1 /* tc-avr.c -- Assembler code for the ATMEL AVR
3 Copyright 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
5 Contributed by Denis Chertykov <denisc@overta.ru>
7 This file is part of GAS, the GNU Assembler.
9 GAS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GAS is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GAS; see the file COPYING. If not, write to
21 the Free Software Foundation, 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
25 #include "safe-ctype.h"
32 int insn_size
; /* In words. */
34 unsigned int bin_opcode
;
37 #define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
38 {#NAME, CONSTR, SIZE, ISA, BIN},
40 struct avr_opcodes_s avr_opcodes
[] =
42 #include "opcode/avr.h"
46 const char comment_chars
[] = ";";
47 const char line_comment_chars
[] = "#";
48 const char line_separator_chars
[] = "$";
50 const char *md_shortopts
= "m:";
58 /* XXX - devices that don't seem to exist (renamed, replaced with larger
59 ones, or planned but never produced), left here for compatibility. */
61 static struct mcu_type_s mcu_types
[] =
63 {"avr1", AVR_ISA_AVR1
, bfd_mach_avr1
},
64 /* TODO: insruction set for avr2 architecture should be AVR_ISA_AVR2,
65 but set to AVR_ISA_AVR25 for some following version
66 of GCC (from 4.3) for backward compatibility. */
67 {"avr2", AVR_ISA_AVR25
, bfd_mach_avr2
},
68 {"avr25", AVR_ISA_AVR25
, bfd_mach_avr25
},
69 /* TODO: insruction set for avr3 architecture should be AVR_ISA_AVR3,
70 but set to AVR_ISA_AVR3_ALL for some following version
71 of GCC (from 4.3) for backward compatibility. */
72 {"avr3", AVR_ISA_AVR3_ALL
, bfd_mach_avr3
},
73 {"avr31", AVR_ISA_AVR31
, bfd_mach_avr31
},
74 {"avr35", AVR_ISA_AVR35
, bfd_mach_avr35
},
75 {"avr4", AVR_ISA_AVR4
, bfd_mach_avr4
},
76 /* TODO: insruction set for avr5 architecture should be AVR_ISA_AVR5,
77 but set to AVR_ISA_AVR51 for some following version
78 of GCC (from 4.3) for backward compatibility. */
79 {"avr5", AVR_ISA_AVR51
, bfd_mach_avr5
},
80 {"avr51", AVR_ISA_AVR51
, bfd_mach_avr51
},
81 {"avr6", AVR_ISA_AVR6
, bfd_mach_avr6
},
82 {"at90s1200", AVR_ISA_1200
, bfd_mach_avr1
},
83 {"attiny11", AVR_ISA_AVR1
, bfd_mach_avr1
},
84 {"attiny12", AVR_ISA_AVR1
, bfd_mach_avr1
},
85 {"attiny15", AVR_ISA_AVR1
, bfd_mach_avr1
},
86 {"attiny28", AVR_ISA_AVR1
, bfd_mach_avr1
},
87 {"at90s2313", AVR_ISA_AVR2
, bfd_mach_avr2
},
88 {"at90s2323", AVR_ISA_AVR2
, bfd_mach_avr2
},
89 {"at90s2333", AVR_ISA_AVR2
, bfd_mach_avr2
}, /* XXX -> 4433 */
90 {"at90s2343", AVR_ISA_AVR2
, bfd_mach_avr2
},
91 {"attiny22", AVR_ISA_AVR2
, bfd_mach_avr2
}, /* XXX -> 2343 */
92 {"attiny26", AVR_ISA_2xxe
, bfd_mach_avr2
},
93 {"at90s4414", AVR_ISA_AVR2
, bfd_mach_avr2
}, /* XXX -> 8515 */
94 {"at90s4433", AVR_ISA_AVR2
, bfd_mach_avr2
},
95 {"at90s4434", AVR_ISA_AVR2
, bfd_mach_avr2
}, /* XXX -> 8535 */
96 {"at90s8515", AVR_ISA_AVR2
, bfd_mach_avr2
},
97 {"at90c8534", AVR_ISA_AVR2
, bfd_mach_avr2
},
98 {"at90s8535", AVR_ISA_AVR2
, bfd_mach_avr2
},
99 {"attiny13", AVR_ISA_AVR25
, bfd_mach_avr25
},
100 {"attiny13a", AVR_ISA_AVR25
, bfd_mach_avr25
},
101 {"attiny2313", AVR_ISA_AVR25
, bfd_mach_avr25
},
102 {"attiny24", AVR_ISA_AVR25
, bfd_mach_avr25
},
103 {"attiny44", AVR_ISA_AVR25
, bfd_mach_avr25
},
104 {"attiny84", AVR_ISA_AVR25
, bfd_mach_avr25
},
105 {"attiny25", AVR_ISA_AVR25
, bfd_mach_avr25
},
106 {"attiny45", AVR_ISA_AVR25
, bfd_mach_avr25
},
107 {"attiny85", AVR_ISA_AVR25
, bfd_mach_avr25
},
108 {"attiny261", AVR_ISA_AVR25
, bfd_mach_avr25
},
109 {"attiny461", AVR_ISA_AVR25
, bfd_mach_avr25
},
110 {"attiny861", AVR_ISA_AVR25
, bfd_mach_avr25
},
111 {"attiny87", AVR_ISA_AVR25
, bfd_mach_avr25
},
112 {"attiny43u", AVR_ISA_AVR25
