |
575 | |
576 | /* Display nicely formatted list of known MCU names. */ | |
c6a7ab1f | 577 | |
00d2865b | 578 | static void |
dc191a8f | 579 | show_mcu_list (FILE *stream) |
00d2865b NC |
580 | { |
581 | int i, x; | |
582 | ||
583 | fprintf (stream, _("Known MCU names:")); | |
584 | x = 1000; | |
1dab94dd | 585 | |
00d2865b NC |
586 | for (i = 0; mcu_types[i].name; i++) |
587 | { | |
588 | int len = strlen (mcu_types[i].name); | |
1dab94dd | 589 | |
00d2865b | 590 | x += len + 1; |
1dab94dd | 591 | |
00d2865b | 592 | if (x < 75) |
c6a7ab1f | 593 | fprintf (stream, " %s", mcu_types[i].name); |
00d2865b NC |
594 | else |
595 | { | |
596 | fprintf (stream, "\n %s", mcu_types[i].name); | |
597 | x = len + 2; | |
598 | } | |
599 | } | |
1dab94dd | 600 | |
c6a7ab1f | 601 | fprintf (stream, "\n"); |
00d2865b NC |
602 | } |
603 | ||
adde6300 | 604 | static inline char * |
dc191a8f | 605 | skip_space (char *s) |
adde6300 AM |
606 | { |
607 | while (*s == ' ' || *s == '\t') | |
608 | ++s; | |
609 | return s; | |
610 | } | |
611 | ||
612 | /* Extract one word from FROM and copy it to TO. */ | |
c6a7ab1f | 613 | |
adde6300 AM |
614 | static char * |
615 | extract_word (char *from, char *to, int limit) | |
616 | { | |
adde6300 AM |
617 | char *op_end; |
618 | int size = 0; | |
619 | ||
620 | /* Drop leading whitespace. */ | |
621 | from = skip_space (from); | |
622 | *to = 0; | |
c6a7ab1f | 623 | |
adde6300 | 624 | /* Find the op code end. */ |
87975d2a | 625 | for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);) |
adde6300 AM |
626 | { |
627 | to[size++] = *op_end++; | |
628 | if (size + 1 >= limit) | |
629 | break; | |
630 | } | |
1dab94dd | 631 | |
adde6300 AM |
632 | to[size] = 0; |
633 | return op_end; | |
634 | } | |
635 | ||
636 | int | |
dc191a8f NC |
637 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, |
638 | asection *seg ATTRIBUTE_UNUSED) | |
adde6300 AM |
639 | { |
640 | abort (); | |
641 | return 0; | |
642 | } | |
643 | ||
644 | void | |
dc191a8f | 645 | md_show_usage (FILE *stream) |
adde6300 | 646 | { |
00d2865b | 647 | fprintf (stream, |
4fb8d1c6 | 648 | _("AVR Assembler options:\n" |
adde6300 AM |
649 | " -mmcu=[avr-name] select microcontroller variant\n" |
650 | " [avr-name] can be:\n" | |
7b21ac3f EW |
651 | " avr1 - classic AVR core without data RAM\n" |
652 | " avr2 - classic AVR core with up to 8K program memory\n" | |
653 | " avr25 - classic AVR core with up to 8K program memory\n" | |
654 | " plus the MOVW instruction\n" | |
655 | " avr3 - classic AVR core with up to 64K program memory\n" | |
656 | " avr31 - classic AVR core with up to 128K program memory\n" | |
657 | " avr35 - classic AVR core with up to 64K program memory\n" | |
658 | " plus the MOVW instruction\n" | |
659 | " avr4 - enhanced AVR core with up to 8K program memory\n" | |
660 | " avr5 - enhanced AVR core with up to 64K program memory\n" | |
661 | " avr51 - enhanced AVR core with up to 128K program memory\n" | |
662 | " avr6 - enhanced AVR core with up to 256K program memory\n" | |
8c997c27 | 663 | " avrxmega2 - XMEGA, > 8K, < 64K FLASH, < 64K RAM\n" |
8cc66334 EW |
664 | " avrxmega3 - XMEGA, > 8K, <= 64K FLASH, > 64K RAM\n" |
665 | " avrxmega4 - XMEGA, > 64K, <= 128K FLASH, <= 64K RAM\n" | |
666 | " avrxmega5 - XMEGA, > 64K, <= 128K FLASH, > 64K RAM\n" | |
667 | " avrxmega6 - XMEGA, > 128K, <= 256K FLASH, <= 64K RAM\n" | |
668 | " avrxmega7 - XMEGA, > 128K, <= 256K FLASH, > 64K RAM\n" | |
f36e8886 | 669 | " avrtiny - AVR Tiny core with 16 gp registers\n")); |
00d2865b NC |
670 | fprintf (stream, |
671 | _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n" | |
672 | " -mno-skip-bug disable warnings for skipping two-word instructions\n" | |
673 | " (default for avr4, avr5)\n" | |
674 | " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n" | |
af910977 DC |
675 | " (default for avr3, avr5)\n" |
676 | " -mrmw accept Read-Modify-Write instructions\n" | |
edc9e9a6 AB |
677 | " -mlink-relax generate relocations for linker relaxation (default)\n" |
678 | " -mno-link-relax don't generate relocations for linker relaxation.\n" | |
32f76c67 | 679 | " -mgcc-isr accept the __gcc_isr pseudo-instruction.\n" |
edc9e9a6 | 680 | )); |
00d2865b | 681 | show_mcu_list (stream); |
adde6300 AM |
682 | } |
683 | ||
684 | static void | |
dc191a8f | 685 | avr_set_arch (int dummy ATTRIBUTE_UNUSED) |
adde6300 | 686 | { |
dc191a8f | 687 | char str[20]; |
1dab94dd | 688 | |
adde6300 | 689 | input_line_pointer = extract_word (input_line_pointer, str, 20); |
00d2865b | 690 | md_parse_option (OPTION_MMCU, str); |
adde6300 AM |
691 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
692 | } | |
693 | ||
694 | int | |
17b9d67d | 695 | md_parse_option (int c, const char *arg) |
adde6300 | 696 | { |
00d2865b | 697 | switch (c) |
adde6300 | 698 | { |
00d2865b NC |
699 | case OPTION_MMCU: |
700 | { | |
701 | int i; | |
00d2865b NC |
702 | |
703 | for (i = 0; mcu_types[i].name; ++i) | |
f73e41ef | 704 | if (strcasecmp (mcu_types[i].name, arg) == 0) |
00d2865b | 705 | break; |
adde6300 | 706 | |
00d2865b NC |
707 | if (!mcu_types[i].name) |
708 | { | |
709 | show_mcu_list (stderr); | |
710 | as_fatal (_("unknown MCU: %s\n"), arg); | |
711 | } | |
65aa24b6 | 712 | |
00d2865b NC |
713 | /* It is OK to redefine mcu type within the same avr[1-5] bfd machine |
714 | type - this for allows passing -mmcu=... via gcc ASM_SPEC as well | |
715 | as .arch ... in the asm output at the same time. */ | |
00d2865b | 716 | if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach) |
e1fa0163 NC |
717 | { |
718 | specified_mcu.name = mcu_types[i].name; | |
719 | specified_mcu.isa |= mcu_types[i].isa; | |
720 | specified_mcu.mach = mcu_types[i].mach; | |
721 | avr_mcu = &specified_mcu; | |
722 | } | |
00d2865b NC |
723 | else |
724 | as_fatal (_("redefinition of mcu type `%s' to `%s'"), | |
725 | avr_mcu->name, mcu_types[i].name); | |
726 | return 1; | |
727 | } | |
728 | case OPTION_ALL_OPCODES: | |
729 | avr_opt.all_opcodes = 1; | |
730 | return 1; | |
731 | case OPTION_NO_SKIP_BUG: | |
732 | avr_opt.no_skip_bug = 1; | |
733 | return 1; | |
734 | case OPTION_NO_WRAP: | |
735 | avr_opt.no_wrap = 1; | |
adde6300 | 736 | return 1; |
af910977 DC |
737 | case OPTION_ISA_RMW: |
738 | specified_mcu.isa |= AVR_ISA_RMW; | |
739 | return 1; | |
e4ef1b6c | 740 | case OPTION_LINK_RELAX: |
edc9e9a6 AB |
741 | avr_opt.no_link_relax = 0; |
742 | return 1; | |
743 | case OPTION_NO_LINK_RELAX: | |
744 | avr_opt.no_link_relax = 1; | |
e4ef1b6c | 745 | return 1; |
32f76c67 GJL |
746 | case OPTION_HAVE_GCCISR: |
747 | avr_opt.have_gccisr = 1; | |
748 | return 1; | |
adde6300 | 749 | } |
1dab94dd | 750 | |
adde6300 AM |
751 | return 0; |
752 | } | |
753 | ||
32f76c67 GJL |
754 | |
755 | /* Implement `md_undefined_symbol' */ | |
756 | /* If we are in `__gcc_isr' chunk, pop up `__gcc_isr.n_pushed.<NUM>' | |
757 | instead of `__gcc_isr.n_pushed'. This will be resolved by the Done | |
758 | chunk in `avr_patch_gccisr_frag' to the number of PUSHes produced by | |
759 | the Prologue chunk. */ | |
760 | ||
adde6300 | 761 | symbolS * |
32f76c67 | 762 | avr_undefined_symbol (char *name) |
adde6300 | 763 | { |
32f76c67 GJL |
764 | if (ISR_CHUNK_Done != avr_isr.prev_chunk |
765 | && 0 == strcmp (name, "__gcc_isr.n_pushed")) | |
766 | { | |
767 | if (!avr_isr.sym_n_pushed) | |
768 | { | |
769 | static unsigned suffix; | |
770 | char xname[30]; | |
771 | sprintf (xname, "%s.%03u", name, (++suffix) % 1000); | |
772 | avr_isr.sym_n_pushed = symbol_new (xname, undefined_section, | |
773 | (valueT) 0, &zero_address_frag); | |
774 | } | |
775 | return avr_isr.sym_n_pushed; | |
776 | } | |
777 | ||
dc191a8f | 778 | return NULL; |
adde6300 AM |
779 | } |
780 | ||
6d4af3c2 | 781 | const char * |
dc191a8f | 782 | md_atof (int type, char *litP, int *sizeP) |
adde6300 | 783 | { |
499ac353 | 784 | return ieee_md_atof (type, litP, sizeP, FALSE); |
adde6300 AM |
785 | } |
786 | ||
787 | void | |
dc191a8f NC |
788 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
789 | asection *sec ATTRIBUTE_UNUSED, | |
790 | fragS *fragP ATTRIBUTE_UNUSED) | |
adde6300 AM |
791 | { |
792 | abort (); | |
793 | } | |
794 | ||
adde6300 | 795 | void |
dc191a8f | 796 | md_begin (void) |
adde6300 | 797 | { |
df136245 | 798 | unsigned int i; |
adde6300 | 799 | struct avr_opcodes_s *opcode; |
dc191a8f | 800 | |
c6a7ab1f | 801 | avr_hash = hash_new (); |
adde6300 AM |
802 | |
803 | /* Insert unique names into hash table. This hash table then provides a | |
804 | quick index to the first opcode with a particular name in the opcode | |
805 | table. */ | |
adde6300 AM |
806 | for (opcode = avr_opcodes; opcode->name; opcode++) |
807 | hash_insert (avr_hash, opcode->name, (char *) opcode); | |
808 | ||
809 | avr_mod_hash = hash_new (); | |
810 | ||
dc191a8f | 811 | for (i = 0; i < ARRAY_SIZE (exp_mod); ++i) |
8ad7c533 NC |
812 | { |
813 | mod_index m; | |
814 | ||
815 | m.index = i + 10; | |
816 | hash_insert (avr_mod_hash, EXP_MOD_NAME (i), m.ptr); | |
817 | } | |
c6a7ab1f | 818 | |
32f76c67 GJL |
819 | avr_no_sreg_hash = hash_new (); |
820 | ||
821 | for (i = 0; i < ARRAY_SIZE (avr_no_sreg); ++i) | |
822 | { | |
823 | gas_assert (hash_find (avr_hash, avr_no_sreg[i])); | |
824 | hash_insert (avr_no_sreg_hash, avr_no_sreg[i], (char*) 4 /* dummy */); | |
825 | } | |
826 | ||
827 | avr_gccisr_opcode = (struct avr_opcodes_s*) hash_find (avr_hash, "__gcc_isr"); | |
828 | gas_assert (avr_gccisr_opcode); | |
829 | ||
adde6300 | 830 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach); |
edc9e9a6 | 831 | linkrelax = !avr_opt.no_link_relax; |
adde6300 AM |
832 | } |
833 | ||
df136245 | 834 | /* Resolve STR as a constant expression and return the result. |
c6a7ab1f | 835 | If result greater than MAX then error. */ |
df136245 DC |
836 | |
837 | static unsigned int | |
dc191a8f | 838 | avr_get_constant (char *str, int max) |
df136245 DC |
839 | { |
840 | expressionS ex; | |
dc191a8f | 841 | |
df136245 DC |
842 | str = skip_space (str); |
843 | input_line_pointer = str; | |
dc191a8f | 844 | expression (& ex); |
df136245 DC |
845 | |
