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a06ea964 NC |
1 | /* tc-aarch64.c -- Assemble for the AArch64 ISA |
2 | ||
a3251895 YZ |
3 | Copyright 2009, 2010, 2011, 2012, 2013 |
4 | Free Software Foundation, Inc. | |
a06ea964 NC |
5 | Contributed by ARM Ltd. |
6 | ||
7 | This file is part of GAS. | |
8 | ||
9 | GAS is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the license, or | |
12 | (at your option) any later version. | |
13 | ||
14 | GAS is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; see the file COPYING3. If not, | |
21 | see <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include <limits.h> | |
25 | #include <stdarg.h> | |
26 | #include "bfd_stdint.h" | |
27 | #define NO_RELOC 0 | |
28 | #include "safe-ctype.h" | |
29 | #include "subsegs.h" | |
30 | #include "obstack.h" | |
31 | ||
32 | #ifdef OBJ_ELF | |
33 | #include "elf/aarch64.h" | |
34 | #include "dw2gencfi.h" | |
35 | #endif | |
36 | ||
37 | #include "dwarf2dbg.h" | |
38 | ||
39 | /* Types of processor to assemble for. */ | |
40 | #ifndef CPU_DEFAULT | |
41 | #define CPU_DEFAULT AARCH64_ARCH_V8 | |
42 | #endif | |
43 | ||
44 | #define streq(a, b) (strcmp (a, b) == 0) | |
45 | ||
46 | static aarch64_feature_set cpu_variant; | |
47 | ||
48 | /* Variables that we set while parsing command-line options. Once all | |
49 | options have been read we re-process these values to set the real | |
50 | assembly flags. */ | |
51 | static const aarch64_feature_set *mcpu_cpu_opt = NULL; | |
52 | static const aarch64_feature_set *march_cpu_opt = NULL; | |
53 | ||
54 | /* Constants for known architecture features. */ | |
55 | static const aarch64_feature_set cpu_default = CPU_DEFAULT; | |
56 | ||
57 | static const aarch64_feature_set aarch64_arch_any = AARCH64_ANY; | |
58 | static const aarch64_feature_set aarch64_arch_none = AARCH64_ARCH_NONE; | |
59 | ||
60 | #ifdef OBJ_ELF | |
61 | /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
62 | static symbolS *GOT_symbol; | |
cec5225b | 63 | |
69091a2c YZ |
64 | /* Which ABI to use. */ |
65 | enum aarch64_abi_type | |
66 | { | |
67 | AARCH64_ABI_LP64 = 0, | |
68 | AARCH64_ABI_ILP32 = 1 | |
69 | }; | |
70 | ||
71 | /* AArch64 ABI for the output file. */ | |
72 | static enum aarch64_abi_type aarch64_abi = AARCH64_ABI_LP64; | |
73 | ||
cec5225b YZ |
74 | /* When non-zero, program to a 32-bit model, in which the C data types |
75 | int, long and all pointer types are 32-bit objects (ILP32); or to a | |
76 | 64-bit model, in which the C int type is 32-bits but the C long type | |
77 | and all pointer types are 64-bit objects (LP64). */ | |
69091a2c | 78 | #define ilp32_p (aarch64_abi == AARCH64_ABI_ILP32) |
a06ea964 NC |
79 | #endif |
80 | ||
81 | enum neon_el_type | |
82 | { | |
83 | NT_invtype = -1, | |
84 | NT_b, | |
85 | NT_h, | |
86 | NT_s, | |
87 | NT_d, | |
88 | NT_q | |
89 | }; | |
90 | ||
91 | /* Bits for DEFINED field in neon_type_el. */ | |
92 | #define NTA_HASTYPE 1 | |
93 | #define NTA_HASINDEX 2 | |
94 | ||
95 | struct neon_type_el | |
96 | { | |
97 | enum neon_el_type type; | |
98 | unsigned char defined; | |
99 | unsigned width; | |
100 | int64_t index; | |
101 | }; | |
102 | ||
103 | #define FIXUP_F_HAS_EXPLICIT_SHIFT 0x00000001 | |
104 | ||
105 | struct reloc | |
106 | { | |
107 | bfd_reloc_code_real_type type; | |
108 | expressionS exp; | |
109 | int pc_rel; | |
110 | enum aarch64_opnd opnd; | |
111 | uint32_t flags; | |
112 | unsigned need_libopcodes_p : 1; | |
113 | }; | |
114 | ||
115 | struct aarch64_instruction | |
116 | { | |
117 | /* libopcodes structure for instruction intermediate representation. */ | |
118 | aarch64_inst base; | |
119 | /* Record assembly errors found during the parsing. */ | |
120 | struct | |
121 | { | |
122 | enum aarch64_operand_error_kind kind; | |
123 | const char *error; | |
124 | } parsing_error; | |
125 | /* The condition that appears in the assembly line. */ | |
126 | int cond; | |
127 | /* Relocation information (including the GAS internal fixup). */ | |
128 | struct reloc reloc; | |
129 | /* Need to generate an immediate in the literal pool. */ | |
130 | unsigned gen_lit_pool : 1; | |
131 | }; | |
132 | ||
133 | typedef struct aarch64_instruction aarch64_instruction; | |
134 | ||
135 | static aarch64_instruction inst; | |
136 | ||
137 | static bfd_boolean parse_operands (char *, const aarch64_opcode *); | |
138 | static bfd_boolean programmer_friendly_fixup (aarch64_instruction *); | |
139 | ||
140 | /* Diagnostics inline function utilites. | |
141 | ||
142 | These are lightweight utlities which should only be called by parse_operands | |
143 | and other parsers. GAS processes each assembly line by parsing it against | |
144 | instruction template(s), in the case of multiple templates (for the same | |
145 | mnemonic name), those templates are tried one by one until one succeeds or | |
146 | all fail. An assembly line may fail a few templates before being | |
147 | successfully parsed; an error saved here in most cases is not a user error | |
148 | but an error indicating the current template is not the right template. | |
149 | Therefore it is very important that errors can be saved at a low cost during | |
150 | the parsing; we don't want to slow down the whole parsing by recording | |
151 | non-user errors in detail. | |
152 | ||
153 | Remember that the objective is to help GAS pick up the most approapriate | |
154 | error message in the case of multiple templates, e.g. FMOV which has 8 | |
155 | templates. */ | |
156 | ||
157 | static inline void | |
158 | clear_error (void) | |
159 | { | |
160 | inst.parsing_error.kind = AARCH64_OPDE_NIL; | |
161 | inst.parsing_error.error = NULL; | |
162 | } | |
163 | ||
164 | static inline bfd_boolean | |
165 | error_p (void) | |
166 | { | |
167 | return inst.parsing_error.kind != AARCH64_OPDE_NIL; | |
168 | } | |
169 | ||
170 | static inline const char * | |
171 | get_error_message (void) | |
172 | { | |
173 | return inst.parsing_error.error; | |
174 | } | |
175 | ||
176 | static inline void | |
177 | set_error_message (const char *error) | |
178 | { | |
179 | inst.parsing_error.error = error; | |
180 | } | |
181 | ||
182 | static inline enum aarch64_operand_error_kind | |
183 | get_error_kind (void) | |
184 | { | |
185 | return inst.parsing_error.kind; | |
186 | } | |
187 | ||
188 | static inline void | |
189 | set_error_kind (enum aarch64_operand_error_kind kind) | |
190 | { | |
191 | inst.parsing_error.kind = kind; | |
192 | } | |
193 | ||
194 | static inline void | |
195 | set_error (enum aarch64_operand_error_kind kind, const char *error) | |
196 | { | |
197 | inst.parsing_error.kind = kind; | |
198 | inst.parsing_error.error = error; | |
199 | } | |
200 | ||
201 | static inline void | |
202 | set_recoverable_error (const char *error) | |
203 | { | |
204 | set_error (AARCH64_OPDE_RECOVERABLE, error); | |
205 | } | |
206 | ||
207 | /* Use the DESC field of the corresponding aarch64_operand entry to compose | |
208 | the error message. */ | |
209 | static inline void | |
210 | set_default_error (void) | |
211 | { | |
212 | set_error (AARCH64_OPDE_SYNTAX_ERROR, NULL); | |
213 | } | |
214 | ||
215 | static inline void | |
216 | set_syntax_error (const char *error) | |
217 | { | |
218 | set_error (AARCH64_OPDE_SYNTAX_ERROR, error); | |
219 | } | |
220 | ||
221 | static inline void | |
222 | set_first_syntax_error (const char *error) | |
223 | { | |
224 | if (! error_p ()) | |
225 | set_error (AARCH64_OPDE_SYNTAX_ERROR, error); | |
226 | } | |
227 | ||
228 | static inline void | |
229 | set_fatal_syntax_error (const char *error) | |
230 | { | |
231 | set_error (AARCH64_OPDE_FATAL_SYNTAX_ERROR, error); | |
232 | } | |
233 | \f | |
234 | /* Number of littlenums required to hold an extended precision number. */ | |
235 | #define MAX_LITTLENUMS 6 | |
236 | ||
237 | /* Return value for certain parsers when the parsing fails; those parsers | |
238 | return the information of the parsed result, e.g. register number, on | |
239 | success. */ | |
240 | #define PARSE_FAIL -1 | |
241 | ||
242 | /* This is an invalid condition code that means no conditional field is | |
243 | present. */ | |
244 | #define COND_ALWAYS 0x10 | |
245 | ||
246 | typedef struct | |
247 | { | |
248 | const char *template; | |
249 | unsigned long value; | |
250 | } asm_barrier_opt; | |
251 | ||
252 | typedef struct | |
253 | { | |
254 | const char *template; | |
255 | uint32_t value; | |
256 | } asm_nzcv; | |
257 | ||
258 | struct reloc_entry | |
259 | { | |
260 | char *name; | |
261 | bfd_reloc_code_real_type reloc; | |
262 | }; | |
263 | ||
264 | /* Structure for a hash table entry for a register. */ | |
265 | typedef struct | |
266 | { | |
267 | const char *name; | |
268 | unsigned char number; | |
269 | unsigned char type; | |
270 | unsigned char builtin; | |
271 | } reg_entry; | |
272 | ||
273 | /* Macros to define the register types and masks for the purpose | |
274 | of parsing. */ | |
275 | ||
276 | #undef AARCH64_REG_TYPES | |
277 | #define AARCH64_REG_TYPES \ | |
278 | BASIC_REG_TYPE(R_32) /* w[0-30] */ \ | |
279 | BASIC_REG_TYPE(R_64) /* x[0-30] */ \ | |
280 | BASIC_REG_TYPE(SP_32) /* wsp */ \ | |
281 | BASIC_REG_TYPE(SP_64) /* sp */ \ | |
282 | BASIC_REG_TYPE(Z_32) /* wzr */ \ | |
283 | BASIC_REG_TYPE(Z_64) /* xzr */ \ | |
284 | BASIC_REG_TYPE(FP_B) /* b[0-31] *//* NOTE: keep FP_[BHSDQ] consecutive! */\ | |
285 | BASIC_REG_TYPE(FP_H) /* h[0-31] */ \ | |
286 | BASIC_REG_TYPE(FP_S) /* s[0-31] */ \ | |
287 | BASIC_REG_TYPE(FP_D) /* d[0-31] */ \ | |
288 | BASIC_REG_TYPE(FP_Q) /* q[0-31] */ \ | |
289 | BASIC_REG_TYPE(CN) /* c[0-7] */ \ | |
290 | BASIC_REG_TYPE(VN) /* v[0-31] */ \ | |
291 | /* Typecheck: any 64-bit int reg (inc SP exc XZR) */ \ | |
292 | MULTI_REG_TYPE(R64_SP, REG_TYPE(R_64) | REG_TYPE(SP_64)) \ | |
293 | /* Typecheck: any int (inc {W}SP inc [WX]ZR) */ \ | |
294 | MULTI_REG_TYPE(R_Z_SP, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
295 | | REG_TYPE(SP_32) | REG_TYPE(SP_64) \ | |
296 | | REG_TYPE(Z_32) | REG_TYPE(Z_64)) \ | |
297 | /* Typecheck: any [BHSDQ]P FP. */ \ | |
298 | MULTI_REG_TYPE(BHSDQ, REG_TYPE(FP_B) | REG_TYPE(FP_H) \ | |
299 | | REG_TYPE(FP_S) | REG_TYPE(FP_D) | REG_TYPE(FP_Q)) \ | |
300 | /* Typecheck: any int or [BHSDQ]P FP or V reg (exc SP inc [WX]ZR) */ \ | |
301 | MULTI_REG_TYPE(R_Z_BHSDQ_V, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
302 | | REG_TYPE(Z_32) | REG_TYPE(Z_64) | REG_TYPE(VN) \ | |
303 | | REG_TYPE(FP_B) | REG_TYPE(FP_H) \ | |
304 | | REG_TYPE(FP_S) | REG_TYPE(FP_D) | REG_TYPE(FP_Q)) \ | |
305 | /* Any integer register; used for error messages only. */ \ | |
306 | MULTI_REG_TYPE(R_N, REG_TYPE(R_32) | REG_TYPE(R_64) \ | |
307 | | REG_TYPE(SP_32) | REG_TYPE(SP_64) \ | |
308 | | REG_TYPE(Z_32) | REG_TYPE(Z_64)) \ | |
309 | /* Pseudo type to mark the end of the enumerator sequence. */ \ | |
310 | BASIC_REG_TYPE(MAX) | |
311 | ||
312 | #undef BASIC_REG_TYPE | |
313 | #define BASIC_REG_TYPE(T) REG_TYPE_##T, | |
314 | #undef MULTI_REG_TYPE | |
315 | #define MULTI_REG_TYPE(T,V) BASIC_REG_TYPE(T) | |
316 | ||
317 | /* Register type enumerators. */ | |
318 | typedef enum | |
319 | { | |
320 | /* A list of REG_TYPE_*. */ | |
321 | AARCH64_REG_TYPES | |
322 | } aarch64_reg_type; | |
323 | ||
324 | #undef BASIC_REG_TYPE | |
325 | #define BASIC_REG_TYPE(T) 1 << REG_TYPE_##T, | |
326 | #undef REG_TYPE | |
327 | #define REG_TYPE(T) (1 << REG_TYPE_##T) | |
328 | #undef MULTI_REG_TYPE | |
329 | #define MULTI_REG_TYPE(T,V) V, | |
330 | ||
331 | /* Values indexed by aarch64_reg_type to assist the type checking. */ | |
332 | static const unsigned reg_type_masks[] = | |
333 | { | |
334 | AARCH64_REG_TYPES | |
335 | }; | |
336 | ||
337 | #undef BASIC_REG_TYPE | |
338 | #undef REG_TYPE | |
339 | #undef MULTI_REG_TYPE | |
340 | #undef AARCH64_REG_TYPES | |
341 | ||
342 | /* Diagnostics used when we don't get a register of the expected type. | |
343 | Note: this has to synchronized with aarch64_reg_type definitions | |
344 | above. */ | |
345 | static const char * | |
346 | get_reg_expected_msg (aarch64_reg_type reg_type) | |
347 | { | |
348 | const char *msg; | |
349 | ||
350 | switch (reg_type) | |
351 | { | |
352 | case REG_TYPE_R_32: | |
353 | msg = N_("integer 32-bit register expected"); | |
354 | break; | |
355 | case REG_TYPE_R_64: | |
356 | msg = N_("integer 64-bit register expected"); | |
357 | break; | |
358 | case REG_TYPE_R_N: | |
359 | msg = N_("integer register expected"); | |
360 | break; | |
361 | case REG_TYPE_R_Z_SP: | |
362 | msg = N_("integer, zero or SP register expected"); | |
363 | break; | |
364 | case REG_TYPE_FP_B: | |
365 | msg = N_("8-bit SIMD scalar register expected"); | |
366 | break; | |
367 | case REG_TYPE_FP_H: | |
368 | msg = N_("16-bit SIMD scalar or floating-point half precision " | |
369 | "register expected"); | |
370 | break; | |
371 | case REG_TYPE_FP_S: | |
372 | msg = N_("32-bit SIMD scalar or floating-point single precision " | |
373 | "register expected"); | |
374 | break; | |
375 | case REG_TYPE_FP_D: | |
376 | msg = N_("64-bit SIMD scalar or floating-point double precision " | |
377 | "register expected"); | |
378 | break; | |
379 | case REG_TYPE_FP_Q: | |
380 | msg = N_("128-bit SIMD scalar or floating-point quad precision " | |
381 | "register expected"); | |
382 | break; | |
383 | case REG_TYPE_CN: | |
384 | msg = N_("C0 - C15 expected"); | |
385 | break; | |
386 | case REG_TYPE_R_Z_BHSDQ_V: | |
387 | msg = N_("register expected"); | |
388 | break; | |
389 | case REG_TYPE_BHSDQ: /* any [BHSDQ]P FP */ | |
390 | msg = N_("SIMD scalar or floating-point register expected"); | |
391 | break; | |
392 | case REG_TYPE_VN: /* any V reg */ | |
393 | msg = N_("vector register expected"); | |
394 | break; | |
395 | default: | |
396 | as_fatal (_("invalid register type %d"), reg_type); | |
397 | } | |
398 | return msg; | |
399 | } | |
400 | ||
401 | /* Some well known registers that we refer to directly elsewhere. */ | |
402 | #define REG_SP 31 | |
403 | ||
404 | /* Instructions take 4 bytes in the object file. */ | |
405 | #define INSN_SIZE 4 | |
406 | ||
407 | /* Define some common error messages. */ | |
408 | #define BAD_SP _("SP not allowed here") | |
409 | ||
410 | static struct hash_control *aarch64_ops_hsh; | |
411 | static struct hash_control *aarch64_cond_hsh; | |
412 | static struct hash_control *aarch64_shift_hsh; | |
413 | static struct hash_control *aarch64_sys_regs_hsh; | |
414 | static struct hash_control *aarch64_pstatefield_hsh; | |
415 | static struct hash_control *aarch64_sys_regs_ic_hsh; | |
416 | static struct hash_control *aarch64_sys_regs_dc_hsh; | |
417 | static struct hash_control *aarch64_sys_regs_at_hsh; | |
418 | static struct hash_control *aarch64_sys_regs_tlbi_hsh; | |
419 | static struct hash_control *aarch64_reg_hsh; | |
420 | static struct hash_control *aarch64_barrier_opt_hsh; | |
421 | static struct hash_control *aarch64_nzcv_hsh; | |
422 | static struct hash_control *aarch64_pldop_hsh; | |
423 | ||
424 | /* Stuff needed to resolve the label ambiguity | |
425 | As: | |
426 | ... | |
427 | label: <insn> | |
428 | may differ from: | |
429 | ... | |
430 | label: | |
431 | <insn> */ | |
432 | ||
433 | static symbolS *last_label_seen; | |
434 | ||
435 | /* Literal pool structure. Held on a per-section | |
436 | and per-sub-section basis. */ | |
437 | ||
438 | #define MAX_LITERAL_POOL_SIZE 1024 | |
439 | typedef struct literal_pool | |
440 | { | |
441 | expressionS literals[MAX_LITERAL_POOL_SIZE]; | |
442 | unsigned int next_free_entry; | |
443 | unsigned int id; | |
444 | symbolS *symbol; | |
445 | segT section; | |
446 | subsegT sub_section; | |
447 | int size; | |
448 | struct literal_pool *next; | |
449 | } literal_pool; | |
450 | ||
451 | /* Pointer to a linked list of literal pools. */ | |
452 | static literal_pool *list_of_pools = NULL; | |
453 | \f | |
454 | /* Pure syntax. */ | |
455 | ||
456 | /* This array holds the chars that always start a comment. If the | |
457 | pre-processor is disabled, these aren't very useful. */ | |
458 | const char comment_chars[] = ""; | |
459 | ||
460 | /* This array holds the chars that only start a comment at the beginning of | |
461 | a line. If the line seems to have the form '# 123 filename' | |
462 | .line and .file directives will appear in the pre-processed output. */ | |
463 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
464 | first line of the input file. This is because the compiler outputs | |
465 | #NO_APP at the beginning of its output. */ | |
466 | /* Also note that comments like this one will always work. */ | |
467 | const char line_comment_chars[] = "#"; | |
468 | ||
469 | const char line_separator_chars[] = ";"; | |
470 | ||
471 | /* Chars that can be used to separate mant | |
472 | from exp in floating point numbers. */ | |
473 | const char EXP_CHARS[] = "eE"; | |
474 | ||
475 | /* Chars that mean this number is a floating point constant. */ | |
476 | /* As in 0f12.456 */ | |
477 | /* or 0d1.2345e12 */ | |
478 | ||
479 | const char FLT_CHARS[] = "rRsSfFdDxXeEpP"; | |
480 | ||
481 | /* Prefix character that indicates the start of an immediate value. */ | |
482 | #define is_immediate_prefix(C) ((C) == '#') | |
483 | ||
484 | /* Separator character handling. */ | |
485 | ||
486 | #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0) | |
487 | ||
488 | static inline bfd_boolean | |
489 | skip_past_char (char **str, char c) | |
490 | { | |
491 | if (**str == c) | |
492 | { | |
493 | (*str)++; | |
494 | return TRUE; | |
495 | } | |
496 | else | |
497 | return FALSE; | |
498 | } | |
499 | ||
500 | #define skip_past_comma(str) skip_past_char (str, ',') | |
501 | ||
502 | /* Arithmetic expressions (possibly involving symbols). */ | |
503 | ||
a06ea964 NC |
504 | static bfd_boolean in_my_get_expression_p = FALSE; |
505 | ||
506 | /* Third argument to my_get_expression. */ | |
507 | #define GE_NO_PREFIX 0 | |
508 | #define GE_OPT_PREFIX 1 | |
509 | ||
510 | /* Return TRUE if the string pointed by *STR is successfully parsed | |
511 | as an valid expression; *EP will be filled with the information of | |
512 | such an expression. Otherwise return FALSE. */ | |
513 | ||
514 | static bfd_boolean | |
515 | my_get_expression (expressionS * ep, char **str, int prefix_mode, | |
516 | int reject_absent) | |
517 | { | |
518 | char *save_in; | |
519 | segT seg; | |
520 | int prefix_present_p = 0; | |
521 | ||
522 | switch (prefix_mode) | |
523 | { | |
524 | case GE_NO_PREFIX: | |
525 | break; | |
526 | case GE_OPT_PREFIX: | |
527 | if (is_immediate_prefix (**str)) | |
528 | { | |
529 | (*str)++; | |
530 | prefix_present_p = 1; | |
531 | } | |
532 | break; | |
533 | default: | |
534 | abort (); | |
535 | } | |
536 | ||
537 | memset (ep, 0, sizeof (expressionS)); | |
538 | ||
539 | save_in = input_line_pointer; | |
540 | input_line_pointer = *str; | |
541 | in_my_get_expression_p = TRUE; | |
542 | seg = expression (ep); | |
543 | in_my_get_expression_p = FALSE; | |
544 | ||
545 | if (ep->X_op == O_illegal || (reject_absent && ep->X_op == O_absent)) | |
546 | { | |
547 | /* We found a bad expression in md_operand(). */ | |
548 | *str = input_line_pointer; | |
549 | input_line_pointer = save_in; | |
550 | if (prefix_present_p && ! error_p ()) | |
551 | set_fatal_syntax_error (_("bad expression")); | |
552 | else | |
553 | set_first_syntax_error (_("bad expression")); | |
554 | return FALSE; | |
555 | } | |
556 | ||
557 | #ifdef OBJ_AOUT | |
558 | if (seg != absolute_section | |
559 | && seg != text_section | |
560 | && seg != data_section | |
561 | && seg != bss_section && seg != undefined_section) | |
562 | { | |
563 | set_syntax_error (_("bad segment")); | |
564 | *str = input_line_pointer; | |
565 | input_line_pointer = save_in; | |
566 | return FALSE; | |
567 | } | |
568 | #else | |
569 | (void) seg; | |
570 | #endif | |
571 | ||
a06ea964 NC |
572 | *str = input_line_pointer; |
573 | input_line_pointer = save_in; | |
574 | return TRUE; | |
575 | } | |
576 | ||
577 | /* Turn a string in input_line_pointer into a floating point constant | |
578 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
579 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
580 | returned, or NULL on OK. */ | |
581 | ||
582 | char * | |
583 | md_atof (int type, char *litP, int *sizeP) | |
584 | { | |
585 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
586 | } | |
587 | ||
588 | /* We handle all bad expressions here, so that we can report the faulty | |
589 | instruction in the error message. */ | |
590 | void | |
591 | md_operand (expressionS * exp) | |
592 | { | |
593 | if (in_my_get_expression_p) | |
594 | exp->X_op = O_illegal; | |
595 | } | |
596 | ||
597 | /* Immediate values. */ | |
598 | ||
599 | /* Errors may be set multiple times during parsing or bit encoding | |
600 | (particularly in the Neon bits), but usually the earliest error which is set | |
601 | will be the most meaningful. Avoid overwriting it with later (cascading) | |
602 | errors by calling this function. */ | |
603 | ||
604 | static void | |
605 | first_error (const char *error) | |
606 | { | |
607 | if (! error_p ()) | |
608 | set_syntax_error (error); | |
609 | } | |
610 | ||
611 | /* Similiar to first_error, but this function accepts formatted error | |
612 | message. */ | |
613 | static void | |
614 | first_error_fmt (const char *format, ...) | |
615 | { | |
616 | va_list args; | |
617 | enum | |
618 | { size = 100 }; | |
619 | /* N.B. this single buffer will not cause error messages for different | |
620 | instructions to pollute each other; this is because at the end of | |
621 | processing of each assembly line, error message if any will be | |
622 | collected by as_bad. */ | |
623 | static char buffer[size]; | |
624 | ||
625 | if (! error_p ()) | |
626 | { | |
3e0baa28 | 627 | int ret ATTRIBUTE_UNUSED; |
a06ea964 NC |
628 | va_start (args, format); |
629 | ret = vsnprintf (buffer, size, format, args); | |
630 | know (ret <= size - 1 && ret >= 0); | |
631 | va_end (args); | |
632 | set_syntax_error (buffer); | |
633 | } | |
634 | } | |
635 | ||
636 | /* Register parsing. */ | |
637 | ||
638 | /* Generic register parser which is called by other specialized | |
639 | register parsers. | |
640 | CCP points to what should be the beginning of a register name. | |
641 | If it is indeed a valid register name, advance CCP over it and | |
642 | return the reg_entry structure; otherwise return NULL. | |
643 | It does not issue diagnostics. */ | |
644 | ||
645 | static reg_entry * | |
646 | parse_reg (char **ccp) | |
647 | { | |
648 | char *start = *ccp; | |
649 | char *p; | |
650 | reg_entry *reg; | |
651 | ||
652 | #ifdef REGISTER_PREFIX | |
653 | if (*start != REGISTER_PREFIX) | |
654 | return NULL; | |
655 | start++; | |
656 | #endif | |
657 | ||
658 | p = start; | |
659 | if (!ISALPHA (*p) || !is_name_beginner (*p)) | |
660 | return NULL; | |
661 | ||
662 | do | |
663 | p++; | |
664 | while (ISALPHA (*p) || ISDIGIT (*p) || *p == '_'); | |
665 | ||
666 | reg = (reg_entry *) hash_find_n (aarch64_reg_hsh, start, p - start); | |
667 | ||
668 | if (!reg) | |
669 | return NULL; | |
670 | ||
671 | *ccp = p; | |
672 | return reg; | |
673 | } | |
674 | ||
675 | /* Return TRUE if REG->TYPE is a valid type of TYPE; otherwise | |
676 | return FALSE. */ | |
677 | static bfd_boolean | |
678 | aarch64_check_reg_type (const reg_entry *reg, aarch64_reg_type type) | |
679 | { | |
680 | if (reg->type == type) | |
681 | return TRUE; | |
682 | ||
683 | switch (type) | |
684 | { | |
685 | case REG_TYPE_R64_SP: /* 64-bit integer reg (inc SP exc XZR). */ | |
686 | case REG_TYPE_R_Z_SP: /* Integer reg (inc {X}SP inc [WX]ZR). */ | |
687 | case REG_TYPE_R_Z_BHSDQ_V: /* Any register apart from Cn. */ | |
688 | case REG_TYPE_BHSDQ: /* Any [BHSDQ]P FP or SIMD scalar register. */ | |
689 | case REG_TYPE_VN: /* Vector register. */ | |
690 | gas_assert (reg->type < REG_TYPE_MAX && type < REG_TYPE_MAX); | |
691 | return ((reg_type_masks[reg->type] & reg_type_masks[type]) | |
692 | == reg_type_masks[reg->type]); | |
693 | default: | |
694 | as_fatal ("unhandled type %d", type); | |
695 | abort (); | |
696 | } | |
697 | } | |
698 | ||
699 | /* Parse a register and return PARSE_FAIL if the register is not of type R_Z_SP. | |
700 | Return the register number otherwise. *ISREG32 is set to one if the | |
701 | register is 32-bit wide; *ISREGZERO is set to one if the register is | |
702 | of type Z_32 or Z_64. | |
703 | Note that this function does not issue any diagnostics. */ | |
704 | ||
705 | static int | |
706 | aarch64_reg_parse_32_64 (char **ccp, int reject_sp, int reject_rz, | |
707 | int *isreg32, int *isregzero) | |
708 | { | |
709 | char *str = *ccp; | |
710 | const reg_entry *reg = parse_reg (&str); | |
711 | ||
712 | if (reg == NULL) | |
713 | return PARSE_FAIL; | |
714 | ||
715 | if (! aarch64_check_reg_type (reg, REG_TYPE_R_Z_SP)) | |
716 | return PARSE_FAIL; | |
717 | ||
718 | switch (reg->type) | |
719 | { | |
720 | case REG_TYPE_SP_32: | |
721 | case REG_TYPE_SP_64: | |
722 | if (reject_sp) | |
723 | return PARSE_FAIL; | |
724 | *isreg32 = reg->type == REG_TYPE_SP_32; | |
725 | *isregzero = 0; | |
726 | break; | |
727 | case REG_TYPE_R_32: | |
728 | case REG_TYPE_R_64: | |
729 | *isreg32 = reg->type == REG_TYPE_R_32; | |
730 | *isregzero = 0; | |
731 | break; | |
732 | case REG_TYPE_Z_32: | |
733 | case REG_TYPE_Z_64: | |
734 | if (reject_rz) | |
735 | return PARSE_FAIL; | |
736 | *isreg32 = reg->type == REG_TYPE_Z_32; | |
737 | *isregzero = 1; | |
738 | break; | |
739 | default: | |
740 | return PARSE_FAIL; | |
741 | } | |
742 | ||
743 | *ccp = str; | |
744 | ||
745 | return reg->number; | |
746 | } | |
747 | ||
748 | /* Parse the qualifier of a SIMD vector register or a SIMD vector element. | |
749 | Fill in *PARSED_TYPE and return TRUE if the parsing succeeds; | |
750 | otherwise return FALSE. | |
751 | ||
752 | Accept only one occurrence of: | |
753 | 8b 16b 4h 8h 2s 4s 1d 2d | |
754 | b h s d q */ | |
755 | static bfd_boolean | |
756 | parse_neon_type_for_operand (struct neon_type_el *parsed_type, char **str) | |
757 | { | |
758 | char *ptr = *str; | |
759 | unsigned width; | |
760 | unsigned element_size; | |
761 | enum neon_el_type type; | |
762 | ||
763 | /* skip '.' */ | |
764 | ptr++; | |
765 | ||
766 | if (!ISDIGIT (*ptr)) | |
767 | { | |
768 | width = 0; | |
769 | goto elt_size; | |
770 | } | |
771 | width = strtoul (ptr, &ptr, 10); | |
772 | if (width != 1 && width != 2 && width != 4 && width != 8 && width != 16) | |
773 | { | |
774 | first_error_fmt (_("bad size %d in vector width specifier"), width); | |