, bfd_mach_avr25
},
113 {"attiny48", AVR_ISA_AVR25
, bfd_mach_avr25
},
114 {"attiny88", AVR_ISA_AVR25
, bfd_mach_avr25
},
115 {"at86rf401", AVR_ISA_RF401
, bfd_mach_avr25
},
116 {"at43usb355", AVR_ISA_AVR3
, bfd_mach_avr3
},
117 {"at76c711", AVR_ISA_AVR3
, bfd_mach_avr3
},
118 {"atmega103", AVR_ISA_AVR31
, bfd_mach_avr31
},
119 {"at43usb320", AVR_ISA_AVR31
, bfd_mach_avr31
},
120 {"attiny167", AVR_ISA_AVR35
, bfd_mach_avr35
},
121 {"attiny327", AVR_ISA_AVR35
, bfd_mach_avr35
},
122 {"at90usb82", AVR_ISA_AVR35
, bfd_mach_avr35
},
123 {"at90usb162", AVR_ISA_AVR35
, bfd_mach_avr35
},
124 {"atmega8", AVR_ISA_M8
, bfd_mach_avr4
},
125 {"atmega48", AVR_ISA_AVR4
, bfd_mach_avr4
},
126 {"atmega48p", AVR_ISA_AVR4
, bfd_mach_avr4
},
127 {"atmega88", AVR_ISA_AVR4
, bfd_mach_avr4
},
128 {"atmega88p", AVR_ISA_AVR4
, bfd_mach_avr4
},
129 {"atmega8515", AVR_ISA_M8
, bfd_mach_avr4
},
130 {"atmega8535", AVR_ISA_M8
, bfd_mach_avr4
},
131 {"atmega8hva", AVR_ISA_AVR4
, bfd_mach_avr4
},
132 {"atmega4hvd", AVR_ISA_AVR4
, bfd_mach_avr4
},
133 {"atmega8hvd", AVR_ISA_AVR4
, bfd_mach_avr4
},
134 {"at90pwm1", AVR_ISA_AVR4
, bfd_mach_avr4
},
135 {"at90pwm2", AVR_ISA_AVR4
, bfd_mach_avr4
},
136 {"at90pwm2b", AVR_ISA_AVR4
, bfd_mach_avr4
},
137 {"at90pwm3", AVR_ISA_AVR4
, bfd_mach_avr4
},
138 {"at90pwm3b", AVR_ISA_AVR4
, bfd_mach_avr4
},
139 {"at90pwm81", AVR_ISA_AVR4
, bfd_mach_avr4
},
140 {"atmega16", AVR_ISA_AVR5
, bfd_mach_avr5
},
141 {"atmega161", AVR_ISA_M161
, bfd_mach_avr5
},
142 {"atmega162", AVR_ISA_AVR5
, bfd_mach_avr5
},
143 {"atmega163", AVR_ISA_M161
, bfd_mach_avr5
},
144 {"atmega164p", AVR_ISA_AVR5
, bfd_mach_avr5
},
145 {"atmega165", AVR_ISA_AVR5
, bfd_mach_avr5
},
146 {"atmega165p", AVR_ISA_AVR5
, bfd_mach_avr5
},
147 {"atmega168", AVR_ISA_AVR5
, bfd_mach_avr5
},
148 {"atmega168p", AVR_ISA_AVR5
, bfd_mach_avr5
},
149 {"atmega169", AVR_ISA_AVR5
, bfd_mach_avr5
},
150 {"atmega169p", AVR_ISA_AVR5
, bfd_mach_avr5
},
151 {"atmega32", AVR_ISA_AVR5
, bfd_mach_avr5
},
152 {"atmega323", AVR_ISA_AVR5
, bfd_mach_avr5
},
153 {"atmega324p", AVR_ISA_AVR5
, bfd_mach_avr5
},
154 {"atmega325", AVR_ISA_AVR5
, bfd_mach_avr5
},
155 {"atmega325p", AVR_ISA_AVR5
, bfd_mach_avr5
},
156 {"atmega3250", AVR_ISA_AVR5
, bfd_mach_avr5
},
157 {"atmega3250p",AVR_ISA_AVR5
, bfd_mach_avr5
},
158 {"atmega328p", AVR_ISA_AVR5
, bfd_mach_avr5
},
159 {"atmega329", AVR_ISA_AVR5
, bfd_mach_avr5
},
160 {"atmega329p", AVR_ISA_AVR5
, bfd_mach_avr5
},
161 {"atmega3290", AVR_ISA_AVR5
, bfd_mach_avr5
},
162 {"atmega3290p",AVR_ISA_AVR5
, bfd_mach_avr5
},
163 {"atmega406", AVR_ISA_AVR5
, bfd_mach_avr5
},
164 {"atmega64", AVR_ISA_AVR5
, bfd_mach_avr5
},
165 {"atmega640", AVR_ISA_AVR5
, bfd_mach_avr5
},
166 {"atmega644", AVR_ISA_AVR5
, bfd_mach_avr5
},
167 {"atmega644p", AVR_ISA_AVR5
, bfd_mach_avr5
},
168 {"atmega645", AVR_ISA_AVR5
, bfd_mach_avr5
},
169 {"atmega649", AVR_ISA_AVR5
, bfd_mach_avr5
},
170 {"atmega6450", AVR_ISA_AVR5
, bfd_mach_avr5
},
171 {"atmega6490", AVR_ISA_AVR5
, bfd_mach_avr5
},
172 {"atmega16hva",AVR_ISA_AVR5
, bfd_mach_avr5
},
173 {"atmega16hvb",AVR_ISA_AVR5
, bfd_mach_avr5
},
174 {"atmega32hvb",AVR_ISA_AVR5
, bfd_mach_avr5
},
175 {"at90can32" , AVR_ISA_AVR5
, bfd_mach_avr5
},
176 {"at90can64" , AVR_ISA_AVR5
, bfd_mach_avr5
},
177 {"at90pwm216", AVR_ISA_AVR5
, bfd_mach_avr5
},
178 {"at90pwm316", AVR_ISA_AVR5
, bfd_mach_avr5
},
179 {"atmega32c1", AVR_ISA_AVR5
, bfd_mach_avr5
},
180 {"atmega64c1", AVR_ISA_AVR5
, bfd_mach_avr5
},
181 {"atmega16m1", AVR_ISA_AVR5
, bfd_mach_avr5
},
182 {"atmega32m1", AVR_ISA_AVR5
, bfd_mach_avr5
},
183 {"atmega64m1", AVR_ISA_AVR5
, bfd_mach_avr5
},
184 {"atmega16u4", AVR_ISA_AVR5
, bfd_mach_avr5
},
185 {"atmega32u4", AVR_ISA_AVR5