846 | if (ex.X_op != O_constant) | |
847 | as_bad (_("constant value required")); | |
848 | ||
849 | if (ex.X_add_number > max || ex.X_add_number < 0) | |
73f4d86e | 850 | as_bad (_("number must be positive and less than %d"), max + 1); |
1dab94dd | 851 | |
df136245 DC |
852 | return ex.X_add_number; |
853 | } | |
854 | ||
dc191a8f | 855 | /* Parse for ldd/std offset. */ |
df136245 | 856 | |
dc191a8f NC |
857 | static void |
858 | avr_offset_expression (expressionS *exp) | |
adde6300 | 859 | { |
dc191a8f NC |
860 | char *str = input_line_pointer; |
861 | char *tmp; | |
862 | char op[8]; | |
adde6300 | 863 | |
dc191a8f NC |
864 | tmp = str; |
865 | str = extract_word (str, op, sizeof (op)); | |
866 | ||
867 | input_line_pointer = tmp; | |
868 | expression (exp); | |
869 | ||
870 | /* Warn about expressions that fail to use lo8 (). */ | |
871 | if (exp->X_op == O_constant) | |
adde6300 | 872 | { |
dc191a8f | 873 | int x = exp->X_add_number; |
28c9d252 | 874 | |
dc191a8f NC |
875 | if (x < -255 || x > 255) |
876 | as_warn (_("constant out of 8-bit range: %d"), x); | |
877 | } | |
878 | } | |
adde6300 | 879 | |
dc191a8f | 880 | /* Parse ordinary expression. */ |
adde6300 | 881 | |
dc191a8f NC |
882 | static char * |
883 | parse_exp (char *s, expressionS *op) | |
884 | { | |
885 | input_line_pointer = s; | |
886 | expression (op); | |
887 | if (op->X_op == O_absent) | |
888 | as_bad (_("missing operand")); | |
889 | return input_line_pointer; | |
890 | } | |
1dab94dd | 891 | |
dc191a8f NC |
892 | /* Parse special expressions (needed for LDI command): |
893 | xx8 (address) | |
894 | xx8 (-address) | |
895 | pm_xx8 (address) | |
896 | pm_xx8 (-address) | |
897 | where xx is: hh, hi, lo. */ | |
adde6300 | 898 | |
dc191a8f NC |
899 | static bfd_reloc_code_real_type |
900 | avr_ldi_expression (expressionS *exp) | |
901 | { | |
902 | char *str = input_line_pointer; | |
903 | char *tmp; | |
904 | char op[8]; | |
905 | int mod; | |
28c9d252 NC |
906 | int linker_stubs_should_be_generated = 0; |
907 | ||
dc191a8f | 908 | tmp = str; |
adde6300 | 909 | |
dc191a8f | 910 | str = extract_word (str, op, sizeof (op)); |
adde6300 | 911 | |
dc191a8f NC |
912 | if (op[0]) |
913 | { | |
8ad7c533 | 914 | mod_index m; |
28c9d252 | 915 | |
8ad7c533 NC |
916 | m.ptr = hash_find (avr_mod_hash, op); |
917 | mod = m.index; | |
1dab94dd | 918 | |
dc191a8f NC |
919 | if (mod) |
920 | { | |
921 | int closes = 0; | |
b170af93 | 922 | |
dc191a8f NC |
923 | mod -= 10; |
924 | str = skip_space (str); | |
00d2865b | 925 | |
dc191a8f NC |
926 | if (*str == '(') |
927 | { | |
28c9d252 | 928 | bfd_reloc_code_real_type reloc_to_return; |
dc191a8f | 929 | int neg_p = 0; |
00d2865b | 930 | |
dc191a8f | 931 | ++str; |
00d2865b | 932 | |
dc191a8f | 933 | if (strncmp ("pm(", str, 3) == 0 |
28c9d252 NC |
934 | || strncmp ("gs(",str,3) == 0 |
935 | || strncmp ("-(gs(",str,5) == 0 | |
dc191a8f NC |
936 | || strncmp ("-(pm(", str, 5) == 0) |
937 | { | |
938 | if (HAVE_PM_P (mod)) | |
939 | { | |
940 | ++mod; | |
941 | ++closes; | |
942 | } | |
943 | else | |
944 | as_bad (_("illegal expression")); | |
b170af93 | 945 | |
28c9d252 NC |
946 | if (str[0] == 'g' || str[2] == 'g') |
947 | linker_stubs_should_be_generated = 1; | |
948 | ||
dc191a8f NC |
949 | if (*str == '-') |
950 | { | |
951 | neg_p = 1; | |
952 | ++closes; | |
953 | str += 5; | |
954 | } | |
955 | else | |
956 | str += 3; | |
957 | } | |
adde6300 | 958 | |
dc191a8f NC |
959 | if (*str == '-' && *(str + 1) == '(') |
960 | { | |
961 | neg_p ^= 1; | |
962 | ++closes; | |
963 | str += 2; | |
964 | } | |
750bce0e | 965 | |
dc191a8f NC |
966 | input_line_pointer = str; |
967 | expression (exp); | |
750bce0e | 968 | |
dc191a8f NC |
969 | do |
970 | { | |
971 | if (*input_line_pointer != ')') | |
972 | { | |
973 | as_bad (_("`)' required")); | |
974 | break; | |
975 | } | |
976 | input_line_pointer++; | |
977 | } | |
978 | while (closes--); | |
979 | ||
28c9d252 NC |
980 | reloc_to_return = |
981 | neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod); | |
982 | if (linker_stubs_should_be_generated) | |
983 | { | |
984 | switch (reloc_to_return) | |
985 | { | |
986 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
987 | reloc_to_return = BFD_RELOC_AVR_LO8_LDI_GS; | |
988 | break; | |
989 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
990 | reloc_to_return = BFD_RELOC_AVR_HI8_LDI_GS; | |
991 | break; | |
992 | ||
993 | default: | |
0a903bab NC |
994 | /* PR 5523: Do not generate a warning here, |
995 | legitimate code can trigger this case. */ | |
996 | break; | |
28c9d252 NC |
997 | } |
998 | } | |
999 | return reloc_to_return; | |
dc191a8f NC |
1000 | } |
1001 | } | |
1002 | } | |
750bce0e NC |
1003 | |
1004 | input_line_pointer = tmp; | |
1005 | expression (exp); | |
1006 | ||
1007 | /* Warn about expressions that fail to use lo8 (). */ | |
1008 | if (exp->X_op == O_constant) | |
1009 | { | |
1010 | int x = exp->X_add_number; | |
dc191a8f | 1011 | |
750bce0e NC |
1012 | if (x < -255 || x > 255) |
1013 | as_warn (_("constant out of 8-bit range: %d"), x); | |
1014 | } | |
dc191a8f NC |
1015 | |
1016 | return BFD_RELOC_AVR_LDI; | |
750bce0e NC |
1017 | } |
1018 | ||
df136245 | 1019 | /* Parse one instruction operand. |
c6a7ab1f NC |
1020 | Return operand bitmask. Also fixups can be generated. */ |
1021 | ||
adde6300 | 1022 | static unsigned int |
dc191a8f NC |
1023 | avr_operand (struct avr_opcodes_s *opcode, |
1024 | int where, | |
e0471c16 | 1025 | const char *op, |
32f76c67 GJL |
1026 | char **line, |
1027 | int *pregno) | |
adde6300 | 1028 | { |
adde6300 | 1029 | expressionS op_expr; |
df136245 DC |
1030 | unsigned int op_mask = 0; |
1031 | char *str = skip_space (*line); | |
adde6300 | 1032 | |
adde6300 AM |
1033 | switch (*op) |
1034 | { | |
1035 | /* Any register operand. */ | |
1036 | case 'w': | |
1037 | case 'd': | |
1038 | case 'r': | |
b170af93 DC |
1039 | case 'a': |
1040 | case 'v': | |
75f58085 BS |
1041 | { |
1042 | char * old_str = str; | |
1043 | char *lower; | |
1044 | char r_name[20]; | |
1dab94dd | 1045 | |
75f58085 BS |
1046 | str = extract_word (str, r_name, sizeof (r_name)); |
1047 | for (lower = r_name; *lower; ++lower) | |
1048 | { | |
1049 | if (*lower >= 'A' && *lower <= 'Z') | |
1050 | *lower += 'a' - 'A'; | |
1051 | } | |
1052 | ||
1053 | if (r_name[0] == 'r' && ISDIGIT (r_name[1]) && r_name[2] == 0) | |
1054 | /* Single-digit register number, ie r0-r9. */ | |
1055 | op_mask = r_name[1] - '0'; | |
1056 | else if (r_name[0] == 'r' && ISDIGIT (r_name[1]) | |
1057 | && ISDIGIT (r_name[2]) && r_name[3] == 0) | |
1058 | /* Double-digit register number, ie r10 - r32. */ | |
1059 | op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0'; | |
1060 | else if (r_name[0] >= 'x' && r_name[0] <= 'z' | |
1061 | && (r_name[1] == 'l' || r_name[1] == 'h') && r_name[2] == 0) | |
1062 | /* Registers r26-r31 referred to by name, ie xl, xh, yl, yh, zl, zh. */ | |
1063 | op_mask = (r_name[0] - 'x') * 2 + (r_name[1] == 'h') + 26; | |
1064 | else if ((*op == 'v' || *op == 'w') | |
1065 | && r_name[0] >= 'x' && r_name[0] <= 'z' && r_name[1] == 0) | |
1066 | /* For the movw and addiw instructions, refer to registers x, y and z by name. */ | |
1067 | op_mask = (r_name[0] - 'x') * 2 + 26; | |
1068 | else | |
1069 | { | |
1070 | /* Numeric or symbolic constant register number. */ | |
1071 | op_mask = avr_get_constant (old_str, 31); | |
1072 | str = input_line_pointer; | |
1073 | } | |
1074 | } | |
f36e8886 | 1075 | |
32f76c67 GJL |
1076 | if (pregno) |
1077 | *pregno = op_mask; | |
1078 | ||
f36e8886 BS |
1079 | if (avr_mcu->mach == bfd_mach_avrtiny) |
1080 | { | |
1081 | if (op_mask < 16 || op_mask > 31) | |
1082 | { | |
1083 | as_bad (_("register name or number from 16 to 31 required")); | |
1084 | break; | |
1085 | } | |
1086 | } | |
1087 | else if (op_mask > 31) | |
1088 | { | |
1089 | as_bad (_("register name or number from 0 to 31 required")); | |
1090 | break; | |
1091 | } | |
1dab94dd | 1092 | |
c6a7ab1f NC |
1093 | switch (*op) |
1094 | { | |
1095 | case 'a': | |
1096 | if (op_mask < 16 || op_mask > 23) | |
1097 | as_bad (_("register r16-r23 required")); | |
1098 | op_mask -= 16; | |
1099 | break; | |
1dab94dd | 1100 | |
c6a7ab1f NC |
1101 | case 'd': |
1102 | if (op_mask < 16) | |
1103 | as_bad (_("register number above 15 required")); | |
1104 | op_mask -= 16; | |
1105 | break; | |
1dab94dd | 1106 | |
c6a7ab1f NC |
1107 | case 'v': |
1108 | if (op_mask & 1) | |
1109 | as_bad (_("even register number required")); | |
1110 | op_mask >>= 1; | |
1111 | break; | |
1dab94dd | 1112 | |
c6a7ab1f | 1113 | case 'w': |
65b1d096 | 1114 | if ((op_mask & 1) || op_mask < 24) |
c6a7ab1f | 1115 | as_bad (_("register r24, r26, r28 or r30 required")); |
65b1d096 | 1116 | op_mask = (op_mask - 24) >> 1; |
c6a7ab1f NC |
1117 | break; |
1118 | } | |
1119 | break; | |
adde6300 AM |
1120 | |
1121 | case 'e': | |
1122 | { | |
1123 | char c; | |
1dab94dd | 1124 | |
adde6300 AM |
1125 | if (*str == '-') |
1126 | { | |
c6a7ab1f | 1127 | str = skip_space (str + 1); |
adde6300 AM |
1128 | op_mask = 0x1002; |
1129 | } | |
3882b010 | 1130 | c = TOLOWER (*str); |
adde6300 AM |
1131 | if (c == 'x') |
1132 | op_mask |= 0x100c; | |
1133 | else if (c == 'y') | |
1134 | op_mask |= 0x8; | |
1135 | else if (c != 'z') | |
00d2865b | 1136 | as_bad (_("pointer register (X, Y or Z) required")); |
adde6300 | 1137 | |
c6a7ab1f | 1138 | str = skip_space (str + 1); |
adde6300 AM |
1139 | if (*str == '+') |
1140 | { | |
1141 | ++str; | |
1142 | if (op_mask & 2) | |
00d2865b | 1143 | as_bad (_("cannot both predecrement and postincrement")); |
adde6300 AM |
1144 | op_mask |= 0x1001; |
1145 | } | |
e38c9cc2 | 1146 | |
1188e082 | 1147 | /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer |
e38c9cc2 | 1148 | registers, no predecrement, no postincrement. */ |
00d2865b NC |
1149 | if (!avr_opt.all_opcodes && (op_mask & 0x100F) |
1150 | && !(avr_mcu->isa & AVR_ISA_SRAM)) | |
1151 | as_bad (_("addressing mode not supported")); | |
adde6300 AM |
1152 | } |
1153 | break; | |
1154 | ||
b170af93 | 1155 | case 'z': |
c6a7ab1f NC |
1156 | if (*str == '-') |
