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1 | /* tc-aarch64.c -- Assemble for the AArch64 ISA |
2 | ||
3 | Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc. | |
4 | Contributed by ARM Ltd. | |
5 | ||
6 | This file is part of GAS. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the license, or | |
11 | (at your option) 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 this program; see the file COPYING3. If not, | |
20 | see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "as.h" | |
23 | #include <limits.h> | |
24 | #include <stdarg.h> | |
25 | #include "bfd_stdint.h" | |
26 | #define NO_RELOC 0 | |
27 | #include "safe-ctype.h" | |
28 | #include "subsegs.h" | |
29 | #include "obstack.h" | |
30 | ||
31 | #ifdef OBJ_ELF | |
32 | #include "elf/aarch64.h" | |
33 | #include "dw2gencfi.h" | |
34 | #endif | |
35 | ||
36 | #include "dwarf2dbg.h" | |
37 | ||
38 | /* Types of processor to assemble for. */ | |
39 | #ifndef CPU_DEFAULT | |
40 | #define CPU_DEFAULT AARCH64_ARCH_V8 | |
41 | #endif | |
42 | ||
43 | #define streq(a, b) (strcmp (a, b) == 0) | |
44 | ||
45 | static aarch64_feature_set cpu_variant; | |
46 | ||
47 | /* Variables that we set while parsing command-line options. Once all | |
48 | options have been read we re-process these values to set the real | |
49 | assembly flags. */ | |
50 | static const aarch64_feature_set *mcpu_cpu_opt = NULL; | |
51 | static const aarch64_feature_set *march_cpu_opt = NULL; | |
52 | ||
53 | /* Constants for known architecture features. */ | |
54 | static const aarch64_feature_set cpu_default = CPU_DEFAULT; | |
55 | ||
56 | static const aarch64_feature_set aarch64_arch_any = AARCH64_ANY; | |
57 | static const aarch64_feature_set aarch64_arch_none = AARCH64_ARCH_NONE; | |
58 | ||
59 | #ifdef OBJ_ELF | |
60 | /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
61 | static symbolS *GOT_symbol; | |
62 | #endif | |
63 | ||
64 | enum neon_el_type | |
65 | { | |
66 | NT_invtype = -1, | |
67 | NT_b, | |
68 | NT_h, | |
69 | NT_s, | |
70 | NT_d, | |
71 | NT_q | |
72 | }; | |
73 | ||
74 | /* Bits for DEFINED field in neon_type_el. */ | |
75 | #define NTA_HASTYPE 1 | |
76 | #define NTA_HASINDEX 2 | |
77 | ||
78 | struct neon_type_el | |
79 | { | |
80 | enum neon_el_type type; | |
81 | unsigned char defined; | |
82 | unsigned width; | |
83 | int64_t index; | |
84 | }; | |
85 | ||
86 | #define FIXUP_F_HAS_EXPLICIT_SHIFT 0x00000001 | |
87 | ||
88 | struct reloc | |
89 | { | |
90 | bfd_reloc_code_real_type type; | |
91 | expressionS exp; | |
92 | int pc_rel; | |
93 | enum aarch64_opnd opnd; | |
94 | uint32_t flags; | |
95 | unsigned need_libopcodes_p : 1; | |
96 | }; | |
97 | ||
98 | struct aarch64_instruction | |
99 | { | |
100 | /* libopcodes structure for instruction intermediate representation. */ | |
101 | aarch64_inst base; | |
102 | /* Record assembly errors found during the parsing. */ | |
103 | struct | |
104 | { | |
105 | enum aarch64_operand_error_kind kind; | |
106 | const char *error; | |
107 | } parsing_error; | |
108 | /* The condition that appears in the assembly line. */ | |
109 | int cond; | |
110 | /* Relocation information (including the GAS internal fixup). */ | |
111 | struct reloc reloc; | |
112 | /* Need to generate an immediate in the literal pool. */ | |
113 | unsigned gen_lit_pool : 1; | |
114 | }; | |
115 | ||
116 | typedef struct aarch64_instruction aarch64_instruction; | |
117 | ||
118 | static aarch64_instruction inst; | |
119 | ||
120 | static bfd_boolean parse_operands (char *, const aarch64_opcode *); | |
121 | static bfd_boolean programmer_friendly_fixup (aarch64_instruction *); | |
122 | ||
123 | /* Diagnostics inline function utilites. | |
124 | ||
125 | These are lightweight utlities which should only be called by parse_operands | |
126 | and other parsers. GAS processes each assembly line by parsing it against | |
127 | instruction template(s), in the case of multiple templates (for the same | |
128 | mnemonic name), those templates are tried one by one until one succeeds or | |
129 | all fail. An assembly line may fail a few templates before being | |
130 | successfully parsed; an error saved here in most cases is not a user error | |
131 | but an error indicating the current template is not the right template. | |
132 | Therefore it is very important that errors can be saved at a low cost during | |
133 | the parsing; we don't want to slow down the whole parsing by recording | |
134 | non-user errors in detail. | |
135 | ||
136 | Remember that the objective is to help GAS pick up the most approapriate | |
137 | error message in the case of multiple templates, e.g. FMOV which has 8 | |
138 | templates. */ | |
139 | ||
140 | static inline void | |
141 | clear_error (void) | |
142 | { | |
143 | inst.parsing_error.kind = AARCH64_OPDE_NIL; | |
144 | inst.parsing_error.error = NULL; | |
145 | } | |
146 | ||
147 | static inline bfd_boolean | |
148 | error_p (void) | |
149 | { | |
150 | return inst.parsing_error.kind != AARCH64_OPDE_NIL; | |
151 | } | |
152 | ||
153 | static inline const char * | |
154 | get_error_message (void) | |
155 | { | |
156 | return inst.parsing_error.error; | |
157 | } | |
158 | ||
159 | static inline void | |
160 | set_error_message (const char *error) | |
161 | { | |
162 | inst.parsing_error.error = error; | |
163 | } | |
164 | ||
165 | static inline enum aarch64_operand_error_kind | |
166 | get_error_kind (void) | |
167 | { | |
168 | return inst.parsing_error.kind; | |
169 | } | |
170 | ||
171 | static inline void | |
172 | set_error_kind (enum aarch64_operand_error_kind kind) | |
173 | { | |
174 | inst.parsing_error.kind = kind; | |
175 | } | |
176 | ||
177 | static inline void | |
178 | set_error (enum aarch64_operand_error_kind kind, const char *error) | |
179 | { | |
180 | inst.parsing_error.kind = kind; | |
181 | inst.parsing_error.error = error; | |
182 | } | |
183 | ||
184 | static inline void | |
185 | set_recoverable_error (const char *error) | |
186 | { | |
187 | set_error (AARCH64_OPDE_RECOVERABLE, error); | |
188 | } | |
189 | ||
190 | /* Use the DESC field of the corresponding aarch64_operand entry to compose | |
191 | the error message. */ | |
192 | static inline void | |
193 | set_default_error (void) | |
194 | { | |
195 | set_error (AARCH64_OPDE_SYNTAX_ERROR, NULL); | |
196 | } | |
197 | ||
198 | static inline void | |
199 | set_syntax_error (const char *error) | |
200 | { | |
201 | set_error (AARCH64_OPDE_SYNTAX_ERROR, error); | |
202 | } | |
203 | ||
204 | static inline void | |
205 | set_first_syntax_error (const char *error) | |
206 | { | |
207 | if (! error_p ()) | |
208 | set_error (AARCH64_OPDE_SYNTAX_ERROR, error); | |
209 | } | |
210 | ||
211 | static inline void | |
212 | set_fatal_syntax_error (const char *error) | |
213 | { | |
214 | set_error (AARCH64_OPDE_FATAL_SYNTAX_ERROR, error); | |
215 | } | |
216 | \f | |
217 | /* Number of littlenums required to hold an extended precision number. */ | |
218 | #define MAX_LITTLENUMS 6 | |
219 | ||
220 | /* Return value for certain parsers when the parsing fails; those parsers | |
221 | return the information of the parsed result, e.g. register number, on | |
222 | success. */ | |
223 | #define PARSE_FAIL -1 | |
224 | ||
225 | /* This is an invalid condition code that means no conditional field is | |
226 | present. */ | |
227 | #define COND_ALWAYS 0x10 | |
228 | ||
229 | typedef struct | |
230 | { | |
231 | const char *template; | |
232 | unsigned long value; | |
233 | } asm_barrier_opt; | |
234 | ||
235 | typedef struct | |
236 | { | |
237 | const char *template; | |
238 | uint32_t value; | |
239 | } asm_nzcv; | |
240 | ||
241 | struct reloc_entry | |
242 | { | |
243 | char *name; | |
244 | bfd_reloc_code_real_type reloc; | |
245 | }; | |
246 | ||
247 | /* Structure for a hash table entry for a register. */ | |
248 | typedef struct | |
249 | { | |
250 | const char *name; | |
251 | unsigned char number; | |
252 | unsigned char type; | |
253 | unsigned char builtin; | |
254 | } reg_entry; | |
255 | ||
256 | /* Macros to define the register types and masks for the purpose | |
257 | of parsing. */ | |
258 | ||
259 | #undef AARCH64_REG_TYPES | |
260 | #define AARCH64_REG_TYPES \ | |
261 | BASIC_REG_TYPE(R_32) /* w[0-30] */ \ | |
262 | BASIC_REG_TYPE(R_64) /* x[0-30] */ \ | |
263 | BASIC_REG_TYPE(SP_32) /* wsp */ \ | |
264 | BASIC_REG_TYPE(SP_64) /* sp */ \ | |
265 | BASIC_REG_TYPE(Z_32) /* wzr */ \ | |
266 | BASIC_REG_TYPE(Z_64) /* xzr */ \ | |
267 | BASIC_REG_TYPE(FP_B) /* b[0-31] *//* NOTE: keep FP_[BHSDQ] consecutive! */\ | |
268 | BASIC_REG_TYPE(FP_H) /* h[0-31] */ \ | |
269 | BASIC_REG_TYPE(FP_S) /* s[0-31] */ \ | |
270 | BASIC_REG_TYPE(FP_D) /* d[0-31] */ \ | |
271 | BASIC_REG_TYPE(FP_Q) /* q[0-31] */ \ | |
272 | BASIC_REG_TYPE(CN) /* c[0-7] */ \ | |
273 | BASIC_REG_TYPE(VN) /* v[0-31] */ \ | |
274 | /* Typecheck: any 64-bit int reg (inc SP exc XZR) */ \ | |
275 | MULTI_REG_TYPE(R64_SP, REG_TYPE(R_64) | REG_TYPE(SP_64)) \ | |
276 | /* Typecheck: any int (inc {W}SP inc [WX]ZR) */ \ | |
277 | MULTI_REG_TYPE(R_Z_SP, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
278 | | REG_TYPE(SP_32) | REG_TYPE(SP_64) \ | |
279 | | REG_TYPE(Z_32) | REG_TYPE(Z_64)) \ | |
280 | /* Typecheck: any [BHSDQ]P FP. */ \ | |
281 | MULTI_REG_TYPE(BHSDQ, REG_TYPE(FP_B) | REG_TYPE(FP_H) \ | |
282 | | REG_TYPE(FP_S) | REG_TYPE(FP_D) | REG_TYPE(FP_Q)) \ | |
283 | /* Typecheck: any int or [BHSDQ]P FP or V reg (exc SP inc [WX]ZR) */ \ | |
284 | MULTI_REG_TYPE(R_Z_BHSDQ_V, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
285 | | REG_TYPE(Z_32) | REG_TYPE(Z_64) | REG_TYPE(VN) \ | |
286 | | REG_TYPE(FP_B) | REG_TYPE(FP_H) \ | |
287 | | REG_TYPE(FP_S) | REG_TYPE(FP_D) | REG_TYPE(FP_Q)) \ | |
288 | /* Any integer register; used for error messages only. */ \ | |
289 | MULTI_REG_TYPE(R_N, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
290 | | REG_TYPE(SP_32) | REG_TYPE(SP_64) \ | |
291 | | REG_TYPE(Z_32) | REG_TYPE(Z_64)) \ | |
292 | /* Pseudo type to mark the end of the enumerator sequence. */ \ | |
293 | BASIC_REG_TYPE(MAX) | |
294 | ||
295 | #undef BASIC_REG_TYPE | |
296 | #define BASIC_REG_TYPE(T) REG_TYPE_##T, | |
297 | #undef MULTI_REG_TYPE | |
298 | #define MULTI_REG_TYPE(T,V) BASIC_REG_TYPE(T) | |
299 | ||
300 | /* Register type enumerators. */ | |
301 | typedef enum | |
302 | { | |
303 | /* A list of REG_TYPE_*. */ | |
304 | AARCH64_REG_TYPES | |
305 | } aarch64_reg_type; | |
306 | ||
307 | #undef BASIC_REG_TYPE | |
308 | #define BASIC_REG_TYPE(T) 1 << REG_TYPE_##T, | |
309 | #undef REG_TYPE | |
310 | #define REG_TYPE(T) (1 << REG_TYPE_##T) | |
311 | #undef MULTI_REG_TYPE | |
312 | #define MULTI_REG_TYPE(T,V) V, | |
313 | ||
314 | /* Values indexed by aarch64_reg_type to assist the type checking. */ | |
315 | static const unsigned reg_type_masks[] = | |
316 | { | |
317 | AARCH64_REG_TYPES | |
318 | }; | |
319 | ||
320 | #undef BASIC_REG_TYPE | |
321 | #undef REG_TYPE | |
322 | #undef MULTI_REG_TYPE | |
323 | #undef AARCH64_REG_TYPES | |
324 | ||
325 | /* Diagnostics used when we don't get a register of the expected type. | |
326 | Note: this has to synchronized with aarch64_reg_type definitions | |
327 | above. */ | |
328 | static const char * | |
329 | get_reg_expected_msg (aarch64_reg_type reg_type) | |
330 | { | |
331 | const char *msg; | |
332 | ||
333 | switch (reg_type) | |
334 | { | |
335 | case REG_TYPE_R_32: | |
336 | msg = N_("integer 32-bit register expected"); | |
337 | break; | |
338 | case REG_TYPE_R_64: | |
339 | msg = N_("integer 64-bit register expected"); | |
340 | break; | |
341 | case REG_TYPE_R_N: | |
342 | msg = N_("integer register expected"); | |
343 | break; | |
344 | case REG_TYPE_R_Z_SP: | |
345 | msg = N_("integer, zero or SP register expected"); | |
346 | break; | |
347 | case REG_TYPE_FP_B: | |
348 | msg = N_("8-bit SIMD scalar register expected"); | |
349 | break; | |
350 | case REG_TYPE_FP_H: | |
351 | msg = N_("16-bit SIMD scalar or floating-point half precision " | |
352 | "register expected"); | |
353 | break; | |
354 | case REG_TYPE_FP_S: | |
355 | msg = N_("32-bit SIMD scalar or floating-point single precision " | |
356 | "register expected"); | |
357 | break; | |
358 | case REG_TYPE_FP_D: | |
359 | msg = N_("64-bit SIMD scalar or floating-point double precision " | |
360 | "register expected"); | |
361 | break; | |
362 | case REG_TYPE_FP_Q: | |
363 | msg = N_("128-bit SIMD scalar or floating-point quad precision " | |
364 | "register expected"); | |
365 | break; | |
366 | case REG_TYPE_CN: | |
367 | msg = N_("C0 - C15 expected"); | |
368 | break; | |
369 | case REG_TYPE_R_Z_BHSDQ_V: | |
370 | msg = N_("register expected"); | |
371 | break; | |
372 | case REG_TYPE_BHSDQ: /* any [BHSDQ]P FP */ | |
373 | msg = N_("SIMD scalar or floating-point register expected"); | |
374 | break; | |
375 | case REG_TYPE_VN: /* any V reg */ | |
376 | msg = N_("vector register expected"); | |
377 | break; | |
378 | default: | |
379 | as_fatal (_("invalid register type %d"), reg_type); | |
380 | } | |
381 | return msg; | |
382 | } | |
383 | ||
384 | /* Some well known registers that we refer to directly elsewhere. */ | |
385 | #define REG_SP 31 | |
386 | ||
387 | /* Instructions take 4 bytes in the object file. */ | |
388 | #define INSN_SIZE 4 | |
389 | ||
390 | /* Define some common error messages. */ | |
391 | #define BAD_SP _("SP not allowed here") | |
392 | ||
393 | static struct hash_control *aarch64_ops_hsh; | |
394 | static struct hash_control *aarch64_cond_hsh; | |
395 | static struct hash_control *aarch64_shift_hsh; | |
396 | static struct hash_control *aarch64_sys_regs_hsh; | |
397 | static struct hash_control *aarch64_pstatefield_hsh; | |
398 | static struct hash_control *aarch64_sys_regs_ic_hsh; | |
399 | static struct hash_control *aarch64_sys_regs_dc_hsh; | |
400 | static struct hash_control *aarch64_sys_regs_at_hsh; | |
401 | static struct hash_control *aarch64_sys_regs_tlbi_hsh; | |
402 | static struct hash_control *aarch64_reg_hsh; | |
403 | static struct hash_control *aarch64_barrier_opt_hsh; | |
404 | static struct hash_control *aarch64_nzcv_hsh; | |
405 | static struct hash_control *aarch64_pldop_hsh; | |
406 | ||
407 | /* Stuff needed to resolve the label ambiguity | |
408 | As: | |
409 | ... | |
410 | label: <insn> | |
411 | may differ from: | |
412 | ... | |
413 | label: | |
414 | <insn> */ | |
415 | ||
416 | static symbolS *last_label_seen; | |
417 | ||
418 | /* Literal pool structure. Held on a per-section | |
419 | and per-sub-section basis. */ | |
420 | ||
421 | #define MAX_LITERAL_POOL_SIZE 1024 | |
422 | typedef struct literal_pool | |
423 | { | |
424 | expressionS literals[MAX_LITERAL_POOL_SIZE]; | |
425 | unsigned int next_free_entry; | |
426 | unsigned int id; | |
427 | symbolS *symbol; | |
428 | segT section; | |
429 | subsegT sub_section; | |
430 | int size; | |
431 | struct literal_pool *next; | |
432 | } literal_pool; | |
433 | ||
434 | /* Pointer to a linked list of literal pools. */ | |
435 | static literal_pool *list_of_pools = NULL; | |
436 | \f | |
437 | /* Pure syntax. */ | |
438 | ||
439 | /* This array holds the chars that always start a comment. If the | |
440 | pre-processor is disabled, these aren't very useful. */ | |
441 | const char comment_chars[] = ""; | |
442 | ||
443 | /* This array holds the chars that only start a comment at the beginning of | |
444 | a line. If the line seems to have the form '# 123 filename' | |
445 | .line and .file directives will appear in the pre-processed output. */ | |
446 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
447 | first line of the input file. This is because the compiler outputs | |
448 | #NO_APP at the beginning of its output. */ | |
449 | /* Also note that comments like this one will always work. */ | |
450 | const char line_comment_chars[] = "#"; | |
451 | ||
452 | const char line_separator_chars[] = ";"; | |
453 | ||
454 | /* Chars that can be used to separate mant | |
455 | from exp in floating point numbers. */ | |
456 | const char EXP_CHARS[] = "eE"; | |
457 | ||
458 | /* Chars that mean this number is a floating point constant. */ | |
459 | /* As in 0f12.456 */ | |
460 | /* or 0d1.2345e12 */ | |
461 | ||
462 | const char FLT_CHARS[] = "rRsSfFdDxXeEpP"; | |
463 | ||
464 | /* Prefix character that indicates the start of an immediate value. */ | |
465 | #define is_immediate_prefix(C) ((C) == '#') | |
466 | ||
467 | /* Separator character handling. */ | |
468 | ||
469 | #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0) | |
470 | ||
471 | static inline bfd_boolean | |
472 | skip_past_char (char **str, char c) | |
473 | { | |
474 | if (**str == c) | |
475 | { | |
476 | (*str)++; | |
477 | return TRUE; | |
478 | } | |
479 | else | |
480 | return FALSE; | |
481 | } | |
482 | ||
483 | #define skip_past_comma(str) skip_past_char (str, ',') | |
484 | ||
485 | /* Arithmetic expressions (possibly involving symbols). */ | |
486 | ||
487 | /* Return TRUE if anything in the expression *SP is a bignum. */ | |
488 | ||
489 | static bfd_boolean | |
490 | exp_has_bignum_p (symbolS * sp) | |
491 | { | |
492 | if (symbol_get_value_expression (sp)->X_op == O_big) | |
493 | return TRUE; | |
494 | ||
495 | if (symbol_get_value_expression (sp)->X_add_symbol) | |
496 | { | |
497 | return (exp_has_bignum_p (symbol_get_value_expression (sp)->X_add_symbol) | |
498 | || (symbol_get_value_expression (sp)->X_op_symbol | |
499 | && exp_has_bignum_p (symbol_get_value_expression (sp)-> | |
500 | X_op_symbol))); | |
501 | } | |
502 | ||
503 | return FALSE; | |
504 | } | |
505 | ||
506 | static bfd_boolean in_my_get_expression_p = FALSE; | |
507 | ||
508 | /* Third argument to my_get_expression. */ | |
509 | #define GE_NO_PREFIX 0 | |
510 | #define GE_OPT_PREFIX 1 | |
511 | ||
512 | /* Return TRUE if the string pointed by *STR is successfully parsed | |
513 | as an valid expression; *EP will be filled with the information of | |
514 | such an expression. Otherwise return FALSE. */ | |
515 | ||
516 | static bfd_boolean | |
517 | my_get_expression (expressionS * ep, char **str, int prefix_mode, | |
518 | int reject_absent) | |
519 | { | |
520 | char *save_in; | |
521 | segT seg; | |
522 | int prefix_present_p = 0; | |
523 | ||
524 | switch (prefix_mode) | |
525 | { | |
526 | case GE_NO_PREFIX: | |
527 | break; | |
528 | case GE_OPT_PREFIX: | |
529 | if (is_immediate_prefix (**str)) | |
530 | { | |
531 | (*str)++; | |
532 | prefix_present_p = 1; | |
533 | } | |
534 | break; | |
535 | default: | |
536 | abort (); | |
537 | } | |
538 | ||
539 | memset (ep, 0, sizeof (expressionS)); | |
540 | ||
541 | save_in = input_line_pointer; | |
542 | input_line_pointer = *str; | |
543 | in_my_get_expression_p = TRUE; | |
544 | seg = expression (ep); | |
545 | in_my_get_expression_p = FALSE; | |
546 | ||
547 | if (ep->X_op == O_illegal || (reject_absent && ep->X_op == O_absent)) | |
548 | { | |
549 | /* We found a bad expression in md_operand(). */ | |
550 | *str = input_line_pointer; | |
551 | input_line_pointer = save_in; | |
552 | if (prefix_present_p && ! error_p ()) | |
553 | set_fatal_syntax_error (_("bad expression")); | |
554 | else | |
555 | set_first_syntax_error (_("bad expression")); | |
556 | return FALSE; | |
557 | } | |
558 | ||
559 | #ifdef OBJ_AOUT | |
560 | if (seg != absolute_section | |
561 | && seg != text_section | |
562 | && seg != data_section | |
563 | && seg != bss_section && seg != undefined_section) | |
564 | { | |
565 | set_syntax_error (_("bad segment")); | |
566 | *str = input_line_pointer; | |
567 | input_line_pointer = save_in; | |
568 | return FALSE; | |
569 | } | |
570 | #else | |
571 | (void) seg; | |
572 | #endif | |
573 | ||
574 | /* Get rid of any bignums now, so that we don't generate an error for which | |
575 | we can't establish a line number later on. Big numbers are never valid | |
576 | in instructions, which is where this routine is always called. */ | |
577 | if (ep->X_op == O_big | |
578 | || (ep->X_add_symbol | |
579 | && (exp_has_bignum_p (ep->X_add_symbol) | |
580 | || (ep->X_op_symbol && exp_has_bignum_p (ep->X_op_symbol))))) | |
581 | { | |
582 | if (prefix_present_p && error_p ()) | |
583 | set_fatal_syntax_error (_("invalid constant")); | |
584 | else | |
585 | set_first_syntax_error (_("invalid constant")); | |
586 | *str = input_line_pointer; | |
587 | input_line_pointer = save_in; | |
588 | return FALSE; | |
589 | } | |
590 | ||
591 | *str = input_line_pointer; | |
592 | input_line_pointer = save_in; | |
593 | return TRUE; | |
594 | } | |
595 | ||
596 | /* Turn a string in input_line_pointer into a floating point constant | |
597 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
598 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
599 | returned, or NULL on OK. */ | |
600 | ||
601 | char * | |
602 | md_atof (int type, char *litP, int *sizeP) | |
603 | { | |
604 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
605 | } | |
606 | ||
607 | /* We handle all bad expressions here, so that we can report the faulty | |
608 | instruction in the error message. */ | |
609 | void | |
610 | md_operand (expressionS * exp) | |
611 | { | |
612 | if (in_my_get_expression_p) | |
613 | exp->X_op = O_illegal; | |
614 | } | |
615 | ||
616 | /* Immediate values. */ | |
617 | ||
618 | /* Errors may be set multiple times during parsing or bit encoding | |
619 | (particularly in the Neon bits), but usually the earliest error which is set | |
620 | will be the most meaningful. Avoid overwriting it with later (cascading) | |
621 | errors by calling this function. */ | |
622 | ||
623 | static void | |
624 | first_error (const char *error) | |
625 | { | |
626 | if (! error_p ()) | |
627 | set_syntax_error (error); | |
628 | } | |
629 | ||
630 | /* Similiar to first_error, but this function accepts formatted error | |
631 | message. */ | |
632 | static void | |
633 | first_error_fmt (const char *format, ...) | |
634 | { | |
635 | va_list args; | |
636 | enum | |
637 | { size = 100 }; | |
638 | /* N.B. this single buffer will not cause error messages for different | |
639 | instructions to pollute each other; this is because at the end of | |
640 | processing of each assembly line, error message if any will be | |
641 | collected by as_bad. */ | |
642 | static char buffer[size]; | |
643 | ||
644 | if (! error_p ()) | |
645 | { | |
646 | int ret; | |
647 | va_start (args, format); | |
648 | ret = vsnprintf (buffer, size, format, args); | |
649 | know (ret <= size - 1 && ret >= 0); | |
650 | va_end (args); | |
651 | set_syntax_error (buffer); | |
652 | } | |
653 | } | |
654 | ||
655 | /* Register parsing. */ | |
656 | ||
657 | /* Generic register parser which is called by other specialized | |
658 | register parsers. | |
659 | CCP points to what should be the beginning of a register name. | |
660 | If it is indeed a valid register name, advance CCP over it and | |
661 | return the reg_entry structure; otherwise return NULL. | |
662 | It does not issue diagnostics. */ | |
663 | ||
664 | static reg_entry * | |
665 | parse_reg (char **ccp) | |
666 | { | |
667 | char *start = *ccp; | |
668 | char *p; | |
669 | reg_entry *reg; | |
670 | ||
671 | #ifdef REGISTER_PREFIX | |
672 | if (*start != REGISTER_PREFIX) | |
673 | return NULL; | |
674 | start++; | |
675 | #endif | |
676 | ||
677 | p = start; | |
678 | if (!ISALPHA (*p) || !is_name_beginner (*p)) | |
679 | return NULL; | |
680 | ||
681 | do | |
682 | p++; | |
683 | while (ISALPHA (*p) || ISDIGIT (*p) || *p == '_'); | |
684 | ||
685 | reg = (reg_entry *) hash_find_n (aarch64_reg_hsh, start, p - start); | |
686 | ||
687 | if (!reg) | |
688 | return NULL; | |
689 | ||
690 | *ccp = p; | |
691 | return reg; | |
692 | } | |
693 | ||
694 | /* Return TRUE if REG->TYPE is a valid type of TYPE; otherwise | |
695 | return FALSE. */ | |
696 | static bfd_boolean | |
697 | aarch64_check_reg_type (const reg_entry *reg, aarch64_reg_type type) | |
698 | { | |
699 | if (reg->type == type) | |
700 | return TRUE; | |
701 | ||
702 | switch (type) | |
703 | { | |
704 | case REG_TYPE_R64_SP: /* 64-bit integer reg (inc SP exc XZR). */ | |
705 | case REG_TYPE_R_Z_SP: /* Integer reg (inc {X}SP inc [WX]ZR). */ | |
706 | case REG_TYPE_R_Z_BHSDQ_V: /* Any register apart from Cn. */ | |
707 | case REG_TYPE_BHSDQ: /* Any [BHSDQ]P FP or SIMD scalar register. */ | |
708 | case REG_TYPE_VN: /* Vector register. */ | |
709 | gas_assert (reg->type < REG_TYPE_MAX && type < REG_TYPE_MAX); | |
710 | return ((reg_type_masks[reg->type] & reg_type_masks[type]) | |
711 | == reg_type_masks[reg->type]); | |
712 | default: | |
713 | as_fatal ("unhandled type %d", type); | |
714 | abort (); | |
715 | } | |
716 | } | |
717 | ||
718 | /* Parse a register and return PARSE_FAIL if the register is not of type R_Z_SP. | |
719 | Return the register number otherwise. *ISREG32 is set to one if the | |
720 | register is 32-bit wide; *ISREGZERO is set to one if the register is | |
721 | of type Z_32 or Z_64. | |
722 | Note that this function does not issue any diagnostics. */ | |
723 | ||
724 | static int | |
725 | aarch64_reg_parse_32_64 (char **ccp, int reject_sp, int reject_rz, | |
726 | int *isreg32, int *isregzero) | |
727 | { | |
728 | char *str = *ccp; | |
729 | const reg_entry *reg = parse_reg (&str); | |
730 | ||
731 | if (reg == NULL) | |
732 | return PARSE_FAIL; | |
733 | ||
734 | if (! aarch64_check_reg_type (reg, REG_TYPE_R_Z_SP)) | |
735 | return PARSE_FAIL; | |
736 | ||
737 | switch (reg->type) | |
738 | { | |
739 | case REG_TYPE_SP_32: | |
740 | case REG_TYPE_SP_64: | |
741 | if (reject_sp) | |
742 | return PARSE_FAIL; | |
743 | *isreg32 = reg->type == REG_TYPE_SP_32; | |
744 | *isregzero = 0; | |
745 | break; | |
746 | case REG_TYPE_R_32: | |
747 | case REG_TYPE_R_64: | |
748 | *isreg32 = reg->type == REG_TYPE_R_32; | |
749 | *isregzero = 0; | |
750 | break; | |
751 | case REG_TYPE_Z_32: | |
752 | case REG_TYPE_Z_64: | |
753 | if (reject_rz) | |
754 | return PARSE_FAIL; | |
755 | *isreg32 = reg->type == REG_TYPE_Z_32; | |
756 | *isregzero = 1; | |
757 | break; | |
758 | default: | |
759 | return PARSE_FAIL; | |
760 | } | |
761 | ||
762 | *ccp = str; | |
763 | ||
764 | return reg->number; | |
765 | } | |
766 | ||
767 | /* Parse the qualifier of a SIMD vector register or a SIMD vector element. | |
768 | Fill in *PARSED_TYPE and return TRUE if the parsing succeeds; | |
769 | otherwise return FALSE. | |
770 | ||
771 | Accept only one occurrence of: | |
772 | 8b 16b 4h 8h 2s 4s 1d 2d | |
773 | b h s d q */ | |
774 | static bfd_boolean | |
775 | parse_neon_type_for_operand (struct neon_type_el *parsed_type, char **str) | |
776 | { | |
777 | char *ptr = *str; | |
778 | unsigned width; | |
779 | unsigned element_size; | |
780 | enum neon_el_type type; | |
781 | ||
782 | /* skip '.' */ | |
783 | ptr++; | |
784 | ||
785 | if (!ISDIGIT (*ptr)) | |
786 | { | |
787 | width = 0; | |
788 | goto elt_size; | |
789 | } | |
790 | width = strtoul (ptr, &ptr, 10); | |
791 | if (width != 1 && width != 2 && width != 4 && width != 8 && width != 16) | |
792 | { | |
793 | first_error_fmt (_("bad size %d in vector width specifier"), width); | |
794 | return FALSE; | |
795 | } | |
796 | ||
797 | elt_size: | |
798 | switch (TOLOWER (*ptr)) | |
799 | { | |
800 | case 'b': | |
801 | type = NT_b; | |
802 | element_size = 8; | |
803 | break; | |
804 | case 'h': | |
805 | type = NT_h; | |
806 | element_size = 16; | |
807 | break; | |
808 | case 's': | |
809 | type = NT_s; | |
810 | element_size = 32; | |
811 | break; | |
812 | case 'd': | |
813 | type = NT_d; | |
814 | element_size = 64; | |
815 | break; | |
816 | case 'q': | |
817 | if (width == 1) | |
818 | { | |
819 | type = NT_q; | |
820 | element_size = 128; | |
821 | break; | |
822 | } | |
823 | /* fall through. */ | |
824 | default: | |
825 | if (*ptr != '\0') | |
826 | first_error_fmt (_("unexpected character `%c' in element size"), *ptr); | |
827 | else | |
828 | first_error (_("missing element size")); | |
829 | return FALSE; | |
830 | } | |
831 | if (width != 0 && width * element_size != 64 && width * element_size != 128) | |
832 | { | |
833 | first_error_fmt (_ | |
834 | ("invalid element size %d and vector size combination %c"), | |
835 | width, *ptr); | |
836 | return FALSE; | |
837 | } | |
838 | ptr++; | |
839 | ||
840 | parsed_type->type = type; | |
841 | parsed_type->width = width; | |
842 | ||
843 | *str = ptr; | |
844 | ||
845 | return TRUE; | |
846 | } | |
847 | ||
848 | /* Parse a single type, e.g. ".8b", leading period included. | |
849 | Only applicable to Vn registers. | |
850 | ||
851 | Return TRUE on success; otherwise return FALSE. */ | |
852 | static bfd_boolean | |
853 | parse_neon_operand_type (struct neon_type_el *vectype, char **ccp) | |
854 | { | |
855 | char *str = *ccp; | |
856 | ||
857 | if (*str == '.') | |
858 | { | |
859 | if (! parse_neon_type_for_operand (vectype, &str)) | |
860 | { | |
861 | first_error (_("vector type expected")); | |
862 | return FALSE; | |
863 | } | |
864 | } | |
865 | else | |
866 | return FALSE; | |
867 | ||
868 | *ccp = str; | |
869 | ||
870 | return TRUE; | |
871 | } | |
872 | ||
873 | /* Parse a register of the type TYPE. | |
874 | ||
875 | Return PARSE_FAIL if the string pointed by *CCP is not a valid register | |
876 | name or the parsed register is not of TYPE. | |
877 | ||
878 | Otherwise return the register number, and optionally fill in the actual | |
879 | type of the register in *RTYPE when multiple alternatives were given, and | |
880 | return the register shape and element index information in *TYPEINFO. | |
881 | ||
882 | IN_REG_LIST should be set with TRUE if the caller is parsing a register | |
883 | list. */ | |
884 | ||
885 | static int | |
886 | parse_typed_reg (char **ccp, aarch64_reg_type type, aarch64_reg_type *rtype, | |
887 | struct neon_type_el *typeinfo, bfd_boolean in_reg_list) | |
888 | { | |
889 | char *str = *ccp; | |
890 | const reg_entry *reg = parse_reg (&str); | |
891 | struct neon_type_el atype; | |
892 | struct neon_type_el parsetype; | |
893 | bfd_boolean is_typed_vecreg = FALSE; | |
894 | ||
895 | atype.defined = 0; | |
896 | atype.type = NT_invtype; | |
897 | atype.width = -1; | |
898 | atype.index = 0; | |
899 | ||
900 | if (reg == NULL) | |
901 | { | |
902 | if (typeinfo) | |
903 | *typeinfo = atype; | |
904 | set_default_error (); | |
905 | return PARSE_FAIL; | |
906 | } | |
907 | ||
908 | if (! aarch64_check_reg_type (reg, type)) | |
909 | { | |
910 | DEBUG_TRACE ("reg type check failed"); | |
911 | set_default_error (); | |
912 | return PARSE_FAIL; | |
913 | } | |
914 | type = reg->type; | |
915 | ||
916 | if (type == REG_TYPE_VN | |
917 | && parse_neon_operand_type (&parsetype, &str)) | |
918 | { | |
919 | /* Register if of the form Vn.[bhsdq]. */ | |
920 | is_typed_vecreg = TRUE; | |
921 | ||
922 | if (parsetype.width == 0) | |
923 | /* Expect index. In the new scheme we cannot have | |
924 | Vn.[bhsdq] represent a scalar. Therefore any | |
925 | Vn.[bhsdq] should have an index following it. | |
926 | Except in reglists ofcourse. */ | |
927 | atype.defined |= NTA_HASINDEX; | |
928 | else | |
929 | atype.defined |= NTA_HASTYPE; | |
930 | ||
931 | atype.type = parsetype.type; | |
932 | atype.width = parsetype.width; | |
933 | } | |
934 | ||
935 | if (skip_past_char (&str, '[')) | |
936 | { | |
937 | expressionS exp; | |
938 | ||
939 | /* Reject Sn[index] syntax. */ | |
940 | if (!is_typed_vecreg) | |
941 | { | |
942 | first_error (_("this type of register can't be indexed")); | |
943 | return PARSE_FAIL; | |
944 | } | |
945 | ||
946 | if (in_reg_list == TRUE) | |
947 | { | |
948 | first_error (_("index not allowed inside register list")); | |
949 | return PARSE_FAIL; | |
950 | } | |
951 | ||
952 | atype.defined |= NTA_HASINDEX; | |
953 | ||
954 | my_get_expression (&exp, &str, GE_NO_PREFIX, 1); | |
955 | ||
956 | if (exp.X_op != O_constant) | |
957 | { | |
958 | first_error (_("constant expression required")); | |
959 | return PARSE_FAIL; | |
960 | } | |
961 | ||
962 | if (! skip_past_char (&str, ']')) | |
963 | return PARSE_FAIL; | |
964 | ||
965 | atype.index = exp.X_add_number; | |
966 | } | |
967 | else if (!in_reg_list && (atype.defined & NTA_HASINDEX) != 0) | |
968 | { | |
969 | /* Indexed vector register expected. */ | |