775 | return FALSE; | |
776 | } | |
777 | ||
778 | elt_size: | |
779 | switch (TOLOWER (*ptr)) | |
780 | { | |
781 | case 'b': | |
782 | type = NT_b; | |
783 | element_size = 8; | |
784 | break; | |
785 | case 'h': | |
786 | type = NT_h; | |
787 | element_size = 16; | |
788 | break; | |
789 | case 's': | |
790 | type = NT_s; | |
791 | element_size = 32; | |
792 | break; | |
793 | case 'd': | |
794 | type = NT_d; | |
795 | element_size = 64; | |
796 | break; | |
797 | case 'q': | |
798 | if (width == 1) | |
799 | { | |
800 | type = NT_q; | |
801 | element_size = 128; | |
802 | break; | |
803 | } | |
804 | /* fall through. */ | |
805 | default: | |
806 | if (*ptr != '\0') | |
807 | first_error_fmt (_("unexpected character `%c' in element size"), *ptr); | |
808 | else | |
809 | first_error (_("missing element size")); | |
810 | return FALSE; | |
811 | } | |
812 | if (width != 0 && width * element_size != 64 && width * element_size != 128) | |
813 | { | |
814 | first_error_fmt (_ | |
815 | ("invalid element size %d and vector size combination %c"), | |
816 | width, *ptr); | |
817 | return FALSE; | |
818 | } | |
819 | ptr++; | |
820 | ||
821 | parsed_type->type = type; | |
822 | parsed_type->width = width; | |
823 | ||
824 | *str = ptr; | |
825 | ||
826 | return TRUE; | |
827 | } | |
828 | ||
829 | /* Parse a single type, e.g. ".8b", leading period included. | |
830 | Only applicable to Vn registers. | |
831 | ||
832 | Return TRUE on success; otherwise return FALSE. */ | |
833 | static bfd_boolean | |
834 | parse_neon_operand_type (struct neon_type_el *vectype, char **ccp) | |
835 | { | |
836 | char *str = *ccp; | |
837 | ||
838 | if (*str == '.') | |
839 | { | |
840 | if (! parse_neon_type_for_operand (vectype, &str)) | |
841 | { | |
842 | first_error (_("vector type expected")); | |
843 | return FALSE; | |
844 | } | |
845 | } | |
846 | else | |
847 | return FALSE; | |
848 | ||
849 | *ccp = str; | |
850 | ||
851 | return TRUE; | |
852 | } | |
853 | ||
854 | /* Parse a register of the type TYPE. | |
855 | ||
856 | Return PARSE_FAIL if the string pointed by *CCP is not a valid register | |
857 | name or the parsed register is not of TYPE. | |
858 | ||
859 | Otherwise return the register number, and optionally fill in the actual | |
860 | type of the register in *RTYPE when multiple alternatives were given, and | |
861 | return the register shape and element index information in *TYPEINFO. | |
862 | ||
863 | IN_REG_LIST should be set with TRUE if the caller is parsing a register | |
864 | list. */ | |
865 | ||
866 | static int | |
867 | parse_typed_reg (char **ccp, aarch64_reg_type type, aarch64_reg_type *rtype, | |
868 | struct neon_type_el *typeinfo, bfd_boolean in_reg_list) | |
869 | { | |
870 | char *str = *ccp; | |
871 | const reg_entry *reg = parse_reg (&str); | |
872 | struct neon_type_el atype; | |
873 | struct neon_type_el parsetype; | |
874 | bfd_boolean is_typed_vecreg = FALSE; | |
875 | ||
876 | atype.defined = 0; | |
877 | atype.type = NT_invtype; | |
878 | atype.width = -1; | |
879 | atype.index = 0; | |
880 | ||
881 | if (reg == NULL) | |
882 | { | |
883 | if (typeinfo) | |
884 | *typeinfo = atype; | |
885 | set_default_error (); | |
886 | return PARSE_FAIL; | |
887 | } | |
888 | ||
889 | if (! aarch64_check_reg_type (reg, type)) | |
890 | { | |
891 | DEBUG_TRACE ("reg type check failed"); | |
892 | set_default_error (); | |
893 | return PARSE_FAIL; | |
894 | } | |
895 | type = reg->type; | |
896 | ||
897 | if (type == REG_TYPE_VN | |
898 | && parse_neon_operand_type (&parsetype, &str)) | |
899 | { | |
900 | /* Register if of the form Vn.[bhsdq]. */ | |
901 | is_typed_vecreg = TRUE; | |
902 | ||
903 | if (parsetype.width == 0) | |
904 | /* Expect index. In the new scheme we cannot have | |
905 | Vn.[bhsdq] represent a scalar. Therefore any | |
906 | Vn.[bhsdq] should have an index following it. | |
907 | Except in reglists ofcourse. */ | |
908 | atype.defined |= NTA_HASINDEX; | |
909 | else | |
910 | atype.defined |= NTA_HASTYPE; | |
911 | ||
912 | atype.type = parsetype.type; | |
913 | atype.width = parsetype.width; | |
914 | } | |
915 | ||
916 | if (skip_past_char (&str, '[')) | |
917 | { | |
918 | expressionS exp; | |
919 | ||
920 | /* Reject Sn[index] syntax. */ | |
921 | if (!is_typed_vecreg) | |
922 | { | |
923 | first_error (_("this type of register can't be indexed")); | |
924 | return PARSE_FAIL; | |
925 | } | |
926 | ||
927 | if (in_reg_list == TRUE) | |
928 | { | |
929 | first_error (_("index not allowed inside register list")); | |
930 | return PARSE_FAIL; | |
931 | } | |
932 | ||
933 | atype.defined |= NTA_HASINDEX; | |
934 | ||
935 | my_get_expression (&exp, &str, GE_NO_PREFIX, 1); | |
936 | ||
937 | if (exp.X_op != O_constant) | |
938 | { | |
939 | first_error (_("constant expression required")); | |
940 | return PARSE_FAIL; | |
941 | } | |
942 | ||
943 | if (! skip_past_char (&str, ']')) | |
944 | return PARSE_FAIL; | |
945 | ||
946 | atype.index = exp.X_add_number; | |
947 | } | |
948 | else if (!in_reg_list && (atype.defined & NTA_HASINDEX) != 0) | |
949 | { | |
950 | /* Indexed vector register expected. */ | |
951 | first_error (_("indexed vector register expected")); | |
952 | return PARSE_FAIL; | |
953 | } | |
954 | ||
955 | /* A vector reg Vn should be typed or indexed. */ | |
956 | if (type == REG_TYPE_VN && atype.defined == 0) | |
957 | { | |
958 | first_error (_("invalid use of vector register")); | |
959 | } | |
960 | ||
961 | if (typeinfo) | |
962 | *typeinfo = atype; | |
963 | ||
964 | if (rtype) | |
965 | *rtype = type; | |
966 | ||
967 | *ccp = str; | |
968 | ||
969 | return reg->number; | |
970 | } | |
971 | ||
972 | /* Parse register. | |
973 | ||
974 | Return the register number on success; return PARSE_FAIL otherwise. | |
975 | ||
976 | If RTYPE is not NULL, return in *RTYPE the (possibly restricted) type of | |
977 | the register (e.g. NEON double or quad reg when either has been requested). | |
978 | ||
979 | If this is a NEON vector register with additional type information, fill | |
980 | in the struct pointed to by VECTYPE (if non-NULL). | |
981 | ||
982 | This parser does not handle register list. */ | |
983 | ||
984 | static int | |
985 | aarch64_reg_parse (char **ccp, aarch64_reg_type type, | |
986 | aarch64_reg_type *rtype, struct neon_type_el *vectype) | |
987 | { | |
988 | struct neon_type_el atype; | |
989 | char *str = *ccp; | |
990 | int reg = parse_typed_reg (&str, type, rtype, &atype, | |
991 | /*in_reg_list= */ FALSE); | |
992 | ||
993 | if (reg == PARSE_FAIL) | |
994 | return PARSE_FAIL; | |
995 | ||
996 | if (vectype) | |
997 | *vectype = atype; | |
998 | ||
999 | *ccp = str; | |
1000 | ||
1001 | return reg; | |
1002 | } | |
1003 | ||
1004 | static inline bfd_boolean | |
1005 | eq_neon_type_el (struct neon_type_el e1, struct neon_type_el e2) | |
1006 | { | |
1007 | return | |
1008 | e1.type == e2.type | |
1009 | && e1.defined == e2.defined | |
1010 | && e1.width == e2.width && e1.index == e2.index; | |
1011 | } | |
1012 | ||
1013 | /* This function parses the NEON register list. On success, it returns | |
1014 | the parsed register list information in the following encoded format: | |
1015 | ||
1016 | bit 18-22 | 13-17 | 7-11 | 2-6 | 0-1 | |
1017 | 4th regno | 3rd regno | 2nd regno | 1st regno | num_of_reg | |
1018 | ||
1019 | The information of the register shape and/or index is returned in | |
1020 | *VECTYPE. | |
1021 | ||
1022 | It returns PARSE_FAIL if the register list is invalid. | |
1023 | ||
1024 | The list contains one to four registers. | |
1025 | Each register can be one of: | |
1026 | <Vt>.<T>[<index>] | |
1027 | <Vt>.<T> | |
1028 | All <T> should be identical. | |
1029 | All <index> should be identical. | |
1030 | There are restrictions on <Vt> numbers which are checked later | |
1031 | (by reg_list_valid_p). */ | |
1032 | ||
1033 | static int | |
1034 | parse_neon_reg_list (char **ccp, struct neon_type_el *vectype) | |
1035 | { | |
1036 | char *str = *ccp; | |
1037 | int nb_regs; | |
1038 | struct neon_type_el typeinfo, typeinfo_first; | |
1039 | int val, val_range; | |
1040 | int in_range; | |
1041 | int ret_val; | |
1042 | int i; | |
1043 | bfd_boolean error = FALSE; | |
1044 | bfd_boolean expect_index = FALSE; | |
1045 | ||
1046 | if (*str != '{') | |
1047 | { | |
1048 | set_syntax_error (_("expecting {")); | |
1049 | return PARSE_FAIL; | |
1050 | } | |
1051 | str++; | |
1052 | ||
1053 | nb_regs = 0; | |
1054 | typeinfo_first.defined = 0; | |
1055 | typeinfo_first.type = NT_invtype; | |
1056 | typeinfo_first.width = -1; | |
1057 | typeinfo_first.index = 0; | |
1058 | ret_val = 0; | |
1059 | val = -1; | |
1060 | val_range = -1; | |
1061 | in_range = 0; | |
1062 | do | |
1063 | { | |
1064 | if (in_range) | |
1065 | { | |
1066 | str++; /* skip over '-' */ | |
1067 | val_range = val; | |
1068 | } | |
1069 | val = parse_typed_reg (&str, REG_TYPE_VN, NULL, &typeinfo, | |
1070 | /*in_reg_list= */ TRUE); | |
1071 | if (val == PARSE_FAIL) | |
1072 | { | |
1073 | set_first_syntax_error (_("invalid vector register in list")); | |
1074 | error = TRUE; | |
1075 | continue; | |
1076 | } | |
1077 | /* reject [bhsd]n */ | |
1078 | if (typeinfo.defined == 0) | |
1079 | { | |
1080 | set_first_syntax_error (_("invalid scalar register in list")); | |
1081 | error = TRUE; | |
1082 | continue; | |
1083 | } | |
1084 | ||
1085 | if (typeinfo.defined & NTA_HASINDEX) | |
1086 | expect_index = TRUE; | |
1087 | ||
1088 | if (in_range) | |
1089 | { | |
1090 | if (val < val_range) | |
1091 | { | |
1092 | set_first_syntax_error | |
1093 | (_("invalid range in vector register list")); | |
1094 | error = TRUE; | |
1095 | } | |
1096 | val_range++; | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | val_range = val; | |
1101 | if (nb_regs == 0) | |
1102 | typeinfo_first = typeinfo; | |
1103 | else if (! eq_neon_type_el (typeinfo_first, typeinfo)) | |
1104 | { | |
1105 | set_first_syntax_error | |
1106 | (_("type mismatch in vector register list")); | |
1107 | error = TRUE; | |
1108 | } | |
1109 | } | |
1110 | if (! error) | |
1111 | for (i = val_range; i <= val; i++) | |
1112 | { | |
1113 | ret_val |= i << (5 * nb_regs); | |
1114 | nb_regs++; | |
1115 | } | |
1116 | in_range = 0; | |
1117 | } | |
1118 | while (skip_past_comma (&str) || (in_range = 1, *str == '-')); | |
1119 | ||
1120 | skip_whitespace (str); | |
1121 | if (*str != '}') | |
1122 | { | |
1123 | set_first_syntax_error (_("end of vector register list not found")); | |
1124 | error = TRUE; | |
1125 | } | |
1126 | str++; | |
1127 | ||
1128 | skip_whitespace (str); | |
1129 | ||
1130 | if (expect_index) | |
1131 | { | |
1132 | if (skip_past_char (&str, '[')) | |
1133 | { | |
1134 | expressionS exp; | |
1135 | ||
1136 | my_get_expression (&exp, &str, GE_NO_PREFIX, 1); | |
1137 | if (exp.X_op != O_constant) | |
1138 | { | |
1139 | set_first_syntax_error (_("constant expression required.")); | |
1140 | error = TRUE; | |
1141 | } | |
1142 | if (! skip_past_char (&str, ']')) | |
1143 | error = TRUE; | |
1144 | else | |
1145 | typeinfo_first.index = exp.X_add_number; | |
1146 | } | |
1147 | else | |
1148 | { | |
1149 | set_first_syntax_error (_("expected index")); | |
1150 | error = TRUE; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if (nb_regs > 4) | |
1155 | { | |
1156 | set_first_syntax_error (_("too many registers in vector register list")); | |
1157 | error = TRUE; | |
1158 | } | |
1159 | else if (nb_regs == 0) | |
1160 | { | |
1161 | set_first_syntax_error (_("empty vector register list")); | |
1162 | error = TRUE; | |
1163 | } | |
1164 | ||
1165 | *ccp = str; | |
1166 | if (! error) | |
1167 | *vectype = typeinfo_first; | |
1168 | ||
1169 | return error ? PARSE_FAIL : (ret_val << 2) | (nb_regs - 1); | |
1170 | } | |
1171 | ||
1172 | /* Directives: register aliases. */ | |
1173 | ||
1174 | static reg_entry * | |
1175 | insert_reg_alias (char *str, int number, aarch64_reg_type type) | |
1176 | { | |
1177 | reg_entry *new; | |
1178 | const char *name; | |
1179 | ||
1180 | if ((new = hash_find (aarch64_reg_hsh, str)) != 0) | |
1181 | { | |
1182 | if (new->builtin) | |
1183 | as_warn (_("ignoring attempt to redefine built-in register '%s'"), | |
1184 | str); | |
1185 | ||
1186 | /* Only warn about a redefinition if it's not defined as the | |
1187 | same register. */ | |
1188 | else if (new->number != number || new->type != type) | |
1189 | as_warn (_("ignoring redefinition of register alias '%s'"), str); | |
1190 | ||
1191 | return NULL; | |
1192 | } | |
1193 | ||
1194 | name = xstrdup (str); | |
1195 | new = xmalloc (sizeof (reg_entry)); | |
1196 | ||
1197 | new->name = name; | |
1198 | new->number = number; | |
1199 | new->type = type; | |
1200 | new->builtin = FALSE; | |
1201 | ||
1202 | if (hash_insert (aarch64_reg_hsh, name, (void *) new)) | |
1203 | abort (); | |
1204 | ||
1205 | return new; | |
1206 | } | |
1207 | ||
1208 | /* Look for the .req directive. This is of the form: | |
1209 | ||
1210 | new_register_name .req existing_register_name | |
1211 | ||
1212 | If we find one, or if it looks sufficiently like one that we want to | |
1213 | handle any error here, return TRUE. Otherwise return FALSE. */ | |
1214 | ||
1215 | static bfd_boolean | |
1216 | create_register_alias (char *newname, char *p) | |
1217 | { | |
1218 | const reg_entry *old; | |
1219 | char *oldname, *nbuf; | |
1220 | size_t nlen; | |
1221 | ||
1222 | /* The input scrubber ensures that whitespace after the mnemonic is | |
1223 | collapsed to single spaces. */ | |
1224 | oldname = p; | |
1225 | if (strncmp (oldname, " .req ", 6) != 0) | |
1226 | return FALSE; | |
1227 | ||
1228 | oldname += 6; | |
1229 | if (*oldname == '\0') | |
1230 | return FALSE; | |
1231 | ||
1232 | old = hash_find (aarch64_reg_hsh, oldname); | |
1233 | if (!old) | |
1234 | { | |
1235 | as_warn (_("unknown register '%s' -- .req ignored"), oldname); | |
1236 | return TRUE; | |
1237 | } | |
1238 | ||
1239 | /* If TC_CASE_SENSITIVE is defined, then newname already points to | |
1240 | the desired alias name, and p points to its end. If not, then | |
1241 | the desired alias name is in the global original_case_string. */ | |
1242 | #ifdef TC_CASE_SENSITIVE | |
1243 | nlen = p - newname; | |
1244 | #else | |
1245 | newname = original_case_string; | |
1246 | nlen = strlen (newname); | |
1247 | #endif | |
1248 | ||
1249 | nbuf = alloca (nlen + 1); | |
1250 | memcpy (nbuf, newname, nlen); | |
1251 | nbuf[nlen] = '\0'; | |
1252 | ||
1253 | /* Create aliases under the new name as stated; an all-lowercase | |
1254 | version of the new name; and an all-uppercase version of the new | |
1255 | name. */ | |
1256 | if (insert_reg_alias (nbuf, old->number, old->type) != NULL) | |
1257 | { | |
1258 | for (p = nbuf; *p; p++) | |
1259 | *p = TOUPPER (*p); | |
1260 | ||
1261 | if (strncmp (nbuf, newname, nlen)) | |
1262 | { | |
1263 | /* If this attempt to create an additional alias fails, do not bother | |
1264 | trying to create the all-lower case alias. We will fail and issue | |
1265 | a second, duplicate error message. This situation arises when the | |
1266 | programmer does something like: | |
1267 | foo .req r0 | |
1268 | Foo .req r1 | |
1269 | The second .req creates the "Foo" alias but then fails to create | |
1270 | the artificial FOO alias because it has already been created by the | |
1271 | first .req. */ | |
1272 | if (insert_reg_alias (nbuf, old->number, old->type) == NULL) | |
1273 | return TRUE; | |
1274 | } | |
1275 | ||
1276 | for (p = nbuf; *p; p++) | |
1277 | *p = TOLOWER (*p); | |
1278 | ||
1279 | if (strncmp (nbuf, newname, nlen)) | |
1280 | insert_reg_alias (nbuf, old->number, old->type); | |
1281 | } | |
1282 | ||
1283 | return TRUE; | |
1284 | } | |
1285 | ||
1286 | /* Should never be called, as .req goes between the alias and the | |
1287 | register name, not at the beginning of the line. */ | |
1288 | static void | |
1289 | s_req (int a ATTRIBUTE_UNUSED) | |
1290 | { | |
1291 | as_bad (_("invalid syntax for .req directive")); | |
1292 | } | |
1293 | ||
1294 | /* The .unreq directive deletes an alias which was previously defined | |
1295 | by .req. For example: | |
1296 | ||
1297 | my_alias .req r11 | |
1298 | .unreq my_alias */ | |
1299 | ||
1300 | static void | |
1301 | s_unreq (int a ATTRIBUTE_UNUSED) | |
1302 | { | |
1303 | char *name; | |
1304 | char saved_char; | |
1305 | ||
1306 | name = input_line_pointer; | |
1307 | ||
1308 | while (*input_line_pointer != 0 | |
1309 | && *input_line_pointer != ' ' && *input_line_pointer != '\n') | |
1310 | ++input_line_pointer; | |
1311 | ||
1312 | saved_char = *input_line_pointer; | |
1313 | *input_line_pointer = 0; | |
1314 | ||
1315 | if (!*name) | |
1316 | as_bad (_("invalid syntax for .unreq directive")); | |
1317 | else | |
1318 | { | |
1319 | reg_entry *reg = hash_find (aarch64_reg_hsh, name); | |
1320 | ||
1321 | if (!reg) | |
1322 | as_bad (_("unknown register alias '%s'"), name); | |
1323 | else if (reg->builtin) | |
1324 | as_warn (_("ignoring attempt to undefine built-in register '%s'"), | |
1325 | name); | |
1326 | else | |
1327 | { | |
1328 | char *p; | |
1329 | char *nbuf; | |
1330 | ||
1331 | hash_delete (aarch64_reg_hsh, name, FALSE); | |
1332 | free ((char *) reg->name); | |
1333 | free (reg); | |
1334 | ||
1335 | /* Also locate the all upper case and all lower case versions. | |
1336 | Do not complain if we cannot find one or the other as it | |
1337 | was probably deleted above. */ | |
1338 | ||
1339 | nbuf = strdup (name); | |
1340 | for (p = nbuf; *p; p++) | |
1341 | *p = TOUPPER (*p); | |
1342 | reg = hash_find (aarch64_reg_hsh, nbuf); | |
1343 | if (reg) | |
1344 | { | |
1345 | hash_delete (aarch64_reg_hsh, nbuf, FALSE); | |
1346 | free ((char *) reg->name); | |
1347 | free (reg); | |
1348 | } | |
1349 | ||
1350 | for (p = nbuf; *p; p++) | |
1351 | *p = TOLOWER (*p); | |
1352 | reg = hash_find (aarch64_reg_hsh, nbuf); | |
1353 | if (reg) | |
1354 | { | |
1355 | hash_delete (aarch64_reg_hsh, nbuf, FALSE); | |
1356 | free ((char *) reg->name); | |
1357 | free (reg); | |
1358 | } | |
1359 | ||
1360 | free (nbuf); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | *input_line_pointer = saved_char; | |
1365 | demand_empty_rest_of_line (); | |
1366 | } | |
1367 | ||
1368 | /* Directives: Instruction set selection. */ | |
1369 | ||
1370 | #ifdef OBJ_ELF | |
1371 | /* This code is to handle mapping symbols as defined in the ARM AArch64 ELF | |
1372 | spec. (See "Mapping symbols", section 4.5.4, ARM AAELF64 version 0.05). | |
1373 | Note that previously, $a and $t has type STT_FUNC (BSF_OBJECT flag), | |
1374 | and $d has type STT_OBJECT (BSF_OBJECT flag). Now all three are untyped. */ | |
1375 | ||
1376 | /* Create a new mapping symbol for the transition to STATE. */ | |
1377 | ||
1378 | static void | |
1379 | make_mapping_symbol (enum mstate state, valueT value, fragS * frag) | |
1380 | { | |
1381 | symbolS *symbolP; | |
1382 | const char *symname; | |
1383 | int type; | |
1384 | ||
1385 | switch (state) | |
1386 | { | |
1387 | case MAP_DATA: | |
1388 | symname = "$d"; | |
1389 | type = BSF_NO_FLAGS; | |
1390 | break; | |
1391 | case MAP_INSN: | |
1392 | symname = "$x"; | |
1393 | type = BSF_NO_FLAGS; | |
1394 | break; | |
1395 | default: | |
1396 | abort (); | |
1397 | } | |
1398 | ||
1399 | symbolP = symbol_new (symname, now_seg, value, frag); | |
1400 | symbol_get_bfdsym (symbolP)->flags |= type | BSF_LOCAL; | |
1401 | ||
1402 | /* Save the mapping symbols for future reference. Also check that | |
1403 | we do not place two mapping symbols at the same offset within a | |
1404 | frag. We'll handle overlap between frags in | |
1405 | check_mapping_symbols. | |
1406 | ||
1407 | If .fill or other data filling directive generates zero sized data, | |
1408 | the mapping symbol for the following code will have the same value | |
1409 | as the one generated for the data filling directive. In this case, | |
1410 | we replace the old symbol with the new one at the same address. */ | |
1411 | if (value == 0) | |
1412 | { | |
1413 | if (frag->tc_frag_data.first_map != NULL) | |
1414 | { | |
1415 | know (S_GET_VALUE (frag->tc_frag_data.first_map) == 0); | |
1416 | symbol_remove (frag->tc_frag_data.first_map, &symbol_rootP, | |
1417 | &symbol_lastP); | |
1418 | } | |
1419 | frag->tc_frag_data.first_map = symbolP; | |
1420 | } | |
1421 | if (frag->tc_frag_data.last_map != NULL) | |
1422 | { | |
1423 | know (S_GET_VALUE (frag->tc_frag_data.last_map) <= | |
1424 | S_GET_VALUE (symbolP)); | |
1425 | if (S_GET_VALUE (frag->tc_frag_data.last_map) == S_GET_VALUE (symbolP)) | |
1426 | symbol_remove (frag->tc_frag_data.last_map, &symbol_rootP, | |
1427 | &symbol_lastP); | |
1428 | } | |
1429 | frag->tc_frag_data.last_map = symbolP; | |
1430 | } | |
1431 | ||
1432 | /* We must sometimes convert a region marked as code to data during | |
1433 | code alignment, if an odd number of bytes have to be padded. The | |
1434 | code mapping symbol is pushed to an aligned address. */ | |
1435 | ||
1436 | static void | |
1437 | insert_data_mapping_symbol (enum mstate state, | |
1438 | valueT value, fragS * frag, offsetT bytes) | |
1439 | { | |
1440 | /* If there was already a mapping symbol, remove it. */ | |
1441 | if (frag->tc_frag_data.last_map != NULL | |
1442 | && S_GET_VALUE (frag->tc_frag_data.last_map) == | |
1443 | frag->fr_address + value) | |
1444 | { | |
1445 | symbolS *symp = frag->tc_frag_data.last_map; | |
1446 | ||
1447 | if (value == 0) | |
1448 | { | |
1449 | know (frag->tc_frag_data.first_map == symp); | |
1450 | frag->tc_frag_data.first_map = NULL; | |
1451 | } | |
1452 | frag->tc_frag_data.last_map = NULL; | |
1453 | symbol_remove (symp, &symbol_rootP, &symbol_lastP); | |
1454 | } | |
1455 | ||
1456 | make_mapping_symbol (MAP_DATA, value, frag); | |
1457 | make_mapping_symbol (state, value + bytes, frag); | |
1458 | } | |
1459 | ||
1460 | static void mapping_state_2 (enum mstate state, int max_chars); | |
1461 | ||
1462 | /* Set the mapping state to STATE. Only call this when about to | |
1463 | emit some STATE bytes to the file. */ | |
1464 | ||
1465 | void | |
1466 | mapping_state (enum mstate state) | |
1467 | { | |
1468 | enum mstate mapstate = seg_info (now_seg)->tc_segment_info_data.mapstate; | |
1469 | ||
1470 | #define TRANSITION(from, to) (mapstate == (from) && state == (to)) | |
1471 | ||
1472 | if (mapstate == state) | |
1473 | /* The mapping symbol has already been emitted. | |
1474 | There is nothing else to do. */ | |
1475 | return; | |
1476 | else if (TRANSITION (MAP_UNDEFINED, MAP_DATA)) | |
1477 | /* This case will be evaluated later in the next else. */ | |
1478 | return; | |
1479 | else if (TRANSITION (MAP_UNDEFINED, MAP_INSN)) | |
1480 | { | |
1481 | /* Only add the symbol if the offset is > 0: | |
1482 | if we're at the first frag, check it's size > 0; | |
1483 | if we're not at the first frag, then for sure | |
1484 | the offset is > 0. */ | |
1485 | struct frag *const frag_first = seg_info (now_seg)->frchainP->frch_root; | |
1486 | const int add_symbol = (frag_now != frag_first) | |
1487 | || (frag_now_fix () > 0); | |
1488 | ||
1489 | if (add_symbol) | |
1490 | make_mapping_symbol (MAP_DATA, (valueT) 0, frag_first); | |
1491 | } | |
1492 | ||
1493 | mapping_state_2 (state, 0); | |
1494 | #undef TRANSITION | |
1495 | } | |
1496 | ||
1497 | /* Same as mapping_state, but MAX_CHARS bytes have already been | |
1498 | allocated. Put the mapping symbol that far back. */ | |
1499 | ||
1500 | static void | |
1501 | mapping_state_2 (enum mstate state, int max_chars) | |
1502 | { | |
1503 | enum mstate mapstate = seg_info (now_seg)->tc_segment_info_data.mapstate; | |
1504 | ||
1505 | if (!SEG_NORMAL (now_seg)) | |
1506 | return; | |
1507 | ||
1508 | if (mapstate == state) | |
1509 | /* The mapping symbol has already been emitted. | |
1510 | There is nothing else to do. */ | |
1511 | return; | |
1512 | ||
1513 | seg_info (now_seg)->tc_segment_info_data.mapstate = state; | |
1514 | make_mapping_symbol (state, (valueT) frag_now_fix () - max_chars, frag_now); | |
1515 | } | |
1516 | #else | |
1517 | #define mapping_state(x) /* nothing */ | |
1518 | #define mapping_state_2(x, y) /* nothing */ | |
1519 | #endif | |
1520 | ||
1521 | /* Directives: sectioning and alignment. */ | |
1522 | ||
1523 | static void | |
1524 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
1525 | { | |
1526 | /* We don't support putting frags in the BSS segment, we fake it by | |
1527 | marking in_bss, then looking at s_skip for clues. */ | |
1528 | subseg_set (bss_section, 0); | |
1529 | demand_empty_rest_of_line (); | |
1530 | mapping_state (MAP_DATA); | |
1531 | } | |
1532 | ||
1533 | static void | |
1534 | s_even (int ignore ATTRIBUTE_UNUSED) | |
1535 | { | |
1536 | /* Never make frag if expect extra pass. */ | |
1537 | if (!need_pass_2) | |
1538 | frag_align (1, 0, 0); | |
1539 | ||
1540 | record_alignment (now_seg, 1); | |
1541 | ||
1542 | demand_empty_rest_of_line (); | |
1543 | } | |
1544 | ||
1545 | /* Directives: Literal pools. */ | |
1546 | ||
1547 | static literal_pool * | |
1548 | find_literal_pool (int size) | |
1549 | { | |
1550 | literal_pool *pool; | |
1551 | ||
1552 | for (pool = list_of_pools; pool != NULL; pool = pool->next) | |
1553 | { | |
1554 | if (pool->section == now_seg | |
1555 | && pool->sub_section == now_subseg && pool->size == size) | |
1556 | break; | |
1557 | } | |
1558 | ||
1559 | return pool; | |
1560 | } | |
1561 | ||
1562 | static literal_pool * | |
1563 | find_or_make_literal_pool (int size) | |
1564 | { | |
1565 | /* Next literal pool ID number. */ | |
1566 | static unsigned int latest_pool_num = 1; | |
1567 | literal_pool *pool; | |
1568 | ||
1569 | pool = find_literal_pool (size); | |
1570 | ||
1571 | if (pool == NULL) | |
1572 | { | |
1573 | /* Create a new pool. */ | |
1574 | pool = xmalloc (sizeof (*pool)); | |
1575 | if (!pool) | |
1576 | return NULL; | |
1577 | ||
1578 | /* Currently we always put the literal pool in the current text | |
1579 | section. If we were generating "small" model code where we | |
1580 | knew that all code and initialised data was within 1MB then | |
1581 | we could output literals to mergeable, read-only data | |
1582 | sections. */ | |
1583 | ||
1584 | pool->next_free_entry = 0; | |
1585 | pool->section = now_seg; | |
1586 | pool->sub_section = now_subseg; | |
1587 | pool->size = size; | |
1588 | pool->next = list_of_pools; | |
1589 | pool->symbol = NULL; | |
1590 | ||
1591 | /* Add it to the list. */ | |
1592 | list_of_pools = pool; | |
1593 | } | |
1594 | ||