1157 | as_bad (_("can't predecrement")); | |
1dab94dd | 1158 | |
c6a7ab1f NC |
1159 | if (! (*str == 'z' || *str == 'Z')) |
1160 | as_bad (_("pointer register Z required")); | |
1dab94dd | 1161 | |
c6a7ab1f NC |
1162 | str = skip_space (str + 1); |
1163 | ||
1164 | if (*str == '+') | |
1165 | { | |
1166 | ++str; | |
e0471c16 | 1167 | const char *s; |
8cc66334 EW |
1168 | for (s = opcode->opcode; *s; ++s) |
1169 | { | |
1170 | if (*s == '+') | |
1171 | op_mask |= (1 << (15 - (s - opcode->opcode))); | |
1172 | } | |
c6a7ab1f | 1173 | } |
d669d37f NC |
1174 | |
1175 | /* attiny26 can do "lpm" and "lpm r,Z" but not "lpm r,Z+". */ | |
1176 | if (!avr_opt.all_opcodes | |
1177 | && (op_mask & 0x0001) | |
1178 | && !(avr_mcu->isa & AVR_ISA_MOVW)) | |
1179 | as_bad (_("postincrement not supported")); | |
b170af93 DC |
1180 | break; |
1181 | ||
adde6300 AM |
1182 | case 'b': |
1183 | { | |
3882b010 | 1184 | char c = TOLOWER (*str++); |
1dab94dd | 1185 | |
adde6300 AM |
1186 | if (c == 'y') |
1187 | op_mask |= 0x8; | |
1188 | else if (c != 'z') | |
00d2865b | 1189 | as_bad (_("pointer register (Y or Z) required")); |
adde6300 AM |
1190 | str = skip_space (str); |
1191 | if (*str++ == '+') | |
1192 | { | |
750bce0e NC |
1193 | input_line_pointer = str; |
1194 | avr_offset_expression (& op_expr); | |
adde6300 | 1195 | str = input_line_pointer; |
750bce0e NC |
1196 | fix_new_exp (frag_now, where, 3, |
1197 | &op_expr, FALSE, BFD_RELOC_AVR_6); | |
adde6300 AM |
1198 | } |
1199 | } | |
1200 | break; | |
1201 | ||
1202 | case 'h': | |
c6a7ab1f NC |
1203 | str = parse_exp (str, &op_expr); |
1204 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 1205 | &op_expr, FALSE, BFD_RELOC_AVR_CALL); |
adde6300 AM |
1206 | break; |
1207 | ||
1208 | case 'L': | |
c6a7ab1f NC |
1209 | str = parse_exp (str, &op_expr); |
1210 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 1211 | &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL); |
adde6300 AM |
1212 | break; |
1213 | ||
1214 | case 'l': | |
c6a7ab1f NC |
1215 | str = parse_exp (str, &op_expr); |
1216 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
b34976b6 | 1217 | &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL); |
adde6300 AM |
1218 | break; |
1219 | ||
1220 | case 'i': | |
c6a7ab1f NC |
1221 | str = parse_exp (str, &op_expr); |
1222 | fix_new_exp (frag_now, where + 2, opcode->insn_size * 2, | |
b34976b6 | 1223 | &op_expr, FALSE, BFD_RELOC_16); |
adde6300 AM |
1224 | break; |
1225 | ||
f36e8886 BS |
1226 | case 'j': |
1227 | str = parse_exp (str, &op_expr); | |
1228 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
1229 | &op_expr, FALSE, BFD_RELOC_AVR_LDS_STS_16); | |
1230 | break; | |
1231 | ||
adde6300 AM |
1232 | case 'M': |
1233 | { | |
1234 | bfd_reloc_code_real_type r_type; | |
1dab94dd | 1235 | |
c6a7ab1f NC |
1236 | input_line_pointer = str; |
1237 | r_type = avr_ldi_expression (&op_expr); | |
1238 | str = input_line_pointer; | |
adde6300 | 1239 | fix_new_exp (frag_now, where, 3, |
b34976b6 | 1240 | &op_expr, FALSE, r_type); |
adde6300 AM |
1241 | } |
1242 | break; | |
1243 | ||
1244 | case 'n': | |
1245 | { | |
1246 | unsigned int x; | |
1dab94dd | 1247 | |
adde6300 AM |
1248 | x = ~avr_get_constant (str, 255); |
1249 | str = input_line_pointer; | |
1250 | op_mask |= (x & 0xf) | ((x << 4) & 0xf00); | |
1251 | } | |
1252 | break; | |
1253 | ||
32f76c67 GJL |
1254 | case 'N': |
1255 | { | |
1256 | unsigned int x; | |
1257 | ||
1258 | x = avr_get_constant (str, 255); | |
1259 | str = input_line_pointer; | |
1260 | op_mask = x; | |
1261 | } | |
1262 | break; | |
1263 | ||
adde6300 | 1264 | case 'K': |
750bce0e NC |
1265 | input_line_pointer = str; |
1266 | avr_offset_expression (& op_expr); | |
1267 | str = input_line_pointer; | |
1268 | fix_new_exp (frag_now, where, 3, | |
1269 | & op_expr, FALSE, BFD_RELOC_AVR_6_ADIW); | |
adde6300 AM |
1270 | break; |
1271 | ||
1272 | case 'S': | |
1273 | case 's': | |
1274 | { | |
1275 | unsigned int x; | |
1dab94dd | 1276 | |
adde6300 AM |
1277 | x = avr_get_constant (str, 7); |
1278 | str = input_line_pointer; | |
1279 | if (*op == 'S') | |
1280 | x <<= 4; | |
1281 | op_mask |= x; | |
1282 | } | |
1283 | break; | |
1284 | ||
1285 | case 'P': | |
75f58085 BS |
1286 | str = parse_exp (str, &op_expr); |
1287 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
1288 | &op_expr, FALSE, BFD_RELOC_AVR_PORT6); | |
adde6300 AM |
1289 | break; |
1290 | ||
1291 | case 'p': | |
75f58085 BS |
1292 | str = parse_exp (str, &op_expr); |
1293 | fix_new_exp (frag_now, where, opcode->insn_size * 2, | |
1294 | &op_expr, FALSE, BFD_RELOC_AVR_PORT5); | |
adde6300 | 1295 | break; |
1dab94dd | 1296 | |
8cc66334 EW |
1297 | case 'E': |
1298 | { | |
1299 | unsigned int x; | |
1300 | ||
1301 | x = avr_get_constant (str, 15); | |
1302 | str = input_line_pointer; | |
1303 | op_mask |= (x << 4); | |
1304 | } | |
1305 | break; | |
99700d6f | 1306 | |
1188e082 DC |
1307 | case '?': |
1308 | break; | |
1dab94dd | 1309 | |
adde6300 | 1310 | default: |
00d2865b | 1311 | as_bad (_("unknown constraint `%c'"), *op); |
adde6300 | 1312 | } |
1dab94dd | 1313 | |
adde6300 AM |
1314 | *line = str; |
1315 | return op_mask; | |
1316 | } | |
1317 | ||
dc191a8f NC |
1318 | /* Parse instruction operands. |
1319 | Return binary opcode. */ | |
1320 | ||
1321 | static unsigned int | |
1322 | avr_operands (struct avr_opcodes_s *opcode, char **line) | |
1323 | { | |
e0471c16 | 1324 | const char *op = opcode->constraints; |
dc191a8f NC |
1325 | unsigned int bin = opcode->bin_opcode; |
1326 | char *frag = frag_more (opcode->insn_size * 2); | |
1327 | char *str = *line; | |
1328 | int where = frag - frag_now->fr_literal; | |
1329 | static unsigned int prev = 0; /* Previous opcode. */ | |
32f76c67 GJL |
1330 | int regno1 = -2; |
1331 | int regno2 = -2; | |
dc191a8f NC |
1332 | |
1333 | /* Opcode have operands. */ | |
1334 | if (*op) | |
1335 | { | |
1336 | unsigned int reg1 = 0; | |
1337 | unsigned int reg2 = 0; | |
1338 | int reg1_present = 0; | |
1339 | int reg2_present = 0; | |
1340 | ||
1341 | /* Parse first operand. */ | |
1342 | if (REGISTER_P (*op)) | |
1343 | reg1_present = 1; | |
32f76c67 | 1344 | reg1 = avr_operand (opcode, where, op, &str, ®no1); |
dc191a8f NC |
1345 | ++op; |
1346 | ||
1347 | /* Parse second operand. */ | |
1348 | if (*op) | |
1349 | { | |
1350 | if (*op == ',') | |
1351 | ++op; | |
1352 | ||
1353 | if (*op == '=') | |
1354 | { | |
1355 | reg2 = reg1; | |
1356 | reg2_present = 1; | |
32f76c67 | 1357 | regno2 = regno1; |
dc191a8f NC |
1358 | } |
1359 | else | |
1360 | { | |
1361 | if (REGISTER_P (*op)) | |
1362 | reg2_present = 1; | |
1363 | ||
1364 | str = skip_space (str); | |
1365 | if (*str++ != ',') | |
1366 | as_bad (_("`,' required")); | |
1367 | str = skip_space (str); | |
1368 | ||
32f76c67 | 1369 | reg2 = avr_operand (opcode, where, op, &str, ®no2); |
dc191a8f NC |
1370 | } |
1371 | ||
1372 | if (reg1_present && reg2_present) | |
1373 | reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200); | |
1374 | else if (reg2_present) | |
1375 | reg2 <<= 4; | |
1376 | } | |
1377 | if (reg1_present) | |
1378 | reg1 <<= 4; | |
1379 | bin |= reg1 | reg2; | |
1380 | } | |
1381 | ||
32f76c67 GJL |
1382 | if (avr_opt.have_gccisr) |
1383 | avr_update_gccisr (opcode, regno1, regno2); | |
1384 | ||
dc191a8f NC |
1385 | /* Detect undefined combinations (like ld r31,Z+). */ |
1386 | if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin)) | |
1387 | as_warn (_("undefined combination of operands")); | |
1388 | ||
1389 | if (opcode->insn_size == 2) | |
1390 | { | |
1391 | /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs | |
1392 | (AVR core bug, fixed in the newer devices). */ | |
1393 | if (!(avr_opt.no_skip_bug || | |
1394 | (avr_mcu->isa & (AVR_ISA_MUL | AVR_ISA_MOVW))) | |
1395 | && AVR_SKIP_P (prev)) | |
1396 | as_warn (_("skipping two-word instruction")); | |
1397 | ||
1398 | bfd_putl32 ((bfd_vma) bin, frag); | |
1399 | } | |
1400 | else | |
1401 | bfd_putl16 ((bfd_vma) bin, frag); | |
1402 | ||
1403 | prev = bin; | |
1404 | *line = str; | |
1405 | return bin; | |
1406 | } | |
1407 | ||
adde6300 AM |
1408 | /* GAS will call this function for each section at the end of the assembly, |
1409 | to permit the CPU backend to adjust the alignment of a section. */ | |
c6a7ab1f | 1410 | |
adde6300 | 1411 | valueT |
dc191a8f | 1412 | md_section_align (asection *seg, valueT addr) |
adde6300 AM |
1413 | { |
1414 | int align = bfd_get_section_alignment (stdoutput, seg); | |
dce55a03 | 1415 | return ((addr + (1 << align) - 1) & (-1UL << align)); |
adde6300 AM |
1416 | } |
1417 | ||
1418 | /* If you define this macro, it should return the offset between the | |
1419 | address of a PC relative fixup and the position from which the PC | |
1420 | relative adjustment should be made. On many processors, the base | |
1421 | of a PC relative instruction is the next instruction, so this | |
1422 | macro would return the length of an instruction. */ | |
c6a7ab1f | 1423 | |
adde6300 | 1424 | long |
dc191a8f | 1425 | md_pcrel_from_section (fixS *fixp, segT sec) |
adde6300 | 1426 | { |
c6a7ab1f | 1427 | if (fixp->fx_addsy != (symbolS *) NULL |
adde6300 AM |
1428 | && (!S_IS_DEFINED (fixp->fx_addsy) |
1429 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
1430 | return 0; | |
1dab94dd | 1431 | |
adde6300 AM |
1432 | return fixp->fx_frag->fr_address + fixp->fx_where; |
1433 | } | |
1434 | ||
e4ef1b6c DC |
1435 | static bfd_boolean |
1436 | relaxable_section (asection *sec) | |
1437 | { | |
edc9e9a6 AB |
1438 | return ((sec->flags & SEC_DEBUGGING) == 0 |
1439 | && (sec->flags & SEC_CODE) != 0 | |
1440 | && (sec->flags & SEC_ALLOC) != 0); | |
e4ef1b6c DC |
1441 | } |
1442 | ||
75f58085 | 1443 | /* Does whatever the xtensa port does. */ |
e4ef1b6c DC |
1444 | int |
1445 | avr_validate_fix_sub (fixS *fix) | |
1446 | { | |
1447 | segT add_symbol_segment, sub_symbol_segment; | |
1448 | ||
1449 | /* The difference of two symbols should be resolved by the assembler when | |
1450 | linkrelax is not set. If the linker may relax the section containing | |