970 | first_error (_("indexed vector register expected")); | |
971 | return PARSE_FAIL; | |
972 | } | |
973 | ||
974 | /* A vector reg Vn should be typed or indexed. */ | |
975 | if (type == REG_TYPE_VN && atype.defined == 0) | |
976 | { | |
977 | first_error (_("invalid use of vector register")); | |
978 | } | |
979 | ||
980 | if (typeinfo) | |
981 | *typeinfo = atype; | |
982 | ||
983 | if (rtype) | |
984 | *rtype = type; | |
985 | ||
986 | *ccp = str; | |
987 | ||
988 | return reg->number; | |
989 | } | |
990 | ||
991 | /* Parse register. | |
992 | ||
993 | Return the register number on success; return PARSE_FAIL otherwise. | |
994 | ||
995 | If RTYPE is not NULL, return in *RTYPE the (possibly restricted) type of | |
996 | the register (e.g. NEON double or quad reg when either has been requested). | |
997 | ||
998 | If this is a NEON vector register with additional type information, fill | |
999 | in the struct pointed to by VECTYPE (if non-NULL). | |
1000 | ||
1001 | This parser does not handle register list. */ | |
1002 | ||
1003 | static int | |
1004 | aarch64_reg_parse (char **ccp, aarch64_reg_type type, | |
1005 | aarch64_reg_type *rtype, struct neon_type_el *vectype) | |
1006 | { | |
1007 | struct neon_type_el atype; | |
1008 | char *str = *ccp; | |
1009 | int reg = parse_typed_reg (&str, type, rtype, &atype, | |
1010 | /*in_reg_list= */ FALSE); | |
1011 | ||
1012 | if (reg == PARSE_FAIL) | |
1013 | return PARSE_FAIL; | |
1014 | ||
1015 | if (vectype) | |
1016 | *vectype = atype; | |
1017 | ||
1018 | *ccp = str; | |
1019 | ||
1020 | return reg; | |
1021 | } | |
1022 | ||
1023 | static inline bfd_boolean | |
1024 | eq_neon_type_el (struct neon_type_el e1, struct neon_type_el e2) | |
1025 | { | |
1026 | return | |
1027 | e1.type == e2.type | |
1028 | && e1.defined == e2.defined | |
1029 | && e1.width == e2.width && e1.index == e2.index; | |
1030 | } | |
1031 | ||
1032 | /* This function parses the NEON register list. On success, it returns | |
1033 | the parsed register list information in the following encoded format: | |
1034 | ||
1035 | bit 18-22 | 13-17 | 7-11 | 2-6 | 0-1 | |
1036 | 4th regno | 3rd regno | 2nd regno | 1st regno | num_of_reg | |
1037 | ||
1038 | The information of the register shape and/or index is returned in | |
1039 | *VECTYPE. | |
1040 | ||
1041 | It returns PARSE_FAIL if the register list is invalid. | |
1042 | ||
1043 | The list contains one to four registers. | |
1044 | Each register can be one of: | |
1045 | <Vt>.<T>[<index>] | |
1046 | <Vt>.<T> | |
1047 | All <T> should be identical. | |
1048 | All <index> should be identical. | |
1049 | There are restrictions on <Vt> numbers which are checked later | |
1050 | (by reg_list_valid_p). */ | |
1051 | ||
1052 | static int | |
1053 | parse_neon_reg_list (char **ccp, struct neon_type_el *vectype) | |
1054 | { | |
1055 | char *str = *ccp; | |
1056 | int nb_regs; | |
1057 | struct neon_type_el typeinfo, typeinfo_first; | |
1058 | int val, val_range; | |
1059 | int in_range; | |
1060 | int ret_val; | |
1061 | int i; | |
1062 | bfd_boolean error = FALSE; | |
1063 | bfd_boolean expect_index = FALSE; | |
1064 | ||
1065 | if (*str != '{') | |
1066 | { | |
1067 | set_syntax_error (_("expecting {")); | |
1068 | return PARSE_FAIL; | |
1069 | } | |
1070 | str++; | |
1071 | ||
1072 | nb_regs = 0; | |
1073 | typeinfo_first.defined = 0; | |
1074 | typeinfo_first.type = NT_invtype; | |
1075 | typeinfo_first.width = -1; | |
1076 | typeinfo_first.index = 0; | |
1077 | ret_val = 0; | |
1078 | val = -1; | |
1079 | val_range = -1; | |
1080 | in_range = 0; | |
1081 | do | |
1082 | { | |
1083 | if (in_range) | |
1084 | { | |
1085 | str++; /* skip over '-' */ | |
1086 | val_range = val; | |
1087 | } | |
1088 | val = parse_typed_reg (&str, REG_TYPE_VN, NULL, &typeinfo, | |
1089 | /*in_reg_list= */ TRUE); | |
1090 | if (val == PARSE_FAIL) | |
1091 | { | |
1092 | set_first_syntax_error (_("invalid vector register in list")); | |
1093 | error = TRUE; | |
1094 | continue; | |
1095 | } | |
1096 | /* reject [bhsd]n */ | |
1097 | if (typeinfo.defined == 0) | |
1098 | { | |
1099 | set_first_syntax_error (_("invalid scalar register in list")); | |
1100 | error = TRUE; | |
1101 | continue; | |
1102 | } | |
1103 | ||
1104 | if (typeinfo.defined & NTA_HASINDEX) | |
1105 | expect_index = TRUE; | |
1106 | ||
1107 | if (in_range) | |
1108 | { | |
1109 | if (val < val_range) | |
1110 | { | |
1111 | set_first_syntax_error | |
1112 | (_("invalid range in vector register list")); | |
1113 | error = TRUE; | |
1114 | } | |
1115 | val_range++; | |
1116 | } | |
1117 | else | |
1118 | { | |
1119 | val_range = val; | |
1120 | if (nb_regs == 0) | |
1121 | typeinfo_first = typeinfo; | |
1122 | else if (! eq_neon_type_el (typeinfo_first, typeinfo)) | |
1123 | { | |
1124 | set_first_syntax_error | |
1125 | (_("type mismatch in vector register list")); | |
1126 | error = TRUE; | |
1127 | } | |
1128 | } | |
1129 | if (! error) | |
1130 | for (i = val_range; i <= val; i++) | |
1131 | { | |
1132 | ret_val |= i << (5 * nb_regs); | |
1133 | nb_regs++; | |
1134 | } | |
1135 | in_range = 0; | |
1136 | } | |
1137 | while (skip_past_comma (&str) || (in_range = 1, *str == '-')); | |
1138 | ||
1139 | skip_whitespace (str); | |
1140 | if (*str != '}') | |
1141 | { | |
1142 | set_first_syntax_error (_("end of vector register list not found")); | |
1143 | error = TRUE; | |
1144 | } | |
1145 | str++; | |
1146 | ||
1147 | skip_whitespace (str); | |
1148 | ||
1149 | if (expect_index) | |
1150 | { | |
1151 | if (skip_past_char (&str, '[')) | |
1152 | { | |
1153 | expressionS exp; | |
1154 | ||
1155 | my_get_expression (&exp, &str, GE_NO_PREFIX, 1); | |
1156 | if (exp.X_op != O_constant) | |
1157 | { | |
1158 | set_first_syntax_error (_("constant expression required.")); | |
1159 | error = TRUE; | |
1160 | } | |
1161 | if (! skip_past_char (&str, ']')) | |
1162 | error = TRUE; | |
1163 | else | |
1164 | typeinfo_first.index = exp.X_add_number; | |
1165 | } | |
1166 | else | |
1167 | { | |
1168 | set_first_syntax_error (_("expected index")); | |
1169 | error = TRUE; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | if (nb_regs > 4) | |
1174 | { | |
1175 | set_first_syntax_error (_("too many registers in vector register list")); | |
1176 | error = TRUE; | |
1177 | } | |
1178 | else if (nb_regs == 0) | |
1179 | { | |
1180 | set_first_syntax_error (_("empty vector register list")); | |
1181 | error = TRUE; | |
1182 | } | |
1183 | ||
1184 | *ccp = str; | |
1185 | if (! error) | |
1186 | *vectype = typeinfo_first; | |
1187 | ||
1188 | return error ? PARSE_FAIL : (ret_val << 2) | (nb_regs - 1); | |
1189 | } | |
1190 | ||
1191 | /* Directives: register aliases. */ | |
1192 | ||
1193 | static reg_entry * | |
1194 | insert_reg_alias (char *str, int number, aarch64_reg_type type) | |
1195 | { | |
1196 | reg_entry *new; | |
1197 | const char *name; | |
1198 | ||
1199 | if ((new = hash_find (aarch64_reg_hsh, str)) != 0) | |
1200 | { | |
1201 | if (new->builtin) | |
1202 | as_warn (_("ignoring attempt to redefine built-in register '%s'"), | |
1203 | str); | |
1204 | ||
1205 | /* Only warn about a redefinition if it's not defined as the | |
1206 | same register. */ | |
1207 | else if (new->number != number || new->type != type) | |
1208 | as_warn (_("ignoring redefinition of register alias '%s'"), str); | |
1209 | ||
1210 | return NULL; | |
1211 | } | |
1212 | ||
1213 | name = xstrdup (str); | |
1214 | new = xmalloc (sizeof (reg_entry)); | |
1215 | ||
1216 | new->name = name; | |
1217 | new->number = number; | |
1218 | new->type = type; | |
1219 | new->builtin = FALSE; | |
1220 | ||
1221 | if (hash_insert (aarch64_reg_hsh, name, (void *) new)) | |
1222 | abort (); | |
1223 | ||
1224 | return new; | |
1225 | } | |
1226 | ||
1227 | /* Look for the .req directive. This is of the form: | |
1228 | ||
1229 | new_register_name .req existing_register_name | |
1230 | ||
1231 | If we find one, or if it looks sufficiently like one that we want to | |
1232 | handle any error here, return TRUE. Otherwise return FALSE. */ | |
1233 | ||
1234 | static bfd_boolean | |
1235 | create_register_alias (char *newname, char *p) | |
1236 | { | |
1237 | const reg_entry *old; | |
1238 | char *oldname, *nbuf; | |
1239 | size_t nlen; | |
1240 | ||
1241 | /* The input scrubber ensures that whitespace after the mnemonic is | |
1242 | collapsed to single spaces. */ | |
1243 | oldname = p; | |
1244 | if (strncmp (oldname, " .req ", 6) != 0) | |
1245 | return FALSE; | |
1246 | ||
1247 | oldname += 6; | |
1248 | if (*oldname == '\0') | |
1249 | return FALSE; | |
1250 | ||
1251 | old = hash_find (aarch64_reg_hsh, oldname); | |
1252 | if (!old) | |
1253 | { | |
1254 | as_warn (_("unknown register '%s' -- .req ignored"), oldname); | |
1255 | return TRUE; | |
1256 | } | |
1257 | ||
1258 | /* If TC_CASE_SENSITIVE is defined, then newname already points to | |
1259 | the desired alias name, and p points to its end. If not, then | |
1260 | the desired alias name is in the global original_case_string. */ | |
1261 | #ifdef TC_CASE_SENSITIVE | |
1262 | nlen = p - newname; | |
1263 | #else | |
1264 | newname = original_case_string; | |
1265 | nlen = strlen (newname); | |
1266 | #endif | |
1267 | ||
1268 | nbuf = alloca (nlen + 1); | |
1269 | memcpy (nbuf, newname, nlen); | |
1270 | nbuf[nlen] = '\0'; | |
1271 | ||
1272 | /* Create aliases under the new name as stated; an all-lowercase | |
1273 | version of the new name; and an all-uppercase version of the new | |
1274 | name. */ | |
1275 | if (insert_reg_alias (nbuf, old->number, old->type) != NULL) | |
1276 | { | |
1277 | for (p = nbuf; *p; p++) | |
1278 | *p = TOUPPER (*p); | |
1279 | ||
1280 | if (strncmp (nbuf, newname, nlen)) | |
1281 | { | |
1282 | /* If this attempt to create an additional alias fails, do not bother | |
1283 | trying to create the all-lower case alias. We will fail and issue | |
1284 | a second, duplicate error message. This situation arises when the | |
1285 | programmer does something like: | |
1286 | foo .req r0 | |
1287 | Foo .req r1 | |
1288 | The second .req creates the "Foo" alias but then fails to create | |
1289 | the artificial FOO alias because it has already been created by the | |
1290 | first .req. */ | |
1291 | if (insert_reg_alias (nbuf, old->number, old->type) == NULL) | |
1292 | return TRUE; | |
1293 | } | |
1294 | ||
1295 | for (p = nbuf; *p; p++) | |
1296 | *p = TOLOWER (*p); | |
1297 | ||
1298 | if (strncmp (nbuf, newname, nlen)) | |
1299 | insert_reg_alias (nbuf, old->number, old->type); | |
1300 | } | |
1301 | ||
1302 | return TRUE; | |
1303 | } | |
1304 | ||
1305 | /* Should never be called, as .req goes between the alias and the | |
1306 | register name, not at the beginning of the line. */ | |
1307 | static void | |
1308 | s_req (int a ATTRIBUTE_UNUSED) | |
1309 | { | |
1310 | as_bad (_("invalid syntax for .req directive")); | |
1311 | } | |
1312 | ||
1313 | /* The .unreq directive deletes an alias which was previously defined | |
1314 | by .req. For example: | |
1315 | ||
1316 | my_alias .req r11 | |
1317 | .unreq my_alias */ | |
1318 | ||
1319 | static void | |
1320 | s_unreq (int a ATTRIBUTE_UNUSED) | |
1321 | { | |
1322 | char *name; | |
1323 | char saved_char; | |
1324 | ||
1325 | name = input_line_pointer; | |
1326 | ||
1327 | while (*input_line_pointer != 0 | |
1328 | && *input_line_pointer != ' ' && *input_line_pointer != '\n') | |
1329 | ++input_line_pointer; | |
1330 | ||
1331 | saved_char = *input_line_pointer; | |
1332 | *input_line_pointer = 0; | |
1333 | ||
1334 | if (!*name) | |
1335 | as_bad (_("invalid syntax for .unreq directive")); | |
1336 | else | |
1337 | { | |
1338 | reg_entry *reg = hash_find (aarch64_reg_hsh, name); | |
1339 | ||
1340 | if (!reg) | |
1341 | as_bad (_("unknown register alias '%s'"), name); | |
1342 | else if (reg->builtin) | |
1343 | as_warn (_("ignoring attempt to undefine built-in register '%s'"), | |
1344 | name); | |
1345 | else | |
1346 | { | |
1347 | char *p; | |
1348 | char *nbuf; | |
1349 | ||
1350 | hash_delete (aarch64_reg_hsh, name, FALSE); | |
1351 | free ((char *) reg->name); | |
1352 | free (reg); | |
1353 | ||
1354 | /* Also locate the all upper case and all lower case versions. | |
1355 | Do not complain if we cannot find one or the other as it | |
1356 | was probably deleted above. */ | |
1357 | ||
1358 | nbuf = strdup (name); | |
1359 | for (p = nbuf; *p; p++) | |
1360 | *p = TOUPPER (*p); | |
1361 | reg = hash_find (aarch64_reg_hsh, nbuf); | |
1362 | if (reg) | |
1363 | { | |
1364 | hash_delete (aarch64_reg_hsh, nbuf, FALSE); | |
1365 | free ((char *) reg->name); | |
1366 | free (reg); | |
1367 | } | |
1368 | ||
1369 | for (p = nbuf; *p; p++) | |
1370 | *p = TOLOWER (*p); | |
1371 | reg = hash_find (aarch64_reg_hsh, nbuf); | |
1372 | if (reg) | |
1373 | { | |
1374 | hash_delete (aarch64_reg_hsh, nbuf, FALSE); | |
1375 | free ((char *) reg->name); | |
1376 | free (reg); | |
1377 | } | |
1378 | ||
1379 | free (nbuf); | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | *input_line_pointer = saved_char; | |
1384 | demand_empty_rest_of_line (); | |
1385 | } | |
1386 | ||
1387 | /* Directives: Instruction set selection. */ | |
1388 | ||
1389 | #ifdef OBJ_ELF | |
1390 | /* This code is to handle mapping symbols as defined in the ARM AArch64 ELF | |
1391 | spec. (See "Mapping symbols", section 4.5.4, ARM AAELF64 version 0.05). | |
1392 | Note that previously, $a and $t has type STT_FUNC (BSF_OBJECT flag), | |
1393 | and $d has type STT_OBJECT (BSF_OBJECT flag). Now all three are untyped. */ | |
1394 | ||
1395 | /* Create a new mapping symbol for the transition to STATE. */ | |
1396 | ||
1397 | static void | |
1398 | make_mapping_symbol (enum mstate state, valueT value, fragS * frag) | |
1399 | { | |
1400 | symbolS *symbolP; | |
1401 | const char *symname; | |
1402 | int type; | |
1403 | ||
1404 | switch (state) | |
1405 | { | |
1406 | case MAP_DATA: | |
1407 | symname = "$d"; | |
1408 | type = BSF_NO_FLAGS; | |
1409 | break; | |
1410 | case MAP_INSN: | |
1411 | symname = "$x"; | |
1412 | type = BSF_NO_FLAGS; | |
1413 | break; | |
1414 | default: | |
1415 | abort (); | |
1416 | } | |
1417 | ||
1418 | symbolP = symbol_new (symname, now_seg, value, frag); | |
1419 | symbol_get_bfdsym (symbolP)->flags |= type | BSF_LOCAL; | |
1420 | ||
1421 | /* Save the mapping symbols for future reference. Also check that | |
1422 | we do not place two mapping symbols at the same offset within a | |
1423 | frag. We'll handle overlap between frags in | |
1424 | check_mapping_symbols. | |
1425 | ||
1426 | If .fill or other data filling directive generates zero sized data, | |
1427 | the mapping symbol for the following code will have the same value | |
1428 | as the one generated for the data filling directive. In this case, | |
1429 | we replace the old symbol with the new one at the same address. */ | |
1430 | if (value == 0) | |
1431 | { | |
1432 | if (frag->tc_frag_data.first_map != NULL) | |
1433 | { | |
1434 | know (S_GET_VALUE (frag->tc_frag_data.first_map) == 0); | |
1435 | symbol_remove (frag->tc_frag_data.first_map, &symbol_rootP, | |
1436 | &symbol_lastP); | |
1437 | } | |
1438 | frag->tc_frag_data.first_map = symbolP; | |
1439 | } | |
1440 | if (frag->tc_frag_data.last_map != NULL) | |
1441 | { | |
1442 | know (S_GET_VALUE (frag->tc_frag_data.last_map) <= | |
1443 | S_GET_VALUE (symbolP)); | |
1444 | if (S_GET_VALUE (frag->tc_frag_data.last_map) == S_GET_VALUE (symbolP)) | |
1445 | symbol_remove (frag->tc_frag_data.last_map, &symbol_rootP, | |
1446 | &symbol_lastP); | |
1447 | } | |
1448 | frag->tc_frag_data.last_map = symbolP; | |
1449 | } | |
1450 | ||
1451 | /* We must sometimes convert a region marked as code to data during | |
1452 | code alignment, if an odd number of bytes have to be padded. The | |
1453 | code mapping symbol is pushed to an aligned address. */ | |
1454 | ||
1455 | static void | |
1456 | insert_data_mapping_symbol (enum mstate state, | |
1457 | valueT value, fragS * frag, offsetT bytes) | |
1458 | { | |
1459 | /* If there was already a mapping symbol, remove it. */ | |
1460 | if (frag->tc_frag_data.last_map != NULL | |
1461 | && S_GET_VALUE (frag->tc_frag_data.last_map) == | |
1462 | frag->fr_address + value) | |
1463 | { | |
1464 | symbolS *symp = frag->tc_frag_data.last_map; | |
1465 | ||
1466 | if (value == 0) | |
1467 | { | |
1468 | know (frag->tc_frag_data.first_map == symp); | |
1469 | frag->tc_frag_data.first_map = NULL; | |
1470 | } | |
1471 | frag->tc_frag_data.last_map = NULL; | |
1472 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1473 | } | |
1474 | ||
1475 | make_mapping_symbol (MAP_DATA, value, frag); | |
1476 | make_mapping_symbol (state, value + bytes, frag); | |
1477 | } | |
1478 | ||
1479 | static void mapping_state_2 (enum mstate state, int max_chars); | |
1480 | ||
1481 | /* Set the mapping state to STATE. Only call this when about to | |
1482 | emit some STATE bytes to the file. */ | |
1483 | ||
1484 | void | |
1485 | mapping_state (enum mstate state) | |
1486 | { | |
1487 | enum mstate mapstate = seg_info (now_seg)->tc_segment_info_data.mapstate; | |
1488 | ||
1489 | #define TRANSITION(from, to) (mapstate == (from) && state == (to)) | |
1490 | ||
1491 | if (mapstate == state) | |
1492 | /* The mapping symbol has already been emitted. | |
1493 | There is nothing else to do. */ | |
1494 | return; | |
1495 | else if (TRANSITION (MAP_UNDEFINED, MAP_DATA)) | |
1496 | /* This case will be evaluated later in the next else. */ | |
1497 | return; | |
1498 | else if (TRANSITION (MAP_UNDEFINED, MAP_INSN)) | |
1499 | { | |
1500 | /* Only add the symbol if the offset is > 0: | |
1501 | if we're at the first frag, check it's size > 0; | |
1502 | if we're not at the first frag, then for sure | |
1503 | the offset is > 0. */ | |
1504 | struct frag *const frag_first = seg_info (now_seg)->frchainP->frch_root; | |
1505 | const int add_symbol = (frag_now != frag_first) | |
1506 | || (frag_now_fix () > 0); | |
1507 | ||
1508 | if (add_symbol) | |
1509 | make_mapping_symbol (MAP_DATA, (valueT) 0, frag_first); | |
1510 | } | |
1511 | ||
1512 | mapping_state_2 (state, 0); | |
1513 | #undef TRANSITION | |
1514 | } | |
1515 | ||
1516 | /* Same as mapping_state, but MAX_CHARS bytes have already been | |
1517 | allocated. Put the mapping symbol that far back. */ | |
1518 | ||
1519 | static void | |
1520 | mapping_state_2 (enum mstate state, int max_chars) | |
1521 | { | |
1522 | enum mstate mapstate = seg_info (now_seg)->tc_segment_info_data.mapstate; | |
1523 | ||
1524 | if (!SEG_NORMAL (now_seg)) | |
1525 | return; | |
1526 | ||
1527 | if (mapstate == state) | |
1528 | /* The mapping symbol has already been emitted. | |
1529 | There is nothing else to do. */ | |
1530 | return; | |
1531 | ||
1532 | seg_info (now_seg)->tc_segment_info_data.mapstate = state; | |
1533 | make_mapping_symbol (state, (valueT) frag_now_fix () - max_chars, frag_now); | |
1534 | } | |
1535 | #else | |
1536 | #define mapping_state(x) /* nothing */ | |
1537 | #define mapping_state_2(x, y) /* nothing */ | |
1538 | #endif | |
1539 | ||
1540 | /* Directives: sectioning and alignment. */ | |
1541 | ||
1542 | static void | |
1543 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
1544 | { | |
1545 | /* We don't support putting frags in the BSS segment, we fake it by | |
1546 | marking in_bss, then looking at s_skip for clues. */ | |
1547 | subseg_set (bss_section, 0); | |
1548 | demand_empty_rest_of_line (); | |
1549 | mapping_state (MAP_DATA); | |
1550 | } | |
1551 | ||
1552 | static void | |
1553 | s_even (int ignore ATTRIBUTE_UNUSED) | |
1554 | { | |
1555 | /* Never make frag if expect extra pass. */ | |
1556 | if (!need_pass_2) | |
1557 | frag_align (1, 0, 0); | |
1558 | ||
1559 | record_alignment (now_seg, 1); | |
1560 | ||
1561 | demand_empty_rest_of_line (); | |
1562 | } | |
1563 | ||
1564 | /* Directives: Literal pools. */ | |
1565 | ||
1566 | static literal_pool * | |
1567 | find_literal_pool (int size) | |
1568 | { | |
1569 | literal_pool *pool; | |
1570 | ||
1571 | for (pool = list_of_pools; pool != NULL; pool = pool->next) | |
1572 | { | |
1573 | if (pool->section == now_seg | |
1574 | && pool->sub_section == now_subseg && pool->size == size) | |
1575 | break; | |
1576 | } | |
1577 | ||
1578 | return pool; | |
1579 | } | |
1580 | ||
1581 | static literal_pool * | |
1582 | find_or_make_literal_pool (int size) | |
1583 | { | |
1584 | /* Next literal pool ID number. */ | |
1585 | static unsigned int latest_pool_num = 1; | |
1586 | literal_pool *pool; | |
1587 | ||
1588 | pool = find_literal_pool (size); | |
1589 | ||
1590 | if (pool == NULL) | |
1591 | { | |
1592 | /* Create a new pool. */ | |
1593 | pool = xmalloc (sizeof (*pool)); | |
1594 | if (!pool) | |
1595 | return NULL; | |
1596 | ||
1597 | /* Currently we always put the literal pool in the current text | |
1598 | section. If we were generating "small" model code where we | |
1599 | knew that all code and initialised data was within 1MB then | |
1600 | we could output literals to mergeable, read-only data | |
1601 | sections. */ | |
1602 | ||
1603 | pool->next_free_entry = 0; | |
1604 | pool->section = now_seg; | |
1605 | pool->sub_section = now_subseg; | |
1606 | pool->size = size; | |
1607 | pool->next = list_of_pools; | |
1608 | pool->symbol = NULL; | |
1609 | ||
1610 | /* Add it to the list. */ | |
1611 | list_of_pools = pool; | |
1612 | } | |
1613 | ||
1614 | /* New pools, and emptied pools, will have a NULL symbol. */ | |
1615 | if (pool->symbol == NULL) | |
1616 | { | |
1617 | pool->symbol = symbol_create (FAKE_LABEL_NAME, undefined_section, | |
1618 | (valueT) 0, &zero_address_frag); | |
1619 | pool->id = latest_pool_num++; | |
1620 | } | |
1621 | ||
1622 | /* Done. */ | |
1623 | return pool; | |
1624 | } | |
1625 | ||
1626 | /* Add the literal of size SIZE in *EXP to the relevant literal pool. | |
1627 | Return TRUE on success, otherwise return FALSE. */ | |
1628 | static bfd_boolean | |
1629 | add_to_lit_pool (expressionS *exp, int size) | |
1630 | { | |
1631 | literal_pool *pool; | |
1632 | unsigned int entry; | |
1633 | ||
1634 | pool = find_or_make_literal_pool (size); | |
1635 | ||
1636 | /* Check if this literal value is already in the pool. */ | |
1637 | for (entry = 0; entry < pool->next_free_entry; entry++) | |
1638 | { | |
1639 | if ((pool->literals[entry].X_op == exp->X_op) | |
1640 | && (exp->X_op == O_constant) | |
1641 | && (pool->literals[entry].X_add_number == exp->X_add_number) | |
1642 | && (pool->literals[entry].X_unsigned == exp->X_unsigned)) | |
1643 | break; | |
1644 | ||
1645 | if ((pool->literals[entry].X_op == exp->X_op) | |
1646 | && (exp->X_op == O_symbol) | |
1647 | && (pool->literals[entry].X_add_number == exp->X_add_number) | |
1648 | && (pool->literals[entry].X_add_symbol == exp->X_add_symbol) | |
1649 | && (pool->literals[entry].X_op_symbol == exp->X_op_symbol)) | |
1650 | break; | |
1651 | } | |
1652 | ||
1653 | /* Do we need to create a new entry? */ | |
1654 | if (entry == pool->next_free_entry) | |
1655 | { | |
1656 | if (entry >= MAX_LITERAL_POOL_SIZE) | |
1657 | { | |
1658 | set_syntax_error (_("literal pool overflow")); | |
1659 | return FALSE; | |
1660 | } | |
1661 | ||
1662 | pool->literals[entry] = *exp; | |
1663 | pool->next_free_entry += 1; | |
1664 | } | |
1665 | ||
1666 | exp->X_op = O_symbol; | |
1667 | exp->X_add_number = ((int) entry) * size; | |
1668 | exp->X_add_symbol = pool->symbol; | |
1669 | ||
1670 | return TRUE; | |
1671 | } | |
1672 | ||
1673 | /* Can't use symbol_new here, so have to create a symbol and then at | |
1674 | a later date assign it a value. Thats what these functions do. */ | |
1675 | ||
1676 | static void | |
1677 | symbol_locate (symbolS * symbolP, | |
1678 | const char *name,/* It is copied, the caller can modify. */ | |
1679 | segT segment, /* Segment identifier (SEG_<something>). */ | |
1680 | valueT valu, /* Symbol value. */ | |
1681 | fragS * frag) /* Associated fragment. */ | |
1682 | { | |
1683 | unsigned int name_length; | |
1684 | char *preserved_copy_of_name; | |
1685 | ||
1686 | name_length = strlen (name) + 1; /* +1 for \0. */ | |
1687 | obstack_grow (¬es, name, name_length); | |
1688 | preserved_copy_of_name = obstack_finish (¬es); | |
1689 | ||
1690 | #ifdef tc_canonicalize_symbol_name | |
1691 | preserved_copy_of_name = | |
1692 | tc_canonicalize_symbol_name (preserved_copy_of_name); | |
1693 | #endif | |
1694 | ||
1695 | S_SET_NAME (symbolP, preserved_copy_of_name); | |
1696 | ||
1697 | S_SET_SEGMENT (symbolP, segment); | |
1698 | S_SET_VALUE (symbolP, valu); | |
1699 | symbol_clear_list_pointers (symbolP); | |
1700 | ||
1701 | symbol_set_frag (symbolP, frag); | |
1702 | ||
1703 | /* Link to end of symbol chain. */ | |
1704 | { | |
1705 | extern int symbol_table_frozen; | |
1706 | ||
1707 | if (symbol_table_frozen) | |
1708 | abort (); | |
1709 | } | |
1710 | ||
1711 | symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); | |
1712 | ||
1713 | obj_symbol_new_hook (symbolP); | |
1714 | ||
1715 | #ifdef tc_symbol_new_hook | |
1716 | tc_symbol_new_hook (symbolP); | |
1717 | #endif | |
1718 | ||
1719 | #ifdef DEBUG_SYMS | |
1720 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
1721 | #endif /* DEBUG_SYMS */ | |
1722 | } | |
1723 | ||
1724 | ||
1725 | static void | |
1726 | s_ltorg (int ignored ATTRIBUTE_UNUSED) | |
1727 | { | |
1728 | unsigned int entry; | |
1729 | literal_pool *pool; | |
1730 | char sym_name[20]; | |
1731 | int align; | |
1732 | ||
1733 | for (align = 2; align < 4; align++) | |
1734 | { | |
1735 | int size = 1 << align; | |
1736 | ||
1737 | pool = find_literal_pool (size); | |
1738 | if (pool == NULL || pool->symbol == NULL || pool->next_free_entry == 0) | |
1739 | continue; | |
1740 | ||
1741 | mapping_state (MAP_DATA); | |
1742 | ||
1743 | /* Align pool as you have word accesses. | |
1744 | Only make a frag if we have to. */ | |
1745 | if (!need_pass_2) | |
1746 | frag_align (align, 0, 0); | |
1747 | ||
1748 | record_alignment (now_seg, align); | |
1749 | ||
1750 | sprintf (sym_name, "$$lit_\002%x", pool->id); | |
1751 | ||
1752 | symbol_locate (pool->symbol, sym_name, now_seg, | |
1753 | (valueT) frag_now_fix (), frag_now); | |
1754 | symbol_table_insert (pool->symbol); | |
1755 | ||
1756 | for (entry = 0; entry < pool->next_free_entry; entry++) | |
1757 | /* First output the expression in the instruction to the pool. */ | |
1758 | emit_expr (&(pool->literals[entry]), size); /* .word|.xword */ | |
1759 | ||
1760 | /* Mark the pool as empty. */ | |
1761 | pool->next_free_entry = 0; | |
1762 | pool->symbol = NULL; | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | #ifdef OBJ_ELF | |
1767 | /* Forward declarations for functions below, in the MD interface | |
1768 | section. */ | |
1769 | static fixS *fix_new_aarch64 (fragS *, int, short, expressionS *, int, int); | |
1770 | static struct reloc_table_entry * find_reloc_table_entry (char **); | |
1771 | ||
1772 | /* Directives: Data. */ | |
1773 | /* N.B. the support for relocation suffix in this directive needs to be | |
1774 | implemented properly. */ | |
1775 | ||
1776 | static void | |
1777 | s_aarch64_elf_cons (int nbytes) | |
1778 | { | |
1779 | expressionS exp; | |
1780 | ||
1781 | #ifdef md_flush_pending_output | |
1782 | md_flush_pending_output (); | |
1783 | #endif | |
1784 | ||
1785 | if (is_it_end_of_statement ()) | |
1786 | { | |
1787 | demand_empty_rest_of_line (); | |
1788 | return; | |
1789 | } | |
1790 | ||
1791 | #ifdef md_cons_align | |
1792 | md_cons_align (nbytes); | |
1793 | #endif | |
1794 | ||
1795 | mapping_state (MAP_DATA); | |
1796 | do | |
1797 | { | |
1798 | struct reloc_table_entry *reloc; | |
1799 | ||
1800 | expression (&exp); | |
1801 | ||
1802 | if (exp.X_op != O_symbol) | |
1803 | emit_expr (&exp, (unsigned int) nbytes); | |
1804 | else | |
1805 | { | |
1806 | skip_past_char (&input_line_pointer, '#'); | |
1807 | if (skip_past_char (&input_line_pointer, ':')) | |
1808 | { | |
1809 | reloc = find_reloc_table_entry (&input_line_pointer); | |
1810 | if (reloc == NULL) | |
1811 | as_bad (_("unrecognized relocation suffix")); | |
1812 | else | |
1813 | as_bad (_("unimplemented relocation suffix")); | |
1814 | ignore_rest_of_line (); | |
1815 | return; | |
1816 | } | |
1817 | else | |
1818 | emit_expr (&exp, (unsigned int) nbytes); | |
1819 | } | |
1820 | } | |
1821 | while (*input_line_pointer++ == ','); | |
1822 | ||
1823 | /* Put terminator back into stream. */ | |
1824 | input_line_pointer--; | |
1825 | demand_empty_rest_of_line (); | |
1826 | } | |
1827 | ||
1828 | #endif /* OBJ_ELF */ | |
1829 | ||
1830 | /* Output a 32-bit word, but mark as an instruction. */ | |
1831 | ||
1832 | static void | |
1833 | s_aarch64_inst (int ignored ATTRIBUTE_UNUSED) | |
1834 | { | |
1835 | expressionS exp; | |
1836 | ||
1837 | #ifdef md_flush_pending_output | |
1838 | md_flush_pending_output (); | |
1839 | #endif | |
1840 | ||
1841 | if (is_it_end_of_statement ()) | |
1842 | { | |
1843 | demand_empty_rest_of_line (); | |
1844 | return; | |
1845 | } | |
1846 | ||
1847 | if (!need_pass_2) | |
1848 | frag_align_code (2, 0); | |
1849 | #ifdef OBJ_ELF | |
1850 | mapping_state (MAP_INSN); | |
1851 | #endif | |
1852 | ||
1853 | do | |
1854 | { | |
1855 | expression (&exp); | |
1856 | if (exp.X_op != O_constant) | |
1857 | { | |
1858 | as_bad (_("constant expression required")); | |
1859 | ignore_rest_of_line (); | |
1860 | return; | |
1861 | } | |
1862 | ||
1863 | if (target_big_endian) | |
1864 | { | |
1865 | unsigned int val = exp.X_add_number; | |
1866 | exp.X_add_number = SWAP_32 (val); | |
1867 | } | |
1868 | emit_expr (&exp, 4); | |
1869 | } | |
1870 | while (*input_line_pointer++ == ','); | |
1871 | ||
1872 | /* Put terminator back into stream. */ | |
1873 | input_line_pointer--; | |
1874 | demand_empty_rest_of_line (); | |
1875 | } | |
1876 | ||
1877 | #ifdef OBJ_ELF | |
1878 | /* Emit BFD_RELOC_AARCH64_TLSDESC_CALL on the next BLR instruction. */ | |
1879 | ||
1880 | static void | |
1881 | s_tlsdesccall (int ignored ATTRIBUTE_UNUSED) | |
1882 | { | |
1883 | expressionS exp; | |
1884 | ||
1885 | /* Since we're just labelling the code, there's no need to define a | |
1886 | mapping symbol. */ | |
1887 | expression (&exp); | |
1888 | /* Make sure there is enough room in this frag for the following | |
1889 | blr. This trick only works if the blr follows immediately after | |
1890 | the .tlsdesc directive. */ | |
1891 | frag_grow (4); | |
1892 | fix_new_aarch64 (frag_now, frag_more (0) - frag_now->fr_literal, 4, &exp, 0, | |
1893 | BFD_RELOC_AARCH64_TLSDESC_CALL); | |
1894 | ||
1895 | demand_empty_rest_of_line (); | |
1896 | } | |
1897 | #endif /* OBJ_ELF */ | |
1898 | ||
1899 | static void s_aarch64_arch (int); | |
1900 | static void s_aarch64_cpu (int); | |
1901 | ||
1902 | /* This table describes all the machine specific pseudo-ops the assembler | |
1903 | has to support. The fields are: | |
1904 | pseudo-op name without dot | |
1905 | function to call to execute this pseudo-op | |
1906 | Integer arg to pass to the function. */ | |
1907 | ||
1908 | const pseudo_typeS md_pseudo_table[] = { | |
1909 | /* Never called because '.req' does not start a line. */ | |
1910 | {"req", s_req, 0}, | |
1911 | {"unreq", s_unreq, 0}, | |
1912 | {"bss", s_bss, 0}, | |
1913 | {"even", s_even, 0}, | |
1914 | {"ltorg", s_ltorg, 0}, | |
1915 | {"pool", s_ltorg, 0}, | |
1916 | {"cpu", s_aarch64_cpu, 0}, | |
1917 | {"arch", s_aarch64_arch, 0}, | |
1918 | {"inst", s_aarch64_inst, 0}, | |
1919 | #ifdef OBJ_ELF | |
1920 | {"tlsdesccall", s_tlsdesccall, 0}, | |
1921 | {"word", s_aarch64_elf_cons, 4}, | |
1922 | {"long", s_aarch64_elf_cons, 4}, | |
1923 | {"xword", s_aarch64_elf_cons, 8}, | |
1924 | {"dword", s_aarch64_elf_cons, 8}, | |
1925 | #endif | |
1926 | {0, 0, 0} | |
1927 | }; | |
1928 | \f | |
1929 | ||
1930 | /* Check whether STR points to a register name followed by a comma or the | |
1931 | end of line; REG_TYPE indicates which register types are checked | |
1932 | against. Return TRUE if STR is such a register name; otherwise return | |
1933 | FALSE. The function does not intend to produce any diagnostics, but since | |
1934 | the register parser aarch64_reg_parse, which is called by this function, | |