1595 | /* New pools, and emptied pools, will have a NULL symbol. */ | |
1596 | if (pool->symbol == NULL) | |
1597 | { | |
1598 | pool->symbol = symbol_create (FAKE_LABEL_NAME, undefined_section, | |
1599 | (valueT) 0, &zero_address_frag); | |
1600 | pool->id = latest_pool_num++; | |
1601 | } | |
1602 | ||
1603 | /* Done. */ | |
1604 | return pool; | |
1605 | } | |
1606 | ||
1607 | /* Add the literal of size SIZE in *EXP to the relevant literal pool. | |
1608 | Return TRUE on success, otherwise return FALSE. */ | |
1609 | static bfd_boolean | |
1610 | add_to_lit_pool (expressionS *exp, int size) | |
1611 | { | |
1612 | literal_pool *pool; | |
1613 | unsigned int entry; | |
1614 | ||
1615 | pool = find_or_make_literal_pool (size); | |
1616 | ||
1617 | /* Check if this literal value is already in the pool. */ | |
1618 | for (entry = 0; entry < pool->next_free_entry; entry++) | |
1619 | { | |
1620 | if ((pool->literals[entry].X_op == exp->X_op) | |
1621 | && (exp->X_op == O_constant) | |
1622 | && (pool->literals[entry].X_add_number == exp->X_add_number) | |
1623 | && (pool->literals[entry].X_unsigned == exp->X_unsigned)) | |
1624 | break; | |
1625 | ||
1626 | if ((pool->literals[entry].X_op == exp->X_op) | |
1627 | && (exp->X_op == O_symbol) | |
1628 | && (pool->literals[entry].X_add_number == exp->X_add_number) | |
1629 | && (pool->literals[entry].X_add_symbol == exp->X_add_symbol) | |
1630 | && (pool->literals[entry].X_op_symbol == exp->X_op_symbol)) | |
1631 | break; | |
1632 | } | |
1633 | ||
1634 | /* Do we need to create a new entry? */ | |
1635 | if (entry == pool->next_free_entry) | |
1636 | { | |
1637 | if (entry >= MAX_LITERAL_POOL_SIZE) | |
1638 | { | |
1639 | set_syntax_error (_("literal pool overflow")); | |
1640 | return FALSE; | |
1641 | } | |
1642 | ||
1643 | pool->literals[entry] = *exp; | |
1644 | pool->next_free_entry += 1; | |
1645 | } | |
1646 | ||
1647 | exp->X_op = O_symbol; | |
1648 | exp->X_add_number = ((int) entry) * size; | |
1649 | exp->X_add_symbol = pool->symbol; | |
1650 | ||
1651 | return TRUE; | |
1652 | } | |
1653 | ||
1654 | /* Can't use symbol_new here, so have to create a symbol and then at | |
1655 | a later date assign it a value. Thats what these functions do. */ | |
1656 | ||
1657 | static void | |
1658 | symbol_locate (symbolS * symbolP, | |
1659 | const char *name,/* It is copied, the caller can modify. */ | |
1660 | segT segment, /* Segment identifier (SEG_<something>). */ | |
1661 | valueT valu, /* Symbol value. */ | |
1662 | fragS * frag) /* Associated fragment. */ | |
1663 | { | |
1664 | unsigned int name_length; | |
1665 | char *preserved_copy_of_name; | |
1666 | ||
1667 | name_length = strlen (name) + 1; /* +1 for \0. */ | |
1668 | obstack_grow (¬es, name, name_length); | |
1669 | preserved_copy_of_name = obstack_finish (¬es); | |
1670 | ||
1671 | #ifdef tc_canonicalize_symbol_name | |
1672 | preserved_copy_of_name = | |
1673 | tc_canonicalize_symbol_name (preserved_copy_of_name); | |
1674 | #endif | |
1675 | ||
1676 | S_SET_NAME (symbolP, preserved_copy_of_name); | |
1677 | ||
1678 | S_SET_SEGMENT (symbolP, segment); | |
1679 | S_SET_VALUE (symbolP, valu); | |
1680 | symbol_clear_list_pointers (symbolP); | |
1681 | ||
1682 | symbol_set_frag (symbolP, frag); | |
1683 | ||
1684 | /* Link to end of symbol chain. */ | |
1685 | { | |
1686 | extern int symbol_table_frozen; | |
1687 | ||
1688 | if (symbol_table_frozen) | |
1689 | abort (); | |
1690 | } | |
1691 | ||
1692 | symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); | |
1693 | ||
1694 | obj_symbol_new_hook (symbolP); | |
1695 | ||
1696 | #ifdef tc_symbol_new_hook | |
1697 | tc_symbol_new_hook (symbolP); | |
1698 | #endif | |
1699 | ||
1700 | #ifdef DEBUG_SYMS | |
1701 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
1702 | #endif /* DEBUG_SYMS */ | |
1703 | } | |
1704 | ||
1705 | ||
1706 | static void | |
1707 | s_ltorg (int ignored ATTRIBUTE_UNUSED) | |
1708 | { | |
1709 | unsigned int entry; | |
1710 | literal_pool *pool; | |
1711 | char sym_name[20]; | |
1712 | int align; | |
1713 | ||
67a32447 | 1714 | for (align = 2; align <= 4; align++) |
a06ea964 NC |
1715 | { |
1716 | int size = 1 << align; | |
1717 | ||
1718 | pool = find_literal_pool (size); | |
1719 | if (pool == NULL || pool->symbol == NULL || pool->next_free_entry == 0) | |
1720 | continue; | |
1721 | ||
1722 | mapping_state (MAP_DATA); | |
1723 | ||
1724 | /* Align pool as you have word accesses. | |
1725 | Only make a frag if we have to. */ | |
1726 | if (!need_pass_2) | |
1727 | frag_align (align, 0, 0); | |
1728 | ||
1729 | record_alignment (now_seg, align); | |
1730 | ||
1731 | sprintf (sym_name, "$$lit_\002%x", pool->id); | |
1732 | ||
1733 | symbol_locate (pool->symbol, sym_name, now_seg, | |
1734 | (valueT) frag_now_fix (), frag_now); | |
1735 | symbol_table_insert (pool->symbol); | |
1736 | ||
1737 | for (entry = 0; entry < pool->next_free_entry; entry++) | |
1738 | /* First output the expression in the instruction to the pool. */ | |
1739 | emit_expr (&(pool->literals[entry]), size); /* .word|.xword */ | |
1740 | ||
1741 | /* Mark the pool as empty. */ | |
1742 | pool->next_free_entry = 0; | |
1743 | pool->symbol = NULL; | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | #ifdef OBJ_ELF | |
1748 | /* Forward declarations for functions below, in the MD interface | |
1749 | section. */ | |
1750 | static fixS *fix_new_aarch64 (fragS *, int, short, expressionS *, int, int); | |
1751 | static struct reloc_table_entry * find_reloc_table_entry (char **); | |
1752 | ||
1753 | /* Directives: Data. */ | |
1754 | /* N.B. the support for relocation suffix in this directive needs to be | |
1755 | implemented properly. */ | |
1756 | ||
1757 | static void | |
1758 | s_aarch64_elf_cons (int nbytes) | |
1759 | { | |
1760 | expressionS exp; | |
1761 | ||
1762 | #ifdef md_flush_pending_output | |
1763 | md_flush_pending_output (); | |
1764 | #endif | |
1765 | ||
1766 | if (is_it_end_of_statement ()) | |
1767 | { | |
1768 | demand_empty_rest_of_line (); | |
1769 | return; | |
1770 | } | |
1771 | ||
1772 | #ifdef md_cons_align | |
1773 | md_cons_align (nbytes); | |
1774 | #endif | |
1775 | ||
1776 | mapping_state (MAP_DATA); | |
1777 | do | |
1778 | { | |
1779 | struct reloc_table_entry *reloc; | |
1780 | ||
1781 | expression (&exp); | |
1782 | ||
1783 | if (exp.X_op != O_symbol) | |
1784 | emit_expr (&exp, (unsigned int) nbytes); | |
1785 | else | |
1786 | { | |
1787 | skip_past_char (&input_line_pointer, '#'); | |
1788 | if (skip_past_char (&input_line_pointer, ':')) | |
1789 | { | |
1790 | reloc = find_reloc_table_entry (&input_line_pointer); | |
1791 | if (reloc == NULL) | |
1792 | as_bad (_("unrecognized relocation suffix")); | |
1793 | else | |
1794 | as_bad (_("unimplemented relocation suffix")); | |
1795 | ignore_rest_of_line (); | |
1796 | return; | |
1797 | } | |
1798 | else | |
1799 | emit_expr (&exp, (unsigned int) nbytes); | |
1800 | } | |
1801 | } | |
1802 | while (*input_line_pointer++ == ','); | |
1803 | ||
1804 | /* Put terminator back into stream. */ | |
1805 | input_line_pointer--; | |
1806 | demand_empty_rest_of_line (); | |
1807 | } | |
1808 | ||
1809 | #endif /* OBJ_ELF */ | |
1810 | ||
1811 | /* Output a 32-bit word, but mark as an instruction. */ | |
1812 | ||
1813 | static void | |
1814 | s_aarch64_inst (int ignored ATTRIBUTE_UNUSED) | |
1815 | { | |
1816 | expressionS exp; | |
1817 | ||
1818 | #ifdef md_flush_pending_output | |
1819 | md_flush_pending_output (); | |
1820 | #endif | |
1821 | ||
1822 | if (is_it_end_of_statement ()) | |
1823 | { | |
1824 | demand_empty_rest_of_line (); | |
1825 | return; | |
1826 | } | |
1827 | ||
1828 | if (!need_pass_2) | |
1829 | frag_align_code (2, 0); | |
1830 | #ifdef OBJ_ELF | |
1831 | mapping_state (MAP_INSN); | |
1832 | #endif | |
1833 | ||
1834 | do | |
1835 | { | |
1836 | expression (&exp); | |
1837 | if (exp.X_op != O_constant) | |
1838 | { | |
1839 | as_bad (_("constant expression required")); | |
1840 | ignore_rest_of_line (); | |
1841 | return; | |
1842 | } | |
1843 | ||
1844 | if (target_big_endian) | |
1845 | { | |
1846 | unsigned int val = exp.X_add_number; | |
1847 | exp.X_add_number = SWAP_32 (val); | |
1848 | } | |
1849 | emit_expr (&exp, 4); | |
1850 | } | |
1851 | while (*input_line_pointer++ == ','); | |
1852 | ||
1853 | /* Put terminator back into stream. */ | |
1854 | input_line_pointer--; | |
1855 | demand_empty_rest_of_line (); | |
1856 | } | |
1857 | ||
1858 | #ifdef OBJ_ELF | |
1859 | /* Emit BFD_RELOC_AARCH64_TLSDESC_CALL on the next BLR instruction. */ | |
1860 | ||
1861 | static void | |
1862 | s_tlsdesccall (int ignored ATTRIBUTE_UNUSED) | |
1863 | { | |
1864 | expressionS exp; | |
1865 | ||
1866 | /* Since we're just labelling the code, there's no need to define a | |
1867 | mapping symbol. */ | |
1868 | expression (&exp); | |
1869 | /* Make sure there is enough room in this frag for the following | |
1870 | blr. This trick only works if the blr follows immediately after | |
1871 | the .tlsdesc directive. */ | |
1872 | frag_grow (4); | |
1873 | fix_new_aarch64 (frag_now, frag_more (0) - frag_now->fr_literal, 4, &exp, 0, | |
1874 | BFD_RELOC_AARCH64_TLSDESC_CALL); | |
1875 | ||
1876 | demand_empty_rest_of_line (); | |
1877 | } | |
1878 | #endif /* OBJ_ELF */ | |
1879 | ||
1880 | static void s_aarch64_arch (int); | |
1881 | static void s_aarch64_cpu (int); | |
1882 | ||
1883 | /* This table describes all the machine specific pseudo-ops the assembler | |
1884 | has to support. The fields are: | |
1885 | pseudo-op name without dot | |
1886 | function to call to execute this pseudo-op | |
1887 | Integer arg to pass to the function. */ | |
1888 | ||
1889 | const pseudo_typeS md_pseudo_table[] = { | |
1890 | /* Never called because '.req' does not start a line. */ | |
1891 | {"req", s_req, 0}, | |
1892 | {"unreq", s_unreq, 0}, | |
1893 | {"bss", s_bss, 0}, | |
1894 | {"even", s_even, 0}, | |
1895 | {"ltorg", s_ltorg, 0}, | |
1896 | {"pool", s_ltorg, 0}, | |
1897 | {"cpu", s_aarch64_cpu, 0}, | |
1898 | {"arch", s_aarch64_arch, 0}, | |
1899 | {"inst", s_aarch64_inst, 0}, | |
1900 | #ifdef OBJ_ELF | |
1901 | {"tlsdesccall", s_tlsdesccall, 0}, | |
1902 | {"word", s_aarch64_elf_cons, 4}, | |
1903 | {"long", s_aarch64_elf_cons, 4}, | |
1904 | {"xword", s_aarch64_elf_cons, 8}, | |
1905 | {"dword", s_aarch64_elf_cons, 8}, | |
1906 | #endif | |
1907 | {0, 0, 0} | |
1908 | }; | |
1909 | \f | |
1910 | ||
1911 | /* Check whether STR points to a register name followed by a comma or the | |
1912 | end of line; REG_TYPE indicates which register types are checked | |
1913 | against. Return TRUE if STR is such a register name; otherwise return | |
1914 | FALSE. The function does not intend to produce any diagnostics, but since | |
1915 | the register parser aarch64_reg_parse, which is called by this function, | |
1916 | does produce diagnostics, we call clear_error to clear any diagnostics | |
1917 | that may be generated by aarch64_reg_parse. | |
1918 | Also, the function returns FALSE directly if there is any user error | |
1919 | present at the function entry. This prevents the existing diagnostics | |
1920 | state from being spoiled. | |
1921 | The function currently serves parse_constant_immediate and | |
1922 | parse_big_immediate only. */ | |
1923 | static bfd_boolean | |
1924 | reg_name_p (char *str, aarch64_reg_type reg_type) | |
1925 | { | |
1926 | int reg; | |
1927 | ||
1928 | /* Prevent the diagnostics state from being spoiled. */ | |
1929 | if (error_p ()) | |
1930 | return FALSE; | |
1931 | ||
1932 | reg = aarch64_reg_parse (&str, reg_type, NULL, NULL); | |
1933 | ||
1934 | /* Clear the parsing error that may be set by the reg parser. */ | |
1935 | clear_error (); | |
1936 | ||
1937 | if (reg == PARSE_FAIL) | |
1938 | return FALSE; | |
1939 | ||
1940 | skip_whitespace (str); | |
1941 | if (*str == ',' || is_end_of_line[(unsigned int) *str]) | |
1942 | return TRUE; | |
1943 | ||
1944 | return FALSE; | |
1945 | } | |
1946 | ||
1947 | /* Parser functions used exclusively in instruction operands. */ | |
1948 | ||
1949 | /* Parse an immediate expression which may not be constant. | |
1950 | ||
1951 | To prevent the expression parser from pushing a register name | |
1952 | into the symbol table as an undefined symbol, firstly a check is | |
1953 | done to find out whether STR is a valid register name followed | |
1954 | by a comma or the end of line. Return FALSE if STR is such a | |
1955 | string. */ | |
1956 | ||
1957 | static bfd_boolean | |
1958 | parse_immediate_expression (char **str, expressionS *exp) | |
1959 | { | |
1960 | if (reg_name_p (*str, REG_TYPE_R_Z_BHSDQ_V)) | |
1961 | { | |
1962 | set_recoverable_error (_("immediate operand required")); | |
1963 | return FALSE; | |
1964 | } | |
1965 | ||
1966 | my_get_expression (exp, str, GE_OPT_PREFIX, 1); | |
1967 | ||
1968 | if (exp->X_op == O_absent) | |
1969 | { | |
1970 | set_fatal_syntax_error (_("missing immediate expression")); | |
1971 | return FALSE; | |
1972 | } | |
1973 | ||
1974 | return TRUE; | |
1975 | } | |
1976 | ||
1977 | /* Constant immediate-value read function for use in insn parsing. | |
1978 | STR points to the beginning of the immediate (with the optional | |
1979 | leading #); *VAL receives the value. | |
1980 | ||
1981 | Return TRUE on success; otherwise return FALSE. */ | |
1982 | ||
1983 | static bfd_boolean | |
1984 | parse_constant_immediate (char **str, int64_t * val) | |
1985 | { | |
1986 | expressionS exp; | |
1987 | ||
1988 | if (! parse_immediate_expression (str, &exp)) | |
1989 | return FALSE; | |
1990 | ||
1991 | if (exp.X_op != O_constant) | |
1992 | { | |
1993 | set_syntax_error (_("constant expression required")); | |
1994 | return FALSE; | |
1995 | } | |
1996 | ||
1997 | *val = exp.X_add_number; | |
1998 | return TRUE; | |
1999 | } | |
2000 | ||
2001 | static uint32_t | |
2002 | encode_imm_float_bits (uint32_t imm) | |
2003 | { | |
2004 | return ((imm >> 19) & 0x7f) /* b[25:19] -> b[6:0] */ | |
2005 | | ((imm >> (31 - 7)) & 0x80); /* b[31] -> b[7] */ | |
2006 | } | |
2007 | ||
62b0d0d5 YZ |
2008 | /* Return TRUE if the single-precision floating-point value encoded in IMM |
2009 | can be expressed in the AArch64 8-bit signed floating-point format with | |
2010 | 3-bit exponent and normalized 4 bits of precision; in other words, the | |
2011 | floating-point value must be expressable as | |
2012 | (+/-) n / 16 * power (2, r) | |
2013 | where n and r are integers such that 16 <= n <=31 and -3 <= r <= 4. */ | |
2014 | ||
a06ea964 NC |
2015 | static bfd_boolean |
2016 | aarch64_imm_float_p (uint32_t imm) | |
2017 | { | |
62b0d0d5 YZ |
2018 | /* If a single-precision floating-point value has the following bit |
2019 | pattern, it can be expressed in the AArch64 8-bit floating-point | |
2020 | format: | |
2021 | ||
2022 | 3 32222222 2221111111111 | |
a06ea964 | 2023 | 1 09876543 21098765432109876543210 |
62b0d0d5 YZ |
2024 | n Eeeeeexx xxxx0000000000000000000 |
2025 | ||
2026 | where n, e and each x are either 0 or 1 independently, with | |
2027 | E == ~ e. */ | |
a06ea964 | 2028 | |
62b0d0d5 YZ |
2029 | uint32_t pattern; |
2030 | ||
2031 | /* Prepare the pattern for 'Eeeeee'. */ | |
2032 | if (((imm >> 30) & 0x1) == 0) | |
2033 | pattern = 0x3e000000; | |
a06ea964 | 2034 | else |
62b0d0d5 YZ |
2035 | pattern = 0x40000000; |
2036 | ||
2037 | return (imm & 0x7ffff) == 0 /* lower 19 bits are 0. */ | |
2038 | && ((imm & 0x7e000000) == pattern); /* bits 25 - 29 == ~ bit 30. */ | |
a06ea964 NC |
2039 | } |
2040 | ||
62b0d0d5 YZ |
2041 | /* Like aarch64_imm_float_p but for a double-precision floating-point value. |
2042 | ||
2043 | Return TRUE if the value encoded in IMM can be expressed in the AArch64 | |
2044 | 8-bit signed floating-point format with 3-bit exponent and normalized 4 | |
2045 | bits of precision (i.e. can be used in an FMOV instruction); return the | |
2046 | equivalent single-precision encoding in *FPWORD. | |
2047 | ||
2048 | Otherwise return FALSE. */ | |
2049 | ||
a06ea964 | 2050 | static bfd_boolean |
62b0d0d5 YZ |
2051 | aarch64_double_precision_fmovable (uint64_t imm, uint32_t *fpword) |
2052 | { | |
2053 | /* If a double-precision floating-point value has the following bit | |
2054 | pattern, it can be expressed in the AArch64 8-bit floating-point | |
2055 | format: | |
2056 | ||
2057 | 6 66655555555 554444444...21111111111 | |
2058 | 3 21098765432 109876543...098765432109876543210 | |
2059 | n Eeeeeeeeexx xxxx00000...000000000000000000000 | |
2060 | ||
2061 | where n, e and each x are either 0 or 1 independently, with | |
2062 | E == ~ e. */ | |
2063 | ||
2064 | uint32_t pattern; | |
2065 | uint32_t high32 = imm >> 32; | |
2066 | ||
2067 | /* Lower 32 bits need to be 0s. */ | |
2068 | if ((imm & 0xffffffff) != 0) | |
2069 | return FALSE; | |
2070 | ||
2071 | /* Prepare the pattern for 'Eeeeeeeee'. */ | |
2072 | if (((high32 >> 30) & 0x1) == 0) | |
2073 | pattern = 0x3fc00000; | |
2074 | else | |
2075 | pattern = 0x40000000; | |
2076 | ||
2077 | if ((high32 & 0xffff) == 0 /* bits 32 - 47 are 0. */ | |
2078 | && (high32 & 0x7fc00000) == pattern) /* bits 54 - 61 == ~ bit 62. */ | |
2079 | { | |
2080 | /* Convert to the single-precision encoding. | |
2081 | i.e. convert | |
2082 | n Eeeeeeeeexx xxxx00000...000000000000000000000 | |
2083 | to | |
2084 | n Eeeeeexx xxxx0000000000000000000. */ | |
2085 | *fpword = ((high32 & 0xfe000000) /* nEeeeee. */ | |
2086 | | (((high32 >> 16) & 0x3f) << 19)); /* xxxxxx. */ | |
2087 | return TRUE; | |
2088 | } | |
2089 | else | |
2090 | return FALSE; | |
2091 | } | |
2092 | ||
2093 | /* Parse a floating-point immediate. Return TRUE on success and return the | |
2094 | value in *IMMED in the format of IEEE754 single-precision encoding. | |
2095 | *CCP points to the start of the string; DP_P is TRUE when the immediate | |
2096 | is expected to be in double-precision (N.B. this only matters when | |
2097 | hexadecimal representation is involved). | |
2098 | ||
2099 | N.B. 0.0 is accepted by this function. */ | |
2100 | ||
2101 | static bfd_boolean | |
2102 | parse_aarch64_imm_float (char **ccp, int *immed, bfd_boolean dp_p) | |
a06ea964 NC |
2103 | { |
2104 | char *str = *ccp; | |
2105 | char *fpnum; | |
2106 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
2107 | int found_fpchar = 0; | |
62b0d0d5 YZ |
2108 | int64_t val = 0; |
2109 | unsigned fpword = 0; | |
2110 | bfd_boolean hex_p = FALSE; | |
a06ea964 NC |
2111 | |
2112 | skip_past_char (&str, '#'); | |
2113 | ||
a06ea964 NC |
2114 | fpnum = str; |
2115 | skip_whitespace (fpnum); | |
2116 | ||
2117 | if (strncmp (fpnum, "0x", 2) == 0) | |
62b0d0d5 YZ |
2118 | { |
2119 | /* Support the hexadecimal representation of the IEEE754 encoding. | |
2120 | Double-precision is expected when DP_P is TRUE, otherwise the | |
2121 | representation should be in single-precision. */ | |
2122 | if (! parse_constant_immediate (&str, &val)) | |
2123 | goto invalid_fp; | |
2124 | ||
2125 | if (dp_p) | |
2126 | { | |
2127 | if (! aarch64_double_precision_fmovable (val, &fpword)) | |
2128 | goto invalid_fp; | |
2129 | } | |
2130 | else if ((uint64_t) val > 0xffffffff) | |
2131 | goto invalid_fp; | |
2132 | else | |
2133 | fpword = val; | |
2134 | ||
2135 | hex_p = TRUE; | |
2136 | } | |
a06ea964 NC |
2137 | else |
2138 | { | |
62b0d0d5 YZ |
2139 | /* We must not accidentally parse an integer as a floating-point number. |
2140 | Make sure that the value we parse is not an integer by checking for | |
2141 | special characters '.' or 'e'. */ | |
a06ea964 NC |
2142 | for (; *fpnum != '\0' && *fpnum != ' ' && *fpnum != '\n'; fpnum++) |
2143 | if (*fpnum == '.' || *fpnum == 'e' || *fpnum == 'E') | |
2144 | { | |
2145 | found_fpchar = 1; | |
2146 | break; | |
2147 | } | |
2148 | ||
2149 | if (!found_fpchar) | |
2150 | return FALSE; | |
2151 | } | |
2152 | ||
62b0d0d5 | 2153 | if (! hex_p) |
a06ea964 | 2154 | { |
a06ea964 NC |
2155 | int i; |
2156 | ||
62b0d0d5 YZ |
2157 | if ((str = atof_ieee (str, 's', words)) == NULL) |
2158 | goto invalid_fp; | |
2159 | ||
a06ea964 NC |
2160 | /* Our FP word must be 32 bits (single-precision FP). */ |
2161 | for (i = 0; i < 32 / LITTLENUM_NUMBER_OF_BITS; i++) | |
2162 | { | |
2163 | fpword <<= LITTLENUM_NUMBER_OF_BITS; | |
2164 | fpword |= words[i]; | |
2165 | } | |
62b0d0d5 | 2166 | } |
a06ea964 | 2167 | |
62b0d0d5 YZ |
2168 | if (aarch64_imm_float_p (fpword) || (fpword & 0x7fffffff) == 0) |
2169 | { | |
2170 | *immed = fpword; | |
a06ea964 | 2171 | *ccp = str; |
a06ea964 NC |
2172 | return TRUE; |
2173 | } | |
2174 | ||
2175 | invalid_fp: | |
2176 | set_fatal_syntax_error (_("invalid floating-point constant")); | |
2177 | return FALSE; | |
2178 | } | |
2179 | ||
2180 | /* Less-generic immediate-value read function with the possibility of loading | |
2181 | a big (64-bit) immediate, as required by AdvSIMD Modified immediate | |
2182 | instructions. | |
2183 | ||
2184 | To prevent the expression parser from pushing a register name into the | |
2185 | symbol table as an undefined symbol, a check is firstly done to find | |
2186 | out whether STR is a valid register name followed by a comma or the end | |
2187 | of line. Return FALSE if STR is such a register. */ | |
2188 | ||
2189 | static bfd_boolean | |
2190 | parse_big_immediate (char **str, int64_t *imm) | |
2191 | { | |
2192 | char *ptr = *str; | |
2193 | ||
2194 | if (reg_name_p (ptr, REG_TYPE_R_Z_BHSDQ_V)) | |
2195 | { | |
2196 | set_syntax_error (_("immediate operand required")); | |
2197 | return FALSE; | |
2198 | } | |
2199 | ||
2200 | my_get_expression (&inst.reloc.exp, &ptr, GE_OPT_PREFIX, 1); | |
2201 | ||
2202 | if (inst.reloc.exp.X_op == O_constant) | |
2203 | *imm = inst.reloc.exp.X_add_number; | |
2204 | ||
2205 | *str = ptr; | |
2206 | ||
2207 | return TRUE; | |
2208 | } | |
2209 | ||
2210 | /* Set operand IDX of the *INSTR that needs a GAS internal fixup. | |
2211 | if NEED_LIBOPCODES is non-zero, the fixup will need | |
2212 | assistance from the libopcodes. */ | |
2213 | ||
2214 | static inline void | |
2215 | aarch64_set_gas_internal_fixup (struct reloc *reloc, | |
2216 | const aarch64_opnd_info *operand, | |
2217 | int need_libopcodes_p) | |
2218 | { | |
2219 | reloc->type = BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP; | |
2220 | reloc->opnd = operand->type; | |
2221 | if (need_libopcodes_p) | |
2222 | reloc->need_libopcodes_p = 1; | |
2223 | }; | |
2224 | ||
2225 | /* Return TRUE if the instruction needs to be fixed up later internally by | |
2226 | the GAS; otherwise return FALSE. */ | |
2227 | ||
2228 | static inline bfd_boolean | |
2229 | aarch64_gas_internal_fixup_p (void) | |
2230 | { | |
2231 | return inst.reloc.type == BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP; | |
2232 | } | |
2233 | ||
2234 | /* Assign the immediate value to the relavant field in *OPERAND if | |
2235 | RELOC->EXP is a constant expression; otherwise, flag that *OPERAND | |
2236 | needs an internal fixup in a later stage. | |
2237 | ADDR_OFF_P determines whether it is the field ADDR.OFFSET.IMM or | |
2238 | IMM.VALUE that may get assigned with the constant. */ | |
2239 | static inline void | |
2240 | assign_imm_if_const_or_fixup_later (struct reloc *reloc, | |
2241 | aarch64_opnd_info *operand, | |
2242 | int addr_off_p, | |
2243 | int need_libopcodes_p, | |
2244 | int skip_p) | |
2245 | { | |
2246 | if (reloc->exp.X_op == O_constant) | |
2247 | { | |
2248 | if (addr_off_p) | |
2249 | operand->addr.offset.imm = reloc->exp.X_add_number; | |
2250 | else | |
2251 | operand->imm.value = reloc->exp.X_add_number; | |
2252 | reloc->type = BFD_RELOC_UNUSED; | |
2253 | } | |
2254 | else | |
2255 | { | |
2256 | aarch64_set_gas_internal_fixup (reloc, operand, need_libopcodes_p); | |
2257 | /* Tell libopcodes to ignore this operand or not. This is helpful | |
2258 | when one of the operands needs to be fixed up later but we need | |
2259 | libopcodes to check the other operands. */ | |
2260 | operand->skip = skip_p; | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | /* Relocation modifiers. Each entry in the table contains the textual | |
2265 | name for the relocation which may be placed before a symbol used as | |
2266 | a load/store offset, or add immediate. It must be surrounded by a | |
2267 | leading and trailing colon, for example: | |
2268 | ||
2269 | ldr x0, [x1, #:rello:varsym] | |
2270 | add x0, x1, #:rello:varsym */ | |
2271 | ||
2272 | struct reloc_table_entry | |
2273 | { | |
2274 | const char *name; | |
2275 | int pc_rel; | |
2276 | bfd_reloc_code_real_type adrp_type; | |
2277 | bfd_reloc_code_real_type movw_type; | |
2278 | bfd_reloc_code_real_type add_type; | |
2279 | bfd_reloc_code_real_type ldst_type; | |
2280 | }; | |
2281 | ||
2282 | static struct reloc_table_entry reloc_table[] = { | |
2283 | /* Low 12 bits of absolute address: ADD/i and LDR/STR */ | |
2284 | {"lo12", 0, | |
2285 | 0, | |
2286 | 0, | |
2287 | BFD_RELOC_AARCH64_ADD_LO12, | |
2288 | BFD_RELOC_AARCH64_LDST_LO12}, | |
2289 | ||
2290 | /* Higher 21 bits of pc-relative page offset: ADRP */ | |
2291 | {"pg_hi21", 1, | |
2292 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, | |
2293 | 0, | |
2294 | 0, | |
2295 | 0}, | |
2296 | ||
2297 | /* Higher 21 bits of pc-relative page offset: ADRP, no check */ | |
2298 | {"pg_hi21_nc", 1, | |
2299 | BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL, | |
2300 | 0, | |
2301 | 0, | |
2302 | 0}, | |
2303 | ||
2304 | /* Most significant bits 0-15 of unsigned address/value: MOVZ */ | |
2305 | {"abs_g0", 0, | |
2306 | 0, | |
2307 | BFD_RELOC_AARCH64_MOVW_G0, | |
2308 | 0, | |
2309 | 0}, | |
2310 | ||
2311 | /* Most significant bits 0-15 of signed address/value: MOVN/Z */ | |
2312 | {"abs_g0_s", 0, | |
2313 | 0, | |
2314 | BFD_RELOC_AARCH64_MOVW_G0_S, | |
2315 | 0, | |
2316 | 0}, | |
2317 | ||
2318 | /* Less significant bits 0-15 of address/value: MOVK, no check */ | |
2319 | {"abs_g0_nc", 0, | |
2320 | 0, | |
2321 | BFD_RELOC_AARCH64_MOVW_G0_NC, | |
2322 | 0, | |
2323 | 0}, | |
2324 | ||
2325 | /* Most significant bits 16-31 of unsigned address/value: MOVZ */ | |
2326 | {"abs_g1", 0, | |
2327 | 0, | |
2328 | BFD_RELOC_AARCH64_MOVW_G1, | |
2329 | 0, | |
2330 | 0}, | |
2331 | ||
2332 | /* Most significant bits 16-31 of signed address/value: MOVN/Z */ | |
2333 | {"abs_g1_s", 0, | |
2334 | 0, | |
2335 | BFD_RELOC_AARCH64_MOVW_G1_S, | |
2336 | 0, | |
2337 | 0}, | |
2338 | ||
2339 | /* Less significant bits 16-31 of address/value: MOVK, no check */ | |
2340 | {"abs_g1_nc", 0, | |
2341 | 0, | |
2342 | BFD_RELOC_AARCH64_MOVW_G1_NC, | |