1451 | the symbols, then an Xtensa DIFF relocation must be generated so that | |
1452 | the linker knows to adjust the difference value. */ | |
1453 | if (!linkrelax || fix->fx_addsy == NULL) | |
1454 | return 0; | |
1455 | ||
1456 | /* Make sure both symbols are in the same segment, and that segment is | |
1457 | "normal" and relaxable. If the segment is not "normal", then the | |
1458 | fix is not valid. If the segment is not "relaxable", then the fix | |
1459 | should have been handled earlier. */ | |
1460 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); | |
1461 | if (! SEG_NORMAL (add_symbol_segment) || | |
1462 | ! relaxable_section (add_symbol_segment)) | |
1463 | return 0; | |
1464 | ||
1465 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); | |
1466 | return (sub_symbol_segment == add_symbol_segment); | |
1467 | } | |
1468 | ||
1469 | /* TC_FORCE_RELOCATION hook */ | |
1470 | ||
1471 | /* If linkrelax is turned on, and the symbol to relocate | |
1472 | against is in a relaxable segment, don't compute the value - | |
75f58085 | 1473 | generate a relocation instead. */ |
e4ef1b6c DC |
1474 | int |
1475 | avr_force_relocation (fixS *fix) | |
1476 | { | |
1477 | if (linkrelax && fix->fx_addsy | |
1478 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) | |
1479 | return 1; | |
1480 | ||
1481 | return generic_force_reloc (fix); | |
1482 | } | |
1483 | ||
adde6300 | 1484 | /* GAS will call this for each fixup. It should store the correct |
c6a7ab1f NC |
1485 | value in the object file. */ |
1486 | ||
94f592af | 1487 | void |
dc191a8f | 1488 | md_apply_fix (fixS *fixP, valueT * valP, segT seg) |
adde6300 AM |
1489 | { |
1490 | unsigned char *where; | |
1491 | unsigned long insn; | |
a161fe53 | 1492 | long value = *valP; |
adde6300 | 1493 | |
94f592af NC |
1494 | if (fixP->fx_addsy == (symbolS *) NULL) |
1495 | fixP->fx_done = 1; | |
1496 | ||
87733541 AM |
1497 | else if (fixP->fx_pcrel) |
1498 | { | |
1499 | segT s = S_GET_SEGMENT (fixP->fx_addsy); | |
1500 | ||
1501 | if (s == seg || s == absolute_section) | |
1502 | { | |
1503 | value += S_GET_VALUE (fixP->fx_addsy); | |
1504 | fixP->fx_done = 1; | |
1505 | } | |
1506 | } | |
e4ef1b6c DC |
1507 | else if (linkrelax && fixP->fx_subsy) |
1508 | { | |
1509 | /* For a subtraction relocation expression, generate one | |
1510 | of the DIFF relocs, with the value being the difference. | |
1511 | Note that a sym1 - sym2 expression is adjusted into a | |
1512 | section_start_sym + sym4_offset_from_section_start - sym1 | |
1513 | expression. fixP->fx_addsy holds the section start symbol, | |
1514 | fixP->fx_offset holds sym2's offset, and fixP->fx_subsy | |
1515 | holds sym1. Calculate the current difference and write value, | |
75f58085 BS |
1516 | but leave fx_offset as is - during relaxation, |
1517 | fx_offset - value gives sym1's value. */ | |
e4ef1b6c DC |
1518 | |
1519 | switch (fixP->fx_r_type) | |
1520 | { | |
1521 | case BFD_RELOC_8: | |
1522 | fixP->fx_r_type = BFD_RELOC_AVR_DIFF8; | |
1523 | break; | |
1524 | case BFD_RELOC_16: | |
1525 | fixP->fx_r_type = BFD_RELOC_AVR_DIFF16; | |
1526 | break; | |
1527 | case BFD_RELOC_32: | |
1528 | fixP->fx_r_type = BFD_RELOC_AVR_DIFF32; | |
1529 | break; | |
1530 | default: | |
1531 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
1532 | break; | |
1533 | } | |
1534 | ||
1535 | value = S_GET_VALUE (fixP->fx_addsy) + | |
1536 | fixP->fx_offset - S_GET_VALUE (fixP->fx_subsy); | |
491793b5 | 1537 | *valP = value; |
e4ef1b6c DC |
1538 | |
1539 | fixP->fx_subsy = NULL; | |
1540 | } | |
a161fe53 AM |
1541 | /* We don't actually support subtracting a symbol. */ |
1542 | if (fixP->fx_subsy != (symbolS *) NULL) | |
1543 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
1dab94dd | 1544 | |
e4ef1b6c DC |
1545 | /* For the DIFF relocs, write the value into the object file while still |
1546 | keeping fx_done FALSE, as both the difference (recorded in the object file) | |
75f58085 | 1547 | and the sym offset (part of fixP) are needed at link relax time. */ |
e4ef1b6c | 1548 | where = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
94f592af | 1549 | switch (fixP->fx_r_type) |
adde6300 AM |
1550 | { |
1551 | default: | |
94f592af | 1552 | fixP->fx_no_overflow = 1; |
adde6300 AM |
1553 | break; |
1554 | case BFD_RELOC_AVR_7_PCREL: | |
1555 | case BFD_RELOC_AVR_13_PCREL: | |
1556 | case BFD_RELOC_32: | |
1557 | case BFD_RELOC_16: | |
e4ef1b6c DC |
1558 | break; |
1559 | case BFD_RELOC_AVR_DIFF8: | |
1560 | *where = value; | |
1561 | break; | |
1562 | case BFD_RELOC_AVR_DIFF16: | |
1563 | bfd_putl16 ((bfd_vma) value, where); | |
1564 | break; | |
1565 | case BFD_RELOC_AVR_DIFF32: | |
1566 | bfd_putl32 ((bfd_vma) value, where); | |
1567 | break; | |
adde6300 AM |
1568 | case BFD_RELOC_AVR_CALL: |
1569 | break; | |
1570 | } | |
1571 | ||
94f592af | 1572 | if (fixP->fx_done) |
adde6300 AM |
1573 | { |
1574 | /* Fetch the instruction, insert the fully resolved operand | |
1575 | value, and stuff the instruction back again. */ | |
2132e3a3 | 1576 | where = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
adde6300 AM |
1577 | insn = bfd_getl16 (where); |
1578 | ||
94f592af | 1579 | switch (fixP->fx_r_type) |
adde6300 AM |
1580 | { |
1581 | case BFD_RELOC_AVR_7_PCREL: | |
1582 | if (value & 1) | |
94f592af | 1583 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1584 | _("odd address operand: %ld"), value); |
1dab94dd | 1585 | |
adde6300 AM |
1586 | /* Instruction addresses are always right-shifted by 1. */ |
1587 | value >>= 1; | |
1588 | --value; /* Correct PC. */ | |
1dab94dd | 1589 | |
adde6300 | 1590 | if (value < -64 || value > 63) |
94f592af | 1591 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1592 | _("operand out of range: %ld"), value); |
1593 | value = (value << 3) & 0x3f8; | |
1594 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1595 | break; | |
1596 | ||
1597 | case BFD_RELOC_AVR_13_PCREL: | |
1598 | if (value & 1) | |
94f592af | 1599 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1600 | _("odd address operand: %ld"), value); |
1dab94dd | 1601 | |
adde6300 AM |
1602 | /* Instruction addresses are always right-shifted by 1. */ |
1603 | value >>= 1; | |
1604 | --value; /* Correct PC. */ | |
adde6300 AM |
1605 | |
1606 | if (value < -2048 || value > 2047) | |
1607 | { | |
65aa24b6 | 1608 | /* No wrap for devices with >8K of program memory. */ |
00d2865b | 1609 | if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap) |
94f592af | 1610 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1611 | _("operand out of range: %ld"), value); |
1612 | } | |
1613 | ||
1614 | value &= 0xfff; | |
1615 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1616 | break; | |
1617 | ||
1618 | case BFD_RELOC_32: | |
0b649256 | 1619 | bfd_putl32 ((bfd_vma) value, where); |
adde6300 AM |
1620 | break; |
1621 | ||
1622 | case BFD_RELOC_16: | |
1623 | bfd_putl16 ((bfd_vma) value, where); | |
1624 | break; | |
1625 | ||
17e57237 NC |
1626 | case BFD_RELOC_8: |
1627 | if (value > 255 || value < -128) | |
1628 | as_warn_where (fixP->fx_file, fixP->fx_line, | |
1629 | _("operand out of range: %ld"), value); | |
1630 | *where = value; | |
1631 | break; | |
1632 | ||
adde6300 | 1633 | case BFD_RELOC_AVR_16_PM: |
c6a7ab1f | 1634 | bfd_putl16 ((bfd_vma) (value >> 1), where); |
adde6300 AM |
1635 | break; |
1636 | ||
750bce0e NC |
1637 | case BFD_RELOC_AVR_LDI: |
1638 | if (value > 255) | |
1639 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1640 | _("operand out of range: %ld"), value); | |
1641 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
1642 | break; | |
1643 | ||
f36e8886 BS |
1644 | case BFD_RELOC_AVR_LDS_STS_16: |
1645 | if ((value < 0x40) || (value > 0xBF)) | |
1646 | as_warn_where (fixP->fx_file, fixP->fx_line, | |
1647 | _("operand out of range: 0x%lx"), | |
1648 | (unsigned long)value); | |
1649 | insn |= ((value & 0xF) | ((value & 0x30) << 5) | ((value & 0x40) << 2)); | |
1650 | bfd_putl16 ((bfd_vma) insn, where); | |
1651 | break; | |
1652 | ||
750bce0e NC |
1653 | case BFD_RELOC_AVR_6: |
1654 | if ((value > 63) || (value < 0)) | |
1655 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1656 | _("operand out of range: %ld"), value); | |
f36e8886 BS |
1657 | bfd_putl16 ((bfd_vma) insn | ((value & 7) | ((value & (3 << 3)) << 7) |
1658 | | ((value & (1 << 5)) << 8)), where); | |
750bce0e NC |
1659 | break; |
1660 | ||
1661 | case BFD_RELOC_AVR_6_ADIW: | |
1662 | if ((value > 63) || (value < 0)) | |
1663 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1664 | _("operand out of range: %ld"), value); | |
1665 | bfd_putl16 ((bfd_vma) insn | (value & 0xf) | ((value & 0x30) << 2), where); | |
1666 | break; | |
1667 | ||
adde6300 AM |
1668 | case BFD_RELOC_AVR_LO8_LDI: |
1669 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where); | |
1670 | break; | |
1671 | ||
adde6300 AM |
1672 | case BFD_RELOC_AVR_HI8_LDI: |
1673 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where); | |
1674 | break; | |
1675 | ||
df406460 | 1676 | case BFD_RELOC_AVR_MS8_LDI: |
adde6300 AM |
1677 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where); |
1678 | break; | |
1679 | ||
1680 | case BFD_RELOC_AVR_HH8_LDI: | |
1681 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where); | |
1682 | break; | |
1683 | ||
1684 | case BFD_RELOC_AVR_LO8_LDI_NEG: | |
1685 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where); | |
1686 | break; | |
1687 | ||
adde6300 AM |
1688 | case BFD_RELOC_AVR_HI8_LDI_NEG: |
1689 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where); | |
1690 | break; | |
1691 | ||
df406460 | 1692 | case BFD_RELOC_AVR_MS8_LDI_NEG: |
adde6300 AM |
1693 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where); |
1694 | break; | |
1695 | ||
1696 | case BFD_RELOC_AVR_HH8_LDI_NEG: | |
1697 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where); | |
1698 | break; | |
1699 | ||
1700 | case BFD_RELOC_AVR_LO8_LDI_PM: | |
1701 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where); | |
1702 | break; | |
1703 | ||
1704 | case BFD_RELOC_AVR_HI8_LDI_PM: | |