, bfd_mach_avr5
},
186 {"atmega32u6", AVR_ISA_AVR5
, bfd_mach_avr5
},
187 {"at90usb646", AVR_ISA_AVR5
, bfd_mach_avr5
},
188 {"at90usb647", AVR_ISA_AVR5
, bfd_mach_avr5
},
189 {"at90scr100", AVR_ISA_AVR5
, bfd_mach_avr5
},
190 {"at94k", AVR_ISA_94K
, bfd_mach_avr5
},
191 {"atmega128", AVR_ISA_AVR51
, bfd_mach_avr51
},
192 {"atmega1280", AVR_ISA_AVR51
, bfd_mach_avr51
},
193 {"atmega1281", AVR_ISA_AVR51
, bfd_mach_avr51
},
194 {"atmega1284p",AVR_ISA_AVR51
, bfd_mach_avr51
},
195 {"atmega128rfa",AVR_ISA_AVR51
, bfd_mach_avr51
},
196 {"at90can128", AVR_ISA_AVR51
, bfd_mach_avr51
},
197 {"at90usb1286",AVR_ISA_AVR51
, bfd_mach_avr51
},
198 {"at90usb1287",AVR_ISA_AVR51
, bfd_mach_avr51
},
199 {"m3000f", AVR_ISA_AVR51
, bfd_mach_avr51
},
200 {"m3000s", AVR_ISA_AVR51
, bfd_mach_avr51
},
201 {"m3001b", AVR_ISA_AVR51
, bfd_mach_avr51
},
202 {"atmega2560", AVR_ISA_AVR6
, bfd_mach_avr6
},
203 {"atmega2561", AVR_ISA_AVR6
, bfd_mach_avr6
},
207 /* Current MCU type. */
208 static struct mcu_type_s default_mcu
= {"avr2", AVR_ISA_AVR2
, bfd_mach_avr2
};
209 static struct mcu_type_s
* avr_mcu
= & default_mcu
;
211 /* AVR target-specific switches. */
214 int all_opcodes
; /* -mall-opcodes: accept all known AVR opcodes. */
215 int no_skip_bug
; /* -mno-skip-bug: no warnings for skipping 2-word insns. */
216 int no_wrap
; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around. */
219 static struct avr_opt_s avr_opt
= { 0, 0, 0 };
221 const char EXP_CHARS
[] = "eE";
222 const char FLT_CHARS
[] = "dD";
224 static void avr_set_arch (int);
226 /* The target specific pseudo-ops which we support. */
227 const pseudo_typeS md_pseudo_table
[] =
229 {"arch", avr_set_arch
, 0},
233 #define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
235 #define EXP_MOD_NAME(i) exp_mod[i].name
236 #define EXP_MOD_RELOC(i) exp_mod[i].reloc
237 #define EXP_MOD_NEG_RELOC(i) exp_mod[i].neg_reloc
238 #define HAVE_PM_P(i) exp_mod[i].have_pm
243 bfd_reloc_code_real_type reloc
;
244 bfd_reloc_code_real_type neg_reloc
;
248 static struct exp_mod_s exp_mod
[] =
250 {"hh8", BFD_RELOC_AVR_HH8_LDI
, BFD_RELOC_AVR_HH8_LDI_NEG
, 1},
251 {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM
, BFD_RELOC_AVR_HH8_LDI_PM_NEG
, 0},
252 {"hi8", BFD_RELOC_AVR_HI8_LDI
, BFD_RELOC_AVR_HI8_LDI_NEG
, 1},
253 {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM
, BFD_RELOC_AVR_HI8_LDI_PM_NEG
, 0},
254 {"lo8", BFD_RELOC_AVR_LO8_LDI
, BFD_RELOC_AVR_LO8_LDI_NEG
, 1},
255 {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM
, BFD_RELOC_AVR_LO8_LDI_PM_NEG
, 0},
256 {"hlo8", BFD_RELOC_AVR_HH8_LDI
, BFD_RELOC_AVR_HH8_LDI_NEG
, 0},
257 {"hhi8", BFD_RELOC_AVR_MS8_LDI
, BFD_RELOC_AVR_MS8_LDI_NEG
, 0},
260 /* A union used to store indicies into the exp_mod[] array
261 in a hash table which expects void * data types. */
268 /* Opcode hash table. */
269 static struct hash_control
*avr_hash
;
271 /* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
272 static struct hash_control
*avr_mod_hash
;
274 #define OPTION_MMCU 'm'
277 OPTION_ALL_OPCODES
= OPTION_MD_BASE
+ 1,
282 struct option md_longopts
[] =
284 { "mmcu", required_argument
, NULL
, OPTION_MMCU
},
285 { "mall-opcodes", no_argument
, NULL
, OPTION_ALL_OPCODES
},
286 { "mno-skip-bug", no_argument
, NULL
, OPTION_NO_SKIP_BUG
},
287 { "mno-wrap", no_argument
, NULL
, OPTION_NO_WRAP
},
288 { NULL
, no_argument
, NULL
, 0 }
291 size_t md_longopts_size
= sizeof (md_longopts
);
293 /* Display nicely formatted list of known MCU names. */
296 show_mcu_list (FILE *stream
)
300 fprintf (stream
, _("Known MCU names:"));
303 for (i
= 0; mcu_types
[i
].name
; i
++)
305 int len
= strlen (mcu_types
[i
].name
);
310 fprintf (stream
, " %s", mcu_types