2343 | 0, | |
2344 | 0}, | |
2345 | ||
2346 | /* Most significant bits 32-47 of unsigned address/value: MOVZ */ | |
2347 | {"abs_g2", 0, | |
2348 | 0, | |
2349 | BFD_RELOC_AARCH64_MOVW_G2, | |
2350 | 0, | |
2351 | 0}, | |
2352 | ||
2353 | /* Most significant bits 32-47 of signed address/value: MOVN/Z */ | |
2354 | {"abs_g2_s", 0, | |
2355 | 0, | |
2356 | BFD_RELOC_AARCH64_MOVW_G2_S, | |
2357 | 0, | |
2358 | 0}, | |
2359 | ||
2360 | /* Less significant bits 32-47 of address/value: MOVK, no check */ | |
2361 | {"abs_g2_nc", 0, | |
2362 | 0, | |
2363 | BFD_RELOC_AARCH64_MOVW_G2_NC, | |
2364 | 0, | |
2365 | 0}, | |
2366 | ||
2367 | /* Most significant bits 48-63 of signed/unsigned address/value: MOVZ */ | |
2368 | {"abs_g3", 0, | |
2369 | 0, | |
2370 | BFD_RELOC_AARCH64_MOVW_G3, | |
2371 | 0, | |
2372 | 0}, | |
4aa2c5e2 | 2373 | |
a06ea964 NC |
2374 | /* Get to the page containing GOT entry for a symbol. */ |
2375 | {"got", 1, | |
2376 | BFD_RELOC_AARCH64_ADR_GOT_PAGE, | |
2377 | 0, | |
2378 | 0, | |
4aa2c5e2 MS |
2379 | BFD_RELOC_AARCH64_GOT_LD_PREL19}, |
2380 | ||
a06ea964 NC |
2381 | /* 12 bit offset into the page containing GOT entry for that symbol. */ |
2382 | {"got_lo12", 0, | |
2383 | 0, | |
2384 | 0, | |
2385 | 0, | |
a6bb11b2 | 2386 | BFD_RELOC_AARCH64_LD_GOT_LO12_NC}, |
a06ea964 NC |
2387 | |
2388 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2389 | {"tlsgd", 0, | |
2390 | BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21, | |
2391 | 0, | |
2392 | 0, | |
2393 | 0}, | |
2394 | ||
2395 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2396 | {"tlsgd_lo12", 0, | |
2397 | 0, | |
2398 | 0, | |
2399 | BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC, | |
2400 | 0}, | |
2401 | ||
2402 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2403 | {"tlsdesc", 0, | |
418009c2 | 2404 | BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21, |
a06ea964 NC |
2405 | 0, |
2406 | 0, | |
2407 | 0}, | |
2408 | ||
2409 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2410 | {"tlsdesc_lo12", 0, | |
2411 | 0, | |
2412 | 0, | |
2413 | BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC, | |
a6bb11b2 | 2414 | BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC}, |
a06ea964 NC |
2415 | |
2416 | /* Get to the page containing GOT TLS entry for a symbol */ | |
2417 | {"gottprel", 0, | |
2418 | BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21, | |
2419 | 0, | |
2420 | 0, | |
2421 | 0}, | |
2422 | ||
2423 | /* 12 bit offset into the page containing GOT TLS entry for a symbol */ | |
2424 | {"gottprel_lo12", 0, | |
2425 | 0, | |
2426 | 0, | |
2427 | 0, | |
a6bb11b2 | 2428 | BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC}, |
a06ea964 NC |
2429 | |
2430 | /* Get tp offset for a symbol. */ | |
2431 | {"tprel", 0, | |
2432 | 0, | |
2433 | 0, | |
2434 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, | |
2435 | 0}, | |
2436 | ||
2437 | /* Get tp offset for a symbol. */ | |
2438 | {"tprel_lo12", 0, | |
2439 | 0, | |
2440 | 0, | |
2441 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12, | |
2442 | 0}, | |
2443 | ||
2444 | /* Get tp offset for a symbol. */ | |
2445 | {"tprel_hi12", 0, | |
2446 | 0, | |
2447 | 0, | |
2448 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12, | |
2449 | 0}, | |
2450 | ||
2451 | /* Get tp offset for a symbol. */ | |
2452 | {"tprel_lo12_nc", 0, | |
2453 | 0, | |
2454 | 0, | |
2455 | BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC, | |
2456 | 0}, | |
2457 | ||
2458 | /* Most significant bits 32-47 of address/value: MOVZ. */ | |
2459 | {"tprel_g2", 0, | |
2460 | 0, | |
2461 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2, | |
2462 | 0, | |
2463 | 0}, | |
2464 | ||
2465 | /* Most significant bits 16-31 of address/value: MOVZ. */ | |
2466 | {"tprel_g1", 0, | |
2467 | 0, | |
2468 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1, | |
2469 | 0, | |
2470 | 0}, | |
2471 | ||
2472 | /* Most significant bits 16-31 of address/value: MOVZ, no check. */ | |
2473 | {"tprel_g1_nc", 0, | |
2474 | 0, | |
2475 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC, | |
2476 | 0, | |
2477 | 0}, | |
2478 | ||
2479 | /* Most significant bits 0-15 of address/value: MOVZ. */ | |
2480 | {"tprel_g0", 0, | |
2481 | 0, | |
2482 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0, | |
2483 | 0, | |
2484 | 0}, | |
2485 | ||
2486 | /* Most significant bits 0-15 of address/value: MOVZ, no check. */ | |
2487 | {"tprel_g0_nc", 0, | |
2488 | 0, | |
2489 | BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC, | |
2490 | 0, | |
2491 | 0}, | |
2492 | }; | |
2493 | ||
2494 | /* Given the address of a pointer pointing to the textual name of a | |
2495 | relocation as may appear in assembler source, attempt to find its | |
2496 | details in reloc_table. The pointer will be updated to the character | |
2497 | after the trailing colon. On failure, NULL will be returned; | |
2498 | otherwise return the reloc_table_entry. */ | |
2499 | ||
2500 | static struct reloc_table_entry * | |
2501 | find_reloc_table_entry (char **str) | |
2502 | { | |
2503 | unsigned int i; | |
2504 | for (i = 0; i < ARRAY_SIZE (reloc_table); i++) | |
2505 | { | |
2506 | int length = strlen (reloc_table[i].name); | |
2507 | ||
2508 | if (strncasecmp (reloc_table[i].name, *str, length) == 0 | |
2509 | && (*str)[length] == ':') | |
2510 | { | |
2511 | *str += (length + 1); | |
2512 | return &reloc_table[i]; | |
2513 | } | |
2514 | } | |
2515 | ||
2516 | return NULL; | |
2517 | } | |
2518 | ||
2519 | /* Mode argument to parse_shift and parser_shifter_operand. */ | |
2520 | enum parse_shift_mode | |
2521 | { | |
2522 | SHIFTED_ARITH_IMM, /* "rn{,lsl|lsr|asl|asr|uxt|sxt #n}" or | |
2523 | "#imm{,lsl #n}" */ | |
2524 | SHIFTED_LOGIC_IMM, /* "rn{,lsl|lsr|asl|asr|ror #n}" or | |
2525 | "#imm" */ | |
2526 | SHIFTED_LSL, /* bare "lsl #n" */ | |
2527 | SHIFTED_LSL_MSL, /* "lsl|msl #n" */ | |
2528 | SHIFTED_REG_OFFSET /* [su]xtw|sxtx {#n} or lsl #n */ | |
2529 | }; | |
2530 | ||
2531 | /* Parse a <shift> operator on an AArch64 data processing instruction. | |
2532 | Return TRUE on success; otherwise return FALSE. */ | |
2533 | static bfd_boolean | |
2534 | parse_shift (char **str, aarch64_opnd_info *operand, enum parse_shift_mode mode) | |
2535 | { | |
2536 | const struct aarch64_name_value_pair *shift_op; | |
2537 | enum aarch64_modifier_kind kind; | |
2538 | expressionS exp; | |
2539 | int exp_has_prefix; | |
2540 | char *s = *str; | |
2541 | char *p = s; | |
2542 | ||
2543 | for (p = *str; ISALPHA (*p); p++) | |
2544 | ; | |
2545 | ||
2546 | if (p == *str) | |
2547 | { | |
2548 | set_syntax_error (_("shift expression expected")); | |
2549 | return FALSE; | |
2550 | } | |
2551 | ||
2552 | shift_op = hash_find_n (aarch64_shift_hsh, *str, p - *str); | |
2553 | ||
2554 | if (shift_op == NULL) | |
2555 | { | |
2556 | set_syntax_error (_("shift operator expected")); | |
2557 | return FALSE; | |
2558 | } | |
2559 | ||
2560 | kind = aarch64_get_operand_modifier (shift_op); | |
2561 | ||
2562 | if (kind == AARCH64_MOD_MSL && mode != SHIFTED_LSL_MSL) | |
2563 | { | |
2564 | set_syntax_error (_("invalid use of 'MSL'")); | |
2565 | return FALSE; | |
2566 | } | |
2567 | ||
2568 | switch (mode) | |
2569 | { | |
2570 | case SHIFTED_LOGIC_IMM: | |
2571 | if (aarch64_extend_operator_p (kind) == TRUE) | |
2572 | { | |
2573 | set_syntax_error (_("extending shift is not permitted")); | |
2574 | return FALSE; | |
2575 | } | |
2576 | break; | |
2577 | ||
2578 | case SHIFTED_ARITH_IMM: | |
2579 | if (kind == AARCH64_MOD_ROR) | |
2580 | { | |
2581 | set_syntax_error (_("'ROR' shift is not permitted")); | |
2582 | return FALSE; | |
2583 | } | |
2584 | break; | |
2585 | ||
2586 | case SHIFTED_LSL: | |
2587 | if (kind != AARCH64_MOD_LSL) | |
2588 | { | |
2589 | set_syntax_error (_("only 'LSL' shift is permitted")); | |
2590 | return FALSE; | |
2591 | } | |
2592 | break; | |
2593 | ||
2594 | case SHIFTED_REG_OFFSET: | |
2595 | if (kind != AARCH64_MOD_UXTW && kind != AARCH64_MOD_LSL | |
2596 | && kind != AARCH64_MOD_SXTW && kind != AARCH64_MOD_SXTX) | |
2597 | { | |
2598 | set_fatal_syntax_error | |
2599 | (_("invalid shift for the register offset addressing mode")); | |
2600 | return FALSE; | |
2601 | } | |
2602 | break; | |
2603 | ||
2604 | case SHIFTED_LSL_MSL: | |
2605 | if (kind != AARCH64_MOD_LSL && kind != AARCH64_MOD_MSL) | |
2606 | { | |
2607 | set_syntax_error (_("invalid shift operator")); | |
2608 | return FALSE; | |
2609 | } | |
2610 | break; | |
2611 | ||
2612 | default: | |
2613 | abort (); | |
2614 | } | |
2615 | ||
2616 | /* Whitespace can appear here if the next thing is a bare digit. */ | |
2617 | skip_whitespace (p); | |
2618 | ||
2619 | /* Parse shift amount. */ | |
2620 | exp_has_prefix = 0; | |
2621 | if (mode == SHIFTED_REG_OFFSET && *p == ']') | |
2622 | exp.X_op = O_absent; | |
2623 | else | |
2624 | { | |
2625 | if (is_immediate_prefix (*p)) | |
2626 | { | |
2627 | p++; | |
2628 | exp_has_prefix = 1; | |
2629 | } | |
2630 | my_get_expression (&exp, &p, GE_NO_PREFIX, 0); | |
2631 | } | |
2632 | if (exp.X_op == O_absent) | |
2633 | { | |
2634 | if (aarch64_extend_operator_p (kind) == FALSE || exp_has_prefix) | |
2635 | { | |
2636 | set_syntax_error (_("missing shift amount")); | |
2637 | return FALSE; | |
2638 | } | |
2639 | operand->shifter.amount = 0; | |
2640 | } | |
2641 | else if (exp.X_op != O_constant) | |
2642 | { | |
2643 | set_syntax_error (_("constant shift amount required")); | |
2644 | return FALSE; | |
2645 | } | |
2646 | else if (exp.X_add_number < 0 || exp.X_add_number > 63) | |
2647 | { | |
2648 | set_fatal_syntax_error (_("shift amount out of range 0 to 63")); | |
2649 | return FALSE; | |
2650 | } | |
2651 | else | |
2652 | { | |
2653 | operand->shifter.amount = exp.X_add_number; | |
2654 | operand->shifter.amount_present = 1; | |
2655 | } | |
2656 | ||
2657 | operand->shifter.operator_present = 1; | |
2658 | operand->shifter.kind = kind; | |
2659 | ||
2660 | *str = p; | |
2661 | return TRUE; | |
2662 | } | |
2663 | ||
2664 | /* Parse a <shifter_operand> for a data processing instruction: | |
2665 | ||
2666 | #<immediate> | |
2667 | #<immediate>, LSL #imm | |
2668 | ||
2669 | Validation of immediate operands is deferred to md_apply_fix. | |
2670 | ||
2671 | Return TRUE on success; otherwise return FALSE. */ | |
2672 | ||
2673 | static bfd_boolean | |
2674 | parse_shifter_operand_imm (char **str, aarch64_opnd_info *operand, | |
2675 | enum parse_shift_mode mode) | |
2676 | { | |
2677 | char *p; | |
2678 | ||
2679 | if (mode != SHIFTED_ARITH_IMM && mode != SHIFTED_LOGIC_IMM) | |
2680 | return FALSE; | |
2681 | ||
2682 | p = *str; | |
2683 | ||
2684 | /* Accept an immediate expression. */ | |
2685 | if (! my_get_expression (&inst.reloc.exp, &p, GE_OPT_PREFIX, 1)) | |
2686 | return FALSE; | |
2687 | ||
2688 | /* Accept optional LSL for arithmetic immediate values. */ | |
2689 | if (mode == SHIFTED_ARITH_IMM && skip_past_comma (&p)) | |
2690 | if (! parse_shift (&p, operand, SHIFTED_LSL)) | |
2691 | return FALSE; | |
2692 | ||
2693 | /* Not accept any shifter for logical immediate values. */ | |
2694 | if (mode == SHIFTED_LOGIC_IMM && skip_past_comma (&p) | |
2695 | && parse_shift (&p, operand, mode)) | |
2696 | { | |
2697 | set_syntax_error (_("unexpected shift operator")); | |
2698 | return FALSE; | |
2699 | } | |
2700 | ||
2701 | *str = p; | |
2702 | return TRUE; | |
2703 | } | |
2704 | ||
2705 | /* Parse a <shifter_operand> for a data processing instruction: | |
2706 | ||
2707 | <Rm> | |
2708 | <Rm>, <shift> | |
2709 | #<immediate> | |
2710 | #<immediate>, LSL #imm | |
2711 | ||
2712 | where <shift> is handled by parse_shift above, and the last two | |
2713 | cases are handled by the function above. | |
2714 | ||
2715 | Validation of immediate operands is deferred to md_apply_fix. | |
2716 | ||
2717 | Return TRUE on success; otherwise return FALSE. */ | |
2718 | ||
2719 | static bfd_boolean | |
2720 | parse_shifter_operand (char **str, aarch64_opnd_info *operand, | |
2721 | enum parse_shift_mode mode) | |
2722 | { | |
2723 | int reg; | |
2724 | int isreg32, isregzero; | |
2725 | enum aarch64_operand_class opd_class | |
2726 | = aarch64_get_operand_class (operand->type); | |
2727 | ||
2728 | if ((reg = | |
2729 | aarch64_reg_parse_32_64 (str, 0, 0, &isreg32, &isregzero)) != PARSE_FAIL) | |
2730 | { | |
2731 | if (opd_class == AARCH64_OPND_CLASS_IMMEDIATE) | |
2732 | { | |
2733 | set_syntax_error (_("unexpected register in the immediate operand")); | |
2734 | return FALSE; | |
2735 | } | |
2736 | ||
2737 | if (!isregzero && reg == REG_SP) | |
2738 | { | |
2739 | set_syntax_error (BAD_SP); | |
2740 | return FALSE; | |
2741 | } | |
2742 | ||
2743 | operand->reg.regno = reg; | |
2744 | operand->qualifier = isreg32 ? AARCH64_OPND_QLF_W : AARCH64_OPND_QLF_X; | |
2745 | ||
2746 | /* Accept optional shift operation on register. */ | |
2747 | if (! skip_past_comma (str)) | |
2748 | return TRUE; | |
2749 | ||
2750 | if (! parse_shift (str, operand, mode)) | |
2751 | return FALSE; | |
2752 | ||
2753 | return TRUE; | |
2754 | } | |
2755 | else if (opd_class == AARCH64_OPND_CLASS_MODIFIED_REG) | |
2756 | { | |
2757 | set_syntax_error | |
2758 | (_("integer register expected in the extended/shifted operand " | |
2759 | "register")); | |
2760 | return FALSE; | |
2761 | } | |
2762 | ||
2763 | /* We have a shifted immediate variable. */ | |
2764 | return parse_shifter_operand_imm (str, operand, mode); | |
2765 | } | |
2766 | ||
2767 | /* Return TRUE on success; return FALSE otherwise. */ | |
2768 | ||
2769 | static bfd_boolean | |
2770 | parse_shifter_operand_reloc (char **str, aarch64_opnd_info *operand, | |
2771 | enum parse_shift_mode mode) | |
2772 | { | |
2773 | char *p = *str; | |
2774 | ||
2775 | /* Determine if we have the sequence of characters #: or just : | |
2776 | coming next. If we do, then we check for a :rello: relocation | |
2777 | modifier. If we don't, punt the whole lot to | |
2778 | parse_shifter_operand. */ | |
2779 | ||
2780 | if ((p[0] == '#' && p[1] == ':') || p[0] == ':') | |
2781 | { | |
2782 | struct reloc_table_entry *entry; | |
2783 | ||
2784 | if (p[0] == '#') | |
2785 | p += 2; | |
2786 | else | |
2787 | p++; | |
2788 | *str = p; | |
2789 | ||
2790 | /* Try to parse a relocation. Anything else is an error. */ | |
2791 | if (!(entry = find_reloc_table_entry (str))) | |
2792 | { | |
2793 | set_syntax_error (_("unknown relocation modifier")); | |
2794 | return FALSE; | |
2795 | } | |
2796 | ||
2797 | if (entry->add_type == 0) | |
2798 | { | |
2799 | set_syntax_error | |
2800 | (_("this relocation modifier is not allowed on this instruction")); | |
2801 | return FALSE; | |
2802 | } | |
2803 | ||
2804 | /* Save str before we decompose it. */ | |
2805 | p = *str; | |
2806 | ||
2807 | /* Next, we parse the expression. */ | |
2808 | if (! my_get_expression (&inst.reloc.exp, str, GE_NO_PREFIX, 1)) | |
2809 | return FALSE; | |
2810 | ||
2811 | /* Record the relocation type (use the ADD variant here). */ | |
2812 | inst.reloc.type = entry->add_type; | |
2813 | inst.reloc.pc_rel = entry->pc_rel; | |
2814 | ||
2815 | /* If str is empty, we've reached the end, stop here. */ | |
2816 | if (**str == '\0') | |
2817 | return TRUE; | |
2818 | ||
2819 | /* Otherwise, we have a shifted reloc modifier, so rewind to | |
2820 | recover the variable name and continue parsing for the shifter. */ | |
2821 | *str = p; | |
2822 | return parse_shifter_operand_imm (str, operand, mode); | |
2823 | } | |
2824 | ||
2825 | return parse_shifter_operand (str, operand, mode); | |
2826 | } | |
2827 | ||
2828 | /* Parse all forms of an address expression. Information is written | |
2829 | to *OPERAND and/or inst.reloc. | |
2830 | ||
2831 | The A64 instruction set has the following addressing modes: | |
2832 | ||
2833 | Offset | |
2834 | [base] // in SIMD ld/st structure | |
2835 | [base{,#0}] // in ld/st exclusive | |
2836 | [base{,#imm}] | |
2837 | [base,Xm{,LSL #imm}] | |
2838 | [base,Xm,SXTX {#imm}] | |
2839 | [base,Wm,(S|U)XTW {#imm}] | |
2840 | Pre-indexed | |
2841 | [base,#imm]! | |
2842 | Post-indexed | |
2843 | [base],#imm | |
2844 | [base],Xm // in SIMD ld/st structure | |
2845 | PC-relative (literal) | |
2846 | label | |
2847 | =immediate | |
2848 | ||
2849 | (As a convenience, the notation "=immediate" is permitted in conjunction | |
2850 | with the pc-relative literal load instructions to automatically place an | |
2851 | immediate value or symbolic address in a nearby literal pool and generate | |
2852 | a hidden label which references it.) | |
2853 | ||
2854 | Upon a successful parsing, the address structure in *OPERAND will be | |
2855 | filled in the following way: | |
2856 | ||
2857 | .base_regno = <base> | |
2858 | .offset.is_reg // 1 if the offset is a register | |
2859 | .offset.imm = <imm> | |
2860 | .offset.regno = <Rm> | |
2861 | ||
2862 | For different addressing modes defined in the A64 ISA: | |
2863 | ||
2864 | Offset | |
2865 | .pcrel=0; .preind=1; .postind=0; .writeback=0 | |
2866 | Pre-indexed | |
2867 | .pcrel=0; .preind=1; .postind=0; .writeback=1 | |
2868 | Post-indexed | |
2869 | .pcrel=0; .preind=0; .postind=1; .writeback=1 | |
2870 | PC-relative (literal) | |
2871 | .pcrel=1; .preind=1; .postind=0; .writeback=0 | |
2872 | ||
2873 | The shift/extension information, if any, will be stored in .shifter. | |
2874 | ||
2875 | It is the caller's responsibility to check for addressing modes not | |
2876 | supported by the instruction, and to set inst.reloc.type. */ | |
2877 | ||
2878 | static bfd_boolean | |
2879 | parse_address_main (char **str, aarch64_opnd_info *operand, int reloc, | |
2880 | int accept_reg_post_index) | |
2881 | { | |
2882 | char *p = *str; | |
2883 | int reg; | |
2884 | int isreg32, isregzero; | |
2885 | expressionS *exp = &inst.reloc.exp; | |
2886 | ||
2887 | if (! skip_past_char (&p, '[')) | |
2888 | { | |
2889 | /* =immediate or label. */ | |
2890 | operand->addr.pcrel = 1; | |
2891 | operand->addr.preind = 1; | |
2892 | ||
f41aef5f RE |
2893 | /* #:<reloc_op>:<symbol> */ |
2894 | skip_past_char (&p, '#'); | |
2895 | if (reloc && skip_past_char (&p, ':')) | |
2896 | { | |
2897 | struct reloc_table_entry *entry; | |
2898 | ||
2899 | /* Try to parse a relocation modifier. Anything else is | |
2900 | an error. */ | |
2901 | entry = find_reloc_table_entry (&p); | |
2902 | if (! entry) | |
2903 | { | |
2904 | set_syntax_error (_("unknown relocation modifier")); | |
2905 | return FALSE; | |
2906 | } | |
2907 | ||
2908 | if (entry->ldst_type == 0) | |
2909 | { | |
2910 | set_syntax_error | |
2911 | (_("this relocation modifier is not allowed on this " | |
2912 | "instruction")); | |
2913 | return FALSE; | |
2914 | } | |
2915 | ||
2916 | /* #:<reloc_op>: */ | |
2917 | if (! my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
2918 | { | |
2919 | set_syntax_error (_("invalid relocation expression")); | |
2920 | return FALSE; | |
2921 | } | |
a06ea964 | 2922 | |
f41aef5f RE |
2923 | /* #:<reloc_op>:<expr> */ |
2924 | /* Record the load/store relocation type. */ | |
2925 | inst.reloc.type = entry->ldst_type; | |
2926 | inst.reloc.pc_rel = entry->pc_rel; | |
2927 | } | |
2928 | else | |
a06ea964 | 2929 | { |
f41aef5f RE |
2930 | |
2931 | if (skip_past_char (&p, '=')) | |
2932 | /* =immediate; need to generate the literal in the literal pool. */ | |
2933 | inst.gen_lit_pool = 1; | |
2934 | ||
2935 | if (!my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
2936 | { | |
2937 | set_syntax_error (_("invalid address")); | |
2938 | return FALSE; | |
2939 | } | |
a06ea964 NC |
2940 | } |
2941 | ||
2942 | *str = p; | |
2943 | return TRUE; | |
2944 | } | |
2945 | ||
2946 | /* [ */ | |
2947 | ||
2948 | /* Accept SP and reject ZR */ | |
2949 | reg = aarch64_reg_parse_32_64 (&p, 0, 1, &isreg32, &isregzero); | |
2950 | if (reg == PARSE_FAIL || isreg32) | |
2951 | { | |
2952 | set_syntax_error (_(get_reg_expected_msg (REG_TYPE_R_64))); | |
2953 | return FALSE; | |
2954 | } | |
2955 | operand->addr.base_regno = reg; | |
2956 | ||
2957 | /* [Xn */ | |
2958 | if (skip_past_comma (&p)) | |
2959 | { | |
2960 | /* [Xn, */ | |
2961 | operand->addr.preind = 1; | |
2962 | ||
2963 | /* Reject SP and accept ZR */ | |
2964 | reg = aarch64_reg_parse_32_64 (&p, 1, 0, &isreg32, &isregzero); | |
2965 | if (reg != PARSE_FAIL) | |
2966 | { | |
2967 | /* [Xn,Rm */ | |
2968 | operand->addr.offset.regno = reg; | |
2969 | operand->addr.offset.is_reg = 1; | |
2970 | /* Shifted index. */ | |
2971 | if (skip_past_comma (&p)) | |
2972 | { | |
2973 | /* [Xn,Rm, */ | |
2974 | if (! parse_shift (&p, operand, SHIFTED_REG_OFFSET)) | |
2975 | /* Use the diagnostics set in parse_shift, so not set new | |
2976 | error message here. */ | |
2977 | return FALSE; | |
2978 | } | |
2979 | /* We only accept: | |
2980 | [base,Xm{,LSL #imm}] | |
2981 | [base,Xm,SXTX {#imm}] | |
2982 | [base,Wm,(S|U)XTW {#imm}] */ | |
2983 | if (operand->shifter.kind == AARCH64_MOD_NONE | |
2984 | || operand->shifter.kind == AARCH64_MOD_LSL | |
2985 | || operand->shifter.kind == AARCH64_MOD_SXTX) | |
2986 | { | |
2987 | if (isreg32) | |
2988 | { | |
2989 | set_syntax_error (_("invalid use of 32-bit register offset")); | |
2990 | return FALSE; | |
2991 | } | |
2992 | } | |
2993 | else if (!isreg32) | |
2994 | { | |
2995 | set_syntax_error (_("invalid use of 64-bit register offset")); | |
2996 | return FALSE; | |
2997 | } | |
2998 | } | |
2999 | else | |
3000 | { | |
3001 | /* [Xn,#:<reloc_op>:<symbol> */ | |
3002 | skip_past_char (&p, '#'); | |
3003 | if (reloc && skip_past_char (&p, ':')) | |
3004 | { | |
3005 | struct reloc_table_entry *entry; | |
3006 | ||
3007 | /* Try to parse a relocation modifier. Anything else is | |
3008 | an error. */ | |
3009 | if (!(entry = find_reloc_table_entry (&p))) | |
3010 | { | |
3011 | set_syntax_error (_("unknown relocation modifier")); | |
3012 | return FALSE; | |
3013 | } | |
3014 | ||
3015 | if (entry->ldst_type == 0) | |
3016 | { | |
3017 | set_syntax_error | |
3018 | (_("this relocation modifier is not allowed on this " | |
3019 | "instruction")); | |
3020 | return FALSE; | |
3021 | } | |
3022 | ||
3023 | /* [Xn,#:<reloc_op>: */ | |
3024 | /* We now have the group relocation table entry corresponding to | |
3025 | the name in the assembler source. Next, we parse the | |
3026 | expression. */ | |
3027 | if (! my_get_expression (exp, &p, GE_NO_PREFIX, 1)) | |
3028 | { | |
3029 | set_syntax_error (_("invalid relocation expression")); | |
3030 | return FALSE; | |
3031 | } | |
3032 | ||
3033 | /* [Xn,#:<reloc_op>:<expr> */ | |
3034 | /* Record the load/store relocation type. */ | |
3035 | inst.reloc.type = entry->ldst_type; | |
3036 | inst.reloc.pc_rel = entry->pc_rel; | |
3037 | } | |
3038 | else if (! my_get_expression (exp, &p, GE_OPT_PREFIX, 1)) | |
3039 | { | |
3040 | set_syntax_error (_("invalid expression in the address")); | |
3041 | return FALSE; | |
3042 | } | |
3043 | /* [Xn,<expr> */ | |
3044 | } | |
3045 | } | |
3046 | ||
3047 | if (! skip_past_char (&p, ']')) | |
3048 | { | |
3049 | set_syntax_error (_("']' expected")); | |
3050 | return FALSE; | |
3051 | } | |
3052 | ||
3053 | if (skip_past_char (&p, '!')) | |
3054 | { | |
3055 | if (operand->addr.preind && operand->addr.offset.is_reg) | |
3056 | { | |
3057 | set_syntax_error (_("register offset not allowed in pre-indexed " | |
3058 | "addressing mode")); | |
3059 | return FALSE; | |
3060 | } | |
3061 | /* [Xn]! */ | |
3062 | operand->addr.writeback = 1; | |
3063 | } | |
3064 | else if (skip_past_comma (&p)) | |
3065 | { | |
3066 | /* [Xn], */ | |
3067 | operand->addr.postind = 1; | |
3068 | operand->addr.writeback = 1; | |
3069 | ||
3070 | if (operand->addr.preind) | |
3071 | { | |
3072 | set_syntax_error (_("cannot combine pre- and post-indexing")); | |
3073 | return FALSE; | |
3074 | } | |
3075 | ||
3076 | if (accept_reg_post_index | |
3077 | && (reg = aarch64_reg_parse_32_64 (&p, 1, 1, &isreg32, | |
3078 | &isregzero)) != PARSE_FAIL) | |
3079 | { | |
3080 | /* [Xn],Xm */ | |
3081 | if (isreg32) | |
3082 | { | |
3083 | set_syntax_error (_("invalid 32-bit register offset")); | |
3084 | return FALSE; | |
3085 | } | |
3086 | operand->addr.offset.regno = reg; | |
3087 | operand->addr.offset.is_reg = 1; | |
3088 | } | |
3089 | else if (! my_get_expression (exp, &p, GE_OPT_PREFIX, 1)) | |
3090 | { | |
3091 | /* [Xn],#expr */ | |
3092 | set_syntax_error (_("invalid expression in the address")); | |
3093 | return FALSE; | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | /* If at this point neither .preind nor .postind is set, we have a | |
3098 | bare [Rn]{!}; reject [Rn]! but accept [Rn] as a shorthand for [Rn,#0]. */ | |
3099 | if (operand->addr.preind == 0 && operand->addr.postind == 0) | |
3100 | { | |
3101 | if (operand->addr.writeback) | |
3102 | { | |
3103 | /* Reject [Rn]! */ | |
3104 | set_syntax_error (_("missing offset in the pre-indexed address")); | |
3105 | return FALSE; | |
3106 | } | |
3107 | operand->addr.preind = 1; | |
3108 | inst.reloc.exp.X_op = O_constant; | |
3109 | inst.reloc.exp.X_add_number = 0; | |
3110 | } | |
3111 | ||
3112 | *str = p; | |
3113 | return TRUE; | |
3114 | } | |
3115 | ||
3116 | /* Return TRUE on success; otherwise return FALSE. */ | |
3117 | static bfd_boolean | |
3118 | parse_address (char **str, aarch64_opnd_info *operand, | |
3119 | int accept_reg_post_index) | |
3120 | { | |
3121 | return parse_address_main (str, operand, 0, accept_reg_post_index); | |
3122 | } | |
3123 | ||
3124 | /* Return TRUE on success; otherwise return FALSE. */ | |
3125 | static bfd_boolean | |
3126 | parse_address_reloc (char **str, aarch64_opnd_info *operand) | |
3127 | { | |
3128 | return parse_address_main (str, operand, 1, 0); | |
3129 | } | |
3130 | ||
3131 | /* Parse an operand for a MOVZ, MOVN or MOVK instruction. | |
3132 | Return TRUE on success; otherwise return FALSE. */ | |
3133 | static bfd_boolean | |
3134 | parse_half (char **str, int *internal_fixup_p) | |
3135 | { | |
3136 | char *p, *saved; | |
3137 | int dummy; | |
3138 | ||
3139 | p = *str; | |
3140 | skip_past_char (&p, '#'); | |
3141 | ||
3142 | gas_assert (internal_fixup_p); | |
3143 | *internal_fixup_p = 0; | |
3144 | ||
3145 | if (*p == ':') | |
3146 | { | |
3147 | struct reloc_table_entry *entry; | |
3148 | ||
3149 | /* Try to parse a relocation. Anything else is an error. */ | |
3150 | ++p; | |
3151 | if (!(entry = find_reloc_table_entry (&p))) | |
3152 | { | |
3153 | set_syntax_error (_("unknown relocation modifier")); | |
3154 | return FALSE; | |
3155 | } | |
3156 | ||
3157 | if (entry->movw_type == 0) | |