1705 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where); | |
1706 | break; | |
1707 | ||
1708 | case BFD_RELOC_AVR_HH8_LDI_PM: | |
1709 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where); | |
1710 | break; | |
1711 | ||
1712 | case BFD_RELOC_AVR_LO8_LDI_PM_NEG: | |
1713 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where); | |
1714 | break; | |
1715 | ||
1716 | case BFD_RELOC_AVR_HI8_LDI_PM_NEG: | |
1717 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where); | |
1718 | break; | |
1719 | ||
1720 | case BFD_RELOC_AVR_HH8_LDI_PM_NEG: | |
1721 | bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where); | |
1722 | break; | |
1723 | ||
1724 | case BFD_RELOC_AVR_CALL: | |
1725 | { | |
1726 | unsigned long x; | |
1dab94dd | 1727 | |
adde6300 AM |
1728 | x = bfd_getl16 (where); |
1729 | if (value & 1) | |
94f592af | 1730 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 AM |
1731 | _("odd address operand: %ld"), value); |
1732 | value >>= 1; | |
1733 | x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16; | |
1734 | bfd_putl16 ((bfd_vma) x, where); | |
c6a7ab1f | 1735 | bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2); |
adde6300 AM |
1736 | } |
1737 | break; | |
1738 | ||
99700d6f NC |
1739 | case BFD_RELOC_AVR_8_LO: |
1740 | *where = 0xff & value; | |
1741 | break; | |
1742 | ||
1743 | case BFD_RELOC_AVR_8_HI: | |
1744 | *where = 0xff & (value >> 8); | |
1745 | break; | |
1746 | ||
40551fb8 | 1747 | case BFD_RELOC_AVR_8_HLO: |
99700d6f NC |
1748 | *where = 0xff & (value >> 16); |
1749 | break; | |
1750 | ||
1751 | default: | |
c6a7ab1f | 1752 | as_fatal (_("line %d: unknown relocation type: 0x%x"), |
94f592af | 1753 | fixP->fx_line, fixP->fx_r_type); |
adde6300 | 1754 | break; |
75f58085 BS |
1755 | |
1756 | case BFD_RELOC_AVR_PORT6: | |
1757 | if (value > 63) | |
1758 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1759 | _("operand out of range: %ld"), value); | |
1760 | bfd_putl16 ((bfd_vma) insn | ((value & 0x30) << 5) | (value & 0x0f), where); | |
1761 | break; | |
1762 | ||
1763 | case BFD_RELOC_AVR_PORT5: | |
1764 | if (value > 31) | |
1765 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1766 | _("operand out of range: %ld"), value); | |
1767 | bfd_putl16 ((bfd_vma) insn | ((value & 0x1f) << 3), where); | |
1768 | break; | |
adde6300 AM |
1769 | } |
1770 | } | |
1771 | else | |
1772 | { | |
a61a9fbc | 1773 | switch ((int) fixP->fx_r_type) |
adde6300 AM |
1774 | { |
1775 | case -BFD_RELOC_AVR_HI8_LDI_NEG: | |
1776 | case -BFD_RELOC_AVR_HI8_LDI: | |
1777 | case -BFD_RELOC_AVR_LO8_LDI_NEG: | |
1778 | case -BFD_RELOC_AVR_LO8_LDI: | |
94f592af | 1779 | as_bad_where (fixP->fx_file, fixP->fx_line, |
adde6300 | 1780 | _("only constant expression allowed")); |
94f592af | 1781 | fixP->fx_done = 1; |
adde6300 AM |
1782 | break; |
1783 | default: | |
1784 | break; | |
1785 | } | |
adde6300 | 1786 | } |
adde6300 AM |
1787 | } |
1788 | ||
7be1c489 AM |
1789 | /* GAS will call this to generate a reloc, passing the resulting reloc |
1790 | to `bfd_install_relocation'. This currently works poorly, as | |
1791 | `bfd_install_relocation' often does the wrong thing, and instances of | |
1792 | `tc_gen_reloc' have been written to work around the problems, which | |
1793 | in turns makes it difficult to fix `bfd_install_relocation'. */ | |
adde6300 AM |
1794 | |
1795 | /* If while processing a fixup, a reloc really needs to be created | |
1796 | then it is done here. */ | |
1797 | ||
1798 | arelent * | |
dc191a8f NC |
1799 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, |
1800 | fixS *fixp) | |
adde6300 AM |
1801 | { |
1802 | arelent *reloc; | |
328e7bfd | 1803 | bfd_reloc_code_real_type code = fixp->fx_r_type; |
adde6300 | 1804 | |
94d4433a | 1805 | if (fixp->fx_subsy != NULL) |
df406460 | 1806 | { |
94d4433a | 1807 | as_bad_where (fixp->fx_file, fixp->fx_line, _("expression too complex")); |
df406460 NC |
1808 | return NULL; |
1809 | } | |
1810 | ||
325801bd | 1811 | reloc = XNEW (arelent); |
adde6300 | 1812 | |
325801bd | 1813 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
adde6300 AM |
1814 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
1815 | ||
1816 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
328e7bfd DC |
1817 | |
1818 | if ((fixp->fx_r_type == BFD_RELOC_32) && (fixp->fx_pcrel)) | |
1819 | { | |
1820 | if (seg->use_rela_p) | |
1821 | fixp->fx_offset -= md_pcrel_from_section (fixp, seg); | |
1822 | else | |
1823 | fixp->fx_offset = reloc->address; | |
1824 | ||
1825 | code = BFD_RELOC_32_PCREL; | |
1826 | } | |
1827 | ||
1828 | reloc->addend = fixp->fx_offset; | |
1829 | ||
1830 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
1831 | ||
adde6300 AM |
1832 | if (reloc->howto == (reloc_howto_type *) NULL) |
1833 | { | |
1834 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
c6a7ab1f NC |
1835 | _("reloc %d not supported by object file format"), |
1836 | (int) fixp->fx_r_type); | |
adde6300 AM |
1837 | return NULL; |
1838 | } | |
1839 | ||
1840 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1841 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1842 | reloc->address = fixp->fx_offset; | |
1843 | ||
adde6300 AM |
1844 | |
1845 | return reloc; | |
1846 | } | |
1847 | ||
adde6300 | 1848 | void |
dc191a8f | 1849 | md_assemble (char *str) |
adde6300 | 1850 | { |
c6a7ab1f | 1851 | struct avr_opcodes_s *opcode; |
adde6300 AM |
1852 | char op[11]; |
1853 | ||
c6a7ab1f | 1854 | str = skip_space (extract_word (str, op, sizeof (op))); |
adde6300 AM |
1855 | |
1856 | if (!op[0]) | |
00d2865b | 1857 | as_bad (_("can't find opcode ")); |
adde6300 AM |
1858 | |
1859 | opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op); | |
1860 | ||
f36e8886 BS |
1861 | if (opcode && !avr_opt.all_opcodes) |
1862 | { | |
75f58085 | 1863 | /* Check if the instruction's ISA bit is ON in the ISA bits of the part |
f36e8886 | 1864 | specified by the user. If not look for other instructions |
75f58085 | 1865 | specifications with same mnemonic who's ISA bits matches. |
f36e8886 BS |
1866 | |
1867 | This requires include/opcode/avr.h to have the instructions with | |
33eaf5de | 1868 | same mnemonic to be specified in sequence. */ |
f36e8886 BS |
1869 | |
1870 | while ((opcode->isa & avr_mcu->isa) != opcode->isa) | |
1871 | { | |
1872 | opcode++; | |
75f58085 | 1873 | |
f36e8886 BS |
1874 | if (opcode->name && strcmp(op, opcode->name)) |
1875 | { | |
75f58085 | 1876 | as_bad (_("illegal opcode %s for mcu %s"), |
f36e8886 BS |
1877 | opcode->name, avr_mcu->name); |
1878 | return; | |
1879 | } | |
1880 | } | |
75f58085 | 1881 | } |
f36e8886 | 1882 | |
adde6300 AM |
1883 | if (opcode == NULL) |
1884 | { | |
00d2865b | 1885 | as_bad (_("unknown opcode `%s'"), op); |
adde6300 AM |
1886 | return; |
1887 | } | |
1888 | ||
32f76c67 GJL |
1889 | if (opcode == avr_gccisr_opcode |
1890 | && !avr_opt.have_gccisr) | |
1891 | { | |
1892 | as_bad (_("pseudo instruction `%s' not supported"), op); | |
1893 | return; | |
1894 | } | |
1895 | ||
b170af93 | 1896 | /* Special case for opcodes with optional operands (lpm, elpm) - |
1188e082 | 1897 | version with operands exists in avr_opcodes[] in the next entry. */ |
c6a7ab1f | 1898 | |
1188e082 DC |
1899 | if (*str && *opcode->constraints == '?') |
1900 | ++opcode; | |
b170af93 | 1901 | |
d4f4f3fb AM |
1902 | dwarf2_emit_insn (0); |
1903 | ||
adde6300 AM |
1904 | /* We used to set input_line_pointer to the result of get_operands, |
1905 | but that is wrong. Our caller assumes we don't change it. */ | |
1906 | { | |
1907 | char *t = input_line_pointer; | |
dc191a8f | 1908 | |
32f76c67 GJL |
1909 | if (opcode == avr_gccisr_opcode) |
1910 | avr_gccisr_operands (opcode, &str); | |
1911 | else | |
1912 | avr_operands (opcode, &str); | |
b170af93 | 1913 | if (*skip_space (str)) |
00d2865b | 1914 | as_bad (_("garbage at end of line")); |
adde6300 AM |
1915 | input_line_pointer = t; |
1916 | } | |
1917 | } | |
1918 | ||
62ebcb5c | 1919 | const exp_mod_data_t exp_mod_data[] = |
99700d6f NC |
1920 | { |
1921 | /* Default, must be first. */ | |
1922 | { "", 0, BFD_RELOC_16, "" }, | |
1923 | /* Divides by 2 to get word address. Generate Stub. */ | |
1924 | { "gs", 2, BFD_RELOC_AVR_16_PM, "`gs' " }, | |
1925 | { "pm", 2, BFD_RELOC_AVR_16_PM, "`pm' " }, | |
1926 | /* The following are used together with avr-gcc's __memx address space | |
1927 | in order to initialize a 24-bit pointer variable with a 24-bit address. | |
40551fb8 NC |
1928 | For address in flash, hlo8 will contain the flash segment if the |
1929 | symbol is located in flash. If the symbol is located in RAM; hlo8 | |
99700d6f NC |
1930 | will contain 0x80 which matches avr-gcc's notion of how 24-bit RAM/flash |
1931 | addresses linearize address space. */ | |
1932 | { "lo8", 1, BFD_RELOC_AVR_8_LO, "`lo8' " }, | |
1933 | { "hi8", 1, BFD_RELOC_AVR_8_HI, "`hi8' " }, | |
40551fb8 NC |
1934 | { "hlo8", 1, BFD_RELOC_AVR_8_HLO, "`hlo8' " }, |
1935 | { "hh8", 1, BFD_RELOC_AVR_8_HLO, "`hh8' " }, | |
99700d6f NC |
1936 | }; |
1937 | ||
99700d6f NC |
1938 | /* Parse special CONS expression: pm (expression) or alternatively |
1939 | gs (expression). These are used for addressing program memory. Moreover, | |
40551fb8 | 1940 | define lo8 (expression), hi8 (expression) and hlo8 (expression). */ |
c6a7ab1f | 1941 | |
62ebcb5c | 1942 | const exp_mod_data_t * |
dc191a8f | 1943 | avr_parse_cons_expression (expressionS *exp, int nbytes) |
adde6300 | 1944 | { |
c6a7ab1f | 1945 | char *tmp; |
814f1489 | 1946 | unsigned int i; |
adde6300 | 1947 | |
adde6300 AM |
1948 | tmp = input_line_pointer = skip_space (input_line_pointer); |
1949 | ||
99700d6f NC |
1950 | /* The first entry of exp_mod_data[] contains an entry if no |
1951 | expression modifier is present. Skip it. */ | |
1952 | ||
814f1489 | 1953 | for (i = 0; i < ARRAY_SIZE (exp_mod_data); i++) |
adde6300 | 1954 | { |
814f1489 | 1955 | const exp_mod_data_t *pexp = &exp_mod_data[i]; |
99700d6f | 1956 | int len = strlen (pexp->name); |
1dab94dd | 1957 | |
99700d6f NC |
1958 | if (nbytes == pexp->nbytes |
1959 | && strncasecmp (input_line_pointer, pexp->name, len) == 0) | |