[i
].name
);
313 fprintf (stream
, "\n %s", mcu_types
[i
].name
);
318 fprintf (stream
, "\n");
324 while (*s
== ' ' || *s
== '\t')
329 /* Extract one word from FROM and copy it to TO. */
332 extract_word (char *from
, char *to
, int limit
)
338 /* Drop leading whitespace. */
339 from
= skip_space (from
);
342 /* Find the op code end. */
343 for (op_start
= op_end
= from
; *op_end
!= 0 && is_part_of_name (*op_end
);)
345 to
[size
++] = *op_end
++;
346 if (size
+ 1 >= limit
)
355 md_estimate_size_before_relax (fragS
*fragp ATTRIBUTE_UNUSED
,
356 asection
*seg ATTRIBUTE_UNUSED
)
363 md_show_usage (FILE *stream
)
367 " -mmcu=[avr-name] select microcontroller variant\n"
368 " [avr-name] can be:\n"
369 " avr1 - classic AVR core without data RAM\n"
370 " avr2 - classic AVR core with up to 8K program memory\n"
371 " avr25 - classic AVR core with up to 8K program memory\n"
372 " plus the MOVW instruction\n"
373 " avr3 - classic AVR core with up to 64K program memory\n"
374 " avr31 - classic AVR core with up to 128K program memory\n"
375 " avr35 - classic AVR core with up to 64K program memory\n"
376 " plus the MOVW instruction\n"
377 " avr4 - enhanced AVR core with up to 8K program memory\n"
378 " avr5 - enhanced AVR core with up to 64K program memory\n"
379 " avr51 - enhanced AVR core with up to 128K program memory\n"
380 " avr6 - enhanced AVR core with up to 256K program memory\n"
381 " or immediate microcontroller name.\n"));
383 _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n"
384 " -mno-skip-bug disable warnings for skipping two-word instructions\n"
385 " (default for avr4, avr5)\n"
386 " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n"
387 " (default for avr3, avr5)\n"));
388 show_mcu_list (stream
);
392 avr_set_arch (int dummy ATTRIBUTE_UNUSED
)
396 input_line_pointer
= extract_word (input_line_pointer
, str
, 20);
397 md_parse_option (OPTION_MMCU
, str
);
398 bfd_set_arch_mach (stdoutput
, TARGET_ARCH
, avr_mcu
->mach
);
402 md_parse_option (int c
, char *arg
)
409 char *s
= alloca (strlen (arg
) + 1);
416 *t
= TOLOWER (*arg1
++);
420 for (i
= 0; mcu_types
[i
].name
; ++i
)
421 if (strcmp (mcu_types
[i
].name
, s
) == 0)
424 if (!mcu_types
[i
].name
)
426 show_mcu_list (stderr
);
427 as_fatal (_("unknown MCU: %s\n"), arg
);
430 /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
431 type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
432 as .arch ... in the asm output at the same time. */
433 if (avr_mcu
== &default_mcu
|| avr_mcu
->mach
== mcu_types
[i
].mach
)
434 avr_mcu
= &mcu_types
[i
];
436 as_fatal (_("redefinition of mcu type `%s' to `%s'"),
437 avr_mcu
->name
, mcu_types
[i
].name
);
440 case OPTION_ALL_OPCODES
:
441 avr_opt
.all_opcodes
= 1;
443 case OPTION_NO_SKIP_BUG
:
444 avr_opt
.no_skip_bug
= 1;
455 md_undefined_symbol (char *name ATTRIBUTE_UNUSED
)
461 md_atof (int type
, char *litP
, int *sizeP
)
463 return ieee_md_atof (type
, litP
, sizeP
, FALSE
);
467 md_convert_frag (bfd
*abfd ATTRIBUTE_UNUSED
,
468 asection
*sec ATTRIBUTE_UNUSED
,
469 fragS
*fragP ATTRIBUTE_UNUSED
)
478 struct avr_opcodes_s
*opcode
;
480 avr_hash
= hash_new ();
482 /* Insert unique names into hash table. This hash table then provides a
483 quick index to the first opcode with a particular name in the opcode
485 for (opcode
= avr_opcodes
; opcode
->name
; opcode
++)
486 hash_insert (avr_hash
, opcode
->name
, (char *) opcode
);
488 avr_mod_hash
= hash_new ();
490 for (i
= 0; i
< ARRAY_SIZE (exp_mod
); ++i
)
495 hash_insert (avr_mod_hash
, EXP_MOD_NAME (i
), m
.ptr
);
498 bfd_set_arch_mach (stdoutput
, TARGET_ARCH
, avr_mcu
->mach
);
501 /* Resolve STR as a constant expression and return the result.