3158 | { | |
3159 | set_syntax_error | |
3160 | (_("this relocation modifier is not allowed on this instruction")); | |
3161 | return FALSE; | |
3162 | } | |
3163 | ||
3164 | inst.reloc.type = entry->movw_type; | |
3165 | } | |
3166 | else | |
3167 | *internal_fixup_p = 1; | |
3168 | ||
3169 | /* Avoid parsing a register as a general symbol. */ | |
3170 | saved = p; | |
3171 | if (aarch64_reg_parse_32_64 (&p, 0, 0, &dummy, &dummy) != PARSE_FAIL) | |
3172 | return FALSE; | |
3173 | p = saved; | |
3174 | ||
3175 | if (! my_get_expression (&inst.reloc.exp, &p, GE_NO_PREFIX, 1)) | |
3176 | return FALSE; | |
3177 | ||
3178 | *str = p; | |
3179 | return TRUE; | |
3180 | } | |
3181 | ||
3182 | /* Parse an operand for an ADRP instruction: | |
3183 | ADRP <Xd>, <label> | |
3184 | Return TRUE on success; otherwise return FALSE. */ | |
3185 | ||
3186 | static bfd_boolean | |
3187 | parse_adrp (char **str) | |
3188 | { | |
3189 | char *p; | |
3190 | ||
3191 | p = *str; | |
3192 | if (*p == ':') | |
3193 | { | |
3194 | struct reloc_table_entry *entry; | |
3195 | ||
3196 | /* Try to parse a relocation. Anything else is an error. */ | |
3197 | ++p; | |
3198 | if (!(entry = find_reloc_table_entry (&p))) | |
3199 | { | |
3200 | set_syntax_error (_("unknown relocation modifier")); | |
3201 | return FALSE; | |
3202 | } | |
3203 | ||
3204 | if (entry->adrp_type == 0) | |
3205 | { | |
3206 | set_syntax_error | |
3207 | (_("this relocation modifier is not allowed on this instruction")); | |
3208 | return FALSE; | |
3209 | } | |
3210 | ||
3211 | inst.reloc.type = entry->adrp_type; | |
3212 | } | |
3213 | else | |
3214 | inst.reloc.type = BFD_RELOC_AARCH64_ADR_HI21_PCREL; | |
3215 | ||
3216 | inst.reloc.pc_rel = 1; | |
3217 | ||
3218 | if (! my_get_expression (&inst.reloc.exp, &p, GE_NO_PREFIX, 1)) | |
3219 | return FALSE; | |
3220 | ||
3221 | *str = p; | |
3222 | return TRUE; | |
3223 | } | |
3224 | ||
3225 | /* Miscellaneous. */ | |
3226 | ||
3227 | /* Parse an option for a preload instruction. Returns the encoding for the | |
3228 | option, or PARSE_FAIL. */ | |
3229 | ||
3230 | static int | |
3231 | parse_pldop (char **str) | |
3232 | { | |
3233 | char *p, *q; | |
3234 | const struct aarch64_name_value_pair *o; | |
3235 | ||
3236 | p = q = *str; | |
3237 | while (ISALNUM (*q)) | |
3238 | q++; | |
3239 | ||
3240 | o = hash_find_n (aarch64_pldop_hsh, p, q - p); | |
3241 | if (!o) | |
3242 | return PARSE_FAIL; | |
3243 | ||
3244 | *str = q; | |
3245 | return o->value; | |
3246 | } | |
3247 | ||
3248 | /* Parse an option for a barrier instruction. Returns the encoding for the | |
3249 | option, or PARSE_FAIL. */ | |
3250 | ||
3251 | static int | |
3252 | parse_barrier (char **str) | |
3253 | { | |
3254 | char *p, *q; | |
3255 | const asm_barrier_opt *o; | |
3256 | ||
3257 | p = q = *str; | |
3258 | while (ISALPHA (*q)) | |
3259 | q++; | |
3260 | ||
3261 | o = hash_find_n (aarch64_barrier_opt_hsh, p, q - p); | |
3262 | if (!o) | |
3263 | return PARSE_FAIL; | |
3264 | ||
3265 | *str = q; | |
3266 | return o->value; | |
3267 | } | |
3268 | ||
3269 | /* Parse a system register or a PSTATE field name for an MSR/MRS instruction. | |
a203d9b7 | 3270 | Returns the encoding for the option, or PARSE_FAIL. |
a06ea964 NC |
3271 | |
3272 | If IMPLE_DEFINED_P is non-zero, the function will also try to parse the | |
18cf6de4 | 3273 | implementation defined system register name S<op0>_<op1>_<Cn>_<Cm>_<op2>. */ |
a06ea964 NC |
3274 | |
3275 | static int | |
a203d9b7 | 3276 | parse_sys_reg (char **str, struct hash_control *sys_regs, int imple_defined_p) |
a06ea964 NC |
3277 | { |
3278 | char *p, *q; | |
3279 | char buf[32]; | |
49eec193 | 3280 | const aarch64_sys_reg *o; |
a06ea964 NC |
3281 | int value; |
3282 | ||
3283 | p = buf; | |
3284 | for (q = *str; ISALNUM (*q) || *q == '_'; q++) | |
3285 | if (p < buf + 31) | |
3286 | *p++ = TOLOWER (*q); | |
3287 | *p = '\0'; | |
3288 | /* Assert that BUF be large enough. */ | |
3289 | gas_assert (p - buf == q - *str); | |
3290 | ||
3291 | o = hash_find (sys_regs, buf); | |
3292 | if (!o) | |
3293 | { | |
3294 | if (!imple_defined_p) | |
3295 | return PARSE_FAIL; | |
3296 | else | |
3297 | { | |
18cf6de4 | 3298 | /* Parse S<op0>_<op1>_<Cn>_<Cm>_<op2>, the implementation defined |
a06ea964 NC |
3299 | registers. */ |
3300 | unsigned int op0, op1, cn, cm, op2; | |
3301 | if (sscanf (buf, "s%u_%u_c%u_c%u_%u", &op0, &op1, &cn, &cm, &op2) != 5) | |
3302 | return PARSE_FAIL; | |
aeebdd9b YZ |
3303 | /* The architecture specifies the encoding space for implementation |
3304 | defined registers as: | |
a06ea964 | 3305 | op0 op1 CRn CRm op2 |
18cf6de4 | 3306 | 1x xxx 1x11 xxxx xxx |
aeebdd9b YZ |
3307 | For convenience GAS accepts a wider encoding space, as follows: |
3308 | op0 op1 CRn CRm op2 | |
18cf6de4 YZ |
3309 | 1x xxx xxxx xxxx xxx */ |
3310 | if ((op0 != 2 && op0 != 3) || op1 > 7 || cn > 15 || cm > 15 || op2 > 7) | |
a06ea964 NC |
3311 | return PARSE_FAIL; |
3312 | value = (op0 << 14) | (op1 << 11) | (cn << 7) | (cm << 3) | op2; | |
3313 | } | |
3314 | } | |
3315 | else | |
49eec193 | 3316 | { |
9a73e520 | 3317 | if (aarch64_sys_reg_deprecated_p (o)) |
49eec193 YZ |
3318 | as_warn (_("system register name '%s' is deprecated and may be " |
3319 | "removed in a future release"), buf); | |
3320 | value = o->value; | |
3321 | } | |
a06ea964 NC |
3322 | |
3323 | *str = q; | |
3324 | return value; | |
3325 | } | |
3326 | ||
3327 | /* Parse a system reg for ic/dc/at/tlbi instructions. Returns the table entry | |
3328 | for the option, or NULL. */ | |
3329 | ||
3330 | static const aarch64_sys_ins_reg * | |
3331 | parse_sys_ins_reg (char **str, struct hash_control *sys_ins_regs) | |
3332 | { | |
3333 | char *p, *q; | |
3334 | char buf[32]; | |
3335 | const aarch64_sys_ins_reg *o; | |
3336 | ||
3337 | p = buf; | |
3338 | for (q = *str; ISALNUM (*q) || *q == '_'; q++) | |
3339 | if (p < buf + 31) | |
3340 | *p++ = TOLOWER (*q); | |
3341 | *p = '\0'; | |
3342 | ||
3343 | o = hash_find (sys_ins_regs, buf); | |
3344 | if (!o) | |
3345 | return NULL; | |
3346 | ||
3347 | *str = q; | |
3348 | return o; | |
3349 | } | |
3350 | \f | |
3351 | #define po_char_or_fail(chr) do { \ | |
3352 | if (! skip_past_char (&str, chr)) \ | |
3353 | goto failure; \ | |
3354 | } while (0) | |
3355 | ||
3356 | #define po_reg_or_fail(regtype) do { \ | |
3357 | val = aarch64_reg_parse (&str, regtype, &rtype, NULL); \ | |
3358 | if (val == PARSE_FAIL) \ | |
3359 | { \ | |
3360 | set_default_error (); \ | |
3361 | goto failure; \ | |
3362 | } \ | |
3363 | } while (0) | |
3364 | ||
3365 | #define po_int_reg_or_fail(reject_sp, reject_rz) do { \ | |
3366 | val = aarch64_reg_parse_32_64 (&str, reject_sp, reject_rz, \ | |
3367 | &isreg32, &isregzero); \ | |
3368 | if (val == PARSE_FAIL) \ | |
3369 | { \ | |
3370 | set_default_error (); \ | |
3371 | goto failure; \ | |
3372 | } \ | |
3373 | info->reg.regno = val; \ | |
3374 | if (isreg32) \ | |
3375 | info->qualifier = AARCH64_OPND_QLF_W; \ | |
3376 | else \ | |
3377 | info->qualifier = AARCH64_OPND_QLF_X; \ | |
3378 | } while (0) | |
3379 | ||
3380 | #define po_imm_nc_or_fail() do { \ | |
3381 | if (! parse_constant_immediate (&str, &val)) \ | |
3382 | goto failure; \ | |
3383 | } while (0) | |
3384 | ||
3385 | #define po_imm_or_fail(min, max) do { \ | |
3386 | if (! parse_constant_immediate (&str, &val)) \ | |
3387 | goto failure; \ | |
3388 | if (val < min || val > max) \ | |
3389 | { \ | |
3390 | set_fatal_syntax_error (_("immediate value out of range "\ | |
3391 | #min " to "#max)); \ | |
3392 | goto failure; \ | |
3393 | } \ | |
3394 | } while (0) | |
3395 | ||
3396 | #define po_misc_or_fail(expr) do { \ | |
3397 | if (!expr) \ | |
3398 | goto failure; \ | |
3399 | } while (0) | |
3400 | \f | |
3401 | /* encode the 12-bit imm field of Add/sub immediate */ | |
3402 | static inline uint32_t | |
3403 | encode_addsub_imm (uint32_t imm) | |
3404 | { | |
3405 | return imm << 10; | |
3406 | } | |
3407 | ||
3408 | /* encode the shift amount field of Add/sub immediate */ | |
3409 | static inline uint32_t | |
3410 | encode_addsub_imm_shift_amount (uint32_t cnt) | |
3411 | { | |
3412 | return cnt << 22; | |
3413 | } | |
3414 | ||
3415 | ||
3416 | /* encode the imm field of Adr instruction */ | |
3417 | static inline uint32_t | |
3418 | encode_adr_imm (uint32_t imm) | |
3419 | { | |
3420 | return (((imm & 0x3) << 29) /* [1:0] -> [30:29] */ | |
3421 | | ((imm & (0x7ffff << 2)) << 3)); /* [20:2] -> [23:5] */ | |
3422 | } | |
3423 | ||
3424 | /* encode the immediate field of Move wide immediate */ | |
3425 | static inline uint32_t | |
3426 | encode_movw_imm (uint32_t imm) | |
3427 | { | |
3428 | return imm << 5; | |
3429 | } | |
3430 | ||
3431 | /* encode the 26-bit offset of unconditional branch */ | |
3432 | static inline uint32_t | |
3433 | encode_branch_ofs_26 (uint32_t ofs) | |
3434 | { | |
3435 | return ofs & ((1 << 26) - 1); | |
3436 | } | |
3437 | ||
3438 | /* encode the 19-bit offset of conditional branch and compare & branch */ | |
3439 | static inline uint32_t | |
3440 | encode_cond_branch_ofs_19 (uint32_t ofs) | |
3441 | { | |
3442 | return (ofs & ((1 << 19) - 1)) << 5; | |
3443 | } | |
3444 | ||
3445 | /* encode the 19-bit offset of ld literal */ | |
3446 | static inline uint32_t | |
3447 | encode_ld_lit_ofs_19 (uint32_t ofs) | |
3448 | { | |
3449 | return (ofs & ((1 << 19) - 1)) << 5; | |
3450 | } | |
3451 | ||
3452 | /* Encode the 14-bit offset of test & branch. */ | |
3453 | static inline uint32_t | |
3454 | encode_tst_branch_ofs_14 (uint32_t ofs) | |
3455 | { | |
3456 | return (ofs & ((1 << 14) - 1)) << 5; | |
3457 | } | |
3458 | ||
3459 | /* Encode the 16-bit imm field of svc/hvc/smc. */ | |
3460 | static inline uint32_t | |
3461 | encode_svc_imm (uint32_t imm) | |
3462 | { | |
3463 | return imm << 5; | |
3464 | } | |
3465 | ||
3466 | /* Reencode add(s) to sub(s), or sub(s) to add(s). */ | |
3467 | static inline uint32_t | |
3468 | reencode_addsub_switch_add_sub (uint32_t opcode) | |
3469 | { | |
3470 | return opcode ^ (1 << 30); | |
3471 | } | |
3472 | ||
3473 | static inline uint32_t | |
3474 | reencode_movzn_to_movz (uint32_t opcode) | |
3475 | { | |
3476 | return opcode | (1 << 30); | |
3477 | } | |
3478 | ||
3479 | static inline uint32_t | |
3480 | reencode_movzn_to_movn (uint32_t opcode) | |
3481 | { | |
3482 | return opcode & ~(1 << 30); | |
3483 | } | |
3484 | ||
3485 | /* Overall per-instruction processing. */ | |
3486 | ||
3487 | /* We need to be able to fix up arbitrary expressions in some statements. | |
3488 | This is so that we can handle symbols that are an arbitrary distance from | |
3489 | the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask), | |
3490 | which returns part of an address in a form which will be valid for | |
3491 | a data instruction. We do this by pushing the expression into a symbol | |
3492 | in the expr_section, and creating a fix for that. */ | |
3493 | ||
3494 | static fixS * | |
3495 | fix_new_aarch64 (fragS * frag, | |
3496 | int where, | |
3497 | short int size, expressionS * exp, int pc_rel, int reloc) | |
3498 | { | |
3499 | fixS *new_fix; | |
3500 | ||
3501 | switch (exp->X_op) | |
3502 | { | |
3503 | case O_constant: | |
3504 | case O_symbol: | |
3505 | case O_add: | |
3506 | case O_subtract: | |
3507 | new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc); | |
3508 | break; | |
3509 | ||
3510 | default: | |
3511 | new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0, | |
3512 | pc_rel, reloc); | |
3513 | break; | |
3514 | } | |
3515 | return new_fix; | |
3516 | } | |
3517 | \f | |
3518 | /* Diagnostics on operands errors. */ | |
3519 | ||
3520 | /* By default, output one-line error message only. | |
3521 | Enable the verbose error message by -merror-verbose. */ | |
3522 | static int verbose_error_p = 0; | |
3523 | ||
3524 | #ifdef DEBUG_AARCH64 | |
3525 | /* N.B. this is only for the purpose of debugging. */ | |
3526 | const char* operand_mismatch_kind_names[] = | |
3527 | { | |
3528 | "AARCH64_OPDE_NIL", | |
3529 | "AARCH64_OPDE_RECOVERABLE", | |
3530 | "AARCH64_OPDE_SYNTAX_ERROR", | |
3531 | "AARCH64_OPDE_FATAL_SYNTAX_ERROR", | |
3532 | "AARCH64_OPDE_INVALID_VARIANT", | |
3533 | "AARCH64_OPDE_OUT_OF_RANGE", | |
3534 | "AARCH64_OPDE_UNALIGNED", | |
3535 | "AARCH64_OPDE_REG_LIST", | |
3536 | "AARCH64_OPDE_OTHER_ERROR", | |
3537 | }; | |
3538 | #endif /* DEBUG_AARCH64 */ | |
3539 | ||
3540 | /* Return TRUE if LHS is of higher severity than RHS, otherwise return FALSE. | |
3541 | ||
3542 | When multiple errors of different kinds are found in the same assembly | |
3543 | line, only the error of the highest severity will be picked up for | |
3544 | issuing the diagnostics. */ | |
3545 | ||
3546 | static inline bfd_boolean | |
3547 | operand_error_higher_severity_p (enum aarch64_operand_error_kind lhs, | |
3548 | enum aarch64_operand_error_kind rhs) | |
3549 | { | |
3550 | gas_assert (AARCH64_OPDE_RECOVERABLE > AARCH64_OPDE_NIL); | |
3551 | gas_assert (AARCH64_OPDE_SYNTAX_ERROR > AARCH64_OPDE_RECOVERABLE); | |
3552 | gas_assert (AARCH64_OPDE_FATAL_SYNTAX_ERROR > AARCH64_OPDE_SYNTAX_ERROR); | |
3553 | gas_assert (AARCH64_OPDE_INVALID_VARIANT > AARCH64_OPDE_FATAL_SYNTAX_ERROR); | |
3554 | gas_assert (AARCH64_OPDE_OUT_OF_RANGE > AARCH64_OPDE_INVALID_VARIANT); | |
3555 | gas_assert (AARCH64_OPDE_UNALIGNED > AARCH64_OPDE_OUT_OF_RANGE); | |
3556 | gas_assert (AARCH64_OPDE_REG_LIST > AARCH64_OPDE_UNALIGNED); | |
3557 | gas_assert (AARCH64_OPDE_OTHER_ERROR > AARCH64_OPDE_REG_LIST); | |
3558 | return lhs > rhs; | |
3559 | } | |
3560 | ||
3561 | /* Helper routine to get the mnemonic name from the assembly instruction | |
3562 | line; should only be called for the diagnosis purpose, as there is | |
3563 | string copy operation involved, which may affect the runtime | |
3564 | performance if used in elsewhere. */ | |
3565 | ||
3566 | static const char* | |
3567 | get_mnemonic_name (const char *str) | |
3568 | { | |
3569 | static char mnemonic[32]; | |
3570 | char *ptr; | |
3571 | ||
3572 | /* Get the first 15 bytes and assume that the full name is included. */ | |
3573 | strncpy (mnemonic, str, 31); | |
3574 | mnemonic[31] = '\0'; | |
3575 | ||
3576 | /* Scan up to the end of the mnemonic, which must end in white space, | |
3577 | '.', or end of string. */ | |
3578 | for (ptr = mnemonic; is_part_of_name(*ptr); ++ptr) | |
3579 | ; | |
3580 | ||
3581 | *ptr = '\0'; | |
3582 | ||
3583 | /* Append '...' to the truncated long name. */ | |
3584 | if (ptr - mnemonic == 31) | |
3585 | mnemonic[28] = mnemonic[29] = mnemonic[30] = '.'; | |
3586 | ||
3587 | return mnemonic; | |
3588 | } | |
3589 | ||
3590 | static void | |
3591 | reset_aarch64_instruction (aarch64_instruction *instruction) | |
3592 | { | |
3593 | memset (instruction, '\0', sizeof (aarch64_instruction)); | |
3594 | instruction->reloc.type = BFD_RELOC_UNUSED; | |
3595 | } | |
3596 | ||
3597 | /* Data strutures storing one user error in the assembly code related to | |
3598 | operands. */ | |
3599 | ||
3600 | struct operand_error_record | |
3601 | { | |
3602 | const aarch64_opcode *opcode; | |
3603 | aarch64_operand_error detail; | |
3604 | struct operand_error_record *next; | |
3605 | }; | |
3606 | ||
3607 | typedef struct operand_error_record operand_error_record; | |
3608 | ||
3609 | struct operand_errors | |
3610 | { | |
3611 | operand_error_record *head; | |
3612 | operand_error_record *tail; | |
3613 | }; | |
3614 | ||
3615 | typedef struct operand_errors operand_errors; | |
3616 | ||
3617 | /* Top-level data structure reporting user errors for the current line of | |
3618 | the assembly code. | |
3619 | The way md_assemble works is that all opcodes sharing the same mnemonic | |
3620 | name are iterated to find a match to the assembly line. In this data | |
3621 | structure, each of the such opcodes will have one operand_error_record | |
3622 | allocated and inserted. In other words, excessive errors related with | |
3623 | a single opcode are disregarded. */ | |
3624 | operand_errors operand_error_report; | |
3625 | ||
3626 | /* Free record nodes. */ | |
3627 | static operand_error_record *free_opnd_error_record_nodes = NULL; | |
3628 | ||
3629 | /* Initialize the data structure that stores the operand mismatch | |
3630 | information on assembling one line of the assembly code. */ | |
3631 | static void | |
3632 | init_operand_error_report (void) | |
3633 | { | |
3634 | if (operand_error_report.head != NULL) | |
3635 | { | |
3636 | gas_assert (operand_error_report.tail != NULL); | |
3637 | operand_error_report.tail->next = free_opnd_error_record_nodes; | |
3638 | free_opnd_error_record_nodes = operand_error_report.head; | |
3639 | operand_error_report.head = NULL; | |
3640 | operand_error_report.tail = NULL; | |
3641 | return; | |
3642 | } | |
3643 | gas_assert (operand_error_report.tail == NULL); | |
3644 | } | |
3645 | ||
3646 | /* Return TRUE if some operand error has been recorded during the | |
3647 | parsing of the current assembly line using the opcode *OPCODE; | |
3648 | otherwise return FALSE. */ | |
3649 | static inline bfd_boolean | |
3650 | opcode_has_operand_error_p (const aarch64_opcode *opcode) | |
3651 | { | |
3652 | operand_error_record *record = operand_error_report.head; | |
3653 | return record && record->opcode == opcode; | |
3654 | } | |
3655 | ||
3656 | /* Add the error record *NEW_RECORD to operand_error_report. The record's | |
3657 | OPCODE field is initialized with OPCODE. | |
3658 | N.B. only one record for each opcode, i.e. the maximum of one error is | |
3659 | recorded for each instruction template. */ | |
3660 | ||
3661 | static void | |
3662 | add_operand_error_record (const operand_error_record* new_record) | |
3663 | { | |
3664 | const aarch64_opcode *opcode = new_record->opcode; | |
3665 | operand_error_record* record = operand_error_report.head; | |
3666 | ||
3667 | /* The record may have been created for this opcode. If not, we need | |
3668 | to prepare one. */ | |
3669 | if (! opcode_has_operand_error_p (opcode)) | |
3670 | { | |
3671 | /* Get one empty record. */ | |
3672 | if (free_opnd_error_record_nodes == NULL) | |
3673 | { | |
3674 | record = xmalloc (sizeof (operand_error_record)); | |
3675 | if (record == NULL) | |
3676 | abort (); | |
3677 | } | |
3678 | else | |
3679 | { | |
3680 | record = free_opnd_error_record_nodes; | |
3681 | free_opnd_error_record_nodes = record->next; | |
3682 | } | |
3683 | record->opcode = opcode; | |
3684 | /* Insert at the head. */ | |
3685 | record->next = operand_error_report.head; | |
3686 | operand_error_report.head = record; | |
3687 | if (operand_error_report.tail == NULL) | |
3688 | operand_error_report.tail = record; | |
3689 | } | |
3690 | else if (record->detail.kind != AARCH64_OPDE_NIL | |
3691 | && record->detail.index <= new_record->detail.index | |
3692 | && operand_error_higher_severity_p (record->detail.kind, | |
3693 | new_record->detail.kind)) | |
3694 | { | |
3695 | /* In the case of multiple errors found on operands related with a | |
3696 | single opcode, only record the error of the leftmost operand and | |
3697 | only if the error is of higher severity. */ | |
3698 | DEBUG_TRACE ("error %s on operand %d not added to the report due to" | |
3699 | " the existing error %s on operand %d", | |
3700 | operand_mismatch_kind_names[new_record->detail.kind], | |
3701 | new_record->detail.index, | |
3702 | operand_mismatch_kind_names[record->detail.kind], | |
3703 | record->detail.index); | |
3704 | return; | |
3705 | } | |
3706 | ||
3707 | record->detail = new_record->detail; | |
3708 | } | |
3709 | ||
3710 | static inline void | |
3711 | record_operand_error_info (const aarch64_opcode *opcode, | |
3712 | aarch64_operand_error *error_info) | |
3713 | { | |
3714 | operand_error_record record; | |
3715 | record.opcode = opcode; | |
3716 | record.detail = *error_info; | |
3717 | add_operand_error_record (&record); | |
3718 | } | |
3719 | ||
3720 | /* Record an error of kind KIND and, if ERROR is not NULL, of the detailed | |
3721 | error message *ERROR, for operand IDX (count from 0). */ | |
3722 | ||
3723 | static void | |
3724 | record_operand_error (const aarch64_opcode *opcode, int idx, | |
3725 | enum aarch64_operand_error_kind kind, | |
3726 | const char* error) | |
3727 | { | |
3728 | aarch64_operand_error info; | |
3729 | memset(&info, 0, sizeof (info)); | |
3730 | info.index = idx; | |
3731 | info.kind = kind; | |
3732 | info.error = error; | |
3733 | record_operand_error_info (opcode, &info); | |
3734 | } | |
3735 | ||
3736 | static void | |
3737 | record_operand_error_with_data (const aarch64_opcode *opcode, int idx, | |
3738 | enum aarch64_operand_error_kind kind, | |
3739 | const char* error, const int *extra_data) | |
3740 | { | |
3741 | aarch64_operand_error info; | |
3742 | info.index = idx; | |
3743 | info.kind = kind; | |
3744 | info.error = error; | |
3745 | info.data[0] = extra_data[0]; | |
3746 | info.data[1] = extra_data[1]; | |
3747 | info.data[2] = extra_data[2]; | |
3748 | record_operand_error_info (opcode, &info); | |
3749 | } | |
3750 | ||
3751 | static void | |
3752 | record_operand_out_of_range_error (const aarch64_opcode *opcode, int idx, | |
3753 | const char* error, int lower_bound, | |
3754 | int upper_bound) | |
3755 | { | |
3756 | int data[3] = {lower_bound, upper_bound, 0}; | |
3757 | record_operand_error_with_data (opcode, idx, AARCH64_OPDE_OUT_OF_RANGE, | |
3758 | error, data); | |
3759 | } | |
3760 | ||
3761 | /* Remove the operand error record for *OPCODE. */ | |
3762 | static void ATTRIBUTE_UNUSED | |
3763 | remove_operand_error_record (const aarch64_opcode *opcode) | |
3764 | { | |
3765 | if (opcode_has_operand_error_p (opcode)) | |
3766 | { | |
3767 | operand_error_record* record = operand_error_report.head; | |
3768 | gas_assert (record != NULL && operand_error_report.tail != NULL); | |
3769 | operand_error_report.head = record->next; | |
3770 | record->next = free_opnd_error_record_nodes; | |
3771 | free_opnd_error_record_nodes = record; | |
3772 | if (operand_error_report.head == NULL) | |
3773 | { | |
3774 | gas_assert (operand_error_report.tail == record); | |
3775 | operand_error_report.tail = NULL; | |
3776 | } | |
3777 | } | |
3778 | } | |
3779 | ||
3780 | /* Given the instruction in *INSTR, return the index of the best matched | |
3781 | qualifier sequence in the list (an array) headed by QUALIFIERS_LIST. | |
3782 | ||
3783 | Return -1 if there is no qualifier sequence; return the first match | |
3784 | if there is multiple matches found. */ | |
3785 | ||
3786 | static int | |
3787 | find_best_match (const aarch64_inst *instr, | |
3788 | const aarch64_opnd_qualifier_seq_t *qualifiers_list) | |
3789 | { | |
3790 | int i, num_opnds, max_num_matched, idx; | |
3791 | ||
3792 | num_opnds = aarch64_num_of_operands (instr->opcode); | |
3793 | if (num_opnds == 0) | |
3794 | { | |
3795 | DEBUG_TRACE ("no operand"); | |
3796 | return -1; | |
3797 | } | |
3798 | ||
3799 | max_num_matched = 0; | |
3800 | idx = -1; | |
3801 | ||
3802 | /* For each pattern. */ | |
3803 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i, ++qualifiers_list) | |
3804 | { | |
3805 | int j, num_matched; | |
3806 | const aarch64_opnd_qualifier_t *qualifiers = *qualifiers_list; | |
3807 | ||
3808 | /* Most opcodes has much fewer patterns in the list. */ | |
3809 | if (empty_qualifier_sequence_p (qualifiers) == TRUE) | |
3810 | { | |
3811 | DEBUG_TRACE_IF (i == 0, "empty list of qualifier sequence"); | |
3812 | if (i != 0 && idx == -1) | |
3813 | /* If nothing has been matched, return the 1st sequence. */ | |
3814 | idx = 0; | |
3815 | break; | |
3816 | } | |
3817 | ||
3818 | for (j = 0, num_matched = 0; j < num_opnds; ++j, ++qualifiers) | |
3819 | if (*qualifiers == instr->operands[j].qualifier) | |
3820 | ++num_matched; | |
3821 | ||
3822 | if (num_matched > max_num_matched) | |
3823 | { | |
3824 | max_num_matched = num_matched; | |
3825 | idx = i; | |
3826 | } | |
3827 | } | |
3828 | ||
3829 | DEBUG_TRACE ("return with %d", idx); | |
3830 | return idx; | |
3831 | } | |
3832 | ||
3833 | /* Assign qualifiers in the qualifier seqence (headed by QUALIFIERS) to the | |
3834 | corresponding operands in *INSTR. */ | |
3835 | ||
3836 | static inline void | |
3837 | assign_qualifier_sequence (aarch64_inst *instr, | |
3838 | const aarch64_opnd_qualifier_t *qualifiers) | |
3839 | { | |
3840 | int i = 0; | |
3841 | int num_opnds = aarch64_num_of_operands (instr->opcode); | |
3842 | gas_assert (num_opnds); | |
3843 | for (i = 0; i < num_opnds; ++i, ++qualifiers) | |
3844 | instr->operands[i].qualifier = *qualifiers; | |
3845 | } | |
3846 | ||
3847 | /* Print operands for the diagnosis purpose. */ | |
3848 | ||
3849 | static void | |
3850 | print_operands (char *buf, const aarch64_opcode *opcode, | |
3851 | const aarch64_opnd_info *opnds) | |
3852 | { | |
3853 | int i; | |
3854 | ||
3855 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3856 | { | |
3857 | const size_t size = 128; | |
3858 | char str[size]; | |
3859 | ||
3860 | /* We regard the opcode operand info more, however we also look into | |
3861 | the inst->operands to support the disassembling of the optional | |
3862 | operand. | |
3863 | The two operand code should be the same in all cases, apart from | |
3864 | when the operand can be optional. */ | |
3865 | if (opcode->operands[i] == AARCH64_OPND_NIL | |
3866 | || opnds[i].type == AARCH64_OPND_NIL) | |
3867 | break; | |
3868 | ||
3869 | /* Generate the operand string in STR. */ | |
3870 | aarch64_print_operand (str, size, 0, opcode, opnds, i, NULL, NULL); | |
3871 | ||
3872 | /* Delimiter. */ | |
3873 | if (str[0] != '\0') | |
3874 | strcat (buf, i == 0 ? " " : ","); | |
3875 | ||
3876 | /* Append the operand string. */ | |
3877 | strcat (buf, str); | |
3878 | } | |
3879 | } | |
3880 | ||
3881 | /* Send to stderr a string as information. */ | |
3882 | ||
3883 | static void | |
3884 | output_info (const char *format, ...) | |
3885 | { | |
3886 | char *file; | |
3887 | unsigned int line; | |
3888 | va_list args; | |
3889 | ||
3890 | as_where (&file, &line); | |
3891 | if (file) | |
3892 | { | |
3893 | if (line != 0) | |
3894 | fprintf (stderr, "%s:%u: ", file, line); | |
3895 | else | |
3896 | fprintf (stderr, "%s: ", file); | |
3897 | } | |
3898 | fprintf (stderr, _("Info: ")); | |
3899 | va_start (args, format); | |
3900 | vfprintf (stderr, format, args); | |
3901 | va_end (args); | |
3902 | (void) putc ('\n', stderr); | |
3903 | } | |
3904 | ||
3905 | /* Output one operand error record. */ | |
3906 | ||
3907 | static void | |