adde6300 AM |
1960 | { |
1961 | input_line_pointer = skip_space (input_line_pointer + len); | |
1dab94dd | 1962 | |
adde6300 AM |
1963 | if (*input_line_pointer == '(') |
1964 | { | |
1965 | input_line_pointer = skip_space (input_line_pointer + 1); | |
adde6300 | 1966 | expression (exp); |
1dab94dd | 1967 | |
adde6300 | 1968 | if (*input_line_pointer == ')') |
62ebcb5c AM |
1969 | { |
1970 | ++input_line_pointer; | |
1971 | return pexp; | |
1972 | } | |
adde6300 AM |
1973 | else |
1974 | { | |
00d2865b | 1975 | as_bad (_("`)' required")); |
62ebcb5c | 1976 | return &exp_mod_data[0]; |
adde6300 | 1977 | } |
adde6300 | 1978 | } |
1dab94dd | 1979 | |
adde6300 | 1980 | input_line_pointer = tmp; |
99700d6f NC |
1981 | |
1982 | break; | |
adde6300 AM |
1983 | } |
1984 | } | |
1dab94dd | 1985 | |
adde6300 | 1986 | expression (exp); |
62ebcb5c | 1987 | return &exp_mod_data[0]; |
adde6300 AM |
1988 | } |
1989 | ||
1990 | void | |
dc191a8f NC |
1991 | avr_cons_fix_new (fragS *frag, |
1992 | int where, | |
1993 | int nbytes, | |
62ebcb5c AM |
1994 | expressionS *exp, |
1995 | const exp_mod_data_t *pexp_mod_data) | |
adde6300 | 1996 | { |
99700d6f NC |
1997 | int bad = 0; |
1998 | ||
1999 | switch (pexp_mod_data->reloc) | |
adde6300 | 2000 | { |
99700d6f | 2001 | default: |
17e57237 NC |
2002 | if (nbytes == 1) |
2003 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_8); | |
2004 | else if (nbytes == 2) | |
b34976b6 | 2005 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16); |
adde6300 | 2006 | else if (nbytes == 4) |
b34976b6 | 2007 | fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32); |
adde6300 | 2008 | else |
99700d6f NC |
2009 | bad = 1; |
2010 | break; | |
2011 | ||
2012 | case BFD_RELOC_AVR_16_PM: | |
2013 | case BFD_RELOC_AVR_8_LO: | |
2014 | case BFD_RELOC_AVR_8_HI: | |
40551fb8 | 2015 | case BFD_RELOC_AVR_8_HLO: |
99700d6f NC |
2016 | if (nbytes == pexp_mod_data->nbytes) |
2017 | fix_new_exp (frag, where, nbytes, exp, FALSE, pexp_mod_data->reloc); | |
adde6300 | 2018 | else |
99700d6f NC |
2019 | bad = 1; |
2020 | break; | |
adde6300 | 2021 | } |
99700d6f NC |
2022 | |
2023 | if (bad) | |
33eaf5de | 2024 | as_bad (_("illegal %s relocation size: %d"), pexp_mod_data->error, nbytes); |
adde6300 | 2025 | } |
af3ecb4a | 2026 | |
71863e73 NC |
2027 | static bfd_boolean |
2028 | mcu_has_3_byte_pc (void) | |
2029 | { | |
75f58085 | 2030 | int mach = avr_mcu->mach; |
71863e73 | 2031 | |
75f58085 BS |
2032 | return mach == bfd_mach_avr6 |
2033 | || mach == bfd_mach_avrxmega6 | |
71863e73 NC |
2034 | || mach == bfd_mach_avrxmega7; |
2035 | } | |
2036 | ||
af3ecb4a RH |
2037 | void |
2038 | tc_cfi_frame_initial_instructions (void) | |
2039 | { | |
2040 | /* AVR6 pushes 3 bytes for calls. */ | |
71863e73 | 2041 | int return_size = (mcu_has_3_byte_pc () ? 3 : 2); |
af3ecb4a RH |
2042 | |
2043 | /* The CFA is the caller's stack location before the call insn. */ | |
2044 | /* Note that the stack pointer is dwarf register number 32. */ | |
2045 | cfi_add_CFA_def_cfa (32, return_size); | |
2046 | ||
2047 | /* Note that AVR consistently uses post-decrement, which means that things | |
33eaf5de | 2048 | do not line up the same way as for targets that use pre-decrement. */ |
af3ecb4a RH |
2049 | cfi_add_CFA_offset (DWARF2_DEFAULT_RETURN_COLUMN, 1-return_size); |
2050 | } | |
e4ef1b6c DC |
2051 | |
2052 | bfd_boolean | |
2053 | avr_allow_local_subtract (expressionS * left, | |
2054 | expressionS * right, | |
2055 | segT section) | |
2056 | { | |
75f58085 | 2057 | /* If we are not in relaxation mode, subtraction is OK. */ |
e4ef1b6c DC |
2058 | if (!linkrelax) |
2059 | return TRUE; | |
2060 | ||
2061 | /* If the symbols are not in a code section then they are OK. */ | |
2062 | if ((section->flags & SEC_CODE) == 0) | |
2063 | return TRUE; | |
2064 | ||
2065 | if (left->X_add_symbol == right->X_add_symbol) | |
2066 | return TRUE; | |
2067 | ||
2068 | /* We have to assume that there may be instructions between the | |
2069 | two symbols and that relaxation may increase the distance between | |
2070 | them. */ | |
2071 | return FALSE; | |
2072 | } | |
eac7440d AB |
2073 | |
2074 | void | |
2075 | avr_elf_final_processing (void) | |
2076 | { | |
2077 | if (linkrelax) | |
2078 | elf_elfheader (stdoutput)->e_flags |= EF_AVR_LINKRELAX_PREPARED; | |
2079 | } | |
fdd410ac AB |
2080 | |
2081 | /* Write out the header of a .avr.prop section into the area pointed to by | |
2082 | DATA. The RECORD_COUNT will be placed in the header as the number of | |
2083 | records that are to follow. | |
2084 | The area DATA must be big enough the receive the header, which is | |
2085 | AVR_PROPERTY_SECTION_HEADER_SIZE bytes long. */ | |
2086 | ||
2087 | static char * | |
2088 | avr_output_property_section_header (char *data, | |
2089 | unsigned int record_count) | |
2090 | { | |
2091 | char *orig_data = data; | |
2092 | ||
2093 | md_number_to_chars (data, AVR_PROPERTY_RECORDS_VERSION, 1); | |
2094 | data++; | |
2095 | /* There's space for a single byte flags field, but right now there's | |
2096 | nothing to go in here, so just set the value to zero. */ | |
2097 | md_number_to_chars (data, 0, 1); | |
2098 | data++; | |
2099 | md_number_to_chars (data, record_count, 2); | |
2100 | data+=2; | |
2101 | ||
2102 | gas_assert (data - orig_data == AVR_PROPERTY_SECTION_HEADER_SIZE); | |
2103 | ||
2104 | return data; | |
2105 | } | |
2106 | ||
2107 | /* Return the number of bytes required to store RECORD into the .avr.prop | |
2108 | section. The size returned is the compressed size that corresponds to | |
2109 | how the record will be written out in AVR_OUTPUT_PROPERTY_RECORD. */ | |
2110 | ||
2111 | static int | |
2112 | avr_record_size (const struct avr_property_record *record) | |
2113 | { | |
2114 | /* The first 5 bytes are a 4-byte address, followed by a 1-byte type | |
2115 | identifier. */ | |
2116 | int size = 5; | |
2117 | ||
2118 | switch (record->type) | |
2119 | { | |
2120 | case RECORD_ORG: | |
2121 | size += 0; /* No extra information. */ | |
2122 | break; | |
2123 | ||
2124 | case RECORD_ORG_AND_FILL: | |
2125 | size += 4; /* A 4-byte fill value. */ | |
2126 | break; | |
2127 | ||
2128 | case RECORD_ALIGN: | |
2129 | size += 4; /* A 4-byte alignment value. */ | |
2130 | break; | |
2131 | ||
2132 | case RECORD_ALIGN_AND_FILL: | |
2133 | size += 8; /* A 4-byte alignment, and 4-byte fill value. */ | |
2134 | break; | |
2135 | ||
2136 | default: | |
2137 | as_fatal (_("unknown record type %d (in %s)"), | |
2138 | record->type, __PRETTY_FUNCTION__); | |
2139 | } | |
2140 | ||
2141 | return size; | |
2142 | } | |
2143 | ||
2144 | /* Write out RECORD. FRAG_BASE points to the start of the data area setup | |
2145 | to hold all of the .avr.prop content, FRAG_PTR points to the next | |
2146 | writable location. The data area must be big enough to hold all of the | |
2147 | records. The size of the data written out for this RECORD must match | |
2148 | the size from AVR_RECORD_SIZE. */ | |
2149 | ||
2150 | static char * | |
2151 | avr_output_property_record (char * const frag_base, char *frag_ptr, | |
2152 | const struct avr_property_record *record) | |
2153 | { | |
2154 | fixS *fix; | |
2155 | int where; | |
2156 | char *init_frag_ptr = frag_ptr; | |
2157 | ||
2158 | where = frag_ptr - frag_base; | |
2159 | fix = fix_new (frag_now, where, 4, | |
2160 | section_symbol (record->section), | |
2161 | record->offset, FALSE, BFD_RELOC_32); | |
2162 | fix->fx_file = "<internal>"; | |
2163 | fix->fx_line = 0; | |
2164 | frag_ptr += 4; | |
2165 | ||
2166 | md_number_to_chars (frag_ptr, (bfd_byte) record->type, 1); | |
2167 | frag_ptr += 1; | |
2168 | ||
2169 | /* Write out the rest of the data. */ | |
2170 | switch (record->type) | |
2171 | { | |
2172 | case RECORD_ORG: | |
2173 | break; | |
2174 | ||
2175 | case RECORD_ORG_AND_FILL: | |
2176 | md_number_to_chars (frag_ptr, record->data.org.fill, 4); | |
2177 | frag_ptr += 4; | |
2178 | break; | |
2179 | ||
2180 | case RECORD_ALIGN: | |
2181 | md_number_to_chars (frag_ptr, record->data.align.bytes, 4); | |
2182 | frag_ptr += 4; | |
2183 | break; | |
2184 | ||
2185 | case RECORD_ALIGN_AND_FILL: | |
2186 | md_number_to_chars (frag_ptr, record->data.align.bytes, 4); | |
431ff075 | 2187 | md_number_to_chars (frag_ptr + 4, record->data.align.fill, 4); |
fdd410ac AB |
2188 | frag_ptr += 8; |
2189 | break; | |
2190 | ||
2191 | default: | |
2192 | as_fatal (_("unknown record type %d (in %s)"), | |
2193 | record->type, __PRETTY_FUNCTION__); | |
2194 | } | |
2195 | ||
2196 | gas_assert (frag_ptr - init_frag_ptr == avr_record_size (record)); | |
2197 | ||
2198 | return frag_ptr; | |
2199 | } | |
2200 | ||
2201 | /* Create the section to hold the AVR property information. Return the | |
2202 | section. */ | |
2203 | ||
2204 | static asection * | |
2205 | avr_create_property_section (void) | |
2206 | { | |
2207 | asection *sec; | |
2208 | flagword flags = (SEC_RELOC | SEC_HAS_CONTENTS | SEC_READONLY); | |
2209 | const char *section_name = AVR_PROPERTY_RECORD_SECTION_NAME; | |
2210 | ||
2211 | sec = bfd_make_section (stdoutput, section_name); | |
2212 | if (sec == NULL) | |
2213 | as_fatal (_("Failed to create property section `%s'\n"), section_name); | |
2214 | bfd_set_section_flags (stdoutput, sec, flags); | |
2215 | sec->output_section = sec; | |
2216 | return sec; | |
2217 | } | |
2218 | ||
2219 | /* This hook is called when alignment is performed, and allows us to | |
2220 | capture the details of both .org and .align directives. */ | |
2221 | ||
2222 | void | |
2223 | avr_handle_align (fragS *fragP) | |
2224 | { | |
2225 | if (linkrelax) | |
2226 | { | |
2227 | /* Ignore alignment requests at FR_ADDRESS 0, these are at the very | |
2228 | start of a section, and will be handled by the standard section | |
2229 | alignment mechanism. */ | |
2230 | if ((fragP->fr_type == rs_align | |
2231 | || fragP->fr_type == rs_align_code) | |
fdd410ac AB |
2232 | && fragP->fr_offset > 0) |
2233 | { | |
431ff075 AB |
2234 | char *p = fragP->fr_literal + fragP->fr_fix; |
2235 | ||
fdd410ac AB |
2236 | fragP->tc_frag_data.is_align = TRUE; |