502 If result greater than MAX then error. */
505 avr_get_constant (char *str
, int max
)
509 str
= skip_space (str
);
510 input_line_pointer
= str
;
513 if (ex
.X_op
!= O_constant
)
514 as_bad (_("constant value required"));
516 if (ex
.X_add_number
> max
|| ex
.X_add_number
< 0)
517 as_bad (_("number must be positive and less than %d"), max
+ 1);
519 return ex
.X_add_number
;
522 /* Parse for ldd/std offset. */
525 avr_offset_expression (expressionS
*exp
)
527 char *str
= input_line_pointer
;
532 str
= extract_word (str
, op
, sizeof (op
));
534 input_line_pointer
= tmp
;
537 /* Warn about expressions that fail to use lo8 (). */
538 if (exp
->X_op
== O_constant
)
540 int x
= exp
->X_add_number
;
542 if (x
< -255 || x
> 255)
543 as_warn (_("constant out of 8-bit range: %d"), x
);
547 /* Parse ordinary expression. */
550 parse_exp (char *s
, expressionS
*op
)
552 input_line_pointer
= s
;
554 if (op
->X_op
== O_absent
)
555 as_bad (_("missing operand"));
556 return input_line_pointer
;
559 /* Parse special expressions (needed for LDI command):
564 where xx is: hh, hi, lo. */
566 static bfd_reloc_code_real_type
567 avr_ldi_expression (expressionS
*exp
)
569 char *str
= input_line_pointer
;
573 int linker_stubs_should_be_generated
= 0;
577 str
= extract_word (str
, op
, sizeof (op
));
583 m
.ptr
= hash_find (avr_mod_hash
, op
);
591 str
= skip_space (str
);
595 bfd_reloc_code_real_type reloc_to_return
;
600 if (strncmp ("pm(", str
, 3) == 0
601 || strncmp ("gs(",str
,3) == 0
602 || strncmp ("-(gs(",str
,5) == 0
603 || strncmp ("-(pm(", str
, 5) == 0)
611 as_bad (_("illegal expression"));
613 if (str
[0] == 'g' || str
[2] == 'g')
614 linker_stubs_should_be_generated
= 1;
626 if (*str
== '-' && *(str
+ 1) == '(')
633 input_line_pointer
= str
;
638 if (*input_line_pointer
!= ')')
640 as_bad (_("`)' required"));
643 input_line_pointer
++;
648 neg_p
? EXP_MOD_NEG_RELOC (mod
) : EXP_MOD_RELOC (mod
);
649 if (linker_stubs_should_be_generated
)
651 switch (reloc_to_return
)
653 case BFD_RELOC_AVR_LO8_LDI_PM
:
654 reloc_to_return
= BFD_RELOC_AVR_LO8_LDI_GS
;
656 case BFD_RELOC_AVR_HI8_LDI_PM
:
657 reloc_to_return
= BFD_RELOC_AVR_HI8_LDI_GS
;
661 /* PR 5523: Do not generate a warning here,
662 legitimate code can trigger this case. */
666 return reloc_to_return
;
671 input_line_pointer
= tmp
;
674 /* Warn about expressions that fail to use lo8 (). */
675 if (exp
->X_op
== O_constant
)
677 int x
= exp
->X_add_number
;
679 if (x
< -255 || x
> 255)
680 as_warn (_("constant out of 8-bit range: %d"), x
);
683 return BFD_RELOC_AVR_LDI
;
686 /* Parse one instruction operand.
687 Return operand bitmask. Also fixups can be generated. */
690 avr_operand (struct avr_opcodes_s
*opcode
,
696 unsigned int op_mask
= 0;
697 char *str
= skip_space (*line
);
701 /* Any register operand. */
707 if (*str
== 'r' || *str
== 'R')
711 str
= extract_word (str
, r_name
, sizeof (r_name
));
713 if (ISDIGIT (r_name
[1]))
715 if (r_name
[2] == '\0')
716 op_mask
= r_name
[1] - '0';
717 else if (r_name
[1] != '0'
718 && ISDIGIT (r_name
[2])
719 && r_name
[3] == '\0')
720 op_mask
= (r_name
[1] - '0') * 10 + r_name
[2] - '0';
725 op_mask
= avr_get_constant (str
, 31);
726 str
= input_line_pointer
;
734 if (op_mask
< 16 || op_mask
> 23)
735 as_bad (_("register r16-r23 required"));
741 as_bad (_("register number above 15 required"));
747 as_bad (_("even register number required"));
752 if ((op_mask
& 1) || op_mask
< 24)
753 as_bad (_("register r24, r26, r28 or r30 required"));
754 op_mask
= (op_mask
- 24) >> 1;
759 as_bad (_("register name or number from 0 to 31 required"));
768 str
= skip_space (str
+ 1);
777 as_bad (_("pointer register (X, Y or Z) required"));
779 str
= skip_space (str
+ 1);
784 as_bad (_("cannot both predecrement and postincrement"));
788 /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
789 registers, no predecrement, no postincrement. */
790 if (!avr_opt
.all_opcodes
&& (op_mask
& 0x100F)
791 && !(avr_mcu
->isa
& AVR_ISA_SRAM
))
792 as_bad (_("addressing mode not supported"));
798 as_bad (_("can't predecrement"));
800 if (! (*str
== 'z' || *str
== 'Z'))
801 as_bad (_("pointer register Z required"));
803 str
= skip_space (str
+ 1);
811 /* attiny26 can do "lpm" and "lpm r,Z" but not "lpm r,Z+". */
812 if (!avr_opt
.all_opcodes
813 && (op_mask
& 0x0001)
814 && !(avr_mcu
->isa
& AVR_ISA_MOVW
))
815 as_bad (_("postincrement not supported"));
820 char c
= TOLOWER (*str
++);
825 as_bad (_("pointer register (Y or Z) required"));
826 str
= skip_space (str
);
829 input_line_pointer
= str
;
830 avr_offset_expression (& op_expr
);
831 str
= input_line_pointer
;
832 fix_new_exp (frag_now
, where
, 3,
833 &op_expr
, FALSE
, BFD_RELOC_AVR_6
);
839 str
= parse_exp (str
, &op_expr
);
840 fix_new_exp (frag_now
, where
, opcode
->insn_size
* 2,
841 &op_expr
, FALSE
, BFD_RELOC_AVR_CALL
);
845 str
= parse_exp (str
, &op_expr