3908 | output_operand_error_record (const operand_error_record *record, char *str) | |
3909 | { | |
3910 | int idx = record->detail.index; | |
3911 | const aarch64_opcode *opcode = record->opcode; | |
3912 | enum aarch64_opnd opd_code = (idx != -1 ? opcode->operands[idx] | |
3913 | : AARCH64_OPND_NIL); | |
3914 | const aarch64_operand_error *detail = &record->detail; | |
3915 | ||
3916 | switch (detail->kind) | |
3917 | { | |
3918 | case AARCH64_OPDE_NIL: | |
3919 | gas_assert (0); | |
3920 | break; | |
3921 | ||
3922 | case AARCH64_OPDE_SYNTAX_ERROR: | |
3923 | case AARCH64_OPDE_RECOVERABLE: | |
3924 | case AARCH64_OPDE_FATAL_SYNTAX_ERROR: | |
3925 | case AARCH64_OPDE_OTHER_ERROR: | |
3926 | gas_assert (idx >= 0); | |
3927 | /* Use the prepared error message if there is, otherwise use the | |
3928 | operand description string to describe the error. */ | |
3929 | if (detail->error != NULL) | |
3930 | { | |
3931 | if (detail->index == -1) | |
3932 | as_bad (_("%s -- `%s'"), detail->error, str); | |
3933 | else | |
3934 | as_bad (_("%s at operand %d -- `%s'"), | |
3935 | detail->error, detail->index + 1, str); | |
3936 | } | |
3937 | else | |
3938 | as_bad (_("operand %d should be %s -- `%s'"), idx + 1, | |
3939 | aarch64_get_operand_desc (opd_code), str); | |
3940 | break; | |
3941 | ||
3942 | case AARCH64_OPDE_INVALID_VARIANT: | |
3943 | as_bad (_("operand mismatch -- `%s'"), str); | |
3944 | if (verbose_error_p) | |
3945 | { | |
3946 | /* We will try to correct the erroneous instruction and also provide | |
3947 | more information e.g. all other valid variants. | |
3948 | ||
3949 | The string representation of the corrected instruction and other | |
3950 | valid variants are generated by | |
3951 | ||
3952 | 1) obtaining the intermediate representation of the erroneous | |
3953 | instruction; | |
3954 | 2) manipulating the IR, e.g. replacing the operand qualifier; | |
3955 | 3) printing out the instruction by calling the printer functions | |
3956 | shared with the disassembler. | |
3957 | ||
3958 | The limitation of this method is that the exact input assembly | |
3959 | line cannot be accurately reproduced in some cases, for example an | |
3960 | optional operand present in the actual assembly line will be | |
3961 | omitted in the output; likewise for the optional syntax rules, | |
3962 | e.g. the # before the immediate. Another limitation is that the | |
3963 | assembly symbols and relocation operations in the assembly line | |
3964 | currently cannot be printed out in the error report. Last but not | |
3965 | least, when there is other error(s) co-exist with this error, the | |
3966 | 'corrected' instruction may be still incorrect, e.g. given | |
3967 | 'ldnp h0,h1,[x0,#6]!' | |
3968 | this diagnosis will provide the version: | |
3969 | 'ldnp s0,s1,[x0,#6]!' | |
3970 | which is still not right. */ | |
3971 | size_t len = strlen (get_mnemonic_name (str)); | |
3972 | int i, qlf_idx; | |
3973 | bfd_boolean result; | |
3974 | const size_t size = 2048; | |
3975 | char buf[size]; | |
3976 | aarch64_inst *inst_base = &inst.base; | |
3977 | const aarch64_opnd_qualifier_seq_t *qualifiers_list; | |
3978 | ||
3979 | /* Init inst. */ | |
3980 | reset_aarch64_instruction (&inst); | |
3981 | inst_base->opcode = opcode; | |
3982 | ||
3983 | /* Reset the error report so that there is no side effect on the | |
3984 | following operand parsing. */ | |
3985 | init_operand_error_report (); | |
3986 | ||
3987 | /* Fill inst. */ | |
3988 | result = parse_operands (str + len, opcode) | |
3989 | && programmer_friendly_fixup (&inst); | |
3990 | gas_assert (result); | |
3991 | result = aarch64_opcode_encode (opcode, inst_base, &inst_base->value, | |
3992 | NULL, NULL); | |
3993 | gas_assert (!result); | |
3994 | ||
3995 | /* Find the most matched qualifier sequence. */ | |
3996 | qlf_idx = find_best_match (inst_base, opcode->qualifiers_list); | |
3997 | gas_assert (qlf_idx > -1); | |
3998 | ||
3999 | /* Assign the qualifiers. */ | |
4000 | assign_qualifier_sequence (inst_base, | |
4001 | opcode->qualifiers_list[qlf_idx]); | |
4002 | ||
4003 | /* Print the hint. */ | |
4004 | output_info (_(" did you mean this?")); | |
4005 | snprintf (buf, size, "\t%s", get_mnemonic_name (str)); | |
4006 | print_operands (buf, opcode, inst_base->operands); | |
4007 | output_info (_(" %s"), buf); | |
4008 | ||
4009 | /* Print out other variant(s) if there is any. */ | |
4010 | if (qlf_idx != 0 || | |
4011 | !empty_qualifier_sequence_p (opcode->qualifiers_list[1])) | |
4012 | output_info (_(" other valid variant(s):")); | |
4013 | ||
4014 | /* For each pattern. */ | |
4015 | qualifiers_list = opcode->qualifiers_list; | |
4016 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i, ++qualifiers_list) | |
4017 | { | |
4018 | /* Most opcodes has much fewer patterns in the list. | |
4019 | First NIL qualifier indicates the end in the list. */ | |
4020 | if (empty_qualifier_sequence_p (*qualifiers_list) == TRUE) | |
4021 | break; | |
4022 | ||
4023 | if (i != qlf_idx) | |
4024 | { | |
4025 | /* Mnemonics name. */ | |
4026 | snprintf (buf, size, "\t%s", get_mnemonic_name (str)); | |
4027 | ||
4028 | /* Assign the qualifiers. */ | |
4029 | assign_qualifier_sequence (inst_base, *qualifiers_list); | |
4030 | ||
4031 | /* Print instruction. */ | |
4032 | print_operands (buf, opcode, inst_base->operands); | |
4033 | ||
4034 | output_info (_(" %s"), buf); | |
4035 | } | |
4036 | } | |
4037 | } | |
4038 | break; | |
4039 | ||
4040 | case AARCH64_OPDE_OUT_OF_RANGE: | |
f5555712 YZ |
4041 | if (detail->data[0] != detail->data[1]) |
4042 | as_bad (_("%s out of range %d to %d at operand %d -- `%s'"), | |
4043 | detail->error ? detail->error : _("immediate value"), | |
4044 | detail->data[0], detail->data[1], detail->index + 1, str); | |
4045 | else | |
4046 | as_bad (_("%s expected to be %d at operand %d -- `%s'"), | |
4047 | detail->error ? detail->error : _("immediate value"), | |
4048 | detail->data[0], detail->index + 1, str); | |
a06ea964 NC |
4049 | break; |
4050 | ||
4051 | case AARCH64_OPDE_REG_LIST: | |
4052 | if (detail->data[0] == 1) | |
4053 | as_bad (_("invalid number of registers in the list; " | |
4054 | "only 1 register is expected at operand %d -- `%s'"), | |
4055 | detail->index + 1, str); | |
4056 | else | |
4057 | as_bad (_("invalid number of registers in the list; " | |
4058 | "%d registers are expected at operand %d -- `%s'"), | |
4059 | detail->data[0], detail->index + 1, str); | |
4060 | break; | |
4061 | ||
4062 | case AARCH64_OPDE_UNALIGNED: | |
4063 | as_bad (_("immediate value should be a multiple of " | |
4064 | "%d at operand %d -- `%s'"), | |
4065 | detail->data[0], detail->index + 1, str); | |
4066 | break; | |
4067 | ||
4068 | default: | |
4069 | gas_assert (0); | |
4070 | break; | |
4071 | } | |
4072 | } | |
4073 | ||
4074 | /* Process and output the error message about the operand mismatching. | |
4075 | ||
4076 | When this function is called, the operand error information had | |
4077 | been collected for an assembly line and there will be multiple | |
4078 | errors in the case of mulitple instruction templates; output the | |
4079 | error message that most closely describes the problem. */ | |
4080 | ||
4081 | static void | |
4082 | output_operand_error_report (char *str) | |
4083 | { | |
4084 | int largest_error_pos; | |
4085 | const char *msg = NULL; | |
4086 | enum aarch64_operand_error_kind kind; | |
4087 | operand_error_record *curr; | |
4088 | operand_error_record *head = operand_error_report.head; | |
4089 | operand_error_record *record = NULL; | |
4090 | ||
4091 | /* No error to report. */ | |
4092 | if (head == NULL) | |
4093 | return; | |
4094 | ||
4095 | gas_assert (head != NULL && operand_error_report.tail != NULL); | |
4096 | ||
4097 | /* Only one error. */ | |
4098 | if (head == operand_error_report.tail) | |
4099 | { | |
4100 | DEBUG_TRACE ("single opcode entry with error kind: %s", | |
4101 | operand_mismatch_kind_names[head->detail.kind]); | |
4102 | output_operand_error_record (head, str); | |
4103 | return; | |
4104 | } | |
4105 | ||
4106 | /* Find the error kind of the highest severity. */ | |
4107 | DEBUG_TRACE ("multiple opcode entres with error kind"); | |
4108 | kind = AARCH64_OPDE_NIL; | |
4109 | for (curr = head; curr != NULL; curr = curr->next) | |
4110 | { | |
4111 | gas_assert (curr->detail.kind != AARCH64_OPDE_NIL); | |
4112 | DEBUG_TRACE ("\t%s", operand_mismatch_kind_names[curr->detail.kind]); | |
4113 | if (operand_error_higher_severity_p (curr->detail.kind, kind)) | |
4114 | kind = curr->detail.kind; | |
4115 | } | |
4116 | gas_assert (kind != AARCH64_OPDE_NIL); | |
4117 | ||
4118 | /* Pick up one of errors of KIND to report. */ | |
4119 | largest_error_pos = -2; /* Index can be -1 which means unknown index. */ | |
4120 | for (curr = head; curr != NULL; curr = curr->next) | |
4121 | { | |
4122 | if (curr->detail.kind != kind) | |
4123 | continue; | |
4124 | /* If there are multiple errors, pick up the one with the highest | |
4125 | mismatching operand index. In the case of multiple errors with | |
4126 | the equally highest operand index, pick up the first one or the | |
4127 | first one with non-NULL error message. */ | |
4128 | if (curr->detail.index > largest_error_pos | |
4129 | || (curr->detail.index == largest_error_pos && msg == NULL | |
4130 | && curr->detail.error != NULL)) | |
4131 | { | |
4132 | largest_error_pos = curr->detail.index; | |
4133 | record = curr; | |
4134 | msg = record->detail.error; | |
4135 | } | |
4136 | } | |
4137 | ||
4138 | gas_assert (largest_error_pos != -2 && record != NULL); | |
4139 | DEBUG_TRACE ("Pick up error kind %s to report", | |
4140 | operand_mismatch_kind_names[record->detail.kind]); | |
4141 | ||
4142 | /* Output. */ | |
4143 | output_operand_error_record (record, str); | |
4144 | } | |
4145 | \f | |
4146 | /* Write an AARCH64 instruction to buf - always little-endian. */ | |
4147 | static void | |
4148 | put_aarch64_insn (char *buf, uint32_t insn) | |
4149 | { | |
4150 | unsigned char *where = (unsigned char *) buf; | |
4151 | where[0] = insn; | |
4152 | where[1] = insn >> 8; | |
4153 | where[2] = insn >> 16; | |
4154 | where[3] = insn >> 24; | |
4155 | } | |
4156 | ||
4157 | static uint32_t | |
4158 | get_aarch64_insn (char *buf) | |
4159 | { | |
4160 | unsigned char *where = (unsigned char *) buf; | |
4161 | uint32_t result; | |
4162 | result = (where[0] | (where[1] << 8) | (where[2] << 16) | (where[3] << 24)); | |
4163 | return result; | |
4164 | } | |
4165 | ||
4166 | static void | |
4167 | output_inst (struct aarch64_inst *new_inst) | |
4168 | { | |
4169 | char *to = NULL; | |
4170 | ||
4171 | to = frag_more (INSN_SIZE); | |
4172 | ||
4173 | frag_now->tc_frag_data.recorded = 1; | |
4174 | ||
4175 | put_aarch64_insn (to, inst.base.value); | |
4176 | ||
4177 | if (inst.reloc.type != BFD_RELOC_UNUSED) | |
4178 | { | |
4179 | fixS *fixp = fix_new_aarch64 (frag_now, to - frag_now->fr_literal, | |
4180 | INSN_SIZE, &inst.reloc.exp, | |
4181 | inst.reloc.pc_rel, | |
4182 | inst.reloc.type); | |
4183 | DEBUG_TRACE ("Prepared relocation fix up"); | |
4184 | /* Don't check the addend value against the instruction size, | |
4185 | that's the job of our code in md_apply_fix(). */ | |
4186 | fixp->fx_no_overflow = 1; | |
4187 | if (new_inst != NULL) | |
4188 | fixp->tc_fix_data.inst = new_inst; | |
4189 | if (aarch64_gas_internal_fixup_p ()) | |
4190 | { | |
4191 | gas_assert (inst.reloc.opnd != AARCH64_OPND_NIL); | |
4192 | fixp->tc_fix_data.opnd = inst.reloc.opnd; | |
4193 | fixp->fx_addnumber = inst.reloc.flags; | |
4194 | } | |
4195 | } | |
4196 | ||
4197 | dwarf2_emit_insn (INSN_SIZE); | |
4198 | } | |
4199 | ||
4200 | /* Link together opcodes of the same name. */ | |
4201 | ||
4202 | struct templates | |
4203 | { | |
4204 | aarch64_opcode *opcode; | |
4205 | struct templates *next; | |
4206 | }; | |
4207 | ||
4208 | typedef struct templates templates; | |
4209 | ||
4210 | static templates * | |
4211 | lookup_mnemonic (const char *start, int len) | |
4212 | { | |
4213 | templates *templ = NULL; | |
4214 | ||
4215 | templ = hash_find_n (aarch64_ops_hsh, start, len); | |
4216 | return templ; | |
4217 | } | |
4218 | ||
4219 | /* Subroutine of md_assemble, responsible for looking up the primary | |
4220 | opcode from the mnemonic the user wrote. STR points to the | |
4221 | beginning of the mnemonic. */ | |
4222 | ||
4223 | static templates * | |
4224 | opcode_lookup (char **str) | |
4225 | { | |
4226 | char *end, *base; | |
4227 | const aarch64_cond *cond; | |
4228 | char condname[16]; | |
4229 | int len; | |
4230 | ||
4231 | /* Scan up to the end of the mnemonic, which must end in white space, | |
4232 | '.', or end of string. */ | |
4233 | for (base = end = *str; is_part_of_name(*end); end++) | |
4234 | if (*end == '.') | |
4235 | break; | |
4236 | ||
4237 | if (end == base) | |
4238 | return 0; | |
4239 | ||
4240 | inst.cond = COND_ALWAYS; | |
4241 | ||
4242 | /* Handle a possible condition. */ | |
4243 | if (end[0] == '.') | |
4244 | { | |
4245 | cond = hash_find_n (aarch64_cond_hsh, end + 1, 2); | |
4246 | if (cond) | |
4247 | { | |
4248 | inst.cond = cond->value; | |
4249 | *str = end + 3; | |
4250 | } | |
4251 | else | |
4252 | { | |
4253 | *str = end; | |
4254 | return 0; | |
4255 | } | |
4256 | } | |
4257 | else | |
4258 | *str = end; | |
4259 | ||
4260 | len = end - base; | |
4261 | ||
4262 | if (inst.cond == COND_ALWAYS) | |
4263 | { | |
4264 | /* Look for unaffixed mnemonic. */ | |
4265 | return lookup_mnemonic (base, len); | |
4266 | } | |
4267 | else if (len <= 13) | |
4268 | { | |
4269 | /* append ".c" to mnemonic if conditional */ | |
4270 | memcpy (condname, base, len); | |
4271 | memcpy (condname + len, ".c", 2); | |
4272 | base = condname; | |
4273 | len += 2; | |
4274 | return lookup_mnemonic (base, len); | |
4275 | } | |
4276 | ||
4277 | return NULL; | |
4278 | } | |
4279 | ||
4280 | /* Internal helper routine converting a vector neon_type_el structure | |
4281 | *VECTYPE to a corresponding operand qualifier. */ | |
4282 | ||
4283 | static inline aarch64_opnd_qualifier_t | |
4284 | vectype_to_qualifier (const struct neon_type_el *vectype) | |
4285 | { | |
4286 | /* Element size in bytes indexed by neon_el_type. */ | |
4287 | const unsigned char ele_size[5] | |
4288 | = {1, 2, 4, 8, 16}; | |
4289 | ||
4290 | if (!vectype->defined || vectype->type == NT_invtype) | |
4291 | goto vectype_conversion_fail; | |
4292 | ||
4293 | gas_assert (vectype->type >= NT_b && vectype->type <= NT_q); | |
4294 | ||
4295 | if (vectype->defined & NTA_HASINDEX) | |
4296 | /* Vector element register. */ | |
4297 | return AARCH64_OPND_QLF_S_B + vectype->type; | |
4298 | else | |
4299 | { | |
4300 | /* Vector register. */ | |
4301 | int reg_size = ele_size[vectype->type] * vectype->width; | |
4302 | unsigned offset; | |
4303 | if (reg_size != 16 && reg_size != 8) | |
4304 | goto vectype_conversion_fail; | |
4305 | /* The conversion is calculated based on the relation of the order of | |
4306 | qualifiers to the vector element size and vector register size. */ | |
4307 | offset = (vectype->type == NT_q) | |
4308 | ? 8 : (vectype->type << 1) + (reg_size >> 4); | |
4309 | gas_assert (offset <= 8); | |
4310 | return AARCH64_OPND_QLF_V_8B + offset; | |
4311 | } | |
4312 | ||
4313 | vectype_conversion_fail: | |
4314 | first_error (_("bad vector arrangement type")); | |
4315 | return AARCH64_OPND_QLF_NIL; | |
4316 | } | |
4317 | ||
4318 | /* Process an optional operand that is found omitted from the assembly line. | |
4319 | Fill *OPERAND for such an operand of type TYPE. OPCODE points to the | |
4320 | instruction's opcode entry while IDX is the index of this omitted operand. | |
4321 | */ | |
4322 | ||
4323 | static void | |
4324 | process_omitted_operand (enum aarch64_opnd type, const aarch64_opcode *opcode, | |
4325 | int idx, aarch64_opnd_info *operand) | |
4326 | { | |
4327 | aarch64_insn default_value = get_optional_operand_default_value (opcode); | |
4328 | gas_assert (optional_operand_p (opcode, idx)); | |
4329 | gas_assert (!operand->present); | |
4330 | ||
4331 | switch (type) | |
4332 | { | |
4333 | case AARCH64_OPND_Rd: | |
4334 | case AARCH64_OPND_Rn: | |
4335 | case AARCH64_OPND_Rm: | |
4336 | case AARCH64_OPND_Rt: | |
4337 | case AARCH64_OPND_Rt2: | |
4338 | case AARCH64_OPND_Rs: | |
4339 | case AARCH64_OPND_Ra: | |
4340 | case AARCH64_OPND_Rt_SYS: | |
4341 | case AARCH64_OPND_Rd_SP: | |
4342 | case AARCH64_OPND_Rn_SP: | |
4343 | case AARCH64_OPND_Fd: | |
4344 | case AARCH64_OPND_Fn: | |
4345 | case AARCH64_OPND_Fm: | |
4346 | case AARCH64_OPND_Fa: | |
4347 | case AARCH64_OPND_Ft: | |
4348 | case AARCH64_OPND_Ft2: | |
4349 | case AARCH64_OPND_Sd: | |
4350 | case AARCH64_OPND_Sn: | |
4351 | case AARCH64_OPND_Sm: | |
4352 | case AARCH64_OPND_Vd: | |
4353 | case AARCH64_OPND_Vn: | |
4354 | case AARCH64_OPND_Vm: | |
4355 | case AARCH64_OPND_VdD1: | |
4356 | case AARCH64_OPND_VnD1: | |
4357 | operand->reg.regno = default_value; | |
4358 | break; | |
4359 | ||
4360 | case AARCH64_OPND_Ed: | |
4361 | case AARCH64_OPND_En: | |
4362 | case AARCH64_OPND_Em: | |
4363 | operand->reglane.regno = default_value; | |
4364 | break; | |
4365 | ||
4366 | case AARCH64_OPND_IDX: | |
4367 | case AARCH64_OPND_BIT_NUM: | |
4368 | case AARCH64_OPND_IMMR: | |
4369 | case AARCH64_OPND_IMMS: | |
4370 | case AARCH64_OPND_SHLL_IMM: | |
4371 | case AARCH64_OPND_IMM_VLSL: | |
4372 | case AARCH64_OPND_IMM_VLSR: | |
4373 | case AARCH64_OPND_CCMP_IMM: | |
4374 | case AARCH64_OPND_FBITS: | |
4375 | case AARCH64_OPND_UIMM4: | |
4376 | case AARCH64_OPND_UIMM3_OP1: | |
4377 | case AARCH64_OPND_UIMM3_OP2: | |
4378 | case AARCH64_OPND_IMM: | |
4379 | case AARCH64_OPND_WIDTH: | |
4380 | case AARCH64_OPND_UIMM7: | |
4381 | case AARCH64_OPND_NZCV: | |
4382 | operand->imm.value = default_value; | |
4383 | break; | |
4384 | ||
4385 | case AARCH64_OPND_EXCEPTION: | |
4386 | inst.reloc.type = BFD_RELOC_UNUSED; | |
4387 | break; | |
4388 | ||
4389 | case AARCH64_OPND_BARRIER_ISB: | |
4390 | operand->barrier = aarch64_barrier_options + default_value; | |
4391 | ||
4392 | default: | |
4393 | break; | |
4394 | } | |
4395 | } | |
4396 | ||
4397 | /* Process the relocation type for move wide instructions. | |
4398 | Return TRUE on success; otherwise return FALSE. */ | |
4399 | ||
4400 | static bfd_boolean | |
4401 | process_movw_reloc_info (void) | |
4402 | { | |
4403 | int is32; | |
4404 | unsigned shift; | |
4405 | ||
4406 | is32 = inst.base.operands[0].qualifier == AARCH64_OPND_QLF_W ? 1 : 0; | |
4407 | ||
4408 | if (inst.base.opcode->op == OP_MOVK) | |
4409 | switch (inst.reloc.type) | |
4410 | { | |
4411 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
4412 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
4413 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
4414 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4415 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4416 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4417 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4418 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4419 | set_syntax_error | |
4420 | (_("the specified relocation type is not allowed for MOVK")); | |
4421 | return FALSE; | |
4422 | default: | |
4423 | break; | |
4424 | } | |
4425 | ||
4426 | switch (inst.reloc.type) | |
4427 | { | |
4428 | case BFD_RELOC_AARCH64_MOVW_G0: | |
4429 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
4430 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
4431 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: | |
4432 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
4433 | shift = 0; | |
4434 | break; | |
4435 | case BFD_RELOC_AARCH64_MOVW_G1: | |
4436 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
4437 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
4438 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: | |
4439 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
4440 | shift = 16; | |
4441 | break; | |
4442 | case BFD_RELOC_AARCH64_MOVW_G2: | |
4443 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
4444 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
4445 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
4446 | if (is32) | |
4447 | { | |
4448 | set_fatal_syntax_error | |
4449 | (_("the specified relocation type is not allowed for 32-bit " | |
4450 | "register")); | |
4451 | return FALSE; | |
4452 | } | |
4453 | shift = 32; | |
4454 | break; | |
4455 | case BFD_RELOC_AARCH64_MOVW_G3: | |
4456 | if (is32) | |
4457 | { | |
4458 | set_fatal_syntax_error | |
4459 | (_("the specified relocation type is not allowed for 32-bit " | |
4460 | "register")); | |
4461 | return FALSE; | |
4462 | } | |
4463 | shift = 48; | |
4464 | break; | |
4465 | default: | |
4466 | /* More cases should be added when more MOVW-related relocation types | |
4467 | are supported in GAS. */ | |
4468 | gas_assert (aarch64_gas_internal_fixup_p ()); | |
4469 | /* The shift amount should have already been set by the parser. */ | |
4470 | return TRUE; | |
4471 | } | |
4472 | inst.base.operands[1].shifter.amount = shift; | |
4473 | return TRUE; | |
4474 | } | |
4475 | ||
4476 | /* A primitive log caculator. */ | |
4477 | ||
4478 | static inline unsigned int | |
4479 | get_logsz (unsigned int size) | |
4480 | { | |
4481 | const unsigned char ls[16] = | |
4482 | {0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, 4}; | |
4483 | if (size > 16) | |
4484 | { | |
4485 | gas_assert (0); | |
4486 | return -1; | |
4487 | } | |
4488 | gas_assert (ls[size - 1] != (unsigned char)-1); | |
4489 | return ls[size - 1]; | |
4490 | } | |
4491 | ||
4492 | /* Determine and return the real reloc type code for an instruction | |
4493 | with the pseudo reloc type code BFD_RELOC_AARCH64_LDST_LO12. */ | |
4494 | ||
4495 | static inline bfd_reloc_code_real_type | |
4496 | ldst_lo12_determine_real_reloc_type (void) | |
4497 | { | |
4498 | int logsz; | |
4499 | enum aarch64_opnd_qualifier opd0_qlf = inst.base.operands[0].qualifier; | |
4500 | enum aarch64_opnd_qualifier opd1_qlf = inst.base.operands[1].qualifier; | |
4501 | ||
4502 | const bfd_reloc_code_real_type reloc_ldst_lo12[5] = { | |
4503 | BFD_RELOC_AARCH64_LDST8_LO12, BFD_RELOC_AARCH64_LDST16_LO12, | |
4504 | BFD_RELOC_AARCH64_LDST32_LO12, BFD_RELOC_AARCH64_LDST64_LO12, | |
4505 | BFD_RELOC_AARCH64_LDST128_LO12 | |
4506 | }; | |
4507 | ||
4508 | gas_assert (inst.reloc.type == BFD_RELOC_AARCH64_LDST_LO12); | |
4509 | gas_assert (inst.base.opcode->operands[1] == AARCH64_OPND_ADDR_UIMM12); | |
4510 | ||
4511 | if (opd1_qlf == AARCH64_OPND_QLF_NIL) | |
4512 | opd1_qlf = | |
4513 | aarch64_get_expected_qualifier (inst.base.opcode->qualifiers_list, | |
4514 | 1, opd0_qlf, 0); | |
4515 | gas_assert (opd1_qlf != AARCH64_OPND_QLF_NIL); | |
4516 | ||
4517 | logsz = get_logsz (aarch64_get_qualifier_esize (opd1_qlf)); | |
4518 | gas_assert (logsz >= 0 && logsz <= 4); | |
4519 | ||
4520 | return reloc_ldst_lo12[logsz]; | |
4521 | } | |
4522 | ||
4523 | /* Check whether a register list REGINFO is valid. The registers must be | |
4524 | numbered in increasing order (modulo 32), in increments of one or two. | |
4525 | ||
4526 | If ACCEPT_ALTERNATE is non-zero, the register numbers should be in | |
4527 | increments of two. | |
4528 | ||
4529 | Return FALSE if such a register list is invalid, otherwise return TRUE. */ | |
4530 | ||
4531 | static bfd_boolean | |
4532 | reg_list_valid_p (uint32_t reginfo, int accept_alternate) | |
4533 | { | |
4534 | uint32_t i, nb_regs, prev_regno, incr; | |
4535 | ||
4536 | nb_regs = 1 + (reginfo & 0x3); | |
4537 | reginfo >>= 2; | |
4538 | prev_regno = reginfo & 0x1f; | |
4539 | incr = accept_alternate ? 2 : 1; | |
4540 | ||
4541 | for (i = 1; i < nb_regs; ++i) | |
4542 | { | |
4543 | uint32_t curr_regno; | |
4544 | reginfo >>= 5; | |
4545 | curr_regno = reginfo & 0x1f; | |
4546 | if (curr_regno != ((prev_regno + incr) & 0x1f)) | |
4547 | return FALSE; | |
4548 | prev_regno = curr_regno; | |
4549 | } | |
4550 | ||
4551 | return TRUE; | |
4552 | } | |
4553 | ||
4554 | /* Generic instruction operand parser. This does no encoding and no | |
4555 | semantic validation; it merely squirrels values away in the inst | |
4556 | structure. Returns TRUE or FALSE depending on whether the | |
4557 | specified grammar matched. */ | |
4558 | ||
4559 | static bfd_boolean | |
4560 | parse_operands (char *str, const aarch64_opcode *opcode) | |
4561 | { | |
4562 | int i; | |
4563 | char *backtrack_pos = 0; | |
4564 | const enum aarch64_opnd *operands = opcode->operands; | |
4565 | ||
4566 | clear_error (); | |
4567 | skip_whitespace (str); | |
4568 | ||
4569 | for (i = 0; operands[i] != AARCH64_OPND_NIL; i++) | |
4570 | { | |
4571 | int64_t val; | |
4572 | int isreg32, isregzero; | |
4573 | int comma_skipped_p = 0; | |
4574 | aarch64_reg_type rtype; | |
4575 | struct neon_type_el vectype; | |
4576 | aarch64_opnd_info *info = &inst.base.operands[i]; | |
4577 | ||
4578 | DEBUG_TRACE ("parse operand %d", i); | |
4579 | ||
4580 | /* Assign the operand code. */ | |
4581 | info->type = operands[i]; | |
4582 | ||
4583 | if (optional_operand_p (opcode, i)) | |
4584 | { | |
4585 | /* Remember where we are in case we need to backtrack. */ | |
4586 | gas_assert (!backtrack_pos); | |
4587 | backtrack_pos = str; | |
4588 | } | |
4589 | ||
4590 | /* Expect comma between operands; the backtrack mechanizm will take | |
4591 | care of cases of omitted optional operand. */ | |
4592 | if (i > 0 && ! skip_past_char (&str, ',')) | |
4593 | { | |
4594 | set_syntax_error (_("comma expected between operands")); | |
4595 | goto failure; | |
4596 | } | |
4597 | else | |
4598 | comma_skipped_p = 1; | |
4599 | ||
4600 | switch (operands[i]) | |
4601 | { | |
4602 | case AARCH64_OPND_Rd: | |
4603 | case AARCH64_OPND_Rn: | |
4604 | case AARCH64_OPND_Rm: | |
4605 | case AARCH64_OPND_Rt: | |
4606 | case AARCH64_OPND_Rt2: | |
4607 | case AARCH64_OPND_Rs: | |
4608 | case AARCH64_OPND_Ra: | |
4609 | case AARCH64_OPND_Rt_SYS: | |
4610 | po_int_reg_or_fail (1, 0); | |
4611 | break; | |
4612 | ||
4613 | case AARCH64_OPND_Rd_SP: | |
4614 | case AARCH64_OPND_Rn_SP: | |
4615 | po_int_reg_or_fail (0, 1); | |
4616 | break; | |
4617 | ||
4618 | case AARCH64_OPND_Rm_EXT: | |
4619 | case AARCH64_OPND_Rm_SFT: | |
4620 | po_misc_or_fail (parse_shifter_operand | |
4621 | (&str, info, (operands[i] == AARCH64_OPND_Rm_EXT | |
4622 | ? SHIFTED_ARITH_IMM | |
4623 | : SHIFTED_LOGIC_IMM))); | |
4624 | if (!info->shifter.operator_present) | |
4625 | { | |