2237 | fragP->tc_frag_data.alignment = fragP->fr_offset; | |
431ff075 AB |
2238 | fragP->tc_frag_data.fill = *p; |
2239 | fragP->tc_frag_data.has_fill = (fragP->tc_frag_data.fill != 0); | |
fdd410ac AB |
2240 | } |
2241 | ||
2242 | if (fragP->fr_type == rs_org && fragP->fr_offset > 0) | |
2243 | { | |
2244 | char *p = fragP->fr_literal + fragP->fr_fix; | |
2245 | ||
2246 | fragP->tc_frag_data.is_org = TRUE; | |
2247 | fragP->tc_frag_data.fill = *p; | |
2248 | fragP->tc_frag_data.has_fill = (fragP->tc_frag_data.fill != 0); | |
2249 | } | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | /* Return TRUE if this section is not one for which we need to record | |
2254 | information in the avr property section. */ | |
2255 | ||
2256 | static bfd_boolean | |
2257 | exclude_section_from_property_tables (segT sec) | |
2258 | { | |
2259 | /* Only generate property information for sections on which linker | |
2260 | relaxation could be performed. */ | |
2261 | return !relaxable_section (sec); | |
2262 | } | |
2263 | ||
2264 | /* Create a property record for fragment FRAGP from section SEC and place | |
2265 | it into an AVR_PROPERTY_RECORD_LINK structure, which can then formed | |
2266 | into a linked list by the caller. */ | |
2267 | ||
2268 | static struct avr_property_record_link * | |
2269 | create_record_for_frag (segT sec, fragS *fragP) | |
2270 | { | |
ef7a9369 | 2271 | struct avr_property_record_link *prop_rec_link; |
fdd410ac | 2272 | |
325801bd | 2273 | prop_rec_link = XCNEW (struct avr_property_record_link); |
431ff075 | 2274 | gas_assert (fragP->fr_next != NULL); |
fdd410ac AB |
2275 | |
2276 | if (fragP->tc_frag_data.is_org) | |
2277 | { | |
ef7a9369 SKS |
2278 | prop_rec_link->record.offset = fragP->fr_next->fr_address; |
2279 | prop_rec_link->record.section = sec; | |
fdd410ac AB |
2280 | |
2281 | if (fragP->tc_frag_data.has_fill) | |
2282 | { | |
ef7a9369 SKS |
2283 | prop_rec_link->record.data.org.fill = fragP->tc_frag_data.fill; |
2284 | prop_rec_link->record.type = RECORD_ORG_AND_FILL; | |
fdd410ac AB |
2285 | } |
2286 | else | |
ef7a9369 | 2287 | prop_rec_link->record.type = RECORD_ORG; |
fdd410ac AB |
2288 | } |
2289 | else | |
2290 | { | |
431ff075 | 2291 | prop_rec_link->record.offset = fragP->fr_next->fr_address; |
ef7a9369 | 2292 | prop_rec_link->record.section = sec; |
fdd410ac AB |
2293 | |
2294 | gas_assert (fragP->tc_frag_data.is_align); | |
2295 | if (fragP->tc_frag_data.has_fill) | |
2296 | { | |
ef7a9369 SKS |
2297 | prop_rec_link->record.data.align.fill = fragP->tc_frag_data.fill; |
2298 | prop_rec_link->record.type = RECORD_ALIGN_AND_FILL; | |
fdd410ac AB |
2299 | } |
2300 | else | |
ef7a9369 SKS |
2301 | prop_rec_link->record.type = RECORD_ALIGN; |
2302 | prop_rec_link->record.data.align.bytes = fragP->tc_frag_data.alignment; | |
fdd410ac AB |
2303 | } |
2304 | ||
ef7a9369 | 2305 | return prop_rec_link; |
fdd410ac AB |
2306 | } |
2307 | ||
2308 | /* Build a list of AVR_PROPERTY_RECORD_LINK structures for section SEC, and | |
2309 | merged them onto the list pointed to by NEXT_PTR. Return a pointer to | |
2310 | the last list item created. */ | |
2311 | ||
2312 | static struct avr_property_record_link ** | |
2313 | append_records_for_section (segT sec, | |
2314 | struct avr_property_record_link **next_ptr) | |
2315 | { | |
2316 | segment_info_type *seginfo = seg_info (sec); | |
2317 | fragS *fragP; | |
2318 | ||
2319 | if (seginfo && seginfo->frchainP) | |
2320 | { | |
2321 | for (fragP = seginfo->frchainP->frch_root; | |
2322 | fragP; | |
2323 | fragP = fragP->fr_next) | |
2324 | { | |
2325 | if (fragP->tc_frag_data.is_align | |
2326 | || fragP->tc_frag_data.is_org) | |
2327 | { | |
2328 | /* Create a single new entry. */ | |
2329 | struct avr_property_record_link *new_link | |
2330 | = create_record_for_frag (sec, fragP); | |
2331 | ||
2332 | *next_ptr = new_link; | |
2333 | next_ptr = &new_link->next; | |
2334 | } | |
2335 | } | |
2336 | } | |
2337 | ||
2338 | return next_ptr; | |
2339 | } | |
2340 | ||
2341 | /* Create the AVR property section and fill it with records of .org and | |
2342 | .align directives that were used. The section is only created if it | |
2343 | will actually have any content. */ | |
2344 | ||
2345 | static void | |
2346 | avr_create_and_fill_property_section (void) | |
2347 | { | |
2348 | segT *seclist; | |
2349 | asection *prop_sec; | |
2350 | struct avr_property_record_link *r_list, **next_ptr; | |
2351 | char *frag_ptr, *frag_base; | |
2352 | bfd_size_type sec_size; | |
2353 | struct avr_property_record_link *rec; | |
2354 | unsigned int record_count; | |
2355 | ||
2356 | /* First walk over all sections. For sections on which linker | |
2357 | relaxation could be applied, extend the record list. The record list | |
2358 | holds information that the linker will need to know. */ | |
2359 | ||
2360 | prop_sec = NULL; | |
2361 | r_list = NULL; | |
2362 | next_ptr = &r_list; | |
2363 | for (seclist = &stdoutput->sections; | |
2364 | seclist && *seclist; | |
2365 | seclist = &(*seclist)->next) | |
2366 | { | |
2367 | segT sec = *seclist; | |
2368 | ||
2369 | if (exclude_section_from_property_tables (sec)) | |
2370 | continue; | |
2371 | ||
2372 | next_ptr = append_records_for_section (sec, next_ptr); | |
2373 | } | |
2374 | ||
2375 | /* Create property section and ensure the size is correct. We've already | |
2376 | passed the point where gas could size this for us. */ | |
2377 | sec_size = AVR_PROPERTY_SECTION_HEADER_SIZE; | |
2378 | record_count = 0; | |
2379 | for (rec = r_list; rec != NULL; rec = rec->next) | |
2380 | { | |
2381 | record_count++; | |
2382 | sec_size += avr_record_size (&rec->record); | |
2383 | } | |
2384 | ||
2385 | if (record_count == 0) | |
2386 | return; | |
2387 | ||
2388 | prop_sec = avr_create_property_section (); | |
2389 | bfd_set_section_size (stdoutput, prop_sec, sec_size); | |
2390 | ||
2391 | subseg_set (prop_sec, 0); | |
2392 | frag_base = frag_more (sec_size); | |
2393 | ||
2394 | frag_ptr = | |
2395 | avr_output_property_section_header (frag_base, record_count); | |
2396 | ||
2397 | for (rec = r_list; rec != NULL; rec = rec->next) | |
2398 | frag_ptr = avr_output_property_record (frag_base, frag_ptr, &rec->record); | |
2399 | ||
2400 | frag_wane (frag_now); | |
2401 | frag_new (0); | |
2402 | frag_wane (frag_now); | |
2403 | } | |
2404 | ||
2405 | /* We're using this hook to build up the AVR property section. It's called | |
2406 | late in the assembly process which suits our needs. */ | |
2407 | void | |
2408 | avr_post_relax_hook (void) | |
2409 | { | |
2410 | avr_create_and_fill_property_section (); | |
2411 | } | |
32f76c67 GJL |
2412 | |
2413 | ||
2414 | /* Accumulate information about instruction sequence to `avr_isr': | |
2415 | wheter TMP_REG, ZERO_REG and SREG might be touched. Used during parse. | |
2416 | REG1 is either -1 or a register number used by the instruction as input | |
2417 | or output operand. Similar for REG2. */ | |
2418 | ||
2419 | static void | |
2420 | avr_update_gccisr (struct avr_opcodes_s *opcode, int reg1, int reg2) | |
2421 | { | |
2422 | const int tiny_p = avr_mcu->mach == bfd_mach_avrtiny; | |
2423 | const int reg_tmp = tiny_p ? 16 : 0; | |
2424 | const int reg_zero = 1 + reg_tmp; | |
2425 | ||
2426 | if (ISR_CHUNK_Done == avr_isr.prev_chunk | |
2427 | || (avr_isr.need_sreg | |
2428 | && avr_isr.need_reg_tmp | |
2429 | && avr_isr.need_reg_zero)) | |
2430 | { | |
2431 | /* Nothing (more) to do */ | |
2432 | return; | |
2433 | } | |
2434 | ||
2435 | /* SREG: Look up instructions that don't clobber SREG. */ | |
2436 | ||
2437 | if (!avr_isr.need_sreg | |
2438 | && !hash_find (avr_no_sreg_hash, opcode->name)) | |
2439 | { | |
2440 | avr_isr.need_sreg = 1; | |
2441 | } | |
2442 | ||
2443 | /* Handle explicit register operands. Record *any* use as clobber. | |
2444 | This is because TMP_REG and ZERO_REG are not global and using | |
2445 | them makes no sense without a previous set. */ | |
2446 | ||
2447 | avr_isr.need_reg_tmp |= reg1 == reg_tmp || reg2 == reg_tmp; | |
2448 | avr_isr.need_reg_zero |= reg1 == reg_zero || reg2 == reg_zero; | |
2449 | ||
2450 | /* Handle implicit register operands and some opaque stuff. */ | |
2451 | ||
2452 | if (strstr (opcode->name, "lpm") | |
2453 | && '?' == *opcode->constraints) | |
2454 | { | |
2455 | avr_isr.need_reg_tmp = 1; | |
2456 | } | |
2457 | ||
2458 | if (strstr (opcode->name, "call") | |
2459 | || strstr (opcode->name, "mul") | |
2460 | || 0 == strcmp (opcode->name, "des") | |
2461 | || (0 == strcmp (opcode->name, "movw") | |
2462 | && (reg1 == reg_tmp || reg2 == reg_tmp))) | |
2463 | { | |
2464 | avr_isr.need_reg_tmp = 1; | |
2465 | avr_isr.need_reg_zero = 1; | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | ||
2470 | /* Emit some 1-word instruction to **PWHERE and advance *PWHERE by the number | |
2471 | of octets written. INSN specifies the desired instruction and REG is the | |
2472 | register used by it. This function is only used with restricted subset of | |
2473 | instructions as might be emit by `__gcc_isr'. IN / OUT will use SREG | |
2474 | and LDI loads 0. */ | |
2475 | ||
2476 | static void | |
2477 | avr_emit_insn (const char *insn, int reg, char **pwhere) | |
2478 | { | |
2479 | const int sreg = 0x3f; | |
2480 | unsigned bin = 0; | |
2481 | const struct avr_opcodes_s *op | |
2482 | = (struct avr_opcodes_s*) hash_find (avr_hash, insn); | |
2483 | ||
2484 | /* We only have to deal with: IN, OUT, PUSH, POP, CLR, LDI 0. All of | |
2485 | these deal with at least one Reg and are 1-word instructions. */ | |
2486 | ||
2487 | gas_assert (op && 1 == op->insn_size); | |
2488 | gas_assert (reg >= 0 && reg <= 31); | |
2489 | ||
2490 | if (strchr (op->constraints, 'r')) | |
2491 | { | |
2492 | bin = op->bin_opcode | (reg << 4); | |
2493 | } | |
2494 | else if (strchr (op->constraints, 'd')) | |
2495 | { | |
2496 | gas_assert (reg >= 16); | |
2497 | bin = op->bin_opcode | ((reg & 0xf) << 4); | |
2498 | } | |
2499 | else | |
2500 | abort(); | |
2501 | ||
2502 | if (strchr (op->constraints, 'P')) | |
2503 | { | |