);
846 fix_new_exp (frag_now
, where
, opcode
->insn_size
* 2,
847 &op_expr
, TRUE
, BFD_RELOC_AVR_13_PCREL
);
851 str
= parse_exp (str
, &op_expr
);
852 fix_new_exp (frag_now
, where
, opcode
->insn_size
* 2,
853 &op_expr
, TRUE
, BFD_RELOC_AVR_7_PCREL
);
857 str
= parse_exp (str
, &op_expr
);
858 fix_new_exp (frag_now
, where
+ 2, opcode
->insn_size
* 2,
859 &op_expr
, FALSE
, BFD_RELOC_16
);
864 bfd_reloc_code_real_type r_type
;
866 input_line_pointer
= str
;
867 r_type
= avr_ldi_expression (&op_expr
);
868 str
= input_line_pointer
;
869 fix_new_exp (frag_now
, where
, 3,
870 &op_expr
, FALSE
, r_type
);
878 x
= ~avr_get_constant (str
, 255);
879 str
= input_line_pointer
;
880 op_mask
|= (x
& 0xf) | ((x
<< 4) & 0xf00);
885 input_line_pointer
= str
;
886 avr_offset_expression (& op_expr
);
887 str
= input_line_pointer
;
888 fix_new_exp (frag_now
, where
, 3,
889 & op_expr
, FALSE
, BFD_RELOC_AVR_6_ADIW
);
897 x
= avr_get_constant (str
, 7);
898 str
= input_line_pointer
;
909 x
= avr_get_constant (str
, 63);
910 str
= input_line_pointer
;
911 op_mask
|= (x
& 0xf) | ((x
& 0x30) << 5);
919 x
= avr_get_constant (str
, 31);
920 str
= input_line_pointer
;
929 as_bad (_("unknown constraint `%c'"), *op
);
936 /* Parse instruction operands.
937 Return binary opcode. */
940 avr_operands (struct avr_opcodes_s
*opcode
, char **line
)
942 char *op
= opcode
->constraints
;
943 unsigned int bin
= opcode
->bin_opcode
;
944 char *frag
= frag_more (opcode
->insn_size
* 2);
946 int where
= frag
- frag_now
->fr_literal
;
947 static unsigned int prev
= 0; /* Previous opcode. */
949 /* Opcode have operands. */
952 unsigned int reg1
= 0;
953 unsigned int reg2
= 0;
954 int reg1_present
= 0;
955 int reg2_present
= 0;
957 /* Parse first operand. */
958 if (REGISTER_P (*op
))
960 reg1
= avr_operand (opcode
, where
, op
, &str
);
963 /* Parse second operand. */
976 if (REGISTER_P (*op
))
979 str
= skip_space (str
);
981 as_bad (_("`,' required"));
982 str
= skip_space (str
);
984 reg2
= avr_operand (opcode
, where
, op
, &str
);
987 if (reg1_present
&& reg2_present
)
988 reg2
= (reg2
& 0xf) | ((reg2
<< 5) & 0x200);
989 else if (reg2_present
)
997 /* Detect undefined combinations (like ld r31,Z+). */
998 if (!avr_opt
.all_opcodes
&& AVR_UNDEF_P (bin
))
999 as_warn (_("undefined combination of operands"));
1001 if (opcode
->insn_size
== 2)
1003 /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
1004 (AVR core bug, fixed in the newer devices). */
1005 if (!(avr_opt
.no_skip_bug
||
1006 (avr_mcu
->isa
& (AVR_ISA_MUL
| AVR_ISA_MOVW
)))
1007 && AVR_SKIP_P (prev
))
1008 as_warn (_("skipping two-word instruction"));
1010 bfd_putl32 ((bfd_vma
) bin
, frag
);
1013 bfd_putl16 ((bfd_vma
) bin
, frag
);
1020 /* GAS will call this function for each section at the end of the assembly,
1021 to permit the CPU backend to adjust the alignment of a section. */
1024 md_section_align (asection
*seg
, valueT addr
)
1026 int align
= bfd_get_section_alignment (stdoutput
, seg
);
1027 return ((addr
+ (1 << align
) - 1) & (-1 << align
));
1030 /* If you define this macro, it should return the offset between the
1031 address of a PC relative fixup and the position from which the PC
1032 relative adjustment should be made. On many processors, the base
1033 of a PC relative instruction is the next instruction, so this
1034 macro would return the length of an instruction. */
1037 md_pcrel_from_section (fixS
*fixp
, segT sec
)
1039 if (fixp
->fx_addsy
!= (symbolS
*) NULL
1040 && (!S_IS_DEFINED (fixp
->fx_addsy
)
1041 || (S_GET_SEGMENT (fixp
->fx_addsy
) != sec
)))
1044 return fixp
->fx_frag
->fr_address
+ fixp
->fx_where
;
1047 /* GAS will call this for each fixup. It should store the correct
1048 value in the object file. */
1051 md_apply_fix (fixS
*fixP
, valueT
* valP
, segT seg
)
1053 unsigned char *where
;
1057 if (fixP
->fx_addsy
== (symbolS
*) NULL
)
1060 else if (fixP
->fx_pcrel
)
1062 segT s
= S_GET_SEGMENT (fixP
->fx_addsy
);
1064 if (s
== seg
|| s
== absolute_section
)
1066 value
+= S_GET_VALUE (fixP
->fx_addsy
);
1071 /* We don't actually support subtracting a symbol. */
1072 if (fixP
->fx_subsy
!= (symbolS
*) NULL
)
1073 as_bad_where (fixP
->fx_file
, fixP
->fx_line
, _("expression too complex"));
1075 switch (fixP
->fx_r_type
)
1078 fixP
->fx_no_overflow
= 1;
1080 case BFD_RELOC_AVR_7_PCREL
:
1081 case BFD_RELOC_AVR_13_PCREL
:
1084 case BFD_RELOC_AVR_CALL
:
1090 /* Fetch the instruction, insert the fully resolved operand
1091 value, and stuff the instruction back again. */
1092 where
= (unsigned char *) fixP
->fx_frag
->fr_literal
+ fixP
->fx_where
;
1093 insn
= bfd_getl16 (where
);
1095 switch (fixP
->fx_r_type
)
1097 case BFD_RELOC_AVR_7_PCREL
:
1099 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1100 _("odd address operand: %ld"), value
);
1102 /* Instruction addresses are always right-shifted by 1. */
1104 --value