4626 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4627 | kind to be explicit. */ | |
4628 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4629 | info->shifter.kind = AARCH64_MOD_LSL; | |
4630 | /* For Rm_EXT, libopcodes will carry out further check on whether | |
4631 | or not stack pointer is used in the instruction (Recall that | |
4632 | "the extend operator is not optional unless at least one of | |
4633 | "Rd" or "Rn" is '11111' (i.e. WSP)"). */ | |
4634 | } | |
4635 | break; | |
4636 | ||
4637 | case AARCH64_OPND_Fd: | |
4638 | case AARCH64_OPND_Fn: | |
4639 | case AARCH64_OPND_Fm: | |
4640 | case AARCH64_OPND_Fa: | |
4641 | case AARCH64_OPND_Ft: | |
4642 | case AARCH64_OPND_Ft2: | |
4643 | case AARCH64_OPND_Sd: | |
4644 | case AARCH64_OPND_Sn: | |
4645 | case AARCH64_OPND_Sm: | |
4646 | val = aarch64_reg_parse (&str, REG_TYPE_BHSDQ, &rtype, NULL); | |
4647 | if (val == PARSE_FAIL) | |
4648 | { | |
4649 | first_error (_(get_reg_expected_msg (REG_TYPE_BHSDQ))); | |
4650 | goto failure; | |
4651 | } | |
4652 | gas_assert (rtype >= REG_TYPE_FP_B && rtype <= REG_TYPE_FP_Q); | |
4653 | ||
4654 | info->reg.regno = val; | |
4655 | info->qualifier = AARCH64_OPND_QLF_S_B + (rtype - REG_TYPE_FP_B); | |
4656 | break; | |
4657 | ||
4658 | case AARCH64_OPND_Vd: | |
4659 | case AARCH64_OPND_Vn: | |
4660 | case AARCH64_OPND_Vm: | |
4661 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4662 | if (val == PARSE_FAIL) | |
4663 | { | |
4664 | first_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4665 | goto failure; | |
4666 | } | |
4667 | if (vectype.defined & NTA_HASINDEX) | |
4668 | goto failure; | |
4669 | ||
4670 | info->reg.regno = val; | |
4671 | info->qualifier = vectype_to_qualifier (&vectype); | |
4672 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4673 | goto failure; | |
4674 | break; | |
4675 | ||
4676 | case AARCH64_OPND_VdD1: | |
4677 | case AARCH64_OPND_VnD1: | |
4678 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4679 | if (val == PARSE_FAIL) | |
4680 | { | |
4681 | set_first_syntax_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4682 | goto failure; | |
4683 | } | |
4684 | if (vectype.type != NT_d || vectype.index != 1) | |
4685 | { | |
4686 | set_fatal_syntax_error | |
4687 | (_("the top half of a 128-bit FP/SIMD register is expected")); | |
4688 | goto failure; | |
4689 | } | |
4690 | info->reg.regno = val; | |
4691 | /* N.B: VdD1 and VnD1 are treated as an fp or advsimd scalar register | |
4692 | here; it is correct for the purpose of encoding/decoding since | |
4693 | only the register number is explicitly encoded in the related | |
4694 | instructions, although this appears a bit hacky. */ | |
4695 | info->qualifier = AARCH64_OPND_QLF_S_D; | |
4696 | break; | |
4697 | ||
4698 | case AARCH64_OPND_Ed: | |
4699 | case AARCH64_OPND_En: | |
4700 | case AARCH64_OPND_Em: | |
4701 | val = aarch64_reg_parse (&str, REG_TYPE_VN, NULL, &vectype); | |
4702 | if (val == PARSE_FAIL) | |
4703 | { | |
4704 | first_error (_(get_reg_expected_msg (REG_TYPE_VN))); | |
4705 | goto failure; | |
4706 | } | |
4707 | if (vectype.type == NT_invtype || !(vectype.defined & NTA_HASINDEX)) | |
4708 | goto failure; | |
4709 | ||
4710 | info->reglane.regno = val; | |
4711 | info->reglane.index = vectype.index; | |
4712 | info->qualifier = vectype_to_qualifier (&vectype); | |
4713 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4714 | goto failure; | |
4715 | break; | |
4716 | ||
4717 | case AARCH64_OPND_LVn: | |
4718 | case AARCH64_OPND_LVt: | |
4719 | case AARCH64_OPND_LVt_AL: | |
4720 | case AARCH64_OPND_LEt: | |
4721 | if ((val = parse_neon_reg_list (&str, &vectype)) == PARSE_FAIL) | |
4722 | goto failure; | |
4723 | if (! reg_list_valid_p (val, /* accept_alternate */ 0)) | |
4724 | { | |
4725 | set_fatal_syntax_error (_("invalid register list")); | |
4726 | goto failure; | |
4727 | } | |
4728 | info->reglist.first_regno = (val >> 2) & 0x1f; | |
4729 | info->reglist.num_regs = (val & 0x3) + 1; | |
4730 | if (operands[i] == AARCH64_OPND_LEt) | |
4731 | { | |
4732 | if (!(vectype.defined & NTA_HASINDEX)) | |
4733 | goto failure; | |
4734 | info->reglist.has_index = 1; | |
4735 | info->reglist.index = vectype.index; | |
4736 | } | |
4737 | else if (!(vectype.defined & NTA_HASTYPE)) | |
4738 | goto failure; | |
4739 | info->qualifier = vectype_to_qualifier (&vectype); | |
4740 | if (info->qualifier == AARCH64_OPND_QLF_NIL) | |
4741 | goto failure; | |
4742 | break; | |
4743 | ||
4744 | case AARCH64_OPND_Cn: | |
4745 | case AARCH64_OPND_Cm: | |
4746 | po_reg_or_fail (REG_TYPE_CN); | |
4747 | if (val > 15) | |
4748 | { | |
4749 | set_fatal_syntax_error (_(get_reg_expected_msg (REG_TYPE_CN))); | |
4750 | goto failure; | |
4751 | } | |
4752 | inst.base.operands[i].reg.regno = val; | |
4753 | break; | |
4754 | ||
4755 | case AARCH64_OPND_SHLL_IMM: | |
4756 | case AARCH64_OPND_IMM_VLSR: | |
4757 | po_imm_or_fail (1, 64); | |
4758 | info->imm.value = val; | |
4759 | break; | |
4760 | ||
4761 | case AARCH64_OPND_CCMP_IMM: | |
4762 | case AARCH64_OPND_FBITS: | |
4763 | case AARCH64_OPND_UIMM4: | |
4764 | case AARCH64_OPND_UIMM3_OP1: | |
4765 | case AARCH64_OPND_UIMM3_OP2: | |
4766 | case AARCH64_OPND_IMM_VLSL: | |
4767 | case AARCH64_OPND_IMM: | |
4768 | case AARCH64_OPND_WIDTH: | |
4769 | po_imm_nc_or_fail (); | |
4770 | info->imm.value = val; | |
4771 | break; | |
4772 | ||
4773 | case AARCH64_OPND_UIMM7: | |
4774 | po_imm_or_fail (0, 127); | |
4775 | info->imm.value = val; | |
4776 | break; | |
4777 | ||
4778 | case AARCH64_OPND_IDX: | |
4779 | case AARCH64_OPND_BIT_NUM: | |
4780 | case AARCH64_OPND_IMMR: | |
4781 | case AARCH64_OPND_IMMS: | |
4782 | po_imm_or_fail (0, 63); | |
4783 | info->imm.value = val; | |
4784 | break; | |
4785 | ||
4786 | case AARCH64_OPND_IMM0: | |
4787 | po_imm_nc_or_fail (); | |
4788 | if (val != 0) | |
4789 | { | |
4790 | set_fatal_syntax_error (_("immediate zero expected")); | |
4791 | goto failure; | |
4792 | } | |
4793 | info->imm.value = 0; | |
4794 | break; | |
4795 | ||
4796 | case AARCH64_OPND_FPIMM0: | |
4797 | { | |
4798 | int qfloat; | |
4799 | bfd_boolean res1 = FALSE, res2 = FALSE; | |
4800 | /* N.B. -0.0 will be rejected; although -0.0 shouldn't be rejected, | |
4801 | it is probably not worth the effort to support it. */ | |
62b0d0d5 | 4802 | if (!(res1 = parse_aarch64_imm_float (&str, &qfloat, FALSE)) |
a06ea964 NC |
4803 | && !(res2 = parse_constant_immediate (&str, &val))) |
4804 | goto failure; | |
4805 | if ((res1 && qfloat == 0) || (res2 && val == 0)) | |
4806 | { | |
4807 | info->imm.value = 0; | |
4808 | info->imm.is_fp = 1; | |
4809 | break; | |
4810 | } | |
4811 | set_fatal_syntax_error (_("immediate zero expected")); | |
4812 | goto failure; | |
4813 | } | |
4814 | ||
4815 | case AARCH64_OPND_IMM_MOV: | |
4816 | { | |
4817 | char *saved = str; | |
8db49cc2 WN |
4818 | if (reg_name_p (str, REG_TYPE_R_Z_SP) || |
4819 | reg_name_p (str, REG_TYPE_VN)) | |
a06ea964 NC |
4820 | goto failure; |
4821 | str = saved; | |
4822 | po_misc_or_fail (my_get_expression (&inst.reloc.exp, &str, | |
4823 | GE_OPT_PREFIX, 1)); | |
4824 | /* The MOV immediate alias will be fixed up by fix_mov_imm_insn | |
4825 | later. fix_mov_imm_insn will try to determine a machine | |
4826 | instruction (MOVZ, MOVN or ORR) for it and will issue an error | |
4827 | message if the immediate cannot be moved by a single | |
4828 | instruction. */ | |
4829 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 1); | |
4830 | inst.base.operands[i].skip = 1; | |
4831 | } | |
4832 | break; | |
4833 | ||
4834 | case AARCH64_OPND_SIMD_IMM: | |
4835 | case AARCH64_OPND_SIMD_IMM_SFT: | |
4836 | if (! parse_big_immediate (&str, &val)) | |
4837 | goto failure; | |
4838 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4839 | /* addr_off_p */ 0, | |
4840 | /* need_libopcodes_p */ 1, | |
4841 | /* skip_p */ 1); | |
4842 | /* Parse shift. | |
4843 | N.B. although AARCH64_OPND_SIMD_IMM doesn't permit any | |
4844 | shift, we don't check it here; we leave the checking to | |
4845 | the libopcodes (operand_general_constraint_met_p). By | |
4846 | doing this, we achieve better diagnostics. */ | |
4847 | if (skip_past_comma (&str) | |
4848 | && ! parse_shift (&str, info, SHIFTED_LSL_MSL)) | |
4849 | goto failure; | |
4850 | if (!info->shifter.operator_present | |
4851 | && info->type == AARCH64_OPND_SIMD_IMM_SFT) | |
4852 | { | |
4853 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4854 | kind to be explicit. */ | |
4855 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4856 | info->shifter.kind = AARCH64_MOD_LSL; | |
4857 | } | |
4858 | break; | |
4859 | ||
4860 | case AARCH64_OPND_FPIMM: | |
4861 | case AARCH64_OPND_SIMD_FPIMM: | |
4862 | { | |
4863 | int qfloat; | |
62b0d0d5 YZ |
4864 | bfd_boolean dp_p |
4865 | = (aarch64_get_qualifier_esize (inst.base.operands[0].qualifier) | |
4866 | == 8); | |
4867 | if (! parse_aarch64_imm_float (&str, &qfloat, dp_p)) | |
a06ea964 NC |
4868 | goto failure; |
4869 | if (qfloat == 0) | |
4870 | { | |
4871 | set_fatal_syntax_error (_("invalid floating-point constant")); | |
4872 | goto failure; | |
4873 | } | |
4874 | inst.base.operands[i].imm.value = encode_imm_float_bits (qfloat); | |
4875 | inst.base.operands[i].imm.is_fp = 1; | |
4876 | } | |
4877 | break; | |
4878 | ||
4879 | case AARCH64_OPND_LIMM: | |
4880 | po_misc_or_fail (parse_shifter_operand (&str, info, | |
4881 | SHIFTED_LOGIC_IMM)); | |
4882 | if (info->shifter.operator_present) | |
4883 | { | |
4884 | set_fatal_syntax_error | |
4885 | (_("shift not allowed for bitmask immediate")); | |
4886 | goto failure; | |
4887 | } | |
4888 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4889 | /* addr_off_p */ 0, | |
4890 | /* need_libopcodes_p */ 1, | |
4891 | /* skip_p */ 1); | |
4892 | break; | |
4893 | ||
4894 | case AARCH64_OPND_AIMM: | |
4895 | if (opcode->op == OP_ADD) | |
4896 | /* ADD may have relocation types. */ | |
4897 | po_misc_or_fail (parse_shifter_operand_reloc (&str, info, | |
4898 | SHIFTED_ARITH_IMM)); | |
4899 | else | |
4900 | po_misc_or_fail (parse_shifter_operand (&str, info, | |
4901 | SHIFTED_ARITH_IMM)); | |
4902 | switch (inst.reloc.type) | |
4903 | { | |
4904 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: | |
4905 | info->shifter.amount = 12; | |
4906 | break; | |
4907 | case BFD_RELOC_UNUSED: | |
4908 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 0); | |
4909 | if (info->shifter.kind != AARCH64_MOD_NONE) | |
4910 | inst.reloc.flags = FIXUP_F_HAS_EXPLICIT_SHIFT; | |
4911 | inst.reloc.pc_rel = 0; | |
4912 | break; | |
4913 | default: | |
4914 | break; | |
4915 | } | |
4916 | info->imm.value = 0; | |
4917 | if (!info->shifter.operator_present) | |
4918 | { | |
4919 | /* Default to LSL if not present. Libopcodes prefers shifter | |
4920 | kind to be explicit. */ | |
4921 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
4922 | info->shifter.kind = AARCH64_MOD_LSL; | |
4923 | } | |
4924 | break; | |
4925 | ||
4926 | case AARCH64_OPND_HALF: | |
4927 | { | |
4928 | /* #<imm16> or relocation. */ | |
4929 | int internal_fixup_p; | |
4930 | po_misc_or_fail (parse_half (&str, &internal_fixup_p)); | |
4931 | if (internal_fixup_p) | |
4932 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 0); | |
4933 | skip_whitespace (str); | |
4934 | if (skip_past_comma (&str)) | |
4935 | { | |
4936 | /* {, LSL #<shift>} */ | |
4937 | if (! aarch64_gas_internal_fixup_p ()) | |
4938 | { | |
4939 | set_fatal_syntax_error (_("can't mix relocation modifier " | |
4940 | "with explicit shift")); | |
4941 | goto failure; | |
4942 | } | |
4943 | po_misc_or_fail (parse_shift (&str, info, SHIFTED_LSL)); | |
4944 | } | |
4945 | else | |
4946 | inst.base.operands[i].shifter.amount = 0; | |
4947 | inst.base.operands[i].shifter.kind = AARCH64_MOD_LSL; | |
4948 | inst.base.operands[i].imm.value = 0; | |
4949 | if (! process_movw_reloc_info ()) | |
4950 | goto failure; | |
4951 | } | |
4952 | break; | |
4953 | ||
4954 | case AARCH64_OPND_EXCEPTION: | |
4955 | po_misc_or_fail (parse_immediate_expression (&str, &inst.reloc.exp)); | |
4956 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
4957 | /* addr_off_p */ 0, | |
4958 | /* need_libopcodes_p */ 0, | |
4959 | /* skip_p */ 1); | |
4960 | break; | |
4961 | ||
4962 | case AARCH64_OPND_NZCV: | |
4963 | { | |
4964 | const asm_nzcv *nzcv = hash_find_n (aarch64_nzcv_hsh, str, 4); | |
4965 | if (nzcv != NULL) | |
4966 | { | |
4967 | str += 4; | |
4968 | info->imm.value = nzcv->value; | |
4969 | break; | |
4970 | } | |
4971 | po_imm_or_fail (0, 15); | |
4972 | info->imm.value = val; | |
4973 | } | |
4974 | break; | |
4975 | ||
4976 | case AARCH64_OPND_COND: | |
68a64283 | 4977 | case AARCH64_OPND_COND1: |
a06ea964 NC |
4978 | info->cond = hash_find_n (aarch64_cond_hsh, str, 2); |
4979 | str += 2; | |
4980 | if (info->cond == NULL) | |
4981 | { | |
4982 | set_syntax_error (_("invalid condition")); | |
4983 | goto failure; | |
4984 | } | |
68a64283 YZ |
4985 | else if (operands[i] == AARCH64_OPND_COND1 |
4986 | && (info->cond->value & 0xe) == 0xe) | |
4987 | { | |
4988 | /* Not allow AL or NV. */ | |
4989 | set_default_error (); | |
4990 | goto failure; | |
4991 | } | |
a06ea964 NC |
4992 | break; |
4993 | ||
4994 | case AARCH64_OPND_ADDR_ADRP: | |
4995 | po_misc_or_fail (parse_adrp (&str)); | |
4996 | /* Clear the value as operand needs to be relocated. */ | |
4997 | info->imm.value = 0; | |
4998 | break; | |
4999 | ||
5000 | case AARCH64_OPND_ADDR_PCREL14: | |
5001 | case AARCH64_OPND_ADDR_PCREL19: | |
5002 | case AARCH64_OPND_ADDR_PCREL21: | |
5003 | case AARCH64_OPND_ADDR_PCREL26: | |
5004 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
5005 | if (!info->addr.pcrel) | |
5006 | { | |
5007 | set_syntax_error (_("invalid pc-relative address")); | |
5008 | goto failure; | |
5009 | } | |
5010 | if (inst.gen_lit_pool | |
5011 | && (opcode->iclass != loadlit || opcode->op == OP_PRFM_LIT)) | |
5012 | { | |
5013 | /* Only permit "=value" in the literal load instructions. | |
5014 | The literal will be generated by programmer_friendly_fixup. */ | |
5015 | set_syntax_error (_("invalid use of \"=immediate\"")); | |
5016 | goto failure; | |
5017 | } | |
5018 | if (inst.reloc.exp.X_op == O_symbol && find_reloc_table_entry (&str)) | |
5019 | { | |
5020 | set_syntax_error (_("unrecognized relocation suffix")); | |
5021 | goto failure; | |
5022 | } | |
5023 | if (inst.reloc.exp.X_op == O_constant && !inst.gen_lit_pool) | |
5024 | { | |
5025 | info->imm.value = inst.reloc.exp.X_add_number; | |
5026 | inst.reloc.type = BFD_RELOC_UNUSED; | |
5027 | } | |
5028 | else | |
5029 | { | |
5030 | info->imm.value = 0; | |
f41aef5f RE |
5031 | if (inst.reloc.type == BFD_RELOC_UNUSED) |
5032 | switch (opcode->iclass) | |
5033 | { | |
5034 | case compbranch: | |
5035 | case condbranch: | |
5036 | /* e.g. CBZ or B.COND */ | |
5037 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL19); | |
5038 | inst.reloc.type = BFD_RELOC_AARCH64_BRANCH19; | |
5039 | break; | |
5040 | case testbranch: | |
5041 | /* e.g. TBZ */ | |
5042 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL14); | |
5043 | inst.reloc.type = BFD_RELOC_AARCH64_TSTBR14; | |
5044 | break; | |
5045 | case branch_imm: | |
5046 | /* e.g. B or BL */ | |
5047 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL26); | |
5048 | inst.reloc.type = | |
5049 | (opcode->op == OP_BL) ? BFD_RELOC_AARCH64_CALL26 | |
5050 | : BFD_RELOC_AARCH64_JUMP26; | |
5051 | break; | |
5052 | case loadlit: | |
5053 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL19); | |
5054 | inst.reloc.type = BFD_RELOC_AARCH64_LD_LO19_PCREL; | |
5055 | break; | |
5056 | case pcreladdr: | |
5057 | gas_assert (operands[i] == AARCH64_OPND_ADDR_PCREL21); | |
5058 | inst.reloc.type = BFD_RELOC_AARCH64_ADR_LO21_PCREL; | |
5059 | break; | |
5060 | default: | |
5061 | gas_assert (0); | |
5062 | abort (); | |
5063 | } | |
a06ea964 NC |
5064 | inst.reloc.pc_rel = 1; |
5065 | } | |
5066 | break; | |
5067 | ||
5068 | case AARCH64_OPND_ADDR_SIMPLE: | |
5069 | case AARCH64_OPND_SIMD_ADDR_SIMPLE: | |
5070 | /* [<Xn|SP>{, #<simm>}] */ | |
5071 | po_char_or_fail ('['); | |
5072 | po_reg_or_fail (REG_TYPE_R64_SP); | |
5073 | /* Accept optional ", #0". */ | |
5074 | if (operands[i] == AARCH64_OPND_ADDR_SIMPLE | |
5075 | && skip_past_char (&str, ',')) | |
5076 | { | |
5077 | skip_past_char (&str, '#'); | |
5078 | if (! skip_past_char (&str, '0')) | |
5079 | { | |
5080 | set_fatal_syntax_error | |
5081 | (_("the optional immediate offset can only be 0")); | |
5082 | goto failure; | |
5083 | } | |
5084 | } | |
5085 | po_char_or_fail (']'); | |
5086 | info->addr.base_regno = val; | |
5087 | break; | |
5088 | ||
5089 | case AARCH64_OPND_ADDR_REGOFF: | |
5090 | /* [<Xn|SP>, <R><m>{, <extend> {<amount>}}] */ | |
5091 | po_misc_or_fail (parse_address (&str, info, 0)); | |
5092 | if (info->addr.pcrel || !info->addr.offset.is_reg | |
5093 | || !info->addr.preind || info->addr.postind | |
5094 | || info->addr.writeback) | |
5095 | { | |
5096 | set_syntax_error (_("invalid addressing mode")); | |
5097 | goto failure; | |
5098 | } | |
5099 | if (!info->shifter.operator_present) | |
5100 | { | |
5101 | /* Default to LSL if not present. Libopcodes prefers shifter | |
5102 | kind to be explicit. */ | |
5103 | gas_assert (info->shifter.kind == AARCH64_MOD_NONE); | |
5104 | info->shifter.kind = AARCH64_MOD_LSL; | |
5105 | } | |
5106 | /* Qualifier to be deduced by libopcodes. */ | |
5107 | break; | |
5108 | ||
5109 | case AARCH64_OPND_ADDR_SIMM7: | |
5110 | po_misc_or_fail (parse_address (&str, info, 0)); | |
5111 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5112 | || (!info->addr.preind && !info->addr.postind)) | |
5113 | { | |
5114 | set_syntax_error (_("invalid addressing mode")); | |
5115 | goto failure; | |
5116 | } | |
5117 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
5118 | /* addr_off_p */ 1, | |
5119 | /* need_libopcodes_p */ 1, | |
5120 | /* skip_p */ 0); | |
5121 | break; | |
5122 | ||
5123 | case AARCH64_OPND_ADDR_SIMM9: | |
5124 | case AARCH64_OPND_ADDR_SIMM9_2: | |
5125 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
5126 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5127 | || (!info->addr.preind && !info->addr.postind) | |
5128 | || (operands[i] == AARCH64_OPND_ADDR_SIMM9_2 | |
5129 | && info->addr.writeback)) | |
5130 | { | |
5131 | set_syntax_error (_("invalid addressing mode")); | |
5132 | goto failure; | |
5133 | } | |
5134 | if (inst.reloc.type != BFD_RELOC_UNUSED) | |
5135 | { | |
5136 | set_syntax_error (_("relocation not allowed")); | |
5137 | goto failure; | |
5138 | } | |
5139 | assign_imm_if_const_or_fixup_later (&inst.reloc, info, | |
5140 | /* addr_off_p */ 1, | |
5141 | /* need_libopcodes_p */ 1, | |
5142 | /* skip_p */ 0); | |
5143 | break; | |
5144 | ||
5145 | case AARCH64_OPND_ADDR_UIMM12: | |
5146 | po_misc_or_fail (parse_address_reloc (&str, info)); | |
5147 | if (info->addr.pcrel || info->addr.offset.is_reg | |
5148 | || !info->addr.preind || info->addr.writeback) | |
5149 | { | |
5150 | set_syntax_error (_("invalid addressing mode")); | |
5151 | goto failure; | |
5152 | } | |
5153 | if (inst.reloc.type == BFD_RELOC_UNUSED) | |
5154 | aarch64_set_gas_internal_fixup (&inst.reloc, info, 1); | |
5155 | else if (inst.reloc.type == BFD_RELOC_AARCH64_LDST_LO12) | |
5156 | inst.reloc.type = ldst_lo12_determine_real_reloc_type (); | |
5157 | /* Leave qualifier to be determined by libopcodes. */ | |
5158 | break; | |
5159 | ||
5160 | case AARCH64_OPND_SIMD_ADDR_POST: | |
5161 | /* [<Xn|SP>], <Xm|#<amount>> */ | |
5162 | po_misc_or_fail (parse_address (&str, info, 1)); | |
5163 | if (!info->addr.postind || !info->addr.writeback) | |
5164 | { | |
5165 | set_syntax_error (_("invalid addressing mode")); | |
5166 | goto failure; | |
5167 | } | |
5168 | if (!info->addr.offset.is_reg) | |
5169 | { | |
5170 | if (inst.reloc.exp.X_op == O_constant) | |
5171 | info->addr.offset.imm = inst.reloc.exp.X_add_number; | |
5172 | else | |
5173 | { | |
5174 | set_fatal_syntax_error | |
5175 | (_("writeback value should be an immediate constant")); | |
5176 | goto failure; | |
5177 | } | |
5178 | } | |
5179 | /* No qualifier. */ | |
5180 | break; | |
5181 | ||
5182 | case AARCH64_OPND_SYSREG: | |
a203d9b7 YZ |
5183 | if ((val = parse_sys_reg (&str, aarch64_sys_regs_hsh, 1)) |
5184 | == PARSE_FAIL) | |
a06ea964 | 5185 | { |
a203d9b7 YZ |
5186 | set_syntax_error (_("unknown or missing system register name")); |
5187 | goto failure; | |
a06ea964 | 5188 | } |
a203d9b7 | 5189 | inst.base.operands[i].sysreg = val; |
a06ea964 NC |
5190 | break; |
5191 | ||
5192 | case AARCH64_OPND_PSTATEFIELD: | |
a203d9b7 | 5193 | if ((val = parse_sys_reg (&str, aarch64_pstatefield_hsh, 0)) |
a3251895 | 5194 | == PARSE_FAIL) |
a06ea964 NC |
5195 | { |
5196 | set_syntax_error (_("unknown or missing PSTATE field name")); | |
5197 | goto failure; | |
5198 | } | |
5199 | inst.base.operands[i].pstatefield = val; | |
5200 | break; | |
5201 | ||
5202 | case AARCH64_OPND_SYSREG_IC: | |
5203 | inst.base.operands[i].sysins_op = | |
5204 | parse_sys_ins_reg (&str, aarch64_sys_regs_ic_hsh); | |
5205 | goto sys_reg_ins; | |
5206 | case AARCH64_OPND_SYSREG_DC: | |
5207 | inst.base.operands[i].sysins_op = | |
5208 | parse_sys_ins_reg (&str, aarch64_sys_regs_dc_hsh); | |
5209 | goto sys_reg_ins; | |
5210 | case AARCH64_OPND_SYSREG_AT: | |
5211 | inst.base.operands[i].sysins_op = | |
5212 | parse_sys_ins_reg (&str, aarch64_sys_regs_at_hsh); | |
5213 | goto sys_reg_ins; | |
5214 | case AARCH64_OPND_SYSREG_TLBI: | |
5215 | inst.base.operands[i].sysins_op = | |
5216 | parse_sys_ins_reg (&str, aarch64_sys_regs_tlbi_hsh); | |
5217 | sys_reg_ins: | |
5218 | if (inst.base.operands[i].sysins_op == NULL) | |
5219 | { | |
5220 | set_fatal_syntax_error ( _("unknown or missing operation name")); | |
5221 | goto failure; | |
5222 | } | |
5223 | break; | |
5224 | ||
5225 | case AARCH64_OPND_BARRIER: | |
5226 | case AARCH64_OPND_BARRIER_ISB: | |
5227 | val = parse_barrier (&str); | |
5228 | if (val != PARSE_FAIL | |
5229 | && operands[i] == AARCH64_OPND_BARRIER_ISB && val != 0xf) | |
5230 | { | |
5231 | /* ISB only accepts options name 'sy'. */ | |
5232 | set_syntax_error | |
5233 | (_("the specified option is not accepted in ISB")); | |
5234 | /* Turn off backtrack as this optional operand is present. */ | |
5235 | backtrack_pos = 0; | |
5236 | goto failure; | |
5237 | } | |
5238 | /* This is an extension to accept a 0..15 immediate. */ | |
5239 | if (val == PARSE_FAIL) | |
5240 | po_imm_or_fail (0, 15); | |
5241 | info->barrier = aarch64_barrier_options + val; | |
5242 | break; | |
5243 | ||
5244 | case AARCH64_OPND_PRFOP: | |
5245 | val = parse_pldop (&str); | |
5246 | /* This is an extension to accept a 0..31 immediate. */ | |
5247 | if (val == PARSE_FAIL) | |
5248 | po_imm_or_fail (0, 31); | |
5249 | inst.base.operands[i].prfop = aarch64_prfops + val; | |
5250 | break; | |
5251 | ||
5252 | default: | |
5253 | as_fatal (_("unhandled operand code %d"), operands[i]); | |
5254 | } | |
5255 | ||
5256 | /* If we get here, this operand was successfully parsed. */ | |
5257 | inst.base.operands[i].present = 1; | |
5258 | continue; | |
5259 | ||
5260 | failure: | |
5261 | /* The parse routine should already have set the error, but in case | |
5262 | not, set a default one here. */ | |
5263 | if (! error_p ()) | |
5264 | set_default_error (); | |
5265 | ||
5266 | if (! backtrack_pos) | |
5267 | goto parse_operands_return; | |
5268 | ||
5269 | /* Reaching here means we are dealing with an optional operand that is | |
5270 | omitted from the assembly line. */ | |
5271 | gas_assert (optional_operand_p (opcode, i)); | |
5272 | info->present = 0; | |
5273 | process_omitted_operand (operands[i], opcode, i, info); | |
5274 | ||
5275 | /* Try again, skipping the optional operand at backtrack_pos. */ | |
5276 | str = backtrack_pos; | |
5277 | backtrack_pos = 0; | |
5278 | ||
5279 | /* If this is the last operand that is optional and omitted, but without | |
5280 | the presence of a comma. */ | |
5281 | if (i && comma_skipped_p && i == aarch64_num_of_operands (opcode) - 1) | |
5282 | { | |
5283 | set_fatal_syntax_error | |
5284 | (_("unexpected comma before the omitted optional operand")); | |
5285 | goto parse_operands_return; | |
5286 | } | |
5287 | ||
5288 | /* Clear any error record after the omitted optional operand has been | |
5289 | successfully handled. */ | |
5290 | clear_error (); | |
5291 | } | |
5292 | ||
5293 | /* Check if we have parsed all the operands. */ | |
5294 | if (*str != '\0' && ! error_p ()) | |
5295 | { | |
5296 | /* Set I to the index of the last present operand; this is | |
5297 | for the purpose of diagnostics. */ | |
5298 | for (i -= 1; i >= 0 && !inst.base.operands[i].present; --i) | |
5299 | ; | |
5300 | set_fatal_syntax_error | |
5301 | (_("unexpected characters following instruction")); | |
5302 | } | |
5303 | ||
5304 | parse_operands_return: | |
5305 | ||
5306 | if (error_p ()) | |
5307 | { | |
5308 | DEBUG_TRACE ("parsing FAIL: %s - %s", | |
5309 | operand_mismatch_kind_names[get_error_kind ()], | |
5310 | get_error_message ()); | |
5311 | /* Record the operand error properly; this is useful when there | |
5312 | are multiple instruction templates for a mnemonic name, so that | |
5313 | later on, we can select the error that most closely describes | |
5314 | the problem. */ | |
5315 | record_operand_error (opcode, i, get_error_kind (), | |
5316 | get_error_message ()); | |
5317 | return FALSE; | |
5318 | } | |
5319 | else | |
5320 | { | |
5321 | DEBUG_TRACE ("parsing SUCCESS"); | |
5322 | return TRUE; | |
5323 | } | |
5324 | } | |
5325 | ||
5326 | /* It does some fix-up to provide some programmer friendly feature while | |
5327 | keeping the libopcodes happy, i.e. libopcodes only accepts | |
5328 | the preferred architectural syntax. | |
5329 | Return FALSE if there is any failure; otherwise return TRUE. */ | |
5330 | ||
5331 | static bfd_boolean | |
5332 | programmer_friendly_fixup (aarch64_instruction *instr) | |
5333 | { | |
5334 | aarch64_inst *base = &instr->base; | |
5335 | const aarch64_opcode *opcode = base->opcode; | |
5336 | enum aarch64_op op = opcode->op; | |
5337 | aarch64_opnd_info *operands = base->operands; | |
5338 | ||
5339 | DEBUG_TRACE ("enter"); | |
5340 | ||
5341 | switch (opcode->iclass) | |
5342 | { | |
5343 | case testbranch: | |
5344 | /* TBNZ Xn|Wn, #uimm6, label | |
5345 | Test and Branch Not Zero: conditionally jumps to label if bit number | |
5346 | uimm6 in register Xn is not zero. The bit number implies the width of | |