1935 | does produce diagnostics, we call clear_error to clear any diagnostics | |
1936 | that may be generated by aarch64_reg_parse. | |
1937 | Also, the function returns FALSE directly if there is any user error | |
1938 | present at the function entry. This prevents the existing diagnostics | |
1939 | state from being spoiled. | |
1940 | The function currently serves parse_constant_immediate and | |
1941 | parse_big_immediate only. */ | |
1942 | static bfd_boolean | |
1943 | reg_name_p (char *str, aarch64_reg_type reg_type) | |
1944 | { | |
1945 | int reg; | |
1946 | ||
1947 | /* Prevent the diagnostics state from being spoiled. */ | |
1948 | if (error_p ()) | |
1949 | return FALSE; | |
1950 | ||
1951 | reg = aarch64_reg_parse (&str, reg_type, NULL, NULL); | |
1952 | ||
1953 | /* Clear the parsing error that may be set by the reg parser. */ | |
1954 | clear_error (); | |
1955 | ||
1956 | if (reg == PARSE_FAIL) | |
1957 | return FALSE; | |
1958 | ||
1959 | skip_whitespace (str); | |
1960 | if (*str == ',' || is_end_of_line[(unsigned int) *str]) | |
1961 | return TRUE; | |
1962 | ||
1963 | return FALSE; | |
1964 | } | |
1965 | ||
1966 | /* Parser functions used exclusively in instruction operands. */ | |
1967 | ||
1968 | /* Parse an immediate expression which may not be constant. | |
1969 | ||
1970 | To prevent the expression parser from pushing a register name | |
1971 | into the symbol table as an undefined symbol, firstly a check is | |
1972 | done to find out whether STR is a valid register name followed | |
1973 | by a comma or the end of line. Return FALSE if STR is such a | |
1974 | string. */ | |
1975 | ||
1976 | static bfd_boolean | |
1977 | parse_immediate_expression (char **str, expressionS *exp) | |
1978 | { | |
1979 | if (reg_name_p (*str, REG_TYPE_R_Z_BHSDQ_V)) | |
1980 | { | |
1981 | set_recoverable_error (_("immediate operand required")); | |
1982 | return FALSE; | |
1983 | } | |
1984 | ||
1985 | my_get_expression (exp, str, GE_OPT_PREFIX, 1); | |
1986 | ||
1987 | if (exp->X_op == O_absent) | |
1988 | { | |
1989 | set_fatal_syntax_error (_("missing immediate expression")); | |
1990 | return FALSE; | |
1991 | } | |
1992 | ||
1993 | return TRUE; | |
1994 | } | |
1995 | ||
1996 | /* Constant immediate-value read function for use in insn parsing. | |
1997 | STR points to the beginning of the immediate (with the optional | |
1998 | leading #); *VAL receives the value. | |
1999 | ||
2000 | Return TRUE on success; otherwise return FALSE. */ | |
2001 | ||
2002 | static bfd_boolean | |
2003 | parse_constant_immediate (char **str, int64_t * val) | |
2004 | { | |
2005 | expressionS exp; | |
2006 | ||
2007 | if (! parse_immediate_expression (str, &exp)) | |
2008 | return FALSE; | |
2009 | ||
2010 | if (exp.X_op != O_constant) | |
2011 | { | |
2012 | set_syntax_error (_("constant expression required")); | |
2013 | return FALSE; | |
2014 | } | |
2015 | ||
2016 | *val = exp.X_add_number; | |
2017 | return TRUE; | |
2018 | } | |
2019 | ||
2020 | static uint32_t | |
2021 | encode_imm_float_bits (uint32_t imm) | |
2022 | { | |
2023 | return ((imm >> 19) & 0x7f) /* b[25:19] -> b[6:0] */ | |
2024 | | ((imm >> (31 - 7)) & 0x80); /* b[31] -> b[7] */ | |
2025 | } | |
2026 | ||
2027 | /* Return TRUE if IMM is a valid floating-point immediate; return FALSE | |
2028 | otherwise. */ | |
2029 | static bfd_boolean | |
2030 | aarch64_imm_float_p (uint32_t imm) | |
2031 | { | |
2032 | /* 3 32222222 2221111111111 | |
2033 | 1 09876543 21098765432109876543210 | |
2034 | n Eeeeeexx xxxx0000000000000000000 */ | |
2035 | uint32_t e; | |
2036 | ||
2037 | e = (imm >> 30) & 0x1; | |
2038 | if (e == 0) | |
2039 | e = 0x3e000000; | |
2040 | else | |
2041 | e = 0x40000000; | |
2042 | return (imm & 0x7ffff) == 0 /* lower 19 bits are 0 */ | |
2043 | && ((imm & 0x7e000000) == e); /* bits 25-29 = ~ bit 30 */ | |
2044 | } | |
2045 | ||
2046 | /* Note: this accepts the floating-point 0 constant. */ | |
2047 | static bfd_boolean | |
2048 | parse_aarch64_imm_float (char **ccp, int *immed) | |
2049 | { | |
2050 | char *str = *ccp; | |
2051 | char *fpnum; | |
2052 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
2053 | int found_fpchar = 0; | |
2054 | ||
2055 | skip_past_char (&str, '#'); | |
2056 | ||
2057 | /* We must not accidentally parse an integer as a floating-point number. Make | |
2058 | sure that the value we parse is not an integer by checking for special | |
2059 | characters '.' or 'e'. | |
2060 | FIXME: This is a hack that is not very efficient, but doing better is | |
2061 | tricky because type information isn't in a very usable state at parse | |
2062 | time. */ | |
2063 | fpnum = str; | |
2064 | skip_whitespace (fpnum); | |
2065 | ||
2066 | if (strncmp (fpnum, "0x", 2) == 0) | |
2067 | return FALSE; | |
2068 | else | |
2069 | { | |
2070 | for (; *fpnum != '\0' && *fpnum != ' ' && *fpnum != '\n'; fpnum++) | |
2071 | if (*fpnum == '.' || *fpnum == 'e' || *fpnum == 'E') | |
2072 | { | |
2073 | found_fpchar = 1; | |
2074 | break; | |
2075 | } | |
2076 | ||
2077 | if (!found_fpchar) | |
2078 | return FALSE; | |
2079 | } | |
2080 | ||
2081 | if ((str = atof_ieee (str, 's', words)) != NULL) | |
2082 | { | |
2083 | unsigned fpword = 0; | |
2084 | int i; | |
2085 | ||
2086 | /* Our FP word must be 32 bits (single-precision FP). */ | |
2087 | for (i = 0; i < 32 / LITTLENUM_NUMBER_OF_BITS; i++) | |
2088 | { | |
2089 | fpword <<= LITTLENUM_NUMBER_OF_BITS; | |
2090 | fpword |= words[i]; | |
2091 | } | |
2092 | ||
2093 | if (aarch64_imm_float_p (fpword) || (fpword & 0x7fffffff) == 0) | |
2094 | *immed = fpword; | |
2095 | else | |
2096 | goto invalid_fp; | |
2097 | ||
2098 | *ccp = str; | |
2099 | ||
2100 | return TRUE; | |
2101 | } | |
2102 | ||
2103 | invalid_fp: | |
2104 | set_fatal_syntax_error (_("invalid floating-point constant")); | |
2105 | return FALSE; | |
2106 | } | |
2107 | ||
2108 | /* Less-generic immediate-value read function with the possibility of loading | |
2109 | a big (64-bit) immediate, as required by AdvSIMD Modified immediate | |
2110 | instructions. | |
2111 | ||
2112 | To prevent the expression parser from pushing a register name into the | |
2113 | symbol table as an undefined symbol, a check is firstly done to find | |
2114 | out whether STR is a valid register name followed by a comma or the end | |
2115 | of line. Return FALSE if STR is such a register. */ | |
2116 | ||
2117 | static bfd_boolean | |
2118 | parse_big_immediate (char **str, int64_t *imm) | |
2119 | { | |
2120 | char *ptr = *str; | |
2121 | ||
2122 | if (reg_name_p (ptr, REG_TYPE_R_Z_BHSDQ_V)) | |
2123 | { | |
2124 | set_syntax_error (_("immediate operand required")); | |
2125 | return FALSE; | |
2126 | } | |
2127 | ||
2128 | my_get_expression (&inst.reloc.exp, &ptr, GE_OPT_PREFIX, 1); | |
2129 | ||
2130 | if (inst.reloc.exp.X_op == O_constant) | |
2131 | *imm = inst.reloc.exp.X_add_number; | |
2132 | ||
2133 | *str = ptr; | |
2134 | ||
2135 | return TRUE; | |
2136 | } | |
2137 | ||
2138 | /* Set operand IDX of the *INSTR that needs a GAS internal fixup. | |
2139 | if NEED_LIBOPCODES is non-zero, the fixup will need | |
2140 | assistance from the libopcodes. */ | |
2141 | ||
2142 | static inline void | |
2143 | aarch64_set_gas_internal_fixup (struct reloc *reloc, | |
2144 | const aarch64_opnd_info *operand, | |
2145 | int need_libopcodes_p) | |
2146 | { | |
2147 | reloc->type = BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP; | |
2148 | reloc->opnd = operand->type; | |
2149 | if (need_libopcodes_p) | |
2150 | reloc->need_libopcodes_p = 1; | |
2151 | }; | |
2152 | ||
2153 | /* Return TRUE if the instruction needs to be fixed up later internally by | |
2154 | the GAS; otherwise return FALSE. */ | |
2155 | ||
2156 | static inline bfd_boolean | |
2157 | aarch64_gas_internal_fixup_p (void) | |
2158 | { | |
2159 | return inst.reloc.type == BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP; | |
2160 | } | |
2161 | ||
2162 | /* Assign the immediate value to the relavant field in *OPERAND if | |
2163 | RELOC->EXP is a constant expression; otherwise, flag that *OPERAND | |
2164 | needs an internal fixup in a later stage. | |
2165 | ADDR_OFF_P determines whether it is the field ADDR.OFFSET.IMM or | |
2166 | IMM.VALUE that may get assigned with the constant. */ | |
2167 | static inline void | |
2168 | assign_imm_if_const_or_fixup_later (struct reloc *reloc, | |
2169 | aarch64_opnd_info *operand, | |
2170 | int addr_off_p, | |
2171 | int need_libopcodes_p, | |
2172 | int skip_p) | |
2173 | { | |
2174 | if (reloc->exp.X_op == O_constant) | |
2175 | { | |
2176 | if (addr_off_p) | |
2177 | operand->addr.offset.imm = reloc->exp.X_add_number; | |
2178 | else | |
2179 | operand->imm.value = reloc->exp.X_add_number; | |
2180 | reloc->type = BFD_RELOC_UNUSED; | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | aarch64_set_gas_internal_fixup (reloc, operand, need_libopcodes_p); | |
2185 | /* Tell libopcodes to ignore this operand or not. This is helpful | |
2186 | when one of the operands needs to be fixed up later but we need | |
2187 | libopcodes to check the other operands. */ | |
2188 | operand->skip = skip_p; | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* Relocation modifiers. Each entry in the table contains the textual | |
2193 | name for the relocation which may be placed before a symbol used as | |
2194 | a load/store offset, or add immediate. It must be surrounded by a | |
2195 | leading and trailing colon, for example: | |
2196 | ||
2197 | ldr x0, [x1, #:rello:varsym] | |
2198 | add x0, x1, #:rello:varsym */ | |
2199 | ||
2200 | struct reloc_table_entry | |
2201 | { | |
2202 | const char *name; | |
2203 | int pc_rel; | |
2204 | bfd_reloc_code_real_type adrp_type; | |
2205 | bfd_reloc_code_real_type movw_type; | |
2206 | bfd_reloc_code_real_type add_type; | |
2207 | bfd_reloc_code_real_type ldst_type; | |
2208 | }; | |
2209 | ||
2210 | static struct reloc_table_entry reloc_table[] = { | |
2211 | /* Low 12 bits of absolute address: ADD/i and LDR/STR */ | |
2212 | {"lo12", 0, | |
2213 | 0, | |
2214 | 0, | |
2215 | BFD_RELOC_AARCH64_ADD_LO12, | |
2216 | BFD_RELOC_AARCH64_LDST_LO12}, | |
2217 | ||
2218 | /* Higher 21 bits of pc-relative page offset: ADRP */ | |
2219 | {"pg_hi21", 1, | |
2220 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
2221 | 0, | |
2222 | 0, | |
2223 | 0}, | |
2224 | ||
2225 | /* Higher 21 bits of pc-relative page offset: ADRP, no check */ | |
2226 | {"pg_hi21_nc", 1, | |
2227 | BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL, | |
2228 | 0, | |
2229 | 0, | |
2230 | 0}, | |
2231 | ||
2232 | /* Most significant bits 0-15 of unsigned address/value: MOVZ */ | |
2233 | {"abs_g0", 0, | |
2234 | 0, | |
2235 | BFD_RELOC_AARCH64_MOVW_G0, | |
2236 | 0, | |
2237 | 0}, | |
2238 | ||
2239 | /* Most significant bits 0-15 of signed address/value: MOVN/Z */ | |
2240 | {"abs_g0_s", 0, | |
2241 | 0, | |
2242 | BFD_RELOC_AARCH64_MOVW_G0_S, | |
2243 | 0, | |
2244 | 0}, | |
2245 | ||
2246 | /* Less significant bits 0-15 of address/value: MOVK, no check */ | |
2247 | {"abs_g0_nc", 0, | |
2248 | 0, | |
2249 | BFD_RELOC_AARCH64_MOVW_G0_NC, | |
2250 | 0, | |
2251 | 0}, | |
2252 | ||
2253 | /* Most significant bits 16-31 of unsigned address/value: MOVZ */ | |
2254 | {"abs_g1", 0, | |
2255 | 0, | |
2256 | BFD_RELOC_AARCH64_MOVW_G1, | |
2257 | 0, | |
2258 | 0}, | |
2259 | ||
2260 | /* Most significant bits 16-31 of signed address/value: MOVN/Z */ | |
2261 | {"abs_g1_s", 0, | |
2262 | 0, | |
2263 | BFD_RELOC_AARCH64_MOVW_G1_S, | |
2264 | 0, | |
2265 | 0}, | |
2266 | ||
2267 | /* Less significant bits 16-31 of address/value: MOVK, no check */ | |
2268 | {"abs_g1_nc", 0, | |
2269 | 0, | |
2270 | BFD_RELOC_AARCH64_MOVW_G1_NC, | |
2271 | 0, | |
2272 | 0}, | |
2273 | ||
2274 | /* Most significant bits 32-47 of unsigned address/value: MOVZ */ | |
2275 | {"abs_g2", 0, | |
2276 | 0, | |
2277 | BFD_RELOC_AARCH64_MOVW_G2, | |
2278 | 0, | |
2279 | 0}, | |
2280 | ||
2281 | /* Most significant bits 32-47 of signed address/value: MOVN/Z */ | |
2282 | {"abs_g2_s", 0, | |
2283 | 0, | |
2284 | BFD_RELOC_AARCH64_MOVW_G2_S, | |
2285 | 0, | |
2286 | 0}, | |
2287 | ||
2288 | /* Less significant bits 32-47 of address/value: MOVK, no check */ | |
2289 | {"abs_g2_nc", 0, | |
2290 | 0, | |
2291 | BFD_RELOC_AARCH64_MOVW_G2_NC, | |
2292 | 0, | |
2293 | 0}, | |
2294 | ||
2295 | /* Most significant bits 48-63 of signed/unsigned address/value: MOVZ */ | |
2296 | {"abs_g3", 0, | |
2297 | 0, | |
2298 | BFD_RELOC_AARCH64_MOVW_G3, | |
2299 | 0, | |
2300 | 0}, | |
f41aef5f RE |
2301 | /* Get to the GOT entry for a symbol. */ |
2302 | {"got_prel19", 0, | |
2303 | 0, | |
2304 | 0, | |
2305 | 0, | |
2306 | BFD_RELOC_AARCH64_GOT_LD_PREL19}, | |
a06ea964 NC |
2307 | /* Get to the page containing GOT entry for a symbol. */ |
2308 | {"got", 1, | |
2309 | BFD_RELOC_AARCH64_ADR_GOT_PAGE, | |
2310 | 0, | |
2311 | 0, | |
2312 | 0}, | |
2313 | /* 12 bit offset into the page containing GOT entry for that symbol. */ | |
2314 | {"got_lo12", 0, | |
2315 | 0, | |
2316 | 0, | |
2317 | 0, | |
2318 | BFD_RELOC_AARCH64_LD64_GOT_LO12_NC}, | |
2319 | ||
2320 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2321 | {"tlsgd", 0, | |
2322 | BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21, | |
2323 | 0, | |
2324 | 0, | |
2325 | 0}, | |
2326 | ||
2327 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2328 | {"tlsgd_lo12", 0, | |
2329 | 0, | |
2330 | 0, | |
2331 | BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC, | |
2332 | 0}, | |
2333 | ||
2334 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2335 | {"tlsdesc", 0, | |
2336 | BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE, | |
2337 | 0, | |
2338 | 0, | |
2339 | 0}, | |
2340 | ||
2341 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2342 | {"tlsdesc_lo12", 0, | |
2343 | 0, | |
2344 | 0, | |
2345 | BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC, | |
2346 | BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC}, | |
2347 | ||
2348 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2349 | {"gottprel", 0, | |
2350 | BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, | |
2351 | 0, | |
2352 | 0, | |
2353 | 0}, | |
2354 | ||
2355 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2356 | {"gottprel_lo12", 0, | |
2357 | 0, | |
2358 | 0, | |
2359 | 0, | |
2360 | BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC}, | |
2361 | ||
2362 | /* Get tp offset for a symbol. */ | |
2363 | {"tprel", 0, | |
2364 | 0, | |
2365 | 0, | |
2366 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, | |
2367 | 0}, | |
2368 | ||
2369 | /* Get tp offset for a symbol. */ | |
2370 | {"tprel_lo12", 0, | |
2371 | 0, | |
2372 | 0, | |
2373 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, | |
2374 | 0}, | |
2375 | ||
2376 | /* Get tp offset for a symbol. */ | |
2377 | {"tprel_hi12", 0, | |
2378 | 0, | |
2379 | 0, | |
2380 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12, | |
2381 | 0}, | |
2382 | ||
2383 | /* Get tp offset for a symbol. */ | |
2384 | {"tprel_lo12_nc", 0, | |
2385 | 0, | |
2386 | 0, | |
2387 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC, | |
2388 | 0}, | |
2389 | ||
2390 | /* Most significant bits 32-47 of address/value: MOVZ. */ | |
2391 | {"tprel_g2", 0, | |
2392 | 0, | |
2393 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2, | |
2394 | 0, | |
2395 | 0}, | |
2396 | ||
2397 | /* Most significant bits 16-31 of address/value: MOVZ. */ | |
2398 | {"tprel_g1", 0, | |
2399 | 0, | |
2400 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1, | |
2401 | 0, | |
2402 | 0}, | |
2403 | ||
2404 | /* Most significant bits 16-31 of address/value: MOVZ, no check. */ | |
2405 | {"tprel_g1_nc", 0, | |
2406 | 0, | |
2407 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC, | |
2408 | 0, | |
2409 | 0}, | |
2410 | ||
2411 | /* Most significant bits 0-15 of address/value: MOVZ. */ | |
2412 | {"tprel_g0", 0, | |
2413 | 0, | |
2414 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0, | |
2415 | 0, | |
2416 | 0}, | |
2417 | ||
2418 | /* Most significant bits 0-15 of address/value: MOVZ, no check. */ | |
2419 | {"tprel_g0_nc", 0, | |
2420 | 0, | |
2421 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC, | |
2422 | 0, | |
2423 | 0}, | |
2424 | }; | |
2425 | ||
2426 | /* Given the address of a pointer pointing to the textual name of a | |
2427 | relocation as may appear in assembler source, attempt to find its | |
2428 | details in reloc_table. The pointer will be updated to the character | |
2429 | after the trailing colon. On failure, NULL will be returned; | |
2430 | otherwise return the reloc_table_entry. */ | |
2431 | ||
2432 | static struct reloc_table_entry * | |
2433 | find_reloc_table_entry (char **str) | |
2434 | { | |
2435 | unsigned int i; | |
2436 | for (i = 0; i < ARRAY_SIZE (reloc_table); i++) | |
2437 | { | |
2438 | int length = strlen (reloc_table[i].name); | |
2439 | ||
2440 | if (strncasecmp (reloc_table[i].name, *str, length) == 0 | |
2441 | && (*str)[length] == ':') | |
2442 | { | |
2443 | *str += (length + 1); | |
2444 | return &reloc_table[i]; | |
2445 | } | |
2446 | } | |
2447 | ||
2448 | return NULL; | |
2449 | } | |
2450 | ||
2451 | /* Mode argument to parse_shift and parser_shifter_operand. */ | |
2452 | enum parse_shift_mode | |
2453 | { | |
2454 | SHIFTED_ARITH_IMM, /* "rn{,lsl|lsr|asl|asr|uxt|sxt #n}" or | |
2455 | "#imm{,lsl #n}" */ | |
2456 | SHIFTED_LOGIC_IMM, /* "rn{,lsl|lsr|asl|asr|ror #n}" or | |
2457 | "#imm" */ | |
2458 | SHIFTED_LSL, /* bare "lsl #n" */ | |
2459 | SHIFTED_LSL_MSL, /* "lsl|msl #n" */ | |
2460 | SHIFTED_REG_OFFSET /* [su]xtw|sxtx {#n} or lsl #n */ | |
2461 | }; | |
2462 | ||
2463 | /* Parse a <shift> operator on an AArch64 data processing instruction. | |
2464 | Return TRUE on success; otherwise return FALSE. */ | |
2465 | static bfd_boolean | |
2466 | parse_shift (char **str, aarch64_opnd_info *operand, enum parse_shift_mode mode) | |
2467 | { | |
2468 | const struct aarch64_name_value_pair *shift_op; | |
2469 | enum aarch64_modifier_kind kind; | |
2470 | expressionS exp; | |
2471 | int exp_has_prefix; | |
2472 | char *s = *str; | |
2473 | char *p = s; | |
2474 | ||
2475 | for (p = *str; ISALPHA (*p); p++) | |
2476 | ; | |
2477 | ||
2478 | if (p == *str) | |
2479 | { | |
2480 | set_syntax_error (_("shift expression expected")); | |
2481 | return FALSE; | |
2482 | } | |
2483 | ||
2484 | shift_op = hash_find_n (aarch64_shift_hsh, *str, p - *str); | |
2485 | ||
2486 | if (shift_op == NULL) | |
2487 | { | |
2488 | set_syntax_error (_("shift operator expected")); | |
2489 | return FALSE; | |
2490 | } | |
2491 | ||
2492 | kind = aarch64_get_operand_modifier (shift_op); | |
2493 | ||
2494 | if (kind == AARCH64_MOD_MSL && mode != SHIFTED_LSL_MSL) | |
2495 | { | |
2496 | set_syntax_error (_("invalid use of 'MSL'")); | |
2497 | return FALSE; | |
2498 | } | |
2499 | ||
2500 | switch (mode) | |
2501 | { | |
2502 | case SHIFTED_LOGIC_IMM: | |
2503 | if (aarch64_extend_operator_p (kind) == TRUE) | |
2504 | { | |
2505 | set_syntax_error (_("extending shift is not permitted")); | |
2506 | return FALSE; | |
2507 | } | |
2508 | break; | |
2509 | ||
2510 | case SHIFTED_ARITH_IMM: | |
2511 | if (kind == AARCH64_MOD_ROR) | |
2512 | { | |
2513 | set_syntax_error (_("'ROR' shift is not permitted")); | |
2514 | return FALSE; | |
2515 | } | |
2516 | break; | |
2517 | ||
2518 | case SHIFTED_LSL: | |
2519 | if (kind != AARCH64_MOD_LSL) | |
2520 | { | |
2521 | set_syntax_error (_("only 'LSL' shift is permitted")); | |
2522 | return FALSE; | |
2523 | } | |
2524 | break; | |
2525 | ||
2526 | case SHIFTED_REG_OFFSET: | |
2527 | if (kind != AARCH64_MOD_UXTW && kind != AARCH64_MOD_LSL | |
2528 | && kind != AARCH64_MOD_SXTW && kind != AARCH64_MOD_SXTX) | |
2529 | { | |
2530 | set_fatal_syntax_error | |
2531 | (_("invalid shift for the register offset addressing mode")); | |
2532 | return FALSE; | |
2533 | } | |
2534 | break; | |
2535 | ||
2536 | case SHIFTED_LSL_MSL: | |
2537 | if (kind != AARCH64_MOD_LSL && kind != AARCH64_MOD_MSL) | |
2538 | { | |
2539 | set_syntax_error (_("invalid shift operator")); | |
2540 | return FALSE; | |
2541 | } | |
2542 | break; | |
2543 | ||
2544 | default: | |
2545 | abort (); | |
2546 | } | |
2547 | ||
2548 | /* Whitespace can appear here if the next thing is a bare digit. */ | |
2549 | skip_whitespace (p); | |
2550 | ||
2551 | /* Parse shift amount. */ | |
2552 | exp_has_prefix = 0; | |
2553 | if (mode == SHIFTED_REG_OFFSET && *p == ']') | |
2554 | exp.X_op = O_absent; | |
2555 | else | |
2556 | { | |
2557 | if (is_immediate_prefix (*p)) | |
2558 | { | |
2559 | p++; | |
2560 | exp_has_prefix = 1; | |
2561 | } | |
2562 | my_get_expression (&exp, &p, GE_NO_PREFIX, 0); | |
2563 | } | |
2564 | if (exp.X_op == O_absent) | |
2565 | { | |
2566 | if (aarch64_extend_operator_p (kind) == FALSE || exp_has_prefix) | |
2567 | { | |
2568 | set_syntax_error (_("missing shift amount")); | |
2569 | return FALSE; | |
2570 | } | |
2571 | operand->shifter.amount = 0; | |
2572 | } | |
2573 | else if (exp.X_op != O_constant) | |
2574 | { | |
2575 | set_syntax_error (_("constant shift amount required")); | |
2576 | return FALSE; | |
2577 | } | |
2578 | else if (exp.X_add_number < 0 || exp.X_add_number > 63) | |
2579 | { | |
2580 | set_fatal_syntax_error (_("shift amount out of range 0 to 63")); | |
2581 | return FALSE; | |
2582 | } | |
2583 | else | |
2584 | { | |
2585 | operand->shifter.amount = exp.X_add_number; | |
2586 | operand->shifter.amount_present = 1; | |
2587 | } | |
2588 | ||
2589 | operand->shifter.operator_present = 1; | |
2590 | operand->shifter.kind = kind; | |
2591 | ||
2592 | *str = p; | |
2593 | return TRUE; | |
2594 | } | |
2595 | ||
2596 | /* Parse a <shifter_operand> for a data processing instruction: | |
2597 | ||
2598 | #<immediate> | |
2599 | #<immediate>, LSL #imm | |
2600 | ||
2601 | Validation of immediate operands is deferred to md_apply_fix. | |
2602 | ||
2603 | Return TRUE on success; otherwise return FALSE. */ | |
2604 | ||
2605 | static bfd_boolean | |
2606 | parse_shifter_operand_imm (char **str, aarch64_opnd_info *operand, | |
2607 | enum parse_shift_mode mode) | |
2608 | { | |
2609 | char *p; | |
2610 | ||
2611 | if (mode != SHIFTED_ARITH_IMM && mode != SHIFTED_LOGIC_IMM) | |
2612 | return FALSE; | |
2613 | ||
2614 | p = *str; | |
2615 | ||
2616 | /* Accept an immediate expression. */ | |
2617 | if (! my_get_expression (&inst.reloc.exp, &p, GE_OPT_PREFIX, 1)) | |
2618 | return FALSE; | |
2619 | ||
2620 | /* Accept optional LSL for arithmetic immediate values. */ | |
2621 | if (mode == SHIFTED_ARITH_IMM && skip_past_comma (&p)) | |
2622 | if (! parse_shift (&p, operand, SHIFTED_LSL)) | |
2623 | return FALSE; | |
2624 | ||
2625 | /* Not accept any shifter for logical immediate values. */ | |
2626 | if (mode == SHIFTED_LOGIC_IMM && skip_past_comma (&p) | |
2627 | && parse_shift (&p, operand, mode)) | |
2628 | { | |
2629 | set_syntax_error (_("unexpected shift operator")); | |
2630 | return FALSE; | |
2631 | } | |
2632 | ||
2633 | *str = p; | |
2634 | return TRUE; | |
2635 | } | |
2636 | ||
2637 | /* Parse a <shifter_operand> for a data processing instruction: | |
2638 | ||
2639 | <Rm> | |
2640 | <Rm>, <shift> | |
2641 | #<immediate> | |
2642 | #<immediate>, LSL #imm | |
2643 | ||
2644 | where <shift> is handled by parse_shift above, and the last two | |
2645 | cases are handled by the function above. | |
2646 | ||
2647 | Validation of immediate operands is deferred to md_apply_fix. | |
2648 | ||
2649 | Return TRUE on success; otherwise return FALSE. */ | |
2650 | ||
2651 | static bfd_boolean | |
2652 | parse_shifter_operand (char **str, aarch64_opnd_info *operand, | |
2653 | enum parse_shift_mode mode) | |
2654 | { | |
2655 | int reg; | |
2656 | int isreg32, isregzero; | |
2657 | enum aarch64_operand_class opd_class | |
2658 | = aarch64_get_operand_class (operand->type); | |
2659 | ||
2660 | if ((reg = | |
2661 | aarch64_reg_parse_32_64 (str, 0, 0, &isreg32, &isregzero)) != PARSE_FAIL) | |
2662 | { | |
2663 | if (opd_class == AARCH64_OPND_CLASS_IMMEDIATE) | |
2664 | { | |
2665 | set_syntax_error (_("unexpected register in the immediate operand")); | |
2666 | return FALSE; | |
2667 | } | |
2668 | ||
2669 | if (!isregzero && reg == REG_SP) | |
2670 | { | |
2671 | set_syntax_error (BAD_SP); | |
2672 | return FALSE; | |
2673 | } | |
2674 | ||
2675 | operand->reg.regno = reg; | |
2676 | operand->qualifier = isreg32 ? AARCH64_OPND_QLF_W : AARCH64_OPND_QLF_X; | |
2677 | ||
2678 | /* Accept optional shift operation on register. */ | |
2679 | if (! skip_past_comma (str)) | |
2680 | return TRUE; | |
2681 | ||
2682 | if (! parse_shift (str, operand, mode)) | |
2683 | return FALSE; | |
2684 | ||
2685 | return TRUE; | |
2686 | } | |
2687 | else if (opd_class == AARCH64_OPND_CLASS_MODIFIED_REG) | |
2688 | { | |
2689 | set_syntax_error | |
2690 | (_("integer register expected in the extended/shifted operand " | |
2691 | "register")); | |
2692 | return FALSE; | |
2693 | } | |
2694 | ||
2695 | /* We have a shifted immediate variable. */ | |
2696 | return parse_shifter_operand_imm (str, operand, mode); | |
2697 | } | |
2698 | ||
2699 | /* Return TRUE on success; return FALSE otherwise. */ | |
2700 | ||
2701 | static bfd_boolean | |
2702 | parse_shifter_operand_reloc (char **str, aarch64_opnd_info *operand, | |
2703 | enum parse_shift_mode mode) | |
2704 | { | |
2705 | char *p = *str; | |
2706 | ||
2707 | /* Determine if we have the sequence of characters #: or just : | |
2708 | coming next. If we do, then we check for a :rello: relocation | |
2709 | modifier. If we don't, punt the whole lot to | |
2710 | parse_shifter_operand. */ | |
2711 | ||
2712 | if ((p[0] == '#' && p[1] == ':') || p[0] == ':') | |
2713 | { | |
2714 | struct reloc_table_entry *entry; | |
2715 | ||
2716 | if (p[0] == '#') | |
2717 | p += 2; | |
2718 | else | |
2719 | p++; | |
2720 | *str = p; | |
2721 | ||
2722 | /* Try to parse a relocation. Anything else is an error. */ | |
2723 | if (!(entry = find_reloc_table_entry (str))) | |
2724 | { | |
2725 | set_syntax_error (_("unknown relocation modifier")); | |
2726 | return FALSE; | |
2727 | } | |
2728 | ||
2729 | if (entry->add_type == 0) | |
2730 | { | |
2731 | set_syntax_error | |
2732 | (_("this relocation modifier is not allowed on this instruction")); | |
2733 | return FALSE; | |
2734 | } | |
2735 | ||
2736 | /* Save str before we decompose it. */ | |
2737 | p = *str; | |
2738 | ||
2739 | /* Next, we parse the expression. */ | |
2740 | if (! my_get_expression (&inst.reloc.exp, str, GE_NO_PREFIX, 1)) | |
2741 | return FALSE; | |
2742 | ||
2743 | /* Record the relocation type (use the ADD variant here). */ | |
2744 | inst.reloc.type = entry->add_type; | |
2745 | inst.reloc.pc_rel = entry->pc_rel; | |
2746 | ||
2747 | /* If str is empty, we've reached the end, stop here. */ | |
2748 | if (**str == '\0') | |
2749 | return TRUE; | |
2750 | ||
2751 | /* Otherwise, we have a shifted reloc modifier, so rewind to | |
2752 | recover the variable name and continue parsing for the shifter. */ | |
2753 | *str = p; | |
2754 | return parse_shifter_operand_imm (str, operand, mode); | |
2755 | } | |
2756 | ||
2757 | return parse_shifter_operand (str, operand, mode); | |
2758 | } | |
2759 | ||
2760 | /* Parse all forms of an address expression. Information is written | |
2761 | to *OPERAND and/or inst.reloc. | |
2762 | ||
2763 | The A64 instruction set has the following addressing modes: | |
2764 | ||
2765 | Offset | |
2766 | [base] // in SIMD ld/st structure | |
2767 | [base{,#0}] // in ld/st exclusive | |
2768 | [base{,#imm}] | |
2769 | [base,Xm{,LSL #imm}] | |
2770 | [base,Xm,SXTX {#imm}] | |
2771 | [base,Wm,(S|U)XTW {#imm}] | |
2772 | Pre-indexed | |
2773 | [base,#imm]! | |
2774 | Post-indexed | |
2775 | [base],#imm | |
2776 | [base],Xm // in SIMD ld/st structure | |
2777 | PC-relative (literal) | |
2778 | label | |
2779 | =immediate | |
2780 | ||
2781 | (As a convenience, the notation "=immediate" is permitted in conjunction | |
2782 | with the pc-relative literal load instructions to automatically place an | |
2783 | immediate value or symbolic address in a nearby literal pool and generate | |
2784 | a hidden label which references it.) | |
2785 | ||
2786 | Upon a successful parsing, the address structure in *OPERAND will be | |
2787 | filled in the following way: | |
2788 | ||
2789 | .base_regno = <base> | |
2790 | .offset.is_reg // 1 if the offset is a register | |
2791 | .offset.imm = <imm> | |
2792 | .offset.regno = <Rm> | |
2793 | ||
2794 | For different addressing modes defined in the A64 ISA: | |
2795 | ||
2796 | Offset | |
2797 | .pcrel=0; .preind=1; .postind=0; .writeback=0 | |
2798 | Pre-indexed | |
2799 | .pcrel=0; .preind=1; .postind=0; .writeback=1 | |
2800 | Post-indexed | |
2801 | .pcrel=0; .preind=0; .postind=1; .writeback=1 | |
2802 | PC-relative (literal) | |
2803 | .pcrel=1; .preind=1; .postind=0; .writeback=0 | |
2804 | ||
2805 | The shift/extension information, if any, will be stored in .shifter. | |
2806 | ||
2807 | It is the caller's responsibility to check for addressing modes not | |
2808 | supported by the instruction, and to set inst.reloc.type. */ | |
2809 | ||
2810 | static bfd_boolean | |
2811 | parse_address_main (char **str, aarch64_opnd_info *operand, int reloc, | |
2812 | int accept_reg_post_index) | |
2813 | { | |
2814 | char *p = *str; | |
2815 | int reg; | |
2816 | int isreg32, isregzero; | |
2817 | expressionS *exp = &inst.reloc.exp; | |
2818 | ||
2819 | if (! skip_past_char (&p, '[')) | |
2820 | { | |
2821 | /* =immediate or label. */ | |
2822 | operand->addr.pcrel = 1; | |
2823 | operand->addr.preind = 1; | |
2824 | ||
f41aef5f RE |
2825 | /* #:<reloc_op>:<symbol> */ |
2826 | skip_past_char (&p, '#'); | |
2827 | if (reloc && skip_past_char (&p, ':')) | |
2828 | { | |
2829 | struct reloc_table_entry *entry; | |
2830 | ||
2831 | /* Try to parse a relocation modifier. Anything else is | |
2832 | an error. */ | |
2833 | entry = find_reloc_table_entry (&p); | |
2834 | if (! entry) | |
2835 | { | |
2836 | set_syntax_error (_("unknown relocation modifier")); | |
2837 | return FALSE; | |
2838 | } | |
2839 | ||
2840 | if (entry->ldst_type == 0) | |
2841 | { | |
2842 | set_syntax_error | |
2843 | (_("this relocation modifier is not allowed on this " | |
2844 | "instruction")); | |
2845 | return FALSE; | |
2846 | } | |
2847 | ||
2848 | /* #:<reloc_op>: */ | |
2849 | if (! my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
2850 | { | |
2851 | set_syntax_error (_("invalid relocation expression")); | |
2852 | return FALSE; | |
2853 | } | |
a06ea964 | 2854 | |
f41aef5f RE |
2855 | /* #:<reloc_op>:<expr> */ |
2856 | /* Record the load/store relocation type. */ | |
2857 | inst.reloc.type = entry->ldst_type; | |
2858 | inst.reloc.pc_rel = entry->pc_rel; | |
2859 | } | |
2860 | else | |
a06ea964 | 2861 | { |
f41aef5f RE |
2862 | |
2863 | if (skip_past_char (&p, '=')) | |
2864 | /* =immediate; need to generate the literal in the literal pool. */ | |
2865 | inst.gen_lit_pool = 1; | |
2866 | ||
2867 | if (!my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
2868 | { | |
2869 | set_syntax_error (_("invalid address")); | |
2870 | return FALSE; | |
2871 | } | |
a06ea964 NC |
2872 | } |
2873 | ||
2874 | *str = p; | |
2875 | return TRUE; | |
2876 | } | |
2877 | ||
2878 | /* [ */ | |
2879 | ||
2880 | /* Accept SP and reject ZR */ | |
2881 | reg = aarch64_reg_parse_32_64 (&p, 0, 1, &isreg32, &isregzero); | |
2882 | if (reg == PARSE_FAIL || isreg32) | |
2883 | { | |
2884 | set_syntax_error (_(get_reg_expected_msg (REG_TYPE_R_64))); | |
2885 | return FALSE; | |
2886 | } | |
2887 | operand->addr.base_regno = reg; | |
2888 | ||
2889 | /* [Xn */ | |
2890 | if (skip_past_comma (&p)) | |
2891 | { | |
2892 | /* [Xn, */ | |
2893 | operand->addr.preind = 1; | |
2894 | ||
2895 | /* Reject SP and accept ZR */ | |
2896 | reg = aarch64_reg_parse_32_64 (&p, 1, 0, &isreg32, &isregzero); | |
2897 | if (reg != PARSE_FAIL) | |
2898 | { | |
2899 | /* [Xn,Rm */ | |
2900 | operand->addr.offset.regno = reg; | |
2901 | operand->addr.offset.is_reg = 1; | |
2902 | /* Shifted index. */ | |
2903 | if (skip_past_comma (&p)) | |
2904 | { | |
2905 | /* [Xn,Rm, */ | |