; /* Correct PC. */
1106 if (value
< -64 || value
> 63)
1107 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1108 _("operand out of range: %ld"), value
);
1109 value
= (value
<< 3) & 0x3f8;
1110 bfd_putl16 ((bfd_vma
) (value
| insn
), where
);
1113 case BFD_RELOC_AVR_13_PCREL
:
1115 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1116 _("odd address operand: %ld"), value
);
1118 /* Instruction addresses are always right-shifted by 1. */
1120 --value
; /* Correct PC. */
1122 if (value
< -2048 || value
> 2047)
1124 /* No wrap for devices with >8K of program memory. */
1125 if ((avr_mcu
->isa
& AVR_ISA_MEGA
) || avr_opt
.no_wrap
)
1126 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1127 _("operand out of range: %ld"), value
);
1131 bfd_putl16 ((bfd_vma
) (value
| insn
), where
);
1135 bfd_putl16 ((bfd_vma
) value
, where
);
1139 bfd_putl16 ((bfd_vma
) value
, where
);
1142 case BFD_RELOC_AVR_16_PM
:
1143 bfd_putl16 ((bfd_vma
) (value
>> 1), where
);
1146 case BFD_RELOC_AVR_LDI
:
1148 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1149 _("operand out of range: %ld"), value
);
1150 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
), where
);
1153 case BFD_RELOC_AVR_6
:
1154 if ((value
> 63) || (value
< 0))
1155 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1156 _("operand out of range: %ld"), value
);
1157 bfd_putl16 ((bfd_vma
) insn
| ((value
& 7) | ((value
& (3 << 3)) << 7) | ((value
& (1 << 5)) << 8)), where
);
1160 case BFD_RELOC_AVR_6_ADIW
:
1161 if ((value
> 63) || (value
< 0))
1162 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1163 _("operand out of range: %ld"), value
);
1164 bfd_putl16 ((bfd_vma
) insn
| (value
& 0xf) | ((value
& 0x30) << 2), where
);
1167 case BFD_RELOC_AVR_LO8_LDI
:
1168 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
), where
);
1171 case BFD_RELOC_AVR_HI8_LDI
:
1172 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 8), where
);
1175 case BFD_RELOC_AVR_MS8_LDI
:
1176 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 24), where
);
1179 case BFD_RELOC_AVR_HH8_LDI
:
1180 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 16), where
);
1183 case BFD_RELOC_AVR_LO8_LDI_NEG
:
1184 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
), where
);
1187 case BFD_RELOC_AVR_HI8_LDI_NEG
:
1188 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 8), where
);
1191 case BFD_RELOC_AVR_MS8_LDI_NEG
:
1192 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 24), where
);
1195 case BFD_RELOC_AVR_HH8_LDI_NEG
:
1196 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 16), where
);
1199 case BFD_RELOC_AVR_LO8_LDI_PM
:
1200 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 1), where
);
1203 case BFD_RELOC_AVR_HI8_LDI_PM
:
1204 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 9), where
);
1207 case BFD_RELOC_AVR_HH8_LDI_PM
:
1208 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (value
>> 17), where
);
1211 case BFD_RELOC_AVR_LO8_LDI_PM_NEG
:
1212 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 1), where
);
1215 case BFD_RELOC_AVR_HI8_LDI_PM_NEG
:
1216 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 9), where
);
1219 case BFD_RELOC_AVR_HH8_LDI_PM_NEG
:
1220 bfd_putl16 ((bfd_vma
) insn
| LDI_IMMEDIATE (-value
>> 17), where
);
1223 case BFD_RELOC_AVR_CALL
:
1227 x
= bfd_getl16 (where
);
1229 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1230 _("odd address operand: %ld"), value
);
1232 x
|= ((value
& 0x10000) | ((value
<< 3) & 0x1f00000)) >> 16;
1233 bfd_putl16 ((bfd_vma
) x
, where
);
1234 bfd_putl16 ((bfd_vma
) (value
& 0xffff), where
+ 2);
1239 as_fatal (_("line %d: unknown relocation type: 0x%x"),
1240 fixP
->fx_line
, fixP
->fx_r_type
);
1246 switch (fixP
->fx_r_type
)
1248 case -BFD_RELOC_AVR_HI8_LDI_NEG
:
1249 case -BFD_RELOC_AVR_HI8_LDI
:
1250 case -BFD_RELOC_AVR_LO8_LDI_NEG
:
1251 case -BFD_RELOC_AVR_LO8_LDI
:
1252 as_bad_where (fixP
->fx_file
, fixP
->fx_line
,
1253 _("only constant expression allowed"));
1262 /* GAS will call this to generate a reloc, passing the resulting reloc
1263 to `bfd_install_relocation'. This currently works poorly, as
1264 `bfd_install_relocation' often does the wrong thing, and instances of
1265 `tc_gen_reloc' have been written to work around the problems, which
1266 in turns makes it difficult to fix `bfd_install_relocation'. */
1268 /* If while processing a fixup, a reloc really needs to be created
1269 then it is done here. */
1272 tc_gen_reloc (asection
*seg ATTRIBUTE_UNUSED
,
1277 if (fixp
->fx_addsy
&& fixp
->fx_subsy
)
1281 if ((S_GET_SEGMENT (fixp
->fx_addsy
) != S_GET_SEGMENT (fixp
->fx_subsy
))
1282 || S_GET_SEGMENT (fixp
->fx_addsy
) == undefined_section
)
1284 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
1285 "Difference of symbols in different sections is not supported");
1289 /* We are dealing with two symbols defined in the same section.