2504 | bin |= ((sreg & 0x30) << 5) | (sreg & 0x0f); | |
2505 | } | |
2506 | else if (0 == strcmp ("r=r", op->constraints)) | |
2507 | { | |
2508 | bin |= ((reg & 0x10) << 5) | (reg & 0x0f); | |
2509 | } | |
2510 | else | |
2511 | gas_assert (0 == strcmp ("r", op->constraints) | |
2512 | || 0 == strcmp ("ldi", op->name)); | |
2513 | ||
2514 | bfd_putl16 ((bfd_vma) bin, *pwhere); | |
2515 | (*pwhere) += 2 * op->insn_size; | |
2516 | } | |
2517 | ||
2518 | ||
2519 | /* Turn rs_machine_dependent frag *FR into an ordinary rs_fill code frag, | |
2520 | using information gathered in `avr_isr'. REG is the register number as | |
2521 | supplied by Done chunk "__gcc_isr 0,REG". */ | |
2522 | ||
2523 | static void | |
2524 | avr_patch_gccisr_frag (fragS *fr, int reg) | |
2525 | { | |
2526 | int treg; | |
2527 | int n_pushed = 0; | |
2528 | char *where = fr->fr_literal; | |
2529 | const int tiny_p = avr_mcu->mach == bfd_mach_avrtiny; | |
2530 | const int reg_tmp = tiny_p ? 16 : 0; | |
2531 | const int reg_zero = 1 + reg_tmp; | |
2532 | ||
2533 | /* Clearing ZERO_REG on non-Tiny needs CLR which clobbers SREG. */ | |
2534 | ||
2535 | avr_isr.need_sreg |= !tiny_p && avr_isr.need_reg_zero; | |
2536 | ||
2537 | /* A working register to PUSH / POP the SREG. We might use the register | |
2538 | as supplied by ISR_CHUNK_Done for that purpose as GCC wants to push | |
2539 | it anyways. If GCC passes ZERO_REG or TMP_REG, it has no clue (and | |
2540 | no additional regs to safe) and we use that reg. */ | |
2541 | ||
2542 | treg | |
2543 | = avr_isr.need_reg_tmp ? reg_tmp | |
2544 | : avr_isr.need_reg_zero ? reg_zero | |
2545 | : avr_isr.need_sreg ? reg | |
2546 | : reg > reg_zero ? reg | |
2547 | : -1; | |
2548 | ||
2549 | if (treg >= 0) | |
2550 | { | |
2551 | /* Non-empty prologue / epilogue */ | |
2552 | ||
2553 | if (ISR_CHUNK_Prologue == fr->fr_subtype) | |
2554 | { | |
2555 | avr_emit_insn ("push", treg, &where); | |
2556 | n_pushed++; | |
2557 | ||
2558 | if (avr_isr.need_sreg) | |
2559 | { | |
2560 | avr_emit_insn ("in", treg, &where); | |
2561 | avr_emit_insn ("push", treg, &where); | |
2562 | n_pushed++; | |
2563 | } | |
2564 | ||
2565 | if (avr_isr.need_reg_zero) | |
2566 | { | |
2567 | if (reg_zero != treg) | |
2568 | { | |
2569 | avr_emit_insn ("push", reg_zero, &where); | |
2570 | n_pushed++; | |
2571 | } | |
2572 | avr_emit_insn (tiny_p ? "ldi" : "clr", reg_zero, &where); | |
2573 | } | |
2574 | ||
2575 | if (reg > reg_zero && reg != treg) | |
2576 | { | |
2577 | avr_emit_insn ("push", reg, &where); | |
2578 | n_pushed++; | |
2579 | } | |
2580 | } | |
2581 | else if (ISR_CHUNK_Epilogue == fr->fr_subtype) | |
2582 | { | |
2583 | /* Same logic as in Prologue but in reverse order and with counter | |
2584 | parts of either instruction: POP instead of PUSH and OUT instead | |
2585 | of IN. Clearing ZERO_REG has no couter part. */ | |
2586 | ||
2587 | if (reg > reg_zero && reg != treg) | |
2588 | avr_emit_insn ("pop", reg, &where); | |
2589 | ||
2590 | if (avr_isr.need_reg_zero | |
2591 | && reg_zero != treg) | |
2592 | avr_emit_insn ("pop", reg_zero, &where); | |
2593 | ||
2594 | if (avr_isr.need_sreg) | |
2595 | { | |
2596 | avr_emit_insn ("pop", treg, &where); | |
2597 | avr_emit_insn ("out", treg, &where); | |
2598 | } | |
2599 | ||
2600 | avr_emit_insn ("pop", treg, &where); | |
2601 | } | |
2602 | else | |
2603 | abort(); | |
2604 | } /* treg >= 0 */ | |
2605 | ||
2606 | if (ISR_CHUNK_Prologue == fr->fr_subtype | |
2607 | && avr_isr.sym_n_pushed) | |
2608 | { | |
2609 | symbolS *sy = avr_isr.sym_n_pushed; | |
2610 | /* Turn magic `__gcc_isr.n_pushed' into its now known value. */ | |
2611 | ||
2612 | sy->sy_value.X_op = O_constant; | |
2613 | sy->sy_value.X_add_number = n_pushed; | |
2614 | S_SET_SEGMENT (sy, expr_section); | |
2615 | avr_isr.sym_n_pushed = NULL; | |
2616 | } | |
2617 | ||
2618 | /* Turn frag into ordinary code frag of now known size. */ | |
2619 | ||
2620 | fr->fr_var = 0; | |
2621 | fr->fr_fix = (offsetT) (where - fr->fr_literal); | |
2622 | gas_assert (fr->fr_fix <= fr->fr_offset); | |
2623 | fr->fr_offset = 0; | |
2624 | fr->fr_type = rs_fill; | |
2625 | fr->fr_subtype = 0; | |
2626 | } | |
2627 | ||
2628 | ||
2629 | /* Implements `__gcc_isr' pseudo-instruction. For Prologue and Epilogue | |
2630 | chunks, emit a new rs_machine_dependent frag. For Done chunks, traverse | |
2631 | the current segment and patch all rs_machine_dependent frags to become | |
2632 | appropriate rs_fill code frags. If chunks are seen in an odd ordering, | |
2633 | throw an error instead. */ | |
2634 | ||
2635 | static void | |
2636 | avr_gccisr_operands (struct avr_opcodes_s *opcode, char **line) | |
2637 | { | |
2638 | int bad = 0; | |
2639 | int chunk, reg = 0; | |
2640 | char *str = *line; | |
2641 | ||
2642 | gas_assert (avr_opt.have_gccisr); | |
2643 | ||
2644 | /* We only use operands "N" and "r" which don't pop new fix-ups. */ | |
2645 | ||
2646 | /* 1st operand: Which chunk of __gcc_isr: 0...2. */ | |
2647 | ||
2648 | chunk = avr_operand (opcode, -1, "N", &str, NULL); | |
2649 | if (chunk < 0 || chunk > 2) | |
2650 | as_bad (_("%s requires value 0-2 as operand 1"), opcode->name); | |
2651 | ||
2652 | if (ISR_CHUNK_Done == chunk) | |
2653 | { | |
2654 | /* 2nd operand: A register to push / pop. */ | |
2655 | ||
2656 | str = skip_space (str); | |
2657 | if (*str == '\0' || *str++ != ',') | |
2658 | as_bad (_("`,' required")); | |
2659 | else | |
2660 | avr_operand (opcode, -1, "r", &str, ®); | |
2661 | } | |
2662 | ||
2663 | *line = str; | |
2664 | ||
2665 | /* Chunks must follow in a specific order: | |
2666 | - Prologue: Exactly one | |
2667 | - Epilogue: Any number | |
2668 | - Done: Exactly one. */ | |
2669 | bad |= ISR_CHUNK_Prologue == chunk && avr_isr.prev_chunk != ISR_CHUNK_Done; | |
2670 | bad |= ISR_CHUNK_Epilogue == chunk && avr_isr.prev_chunk == ISR_CHUNK_Done; | |
2671 | bad |= ISR_CHUNK_Done == chunk && avr_isr.prev_chunk == ISR_CHUNK_Done; | |
2672 | if (bad) | |
2673 | { | |
2674 | if (avr_isr.file) | |
2675 | as_bad (_("`%s %d' after `%s %d' from %s:%u"), opcode->name, chunk, | |
2676 | opcode->name, avr_isr.prev_chunk, avr_isr.file, avr_isr.line); | |
2677 | else | |
2678 | as_bad (_("`%s %d' but no chunk open yet"), opcode->name, chunk); | |
2679 | } | |
2680 | ||
2681 | if (!had_errors()) | |
2682 | { | |
2683 | /* The longest sequence (prologue) might have up to 6 insns (words): | |
2684 | ||
2685 | push R0 | |
2686 | in R0, SREG | |
2687 | push R0 | |
2688 | push R1 | |
2689 | clr R1 | |
2690 | push Rx | |
2691 | */ | |
2692 | unsigned int size = 2 * 6; | |
2693 | fragS *fr; | |
2694 | ||
2695 | switch (chunk) | |
2696 | { | |
2697 | case ISR_CHUNK_Prologue: | |
2698 | avr_isr.need_reg_tmp = 0; | |
2699 | avr_isr.need_reg_zero = 0; | |
2700 | avr_isr.need_sreg = 0; | |
2701 | avr_isr.sym_n_pushed = NULL; | |
2702 | /* FALLTHRU */ | |
2703 | ||
2704 | case ISR_CHUNK_Epilogue: | |
2705 | /* Emit a new rs_machine_dependent fragment into the fragment chain. | |
2706 | It will be patched and cleaned up once we see the matching | |
2707 | ISR_CHUNK_Done. */ | |
2708 | frag_wane (frag_now); | |
2709 | frag_new (0); | |
2710 | frag_more (size); | |
2711 | ||
2712 | frag_now->fr_var = 1; | |
2713 | frag_now->fr_offset = size; | |
2714 | frag_now->fr_fix = 0; | |
2715 | frag_now->fr_type = rs_machine_dependent; | |
2716 | frag_now->fr_subtype = chunk; | |
2717 | frag_new (size); | |
2718 | break; | |
2719 | ||
2720 | case ISR_CHUNK_Done: | |
2721 | /* Traverse all frags of the current subseg and turn ones of type | |
2722 | rs_machine_dependent into ordinary code as expected by GCC. */ | |
2723 | ||
2724 | for (fr = frchain_now->frch_root; fr; fr = fr->fr_next) | |
2725 | if (fr->fr_type == rs_machine_dependent) | |
2726 | avr_patch_gccisr_frag (fr, reg); | |
2727 | break; | |
2728 | ||
2729 | default: | |
2730 | abort(); | |
2731 | break; | |
2732 | } | |
2733 | } /* !had_errors */ | |
2734 | ||
2735 | avr_isr.prev_chunk = chunk; | |
2736 | avr_isr.file = as_where (&avr_isr.line); | |
2737 | } | |
2738 | ||
2739 | ||
2740 | /* Callback used by the function below. Diagnose any dangling stuff from | |
2741 | `__gcc_isr', i.e. frags of type rs_machine_dependent. Such frags should | |
2742 | have been resolved during parse by ISR_CHUNK_Done. If such a frag is | |
2743 | seen, report an error and turn it into something harmless. */ | |
2744 | ||
2745 | static void | |
2746 | avr_check_gccisr_done (bfd *abfd ATTRIBUTE_UNUSED, | |
2747 | segT section, | |
2748 | void *xxx ATTRIBUTE_UNUSED) | |
2749 | { | |
2750 | segment_info_type *info = seg_info (section); | |
2751 | ||
2752 | if (SEG_NORMAL (section) | |
2753 | /* BFD may have introduced its own sections without using | |
2754 | subseg_new, so it is possible that seg_info is NULL. */ | |
2755 | && info) | |
2756 | { | |
2757 | fragS *fr; | |
2758 | frchainS *frch; | |
2759 | ||
2760 | for (frch = info->frchainP; frch; frch = frch->frch_next) | |
2761 | for (fr = frch->frch_root; fr; fr = fr->fr_next) | |
2762 | if (fr->fr_type == rs_machine_dependent) | |
2763 | { | |
2764 | if (avr_isr.file) | |
2765 | as_bad_where (avr_isr.file, avr_isr.line, | |
2766 | _("dangling `__gcc_isr %d'"), avr_isr.prev_chunk); | |
2767 | else if (!had_errors()) | |
2768 | as_bad (_("dangling `__gcc_isr'")); | |
2769 | ||
2770 | avr_isr.file = NULL; | |
2771 | ||
2772 | /* Avoid Internal errors due to rs_machine_dependent in the | |
2773 | remainder: Turn frag into something harmless. */ | |
2774 | fr->fr_var = 0; | |
2775 | fr->fr_fix = 0; | |
2776 | fr->fr_offset = 0; | |
2777 | fr->fr_type = rs_fill; | |
2778 | fr->fr_subtype = 0; | |
2779 | } | |
2780 | } | |
2781 | } | |
2782 | ||
2783 | ||
2784 | /* Implement `md_pre_output_hook' */ | |
2785 | /* Run over all relevant sections and diagnose any dangling `__gcc_isr'. | |
2786 | This runs after parsing all inputs but before relaxing and writing. */ | |
2787 | ||
2788 | void | |
2789 | avr_pre_output_hook (void) | |
2790 | { | |
2791 | if (avr_opt.have_gccisr) | |
2792 | bfd_map_over_sections (stdoutput, avr_check_gccisr_done, NULL); | |
2793 | } |