2906 | if (! parse_shift (&p, operand, SHIFTED_REG_OFFSET)) | |
2907 | /* Use the diagnostics set in parse_shift, so not set new | |
2908 | error message here. */ | |
2909 | return FALSE; | |
2910 | } | |
2911 | /* We only accept: | |
2912 | [base,Xm{,LSL #imm}] | |
2913 | [base,Xm,SXTX {#imm}] | |
2914 | [base,Wm,(S|U)XTW {#imm}] */ | |
2915 | if (operand->shifter.kind == AARCH64_MOD_NONE | |
2916 | || operand->shifter.kind == AARCH64_MOD_LSL | |
2917 | || operand->shifter.kind == AARCH64_MOD_SXTX) | |
2918 | { | |
2919 | if (isreg32) | |
2920 | { | |
2921 | set_syntax_error (_("invalid use of 32-bit register offset")); | |
2922 | return FALSE; | |
2923 | } | |
2924 | } | |
2925 | else if (!isreg32) | |
2926 | { | |
2927 | set_syntax_error (_("invalid use of 64-bit register offset")); | |
2928 | return FALSE; | |
2929 | } | |
2930 | } | |
2931 | else | |
2932 | { | |
2933 | /* [Xn,#:<reloc_op>:<symbol> */ | |
2934 | skip_past_char (&p, '#'); | |
2935 | if (reloc && skip_past_char (&p, ':')) | |
2936 | { | |
2937 | struct reloc_table_entry *entry; | |
2938 | ||
2939 | /* Try to parse a relocation modifier. Anything else is | |
2940 | an error. */ | |
2941 | if (!(entry = find_reloc_table_entry (&p))) | |
2942 | { | |
2943 | set_syntax_error (_("unknown relocation modifier")); | |
2944 | return FALSE; | |
2945 | } | |
2946 | ||
2947 | if (entry->ldst_type == 0) | |
2948 | { | |
2949 | set_syntax_error | |
2950 | (_("this relocation modifier is not allowed on this " | |
2951 | "instruction")); | |
2952 | return FALSE; | |
2953 | } | |
2954 | ||
2955 | /* [Xn,#:<reloc_op>: */ | |
2956 | /* We now have the group relocation table entry corresponding to | |
2957 | the name in the assembler source. Next, we parse the | |
2958 | expression. */ | |
2959 | if (! my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
2960 | { | |
2961 | set_syntax_error (_("invalid relocation expression")); | |
2962 | return FALSE; | |
2963 | } | |
2964 | ||
2965 | /* [Xn,#:<reloc_op>:<expr> */ | |
2966 | /* Record the load/store relocation type. */ | |
2967 | inst.reloc.type = entry->ldst_type; | |
2968 | inst.reloc.pc_rel = entry->pc_rel; | |
2969 | } | |
2970 | else if (! my_get_expression (exp, &p, GE_OPT_PREFIX, 1)) | |
2971 | { | |
2972 | set_syntax_error (_("invalid expression in the address")); | |
2973 | return FALSE; | |
2974 | } | |
2975 | /* [Xn,<expr> */ | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | if (! skip_past_char (&p, ']')) | |
2980 | { | |
2981 | set_syntax_error (_("']' expected")); | |
2982 | return FALSE; | |
2983 | } | |
2984 | ||
2985 | if (skip_past_char (&p, '!')) | |
2986 | { | |
2987 | if (operand->addr.preind && operand->addr.offset.is_reg) | |
2988 | { | |
2989 | set_syntax_error (_("register offset not allowed in pre-indexed " | |
2990 | "addressing mode")); | |
2991 | return FALSE; | |
2992 | } | |
2993 | /* [Xn]! */ | |
2994 | operand->addr.writeback = 1; | |
2995 | } | |
2996 | else if (skip_past_comma (&p)) | |
2997 | { | |
2998 | /* [Xn], */ | |
2999 | operand->addr.postind = 1; | |
3000 | operand->addr.writeback = 1; | |
3001 | ||
3002 | if (operand->addr.preind) | |
3003 | { | |
3004 | set_syntax_error (_("cannot combine pre- and post-indexing")); | |
3005 | return FALSE; | |
3006 | } | |
3007 | ||
3008 | if (accept_reg_post_index | |
3009 | && (reg = aarch64_reg_parse_32_64 (&p, 1, 1, &isreg32, | |
3010 | &isregzero)) != PARSE_FAIL) | |
3011 | { | |
3012 | /* [Xn],Xm */ | |
3013 | if (isreg32) | |
3014 | { | |
3015 | set_syntax_error (_("invalid 32-bit register offset")); | |
3016 | return FALSE; | |
3017 | } | |
3018 | operand->addr.offset.regno = reg; | |
3019 | operand->addr.offset.is_reg = 1; | |
3020 | } | |
3021 | else if (! my_get_expression (exp, &p, GE_OPT_PREFIX, 1)) | |
3022 | { | |
3023 | /* [Xn],#expr */ | |
3024 | set_syntax_error (_("invalid expression in the address")); | |
3025 | return FALSE; | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | /* If at this point neither .preind nor .postind is set, we have a | |
3030 | bare [Rn]{!}; reject [Rn]! but accept [Rn] as a shorthand for [Rn,#0]. */ | |
3031 | if (operand->addr.preind == 0 && operand->addr.postind == 0) | |
3032 | { | |
3033 | if (operand->addr.writeback) | |
3034 | { | |
3035 | /* Reject [Rn]! */ | |
3036 | set_syntax_error (_("missing offset in the pre-indexed address")); | |
3037 | return FALSE; | |
3038 | } | |
3039 | operand->addr.preind = 1; | |
3040 | inst.reloc.exp.X_op = O_constant; | |
3041 | inst.reloc.exp.X_add_number = 0; | |
3042 | } | |
3043 | ||
3044 | *str = p; | |
3045 | return TRUE; | |
3046 | } | |
3047 | ||
3048 | /* Return TRUE on success; otherwise return FALSE. */ | |
3049 | static bfd_boolean | |
3050 | parse_address (char **str, aarch64_opnd_info *operand, | |
3051 | int accept_reg_post_index) | |
3052 | { | |
3053 | return parse_address_main (str, operand, 0, accept_reg_post_index); | |
3054 | } | |
3055 | ||
3056 | /* Return TRUE on success; otherwise return FALSE. */ | |
3057 | static bfd_boolean | |
3058 | parse_address_reloc (char **str, aarch64_opnd_info *operand) | |
3059 | { | |
3060 | return parse_address_main (str, operand, 1, 0); | |
3061 | } | |
3062 | ||
3063 | /* Parse an operand for a MOVZ, MOVN or MOVK instruction. | |
3064 | Return TRUE on success; otherwise return FALSE. */ | |
3065 | static bfd_boolean | |
3066 | parse_half (char **str, int *internal_fixup_p) | |
3067 | { | |
3068 | char *p, *saved; | |
3069 | int dummy; | |
3070 | ||
3071 | p = *str; | |
3072 | skip_past_char (&p, '#'); | |
3073 | ||
3074 | gas_assert (internal_fixup_p); | |
3075 | *internal_fixup_p = 0; | |
3076 | ||
3077 | if (*p == ':') | |
3078 | { | |
3079 | struct reloc_table_entry *entry; | |
3080 | ||
3081 | /* Try to parse a relocation. Anything else is an error. */ | |
3082 | ++p; | |
3083 | if (!(entry = find_reloc_table_entry (&p))) | |
3084 | { | |
3085 | set_syntax_error (_("unknown relocation modifier")); | |
3086 | return FALSE; | |
3087 | } | |
3088 | ||
3089 | if (entry->movw_type == 0) | |
3090 | { | |
3091 | set_syntax_error | |
3092 | (_("this relocation modifier is not allowed on this instruction")); | |
3093 | return FALSE; | |
3094 | } | |
3095 | ||
3096 | inst.reloc.type = entry->movw_type; | |
3097 | } | |
3098 | else | |
3099 | *internal_fixup_p = 1; | |
3100 | ||
3101 | /* Avoid parsing a register as a general symbol. */ | |
3102 | saved = p; | |
3103 | if (aarch64_reg_parse_32_64 (&p, 0, 0, &dummy, &dummy) != PARSE_FAIL) | |
3104 | return FALSE; | |
3105 | p = saved; | |
3106 | ||
3107 | if (! my_get_expression (&inst.reloc.exp, &p, GE_NO_PREFIX, 1)) | |
3108 | return FALSE; | |
3109 | ||
3110 | *str = p; | |
3111 | return TRUE; | |
3112 | } | |
3113 | ||
3114 | /* Parse an operand for an ADRP instruction: | |
3115 | ADRP <Xd>, <label> | |
3116 | Return TRUE on success; otherwise return FALSE. */ | |
3117 | ||
3118 | static bfd_boolean | |
3119 | parse_adrp (char **str) | |
3120 | { | |
3121 | char *p; | |
3122 | ||
3123 | p = *str; | |
3124 | if (*p == ':') | |
3125 | { | |
3126 | struct reloc_table_entry *entry; | |
3127 | ||
3128 | /* Try to parse a relocation. Anything else is an error. */ | |
3129 | ++p; | |
3130 | if (!(entry = find_reloc_table_entry (&p))) | |
3131 | { | |
3132 | set_syntax_error (_("unknown relocation modifier")); | |
3133 | return FALSE; | |
3134 | } | |
3135 | ||
3136 | if (entry->adrp_type == 0) | |
3137 | { | |
3138 | set_syntax_error | |
3139 | (_("this relocation modifier is not allowed on this instruction")); | |
3140 | return FALSE; | |
3141 | } | |
3142 | ||
3143 | inst.reloc.type = entry->adrp_type; | |
3144 | } | |
3145 | else | |
3146 | inst.reloc.type = BFD_RELOC_AARCH64_ADR_HI21_PCREL; | |
3147 | ||
3148 | inst.reloc.pc_rel = 1; | |
3149 | ||
3150 | if (! my_get_expression (&inst.reloc.exp, &p, GE_NO_PREFIX, 1)) | |
3151 | return FALSE; | |
3152 | ||
3153 | *str = p; | |
3154 | return TRUE; | |
3155 | } | |
3156 | ||
3157 | /* Miscellaneous. */ | |
3158 | ||
3159 | /* Parse an option for a preload instruction. Returns the encoding for the | |
3160 | option, or PARSE_FAIL. */ | |
3161 | ||
3162 | static int | |
3163 | parse_pldop (char **str) | |
3164 | { | |
3165 | char *p, *q; | |
3166 | const struct aarch64_name_value_pair *o; | |
3167 | ||
3168 | p = q = *str; | |
3169 | while (ISALNUM (*q)) | |
3170 | q++; | |
3171 | ||
3172 | o = hash_find_n (aarch64_pldop_hsh, p, q - p); | |
3173 | if (!o) | |
3174 | return PARSE_FAIL; | |
3175 | ||
3176 | *str = q; | |
3177 | return o->value; | |
3178 | } | |
3179 | ||
3180 | /* Parse an option for a barrier instruction. Returns the encoding for the | |
3181 | option, or PARSE_FAIL. */ | |
3182 | ||
3183 | static int | |
3184 | parse_barrier (char **str) | |
3185 | { | |
3186 | char *p, *q; | |
3187 | const asm_barrier_opt *o; | |
3188 | ||
3189 | p = q = *str; | |
3190 | while (ISALPHA (*q)) | |
3191 | q++; | |
3192 | ||
3193 | o = hash_find_n (aarch64_barrier_opt_hsh, p, q - p); | |
3194 | if (!o) | |
3195 | return PARSE_FAIL; | |
3196 | ||
3197 | *str = q; | |
3198 | return o->value; | |
3199 | } | |
3200 | ||
3201 | /* Parse a system register or a PSTATE field name for an MSR/MRS instruction. | |
3202 | Returns the encoding for the option, or PARSE_FAIL. | |
3203 | ||
3204 | If IMPLE_DEFINED_P is non-zero, the function will also try to parse the | |
3205 | implementation defined system register name S3_<op1>_<Cn>_<Cm>_<op2>. */ | |
3206 | ||
3207 | static int | |
3208 | parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p) | |
3209 | { | |
3210 | char *p, *q; | |
3211 | char buf[32]; | |
3212 | const struct aarch64_name_value_pair *o; | |
3213 | int value; | |
3214 | ||
3215 | p = buf; | |
3216 | for (q = *str; ISALNUM (*q) || *q == '_'; q++) | |
3217 | if (p < buf + 31) | |
3218 | *p++ = TOLOWER (*q); | |
3219 | *p = '\0'; | |
3220 | /* Assert that BUF be large enough. */ | |
3221 | gas_assert (p - buf == q - *str); | |
3222 | ||
3223 | o = hash_find (sys_regs, buf); | |
3224 | if (!o) | |
3225 | { | |
3226 | if (!imple_defined_p) | |
3227 | return PARSE_FAIL; | |
3228 | else | |
3229 | { | |
3230 | /* Parse S3_<op1>_<Cn>_<Cm>_<op2>, the implementation defined | |
3231 | registers. */ | |
3232 | unsigned int op0, op1, cn, cm, op2; | |
3233 | if (sscanf (buf, "s%u_%u_c%u_c%u_%u", &op0, &op1, &cn, &cm, &op2) != 5) | |
3234 | return PARSE_FAIL; | |
3235 | /* Register access is encoded as follows: | |
3236 | op0 op1 CRn CRm op2 | |
3237 | 11 xxx 1x11 xxxx xxx. */ | |
3238 | if (op0 != 3 || op1 > 7 || (cn | 0x4) != 0xf || cm > 15 || op2 > 7) | |
3239 | return PARSE_FAIL; | |
3240 | value = (op0 << 14) | (op1 << 11) | (cn << 7) | (cm << 3) | op2; | |
3241 | } | |
3242 | } | |
3243 | else | |
3244 | value = o->value; | |
3245 | ||
3246 | *str = q; | |
3247 | return value; | |
3248 | } | |
3249 | ||
3250 | /* Parse a system reg for ic/dc/at/tlbi instructions. Returns the table entry | |
3251 | for the option, or NULL. */ | |
3252 | ||
3253 | static const aarch64_sys_ins_reg * | |
3254 | parse_sys_ins_reg (char **str, struct hash_control *sys_ins_regs) | |
3255 | { | |
3256 | char *p, *q; | |
3257 | char buf[32]; | |
3258 | const aarch64_sys_ins_reg *o; | |
3259 | ||
3260 | p = buf; | |
3261 | for (q = *str; ISALNUM (*q) || *q == '_'; q++) | |
3262 | if (p < buf + 31) | |
3263 | *p++ = TOLOWER (*q); | |
3264 | *p = '\0'; | |
3265 | ||
3266 | o = hash_find (sys_ins_regs, buf); | |
3267 | if (!o) | |
3268 | return NULL; | |
3269 | ||
3270 | *str = q; | |
3271 | return o; | |
3272 | } | |
3273 | \f | |
3274 | #define po_char_or_fail(chr) do { \ | |
3275 | if (! skip_past_char (&str, chr)) \ | |
3276 | goto failure; \ | |
3277 | } while (0) | |
3278 | ||
3279 | #define po_reg_or_fail(regtype) do { \ | |
3280 | val = aarch64_reg_parse (&str, regtype, &rtype, NULL); \ | |
3281 | if (val == PARSE_FAIL) \ | |
3282 | { \ | |
3283 | set_default_error (); \ | |
3284 | goto failure; \ | |
3285 | } \ | |
3286 | } while (0) | |
3287 | ||
3288 | #define po_int_reg_or_fail(reject_sp, reject_rz) do { \ | |
3289 | val = aarch64_reg_parse_32_64 (&str, reject_sp, reject_rz, \ | |
3290 | &isreg32, &isregzero); \ | |
3291 | if (val == PARSE_FAIL) \ | |
3292 | { \ | |
3293 | set_default_error (); \ | |
3294 | goto failure; \ | |
3295 | } \ | |
3296 | info->reg.regno = val; \ | |
3297 | if (isreg32) \ | |
3298 | info->qualifier = AARCH64_OPND_QLF_W; \ | |
3299 | else \ | |
3300 | info->qualifier = AARCH64_OPND_QLF_X; \ | |
3301 | } while (0) | |
3302 | ||
3303 | #define po_imm_nc_or_fail() do { \ | |
3304 | if (! parse_constant_immediate (&str, &val)) \ | |
3305 | goto failure; \ | |
3306 | } while (0) | |
3307 | ||
3308 | #define po_imm_or_fail(min, max) do { \ | |
3309 | if (! parse_constant_immediate (&str, &val)) \ | |
3310 | goto failure; \ | |
3311 | if (val < min || val > max) \ | |
3312 | { \ | |
3313 | set_fatal_syntax_error (_("immediate value out of range "\ | |
3314 | #min " to "#max)); \ | |
3315 | goto failure; \ | |
3316 | } \ | |
3317 | } while (0) | |
3318 | ||
3319 | #define po_misc_or_fail(expr) do { \ | |
3320 | if (!expr) \ | |
3321 | goto failure; \ | |
3322 | } while (0) | |
3323 | \f | |
3324 | /* encode the 12-bit imm field of Add/sub immediate */ | |
3325 | static inline uint32_t | |
3326 | encode_addsub_imm (uint32_t imm) | |
3327 | { | |
3328 | return imm << 10; | |
3329 | } | |
3330 | ||
3331 | /* encode the shift amount field of Add/sub immediate */ | |
3332 | static inline uint32_t | |
3333 | encode_addsub_imm_shift_amount (uint32_t cnt) | |
3334 | { | |
3335 | return cnt << 22; | |
3336 | } | |
3337 | ||
3338 | ||
3339 | /* encode the imm field of Adr instruction */ | |
3340 | static inline uint32_t | |
3341 | encode_adr_imm (uint32_t imm) | |
3342 | { | |
3343 | return (((imm & 0x3) << 29) /* [1:0] -> [30:29] */ | |
3344 | | ((imm & (0x7ffff << 2)) << 3)); /* [20:2] -> [23:5] */ | |
3345 | } | |
3346 | ||
3347 | /* encode the immediate field of Move wide immediate */ | |
3348 | static inline uint32_t | |
3349 | encode_movw_imm (uint32_t imm) | |
3350 | { | |
3351 | return imm << 5; | |
3352 | } | |
3353 | ||
3354 | /* encode the 26-bit offset of unconditional branch */ | |
3355 | static inline uint32_t | |
3356 | encode_branch_ofs_26 (uint32_t ofs) | |
3357 | { | |
3358 | return ofs & ((1 << 26) - 1); | |
3359 | } | |
3360 | ||
3361 | /* encode the 19-bit offset of conditional branch and compare & branch */ | |
3362 | static inline uint32_t | |
3363 | encode_cond_branch_ofs_19 (uint32_t ofs) | |
3364 | { | |
3365 | return (ofs & ((1 << 19) - 1)) << 5; | |
3366 | } | |
3367 | ||
3368 | /* encode the 19-bit offset of ld literal */ | |
3369 | static inline uint32_t | |
3370 | encode_ld_lit_ofs_19 (uint32_t ofs) | |
3371 | { | |
3372 | return (ofs & ((1 << 19) - 1)) << 5; | |
3373 | } | |
3374 | ||
3375 | /* Encode the 14-bit offset of test & branch. */ | |
3376 | static inline uint32_t | |
3377 | encode_tst_branch_ofs_14 (uint32_t ofs) | |
3378 | { | |
3379 | return (ofs & ((1 << 14) - 1)) << 5; | |
3380 | } | |
3381 | ||
3382 | /* Encode the 16-bit imm field of svc/hvc/smc. */ | |
3383 | static inline uint32_t | |
3384 | encode_svc_imm (uint32_t imm) | |
3385 | { | |
3386 | return imm << 5; | |
3387 | } | |
3388 | ||
3389 | /* Reencode add(s) to sub(s), or sub(s) to add(s). */ | |
3390 | static inline uint32_t | |
3391 | reencode_addsub_switch_add_sub (uint32_t opcode) | |
3392 | { | |
3393 | return opcode ^ (1 << 30); | |
3394 | } | |
3395 | ||
3396 | static inline uint32_t | |
3397 | reencode_movzn_to_movz (uint32_t opcode) | |
3398 | { | |
3399 | return opcode | (1 << 30); | |
3400 | } | |
3401 | ||
3402 | static inline uint32_t | |
3403 | reencode_movzn_to_movn (uint32_t opcode) | |
3404 | { | |
3405 | return opcode & ~(1 << 30); | |
3406 | } | |
3407 | ||
3408 | /* Overall per-instruction processing. */ | |
3409 | ||
3410 | /* We need to be able to fix up arbitrary expressions in some statements. | |
3411 | This is so that we can handle symbols that are an arbitrary distance from | |
3412 | the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask), | |
3413 | which returns part of an address in a form which will be valid for | |
3414 | a data instruction. We do this by pushing the expression into a symbol | |
3415 | in the expr_section, and creating a fix for that. */ | |
3416 | ||
3417 | static fixS * | |
3418 | fix_new_aarch64 (fragS * frag, | |
3419 | int where, | |
3420 | short int size, expressionS * exp, int pc_rel, int reloc) | |
3421 | { | |
3422 | fixS *new_fix; | |
3423 | ||
3424 | switch (exp->X_op) | |
3425 | { | |
3426 | case O_constant: | |
3427 | case O_symbol: | |
3428 | case O_add: | |
3429 | case O_subtract: | |
3430 | new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc); | |
3431 | break; | |
3432 | ||
3433 | default: | |
3434 | new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0, | |
3435 | pc_rel, reloc); | |
3436 | break; | |
3437 | } | |
3438 | return new_fix; | |
3439 | } | |
3440 | \f | |
3441 | /* Diagnostics on operands errors. */ | |
3442 | ||
3443 | /* By default, output one-line error message only. | |
3444 | Enable the verbose error message by -merror-verbose. */ | |
3445 | static int verbose_error_p = 0; | |
3446 | ||
3447 | #ifdef DEBUG_AARCH64 | |
3448 | /* N.B. this is only for the purpose of debugging. */ | |
3449 | const char* operand_mismatch_kind_names[] = | |
3450 | { | |
3451 | "AARCH64_OPDE_NIL", | |
3452 | "AARCH64_OPDE_RECOVERABLE", | |
3453 | "AARCH64_OPDE_SYNTAX_ERROR", | |
3454 | "AARCH64_OPDE_FATAL_SYNTAX_ERROR", | |
3455 | "AARCH64_OPDE_INVALID_VARIANT", | |
3456 | "AARCH64_OPDE_OUT_OF_RANGE", | |
3457 | "AARCH64_OPDE_UNALIGNED", | |
3458 | "AARCH64_OPDE_REG_LIST", | |
3459 | "AARCH64_OPDE_OTHER_ERROR", | |
3460 | }; | |
3461 | #endif /* DEBUG_AARCH64 */ | |
3462 | ||
3463 | /* Return TRUE if LHS is of higher severity than RHS, otherwise return FALSE. | |
3464 | ||
3465 | When multiple errors of different kinds are found in the same assembly | |
3466 | line, only the error of the highest severity will be picked up for | |
3467 | issuing the diagnostics. */ | |
3468 | ||
3469 | static inline bfd_boolean | |
3470 | operand_error_higher_severity_p (enum aarch64_operand_error_kind lhs, | |
3471 | enum aarch64_operand_error_kind rhs) | |
3472 | { | |
3473 | gas_assert (AARCH64_OPDE_RECOVERABLE > AARCH64_OPDE_NIL); | |
3474 | gas_assert (AARCH64_OPDE_SYNTAX_ERROR > AARCH64_OPDE_RECOVERABLE); | |
3475 | gas_assert (AARCH64_OPDE_FATAL_SYNTAX_ERROR > AARCH64_OPDE_SYNTAX_ERROR); | |
3476 | gas_assert (AARCH64_OPDE_INVALID_VARIANT > AARCH64_OPDE_FATAL_SYNTAX_ERROR); | |
3477 | gas_assert (AARCH64_OPDE_OUT_OF_RANGE > AARCH64_OPDE_INVALID_VARIANT); | |
3478 | gas_assert (AARCH64_OPDE_UNALIGNED > AARCH64_OPDE_OUT_OF_RANGE); | |
3479 | gas_assert (AARCH64_OPDE_REG_LIST > AARCH64_OPDE_UNALIGNED); | |
3480 | gas_assert (AARCH64_OPDE_OTHER_ERROR > AARCH64_OPDE_REG_LIST); | |
3481 | return lhs > rhs; | |
3482 | } | |
3483 | ||
3484 | /* Helper routine to get the mnemonic name from the assembly instruction | |
3485 | line; should only be called for the diagnosis purpose, as there is | |
3486 | string copy operation involved, which may affect the runtime | |
3487 | performance if used in elsewhere. */ | |
3488 | ||
3489 | static const char* | |
3490 | get_mnemonic_name (const char *str) | |
3491 | { | |
3492 | static char mnemonic[32]; | |
3493 | char *ptr; | |
3494 | ||
3495 | /* Get the first 15 bytes and assume that the full name is included. */ | |
3496 | strncpy (mnemonic, str, 31); | |
3497 | mnemonic[31] = '\0'; | |
3498 | ||
3499 | /* Scan up to the end of the mnemonic, which must end in white space, | |
3500 | '.', or end of string. */ | |
3501 | for (ptr = mnemonic; is_part_of_name(*ptr); ++ptr) | |
3502 | ; | |
3503 | ||
3504 | *ptr = '\0'; | |
3505 | ||
3506 | /* Append '...' to the truncated long name. */ | |
3507 | if (ptr - mnemonic == 31) | |
3508 | mnemonic[28] = mnemonic[29] = mnemonic[30] = '.'; | |
3509 | ||
3510 | return mnemonic; | |
3511 | } | |
3512 | ||
3513 | static void | |
3514 | reset_aarch64_instruction (aarch64_instruction *instruction) | |
3515 | { | |
3516 | memset (instruction, '\0', sizeof (aarch64_instruction)); | |
3517 | instruction->reloc.type = BFD_RELOC_UNUSED; | |
3518 | } | |
3519 | ||
3520 | /* Data strutures storing one user error in the assembly code related to | |
3521 | operands. */ | |
3522 | ||
3523 | struct operand_error_record | |
3524 | { | |
3525 | const aarch64_opcode *opcode; | |
3526 | aarch64_operand_error detail; | |
3527 | struct operand_error_record *next; | |
3528 | }; | |
3529 | ||
3530 | typedef struct operand_error_record operand_error_record; | |
3531 | ||
3532 | struct operand_errors | |
3533 | { | |
3534 | operand_error_record *head; | |
3535 | operand_error_record *tail; | |
3536 | }; | |
3537 | ||
3538 | typedef struct operand_errors operand_errors; | |
3539 | ||
3540 | /* Top-level data structure reporting user errors for the current line of | |
3541 | the assembly code. | |
3542 | The way md_assemble works is that all opcodes sharing the same mnemonic | |
3543 | name are iterated to find a match to the assembly line. In this data | |
3544 | structure, each of the such opcodes will have one operand_error_record | |
3545 | allocated and inserted. In other words, excessive errors related with | |
3546 | a single opcode are disregarded. */ | |
3547 | operand_errors operand_error_report; | |
3548 | ||
3549 | /* Free record nodes. */ | |
3550 | static operand_error_record *free_opnd_error_record_nodes = NULL; | |
3551 | ||
3552 | /* Initialize the data structure that stores the operand mismatch | |
3553 | information on assembling one line of the assembly code. */ | |
3554 | static void | |
3555 | init_operand_error_report (void) | |
3556 | { | |
3557 | if (operand_error_report.head != NULL) | |
3558 | { | |
3559 | gas_assert (operand_error_report.tail != NULL); | |
3560 | operand_error_report.tail->next = free_opnd_error_record_nodes; | |
3561 | free_opnd_error_record_nodes = operand_error_report.head; | |
3562 | operand_error_report.head = NULL; | |
3563 | operand_error_report.tail = NULL; | |
3564 | return; | |
3565 | } | |
3566 | gas_assert (operand_error_report.tail == NULL); | |
3567 | } | |
3568 | ||
3569 | /* Return TRUE if some operand error has been recorded during the | |
3570 | parsing of the current assembly line using the opcode *OPCODE; | |
3571 | otherwise return FALSE. */ | |
3572 | static inline bfd_boolean | |
3573 | opcode_has_operand_error_p (const aarch64_opcode *opcode) | |
3574 | { | |
3575 | operand_error_record *record = operand_error_report.head; | |
3576 | return record && record->opcode == opcode; | |
3577 | } | |
3578 | ||
3579 | /* Add the error record *NEW_RECORD to operand_error_report. The record's | |
3580 | OPCODE field is initialized with OPCODE. | |
3581 | N.B. only one record for each opcode, i.e. the maximum of one error is | |
3582 | recorded for each instruction template. */ | |
3583 | ||
3584 | static void | |
3585 | add_operand_error_record (const operand_error_record* new_record) | |
3586 | { | |
3587 | const aarch64_opcode *opcode = new_record->opcode; | |
3588 | operand_error_record* record = operand_error_report.head; | |
3589 | ||
3590 | /* The record may have been created for this opcode. If not, we need | |
3591 | to prepare one. */ | |
3592 | if (! opcode_has_operand_error_p (opcode)) | |
3593 | { | |
3594 | /* Get one empty record. */ | |
3595 | if (free_opnd_error_record_nodes == NULL) | |
3596 | { | |
3597 | record = xmalloc (sizeof (operand_error_record)); | |
3598 | if (record == NULL) | |
3599 | abort (); | |
3600 | } | |
3601 | else | |
3602 | { | |
3603 | record = free_opnd_error_record_nodes; | |
3604 | free_opnd_error_record_nodes = record->next; | |
3605 | } | |
3606 | record->opcode = opcode; | |
3607 | /* Insert at the head. */ | |
3608 | record->next = operand_error_report.head; | |
3609 | operand_error_report.head = record; | |
3610 | if (operand_error_report.tail == NULL) | |
3611 | operand_error_report.tail = record; | |
3612 | } | |
3613 | else if (record->detail.kind != AARCH64_OPDE_NIL | |
3614 | && record->detail.index <= new_record->detail.index | |
3615 | && operand_error_higher_severity_p (record->detail.kind, | |
3616 | new_record->detail.kind)) | |
3617 | { | |
3618 | /* In the case of multiple errors found on operands related with a | |
3619 | single opcode, only record the error of the leftmost operand and | |
3620 | only if the error is of higher severity. */ | |
3621 | DEBUG_TRACE ("error %s on operand %d not added to the report due to" | |
3622 | " the existing error %s on operand %d", | |
3623 | operand_mismatch_kind_names[new_record->detail.kind], | |
3624 | new_record->detail.index, | |
3625 | operand_mismatch_kind_names[record->detail.kind], | |
3626 | record->detail.index); | |
3627 | return; | |
3628 | } | |
3629 | ||
3630 | record->detail = new_record->detail; | |
3631 | } | |
3632 | ||
3633 | static inline void | |
3634 | record_operand_error_info (const aarch64_opcode *opcode, | |
3635 | aarch64_operand_error *error_info) | |
3636 | { | |
3637 | operand_error_record record; | |
3638 | record.opcode = opcode; | |
3639 | record.detail = *error_info; | |
3640 | add_operand_error_record (&record); | |
3641 | } | |
3642 | ||
3643 | /* Record an error of kind KIND and, if ERROR is not NULL, of the detailed | |
3644 | error message *ERROR, for operand IDX (count from 0). */ | |
3645 | ||
3646 | static void | |
3647 | record_operand_error (const aarch64_opcode *opcode, int idx, | |
3648 | enum aarch64_operand_error_kind kind, | |
3649 | const char* error) | |
3650 | { | |
3651 | aarch64_operand_error info; | |
3652 | memset(&info, 0, sizeof (info)); | |
3653 | info.index = idx; | |
3654 | info.kind = kind; | |
3655 | info.error = error; | |
3656 | record_operand_error_info (opcode, &info); | |
3657 | } | |
3658 | ||
3659 | static void | |
3660 | record_operand_error_with_data (const aarch64_opcode *opcode, int idx, | |
3661 | enum aarch64_operand_error_kind kind, | |
3662 | const char* error, const int *extra_data) | |
3663 | { | |
3664 | aarch64_operand_error info; | |
3665 | info.index = idx; | |
3666 | info.kind = kind; | |
3667 | info.error = error; | |
3668 | info.data[0] = extra_data[0]; | |
3669 | info.data[1] = extra_data[1]; | |
3670 | info.data[2] = extra_data[2]; | |
3671 | record_operand_error_info (opcode, &info); | |
3672 | } | |
3673 | ||
3674 | static void | |
3675 | record_operand_out_of_range_error (const aarch64_opcode *opcode, int idx, | |
3676 | const char* error, int lower_bound, | |
3677 | int upper_bound) | |
3678 | { | |
3679 | int data[3] = {lower_bound, upper_bound, 0}; | |
3680 | record_operand_error_with_data (opcode, idx, AARCH64_OPDE_OUT_OF_RANGE, | |
3681 | error, data); | |
3682 | } | |
3683 | ||
3684 | /* Remove the operand error record for *OPCODE. */ | |
3685 | static void ATTRIBUTE_UNUSED | |
3686 | remove_operand_error_record (const aarch64_opcode *opcode) | |
3687 | { | |
3688 | if (opcode_has_operand_error_p (opcode)) | |
3689 | { | |
3690 | operand_error_record* record = operand_error_report.head; | |
3691 | gas_assert (record != NULL && operand_error_report.tail != NULL); | |
3692 | operand_error_report.head = record->next; | |
3693 | record->next = free_opnd_error_record_nodes; | |
3694 | free_opnd_error_record_nodes = record; | |
3695 | if (operand_error_report.head == NULL) | |
3696 | { | |
3697 | gas_assert (operand_error_report.tail == record); | |
3698 | operand_error_report.tail = NULL; | |
3699 | } | |
3700 | } | |
3701 | } | |
3702 | ||
3703 | /* Given the instruction in *INSTR, return the index of the best matched | |
3704 | qualifier sequence in the list (an array) headed by QUALIFIERS_LIST. | |
3705 | ||
3706 | Return -1 if there is no qualifier sequence; return the first match | |
3707 | if there is multiple matches found. */ | |
3708 | ||
3709 | static int | |
3710 | find_best_match (const aarch64_inst *instr, | |
3711 | const aarch64_opnd_qualifier_seq_t *qualifiers_list) | |
3712 | { | |
3713 | int i, num_opnds, max_num_matched, idx; | |
3714 | ||
3715 | num_opnds = aarch64_num_of_operands (instr->opcode); | |
3716 | if (num_opnds == 0) | |
3717 | { | |
3718 | DEBUG_TRACE ("no operand"); | |
3719 | return -1; | |
3720 | } | |
3721 | ||
3722 | max_num_matched = 0; | |
3723 | idx = -1; | |
3724 | ||
3725 | /* For each pattern. */ | |
3726 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i, ++qualifiers_list) | |
3727 | { | |
3728 | int j, num_matched; | |
3729 | const aarch64_opnd_qualifier_t *qualifiers = *qualifiers_list; | |
3730 | ||
3731 | /* Most opcodes has much fewer patterns in the list. */ | |
3732 | if (empty_qualifier_sequence_p (qualifiers) == TRUE) | |
3733 | { | |
3734 | DEBUG_TRACE_IF (i == 0, "empty list of qualifier sequence"); | |
3735 | if (i != 0 && idx == -1) | |
3736 | /* If nothing has been matched, return the 1st sequence. */ | |
3737 | idx = 0; | |
3738 | break; | |
3739 | } | |
3740 | ||
3741 | for (j = 0, num_matched = 0; j < num_opnds; ++j, ++qualifiers) | |
3742 | if (*qualifiers == instr->operands[j].qualifier) | |
3743 | ++num_matched; | |
3744 | ||
3745 | if (num_matched > max_num_matched) | |
3746 | { | |
3747 | max_num_matched = num_matched; | |
3748 | idx = i; | |
3749 | } | |
3750 | } | |
3751 | ||
3752 | DEBUG_TRACE ("return with %d", idx); | |
3753 | return idx; | |
3754 | } | |
3755 | ||
3756 | /* Assign qualifiers in the qualifier seqence (headed by QUALIFIERS) to the | |
3757 | corresponding operands in *INSTR. */ | |
3758 | ||
3759 | static inline void | |
3760 | assign_qualifier_sequence (aarch64_inst *instr, | |
3761 | const aarch64_opnd_qualifier_t *qualifiers) | |
3762 | { | |
3763 | int i = 0; | |
3764 | int num_opnds = aarch64_num_of_operands (instr->opcode); | |
3765 | gas_assert (num_opnds); | |
3766 | for (i = 0; i < num_opnds; ++i, ++qualifiers) | |
3767 | instr->operands[i].qualifier = *qualifiers; | |
3768 | } | |
3769 | ||
3770 | /* Print operands for the diagnosis purpose. */ | |
3771 | ||
3772 | static void | |
3773 | print_operands (char *buf, const aarch64_opcode *opcode, | |
3774 | const aarch64_opnd_info *opnds) | |
3775 | { | |
3776 | int i; | |
3777 | ||
3778 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3779 | { | |
3780 | const size_t size = 128; | |
3781 | char str[size]; | |
3782 | ||
3783 | /* We regard the opcode operand info more, however we also look into | |
3784 | the inst->operands to support the disassembling of the optional | |
3785 | operand. | |
3786 | The two operand code should be the same in all cases, apart from | |
3787 | when the operand can be optional. */ | |
3788 | if (opcode->operands[i] == AARCH64_OPND_NIL | |
3789 | || opnds[i].type == AARCH64_OPND_NIL) | |
3790 | break; | |
3791 | ||
3792 | /* Generate the operand string in STR. */ | |
3793 | aarch64_print_operand (str, size, 0, opcode, opnds, i, NULL, NULL); | |
3794 | ||
3795 | /* Delimiter. */ | |
3796 | if (str[0] != '\0') | |
3797 | strcat (buf, i == 0 ? " " : ","); | |
3798 | ||
3799 | /* Append the operand string. */ | |
3800 | strcat (buf, str); | |
3801 | } | |
3802 | } | |
3803 | ||
3804 | /* Send to stderr a string as information. */ | |
3805 | ||
3806 | static void | |
3807 | output_info (const char *format, ...) | |
3808 | { | |
3809 | char *file; | |
3810 | unsigned int line; | |
3811 | va_list args; | |
3812 | ||
3813 | as_where (&file, &line); | |
3814 | if (file) | |
3815 | { | |
3816 | if (line != 0) | |
3817 | fprintf (stderr, "%s:%u: ", file, line); | |
3818 | else | |
3819 | fprintf (stderr, "%s: ", file); | |
3820 | } | |
3821 | fprintf (stderr, _("Info: ")); | |
3822 | va_start (args, format); | |
3823 | vfprintf (stderr, format, args); | |
3824 | va_end (args); | |
3825 | (void) putc ('\n', stderr); | |
3826 | } | |
3827 | ||
3828 | /* Output one operand error record. */ | |
3829 | ||
3830 | static void | |
3831 | output_operand_error_record (const operand_error_record *record, char *str) | |
3832 | { | |
3833 | int idx = record->detail.index; | |
3834 | const aarch64_opcode *opcode = record->opcode; | |
3835 | enum aarch64_opnd opd_code = (idx != -1 ? opcode->operands[idx] | |
3836 | : AARCH64_OPND_NIL); | |