1290 Let us fix-up them here. */
1291 value
+= S_GET_VALUE (fixp
->fx_addsy
);
1292 value
-= S_GET_VALUE (fixp
->fx_subsy
);
1294 /* When fx_addsy and fx_subsy both are zero, md_apply_fix
1295 only takes it's second operands for the fixup value. */
1296 fixp
->fx_addsy
= NULL
;
1297 fixp
->fx_subsy
= NULL
;
1298 md_apply_fix (fixp
, (valueT
*) &value
, NULL
);
1303 reloc
= xmalloc (sizeof (arelent
));
1305 reloc
->sym_ptr_ptr
= xmalloc (sizeof (asymbol
*));
1306 *reloc
->sym_ptr_ptr
= symbol_get_bfdsym (fixp
->fx_addsy
);
1308 reloc
->address
= fixp
->fx_frag
->fr_address
+ fixp
->fx_where
;
1309 reloc
->howto
= bfd_reloc_type_lookup (stdoutput
, fixp
->fx_r_type
);
1310 if (reloc
->howto
== (reloc_howto_type
*) NULL
)
1312 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
1313 _("reloc %d not supported by object file format"),
1314 (int) fixp
->fx_r_type
);
1318 if (fixp
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
1319 || fixp
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
1320 reloc
->address
= fixp
->fx_offset
;
1322 reloc
->addend
= fixp
->fx_offset
;
1328 md_assemble (char *str
)
1330 struct avr_opcodes_s
*opcode
;
1333 str
= skip_space (extract_word (str
, op
, sizeof (op
)));
1336 as_bad (_("can't find opcode "));
1338 opcode
= (struct avr_opcodes_s
*) hash_find (avr_hash
, op
);
1342 as_bad (_("unknown opcode `%s'"), op
);
1346 /* Special case for opcodes with optional operands (lpm, elpm) -
1347 version with operands exists in avr_opcodes[] in the next entry. */
1349 if (*str
&& *opcode
->constraints
== '?')
1352 if (!avr_opt
.all_opcodes
&& (opcode
->isa
& avr_mcu
->isa
) != opcode
->isa
)
1353 as_bad (_("illegal opcode %s for mcu %s"), opcode
->name
, avr_mcu
->name
);
1355 /* We used to set input_line_pointer to the result of get_operands,
1356 but that is wrong. Our caller assumes we don't change it. */
1358 char *t
= input_line_pointer
;
1360 avr_operands (opcode
, &str
);
1361 if (*skip_space (str
))
1362 as_bad (_("garbage at end of line"));
1363 input_line_pointer
= t
;
1367 /* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1368 `avr_cons_fix_new'. */
1369 static int exp_mod_pm
= 0;
1371 /* Parse special CONS expression: pm (expression)
1372 or alternatively: gs (expression).
1373 These are used for addressing program memory.
1374 Relocation: BFD_RELOC_AVR_16_PM. */
1377 avr_parse_cons_expression (expressionS
*exp
, int nbytes
)
1383 tmp
= input_line_pointer
= skip_space (input_line_pointer
);
1387 char *pm_name1
= "pm";
1388 char *pm_name2
= "gs";
1389 int len
= strlen (pm_name1
);
1390 /* len must be the same for both pm identifiers. */
1392 if (strncasecmp (input_line_pointer
, pm_name1
, len
) == 0
1393 || strncasecmp (input_line_pointer
, pm_name2
, len
) == 0)
1395 input_line_pointer
= skip_space (input_line_pointer
+ len
);
1397 if (*input_line_pointer
== '(')
1399 input_line_pointer
= skip_space (input_line_pointer
+ 1);
1403 if (*input_line_pointer
== ')')
1404 ++input_line_pointer
;
1407 as_bad (_("`)' required"));
1414 input_line_pointer
= tmp
;
1422 avr_cons_fix_new (fragS
*frag
,
1427 if (exp_mod_pm
== 0)
1430 fix_new_exp (frag
, where
, nbytes
, exp
, FALSE
, BFD_RELOC_16
);
1431 else if (nbytes
== 4)
1432 fix_new_exp (frag
, where
, nbytes
, exp
, FALSE
, BFD_RELOC_32
);
1434 as_bad (_("illegal %srelocation size: %d"), "", nbytes
);
1439 fix_new_exp (frag
, where
, nbytes
, exp
, FALSE
, BFD_RELOC_AVR_16_PM
);
1441 as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes
);