3837 | const aarch64_operand_error *detail = &record->detail; | |
3838 | ||
3839 | switch (detail->kind) | |
3840 | { | |
3841 | case AARCH64_OPDE_NIL: | |
3842 | gas_assert (0); | |
3843 | break; | |
3844 | ||
3845 | case AARCH64_OPDE_SYNTAX_ERROR: | |
3846 | case AARCH64_OPDE_RECOVERABLE: | |
3847 | case AARCH64_OPDE_FATAL_SYNTAX_ERROR: | |
3848 | case AARCH64_OPDE_OTHER_ERROR: | |
3849 | gas_assert (idx >= 0); | |
3850 | /* Use the prepared error message if there is, otherwise use the | |
3851 | operand description string to describe the error. */ | |
3852 | if (detail->error != NULL) | |
3853 | { | |
3854 | if (detail->index == -1) | |
3855 | as_bad (_("%s -- `%s'"), detail->error, str); | |
3856 | else | |
3857 | as_bad (_("%s at operand %d -- `%s'"), | |
3858 | detail->error, detail->index + 1, str); | |
3859 | } | |
3860 | else | |
3861 | as_bad (_("operand %d should be %s -- `%s'"), idx + 1, | |
3862 | aarch64_get_operand_desc (opd_code), str); | |
3863 | break; | |
3864 | ||
3865 | case AARCH64_OPDE_INVALID_VARIANT: | |
3866 | as_bad (_("operand mismatch -- `%s'"), str); | |
3867 | if (verbose_error_p) | |
3868 | { | |
3869 | /* We will try to correct the erroneous instruction and also provide | |
3870 | more information e.g. all other valid variants. | |
3871 | ||
3872 | The string representation of the corrected instruction and other | |
3873 | valid variants are generated by | |
3874 | ||
3875 | 1) obtaining the intermediate representation of the erroneous | |
3876 | instruction; | |
3877 | 2) manipulating the IR, e.g. replacing the operand qualifier; | |
3878 | 3) printing out the instruction by calling the printer functions | |
3879 | shared with the disassembler. | |
3880 | ||
3881 | The limitation of this method is that the exact input assembly | |
3882 | line cannot be accurately reproduced in some cases, for example an | |
3883 | optional operand present in the actual assembly line will be | |
3884 | omitted in the output; likewise for the optional syntax rules, | |
3885 | e.g. the # before the immediate. Another limitation is that the | |
3886 | assembly symbols and relocation operations in the assembly line | |
3887 | currently cannot be printed out in the error report. Last but not | |
3888 | least, when there is other error(s) co-exist with this error, the | |
3889 | 'corrected' instruction may be still incorrect, e.g. given | |
3890 | 'ldnp h0,h1,[x0,#6]!' | |
3891 | this diagnosis will provide the version: | |
3892 | 'ldnp s0,s1,[x0,#6]!' | |
3893 | which is still not right. */ | |
3894 | size_t len = strlen (get_mnemonic_name (str)); | |
3895 | int i, qlf_idx; | |
3896 | bfd_boolean result; | |
3897 | const size_t size = 2048; | |
3898 | char buf[size]; | |
3899 | aarch64_inst *inst_base = &inst.base; | |
3900 | const aarch64_opnd_qualifier_seq_t *qualifiers_list; | |
3901 | ||
3902 | /* Init inst. */ | |
3903 | reset_aarch64_instruction (&inst); | |
3904 | inst_base->opcode = opcode; | |
3905 | ||
3906 | /* Reset the error report so that there is no side effect on the | |
3907 | following operand parsing. */ | |
3908 | init_operand_error_report (); | |
3909 | ||
3910 | /* Fill inst. */ | |
3911 | result = parse_operands (str + len, opcode) | |
3912 | && programmer_friendly_fixup (&inst); | |
3913 | gas_assert (result); | |
3914 | result = aarch64_opcode_encode (opcode, inst_base, &inst_base->value, | |
3915 | NULL, NULL); | |
3916 | gas_assert (!result); | |
3917 | ||
3918 | /* Find the most matched qualifier sequence. */ | |
3919 | qlf_idx = find_best_match (inst_base, opcode->qualifiers_list); | |
3920 | gas_assert (qlf_idx > -1); | |
3921 | ||
3922 | /* Assign the qualifiers. */ | |
3923 | assign_qualifier_sequence (inst_base, | |
3924 | opcode->qualifiers_list[qlf_idx]); | |
3925 | ||
3926 | /* Print the hint. */ | |
3927 | output_info (_(" did you mean this?")); | |
3928 | snprintf (buf, size, "\t%s", get_mnemonic_name (str)); | |
3929 | print_operands (buf, opcode, inst_base->operands); | |
3930 | output_info (_(" %s"), buf); | |
3931 | ||
3932 | /* Print out other variant(s) if there is any. */ | |
3933 | if (qlf_idx != 0 || | |
3934 | !empty_qualifier_sequence_p (opcode->qualifiers_list[1])) | |
3935 | output_info (_(" other valid variant(s):")); | |
3936 | ||
3937 | /* For each pattern. */ | |
3938 | qualifiers_list = opcode->qualifiers_list; | |
3939 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i, ++qualifiers_list) | |
3940 | { | |
3941 | /* Most opcodes has much fewer patterns in the list. | |
3942 | First NIL qualifier indicates the end in the list. */ | |
3943 | if (empty_qualifier_sequence_p (*qualifiers_list) == TRUE) | |
3944 | break; | |
3945 | ||
3946 | if (i != qlf_idx) | |
3947 | { | |
3948 | /* Mnemonics name. */ | |
3949 | snprintf (buf, size, "\t%s", get_mnemonic_name (str)); | |
3950 | ||
3951 | /* Assign the qualifiers. */ | |
3952 | assign_qualifier_sequence (inst_base, *qualifiers_list); | |
3953 | ||
3954 | /* Print instruction. */ | |
3955 | print_operands (buf, opcode, inst_base->operands); | |
3956 | ||
3957 | output_info (_(" %s"), buf); | |
3958 | } | |
3959 | } | |
3960 | } | |
3961 | break; | |
3962 | ||
3963 | case AARCH64_OPDE_OUT_OF_RANGE: | |
3964 | as_bad (_("%s out of range %d to %d at operand %d -- `%s'"), | |
3965 | detail->error ? detail->error : _("immediate value"), | |
3966 | detail->data[0], detail->data[1], detail->index + 1, str); | |
3967 | break; | |
3968 | ||
3969 | case AARCH64_OPDE_REG_LIST: | |
3970 | if (detail->data[0] == 1) | |
3971 | as_bad (_("invalid number of registers in the list; " | |
3972 | "only 1 register is expected at operand %d -- `%s'"), | |
3973 | detail->index + 1, str); | |
3974 | else | |
3975 | as_bad (_("invalid number of registers in the list; " | |
3976 | "%d registers are expected at operand %d -- `%s'"), | |
3977 | detail->data[0], detail->index + 1, str); | |
3978 | break; | |
3979 | ||
3980 | case AARCH64_OPDE_UNALIGNED: | |
3981 | as_bad (_("immediate value should be a multiple of " | |
3982 | "%d at operand %d -- `%s'"), | |
3983 | detail->data[0], detail->index + 1, str); | |
3984 | break; | |
3985 | ||
3986 | default: | |
3987 | gas_assert (0); | |
3988 | break; | |
3989 | } | |
3990 | } | |
3991 | ||
3992 | /* Process and output the error message about the operand mismatching. | |
3993 | ||
3994 | When this function is called, the operand error information had | |
3995 | been collected for an assembly line and there will be multiple | |
3996 | errors in the case of mulitple instruction templates; output the | |
3997 | error message that most closely describes the problem. */ | |
3998 | ||
3999 | static void | |
4000 | output_operand_error_report (char *str) | |
4001 | { | |
4002 | int largest_error_pos; | |
4003 | const char *msg = NULL; | |
4004 | enum aarch64_operand_error_kind kind; | |
4005 | operand_error_record *curr; | |
4006 | operand_error_record *head = operand_error_report.head; | |
4007 | operand_error_record *record = NULL; | |
4008 | ||
4009 | /* No error to report. */ | |
4010 | if (head == NULL) | |
4011 | return; | |
4012 | ||
4013 | gas_assert (head != NULL && operand_error_report.tail != NULL); | |
4014 | ||
4015 | /* Only one error. */ | |
4016 | if (head == operand_error_report.tail) | |
4017 | { | |
4018 | DEBUG_TRACE ("single opcode entry with error kind: %s", | |
4019 | operand_mismatch_kind_names[head->detail.kind]); | |
4020 | output_operand_error_record (head, str); | |
4021 | return; | |
4022 | } | |
4023 | ||
4024 | /* Find the error kind of the highest severity. */ | |
4025 | DEBUG_TRACE ("multiple opcode entres with error kind"); | |
4026 | kind = AARCH64_OPDE_NIL; | |
4027 | for (curr = head; curr != NULL; curr = curr->next) | |
4028 | { | |
4029 | gas_assert (curr->detail.kind != AARCH64_OPDE_NIL); | |
4030 | DEBUG_TRACE ("\t%s", operand_mismatch_kind_names[curr->detail.kind]); | |
4031 | if (operand_error_higher_severity_p (curr->detail.kind, kind)) | |
4032 | kind = curr->detail.kind; | |
4033 | } | |
4034 | gas_assert (kind != AARCH64_OPDE_NIL); | |
4035 | ||
4036 | /* Pick up one of errors of KIND to report. */ | |
4037 | largest_error_pos = -2; /* Index can be -1 which means unknown index. */ | |
4038 | for (curr = head; curr != NULL; curr = curr->next) | |
4039 | { | |
4040 | if (curr->detail.kind != kind) | |
4041 | continue; | |
4042 | /* If there are multiple errors, pick up the one with the highest | |
4043 | mismatching operand index. In the case of multiple errors with | |
4044 | the equally highest operand index, pick up the first one or the | |
4045 | first one with non-NULL error message. */ | |
4046 | if (curr->detail.index > largest_error_pos | |
4047 | || (curr->detail.index == largest_error_pos && msg == NULL | |
4048 | && curr->detail.error != NULL)) | |
4049 | { | |
4050 | largest_error_pos = curr->detail.index; | |
4051 | record = curr; | |
4052 | msg = record->detail.error; | |
4053 | } | |
4054 | } | |
4055 | ||
4056 | gas_assert (largest_error_pos != -2 && record != NULL); | |
4057 | DEBUG_TRACE ("Pick up error kind %s to report", | |
4058 | operand_mismatch_kind_names[record->detail.kind]); | |
4059 | ||
4060 | /* Output. */ | |
4061 | output_operand_error_record (record, str); | |
4062 | } | |
4063 | \f | |
4064 | /* Write an AARCH64 instruction to buf - always little-endian. */ | |
4065 | static void | |
4066 | put_aarch64_insn (char *buf, uint32_t insn) | |
4067 | { | |
4068 | unsigned char *where = (unsigned char *) buf; | |
4069 | where[0] = insn; | |
4070 | where[1] = insn >> 8; | |
4071 | where[2] = insn >> 16; | |
4072 | where[3] = insn >> 24; | |
4073 | } | |
4074 | ||
4075 | static uint32_t | |
4076 | get_aarch64_insn (char *buf) | |
4077 | { | |
4078 | unsigned char *where = (unsigned char *) buf; | |
4079 | uint32_t result; | |
4080 | result = (where[0] | (where[1] << 8) | (where[2] << 16) | (where[3] << 24)); | |
4081 | return result; | |
4082 | } | |
4083 | ||
4084 | static void | |
4085 | output_inst (struct aarch64_inst *new_inst) | |
4086 | { | |
4087 | char *to = NULL; | |
4088 | ||
4089 | to = frag_more (INSN_SIZE); | |
4090 | ||
4091 | frag_now->tc_frag_data.recorded = 1; | |
4092 | ||
4093 | put_aarch64_insn (to, inst.base.value); | |
4094 | ||
4095 | if (inst.reloc.type != BFD_RELOC_UNUSED) | |
4096 | { | |
4097 | fixS *fixp = fix_new_aarch64 (frag_now, to - frag_now->fr_literal, | |
4098 | INSN_SIZE, &inst.reloc.exp, | |
4099 | inst.reloc.pc_rel, | |
4100 | inst.reloc.type); | |
4101 | DEBUG_TRACE ("Prepared relocation fix up"); | |
4102 | /* Don't check the addend value against the instruction size, | |
4103 | that's the job of our code in md_apply_fix(). */ | |
4104 | fixp->fx_no_overflow = 1; | |
4105 | if (new_inst != NULL) | |
4106 | fixp->tc_fix_data.inst = new_inst; | |
4107 | if (aarch64_gas_internal_fixup_p ()) | |
4108 | { | |
4109 | gas_assert (inst.reloc.opnd != AARCH64_OPND_NIL); | |
4110 | fixp->tc_fix_data.opnd = inst.reloc.opnd; | |
4111 | fixp->fx_addnumber = inst.reloc.flags; | |
4112 | } | |
4113 | } | |
4114 | ||
4115 | dwarf2_emit_insn (INSN_SIZE); | |
4116 | } | |
4117 | ||
4118 | /* Link together opcodes of the same name. */ | |
4119 | ||
4120 | struct templates | |
4121 | { | |
4122 | aarch64_opcode *opcode; | |
4123 | struct templates *next; | |
4124 | }; | |
4125 | ||
4126 | typedef struct templates templates; | |
4127 | ||
4128 | static templates * | |
4129 | lookup_mnemonic (const char *start, int len) | |
4130 | { | |
4131 | templates *templ = NULL; | |
4132 | ||
4133 | templ = hash_find_n (aarch64_ops_hsh, start, len); | |
4134 | return templ; | |
4135 | } | |
4136 | ||
4137 | /* Subroutine of md_assemble, responsible for looking up the primary | |
4138 | opcode from the mnemonic the user wrote. STR points to the | |
4139 | beginning of the mnemonic. */ | |
4140 | ||
4141 | static templates * | |
4142 | opcode_lookup (char **str) | |
4143 | { | |
4144 | char *end, *base; | |
4145 | const aarch64_cond *cond; | |
4146 | char condname[16]; | |
4147 | int len; | |
4148 | ||
4149 | /* Scan up to the end of the mnemonic, which must end in white space, | |
4150 | '.', or end of string. */ | |
4151 | for (base = end = *str; is_part_of_name(*end); end++) | |
4152 | if (*end == '.') | |
4153 | break; | |
4154 | ||
4155 | if (end == base) | |
4156 | return 0; | |
4157 | ||
4158 | inst.cond = COND_ALWAYS; | |
4159 | ||
4160 | /* Handle a possible condition. */ | |
4161 | if (end[0] == '.') | |
4162 | { | |
4163 | cond = hash_find_n (aarch64_cond_hsh, end + 1, 2); | |
4164 | if (cond) | |
4165 | { | |
4166 | inst.cond = cond->value; | |
4167 | *str = end + 3; | |
4168 | } | |
4169 | else | |
4170 | { | |
4171 | *str = end; | |
4172 | return 0; | |
4173 | } | |
4174 | } | |
4175 | else | |
4176 | *str = end; | |
4177 | ||
4178 | len = end - base; | |
4179 | ||
4180 | if (inst.cond == COND_ALWAYS) | |
4181 | { | |
4182 | /* Look for unaffixed mnemonic. */ | |
4183 | return lookup_mnemonic (base, len); | |
4184 | } | |
4185 | else if (len <= 13) | |
4186 | { | |
4187 | /* append ".c" to mnemonic if conditional */ | |
4188 | memcpy (condname, base, len); | |
4189 | memcpy (condname + len, ".c", 2); | |
4190 | base = condname; | |
4191 | len += 2; | |
4192 | return lookup_mnemonic (base, len); | |
4193 | } | |
4194 | ||
4195 | return NULL; | |
4196 | } | |
4197 | ||
4198 | /* Internal helper routine converting a vector neon_type_el structure | |
4199 | *VECTYPE to a corresponding operand qualifier. */ | |
4200 | ||
4201 | static inline aarch64_opnd_qualifier_t | |
4202 | vectype_to_qualifier (const struct neon_type_el *vectype) | |
4203 | { | |
4204 | /* Element size in bytes indexed by neon_el_type. */ | |
4205 | const unsigned char ele_size[5] | |
4206 | = {1, 2, 4, 8, 16}; | |
4207 | ||
4208 | if (!vectype->defined || vectype->type == NT_invtype) | |
4209 | goto vectype_conversion_fail; | |
4210 | ||
4211 | gas_assert (vectype->type >= NT_b && vectype->type <= NT_q); | |
4212 | ||
4213 | if (vectype->defined & NTA_HASINDEX) | |
4214 | /* Vector element register. */ | |
4215 | return AARCH64_OPND_QLF_S_B + vectype->type; | |
4216 | else | |
4217 | { | |
4218 | /* Vector register. */ | |
4219 | int reg_size = ele_size[vectype->type] * vectype->width; | |
4220 | unsigned offset; | |
4221 | if (reg_size != 16 && reg_size != 8) | |
4222 | goto vectype_conversion_fail; | |
4223 | /* The conversion is calculated based on the relation of the order of | |
4224 | qualifiers to the vector element size and vector register size. */ | |
4225 | offset = (vectype->type == NT_q) | |
4226 | ? 8 : (vectype->type << 1) + (reg_size >> 4); | |
4227 | gas_assert (offset <= 8); | |
4228 | return AARCH64_OPND_QLF_V_8B + offset; | |
4229 | } | |
4230 | ||
4231 | vectype_conversion_fail: | |
4232 | first_error (_("bad vector arrangement type")); | |
4233 | return AARCH64_OPND_QLF_NIL; | |
4234 | } | |
4235 | ||
4236 | /* Process an optional operand that is found omitted from the assembly line. | |
4237 | Fill *OPERAND for such an operand of type TYPE. OPCODE points to the | |
4238 | instruction's opcode entry while IDX is the index of this omitted operand. | |
4239 | */ | |
4240 | ||
4241 | static void | |
4242 | process_omitted_operand (enum aarch64_opnd type, const aarch64_opcode *opcode, | |
4243 | int idx, aarch64_opnd_info *operand) | |
4244 | { | |
4245 | aarch64_insn default_value = get_optional_operand_default_value (opcode); | |
4246 | gas_assert (optional_operand_p (opcode, idx)); | |
4247 | gas_assert (!operand->present); | |
4248 | ||
4249 | switch (type) | |
4250 | { | |
4251 | case AARCH64_OPND_Rd: | |
4252 | case AARCH64_OPND_Rn: | |
4253 | case AARCH64_OPND_Rm: | |
4254 | case AARCH64_OPND_Rt: | |
4255 | case AARCH64_OPND_Rt2: | |
4256 | case AARCH64_OPND_Rs: | |
4257 | case AARCH64_OPND_Ra: | |
4258 | case AARCH64_OPND_Rt_SYS: | |
4259 | case AARCH64_OPND_Rd_SP: | |
4260 | case AARCH64_OPND_Rn_SP: | |
4261 | case AARCH64_OPND_Fd: | |
4262 | case AARCH64_OPND_Fn: | |
4263 | case AARCH64_OPND_Fm: | |
4264 | case AARCH64_OPND_Fa: | |
4265 | case AARCH64_OPND_Ft: | |
4266 | case AARCH64_OPND_Ft2: | |
4267 | case AARCH64_OPND_Sd: | |
4268 | case AARCH64_OPND_Sn: | |
4269 | case AARCH64_OPND_Sm: | |
4270 | case AARCH64_OPND_Vd: | |
4271 | case AARCH64_OPND_Vn: | |
4272 | case AARCH64_OPND_Vm: | |
4273 | case AARCH64_OPND_VdD1: | |
4274 | case AARCH64_OPND_VnD1: | |
4275 | operand->reg.regno = default_value; | |
4276 | break; | |
4277 | ||
4278 | case AARCH64_OPND_Ed: | |
4279 | case AARCH64_OPND_En: | |
4280 | case AARCH64_OPND_Em: | |
4281 | operand->reglane.regno = default_value; | |
4282 | break; | |
4283 | ||
4284 | case AARCH64_OPND_IDX: | |
4285 | case AARCH64_OPND_BIT_NUM: | |
4286 | case AARCH64_OPND_IMMR: | |
4287 | case AARCH64_OPND_IMMS: | |
4288 | case AARCH64_OPND_SHLL_IMM: | |
4289 | case AARCH64_OPND_IMM_VLSL: | |
4290 | case AARCH64_OPND_IMM_VLSR: | |
4291 | case AARCH64_OPND_CCMP_IMM: | |
4292 | case AARCH64_OPND_FBITS: | |
4293 | case AARCH64_OPND_UIMM4: | |
4294 | case AARCH64_OPND_UIMM3_OP1: | |
4295 | case AARCH64_OPND_UIMM3_OP2: | |
4296 | case AARCH64_OPND_IMM: | |
4297 | case AARCH64_OPND_WIDTH: | |
4298 | case AARCH64_OPND_UIMM7: | |
4299 | case AARCH64_OPND_NZCV: | |
4300 | operand->imm.value = default_value; | |
4301 | break; | |
4302 | ||
4303 | case AARCH64_OPND_EXCEPTION: | |
4304 | inst.reloc.type = BFD_RELOC_UNUSED; | |
4305 | break; | |
4306 | ||
4307 | case AARCH64_OPND_BARRIER_ISB: | |
4308 | operand->barrier = aarch64_barrier_options + default_value; | |
4309 | ||
4310 | default: | |
4311 | break; | |
4312 | } | |
4313 | } | |
4314 | ||
4315 | /* Process the relocation type for move wide instructions. | |
4316 | Return TRUE on success; otherwise return FALSE. */ | |
4317 | ||
4318 | static bfd_boolean | |
4319 | process_movw_reloc_info (void) | |
4320 | { | |
4321 | int is32; | |
4322 | unsigned shift; | |
4323 | ||
4324 | is32 = inst.base.operands[0].qualifier == AARCH64_OPND_QLF_W ? 1 : 0; | |
4325 | ||
4326 | if (inst.base.opcode->op == OP_MOVK) | |
4327 | switch (inst.reloc.type) | |
4328 | { | |
4329 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
4330 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
4331 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
4332 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4333 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4334 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4335 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4336 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4337 | set_syntax_error | |
4338 | (_("the specified relocation type is not allowed for MOVK")); | |
4339 | return FALSE; | |
4340 | default: | |
4341 | break; | |
4342 | } | |
4343 | ||
4344 | switch (inst.reloc.type) | |
4345 | { | |
4346 | case BFD_RELOC_AARCH64_MOVW_G0: | |
4347 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
4348 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
4349 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4350 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4351 | shift = 0; | |
4352 | break; | |
4353 | case BFD_RELOC_AARCH64_MOVW_G1: | |
4354 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
4355 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
4356 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4357 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4358 | shift = 16; | |
4359 | break; | |
4360 | case BFD_RELOC_AARCH64_MOVW_G2: | |
4361 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
4362 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
4363 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4364 | if (is32) | |
4365 | { | |
4366 | set_fatal_syntax_error | |
4367 | (_("the specified relocation type is not allowed for 32-bit " | |
4368 | "register")); | |
4369 | return FALSE; | |
4370 | } | |
4371 | shift = 32; | |
4372 | break; | |
4373 | case BFD_RELOC_AARCH64_MOVW_G3: | |
4374 | if (is32) | |
4375 | { | |
4376 | set_fatal_syntax_error | |
4377 | (_("the specified relocation type is not allowed for 32-bit " | |
4378 | "register")); | |
4379 | return FALSE; | |
4380 | } | |
4381 | shift = 48; | |
4382 | break; | |
4383 | default: | |
4384 | /* More cases should be added when more MOVW-related relocation types | |
4385 | are supported in GAS. */ | |
4386 | gas_assert (aarch64_gas_internal_fixup_p ()); | |
4387 | /* The shift amount should have already been set by the parser. */ | |
4388 | return TRUE; | |
4389 | } | |
4390 | inst.base.operands[1].shifter.amount = shift; | |
4391 | return TRUE; | |
4392 | } | |
4393 | ||
4394 | /* A primitive log caculator. */ | |
4395 | ||
4396 | static inline unsigned int | |
4397 | get_logsz (unsigned int size) | |
4398 | { | |
4399 | const unsigned char ls[16] = | |
4400 | {0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, 4}; | |
4401 | if (size > 16) | |
4402 | { | |
4403 | gas_assert (0); | |
4404 | return -1; | |
4405 | } | |
4406 | gas_assert (ls[size - 1] != (unsigned char)-1); | |
4407 | return ls[size - 1]; | |
4408 | } | |
4409 | ||
4410 | /* Determine and return the real reloc type code for an instruction | |
4411 | with the pseudo reloc type code BFD_RELOC_AARCH64_LDST_LO12. */ | |
4412 | ||
4413 | static inline bfd_reloc_code_real_type | |
4414 | ldst_lo12_determine_real_reloc_type (void) | |
4415 | { | |
4416 | int logsz; | |
4417 | enum aarch64_opnd_qualifier opd0_qlf = inst.base.operands[0].qualifier; | |
4418 | enum aarch64_opnd_qualifier opd1_qlf = inst.base.operands[1].qualifier; | |
4419 | ||
4420 | const bfd_reloc_code_real_type reloc_ldst_lo12[5] = { | |
4421 | BFD_RELOC_AARCH64_LDST8_LO12, BFD_RELOC_AARCH64_LDST16_LO12, | |
4422 | BFD_RELOC_AARCH64_LDST32_LO12, BFD_RELOC_AARCH64_LDST64_LO12, | |
4423 | BFD_RELOC_AARCH64_LDST128_LO12 | |
4424 | }; | |
4425 | ||
4426 | gas_assert (inst.reloc.type == BFD_RELOC_AARCH64_LDST_LO12); | |
4427 | gas_assert (inst.base.opcode->operands[1] == AARCH64_OPND_ADDR_UIMM12); | |
4428 | ||
4429 | if (opd1_qlf == AARCH64_OPND_QLF_NIL) | |
4430 | opd1_qlf = | |
4431 | aarch64_get_expected_qualifier (inst.base.opcode->qualifiers_list, | |
4432 | 1, opd0_qlf, 0); | |
4433 | gas_assert (opd1_qlf != AARCH64_OPND_QLF_NIL); | |
4434 | ||
4435 | logsz = get_logsz (aarch64_get_qualifier_esize (opd1_qlf)); | |
4436 | gas_assert (logsz >= 0 && logsz <= 4); | |
4437 | ||
4438 | return reloc_ldst_lo12[logsz]; | |
4439 | } | |
4440 | ||
4441 | /* Check whether a register list REGINFO is valid. The registers must be | |
4442 | numbered in increasing order (modulo 32), in increments of one or two. | |
4443 | ||
4444 | If ACCEPT_ALTERNATE is non-zero, the register numbers should be in | |
4445 | increments of two. | |
4446 | ||
4447 | Return FALSE if such a register list is invalid, otherwise return TRUE. */ | |
4448 | ||
4449 | static bfd_boolean | |
4450 | reg_list_valid_p (uint32_t reginfo, int accept_alternate) | |
4451 | { | |
4452 | uint32_t i, nb_regs, prev_regno, incr; | |
4453 | ||
4454 | nb_regs = 1 + (reginfo & 0x3); | |
4455 | reginfo >>= 2; | |
4456 | prev_regno = reginfo & 0x1f; | |
4457 | incr = accept_alternate ? 2 : 1; | |
4458 | ||
4459 | for (i = 1; i < nb_regs; ++i) | |
4460 | { | |
4461 | uint32_t curr_regno; | |
4462 | reginfo >>= 5; | |
4463 | curr_regno = reginfo & 0x1f; | |
4464 | if (curr_regno != ((prev_regno + incr) & 0x1f)) | |
4465 | return FALSE; | |
4466 | prev_regno = curr_regno; | |
4467 | } | |
4468 | ||
4469 | return TRUE; | |
4470 | } | |
4471 | ||
4472 | /* Generic instruction operand parser. This does no encoding and no | |
4473 | semantic validation; it merely squirrels values away in the inst | |
4474 | structure. Returns TRUE or FALSE depending on whether the | |
4475 | specified grammar matched. */ | |
4476 | ||
4477 | static bfd_boolean | |
4478 | parse_operands (char *str, const aarch64_opcode *opcode) | |
4479 | { | |
4480 | int i; | |
4481 | char *backtrack_pos = 0; | |
4482 | const enum aarch64_opnd *operands = opcode->operands; | |
4483 | ||
4484 | clear_error (); | |
4485 | skip_whitespace (str); | |
4486 | ||
4487 | for (i = 0; operands[i] != AARCH64_OPND_NIL; i++) | |
4488 | { | |
4489 | int64_t val; | |
4490 | int isreg32, isregzero; | |
4491 | int comma_skipped_p = 0; | |
4492 | aarch64_reg_type rtype; | |
4493 | struct neon_type_el vectype; | |
4494 | aarch64_opnd_info *info = &inst.base.operands[i]; | |
4495 | ||
4496 | DEBUG_TRACE ("parse operand %d", i); | |
4497 | ||
4498 | /* Assign the operand code. */ | |
4499 | info->type = operands[i]; | |
4500 | ||
4501 | if (optional_operand_p (opcode, i)) | |
4502 | { | |
4503 | /* Remember where we are in case we need to backtrack. */ | |
4504 | gas_assert (!backtrack_pos); | |
4505 | backtrack_pos = str; | |
4506 | } | |
4507 | ||
4508 | /* Expect comma between operands; the backtrack mechanizm will take | |
4509 | care of cases of omitted optional operand. */ | |
4510 | if (i > 0 && ! skip_past_char (&str, ',')) | |
4511 | { | |
4512 | set_syntax_error (_("comma expected between operands")); | |
4513 | goto failure; | |
4514 | } | |
4515 | else | |
4516 | comma_skipped_p = 1; | |
4517 | ||
4518 | switch (operands[i]) | |
4519 | { | |
4520 | case AARCH64_OPND_Rd: | |
4521 | case AARCH64_OPND_Rn: | |
4522 | case AARCH64_OPND_Rm: | |
4523 | case AARCH64_OPND_Rt: | |
4524 | case AARCH64_OPND_Rt2: | |
4525 | case AARCH64_OPND_Rs: | |
4526 | case AARCH64_OPND_Ra: | |
4527 | case AARCH64_OPND_Rt_SYS: | |
4528 | po_int_reg_or_fail (1, 0); | |
4529 | break; | |
4530 | ||
4531 | case AARCH64_OPND_Rd_SP: | |
4532 | case AARCH64_OPND_Rn_SP: | |
4533 | po_int_reg_or_fail (0, 1); | |
4534 | break; | |
4535 | ||
4536 | case AARCH64_OPND_Rm_EXT: | |
4537 | case AARCH64_OPND_Rm_SFT: | |
4538 | po_misc_or_fail (parse_shifter_operand | |
4539 | (&str, info, (operands[i] == AARCH64_OPND_Rm_EXT | |
4540 | ? SHIFTED_ARITH_IMM | |
4541 | : SHIFTED_LOGIC_IMM))); | |
4542 | if (!info->shifter.operator_present) | |
4543 | { | |
4544 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4545 | kind to be explicit. */ | |
4546 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4547 | info->shifter.kind = AARCH64_MOD_LSL; | |
4548 | /* For Rm_EXT, libopcodes will carry out further check on whether | |
4549 | or not stack pointer is used in the instruction (Recall that | |
4550 | "the extend operator is not optional unless at least one of | |
4551 | "Rd" or "Rn" is '11111' (i.e. WSP)"). */ | |
4552 | } | |
4553 | break; | |
4554 | ||
4555 | case AARCH64_OPND_Fd: | |
4556 | case AARCH64_OPND_Fn: | |
4557 | case AARCH64_OPND_Fm: | |
4558 | case AARCH64_OPND_Fa: | |
4559 | case AARCH64_OPND_Ft: | |
4560 | case AARCH64_OPND_Ft2: | |
4561 | case AARCH64_OPND_Sd: | |
4562 | case AARCH64_OPND_Sn: | |
4563 | case AARCH64_OPND_Sm: | |
4564 | val = aarch64_reg_parse (&str, REG_TYPE_BHSDQ, &rtype, NULL); | |
4565 | if (val == PARSE_FAIL) | |
4566 | { | |
4567 | first_error (_(get_reg_expected_msg (REG_TYPE_BHSDQ))); | |
4568 | goto failure; | |
4569 | } | |
4570 | gas_assert (rtype >= REG_TYPE_FP_B && rtype <= REG_TYPE_FP_Q); | |
4571 | ||
4572 | info->reg.regno = val; | |
4573 | info->qualifier = AARCH64_OPND_QLF_S_B + (rtype - REG_TYPE_FP_B); | |
4574 | break; | |
4575 | ||
4576 | case AARCH64_OPND_Vd: | |
4577 | case AARCH64_OPND_Vn: | |
4578 | case AARCH64_OPND_Vm: | |
4579 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4580 | if (val == PARSE_FAIL) | |
4581 | { | |
4582 | first_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4583 | goto failure; | |
4584 | } | |
4585 | if (vectype.defined & NTA_HASINDEX) | |
4586 | goto failure; | |
4587 | ||
4588 | info->reg.regno = val; | |
4589 | info->qualifier = vectype_to_qualifier (&vectype); | |
4590 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4591 | goto failure; | |
4592 | break; | |
4593 | ||
4594 | case AARCH64_OPND_VdD1: | |
4595 | case AARCH64_OPND_VnD1: | |
4596 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4597 | if (val == PARSE_FAIL) | |
4598 | { | |
4599 | set_first_syntax_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4600 | goto failure; | |
4601 | } | |
4602 | if (vectype.type != NT_d || vectype.index != 1) | |
4603 | { | |
4604 | set_fatal_syntax_error | |
4605 | (_("the top half of a 128-bit FP/SIMD register is expected")); | |
4606 | goto failure; | |
4607 | } | |
4608 | info->reg.regno = val; | |
4609 | /* N.B: VdD1 and VnD1 are treated as an fp or advsimd scalar register | |
4610 | here; it is correct for the purpose of encoding/decoding since | |
4611 | only the register number is explicitly encoded in the related | |
4612 | instructions, although this appears a bit hacky. */ | |
4613 | info->qualifier = AARCH64_OPND_QLF_S_D; | |
4614 | break; | |
4615 | ||
4616 | case AARCH64_OPND_Ed: | |
4617 | case AARCH64_OPND_En: | |
4618 | case AARCH64_OPND_Em: | |
4619 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4620 | if (val == PARSE_FAIL) | |
4621 | { | |
4622 | first_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4623 | goto failure; | |
4624 | } | |
4625 | if (vectype.type == NT_invtype || !(vectype.defined & NTA_HASINDEX)) | |
4626 | goto failure; | |
4627 | ||
4628 | info->reglane.regno = val; | |
4629 | info->reglane.index = vectype.index; | |
4630 | info->qualifier = vectype_to_qualifier (&vectype); | |
4631 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4632 | goto failure; | |
4633 | break; | |
4634 | ||
4635 | case AARCH64_OPND_LVn: | |
4636 | case AARCH64_OPND_LVt: | |
4637 | case AARCH64_OPND_LVt_AL: | |
4638 | case AARCH64_OPND_LEt: | |
4639 | if ((val = parse_neon_reg_list (&str, &vectype)) == PARSE_FAIL) | |
4640 | goto failure; | |
4641 | if (! reg_list_valid_p (val, /* accept_alternate */ 0)) | |
4642 | { | |
4643 | set_fatal_syntax_error (_("invalid register list")); | |
4644 | goto failure; | |
4645 | } | |
4646 | info->reglist.first_regno = (val >> 2) & 0x1f; | |
4647 | info->reglist.num_regs = (val & 0x3) + 1; | |
4648 | if (operands[i] == AARCH64_OPND_LEt) | |
4649 | { | |
4650 | if (!(vectype.defined & NTA_HASINDEX)) | |
4651 | goto failure; | |
4652 | info->reglist.has_index = 1; | |
4653 | info->reglist.index = vectype.index; | |
4654 | } | |
4655 | else if (!(vectype.defined & NTA_HASTYPE)) | |
4656 | goto failure; | |
4657 | info->qualifier = vectype_to_qualifier (&vectype); | |
4658 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4659 | goto failure; | |
4660 | break; | |
4661 | ||
4662 | case AARCH64_OPND_Cn: | |
4663 | case AARCH64_OPND_Cm: | |
4664 | po_reg_or_fail (REG_TYPE_CN); | |
4665 | if (val > 15) | |
4666 | { | |
4667 | set_fatal_syntax_error (_(get_reg_expected_msg (REG_TYPE_CN))); | |
4668 | goto failure; | |
4669 | } | |
4670 | inst.base.operands[i].reg.regno = val; | |
4671 | break; | |
4672 | ||
4673 | case AARCH64_OPND_SHLL_IMM: | |
4674 | case AARCH64_OPND_IMM_VLSR: | |
4675 | po_imm_or_fail (1, 64); | |
4676 | info->imm.value = val; | |
4677 | break; | |
4678 | ||
4679 | case AARCH64_OPND_CCMP_IMM: | |
4680 | case AARCH64_OPND_FBITS: | |
4681 | case AARCH64_OPND_UIMM4: | |
4682 | case AARCH64_OPND_UIMM3_OP1: | |
4683 | case AARCH64_OPND_UIMM3_OP2: | |
4684 | case AARCH64_OPND_IMM_VLSL: | |
4685 | case AARCH64_OPND_IMM: | |
4686 | case AARCH64_OPND_WIDTH: | |
4687 | po_imm_nc_or_fail (); | |
4688 | info->imm.value = val; | |
4689 | break; | |
4690 | ||
4691 | case AARCH64_OPND_UIMM7: | |
4692 | po_imm_or_fail (0, 127); | |
4693 | info->imm.value = val; | |
4694 | break; | |
4695 | ||
4696 | case AARCH64_OPND_IDX: | |
4697 | case AARCH64_OPND_BIT_NUM: | |
4698 | case AARCH64_OPND_IMMR: | |
4699 | case AARCH64_OPND_IMMS: | |
4700 | po_imm_or_fail (0, 63); | |
4701 | info->imm.value = val; | |
4702 | break; | |
4703 | ||
4704 | case AARCH64_OPND_IMM0: | |
4705 | po_imm_nc_or_fail (); | |
4706 | if (val != 0) | |
4707 | { | |
4708 | set_fatal_syntax_error (_("immediate zero expected")); | |
4709 | goto failure; | |
4710 | } | |
4711 | info->imm.value = 0; | |
4712 | break; | |
4713 | ||
4714 | case AARCH64_OPND_FPIMM0: | |
4715 | { | |
4716 | int qfloat; | |
4717 | bfd_boolean res1 = FALSE, res2 = FALSE; | |
4718 | /* N.B. -0.0 will be rejected; although -0.0 shouldn't be rejected, | |
4719 | it is probably not worth the effort to support it. */ | |
4720 | if (!(res1 = parse_aarch64_imm_float (&str, &qfloat)) | |
4721 | && !(res2 = parse_constant_immediate (&str, &val))) | |
4722 | goto failure; | |
4723 | if ((res1 && qfloat == 0) || (res2 && val == 0)) | |
4724 | { | |
4725 | info->imm.value = 0; | |
4726 | info->imm.is_fp = 1; | |
4727 | break; | |
4728 | } | |
4729 | set_fatal_syntax_error (_("immediate zero expected")); | |
4730 | goto failure; | |
4731 | } | |
4732 | ||
4733 | case AARCH64_OPND_IMM_MOV: | |
4734 | { | |
4735 | char *saved = str; | |
4736 | if (reg_name_p (str, REG_TYPE_R_Z_SP)) | |
4737 | goto failure; | |
4738 | str = saved; | |
4739 | po_misc_or_fail (my_get_expression (&inst.reloc.exp, &str, | |
4740 | GE_OPT_PREFIX, 1)); | |
4741 | /* The MOV immediate alias will be fixed up by fix_mov_imm_insn | |
4742 | later. fix_mov_imm_insn will try to determine a machine | |
4743 | instruction (MOVZ, MOVN or ORR) for it and will issue an error | |
4744 | message if the immediate cannot be moved by a single | |
4745 | instruction. */ | |
4746 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 1); | |
4747 | inst.base.operands[i].skip = 1; | |
4748 | } | |
4749 | break; | |
4750 | ||
4751 | case AARCH64_OPND_SIMD_IMM: | |
4752 | case AARCH64_OPND_SIMD_IMM_SFT: | |
4753 | if (! parse_big_immediate (&str, &val)) | |
4754 | goto failure; | |
4755 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4756 | /* addr_off_p */ 0, | |
4757 | /* need_libopcodes_p */ 1, | |
4758 | /* skip_p */ 1); | |
4759 | /* Parse shift. | |
4760 | N.B. although AARCH64_OPND_SIMD_IMM doesn't permit any | |
4761 | shift, we don't check it here; we leave the checking to | |
4762 | the libopcodes (operand_general_constraint_met_p). By | |
4763 | doing this, we achieve better diagnostics. */ | |
4764 | if (skip_past_comma (&str) | |
4765 | && ! parse_shift (&str, info, SHIFTED_LSL_MSL)) | |
4766 | goto failure; | |
4767 | if (!info->shifter.operator_present | |
4768 | && info->type == AARCH64_OPND_SIMD_IMM_SFT) | |
4769 | { | |
4770 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4771 | kind to be explicit. */ | |
4772 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4773 | info->shifter.kind = AARCH64_MOD_LSL; | |
4774 | } | |
4775 | break; | |
4776 | ||
4777 | case AARCH64_OPND_FPIMM: | |
4778 | case AARCH64_OPND_SIMD_FPIMM: | |
4779 | { | |
4780 | int qfloat; | |
4781 | if (! parse_aarch64_imm_float (&str, &qfloat)) | |
4782 | goto failure; | |
4783 | if (qfloat == 0) | |
4784 | { | |
4785 | set_fatal_syntax_error (_("invalid floating-point constant")); | |
4786 | goto failure; | |
4787 | } | |
4788 | inst.base.operands[i].imm.value = encode_imm_float_bits (qfloat); | |
4789 | inst.base.operands[i].imm.is_fp = 1; | |
4790 | } | |
4791 | break; | |
4792 | ||
4793 | case AARCH64_OPND_LIMM: | |
4794 | po_misc_or_fail (parse_shifter_operand (&str, info, | |
4795 | SHIFTED_LOGIC_IMM)); | |
4796 | if (info->shifter.operator_present) | |
4797 | { | |
4798 | set_fatal_syntax_error | |
4799 | (_("shift not allowed for bitmask immediate")); | |
4800 | goto failure; | |
4801 | } | |
4802 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4803 | /* addr_off_p */ 0, | |
4804 | /* need_libopcodes_p */ 1, | |
4805 | /* skip_p */ 1); | |
4806 | break; | |
4807 | ||
4808 | case AARCH64_OPND_AIMM: | |
4809 | if (opcode->op == OP_ADD) | |
4810 | /* ADD may have relocation types. */ | |
4811 | po_misc_or_fail (parse_shifter_operand_reloc (&str, info, | |
4812 | SHIFTED_ARITH_IMM)); | |
4813 | else | |
4814 | po_misc_or_fail (parse_shifter_operand (&str, info, | |
4815 | SHIFTED_ARITH_IMM)); | |
4816 | switch (inst.reloc.type) | |
4817 | { | |
4818 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4819 | info->shifter.amount = 12; | |
4820 | break; | |
4821 | case BFD_RELOC_UNUSED: | |
4822 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 0); | |
4823 | if (info->shifter.kind != AARCH64_MOD_NONE) | |
4824 | inst.reloc.flags = FIXUP_F_HAS_EXPLICIT_SHIFT; | |
4825 | inst.reloc.pc_rel = 0; | |
4826 | break; | |
4827 | default: | |
4828 | break; | |
4829 | } | |
4830 | info->imm.value = 0; | |
4831 | if (!info->shifter.operator_present) | |
4832 | { | |
4833 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4834 | kind to be explicit. */ | |
4835 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4836 | info->shifter.kind = AARCH64_MOD_LSL; | |
4837 | } | |
4838 | break; | |
4839 | ||
4840 | case AARCH64_OPND_HALF: | |
4841 | { | |
4842 | /* #<imm16> or relocation. */ | |
4843 | int internal_fixup_p; | |
4844 | po_misc_or_fail (parse_half (&str, &internal_fixup_p)); | |
4845 | if (internal_fixup_p) | |
4846 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 0); | |
4847 | skip_whitespace (str); | |
4848 | if (skip_past_comma (&str)) | |
4849 | { | |
4850 | /* {, LSL #<shift>} */ | |
4851 | if (! aarch64_gas_internal_fixup_p ()) | |
4852 | { | |
4853 | set_fatal_syntax_error (_("can't mix relocation modifier " | |
4854 | "with explicit shift")); | |
4855 | goto failure; | |
4856 | } | |
4857 | po_misc_or_fail (parse_shift (&str, info, SHIFTED_LSL)); | |
4858 | } | |
4859 | else | |
4860 | inst.base.operands[i].shifter.amount = 0; | |
4861 | inst.base.operands[i].shifter.kind = AARCH64_MOD_LSL; | |
4862 | inst.base.operands[i].imm.value = 0; | |
4863 | if (! process_movw_reloc_info ()) | |
4864 | goto failure; | |
4865 | } | |
4866 | break; | |
4867 | ||
4868 | case AARCH64_OPND_EXCEPTION: | |
4869 | po_misc_or_fail (parse_immediate_expression (&str, &inst.reloc.exp)); | |
4870 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4871 | /* addr_off_p */ 0, | |
4872 | /* need_libopcodes_p */ 0, | |
4873 | /* skip_p */ 1); | |
4874 | break; | |
4875 | ||
4876 | case AARCH64_OPND_NZCV: | |
4877 | { | |
4878 | const asm_nzcv *nzcv = hash_find_n (aarch64_nzcv_hsh, str, 4); | |
4879 | if (nzcv != NULL) | |
4880 | { | |
4881 | str += 4; | |
4882 | info->imm.value = nzcv->value; | |
4883 | break; | |
4884 | } | |
4885 | po_imm_or_fail (0, 15); | |
4886 | info->imm.value = val; | |
4887 | } | |
4888 | break; | |
4889 | ||
4890 | case AARCH64_OPND_COND: | |
4891 | info->cond = hash_find_n (aarch64_cond_hsh, str, 2); | |
4892 | str += 2; | |
4893 | if (info->cond == NULL) | |
4894 | { | |
4895 | set_syntax_error (_("invalid condition")); | |
4896 | goto failure; | |
4897 | } | |
4898 | break; | |
4899 | ||
4900 | case AARCH64_OPND_ADDR_ADRP: | |
4901 | po_misc_or_fail (parse_adrp (&str)); | |
4902 | /* Clear the value as operand needs to be relocated. */ | |
4903 | info->imm.value = 0; | |
4904 | break; | |
4905 | ||
4906 | case AARCH64_OPND_ADDR_PCREL14: | |
4907 | case AARCH64_OPND_ADDR_PCREL19: | |
4908 | case AARCH64_OPND_ADDR_PCREL21: | |
4909 | case AARCH64_OPND_ADDR_PCREL26: | |
4910 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
4911 | if (!info->addr.pcrel) | |
4912 | { | |
4913 | set_syntax_error (_("invalid pc-relative address")); | |
4914 | goto failure; | |
4915 | } | |
4916 | if (inst.gen_lit_pool | |
4917 | && (opcode->iclass != loadlit || opcode->op == OP_PRFM_LIT)) | |
4918 | { | |
4919 | /* Only permit "=value" in the literal load instructions. | |
4920 | The literal will be generated by programmer_friendly_fixup. */ | |
4921 | set_syntax_error (_("invalid use of \"=immediate\"")); | |
4922 | goto failure; | |
4923 | } | |
4924 | if (inst.reloc.exp.X_op == O_symbol && find_reloc_table_entry (&str)) | |
4925 | { | |
4926 | set_syntax_error (_("unrecognized relocation suffix")); | |
4927 | goto failure; | |
4928 | } | |
4929 | if (inst.reloc.exp.X_op == O_constant && !inst.gen_lit_pool) | |
4930 | { | |
4931 | info->imm.value = inst.reloc.exp.X_add_number; | |
4932 | inst.reloc.type = BFD_RELOC_UNUSED; | |
4933 | } | |
4934 | else | |
4935 | { | |
4936 | info->imm.value = 0; | |
f41aef5f RE |
4937 | if (inst.reloc.type == BFD_RELOC_UNUSED) |
4938 | switch (opcode->iclass) | |
4939 | { | |
4940 | case compbranch: | |
4941 | case condbranch: | |
4942 | /* e.g. CBZ or B.COND */ | |
4943 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL19); | |
4944 | inst.reloc.type = BFD_RELOC_AARCH64_BRANCH19; | |
4945 | break; | |
4946 | case testbranch: | |
4947 | /* e.g. TBZ */ | |
4948 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL14); | |
4949 | inst.reloc.type = BFD_RELOC_AARCH64_TSTBR14; | |
4950 | break; | |
4951 | case branch_imm: | |
4952 | /* e.g. B or BL */ | |
4953 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL26); | |
4954 | inst.reloc.type = | |
4955 | (opcode->op == OP_BL) ? BFD_RELOC_AARCH64_CALL26 | |
4956 | : BFD_RELOC_AARCH64_JUMP26; | |
4957 | break; | |
4958 | case loadlit: | |
4959 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL19); | |
4960 | inst.reloc.type = BFD_RELOC_AARCH64_LD_LO19_PCREL; | |
4961 | break; | |
4962 | case pcreladdr: | |
4963 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL21); | |
4964 | inst.reloc.type = BFD_RELOC_AARCH64_ADR_LO21_PCREL; | |
4965 | break; | |
4966 | default: | |
4967 | gas_assert (0); | |
4968 | abort (); | |
4969 | } | |
a06ea964 NC |
4970 | inst.reloc.pc_rel = 1; |
4971 | } | |
4972 | break; | |
4973 | ||
4974 | case AARCH64_OPND_ADDR_SIMPLE: | |
4975 | case AARCH64_OPND_SIMD_ADDR_SIMPLE: | |
4976 | /* [<Xn|SP>{, #<simm>}] */ | |
4977 | po_char_or_fail ('['); | |
4978 | po_reg_or_fail (REG_TYPE_R64_SP); | |
4979 | /* Accept optional ", #0". */ | |
4980 | if (operands[i] == AARCH64_OPND_ADDR_SIMPLE | |
4981 | && skip_past_char (&str, ',')) | |
4982 | { | |
4983 | skip_past_char (&str, '#'); | |
4984 | if (! skip_past_char (&str, '0')) | |
4985 | { | |
4986 | set_fatal_syntax_error | |
4987 | (_("the optional immediate offset can only be 0")); | |
4988 | goto failure; | |
4989 | } | |
4990 | } | |
4991 | po_char_or_fail (']'); | |
4992 | info->addr.base_regno = val; | |
4993 | break; | |
4994 | ||
4995 | case AARCH64_OPND_ADDR_REGOFF: | |
4996 | /* [<Xn|SP>, <R><m>{, <extend> {<amount>}}] */ | |
4997 | po_misc_or_fail (parse_address (&str, info, 0)); | |
4998 | if (info->addr.pcrel || !info->addr.offset.is_reg | |
4999 | || !info->addr.preind || info->addr.postind | |
5000 | || info->addr.writeback) | |
5001 | { | |
5002 | set_syntax_error (_("invalid addressing mode")); | |
5003 | goto failure; | |
5004 | } | |
5005 | if (!info->shifter.operator_present) | |
5006 | { | |
5007 | /* Default to LSL if not present. Libopcodes prefers shifter | |
5008 | kind to be explicit. */ | |
5009 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
5010 | info->shifter.kind = AARCH64_MOD_LSL; | |
5011 | } | |
5012 | /* Qualifier to be deduced by libopcodes. */ | |
5013 | break; | |
5014 | ||
5015 | case AARCH64_OPND_ADDR_SIMM7: | |
5016 | po_misc_or_fail (parse_address (&str, info, 0)); | |
5017 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5018 | || (!info->addr.preind && !info->addr.postind)) | |
5019 | { | |
5020 | set_syntax_error (_("invalid addressing mode")); | |
5021 | goto failure; | |
5022 | } | |
5023 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
5024 | /* addr_off_p */ 1, | |
5025 | /* need_libopcodes_p */ 1, | |
5026 | /* skip_p */ 0); | |
5027 | break; | |
5028 | ||
5029 | case AARCH64_OPND_ADDR_SIMM9: | |
5030 | case AARCH64_OPND_ADDR_SIMM9_2: | |
5031 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
5032 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5033 | || (!info->addr.preind && !info->addr.postind) | |
5034 | || (operands[i] == AARCH64_OPND_ADDR_SIMM9_2 | |
5035 | && info->addr.writeback)) | |
5036 | { | |
5037 | set_syntax_error (_("invalid addressing mode")); | |
5038 | goto failure; | |
5039 | } | |
5040 | if (inst.reloc.type != BFD_RELOC_UNUSED) | |
5041 | { | |
5042 | set_syntax_error (_("relocation not allowed")); | |
5043 | goto failure; | |
5044 | } | |
5045 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
5046 | /* addr_off_p */ 1, | |
5047 | /* need_libopcodes_p */ 1, | |
5048 | /* skip_p */ 0); | |
5049 | break; | |
5050 | ||
5051 | case AARCH64_OPND_ADDR_UIMM12: | |
5052 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
5053 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5054 | || !info->addr.preind || info->addr.writeback) | |
5055 | { | |
5056 | set_syntax_error (_("invalid addressing mode")); | |
5057 | goto failure; | |
5058 | } | |
5059 | if (inst.reloc.type == BFD_RELOC_UNUSED) | |
5060 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 1); | |
5061 | else if (inst.reloc.type == BFD_RELOC_AARCH64_LDST_LO12) | |
5062 | inst.reloc.type = ldst_lo12_determine_real_reloc_type (); | |
5063 | /* Leave qualifier to be determined by libopcodes. */ | |
5064 | break; | |
5065 | ||
5066 | case AARCH64_OPND_SIMD_ADDR_POST: | |
5067 | /* [<Xn|SP>], <Xm|#<amount>> */ | |
5068 | po_misc_or_fail (parse_address (&str, info, 1)); | |
5069 | if (!info->addr.postind || !info->addr.writeback) | |
5070 | { | |
5071 | set_syntax_error (_("invalid addressing mode")); | |
5072 | goto failure; | |
5073 | } | |
5074 | if (!info->addr.offset.is_reg) | |
5075 | { | |
5076 | if (inst.reloc.exp.X_op == O_constant) | |
5077 | info->addr.offset.imm = inst.reloc.exp.X_add_number; | |
5078 | else | |
5079 | { | |
5080 | set_fatal_syntax_error | |
5081 | (_("writeback value should be an immediate constant")); | |
5082 | goto failure; | |
5083 | } | |
5084 | } | |
5085 | /* No qualifier. */ | |
5086 | break; | |
5087 | ||
5088 | case AARCH64_OPND_SYSREG: | |
5089 | if ((val = parse_sys_reg (&str, aarch64_sys_regs_hsh, 1)) == FALSE) | |
5090 | { | |
5091 | set_syntax_error (_("unknown or missing system register name")); | |
5092 | goto failure; | |
5093 | } | |
5094 | inst.base.operands[i].sysreg = val; | |
5095 | break; | |
5096 | ||
5097 | case AARCH64_OPND_PSTATEFIELD: | |
5098 | if ((val = parse_sys_reg (&str, aarch64_pstatefield_hsh, 0)) == FALSE) | |
5099 | { | |
5100 | set_syntax_error (_("unknown or missing PSTATE field name")); | |
5101 | goto failure; | |
5102 | } | |
5103 | inst.base.operands[i].pstatefield = val; | |
5104 | break; | |
5105 | ||
5106 | case AARCH64_OPND_SYSREG_IC: | |
5107 | inst.base.operands[i].sysins_op = | |
5108 | parse_sys_ins_reg (&str, aarch64_sys_regs_ic_hsh); | |
5109 | goto sys_reg_ins; | |
5110 | case AARCH64_OPND_SYSREG_DC: | |
5111 | inst.base.operands[i].sysins_op = | |
5112 | parse_sys_ins_reg (&str, aarch64_sys_regs_dc_hsh); | |
5113 | goto sys_reg_ins; | |
5114 | case AARCH64_OPND_SYSREG_AT: | |
5115 | inst.base.operands[i].sysins_op = | |
5116 | parse_sys_ins_reg (&str, aarch64_sys_regs_at_hsh); | |
5117 | goto sys_reg_ins; | |
5118 | case AARCH64_OPND_SYSREG_TLBI: | |
5119 | inst.base.operands[i].sysins_op = | |
5120 | parse_sys_ins_reg (&str, aarch64_sys_regs_tlbi_hsh); | |
5121 | sys_reg_ins: | |
5122 | if (inst.base.operands[i].sysins_op == NULL) | |
5123 | { | |
5124 | set_fatal_syntax_error ( _("unknown or missing operation name")); | |
5125 | goto failure; | |
5126 | } | |
5127 | break; | |
5128 | ||
5129 | case AARCH64_OPND_BARRIER: | |
5130 | case AARCH64_OPND_BARRIER_ISB: | |
5131 | val = parse_barrier (&str); | |
5132 | if (val != PARSE_FAIL | |
5133 | && operands[i] == AARCH64_OPND_BARRIER_ISB && val != 0xf) | |
5134 | { | |
5135 | /* ISB only accepts options name 'sy'. */ | |
5136 | set_syntax_error | |
5137 | (_("the specified option is not accepted in ISB")); | |
5138 | /* Turn off backtrack as this optional operand is present. */ | |
5139 | backtrack_pos = 0; | |
5140 | goto failure; | |
5141 | } | |
5142 | /* This is an extension to accept a 0..15 immediate. */ | |
5143 | if (val == PARSE_FAIL) | |
5144 | po_imm_or_fail (0, 15); | |
5145 | info->barrier = aarch64_barrier_options + val; | |
5146 | break; | |
5147 | ||
5148 | case AARCH64_OPND_PRFOP: | |
5149 | val = parse_pldop (&str); | |
5150 | /* This is an extension to accept a 0..31 immediate. */ | |
5151 | if (val == PARSE_FAIL) | |
5152 | po_imm_or_fail (0, 31); | |
5153 | inst.base.operands[i].prfop = aarch64_prfops + val; | |
5154 | break; | |
5155 | ||
5156 | default: | |
5157 | as_fatal (_("unhandled operand code %d"), operands[i]); | |
5158 | } | |
5159 | ||
5160 | /* If we get here, this operand was successfully parsed. */ | |
5161 | inst.base.operands[i].present = 1; | |
5162 | continue; | |
5163 | ||
5164 | failure: | |
5165 | /* The parse routine should already have set the error, but in case | |
5166 | not, set a default one here. */ | |
5167 | if (! error_p ()) | |
5168 | set_default_error (); | |
5169 | ||
5170 | if (! backtrack_pos) | |
5171 | goto parse_operands_return; | |
5172 | ||
5173 | /* Reaching here means we are dealing with an optional operand that is | |
5174 | omitted from the assembly line. */ | |
5175 | gas_assert (optional_operand_p (opcode, i)); | |
5176 | info->present = 0; | |
5177 | process_omitted_operand (operands[i], opcode, i, info); | |
5178 | ||
5179 | /* Try again, skipping the optional operand at backtrack_pos. */ | |
5180 | str = backtrack_pos; | |
5181 | backtrack_pos = 0; | |
5182 | ||
5183 | /* If this is the last operand that is optional and omitted, but without | |
5184 | the presence of a comma. */ | |
5185 | if (i && comma_skipped_p && i == aarch64_num_of_operands (opcode) - 1) | |
5186 | { | |
5187 | set_fatal_syntax_error | |
5188 | (_("unexpected comma before the omitted optional operand")); | |
5189 | goto parse_operands_return; | |
5190 | } | |
5191 | ||
5192 | /* Clear any error record after the omitted optional operand has been | |
5193 | successfully handled. */ | |
5194 | clear_error (); | |
5195 | } | |
5196 | ||
5197 | /* Check if we have parsed all the operands. */ | |
5198 | if (*str != '\0' && ! error_p ()) | |
5199 | { | |
5200 | /* Set I to the index of the last present operand; this is | |
5201 | for the purpose of diagnostics. */ | |
5202 | for (i -= 1; i >= 0 && !inst.base.operands[i].present; --i) | |
5203 | ; | |
5204 | set_fatal_syntax_error | |
5205 | (_("unexpected characters following instruction")); | |
5206 | } | |
5207 | ||
5208 | parse_operands_return: | |
5209 | ||
5210 | if (error_p ()) | |
5211 | { | |
5212 | DEBUG_TRACE ("parsing FAIL: %s - %s", | |
5213 | operand_mismatch_kind_names[get_error_kind ()], | |
5214 | get_error_message ()); | |
5215 | /* Record the operand error properly; this is useful when there | |
5216 | are multiple instruction templates for a mnemonic name, so that | |
5217 | later on, we can select the error that most closely describes | |
5218 | the problem. */ | |
5219 | record_operand_error (opcode, i, get_error_kind (), | |
5220 | get_error_message ()); | |
5221 | return FALSE; | |
5222 | } | |
5223 | else | |
5224 | { | |
5225 | DEBUG_TRACE ("parsing SUCCESS"); | |
5226 | return TRUE; | |
5227 | } | |
5228 | } | |
5229 | ||
5230 | /* It does some fix-up to provide some programmer friendly feature while | |
5231 | keeping the libopcodes happy, i.e. libopcodes only accepts | |
5232 | the preferred architectural syntax. | |
5233 | Return FALSE if there is any failure; otherwise return TRUE. */ | |
5234 | ||
5235 | static bfd_boolean | |
5236 | programmer_friendly_fixup (aarch64_instruction *instr) | |
5237 | { | |
5238 | aarch64_inst *base = &instr->base; | |
5239 | const aarch64_opcode *opcode = base->opcode; | |
5240 | enum aarch64_op op = opcode->op; | |
5241 | aarch64_opnd_info *operands = base->operands; | |
5242 | ||
5243 | DEBUG_TRACE ("enter"); | |
5244 | ||
5245 | switch (opcode->iclass) | |
5246 | { | |
5247 | case testbranch: | |
5248 | /* TBNZ Xn|Wn, #uimm6, label | |
5249 | Test and Branch Not Zero: conditionally jumps to label if bit number | |
5250 | uimm6 in register Xn is not zero. The bit number implies the width of | |
5251 | the register, which may be written and should be disassembled as Wn if | |
5252 | uimm is less than 32. */ | |
5253 | if (operands[0].qualifier == AARCH64_OPND_QLF_W) | |
5254 | { | |
5255 | if (operands[1].imm.value >= 32) | |
5256 | { | |
5257 | record_operand_out_of_range_error (opcode, 1, _("immediate value"), | |
5258 | 0, 31); | |
5259 | return FALSE; | |
5260 | } | |
5261 | operands[0].qualifier = AARCH64_OPND_QLF_X; | |
5262 | } | |
5263 | break; | |
5264 | case loadlit: | |
5265 | /* LDR Wt, label | =value | |
5266 | As a convenience assemblers will typically permit the notation | |
5267 | "=value" in conjunction with the pc-relative literal load instructions | |
5268 | to automatically place an immediate value or symbolic address in a | |
5269 | nearby literal pool and generate a hidden label which references it. | |
5270 | ISREG has been set to 0 in the case of =value. */ | |
5271 | if (instr->gen_lit_pool | |
5272 | && (op == OP_LDR_LIT || op == OP_LDRV_LIT || op == OP_LDRSW_LIT)) | |
5273 | { | |
5274 | int size = aarch64_get_qualifier_esize (operands[0].qualifier); | |
5275 | if (op == OP_LDRSW_LIT) | |
5276 | size = 4; | |
5277 | if (instr->reloc.exp.X_op != O_constant | |
5278 | && instr->reloc.exp.X_op != O_symbol) | |
5279 | { | |
5280 | record_operand_error (opcode, 1, | |
5281 | AARCH64_OPDE_FATAL_SYNTAX_ERROR, | |
5282 | _("constant expression expected")); | |
5283 | return FALSE; | |
5284 | } | |
5285 | if (! add_to_lit_pool (&instr->reloc.exp, size)) | |
5286 | { | |
5287 | record_operand_error (opcode, 1, | |
5288 | AARCH64_OPDE_OTHER_ERROR, | |
5289 | _("literal pool insertion failed")); | |
5290 | return FALSE; | |
5291 | } | |
5292 | } | |
5293 | break; | |
5294 | case asimdimm: | |
5295 | /* Allow MOVI V0.16B, 97, LSL 0, although the preferred architectural | |
5296 | syntax requires that the LSL shifter can only be used when the | |
5297 | destination register has the shape of 4H, 8H, 2S or 4S. */ | |
5298 | if (op == OP_V_MOVI_B && operands[1].shifter.kind == AARCH64_MOD_LSL | |
5299 | && (operands[0].qualifier == AARCH64_OPND_QLF_V_8B | |
5300 | || operands[0].qualifier == AARCH64_OPND_QLF_V_16B)) | |
5301 | { | |
5302 | if (operands[1].shifter.amount != 0) | |
5303 | { | |
5304 | record_operand_error (opcode, 1, | |
5305 | AARCH64_OPDE_OTHER_ERROR, | |
5306 | _("shift amount non-zero")); | |
5307 | return FALSE; | |
5308 | } | |
5309 | operands[1].shifter.kind = AARCH64_MOD_NONE; | |
5310 | operands[1].qualifier = AARCH64_OPND_QLF_NIL; | |
5311 | } | |
5312 | break; | |
5313 | case log_shift: | |
5314 | case bitfield: | |
5315 | /* UXT[BHW] Wd, Wn | |
5316 | Unsigned Extend Byte|Halfword|Word: UXT[BH] is architectural alias | |
5317 | for UBFM Wd,Wn,#0,#7|15, while UXTW is pseudo instruction which is | |
5318 | encoded using ORR Wd, WZR, Wn (MOV Wd,Wn). | |
5319 | A programmer-friendly assembler should accept a destination Xd in | |
5320 | place of Wd, however that is not the preferred form for disassembly. | |
5321 | */ | |
5322 | if ((op == OP_UXTB || op == OP_UXTH || op == OP_UXTW) | |
5323 | && operands[1].qualifier == AARCH64_OPND_QLF_W | |
5324 | && operands[0].qualifier == AARCH64_OPND_QLF_X) | |
5325 | operands[0].qualifier = AARCH64_OPND_QLF_W; | |
5326 | break; | |
5327 | ||
5328 | case addsub_ext: | |
5329 | { | |
5330 | /* In the 64-bit form, the final register operand is written as Wm | |
5331 | for all but the (possibly omitted) UXTX/LSL and SXTX | |
5332 | operators. | |
5333 | As a programmer-friendly assembler, we accept e.g. | |
5334 | ADDS <Xd>, <Xn|SP>, <Xm>{, UXTB {#<amount>}} and change it to | |
5335 | ADDS <Xd>, <Xn|SP>, <Wm>{, UXTB {#<amount>}}. */ | |
5336 | int idx = aarch64_operand_index (opcode->operands, | |
5337 | AARCH64_OPND_Rm_EXT); | |
5338 | gas_assert (idx == 1 || idx == 2); | |
5339 | if (operands[0].qualifier == AARCH64_OPND_QLF_X | |
5340 | && operands[idx].qualifier == AARCH64_OPND_QLF_X | |
5341 | && operands[idx].shifter.kind != AARCH64_MOD_LSL | |
5342 | && operands[idx].shifter.kind != AARCH64_MOD_UXTX | |
5343 | && operands[idx].shifter.kind != AARCH64_MOD_SXTX) | |
5344 | operands[idx].qualifier = AARCH64_OPND_QLF_W; | |
5345 | } | |
5346 | break; | |
5347 | ||
5348 | default: | |
5349 | break; | |
5350 | } | |
5351 | ||
5352 | DEBUG_TRACE ("exit with SUCCESS"); | |
5353 | return TRUE; | |
5354 | } | |
5355 | ||
5356 | /* A wrapper function to interface with libopcodes on encoding and | |
5357 | record the error message if there is any. | |
5358 | ||
5359 | Return TRUE on success; otherwise return FALSE. */ | |
5360 | ||
5361 | static bfd_boolean | |
5362 | do_encode (const aarch64_opcode *opcode, aarch64_inst *instr, | |
5363 | aarch64_insn *code) | |
5364 | { | |
5365 | aarch64_operand_error error_info; | |
5366 | error_info.kind = AARCH64_OPDE_NIL; | |
5367 | if (aarch64_opcode_encode (opcode, instr, code, NULL, &error_info)) | |
5368 | return TRUE; | |
5369 | else | |
5370 | { | |
5371 | gas_assert (error_info.kind != AARCH64_OPDE_NIL); | |
5372 | record_operand_error_info (opcode, &error_info); | |
5373 | return FALSE; | |
5374 | } | |
5375 | } | |
5376 | ||
5377 | #ifdef DEBUG_AARCH64 | |
5378 | static inline void | |
5379 | dump_opcode_operands (const aarch64_opcode *opcode) | |
5380 | { | |
5381 | int i = 0; | |
5382 | while (opcode->operands[i] != AARCH64_OPND_NIL) | |
5383 | { | |
5384 | aarch64_verbose ("\t\t opnd%d: %s", i, | |
5385 | aarch64_get_operand_name (opcode->operands[i])[0] != '\0' | |
5386 | ? aarch64_get_operand_name (opcode->operands[i]) | |
5387 | : aarch64_get_operand_desc (opcode->operands[i])); | |
5388 | ++i; | |
5389 | } | |
5390 | } | |
5391 | #endif /* DEBUG_AARCH64 */ | |
5392 | ||
5393 | /* This is the guts of the machine-dependent assembler. STR points to a | |
5394 | machine dependent instruction. This function is supposed to emit | |
5395 | the frags/bytes it assembles to. */ | |
5396 | ||
5397 | void | |
5398 | md_assemble (char *str) | |
5399 | { | |
5400 | char *p = str; | |
5401 | templates *template; | |
5402 | aarch64_opcode *opcode; | |
5403 | aarch64_inst *inst_base; | |
5404 | unsigned saved_cond; | |
5405 | ||
5406 | /* Align the previous label if needed. */ | |
5407 | if (last_label_seen != NULL) | |
5408 | { | |
5409 | symbol_set_frag (last_label_seen, frag_now); | |
5410 | S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ()); | |
5411 | S_SET_SEGMENT (last_label_seen, now_seg); | |
5412 | } | |
5413 | ||
5414 | inst.reloc.type = BFD_RELOC_UNUSED; | |
5415 | ||
5416 | DEBUG_TRACE ("\n\n"); | |
5417 | DEBUG_TRACE ("=============================="); | |
5418 | DEBUG_TRACE ("Enter md_assemble with %s", str); | |
5419 | ||
5420 | template = opcode_lookup (&p); | |
5421 | if (!template) | |
5422 | { | |
5423 | /* It wasn't an instruction, but it might be a register alias of | |
5424 | the form alias .req reg directive. */ | |
5425 | if (!create_register_alias (str, p)) | |
5426 | as_bad (_("unknown mnemonic `%s' -- `%s'"), get_mnemonic_name (str), | |
5427 | str); | |
5428 | return; | |
5429 | } | |
5430 | ||
5431 | skip_whitespace (p); | |
5432 | if (*p == ',') | |
5433 | { | |
5434 | as_bad (_("unexpected comma after the mnemonic name `%s' -- `%s'"), | |
5435 | get_mnemonic_name (str), str); | |
5436 | return; | |
5437 | } | |
5438 | ||
5439 | init_operand_error_report (); | |
5440 | ||
5441 | saved_cond = inst.cond; | |
5442 | reset_aarch64_instruction (&inst); | |
5443 | inst.cond = saved_cond; | |
5444 | ||
5445 | /* Iterate through all opcode entries with the same mnemonic name. */ | |
5446 | do | |
5447 | { | |
5448 | opcode = template->opcode; | |
5449 | ||
5450 | DEBUG_TRACE ("opcode %s found", opcode->name); | |
5451 | #ifdef DEBUG_AARCH64 | |
5452 | if (debug_dump) | |
5453 | dump_opcode_operands (opcode); | |
5454 | #endif /* DEBUG_AARCH64 */ | |
5455 | ||
5456 | /* Check that this instruction is supported for this CPU. */ | |
5457 | if (!opcode->avariant | |
5458 | || !AARCH64_CPU_HAS_FEATURE (cpu_variant, *opcode->avariant)) | |
5459 | { | |
5460 | as_bad (_("selected processor does not support `%s'"), str); | |
5461 | return; | |
5462 | } | |
5463 | ||
5464 | mapping_state (MAP_INSN); | |
5465 | ||
5466 | inst_base = &inst.base; | |
5467 | inst_base->opcode = opcode; | |
5468 | ||
5469 | /* Truly conditionally executed instructions, e.g. b.cond. */ | |
5470 | if (opcode->flags & F_COND) | |
5471 | { | |
5472 | gas_assert (inst.cond != COND_ALWAYS); | |
5473 | inst_base->cond = get_cond_from_value (inst.cond); | |
5474 | DEBUG_TRACE ("condition found %s", inst_base->cond->names[0]); | |
5475 | } | |
5476 | else if (inst.cond != COND_ALWAYS) | |
5477 | { | |
5478 | /* It shouldn't arrive here, where the assembly looks like a | |
5479 | conditional instruction but the found opcode is unconditional. */ | |
5480 | gas_assert (0); | |
5481 | continue; | |
5482 | } | |
5483 | ||
5484 | if (parse_operands (p, opcode) | |
5485 | && programmer_friendly_fixup (&inst) | |
5486 | && do_encode (inst_base->opcode, &inst.base, &inst_base->value)) | |
5487 | { | |
5488 | if (inst.reloc.type == BFD_RELOC_UNUSED | |
5489 | || !inst.reloc.need_libopcodes_p) | |
5490 | output_inst (NULL); | |
5491 | else | |
5492 | { | |
5493 | /* If there is relocation generated for the instruction, | |
5494 | store the instruction information for the future fix-up. */ | |
5495 | struct aarch64_inst *copy; | |
5496 | gas_assert (inst.reloc.type != BFD_RELOC_UNUSED); | |
5497 | if ((copy = xmalloc (sizeof (struct aarch64_inst))) == NULL) | |
5498 | abort (); | |
5499 | memcpy (copy, &inst.base, sizeof (struct aarch64_inst)); | |
5500 | output_inst (copy); | |
5501 | } | |
5502 | return; | |
5503 | } | |
5504 | ||
5505 | template = template->next; | |
5506 | if (template != NULL) | |
5507 | { | |
5508 | reset_aarch64_instruction (&inst); | |
5509 | inst.cond = saved_cond; | |
5510 | } | |
5511 | } | |
5512 | while (template != NULL); | |
5513 | ||
5514 | /* Issue the error messages if any. */ | |
5515 | output_operand_error_report (str); | |
5516 | } | |
5517 | ||
5518 | /* Various frobbings of labels and their addresses. */ | |
5519 | ||
5520 | void | |
5521 | aarch64_start_line_hook (void) | |
5522 | { | |
5523 | last_label_seen = NULL; | |
5524 | } | |
5525 | ||
5526 | void | |
5527 | aarch64_frob_label (symbolS * sym) | |
5528 | { | |
5529 | last_label_seen = sym; | |
5530 | ||
5531 | dwarf2_emit_label (sym); | |
5532 | } | |
5533 | ||
5534 | int | |
5535 | aarch64_data_in_code (void) | |
5536 | { | |
5537 | if (!strncmp (input_line_pointer + 1, "data:", 5)) | |
5538 | { | |
5539 | *input_line_pointer = '/'; | |
5540 | input_line_pointer += 5; | |
5541 | *input_line_pointer = 0; | |
5542 | return 1; | |
5543 | } | |
5544 | ||
5545 | return 0; | |
5546 | } | |
5547 | ||
5548 | char * | |
5549 | aarch64_canonicalize_symbol_name (char *name) | |
5550 | { | |
5551 | int len; | |
5552 | ||
5553 | if ((len = strlen (name)) > 5 && streq (name + len - 5, "/data")) | |
5554 | *(name + len - 5) = 0; | |
5555 | ||
5556 | return name; | |
5557 | } | |
5558 | \f | |
5559 | /* Table of all register names defined by default. The user can | |
5560 | define additional names with .req. Note that all register names | |
5561 | should appear in both upper and lowercase variants. Some registers | |
5562 | also have mixed-case names. */ | |
5563 | ||
5564 | #define REGDEF(s,n,t) { #s, n, REG_TYPE_##t, TRUE } | |
5565 | #define REGNUM(p,n,t) REGDEF(p##n, n, t) | |
5566 | #define REGSET31(p,t) \ | |
5567 | REGNUM(p, 0,t), REGNUM(p, 1,t), REGNUM(p, 2,t), REGNUM(p, 3,t), \ | |
5568 | REGNUM(p, 4,t), REGNUM(p, 5,t), REGNUM(p, 6,t), REGNUM(p, 7,t), \ | |
5569 | REGNUM(p, 8,t), REGNUM(p, 9,t), REGNUM(p,10,t), REGNUM(p,11,t), \ | |
5570 | REGNUM(p,12,t), REGNUM(p,13,t), REGNUM(p,14,t), REGNUM(p,15,t), \ | |
5571 | REGNUM(p,16,t), REGNUM(p,17,t), REGNUM(p,18,t), REGNUM(p,19,t), \ | |
5572 | REGNUM(p,20,t), REGNUM(p,21,t), REGNUM(p,22,t), REGNUM(p,23,t), \ | |
5573 | REGNUM(p,24,t), REGNUM(p,25,t), REGNUM(p,26,t), REGNUM(p,27,t), \ | |
5574 | REGNUM(p,28,t), REGNUM(p,29,t), REGNUM(p,30,t) | |
5575 | #define REGSET(p,t) \ | |
5576 | REGSET31(p,t), REGNUM(p,31,t) | |
5577 | ||
5578 | /* These go into aarch64_reg_hsh hash-table. */ | |
5579 | static const reg_entry reg_names[] = { | |
5580 | /* Integer registers. */ | |
5581 | REGSET31 (x, R_64), REGSET31 (X, R_64), | |
5582 | REGSET31 (w, R_32), REGSET31 (W, R_32), | |
5583 | ||
5584 | REGDEF (wsp, 31, SP_32), REGDEF (WSP, 31, SP_32), | |
5585 | REGDEF (sp, 31, SP_64), REGDEF (SP, 31, SP_64), | |
5586 | ||
5587 | REGDEF (wzr, 31, Z_32), REGDEF (WZR, 31, Z_32), | |
5588 | REGDEF (xzr, 31, Z_64), REGDEF (XZR, 31, Z_64), | |
5589 | ||
5590 | /* Coprocessor register numbers. */ | |
5591 | REGSET (c, CN), REGSET (C, CN), | |
5592 | ||
5593 | /* Floating-point single precision registers. */ | |
5594 | REGSET (s, FP_S), REGSET (S, FP_S), | |
5595 | ||
5596 | /* Floating-point double precision registers. */ | |
5597 | REGSET (d, FP_D), REGSET (D, FP_D), | |
5598 | ||
5599 | /* Floating-point half precision registers. */ | |
5600 | REGSET (h, FP_H), REGSET (H, FP_H), | |
5601 | ||
5602 | /* Floating-point byte precision registers. */ | |
5603 | REGSET (b, FP_B), REGSET (B, FP_B), | |
5604 | ||
5605 | /* Floating-point quad precision registers. */ | |
5606 | REGSET (q, FP_Q), REGSET (Q, FP_Q), | |
5607 | ||
5608 | /* FP/SIMD registers. */ | |
5609 | REGSET (v, VN), REGSET (V, VN), | |
5610 | }; | |
5611 | ||
5612 | #undef REGDEF | |
5613 | #undef REGNUM | |
5614 | #undef REGSET | |
5615 | ||
5616 | #define N 1 | |
5617 | #define n 0 | |
5618 | #define Z 1 | |
5619 | #define z 0 | |
5620 | #define C 1 | |
5621 | #define c 0 | |
5622 | #define V 1 | |
5623 | #define v 0 | |
5624 | #define B(a,b,c,d) (((a) << 3) | ((b) << 2) | ((c) << 1) | (d)) | |
5625 | static const asm_nzcv nzcv_names[] = { | |
5626 | {"nzcv", B (n, z, c, v)}, | |
5627 | {"nzcV", B (n, z, c, V)}, | |
5628 | {"nzCv", B (n, z, C, v)}, | |
5629 | {"nzCV", B (n, z, C, V)}, | |
5630 | {"nZcv", B (n, Z, c, v)}, | |
5631 | {"nZcV", B (n, Z, c, V)}, | |
5632 | {"nZCv", B (n, Z, C, v)}, | |
5633 | {"nZCV", B (n, Z, C, V)}, | |
5634 | {"Nzcv", B (N, z, c, v)}, | |
5635 | {"NzcV", B (N, z, c, V)}, | |
5636 | {"NzCv", B (N, z, C, v)}, | |
5637 | {"NzCV", B (N, z, C, V)}, | |
5638 | {"NZcv", B (N, Z, c, v)}, | |
5639 | {"NZcV", B (N, Z, c, V)}, | |
5640 | {"NZCv", B (N, Z, C, v)}, | |
5641 | {"NZCV", B (N, Z, C, V)} | |
5642 | }; | |
5643 | ||
5644 | #undef N | |
5645 | #undef n | |
5646 | #undef Z | |
5647 | #undef z | |
5648 | #undef C | |
5649 | #undef c | |
5650 | #undef V | |
5651 | #undef v | |
5652 | #undef B | |
5653 | \f | |
5654 | /* MD interface: bits in the object file. */ | |
5655 | ||
5656 | /* Turn an integer of n bytes (in val) into a stream of bytes appropriate | |
5657 | for use in the a.out file, and stores them in the array pointed to by buf. | |
5658 | This knows about the endian-ness of the target machine and does | |
5659 | THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) | |
5660 | 2 (short) and 4 (long) Floating numbers are put out as a series of | |
5661 | LITTLENUMS (shorts, here at least). */ | |
5662 | ||
5663 | void | |
5664 | md_number_to_chars (char *buf, valueT val, int n) | |
5665 | { | |
5666 | if (target_big_endian) | |
5667 | number_to_chars_bigendian (buf, val, n); | |
5668 | else | |
5669 | number_to_chars_littleendian (buf, val, n); | |
5670 | } | |
5671 | ||
5672 | /* MD interface: Sections. */ | |
5673 | ||
5674 | /* Estimate the size of a frag before relaxing. Assume everything fits in | |
5675 | 4 bytes. */ | |
5676 | ||
5677 | int | |
5678 | md_estimate_size_before_relax (fragS * fragp, segT segtype ATTRIBUTE_UNUSED) | |
5679 | { | |
5680 | fragp->fr_var = 4; | |
5681 | return 4; | |
5682 | } | |
5683 | ||
5684 | /* Round up a section size to the appropriate boundary. */ | |
5685 | ||
5686 | valueT | |
5687 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) | |
5688 | { | |
5689 | return size; | |
5690 | } | |
5691 | ||
5692 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents | |
5693 | of an rs_align_code fragment. */ | |
5694 | ||
5695 | void | |
5696 | aarch64_handle_align (fragS * fragP) | |
5697 | { | |
5698 | /* NOP = d503201f */ | |
5699 | /* AArch64 instructions are always little-endian. */ | |
5700 | static char const aarch64_noop[4] = { 0x1f, 0x20, 0x03, 0xd5 }; | |
5701 | ||
5702 | int bytes, fix, noop_size; | |
5703 | char *p; | |
5704 | const char *noop; | |
5705 | ||
5706 | if (fragP->fr_type != rs_align_code) | |
5707 | return; | |
5708 | ||
5709 | bytes = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix; | |
5710 | p = fragP->fr_literal + fragP->fr_fix; | |
5711 | fix = 0; | |
5712 | ||
5713 | if (bytes > MAX_MEM_FOR_RS_ALIGN_CODE) | |
5714 | bytes &= MAX_MEM_FOR_RS_ALIGN_CODE; | |
5715 | ||
5716 | #ifdef OBJ_ELF | |
5717 | gas_assert (fragP->tc_frag_data.recorded); | |
5718 | #endif | |
5719 | ||
5720 | noop = aarch64_noop; | |
5721 | noop_size = sizeof (aarch64_noop); | |
5722 | fragP->fr_var = noop_size; | |
5723 | ||
5724 | if (bytes & (noop_size - 1)) | |
5725 | { | |
5726 | fix = bytes & (noop_size - 1); | |
5727 | #ifdef OBJ_ELF | |
5728 | insert_data_mapping_symbol (MAP_INSN, fragP->fr_fix, fragP, fix); | |
5729 | #endif | |
5730 | memset (p, 0, fix); | |
5731 | p += fix; | |
5732 | bytes -= fix; | |
5733 | } | |
5734 | ||
5735 | while (bytes >= noop_size) | |
5736 | { | |
5737 | memcpy (p, noop, noop_size); | |
5738 | p += noop_size; | |
5739 | bytes -= noop_size; | |
5740 | fix += noop_size; | |
5741 | } | |
5742 | ||
5743 | fragP->fr_fix += fix; | |
5744 | } | |
5745 | ||
5746 | /* Called from md_do_align. Used to create an alignment | |
5747 | frag in a code section. */ | |
5748 | ||
5749 | void | |
5750 | aarch64_frag_align_code (int n, int max) | |
5751 | { | |
5752 | char *p; | |
5753 | ||
5754 | /* We assume that there will never be a requirement | |
5755 | to support alignments greater than x bytes. */ | |
5756 | if (max > MAX_MEM_FOR_RS_ALIGN_CODE) | |
5757 | as_fatal (_ | |
5758 | ("alignments greater than %d bytes not supported in .text sections"), | |
5759 | MAX_MEM_FOR_RS_ALIGN_CODE + 1); | |
5760 | ||
5761 | p = frag_var (rs_align_code, | |
5762 | MAX_MEM_FOR_RS_ALIGN_CODE, | |
5763 | 1, | |
5764 | (relax_substateT) max, | |
5765 | (symbolS *) NULL, (offsetT) n, (char *) NULL); | |
5766 | *p = 0; | |
5767 | } | |
5768 | ||
5769 | /* Perform target specific initialisation of a frag. | |
5770 | Note - despite the name this initialisation is not done when the frag | |
5771 | is created, but only when its type is assigned. A frag can be created | |
5772 | and used a long time before its type is set, so beware of assuming that | |
5773 | this initialisationis performed first. */ | |
5774 | ||
5775 | #ifndef OBJ_ELF | |
5776 | void | |
5777 | aarch64_init_frag (fragS * fragP ATTRIBUTE_UNUSED, | |
5778 | int max_chars ATTRIBUTE_UNUSED) | |
5779 | { | |
5780 | } | |
5781 | ||
5782 | #else /* OBJ_ELF is defined. */ | |
5783 | void | |
5784 | aarch64_init_frag (fragS * fragP, int max_chars) | |
5785 | { | |
5786 | /* Record a mapping symbol for alignment frags. We will delete this | |
5787 | later if the alignment ends up empty. */ | |
5788 | if (!fragP->tc_frag_data.recorded) | |
5789 | { | |
5790 | fragP->tc_frag_data.recorded = 1; | |
5791 | switch (fragP->fr_type) | |
5792 | { | |
5793 | case rs_align: | |
5794 | case rs_align_test: | |
5795 | case rs_fill: | |
5796 | mapping_state_2 (MAP_DATA, max_chars); | |
5797 | break; | |
5798 | case rs_align_code: | |
5799 | mapping_state_2 (MAP_INSN, max_chars); | |
5800 | break; | |
5801 | default: | |
5802 | break; | |
5803 | } | |
5804 | } | |
5805 | } | |
5806 | \f | |
5807 | /* Initialize the DWARF-2 unwind information for this procedure. */ | |
5808 | ||
5809 | void | |
5810 | tc_aarch64_frame_initial_instructions (void) | |
5811 | { | |
5812 | cfi_add_CFA_def_cfa (REG_SP, 0); | |
5813 | } | |
5814 | #endif /* OBJ_ELF */ | |
5815 | ||
5816 | /* Convert REGNAME to a DWARF-2 register number. */ | |
5817 | ||
5818 | int | |
5819 | tc_aarch64_regname_to_dw2regnum (char *regname) | |
5820 | { | |
5821 | const reg_entry *reg = parse_reg (®name); | |
5822 | if (reg == NULL) | |
5823 | return -1; | |
5824 | ||
5825 | switch (reg->type) | |
5826 | { | |
5827 | case REG_TYPE_SP_32: | |
5828 | case REG_TYPE_SP_64: | |
5829 | case REG_TYPE_R_32: | |
5830 | case REG_TYPE_R_64: | |
5831 | case REG_TYPE_FP_B: | |
5832 | case REG_TYPE_FP_H: | |
5833 | case REG_TYPE_FP_S: | |
5834 | case REG_TYPE_FP_D: | |
5835 | case REG_TYPE_FP_Q: | |
5836 | return reg->number; | |
5837 | default: | |
5838 | break; | |
5839 | } | |
5840 | return -1; | |
5841 | } | |
5842 | ||
5843 | /* MD interface: Symbol and relocation handling. */ | |
5844 | ||
5845 | /* Return the address within the segment that a PC-relative fixup is | |
5846 | relative to. For AArch64 PC-relative fixups applied to instructions | |
5847 | are generally relative to the location plus AARCH64_PCREL_OFFSET bytes. */ | |
5848 | ||
5849 | long | |
5850 | md_pcrel_from_section (fixS * fixP, segT seg) | |
5851 | { | |
5852 | offsetT base = fixP->fx_where + fixP->fx_frag->fr_address; | |
5853 | ||
5854 | /* If this is pc-relative and we are going to emit a relocation | |
5855 | then we just want to put out any pipeline compensation that the linker | |
5856 | will need. Otherwise we want to use the calculated base. */ | |
5857 | if (fixP->fx_pcrel | |
5858 | && ((fixP->fx_addsy && S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
5859 | || aarch64_force_relocation (fixP))) | |
5860 | base = 0; | |
5861 | ||
5862 | /* AArch64 should be consistent for all pc-relative relocations. */ | |
5863 | return base + AARCH64_PCREL_OFFSET; | |
5864 | } | |
5865 | ||
5866 | /* Under ELF we need to default _GLOBAL_OFFSET_TABLE. | |
5867 | Otherwise we have no need to default values of symbols. */ | |
5868 | ||
5869 | symbolS * | |
5870 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
5871 | { | |
5872 | #ifdef OBJ_ELF | |
5873 | if (name[0] == '_' && name[1] == 'G' | |
5874 | && streq (name, GLOBAL_OFFSET_TABLE_NAME)) | |
5875 | { | |
5876 | if (!GOT_symbol) | |
5877 | { | |
5878 | if (symbol_find (name)) | |
5879 | as_bad (_("GOT already in the symbol table")); | |
5880 | ||
5881 | GOT_symbol = symbol_new (name, undefined_section, | |
5882 | (valueT) 0, &zero_address_frag); | |
5883 | } | |
5884 | ||
5885 | return GOT_symbol; | |
5886 | } | |
5887 | #endif | |
5888 | ||
5889 | return 0; | |
5890 | } | |
5891 | ||
5892 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
5893 | range expressible by a unsigned number with the indicated number of | |
5894 | BITS. */ | |
5895 | ||
5896 | static bfd_boolean | |
5897 | unsigned_overflow (valueT value, unsigned bits) | |
5898 | { | |
5899 | valueT lim; | |
5900 | if (bits >= sizeof (valueT) * 8) | |
5901 | return FALSE; | |
5902 | lim = (valueT) 1 << bits; | |
5903 | return (value >= lim); | |
5904 | } | |
5905 | ||
5906 | ||
5907 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
5908 | range expressible by an signed number with the indicated number of | |
5909 | BITS. */ | |
5910 | ||
5911 | static bfd_boolean | |
5912 | signed_overflow (offsetT value, unsigned bits) | |
5913 | { | |
5914 | offsetT lim; | |
5915 | if (bits >= sizeof (offsetT) * 8) | |
5916 | return FALSE; | |
5917 | lim = (offsetT) 1 << (bits - 1); | |
5918 | return (value < -lim || value >= lim); | |
5919 | } | |
5920 | ||
5921 | /* Given an instruction in *INST, which is expected to be a scaled, 12-bit, | |
5922 | unsigned immediate offset load/store instruction, try to encode it as | |
5923 | an unscaled, 9-bit, signed immediate offset load/store instruction. | |
5924 | Return TRUE if it is successful; otherwise return FALSE. | |
5925 | ||
5926 | As a programmer-friendly assembler, LDUR/STUR instructions can be generated | |
5927 | in response to the standard LDR/STR mnemonics when the immediate offset is | |
5928 | unambiguous, i.e. when it is negative or unaligned. */ | |
5929 | ||
5930 | static bfd_boolean | |
5931 | try_to_encode_as_unscaled_ldst (aarch64_inst *instr) | |
5932 | { | |
5933 | int idx; | |
5934 | enum aarch64_op new_op; | |
5935 | const aarch64_opcode *new_opcode; | |
5936 | ||
5937 | gas_assert (instr->opcode->iclass == ldst_pos); | |
5938 | ||
5939 | switch (instr->opcode->op) | |
5940 | { | |
5941 | case OP_LDRB_POS:new_op = OP_LDURB; break; | |
5942 | case OP_STRB_POS: new_op = OP_STURB; break; | |
5943 | case OP_LDRSB_POS: new_op = OP_LDURSB; break; | |
5944 | case OP_LDRH_POS: new_op = OP_LDURH; break; | |
5945 | case OP_STRH_POS: new_op = OP_STURH; break; | |
5946 | case OP_LDRSH_POS: new_op = OP_LDURSH; break; | |
5947 | case OP_LDR_POS: new_op = OP_LDUR; break; | |
5948 | case OP_STR_POS: new_op = OP_STUR; break; | |
5949 | case OP_LDRF_POS: new_op = OP_LDURV; break; | |
5950 | case OP_STRF_POS: new_op = OP_STURV; break; | |
5951 | case OP_LDRSW_POS: new_op = OP_LDURSW; break; | |
5952 | case OP_PRFM_POS: new_op = OP_PRFUM; break; | |
5953 | default: new_op = OP_NIL; break; | |
5954 | } | |
5955 | ||
5956 | if (new_op == OP_NIL) | |
5957 | return FALSE; | |
5958 | ||
5959 | new_opcode = aarch64_get_opcode (new_op); | |
5960 | gas_assert (new_opcode != NULL); | |
5961 | ||
5962 | DEBUG_TRACE ("Check programmer-friendly STURB/LDURB -> STRB/LDRB: %d == %d", | |
5963 | instr->opcode->op, new_opcode->op); | |
5964 | ||
5965 | aarch64_replace_opcode (instr, new_opcode); | |
5966 | ||
5967 | /* Clear up the ADDR_SIMM9's qualifier; otherwise the | |
5968 | qualifier matching may fail because the out-of-date qualifier will | |
5969 | prevent the operand being updated with a new and correct qualifier. */ | |
5970 | idx = aarch64_operand_index (instr->opcode->operands, | |
5971 | AARCH64_OPND_ADDR_SIMM9); | |
5972 | gas_assert (idx == 1); | |
5973 | instr->operands[idx].qualifier = AARCH64_OPND_QLF_NIL; | |
5974 | ||
5975 | DEBUG_TRACE ("Found LDURB entry to encode programmer-friendly LDRB"); | |
5976 | ||
5977 | if (!aarch64_opcode_encode (instr->opcode, instr, &instr->value, NULL, NULL)) | |
5978 | return FALSE; | |
5979 | ||
5980 | return TRUE; | |
5981 | } | |
5982 | ||
5983 | /* Called by fix_insn to fix a MOV immediate alias instruction. | |
5984 | ||
5985 | Operand for a generic move immediate instruction, which is an alias | |
5986 | instruction that generates a single MOVZ, MOVN or ORR instruction to loads | |
5987 | a 32-bit/64-bit immediate value into general register. An assembler error | |
5988 | shall result if the immediate cannot be created by a single one of these | |
5989 | instructions. If there is a choice, then to ensure reversability an | |
5990 | assembler must prefer a MOVZ to MOVN, and MOVZ or MOVN to ORR. */ | |
5991 | ||
5992 | static void | |
5993 | fix_mov_imm_insn (fixS *fixP, char *buf, aarch64_inst *instr, offsetT value) | |
5994 | { | |
5995 | const aarch64_opcode *opcode; | |
5996 | ||
5997 | /* Need to check if the destination is SP/ZR. The check has to be done | |
5998 | before any aarch64_replace_opcode. */ | |
5999 | int try_mov_wide_p = !aarch64_stack_pointer_p (&instr->operands[0]); | |
6000 | int try_mov_bitmask_p = !aarch64_zero_register_p (&instr->operands[0]); | |
6001 | ||
6002 | instr->operands[1].imm.value = value; | |
6003 | instr->operands[1].skip = 0; | |
6004 | ||
6005 | if (try_mov_wide_p) | |
6006 | { | |
6007 | /* Try the MOVZ alias. */ | |
6008 | opcode = aarch64_get_opcode (OP_MOV_IMM_WIDE); | |
6009 | aarch64_replace_opcode (instr, opcode); | |
6010 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6011 | &instr->value, NULL, NULL)) | |
6012 | { | |
6013 | put_aarch64_insn (buf, instr->value); | |
6014 | return; | |
6015 | } | |
6016 | /* Try the MOVK alias. */ | |
6017 | opcode = aarch64_get_opcode (OP_MOV_IMM_WIDEN); | |
6018 | aarch64_replace_opcode (instr, opcode); | |
6019 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6020 | &instr->value, NULL, NULL)) | |
6021 | { | |
6022 | put_aarch64_insn (buf, instr->value); | |
6023 | return; | |
6024 | } | |
6025 | } | |
6026 | ||
6027 | if (try_mov_bitmask_p) | |
6028 | { | |
6029 | /* Try the ORR alias. */ | |
6030 | opcode = aarch64_get_opcode (OP_MOV_IMM_LOG); | |
6031 | aarch64_replace_opcode (instr, opcode); | |
6032 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6033 | &instr->value, NULL, NULL)) | |
6034 | { | |
6035 | put_aarch64_insn (buf, instr->value); | |
6036 | return; | |
6037 | } | |
6038 | } | |
6039 | ||
6040 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6041 | _("immediate cannot be moved by a single instruction")); | |
6042 | } | |
6043 | ||
6044 | /* An instruction operand which is immediate related may have symbol used | |
6045 | in the assembly, e.g. | |
6046 | ||
6047 | mov w0, u32 | |
6048 | .set u32, 0x00ffff00 | |
6049 | ||
6050 | At the time when the assembly instruction is parsed, a referenced symbol, | |
6051 | like 'u32' in the above example may not have been seen; a fixS is created | |
6052 | in such a case and is handled here after symbols have been resolved. | |
6053 | Instruction is fixed up with VALUE using the information in *FIXP plus | |
6054 | extra information in FLAGS. | |
6055 | ||
6056 | This function is called by md_apply_fix to fix up instructions that need | |
6057 | a fix-up described above but does not involve any linker-time relocation. */ | |
6058 | ||
6059 | static void | |
6060 | fix_insn (fixS *fixP, uint32_t flags, offsetT value) | |
6061 | { | |
6062 | int idx; | |
6063 | uint32_t insn; | |
6064 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
6065 | enum aarch64_opnd opnd = fixP->tc_fix_data.opnd; | |
6066 | aarch64_inst *new_inst = fixP->tc_fix_data.inst; | |
6067 | ||
6068 | if (new_inst) | |
6069 | { | |
6070 | /* Now the instruction is about to be fixed-up, so the operand that | |
6071 | was previously marked as 'ignored' needs to be unmarked in order | |
6072 | to get the encoding done properly. */ | |
6073 | idx = aarch64_operand_index (new_inst->opcode->operands, opnd); | |
6074 | new_inst->operands[idx].skip = 0; | |
6075 | } | |
6076 | ||
6077 | gas_assert (opnd != AARCH64_OPND_NIL); | |
6078 | ||
6079 | switch (opnd) | |
6080 | { | |
6081 | case AARCH64_OPND_EXCEPTION: | |
6082 | if (unsigned_overflow (value, 16)) | |
6083 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6084 | _("immediate out of range")); | |
6085 | insn = get_aarch64_insn (buf); | |
6086 | insn |= encode_svc_imm (value); | |
6087 | put_aarch64_insn (buf, insn); | |
6088 | break; | |
6089 | ||
6090 | case AARCH64_OPND_AIMM: | |
6091 | /* ADD or SUB with immediate. | |
6092 | NOTE this assumes we come here with a add/sub shifted reg encoding | |
6093 | 3 322|2222|2 2 2 21111 111111 | |
6094 | 1 098|7654|3 2 1 09876 543210 98765 43210 | |
6095 | 0b000000 sf 000|1011|shift 0 Rm imm6 Rn Rd ADD | |
6096 | 2b000000 sf 010|1011|shift 0 Rm imm6 Rn Rd ADDS | |
6097 | 4b000000 sf 100|1011|shift 0 Rm imm6 Rn Rd SUB | |
6098 | 6b000000 sf 110|1011|shift 0 Rm imm6 Rn Rd SUBS | |
6099 | -> | |
6100 | 3 322|2222|2 2 221111111111 | |
6101 | 1 098|7654|3 2 109876543210 98765 43210 | |
6102 | 11000000 sf 001|0001|shift imm12 Rn Rd ADD | |
6103 | 31000000 sf 011|0001|shift imm12 Rn Rd ADDS | |
6104 | 51000000 sf 101|0001|shift imm12 Rn Rd SUB | |
6105 | 71000000 sf 111|0001|shift imm12 Rn Rd SUBS | |
6106 | Fields sf Rn Rd are already set. */ | |
6107 | insn = get_aarch64_insn (buf); | |
6108 | if (value < 0) | |
6109 | { | |
6110 | /* Add <-> sub. */ | |
6111 | insn = reencode_addsub_switch_add_sub (insn); | |
6112 | value = -value; | |
6113 | } | |
6114 | ||
6115 | if ((flags & FIXUP_F_HAS_EXPLICIT_SHIFT) == 0 | |
6116 | && unsigned_overflow (value, 12)) | |
6117 | { | |
6118 | /* Try to shift the value by 12 to make it fit. */ | |
6119 | if (((value >> 12) << 12) == value | |
6120 | && ! unsigned_overflow (value, 12 + 12)) | |
6121 | { | |
6122 | value >>= 12; | |
6123 | insn |= encode_addsub_imm_shift_amount (1); | |
6124 | } | |
6125 | } | |
6126 | ||
6127 | if (unsigned_overflow (value, 12)) | |
6128 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6129 | _("immediate out of range")); | |
6130 | ||
6131 | insn |= encode_addsub_imm (value); | |
6132 | ||
6133 | put_aarch64_insn (buf, insn); | |
6134 | break; | |
6135 | ||
6136 | case AARCH64_OPND_SIMD_IMM: | |
6137 | case AARCH64_OPND_SIMD_IMM_SFT: | |
6138 | case AARCH64_OPND_LIMM: | |
6139 | /* Bit mask immediate. */ | |
6140 | gas_assert (new_inst != NULL); | |
6141 | idx = aarch64_operand_index (new_inst->opcode->operands, opnd); | |
6142 | new_inst->operands[idx].imm.value = value; | |
6143 | if (aarch64_opcode_encode (new_inst->opcode, new_inst, | |
6144 | &new_inst->value, NULL, NULL)) | |
6145 | put_aarch64_insn (buf, new_inst->value); | |
6146 | else | |
6147 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6148 | _("invalid immediate")); | |
6149 | break; | |
6150 | ||
6151 | case AARCH64_OPND_HALF: | |
6152 | /* 16-bit unsigned immediate. */ | |
6153 | if (unsigned_overflow (value, 16)) | |
6154 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6155 | _("immediate out of range")); | |
6156 | insn = get_aarch64_insn (buf); | |
6157 | insn |= encode_movw_imm (value & 0xffff); | |
6158 | put_aarch64_insn (buf, insn); | |
6159 | break; | |
6160 | ||
6161 | case AARCH64_OPND_IMM_MOV: | |
6162 | /* Operand for a generic move immediate instruction, which is | |
6163 | an alias instruction that generates a single MOVZ, MOVN or ORR | |
6164 | instruction to loads a 32-bit/64-bit immediate value into general | |
6165 | register. An assembler error shall result if the immediate cannot be | |
6166 | created by a single one of these instructions. If there is a choice, | |
6167 | then to ensure reversability an assembler must prefer a MOVZ to MOVN, | |
6168 | and MOVZ or MOVN to ORR. */ | |
6169 | gas_assert (new_inst != NULL); | |
6170 | fix_mov_imm_insn (fixP, buf, new_inst, value); | |
6171 | break; | |
6172 | ||
6173 | case AARCH64_OPND_ADDR_SIMM7: | |
6174 | case AARCH64_OPND_ADDR_SIMM9: | |
6175 | case AARCH64_OPND_ADDR_SIMM9_2: | |
6176 | case AARCH64_OPND_ADDR_UIMM12: | |
6177 | /* Immediate offset in an address. */ | |
6178 | insn = get_aarch64_insn (buf); | |
6179 | ||
6180 | gas_assert (new_inst != NULL && new_inst->value == insn); | |
6181 | gas_assert (new_inst->opcode->operands[1] == opnd | |
6182 | || new_inst->opcode->operands[2] == opnd); | |
6183 | ||
6184 | /* Get the index of the address operand. */ | |
6185 | if (new_inst->opcode->operands[1] == opnd) | |
6186 | /* e.g. STR <Xt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
6187 | idx = 1; | |
6188 | else | |
6189 | /* e.g. LDP <Qt1>, <Qt2>, [<Xn|SP>{, #<imm>}]. */ | |
6190 | idx = 2; | |
6191 | ||
6192 | /* Update the resolved offset value. */ | |
6193 | new_inst->operands[idx].addr.offset.imm = value; | |
6194 | ||
6195 | /* Encode/fix-up. */ | |
6196 | if (aarch64_opcode_encode (new_inst->opcode, new_inst, | |
6197 | &new_inst->value, NULL, NULL)) | |
6198 | { | |
6199 | put_aarch64_insn (buf, new_inst->value); | |
6200 | break; | |
6201 | } | |
6202 | else if (new_inst->opcode->iclass == ldst_pos | |
6203 | && try_to_encode_as_unscaled_ldst (new_inst)) | |
6204 | { | |
6205 | put_aarch64_insn (buf, new_inst->value); | |
6206 | break; | |
6207 | } | |
6208 | ||
6209 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6210 | _("immediate offset out of range")); | |
6211 | break; | |
6212 | ||
6213 | default: | |
6214 | gas_assert (0); | |
6215 | as_fatal (_("unhandled operand code %d"), opnd); | |
6216 | } | |
6217 | } | |
6218 | ||
6219 | /* Apply a fixup (fixP) to segment data, once it has been determined | |
6220 | by our caller that we have all the info we need to fix it up. | |
6221 | ||
6222 | Parameter valP is the pointer to the value of the bits. */ | |
6223 | ||
6224 | void | |
6225 | md_apply_fix (fixS * fixP, valueT * valP, segT seg) | |
6226 | { | |
6227 | offsetT value = *valP; | |
6228 | uint32_t insn; | |
6229 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
6230 | int scale; | |
6231 | unsigned flags = fixP->fx_addnumber; | |
6232 | ||
6233 | DEBUG_TRACE ("\n\n"); | |
6234 | DEBUG_TRACE ("~~~~~~~~~~~~~~~~~~~~~~~~~"); | |
6235 | DEBUG_TRACE ("Enter md_apply_fix"); | |
6236 | ||
6237 | gas_assert (fixP->fx_r_type <= BFD_RELOC_UNUSED); | |
6238 | ||
6239 | /* Note whether this will delete the relocation. */ | |
6240 | ||
6241 | if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) | |
6242 | fixP->fx_done = 1; | |
6243 | ||
6244 | /* Process the relocations. */ | |
6245 | switch (fixP->fx_r_type) | |
6246 | { | |
6247 | case BFD_RELOC_NONE: | |
6248 | /* This will need to go in the object file. */ | |
6249 | fixP->fx_done = 0; | |
6250 | break; | |
6251 | ||
6252 | case BFD_RELOC_8: | |
6253 | case BFD_RELOC_8_PCREL: | |
6254 | if (fixP->fx_done || !seg->use_rela_p) | |
6255 | md_number_to_chars (buf, value, 1); | |
6256 | break; | |
6257 | ||
6258 | case BFD_RELOC_16: | |
6259 | case BFD_RELOC_16_PCREL: | |
6260 | if (fixP->fx_done || !seg->use_rela_p) | |
6261 | md_number_to_chars (buf, value, 2); | |
6262 | break; | |
6263 | ||
6264 | case BFD_RELOC_32: | |
6265 | case BFD_RELOC_32_PCREL: | |
6266 | if (fixP->fx_done || !seg->use_rela_p) | |
6267 | md_number_to_chars (buf, value, 4); | |
6268 | break; | |
6269 | ||
6270 | case BFD_RELOC_64: | |
6271 | case BFD_RELOC_64_PCREL: | |
6272 | if (fixP->fx_done || !seg->use_rela_p) | |
6273 | md_number_to_chars (buf, value, 8); | |
6274 | break; | |
6275 | ||
6276 | case BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP: | |
6277 | /* We claim that these fixups have been processed here, even if | |
6278 | in fact we generate an error because we do not have a reloc | |
6279 | for them, so tc_gen_reloc() will reject them. */ | |
6280 | fixP->fx_done = 1; | |
6281 | if (fixP->fx_addsy && !S_IS_DEFINED (fixP->fx_addsy)) | |
6282 | { | |
6283 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6284 | _("undefined symbol %s used as an immediate value"), | |
6285 | S_GET_NAME (fixP->fx_addsy)); | |
6286 | goto apply_fix_return; | |
6287 | } | |
6288 | fix_insn (fixP, flags, value); | |
6289 | break; | |
6290 | ||
6291 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: | |
6292 | if (value & 3) | |
6293 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6294 | _("pc-relative load offset not word aligned")); | |
6295 | if (signed_overflow (value, 21)) | |
6296 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6297 | _("pc-relative load offset out of range")); | |
6298 | if (fixP->fx_done || !seg->use_rela_p) | |
6299 | { | |
6300 | insn = get_aarch64_insn (buf); | |
6301 | insn |= encode_ld_lit_ofs_19 (value >> 2); | |
6302 | put_aarch64_insn (buf, insn); | |
6303 | } | |
6304 | break; | |
6305 | ||
6306 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
6307 | if (signed_overflow (value, 21)) | |
6308 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6309 | _("pc-relative address offset out of range")); | |
6310 | if (fixP->fx_done || !seg->use_rela_p) | |
6311 | { | |
6312 | insn = get_aarch64_insn (buf); | |
6313 | insn |= encode_adr_imm (value); | |
6314 | put_aarch64_insn (buf, insn); | |
6315 | } | |
6316 | break; | |
6317 | ||
6318 | case BFD_RELOC_AARCH64_BRANCH19: | |
6319 | if (value & 3) | |
6320 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6321 | _("conditional branch target not word aligned")); | |
6322 | if (signed_overflow (value, 21)) | |
6323 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6324 | _("conditional branch out of range")); | |
6325 | if (fixP->fx_done || !seg->use_rela_p) | |
6326 | { | |
6327 | insn = get_aarch64_insn (buf); | |
6328 | insn |= encode_cond_branch_ofs_19 (value >> 2); | |
6329 | put_aarch64_insn (buf, insn); | |
6330 | } | |
6331 | break; | |
6332 | ||
6333 | case BFD_RELOC_AARCH64_TSTBR14: | |
6334 | if (value & 3) | |
6335 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6336 | _("conditional branch target not word aligned")); | |
6337 | if (signed_overflow (value, 16)) | |
6338 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6339 | _("conditional branch out of range")); | |
6340 | if (fixP->fx_done || !seg->use_rela_p) | |
6341 | { | |
6342 | insn = get_aarch64_insn (buf); | |
6343 | insn |= encode_tst_branch_ofs_14 (value >> 2); | |
6344 | put_aarch64_insn (buf, insn); | |
6345 | } | |
6346 | break; | |
6347 | ||
6348 | case BFD_RELOC_AARCH64_JUMP26: | |
6349 | case BFD_RELOC_AARCH64_CALL26: | |
6350 | if (value & 3) | |
6351 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6352 | _("branch target not word aligned")); | |
6353 | if (signed_overflow (value, 28)) | |
6354 | as_bad_where (fixP->fx_file, fixP->fx_line, _("branch out of range")); | |
6355 | if (fixP->fx_done || !seg->use_rela_p) | |
6356 | { | |
6357 | insn = get_aarch64_insn (buf); | |
6358 | insn |= encode_branch_ofs_26 (value >> 2); | |
6359 | put_aarch64_insn (buf, insn); | |
6360 | } | |
6361 | break; | |
6362 | ||
6363 | case BFD_RELOC_AARCH64_MOVW_G0: | |
6364 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
6365 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
6366 | scale = 0; | |
6367 | goto movw_common; | |
6368 | case BFD_RELOC_AARCH64_MOVW_G1: | |
6369 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
6370 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
6371 | scale = 16; | |
6372 | goto movw_common; | |
6373 | case BFD_RELOC_AARCH64_MOVW_G2: | |
6374 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
6375 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
6376 | scale = 32; | |
6377 | goto movw_common; | |
6378 | case BFD_RELOC_AARCH64_MOVW_G3: | |
6379 | scale = 48; | |
6380 | movw_common: | |
6381 | if (fixP->fx_done || !seg->use_rela_p) | |
6382 | { | |
6383 | insn = get_aarch64_insn (buf); | |
6384 | ||
6385 | if (!fixP->fx_done) | |
6386 | { | |
6387 | /* REL signed addend must fit in 16 bits */ | |
6388 | if (signed_overflow (value, 16)) | |
6389 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6390 | _("offset out of range")); | |
6391 | } | |
6392 | else | |
6393 | { | |
6394 | /* Check for overflow and scale. */ | |
6395 | switch (fixP->fx_r_type) | |
6396 | { | |
6397 | case BFD_RELOC_AARCH64_MOVW_G0: | |
6398 | case BFD_RELOC_AARCH64_MOVW_G1: | |
6399 | case BFD_RELOC_AARCH64_MOVW_G2: | |
6400 | case BFD_RELOC_AARCH64_MOVW_G3: | |
6401 | if (unsigned_overflow (value, scale + 16)) | |
6402 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6403 | _("unsigned value out of range")); | |
6404 | break; | |
6405 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
6406 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
6407 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
6408 | /* NOTE: We can only come here with movz or movn. */ | |
6409 | if (signed_overflow (value, scale + 16)) | |
6410 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6411 | _("signed value out of range")); | |
6412 | if (value < 0) | |
6413 | { | |
6414 | /* Force use of MOVN. */ | |
6415 | value = ~value; | |
6416 | insn = reencode_movzn_to_movn (insn); | |
6417 | } | |
6418 | else | |
6419 | { | |
6420 | /* Force use of MOVZ. */ | |
6421 | insn = reencode_movzn_to_movz (insn); | |
6422 | } | |
6423 | break; | |
6424 | default: | |
6425 | /* Unchecked relocations. */ | |
6426 | break; | |
6427 | } | |
6428 | value >>= scale; | |
6429 | } | |
6430 | ||
6431 | /* Insert value into MOVN/MOVZ/MOVK instruction. */ | |
6432 | insn |= encode_movw_imm (value & 0xffff); | |
6433 | ||
6434 | put_aarch64_insn (buf, insn); | |
6435 | } | |
6436 | break; | |
6437 | ||
6438 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
6439 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
6440 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
6441 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
6442 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: | |
6443 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
6444 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
6445 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
6446 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
6447 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6448 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
6449 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
6450 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE: | |
6451 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
6452 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
6453 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
6454 | /* Should always be exported to object file, see | |
6455 | aarch64_force_relocation(). */ | |
6456 | gas_assert (!fixP->fx_done); | |
6457 | gas_assert (seg->use_rela_p); | |
6458 | break; | |
6459 | ||
6460 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
6461 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
6462 | case BFD_RELOC_AARCH64_ADD_LO12: | |
6463 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
6464 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
6465 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
6466 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
6467 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
f41aef5f | 6468 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
6469 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
6470 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
6471 | /* Should always be exported to object file, see | |
6472 | aarch64_force_relocation(). */ | |
6473 | gas_assert (!fixP->fx_done); | |
6474 | gas_assert (seg->use_rela_p); | |
6475 | break; | |
6476 | ||
6477 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
6478 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
6479 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
6480 | break; | |
6481 | ||
6482 | default: | |
6483 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6484 | _("unexpected %s fixup"), | |
6485 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
6486 | break; | |
6487 | } | |
6488 | ||
6489 | apply_fix_return: | |
6490 | /* Free the allocated the struct aarch64_inst. | |
6491 | N.B. currently there are very limited number of fix-up types actually use | |
6492 | this field, so the impact on the performance should be minimal . */ | |
6493 | if (fixP->tc_fix_data.inst != NULL) | |
6494 | free (fixP->tc_fix_data.inst); | |
6495 | ||
6496 | return; | |
6497 | } | |
6498 | ||
6499 | /* Translate internal representation of relocation info to BFD target | |
6500 | format. */ | |
6501 | ||
6502 | arelent * | |
6503 | tc_gen_reloc (asection * section, fixS * fixp) | |
6504 | { | |
6505 | arelent *reloc; | |
6506 | bfd_reloc_code_real_type code; | |
6507 | ||
6508 | reloc = xmalloc (sizeof (arelent)); | |
6509 | ||
6510 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
6511 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
6512 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
6513 | ||
6514 | if (fixp->fx_pcrel) | |
6515 | { | |
6516 | if (section->use_rela_p) | |
6517 | fixp->fx_offset -= md_pcrel_from_section (fixp, section); | |
6518 | else | |
6519 | fixp->fx_offset = reloc->address; | |
6520 | } | |
6521 | reloc->addend = fixp->fx_offset; | |
6522 | ||
6523 | code = fixp->fx_r_type; | |
6524 | switch (code) | |
6525 | { | |
6526 | case BFD_RELOC_16: | |
6527 | if (fixp->fx_pcrel) | |
6528 | code = BFD_RELOC_16_PCREL; | |
6529 | break; | |
6530 | ||
6531 | case BFD_RELOC_32: | |
6532 | if (fixp->fx_pcrel) | |
6533 | code = BFD_RELOC_32_PCREL; | |
6534 | break; | |
6535 | ||
6536 | case BFD_RELOC_64: | |
6537 | if (fixp->fx_pcrel) | |
6538 | code = BFD_RELOC_64_PCREL; | |
6539 | break; | |
6540 | ||
6541 | default: | |
6542 | break; | |
6543 | } | |
6544 | ||
6545 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
6546 | if (reloc->howto == NULL) | |
6547 | { | |
6548 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
6549 | _ | |
6550 | ("cannot represent %s relocation in this object file format"), | |
6551 | bfd_get_reloc_code_name (code)); | |
6552 | return NULL; | |
6553 | } | |
6554 | ||
6555 | return reloc; | |
6556 | } | |
6557 | ||
6558 | /* This fix_new is called by cons via TC_CONS_FIX_NEW. */ | |
6559 | ||
6560 | void | |
6561 | cons_fix_new_aarch64 (fragS * frag, int where, int size, expressionS * exp) | |
6562 | { | |
6563 | bfd_reloc_code_real_type type; | |
6564 | int pcrel = 0; | |
6565 | ||
6566 | /* Pick a reloc. | |
6567 | FIXME: @@ Should look at CPU word size. */ | |
6568 | switch (size) | |
6569 | { | |
6570 | case 1: | |
6571 | type = BFD_RELOC_8; | |
6572 | break; | |
6573 | case 2: | |
6574 | type = BFD_RELOC_16; | |
6575 | break; | |
6576 | case 4: | |
6577 | type = BFD_RELOC_32; | |
6578 | break; | |
6579 | case 8: | |
6580 | type = BFD_RELOC_64; | |
6581 | break; | |
6582 | default: | |
6583 | as_bad (_("cannot do %u-byte relocation"), size); | |
6584 | type = BFD_RELOC_UNUSED; | |
6585 | break; | |
6586 | } | |
6587 | ||
6588 | fix_new_exp (frag, where, (int) size, exp, pcrel, type); | |
6589 | } | |
6590 | ||
6591 | int | |
6592 | aarch64_force_relocation (struct fix *fixp) | |
6593 | { | |
6594 | switch (fixp->fx_r_type) | |
6595 | { | |
6596 | case BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP: | |
6597 | /* Perform these "immediate" internal relocations | |
6598 | even if the symbol is extern or weak. */ | |
6599 | return 0; | |
6600 | ||
6601 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: | |
6602 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: | |
6603 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
6604 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
6605 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: | |
6606 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
6607 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
6608 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
6609 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
6610 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6611 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
6612 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
6613 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE: | |
6614 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
6615 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
6616 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
6617 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
6618 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
6619 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
6620 | case BFD_RELOC_AARCH64_ADD_LO12: | |
6621 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
6622 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
6623 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
6624 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
6625 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
f41aef5f | 6626 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
6627 | /* Always leave these relocations for the linker. */ |
6628 | return 1; | |
6629 | ||
6630 | default: | |
6631 | break; | |
6632 | } | |
6633 | ||
6634 | return generic_force_reloc (fixp); | |
6635 | } | |
6636 | ||
6637 | #ifdef OBJ_ELF | |
6638 | ||
6639 | const char * | |
6640 | elf64_aarch64_target_format (void) | |
6641 | { | |
6642 | if (target_big_endian) | |
6643 | return "elf64-bigaarch64"; | |
6644 | else | |
6645 | return "elf64-littleaarch64"; | |
6646 | } | |
6647 | ||
6648 | void | |
6649 | aarch64elf_frob_symbol (symbolS * symp, int *puntp) | |
6650 | { | |
6651 | elf_frob_symbol (symp, puntp); | |
6652 | } | |
6653 | #endif | |
6654 | ||
6655 | /* MD interface: Finalization. */ | |
6656 | ||
6657 | /* A good place to do this, although this was probably not intended | |
6658 | for this kind of use. We need to dump the literal pool before | |
6659 | references are made to a null symbol pointer. */ | |
6660 | ||
6661 | void | |
6662 | aarch64_cleanup (void) | |
6663 | { | |
6664 | literal_pool *pool; | |
6665 | ||
6666 | for (pool = list_of_pools; pool; pool = pool->next) | |
6667 | { | |
6668 | /* Put it at the end of the relevant section. */ | |
6669 | subseg_set (pool->section, pool->sub_section); | |
6670 | s_ltorg (0); | |
6671 | } | |
6672 | } | |
6673 | ||
6674 | #ifdef OBJ_ELF | |
6675 | /* Remove any excess mapping symbols generated for alignment frags in | |
6676 | SEC. We may have created a mapping symbol before a zero byte | |
6677 | alignment; remove it if there's a mapping symbol after the | |
6678 | alignment. */ | |
6679 | static void | |
6680 | check_mapping_symbols (bfd * abfd ATTRIBUTE_UNUSED, asection * sec, | |
6681 | void *dummy ATTRIBUTE_UNUSED) | |
6682 | { | |
6683 | segment_info_type *seginfo = seg_info (sec); | |
6684 | fragS *fragp; | |
6685 | ||
6686 | if (seginfo == NULL || seginfo->frchainP == NULL) | |
6687 | return; | |
6688 | ||
6689 | for (fragp = seginfo->frchainP->frch_root; | |
6690 | fragp != NULL; fragp = fragp->fr_next) | |
6691 | { | |
6692 | symbolS *sym = fragp->tc_frag_data.last_map; | |
6693 | fragS *next = fragp->fr_next; | |
6694 | ||
6695 | /* Variable-sized frags have been converted to fixed size by | |
6696 | this point. But if this was variable-sized to start with, | |
6697 | there will be a fixed-size frag after it. So don't handle | |
6698 | next == NULL. */ | |
6699 | if (sym == NULL || next == NULL) | |
6700 | continue; | |
6701 | ||
6702 | if (S_GET_VALUE (sym) < next->fr_address) | |
6703 | /* Not at the end of this frag. */ | |
6704 | continue; | |
6705 | know (S_GET_VALUE (sym) == next->fr_address); | |
6706 | ||
6707 | do | |
6708 | { | |
6709 | if (next->tc_frag_data.first_map != NULL) | |
6710 | { | |
6711 | /* Next frag starts with a mapping symbol. Discard this | |
6712 | one. */ | |
6713 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
6714 | break; | |
6715 | } | |
6716 | ||
6717 | if (next->fr_next == NULL) | |
6718 | { | |
6719 | /* This mapping symbol is at the end of the section. Discard | |
6720 | it. */ | |
6721 | know (next->fr_fix == 0 && next->fr_var == 0); | |
6722 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
6723 | break; | |
6724 | } | |
6725 | ||
6726 | /* As long as we have empty frags without any mapping symbols, | |
6727 | keep looking. */ | |
6728 | /* If the next frag is non-empty and does not start with a | |
6729 | mapping symbol, then this mapping symbol is required. */ | |
6730 | if (next->fr_address != next->fr_next->fr_address) | |
6731 | break; | |
6732 | ||
6733 | next = next->fr_next; | |
6734 | } | |
6735 | while (next != NULL); | |
6736 | } | |
6737 | } | |
6738 | #endif | |
6739 | ||
6740 | /* Adjust the symbol table. */ | |
6741 | ||
6742 | void | |
6743 | aarch64_adjust_symtab (void) | |
6744 | { | |
6745 | #ifdef OBJ_ELF | |
6746 | /* Remove any overlapping mapping symbols generated by alignment frags. */ | |
6747 | bfd_map_over_sections (stdoutput, check_mapping_symbols, (char *) 0); | |
6748 | /* Now do generic ELF adjustments. */ | |
6749 | elf_adjust_symtab (); | |
6750 | #endif | |
6751 | } | |
6752 | ||
6753 | static void | |
6754 | checked_hash_insert (struct hash_control *table, const char *key, void *value) | |
6755 | { | |
6756 | const char *hash_err; | |
6757 | ||
6758 | hash_err = hash_insert (table, key, value); | |
6759 | if (hash_err) | |
6760 | printf ("Internal Error: Can't hash %s\n", key); | |
6761 | } | |
6762 | ||
6763 | static void | |
6764 | fill_instruction_hash_table (void) | |
6765 | { | |
6766 | aarch64_opcode *opcode = aarch64_opcode_table; | |
6767 | ||
6768 | while (opcode->name != NULL) | |
6769 | { | |
6770 | templates *templ, *new_templ; | |
6771 | templ = hash_find (aarch64_ops_hsh, opcode->name); | |
6772 | ||
6773 | new_templ = (templates *) xmalloc (sizeof (templates)); | |
6774 | new_templ->opcode = opcode; | |
6775 | new_templ->next = NULL; | |
6776 | ||
6777 | if (!templ) | |
6778 | checked_hash_insert (aarch64_ops_hsh, opcode->name, (void *) new_templ); | |
6779 | else | |
6780 | { | |
6781 | new_templ->next = templ->next; | |
6782 | templ->next = new_templ; | |
6783 | } | |
6784 | ++opcode; | |
6785 | } | |
6786 | } | |
6787 | ||
6788 | static inline void | |
6789 | convert_to_upper (char *dst, const char *src, size_t num) | |
6790 | { | |
6791 | unsigned int i; | |
6792 | for (i = 0; i < num && *src != '\0'; ++i, ++dst, ++src) | |
6793 | *dst = TOUPPER (*src); | |
6794 | *dst = '\0'; | |
6795 | } | |
6796 | ||
6797 | /* Assume STR point to a lower-case string, allocate, convert and return | |
6798 | the corresponding upper-case string. */ | |
6799 | static inline const char* | |
6800 | get_upper_str (const char *str) | |
6801 | { | |
6802 | char *ret; | |
6803 | size_t len = strlen (str); | |
6804 | if ((ret = xmalloc (len + 1)) == NULL) | |
6805 | abort (); | |
6806 | convert_to_upper (ret, str, len); | |
6807 | return ret; | |
6808 | } | |
6809 | ||
6810 | /* MD interface: Initialization. */ | |
6811 | ||
6812 | void | |
6813 | md_begin (void) | |
6814 | { | |
6815 | unsigned mach; | |
6816 | unsigned int i; | |
6817 | ||
6818 | if ((aarch64_ops_hsh = hash_new ()) == NULL | |
6819 | || (aarch64_cond_hsh = hash_new ()) == NULL | |
6820 | || (aarch64_shift_hsh = hash_new ()) == NULL | |
6821 | || (aarch64_sys_regs_hsh = hash_new ()) == NULL | |
6822 | || (aarch64_pstatefield_hsh = hash_new ()) == NULL | |
6823 | || (aarch64_sys_regs_ic_hsh = hash_new ()) == NULL | |
6824 | || (aarch64_sys_regs_dc_hsh = hash_new ()) == NULL | |
6825 | || (aarch64_sys_regs_at_hsh = hash_new ()) == NULL | |
6826 | || (aarch64_sys_regs_tlbi_hsh = hash_new ()) == NULL | |
6827 | || (aarch64_reg_hsh = hash_new ()) == NULL | |
6828 | || (aarch64_barrier_opt_hsh = hash_new ()) == NULL | |
6829 | || (aarch64_nzcv_hsh = hash_new ()) == NULL | |
6830 | || (aarch64_pldop_hsh = hash_new ()) == NULL) | |
6831 | as_fatal (_("virtual memory exhausted")); | |
6832 | ||
6833 | fill_instruction_hash_table (); | |
6834 | ||
6835 | for (i = 0; aarch64_sys_regs[i].name != NULL; ++i) | |
6836 | checked_hash_insert (aarch64_sys_regs_hsh, aarch64_sys_regs[i].name, | |
6837 | (void *) (aarch64_sys_regs + i)); | |
6838 | ||
6839 | for (i = 0; aarch64_pstatefields[i].name != NULL; ++i) | |
6840 | checked_hash_insert (aarch64_pstatefield_hsh, | |
6841 | aarch64_pstatefields[i].name, | |
6842 | (void *) (aarch64_pstatefields + i)); | |
6843 | ||
6844 | for (i = 0; aarch64_sys_regs_ic[i].template != NULL; i++) | |
6845 | checked_hash_insert (aarch64_sys_regs_ic_hsh, | |
6846 | aarch64_sys_regs_ic[i].template, | |
6847 | (void *) (aarch64_sys_regs_ic + i)); | |
6848 | ||
6849 | for (i = 0; aarch64_sys_regs_dc[i].template != NULL; i++) | |
6850 | checked_hash_insert (aarch64_sys_regs_dc_hsh, | |
6851 | aarch64_sys_regs_dc[i].template, | |
6852 | (void *) (aarch64_sys_regs_dc + i)); | |
6853 | ||
6854 | for (i = 0; aarch64_sys_regs_at[i].template != NULL; i++) | |
6855 | checked_hash_insert (aarch64_sys_regs_at_hsh, | |
6856 | aarch64_sys_regs_at[i].template, | |
6857 | (void *) (aarch64_sys_regs_at + i)); | |
6858 | ||
6859 | for (i = 0; aarch64_sys_regs_tlbi[i].template != NULL; i++) | |
6860 | checked_hash_insert (aarch64_sys_regs_tlbi_hsh, | |
6861 | aarch64_sys_regs_tlbi[i].template, | |
6862 | (void *) (aarch64_sys_regs_tlbi + i)); | |
6863 | ||
6864 | for (i = 0; i < ARRAY_SIZE (reg_names); i++) | |
6865 | checked_hash_insert (aarch64_reg_hsh, reg_names[i].name, | |
6866 | (void *) (reg_names + i)); | |
6867 | ||
6868 | for (i = 0; i < ARRAY_SIZE (nzcv_names); i++) | |
6869 | checked_hash_insert (aarch64_nzcv_hsh, nzcv_names[i].template, | |
6870 | (void *) (nzcv_names + i)); | |
6871 | ||
6872 | for (i = 0; aarch64_operand_modifiers[i].name != NULL; i++) | |
6873 | { | |
6874 | const char *name = aarch64_operand_modifiers[i].name; | |
6875 | checked_hash_insert (aarch64_shift_hsh, name, | |
6876 | (void *) (aarch64_operand_modifiers + i)); | |
6877 | /* Also hash the name in the upper case. */ | |
6878 | checked_hash_insert (aarch64_shift_hsh, get_upper_str (name), | |
6879 | (void *) (aarch64_operand_modifiers + i)); | |
6880 | } | |
6881 | ||
6882 | for (i = 0; i < ARRAY_SIZE (aarch64_conds); i++) | |
6883 | { | |
6884 | unsigned int j; | |
6885 | /* A condition code may have alias(es), e.g. "cc", "lo" and "ul" are | |
6886 | the same condition code. */ | |
6887 | for (j = 0; j < ARRAY_SIZE (aarch64_conds[i].names); ++j) | |
6888 | { | |
6889 | const char *name = aarch64_conds[i].names[j]; | |
6890 | if (name == NULL) | |
6891 | break; | |
6892 | checked_hash_insert (aarch64_cond_hsh, name, | |
6893 | (void *) (aarch64_conds + i)); | |
6894 | /* Also hash the name in the upper case. */ | |
6895 | checked_hash_insert (aarch64_cond_hsh, get_upper_str (name), | |
6896 | (void *) (aarch64_conds + i)); | |
6897 | } | |
6898 | } | |
6899 | ||
6900 | for (i = 0; i < ARRAY_SIZE (aarch64_barrier_options); i++) | |
6901 | { | |
6902 | const char *name = aarch64_barrier_options[i].name; | |
6903 | /* Skip xx00 - the unallocated values of option. */ | |
6904 | if ((i & 0x3) == 0) | |
6905 | continue; | |
6906 | checked_hash_insert (aarch64_barrier_opt_hsh, name, | |
6907 | (void *) (aarch64_barrier_options + i)); | |
6908 | /* Also hash the name in the upper case. */ | |
6909 | checked_hash_insert (aarch64_barrier_opt_hsh, get_upper_str (name), | |
6910 | (void *) (aarch64_barrier_options + i)); | |
6911 | } | |
6912 | ||
6913 | for (i = 0; i < ARRAY_SIZE (aarch64_prfops); i++) | |
6914 | { | |
6915 | const char* name = aarch64_prfops[i].name; | |
6916 | /* Skip 0011x, 01xxx, 1011x and 11xxx - the unallocated hint encodings | |
6917 | as a 5-bit immediate #uimm5. */ | |
6918 | if ((i & 0xf) >= 6) | |
6919 | continue; | |
6920 | checked_hash_insert (aarch64_pldop_hsh, name, | |
6921 | (void *) (aarch64_prfops + i)); | |
6922 | /* Also hash the name in the upper case. */ | |
6923 | checked_hash_insert (aarch64_pldop_hsh, get_upper_str (name), | |
6924 | (void *) (aarch64_prfops + i)); | |
6925 | } | |
6926 | ||
6927 | /* Set the cpu variant based on the command-line options. */ | |
6928 | if (!mcpu_cpu_opt) | |
6929 | mcpu_cpu_opt = march_cpu_opt; | |
6930 | ||
6931 | if (!mcpu_cpu_opt) | |
6932 | mcpu_cpu_opt = &cpu_default; | |
6933 | ||
6934 | cpu_variant = *mcpu_cpu_opt; | |
6935 | ||
6936 | /* Record the CPU type. */ | |
6937 | mach = bfd_mach_aarch64; | |
6938 | ||
6939 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach); | |
6940 | } | |
6941 | ||
6942 | /* Command line processing. */ | |
6943 | ||
6944 | const char *md_shortopts = "m:"; | |
6945 | ||
6946 | #ifdef AARCH64_BI_ENDIAN | |
6947 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
6948 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
6949 | #else | |
6950 | #if TARGET_BYTES_BIG_ENDIAN | |
6951 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
6952 | #else | |
6953 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
6954 | #endif | |
6955 | #endif | |
6956 | ||
6957 | struct option md_longopts[] = { | |
6958 | #ifdef OPTION_EB | |
6959 | {"EB", no_argument, NULL, OPTION_EB}, | |
6960 | #endif | |
6961 | #ifdef OPTION_EL | |
6962 | {"EL", no_argument, NULL, OPTION_EL}, | |
6963 | #endif | |
6964 | {NULL, no_argument, NULL, 0} | |
6965 | }; | |
6966 | ||
6967 | size_t md_longopts_size = sizeof (md_longopts); | |
6968 | ||
6969 | struct aarch64_option_table | |
6970 | { | |
6971 | char *option; /* Option name to match. */ | |
6972 | char *help; /* Help information. */ | |
6973 | int *var; /* Variable to change. */ | |
6974 | int value; /* What to change it to. */ | |
6975 | char *deprecated; /* If non-null, print this message. */ | |
6976 | }; | |
6977 | ||
6978 | static struct aarch64_option_table aarch64_opts[] = { | |
6979 | {"mbig-endian", N_("assemble for big-endian"), &target_big_endian, 1, NULL}, | |
6980 | {"mlittle-endian", N_("assemble for little-endian"), &target_big_endian, 0, | |
6981 | NULL}, | |
6982 | #ifdef DEBUG_AARCH64 | |
6983 | {"mdebug-dump", N_("temporary switch for dumping"), &debug_dump, 1, NULL}, | |
6984 | #endif /* DEBUG_AARCH64 */ | |
6985 | {"mverbose-error", N_("output verbose error messages"), &verbose_error_p, 1, | |
6986 | NULL}, | |
6987 | {NULL, NULL, NULL, 0, NULL} | |
6988 | }; | |
6989 | ||
6990 | struct aarch64_cpu_option_table | |
6991 | { | |
6992 | char *name; | |
6993 | const aarch64_feature_set value; | |
6994 | /* The canonical name of the CPU, or NULL to use NAME converted to upper | |
6995 | case. */ | |
6996 | const char *canonical_name; | |
6997 | }; | |
6998 | ||
6999 | /* This list should, at a minimum, contain all the cpu names | |
7000 | recognized by GCC. */ | |
7001 | static const struct aarch64_cpu_option_table aarch64_cpus[] = { | |
7002 | {"all", AARCH64_ANY, NULL}, | |
7003 | {"generic", AARCH64_ARCH_V8, NULL}, | |
7004 | ||
7005 | /* These two are example CPUs supported in GCC, once we have real | |
7006 | CPUs they will be removed. */ | |
7007 | {"example-1", AARCH64_ARCH_V8, NULL}, | |
7008 | {"example-2", AARCH64_ARCH_V8, NULL}, | |
7009 | ||
7010 | {NULL, AARCH64_ARCH_NONE, NULL} | |
7011 | }; | |
7012 | ||
7013 | struct aarch64_arch_option_table | |
7014 | { | |
7015 | char *name; | |
7016 | const aarch64_feature_set value; | |
7017 | }; | |
7018 | ||
7019 | /* This list should, at a minimum, contain all the architecture names | |
7020 | recognized by GCC. */ | |
7021 | static const struct aarch64_arch_option_table aarch64_archs[] = { | |
7022 | {"all", AARCH64_ANY}, | |
5a1ad39d | 7023 | {"armv8-a", AARCH64_ARCH_V8}, |
a06ea964 NC |
7024 | {NULL, AARCH64_ARCH_NONE} |
7025 | }; | |
7026 | ||
7027 | /* ISA extensions. */ | |
7028 | struct aarch64_option_cpu_value_table | |
7029 | { | |
7030 | char *name; | |
7031 | const aarch64_feature_set value; | |
7032 | }; | |
7033 | ||
7034 | static const struct aarch64_option_cpu_value_table aarch64_features[] = { | |
7035 | {"crypto", AARCH64_FEATURE (AARCH64_FEATURE_CRYPTO, 0)}, | |
7036 | {"fp", AARCH64_FEATURE (AARCH64_FEATURE_FP, 0)}, | |
7037 | {"simd", AARCH64_FEATURE (AARCH64_FEATURE_SIMD, 0)}, | |
7038 | {NULL, AARCH64_ARCH_NONE} | |
7039 | }; | |
7040 | ||
7041 | struct aarch64_long_option_table | |
7042 | { | |
7043 | char *option; /* Substring to match. */ | |
7044 | char *help; /* Help information. */ | |
7045 | int (*func) (char *subopt); /* Function to decode sub-option. */ | |
7046 | char *deprecated; /* If non-null, print this message. */ | |
7047 | }; | |
7048 | ||
7049 | static int | |
7050 | aarch64_parse_features (char *str, const aarch64_feature_set **opt_p) | |
7051 | { | |
7052 | /* We insist on extensions being added before being removed. We achieve | |
7053 | this by using the ADDING_VALUE variable to indicate whether we are | |
7054 | adding an extension (1) or removing it (0) and only allowing it to | |
7055 | change in the order -1 -> 1 -> 0. */ | |
7056 | int adding_value = -1; | |
7057 | aarch64_feature_set *ext_set = xmalloc (sizeof (aarch64_feature_set)); | |
7058 | ||
7059 | /* Copy the feature set, so that we can modify it. */ | |
7060 | *ext_set = **opt_p; | |
7061 | *opt_p = ext_set; | |
7062 | ||
7063 | while (str != NULL && *str != 0) | |
7064 | { | |
7065 | const struct aarch64_option_cpu_value_table *opt; | |
7066 | char *ext; | |
7067 | int optlen; | |
7068 | ||
7069 | if (*str != '+') | |
7070 | { | |
7071 | as_bad (_("invalid architectural extension")); | |
7072 | return 0; | |
7073 | } | |
7074 | ||
7075 | str++; | |
7076 | ext = strchr (str, '+'); | |
7077 | ||
7078 | if (ext != NULL) | |
7079 | optlen = ext - str; | |
7080 | else | |
7081 | optlen = strlen (str); | |
7082 | ||
7083 | if (optlen >= 2 && strncmp (str, "no", 2) == 0) | |
7084 | { | |
7085 | if (adding_value != 0) | |
7086 | adding_value = 0; | |
7087 | optlen -= 2; | |
7088 | str += 2; | |
7089 | } | |
7090 | else if (optlen > 0) | |
7091 | { | |
7092 | if (adding_value == -1) | |
7093 | adding_value = 1; | |
7094 | else if (adding_value != 1) | |
7095 | { | |
7096 | as_bad (_("must specify extensions to add before specifying " | |
7097 | "those to remove")); | |
7098 | return FALSE; | |
7099 | } | |
7100 | } | |
7101 | ||
7102 | if (optlen == 0) | |
7103 | { | |
7104 | as_bad (_("missing architectural extension")); | |
7105 | return 0; | |
7106 | } | |
7107 | ||
7108 | gas_assert (adding_value != -1); | |
7109 | ||
7110 | for (opt = aarch64_features; opt->name != NULL; opt++) | |
7111 | if (strncmp (opt->name, str, optlen) == 0) | |
7112 | { | |
7113 | /* Add or remove the extension. */ | |
7114 | if (adding_value) | |
7115 | AARCH64_MERGE_FEATURE_SETS (*ext_set, *ext_set, opt->value); | |
7116 | else | |
7117 | AARCH64_CLEAR_FEATURE (*ext_set, *ext_set, opt->value); | |
7118 | break; | |
7119 | } | |
7120 | ||
7121 | if (opt->name == NULL) | |
7122 | { | |
7123 | as_bad (_("unknown architectural extension `%s'"), str); | |
7124 | return 0; | |
7125 | } | |
7126 | ||
7127 | str = ext; | |
7128 | }; | |
7129 | ||
7130 | return 1; | |
7131 | } | |
7132 | ||
7133 | static int | |
7134 | aarch64_parse_cpu (char *str) | |
7135 | { | |
7136 | const struct aarch64_cpu_option_table *opt; | |
7137 | char *ext = strchr (str, '+'); | |
7138 | size_t optlen; | |
7139 | ||
7140 | if (ext != NULL) | |
7141 | optlen = ext - str; | |
7142 | else | |
7143 | optlen = strlen (str); | |
7144 | ||
7145 | if (optlen == 0) | |
7146 | { | |
7147 | as_bad (_("missing cpu name `%s'"), str); | |
7148 | return 0; | |
7149 | } | |
7150 | ||
7151 | for (opt = aarch64_cpus; opt->name != NULL; opt++) | |
7152 | if (strlen (opt->name) == optlen && strncmp (str, opt->name, optlen) == 0) | |
7153 | { | |
7154 | mcpu_cpu_opt = &opt->value; | |
7155 | if (ext != NULL) | |
7156 | return aarch64_parse_features (ext, &mcpu_cpu_opt); | |
7157 | ||
7158 | return 1; | |
7159 | } | |
7160 | ||
7161 | as_bad (_("unknown cpu `%s'"), str); | |
7162 | return 0; | |
7163 | } | |
7164 | ||
7165 | static int | |
7166 | aarch64_parse_arch (char *str) | |
7167 | { | |
7168 | const struct aarch64_arch_option_table *opt; | |
7169 | char *ext = strchr (str, '+'); | |
7170 | size_t optlen; | |
7171 | ||
7172 | if (ext != NULL) | |
7173 | optlen = ext - str; | |
7174 | else | |
7175 | optlen = strlen (str); | |
7176 | ||
7177 | if (optlen == 0) | |
7178 | { | |
7179 | as_bad (_("missing architecture name `%s'"), str); | |
7180 | return 0; | |
7181 | } | |
7182 | ||
7183 | for (opt = aarch64_archs; opt->name != NULL; opt++) | |
7184 | if (strlen (opt->name) == optlen && strncmp (str, opt->name, optlen) == 0) | |
7185 | { | |
7186 | march_cpu_opt = &opt->value; | |
7187 | if (ext != NULL) | |
7188 | return aarch64_parse_features (ext, &march_cpu_opt); | |
7189 | ||
7190 | return 1; | |
7191 | } | |
7192 | ||
7193 | as_bad (_("unknown architecture `%s'\n"), str); | |
7194 | return 0; | |
7195 | } | |
7196 | ||
7197 | static struct aarch64_long_option_table aarch64_long_opts[] = { | |
7198 | {"mcpu=", N_("<cpu name>\t assemble for CPU <cpu name>"), | |
7199 | aarch64_parse_cpu, NULL}, | |
7200 | {"march=", N_("<arch name>\t assemble for architecture <arch name>"), | |
7201 | aarch64_parse_arch, NULL}, | |
7202 | {NULL, NULL, 0, NULL} | |
7203 | }; | |
7204 | ||
7205 | int | |
7206 | md_parse_option (int c, char *arg) | |
7207 | { | |
7208 | struct aarch64_option_table *opt; | |
7209 | struct aarch64_long_option_table *lopt; | |
7210 | ||
7211 | switch (c) | |
7212 | { | |
7213 | #ifdef OPTION_EB | |
7214 | case OPTION_EB: | |
7215 | target_big_endian = 1; | |
7216 | break; | |
7217 | #endif | |
7218 | ||
7219 | #ifdef OPTION_EL | |
7220 | case OPTION_EL: | |
7221 | target_big_endian = 0; | |
7222 | break; | |
7223 | #endif | |
7224 | ||
7225 | case 'a': | |
7226 | /* Listing option. Just ignore these, we don't support additional | |
7227 | ones. */ | |
7228 | return 0; | |
7229 | ||
7230 | default: | |
7231 | for (opt = aarch64_opts; opt->option != NULL; opt++) | |
7232 | { | |
7233 | if (c == opt->option[0] | |
7234 | && ((arg == NULL && opt->option[1] == 0) | |
7235 | || streq (arg, opt->option + 1))) | |
7236 | { | |
7237 | /* If the option is deprecated, tell the user. */ | |
7238 | if (opt->deprecated != NULL) | |
7239 | as_tsktsk (_("option `-%c%s' is deprecated: %s"), c, | |
7240 | arg ? arg : "", _(opt->deprecated)); | |
7241 | ||
7242 | if (opt->var != NULL) | |
7243 | *opt->var = opt->value; | |
7244 | ||
7245 | return 1; | |
7246 | } | |
7247 | } | |
7248 | ||
7249 | for (lopt = aarch64_long_opts; lopt->option != NULL; lopt++) | |
7250 | { | |
7251 | /* These options are expected to have an argument. */ | |
7252 | if (c == lopt->option[0] | |
7253 | && arg != NULL | |
7254 | && strncmp (arg, lopt->option + 1, | |
7255 | strlen (lopt->option + 1)) == 0) | |
7256 | { | |
7257 | /* If the option is deprecated, tell the user. */ | |
7258 | if (lopt->deprecated != NULL) | |
7259 | as_tsktsk (_("option `-%c%s' is deprecated: %s"), c, arg, | |
7260 | _(lopt->deprecated)); | |
7261 | ||
7262 | /* Call the sup-option parser. */ | |
7263 | return lopt->func (arg + strlen (lopt->option) - 1); | |
7264 | } | |
7265 | } | |
7266 | ||
7267 | return 0; | |
7268 | } | |
7269 | ||
7270 | return 1; | |
7271 | } | |
7272 | ||
7273 | void | |
7274 | md_show_usage (FILE * fp) | |
7275 | { | |
7276 | struct aarch64_option_table *opt; | |
7277 | struct aarch64_long_option_table *lopt; | |
7278 | ||
7279 | fprintf (fp, _(" AArch64-specific assembler options:\n")); | |
7280 | ||
7281 | for (opt = aarch64_opts; opt->option != NULL; opt++) | |
7282 | if (opt->help != NULL) | |
7283 | fprintf (fp, " -%-23s%s\n", opt->option, _(opt->help)); | |
7284 | ||
7285 | for (lopt = aarch64_long_opts; lopt->option != NULL; lopt++) | |
7286 | if (lopt->help != NULL) | |
7287 | fprintf (fp, " -%s%s\n", lopt->option, _(lopt->help)); | |
7288 | ||
7289 | #ifdef OPTION_EB | |
7290 | fprintf (fp, _("\ | |
7291 | -EB assemble code for a big-endian cpu\n")); | |
7292 | #endif | |
7293 | ||
7294 | #ifdef OPTION_EL | |
7295 | fprintf (fp, _("\ | |
7296 | -EL assemble code for a little-endian cpu\n")); | |
7297 | #endif | |
7298 | } | |
7299 | ||
7300 | /* Parse a .cpu directive. */ | |
7301 | ||
7302 | static void | |
7303 | s_aarch64_cpu (int ignored ATTRIBUTE_UNUSED) | |
7304 | { | |
7305 | const struct aarch64_cpu_option_table *opt; | |
7306 | char saved_char; | |
7307 | char *name; | |
7308 | char *ext; | |
7309 | size_t optlen; | |
7310 | ||
7311 | name = input_line_pointer; | |
7312 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
7313 | input_line_pointer++; | |
7314 | saved_char = *input_line_pointer; | |
7315 | *input_line_pointer = 0; | |
7316 | ||
7317 | ext = strchr (name, '+'); | |
7318 | ||
7319 | if (ext != NULL) | |
7320 | optlen = ext - name; | |
7321 | else | |
7322 | optlen = strlen (name); | |
7323 | ||
7324 | /* Skip the first "all" entry. */ | |
7325 | for (opt = aarch64_cpus + 1; opt->name != NULL; opt++) | |
7326 | if (strlen (opt->name) == optlen | |
7327 | && strncmp (name, opt->name, optlen) == 0) | |
7328 | { | |
7329 | mcpu_cpu_opt = &opt->value; | |
7330 | if (ext != NULL) | |
7331 | if (!aarch64_parse_features (ext, &mcpu_cpu_opt)) | |
7332 | return; | |
7333 | ||
7334 | cpu_variant = *mcpu_cpu_opt; | |
7335 | ||
7336 | *input_line_pointer = saved_char; | |
7337 | demand_empty_rest_of_line (); | |
7338 | return; | |
7339 | } | |
7340 | as_bad (_("unknown cpu `%s'"), name); | |
7341 | *input_line_pointer = saved_char; | |
7342 | ignore_rest_of_line (); | |
7343 | } | |
7344 | ||
7345 | ||
7346 | /* Parse a .arch directive. */ | |
7347 | ||
7348 | static void | |
7349 | s_aarch64_arch (int ignored ATTRIBUTE_UNUSED) | |
7350 | { | |
7351 | const struct aarch64_arch_option_table *opt; | |
7352 | char saved_char; | |
7353 | char *name; | |
7354 | char *ext; | |
7355 | size_t optlen; | |
7356 | ||
7357 | name = input_line_pointer; | |
7358 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
7359 | input_line_pointer++; | |
7360 | saved_char = *input_line_pointer; | |
7361 | *input_line_pointer = 0; | |
7362 | ||
7363 | ext = strchr (name, '+'); | |
7364 | ||
7365 | if (ext != NULL) | |
7366 | optlen = ext - name; | |
7367 | else | |
7368 | optlen = strlen (name); | |
7369 | ||
7370 | /* Skip the first "all" entry. */ | |
7371 | for (opt = aarch64_archs + 1; opt->name != NULL; opt++) | |
7372 | if (strlen (opt->name) == optlen | |
7373 | && strncmp (name, opt->name, optlen) == 0) | |
7374 | { | |
7375 | mcpu_cpu_opt = &opt->value; | |
7376 | if (ext != NULL) | |
7377 | if (!aarch64_parse_features (ext, &mcpu_cpu_opt)) | |
7378 | return; | |
7379 | ||
7380 | cpu_variant = *mcpu_cpu_opt; | |
7381 | ||
7382 | *input_line_pointer = saved_char; | |
7383 | demand_empty_rest_of_line (); | |
7384 | return; | |
7385 | } | |
7386 | ||
7387 | as_bad (_("unknown architecture `%s'\n"), name); | |
7388 | *input_line_pointer = saved_char; | |
7389 | ignore_rest_of_line (); | |
7390 | } | |
7391 | ||
7392 | /* Copy symbol information. */ | |
7393 | ||
7394 | void | |
7395 | aarch64_copy_symbol_attributes (symbolS * dest, symbolS * src) | |
7396 | { | |
7397 | AARCH64_GET_FLAG (dest) = AARCH64_GET_FLAG (src); | |
7398 | } |