5347 | the register, which may be written and should be disassembled as Wn if | |
5348 | uimm is less than 32. */ | |
5349 | if (operands[0].qualifier == AARCH64_OPND_QLF_W) | |
5350 | { | |
5351 | if (operands[1].imm.value >= 32) | |
5352 | { | |
5353 | record_operand_out_of_range_error (opcode, 1, _("immediate value"), | |
5354 | 0, 31); | |
5355 | return FALSE; | |
5356 | } | |
5357 | operands[0].qualifier = AARCH64_OPND_QLF_X; | |
5358 | } | |
5359 | break; | |
5360 | case loadlit: | |
5361 | /* LDR Wt, label | =value | |
5362 | As a convenience assemblers will typically permit the notation | |
5363 | "=value" in conjunction with the pc-relative literal load instructions | |
5364 | to automatically place an immediate value or symbolic address in a | |
5365 | nearby literal pool and generate a hidden label which references it. | |
5366 | ISREG has been set to 0 in the case of =value. */ | |
5367 | if (instr->gen_lit_pool | |
5368 | && (op == OP_LDR_LIT || op == OP_LDRV_LIT || op == OP_LDRSW_LIT)) | |
5369 | { | |
5370 | int size = aarch64_get_qualifier_esize (operands[0].qualifier); | |
5371 | if (op == OP_LDRSW_LIT) | |
5372 | size = 4; | |
5373 | if (instr->reloc.exp.X_op != O_constant | |
67a32447 | 5374 | && instr->reloc.exp.X_op != O_big |
a06ea964 NC |
5375 | && instr->reloc.exp.X_op != O_symbol) |
5376 | { | |
5377 | record_operand_error (opcode, 1, | |
5378 | AARCH64_OPDE_FATAL_SYNTAX_ERROR, | |
5379 | _("constant expression expected")); | |
5380 | return FALSE; | |
5381 | } | |
5382 | if (! add_to_lit_pool (&instr->reloc.exp, size)) | |
5383 | { | |
5384 | record_operand_error (opcode, 1, | |
5385 | AARCH64_OPDE_OTHER_ERROR, | |
5386 | _("literal pool insertion failed")); | |
5387 | return FALSE; | |
5388 | } | |
5389 | } | |
5390 | break; | |
a06ea964 NC |
5391 | case log_shift: |
5392 | case bitfield: | |
5393 | /* UXT[BHW] Wd, Wn | |
5394 | Unsigned Extend Byte|Halfword|Word: UXT[BH] is architectural alias | |
5395 | for UBFM Wd,Wn,#0,#7|15, while UXTW is pseudo instruction which is | |
5396 | encoded using ORR Wd, WZR, Wn (MOV Wd,Wn). | |
5397 | A programmer-friendly assembler should accept a destination Xd in | |
5398 | place of Wd, however that is not the preferred form for disassembly. | |
5399 | */ | |
5400 | if ((op == OP_UXTB || op == OP_UXTH || op == OP_UXTW) | |
5401 | && operands[1].qualifier == AARCH64_OPND_QLF_W | |
5402 | && operands[0].qualifier == AARCH64_OPND_QLF_X) | |
5403 | operands[0].qualifier = AARCH64_OPND_QLF_W; | |
5404 | break; | |
5405 | ||
5406 | case addsub_ext: | |
5407 | { | |
5408 | /* In the 64-bit form, the final register operand is written as Wm | |
5409 | for all but the (possibly omitted) UXTX/LSL and SXTX | |
5410 | operators. | |
5411 | As a programmer-friendly assembler, we accept e.g. | |
5412 | ADDS <Xd>, <Xn|SP>, <Xm>{, UXTB {#<amount>}} and change it to | |
5413 | ADDS <Xd>, <Xn|SP>, <Wm>{, UXTB {#<amount>}}. */ | |
5414 | int idx = aarch64_operand_index (opcode->operands, | |
5415 | AARCH64_OPND_Rm_EXT); | |
5416 | gas_assert (idx == 1 || idx == 2); | |
5417 | if (operands[0].qualifier == AARCH64_OPND_QLF_X | |
5418 | && operands[idx].qualifier == AARCH64_OPND_QLF_X | |
5419 | && operands[idx].shifter.kind != AARCH64_MOD_LSL | |
5420 | && operands[idx].shifter.kind != AARCH64_MOD_UXTX | |
5421 | && operands[idx].shifter.kind != AARCH64_MOD_SXTX) | |
5422 | operands[idx].qualifier = AARCH64_OPND_QLF_W; | |
5423 | } | |
5424 | break; | |
5425 | ||
5426 | default: | |
5427 | break; | |
5428 | } | |
5429 | ||
5430 | DEBUG_TRACE ("exit with SUCCESS"); | |
5431 | return TRUE; | |
5432 | } | |
5433 | ||
5434 | /* A wrapper function to interface with libopcodes on encoding and | |
5435 | record the error message if there is any. | |
5436 | ||
5437 | Return TRUE on success; otherwise return FALSE. */ | |
5438 | ||
5439 | static bfd_boolean | |
5440 | do_encode (const aarch64_opcode *opcode, aarch64_inst *instr, | |
5441 | aarch64_insn *code) | |
5442 | { | |
5443 | aarch64_operand_error error_info; | |
5444 | error_info.kind = AARCH64_OPDE_NIL; | |
5445 | if (aarch64_opcode_encode (opcode, instr, code, NULL, &error_info)) | |
5446 | return TRUE; | |
5447 | else | |
5448 | { | |
5449 | gas_assert (error_info.kind != AARCH64_OPDE_NIL); | |
5450 | record_operand_error_info (opcode, &error_info); | |
5451 | return FALSE; | |
5452 | } | |
5453 | } | |
5454 | ||
5455 | #ifdef DEBUG_AARCH64 | |
5456 | static inline void | |
5457 | dump_opcode_operands (const aarch64_opcode *opcode) | |
5458 | { | |
5459 | int i = 0; | |
5460 | while (opcode->operands[i] != AARCH64_OPND_NIL) | |
5461 | { | |
5462 | aarch64_verbose ("\t\t opnd%d: %s", i, | |
5463 | aarch64_get_operand_name (opcode->operands[i])[0] != '\0' | |
5464 | ? aarch64_get_operand_name (opcode->operands[i]) | |
5465 | : aarch64_get_operand_desc (opcode->operands[i])); | |
5466 | ++i; | |
5467 | } | |
5468 | } | |
5469 | #endif /* DEBUG_AARCH64 */ | |
5470 | ||
5471 | /* This is the guts of the machine-dependent assembler. STR points to a | |
5472 | machine dependent instruction. This function is supposed to emit | |
5473 | the frags/bytes it assembles to. */ | |
5474 | ||
5475 | void | |
5476 | md_assemble (char *str) | |
5477 | { | |
5478 | char *p = str; | |
5479 | templates *template; | |
5480 | aarch64_opcode *opcode; | |
5481 | aarch64_inst *inst_base; | |
5482 | unsigned saved_cond; | |
5483 | ||
5484 | /* Align the previous label if needed. */ | |
5485 | if (last_label_seen != NULL) | |
5486 | { | |
5487 | symbol_set_frag (last_label_seen, frag_now); | |
5488 | S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ()); | |
5489 | S_SET_SEGMENT (last_label_seen, now_seg); | |
5490 | } | |
5491 | ||
5492 | inst.reloc.type = BFD_RELOC_UNUSED; | |
5493 | ||
5494 | DEBUG_TRACE ("\n\n"); | |
5495 | DEBUG_TRACE ("=============================="); | |
5496 | DEBUG_TRACE ("Enter md_assemble with %s", str); | |
5497 | ||
5498 | template = opcode_lookup (&p); | |
5499 | if (!template) | |
5500 | { | |
5501 | /* It wasn't an instruction, but it might be a register alias of | |
5502 | the form alias .req reg directive. */ | |
5503 | if (!create_register_alias (str, p)) | |
5504 | as_bad (_("unknown mnemonic `%s' -- `%s'"), get_mnemonic_name (str), | |
5505 | str); | |
5506 | return; | |
5507 | } | |
5508 | ||
5509 | skip_whitespace (p); | |
5510 | if (*p == ',') | |
5511 | { | |
5512 | as_bad (_("unexpected comma after the mnemonic name `%s' -- `%s'"), | |
5513 | get_mnemonic_name (str), str); | |
5514 | return; | |
5515 | } | |
5516 | ||
5517 | init_operand_error_report (); | |
5518 | ||
5519 | saved_cond = inst.cond; | |
5520 | reset_aarch64_instruction (&inst); | |
5521 | inst.cond = saved_cond; | |
5522 | ||
5523 | /* Iterate through all opcode entries with the same mnemonic name. */ | |
5524 | do | |
5525 | { | |
5526 | opcode = template->opcode; | |
5527 | ||
5528 | DEBUG_TRACE ("opcode %s found", opcode->name); | |
5529 | #ifdef DEBUG_AARCH64 | |
5530 | if (debug_dump) | |
5531 | dump_opcode_operands (opcode); | |
5532 | #endif /* DEBUG_AARCH64 */ | |
5533 | ||
a06ea964 NC |
5534 | mapping_state (MAP_INSN); |
5535 | ||
5536 | inst_base = &inst.base; | |
5537 | inst_base->opcode = opcode; | |
5538 | ||
5539 | /* Truly conditionally executed instructions, e.g. b.cond. */ | |
5540 | if (opcode->flags & F_COND) | |
5541 | { | |
5542 | gas_assert (inst.cond != COND_ALWAYS); | |
5543 | inst_base->cond = get_cond_from_value (inst.cond); | |
5544 | DEBUG_TRACE ("condition found %s", inst_base->cond->names[0]); | |
5545 | } | |
5546 | else if (inst.cond != COND_ALWAYS) | |
5547 | { | |
5548 | /* It shouldn't arrive here, where the assembly looks like a | |
5549 | conditional instruction but the found opcode is unconditional. */ | |
5550 | gas_assert (0); | |
5551 | continue; | |
5552 | } | |
5553 | ||
5554 | if (parse_operands (p, opcode) | |
5555 | && programmer_friendly_fixup (&inst) | |
5556 | && do_encode (inst_base->opcode, &inst.base, &inst_base->value)) | |
5557 | { | |
3f06bfce YZ |
5558 | /* Check that this instruction is supported for this CPU. */ |
5559 | if (!opcode->avariant | |
5560 | || !AARCH64_CPU_HAS_FEATURE (cpu_variant, *opcode->avariant)) | |
5561 | { | |
5562 | as_bad (_("selected processor does not support `%s'"), str); | |
5563 | return; | |
5564 | } | |
5565 | ||
a06ea964 NC |
5566 | if (inst.reloc.type == BFD_RELOC_UNUSED |
5567 | || !inst.reloc.need_libopcodes_p) | |
5568 | output_inst (NULL); | |
5569 | else | |
5570 | { | |
5571 | /* If there is relocation generated for the instruction, | |
5572 | store the instruction information for the future fix-up. */ | |
5573 | struct aarch64_inst *copy; | |
5574 | gas_assert (inst.reloc.type != BFD_RELOC_UNUSED); | |
5575 | if ((copy = xmalloc (sizeof (struct aarch64_inst))) == NULL) | |
5576 | abort (); | |
5577 | memcpy (copy, &inst.base, sizeof (struct aarch64_inst)); | |
5578 | output_inst (copy); | |
5579 | } | |
5580 | return; | |
5581 | } | |
5582 | ||
5583 | template = template->next; | |
5584 | if (template != NULL) | |
5585 | { | |
5586 | reset_aarch64_instruction (&inst); | |
5587 | inst.cond = saved_cond; | |
5588 | } | |
5589 | } | |
5590 | while (template != NULL); | |
5591 | ||
5592 | /* Issue the error messages if any. */ | |
5593 | output_operand_error_report (str); | |
5594 | } | |
5595 | ||
5596 | /* Various frobbings of labels and their addresses. */ | |
5597 | ||
5598 | void | |
5599 | aarch64_start_line_hook (void) | |
5600 | { | |
5601 | last_label_seen = NULL; | |
5602 | } | |
5603 | ||
5604 | void | |
5605 | aarch64_frob_label (symbolS * sym) | |
5606 | { | |
5607 | last_label_seen = sym; | |
5608 | ||
5609 | dwarf2_emit_label (sym); | |
5610 | } | |
5611 | ||
5612 | int | |
5613 | aarch64_data_in_code (void) | |
5614 | { | |
5615 | if (!strncmp (input_line_pointer + 1, "data:", 5)) | |
5616 | { | |
5617 | *input_line_pointer = '/'; | |
5618 | input_line_pointer += 5; | |
5619 | *input_line_pointer = 0; | |
5620 | return 1; | |
5621 | } | |
5622 | ||
5623 | return 0; | |
5624 | } | |
5625 | ||
5626 | char * | |
5627 | aarch64_canonicalize_symbol_name (char *name) | |
5628 | { | |
5629 | int len; | |
5630 | ||
5631 | if ((len = strlen (name)) > 5 && streq (name + len - 5, "/data")) | |
5632 | *(name + len - 5) = 0; | |
5633 | ||
5634 | return name; | |
5635 | } | |
5636 | \f | |
5637 | /* Table of all register names defined by default. The user can | |
5638 | define additional names with .req. Note that all register names | |
5639 | should appear in both upper and lowercase variants. Some registers | |
5640 | also have mixed-case names. */ | |
5641 | ||
5642 | #define REGDEF(s,n,t) { #s, n, REG_TYPE_##t, TRUE } | |
5643 | #define REGNUM(p,n,t) REGDEF(p##n, n, t) | |
5644 | #define REGSET31(p,t) \ | |
5645 | REGNUM(p, 0,t), REGNUM(p, 1,t), REGNUM(p, 2,t), REGNUM(p, 3,t), \ | |
5646 | REGNUM(p, 4,t), REGNUM(p, 5,t), REGNUM(p, 6,t), REGNUM(p, 7,t), \ | |
5647 | REGNUM(p, 8,t), REGNUM(p, 9,t), REGNUM(p,10,t), REGNUM(p,11,t), \ | |
5648 | REGNUM(p,12,t), REGNUM(p,13,t), REGNUM(p,14,t), REGNUM(p,15,t), \ | |
5649 | REGNUM(p,16,t), REGNUM(p,17,t), REGNUM(p,18,t), REGNUM(p,19,t), \ | |
5650 | REGNUM(p,20,t), REGNUM(p,21,t), REGNUM(p,22,t), REGNUM(p,23,t), \ | |
5651 | REGNUM(p,24,t), REGNUM(p,25,t), REGNUM(p,26,t), REGNUM(p,27,t), \ | |
5652 | REGNUM(p,28,t), REGNUM(p,29,t), REGNUM(p,30,t) | |
5653 | #define REGSET(p,t) \ | |
5654 | REGSET31(p,t), REGNUM(p,31,t) | |
5655 | ||
5656 | /* These go into aarch64_reg_hsh hash-table. */ | |
5657 | static const reg_entry reg_names[] = { | |
5658 | /* Integer registers. */ | |
5659 | REGSET31 (x, R_64), REGSET31 (X, R_64), | |
5660 | REGSET31 (w, R_32), REGSET31 (W, R_32), | |
5661 | ||
5662 | REGDEF (wsp, 31, SP_32), REGDEF (WSP, 31, SP_32), | |
5663 | REGDEF (sp, 31, SP_64), REGDEF (SP, 31, SP_64), | |
5664 | ||
5665 | REGDEF (wzr, 31, Z_32), REGDEF (WZR, 31, Z_32), | |
5666 | REGDEF (xzr, 31, Z_64), REGDEF (XZR, 31, Z_64), | |
5667 | ||
5668 | /* Coprocessor register numbers. */ | |
5669 | REGSET (c, CN), REGSET (C, CN), | |
5670 | ||
5671 | /* Floating-point single precision registers. */ | |
5672 | REGSET (s, FP_S), REGSET (S, FP_S), | |
5673 | ||
5674 | /* Floating-point double precision registers. */ | |
5675 | REGSET (d, FP_D), REGSET (D, FP_D), | |
5676 | ||
5677 | /* Floating-point half precision registers. */ | |
5678 | REGSET (h, FP_H), REGSET (H, FP_H), | |
5679 | ||
5680 | /* Floating-point byte precision registers. */ | |
5681 | REGSET (b, FP_B), REGSET (B, FP_B), | |
5682 | ||
5683 | /* Floating-point quad precision registers. */ | |
5684 | REGSET (q, FP_Q), REGSET (Q, FP_Q), | |
5685 | ||
5686 | /* FP/SIMD registers. */ | |
5687 | REGSET (v, VN), REGSET (V, VN), | |
5688 | }; | |
5689 | ||
5690 | #undef REGDEF | |
5691 | #undef REGNUM | |
5692 | #undef REGSET | |
5693 | ||
5694 | #define N 1 | |
5695 | #define n 0 | |
5696 | #define Z 1 | |
5697 | #define z 0 | |
5698 | #define C 1 | |
5699 | #define c 0 | |
5700 | #define V 1 | |
5701 | #define v 0 | |
5702 | #define B(a,b,c,d) (((a) << 3) | ((b) << 2) | ((c) << 1) | (d)) | |
5703 | static const asm_nzcv nzcv_names[] = { | |
5704 | {"nzcv", B (n, z, c, v)}, | |
5705 | {"nzcV", B (n, z, c, V)}, | |
5706 | {"nzCv", B (n, z, C, v)}, | |
5707 | {"nzCV", B (n, z, C, V)}, | |
5708 | {"nZcv", B (n, Z, c, v)}, | |
5709 | {"nZcV", B (n, Z, c, V)}, | |
5710 | {"nZCv", B (n, Z, C, v)}, | |
5711 | {"nZCV", B (n, Z, C, V)}, | |
5712 | {"Nzcv", B (N, z, c, v)}, | |
5713 | {"NzcV", B (N, z, c, V)}, | |
5714 | {"NzCv", B (N, z, C, v)}, | |
5715 | {"NzCV", B (N, z, C, V)}, | |
5716 | {"NZcv", B (N, Z, c, v)}, | |
5717 | {"NZcV", B (N, Z, c, V)}, | |
5718 | {"NZCv", B (N, Z, C, v)}, | |
5719 | {"NZCV", B (N, Z, C, V)} | |
5720 | }; | |
5721 | ||
5722 | #undef N | |
5723 | #undef n | |
5724 | #undef Z | |
5725 | #undef z | |
5726 | #undef C | |
5727 | #undef c | |
5728 | #undef V | |
5729 | #undef v | |
5730 | #undef B | |
5731 | \f | |
5732 | /* MD interface: bits in the object file. */ | |
5733 | ||
5734 | /* Turn an integer of n bytes (in val) into a stream of bytes appropriate | |
5735 | for use in the a.out file, and stores them in the array pointed to by buf. | |
5736 | This knows about the endian-ness of the target machine and does | |
5737 | THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) | |
5738 | 2 (short) and 4 (long) Floating numbers are put out as a series of | |
5739 | LITTLENUMS (shorts, here at least). */ | |
5740 | ||
5741 | void | |
5742 | md_number_to_chars (char *buf, valueT val, int n) | |
5743 | { | |
5744 | if (target_big_endian) | |
5745 | number_to_chars_bigendian (buf, val, n); | |
5746 | else | |
5747 | number_to_chars_littleendian (buf, val, n); | |
5748 | } | |
5749 | ||
5750 | /* MD interface: Sections. */ | |
5751 | ||
5752 | /* Estimate the size of a frag before relaxing. Assume everything fits in | |
5753 | 4 bytes. */ | |
5754 | ||
5755 | int | |
5756 | md_estimate_size_before_relax (fragS * fragp, segT segtype ATTRIBUTE_UNUSED) | |
5757 | { | |
5758 | fragp->fr_var = 4; | |
5759 | return 4; | |
5760 | } | |
5761 | ||
5762 | /* Round up a section size to the appropriate boundary. */ | |
5763 | ||
5764 | valueT | |
5765 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) | |
5766 | { | |
5767 | return size; | |
5768 | } | |
5769 | ||
5770 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents | |
5771 | of an rs_align_code fragment. */ | |
5772 | ||
5773 | void | |
5774 | aarch64_handle_align (fragS * fragP) | |
5775 | { | |
5776 | /* NOP = d503201f */ | |
5777 | /* AArch64 instructions are always little-endian. */ | |
5778 | static char const aarch64_noop[4] = { 0x1f, 0x20, 0x03, 0xd5 }; | |
5779 | ||
5780 | int bytes, fix, noop_size; | |
5781 | char *p; | |
5782 | const char *noop; | |
5783 | ||
5784 | if (fragP->fr_type != rs_align_code) | |
5785 | return; | |
5786 | ||
5787 | bytes = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix; | |
5788 | p = fragP->fr_literal + fragP->fr_fix; | |
5789 | fix = 0; | |
5790 | ||
5791 | if (bytes > MAX_MEM_FOR_RS_ALIGN_CODE) | |
5792 | bytes &= MAX_MEM_FOR_RS_ALIGN_CODE; | |
5793 | ||
5794 | #ifdef OBJ_ELF | |
5795 | gas_assert (fragP->tc_frag_data.recorded); | |
5796 | #endif | |
5797 | ||
5798 | noop = aarch64_noop; | |
5799 | noop_size = sizeof (aarch64_noop); | |
5800 | fragP->fr_var = noop_size; | |
5801 | ||
5802 | if (bytes & (noop_size - 1)) | |
5803 | { | |
5804 | fix = bytes & (noop_size - 1); | |
5805 | #ifdef OBJ_ELF | |
5806 | insert_data_mapping_symbol (MAP_INSN, fragP->fr_fix, fragP, fix); | |
5807 | #endif | |
5808 | memset (p, 0, fix); | |
5809 | p += fix; | |
5810 | bytes -= fix; | |
5811 | } | |
5812 | ||
5813 | while (bytes >= noop_size) | |
5814 | { | |
5815 | memcpy (p, noop, noop_size); | |
5816 | p += noop_size; | |
5817 | bytes -= noop_size; | |
5818 | fix += noop_size; | |
5819 | } | |
5820 | ||
5821 | fragP->fr_fix += fix; | |
5822 | } | |
5823 | ||
5824 | /* Called from md_do_align. Used to create an alignment | |
5825 | frag in a code section. */ | |
5826 | ||
5827 | void | |
5828 | aarch64_frag_align_code (int n, int max) | |
5829 | { | |
5830 | char *p; | |
5831 | ||
5832 | /* We assume that there will never be a requirement | |
5833 | to support alignments greater than x bytes. */ | |
5834 | if (max > MAX_MEM_FOR_RS_ALIGN_CODE) | |
5835 | as_fatal (_ | |
5836 | ("alignments greater than %d bytes not supported in .text sections"), | |
5837 | MAX_MEM_FOR_RS_ALIGN_CODE + 1); | |
5838 | ||
5839 | p = frag_var (rs_align_code, | |
5840 | MAX_MEM_FOR_RS_ALIGN_CODE, | |
5841 | 1, | |
5842 | (relax_substateT) max, | |
5843 | (symbolS *) NULL, (offsetT) n, (char *) NULL); | |
5844 | *p = 0; | |
5845 | } | |
5846 | ||
5847 | /* Perform target specific initialisation of a frag. | |
5848 | Note - despite the name this initialisation is not done when the frag | |
5849 | is created, but only when its type is assigned. A frag can be created | |
5850 | and used a long time before its type is set, so beware of assuming that | |
5851 | this initialisationis performed first. */ | |
5852 | ||
5853 | #ifndef OBJ_ELF | |
5854 | void | |
5855 | aarch64_init_frag (fragS * fragP ATTRIBUTE_UNUSED, | |
5856 | int max_chars ATTRIBUTE_UNUSED) | |
5857 | { | |
5858 | } | |
5859 | ||
5860 | #else /* OBJ_ELF is defined. */ | |
5861 | void | |
5862 | aarch64_init_frag (fragS * fragP, int max_chars) | |
5863 | { | |
5864 | /* Record a mapping symbol for alignment frags. We will delete this | |
5865 | later if the alignment ends up empty. */ | |
5866 | if (!fragP->tc_frag_data.recorded) | |
5867 | { | |
5868 | fragP->tc_frag_data.recorded = 1; | |
5869 | switch (fragP->fr_type) | |
5870 | { | |
5871 | case rs_align: | |
5872 | case rs_align_test: | |
5873 | case rs_fill: | |
5874 | mapping_state_2 (MAP_DATA, max_chars); | |
5875 | break; | |
5876 | case rs_align_code: | |
5877 | mapping_state_2 (MAP_INSN, max_chars); | |
5878 | break; | |
5879 | default: | |
5880 | break; | |
5881 | } | |
5882 | } | |
5883 | } | |
5884 | \f | |
5885 | /* Initialize the DWARF-2 unwind information for this procedure. */ | |
5886 | ||
5887 | void | |
5888 | tc_aarch64_frame_initial_instructions (void) | |
5889 | { | |
5890 | cfi_add_CFA_def_cfa (REG_SP, 0); | |
5891 | } | |
5892 | #endif /* OBJ_ELF */ | |
5893 | ||
5894 | /* Convert REGNAME to a DWARF-2 register number. */ | |
5895 | ||
5896 | int | |
5897 | tc_aarch64_regname_to_dw2regnum (char *regname) | |
5898 | { | |
5899 | const reg_entry *reg = parse_reg (®name); | |
5900 | if (reg == NULL) | |
5901 | return -1; | |
5902 | ||
5903 | switch (reg->type) | |
5904 | { | |
5905 | case REG_TYPE_SP_32: | |
5906 | case REG_TYPE_SP_64: | |
5907 | case REG_TYPE_R_32: | |
5908 | case REG_TYPE_R_64: | |
5909 | case REG_TYPE_FP_B: | |
5910 | case REG_TYPE_FP_H: | |
5911 | case REG_TYPE_FP_S: | |
5912 | case REG_TYPE_FP_D: | |
5913 | case REG_TYPE_FP_Q: | |
5914 | return reg->number; | |
5915 | default: | |
5916 | break; | |
5917 | } | |
5918 | return -1; | |
5919 | } | |
5920 | ||
cec5225b YZ |
5921 | /* Implement DWARF2_ADDR_SIZE. */ |
5922 | ||
5923 | int | |
5924 | aarch64_dwarf2_addr_size (void) | |
5925 | { | |
5926 | #if defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF) | |
5927 | if (ilp32_p) | |
5928 | return 4; | |
5929 | #endif | |
5930 | return bfd_arch_bits_per_address (stdoutput) / 8; | |
5931 | } | |
5932 | ||
a06ea964 NC |
5933 | /* MD interface: Symbol and relocation handling. */ |
5934 | ||
5935 | /* Return the address within the segment that a PC-relative fixup is | |
5936 | relative to. For AArch64 PC-relative fixups applied to instructions | |
5937 | are generally relative to the location plus AARCH64_PCREL_OFFSET bytes. */ | |
5938 | ||
5939 | long | |
5940 | md_pcrel_from_section (fixS * fixP, segT seg) | |
5941 | { | |
5942 | offsetT base = fixP->fx_where + fixP->fx_frag->fr_address; | |
5943 | ||
5944 | /* If this is pc-relative and we are going to emit a relocation | |
5945 | then we just want to put out any pipeline compensation that the linker | |
5946 | will need. Otherwise we want to use the calculated base. */ | |
5947 | if (fixP->fx_pcrel | |
5948 | && ((fixP->fx_addsy && S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
5949 | || aarch64_force_relocation (fixP))) | |
5950 | base = 0; | |
5951 | ||
5952 | /* AArch64 should be consistent for all pc-relative relocations. */ | |
5953 | return base + AARCH64_PCREL_OFFSET; | |
5954 | } | |
5955 | ||
5956 | /* Under ELF we need to default _GLOBAL_OFFSET_TABLE. | |
5957 | Otherwise we have no need to default values of symbols. */ | |
5958 | ||
5959 | symbolS * | |
5960 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
5961 | { | |
5962 | #ifdef OBJ_ELF | |
5963 | if (name[0] == '_' && name[1] == 'G' | |
5964 | && streq (name, GLOBAL_OFFSET_TABLE_NAME)) | |
5965 | { | |
5966 | if (!GOT_symbol) | |
5967 | { | |
5968 | if (symbol_find (name)) | |
5969 | as_bad (_("GOT already in the symbol table")); | |
5970 | ||
5971 | GOT_symbol = symbol_new (name, undefined_section, | |
5972 | (valueT) 0, &zero_address_frag); | |
5973 | } | |
5974 | ||
5975 | return GOT_symbol; | |
5976 | } | |
5977 | #endif | |
5978 | ||
5979 | return 0; | |
5980 | } | |
5981 | ||
5982 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
5983 | range expressible by a unsigned number with the indicated number of | |
5984 | BITS. */ | |
5985 | ||
5986 | static bfd_boolean | |
5987 | unsigned_overflow (valueT value, unsigned bits) | |
5988 | { | |
5989 | valueT lim; | |
5990 | if (bits >= sizeof (valueT) * 8) | |
5991 | return FALSE; | |
5992 | lim = (valueT) 1 << bits; | |
5993 | return (value >= lim); | |
5994 | } | |
5995 | ||
5996 | ||
5997 | /* Return non-zero if the indicated VALUE has overflowed the maximum | |
5998 | range expressible by an signed number with the indicated number of | |
5999 | BITS. */ | |
6000 | ||
6001 | static bfd_boolean | |
6002 | signed_overflow (offsetT value, unsigned bits) | |
6003 | { | |
6004 | offsetT lim; | |
6005 | if (bits >= sizeof (offsetT) * 8) | |
6006 | return FALSE; | |
6007 | lim = (offsetT) 1 << (bits - 1); | |
6008 | return (value < -lim || value >= lim); | |
6009 | } | |
6010 | ||
6011 | /* Given an instruction in *INST, which is expected to be a scaled, 12-bit, | |
6012 | unsigned immediate offset load/store instruction, try to encode it as | |
6013 | an unscaled, 9-bit, signed immediate offset load/store instruction. | |
6014 | Return TRUE if it is successful; otherwise return FALSE. | |
6015 | ||
6016 | As a programmer-friendly assembler, LDUR/STUR instructions can be generated | |
6017 | in response to the standard LDR/STR mnemonics when the immediate offset is | |
6018 | unambiguous, i.e. when it is negative or unaligned. */ | |
6019 | ||
6020 | static bfd_boolean | |
6021 | try_to_encode_as_unscaled_ldst (aarch64_inst *instr) | |
6022 | { | |
6023 | int idx; | |
6024 | enum aarch64_op new_op; | |
6025 | const aarch64_opcode *new_opcode; | |
6026 | ||
6027 | gas_assert (instr->opcode->iclass == ldst_pos); | |
6028 | ||
6029 | switch (instr->opcode->op) | |
6030 | { | |
6031 | case OP_LDRB_POS:new_op = OP_LDURB; break; | |
6032 | case OP_STRB_POS: new_op = OP_STURB; break; | |
6033 | case OP_LDRSB_POS: new_op = OP_LDURSB; break; | |
6034 | case OP_LDRH_POS: new_op = OP_LDURH; break; | |
6035 | case OP_STRH_POS: new_op = OP_STURH; break; | |
6036 | case OP_LDRSH_POS: new_op = OP_LDURSH; break; | |
6037 | case OP_LDR_POS: new_op = OP_LDUR; break; | |
6038 | case OP_STR_POS: new_op = OP_STUR; break; | |
6039 | case OP_LDRF_POS: new_op = OP_LDURV; break; | |
6040 | case OP_STRF_POS: new_op = OP_STURV; break; | |
6041 | case OP_LDRSW_POS: new_op = OP_LDURSW; break; | |
6042 | case OP_PRFM_POS: new_op = OP_PRFUM; break; | |
6043 | default: new_op = OP_NIL; break; | |
6044 | } | |
6045 | ||
6046 | if (new_op == OP_NIL) | |
6047 | return FALSE; | |
6048 | ||
6049 | new_opcode = aarch64_get_opcode (new_op); | |
6050 | gas_assert (new_opcode != NULL); | |
6051 | ||
6052 | DEBUG_TRACE ("Check programmer-friendly STURB/LDURB -> STRB/LDRB: %d == %d", | |
6053 | instr->opcode->op, new_opcode->op); | |
6054 | ||
6055 | aarch64_replace_opcode (instr, new_opcode); | |
6056 | ||
6057 | /* Clear up the ADDR_SIMM9's qualifier; otherwise the | |
6058 | qualifier matching may fail because the out-of-date qualifier will | |
6059 | prevent the operand being updated with a new and correct qualifier. */ | |
6060 | idx = aarch64_operand_index (instr->opcode->operands, | |
6061 | AARCH64_OPND_ADDR_SIMM9); | |
6062 | gas_assert (idx == 1); | |
6063 | instr->operands[idx].qualifier = AARCH64_OPND_QLF_NIL; | |
6064 | ||
6065 | DEBUG_TRACE ("Found LDURB entry to encode programmer-friendly LDRB"); | |
6066 | ||
6067 | if (!aarch64_opcode_encode (instr->opcode, instr, &instr->value, NULL, NULL)) | |
6068 | return FALSE; | |
6069 | ||
6070 | return TRUE; | |
6071 | } | |
6072 | ||
6073 | /* Called by fix_insn to fix a MOV immediate alias instruction. | |
6074 | ||
6075 | Operand for a generic move immediate instruction, which is an alias | |
6076 | instruction that generates a single MOVZ, MOVN or ORR instruction to loads | |
6077 | a 32-bit/64-bit immediate value into general register. An assembler error | |
6078 | shall result if the immediate cannot be created by a single one of these | |
6079 | instructions. If there is a choice, then to ensure reversability an | |
6080 | assembler must prefer a MOVZ to MOVN, and MOVZ or MOVN to ORR. */ | |
6081 | ||
6082 | static void | |
6083 | fix_mov_imm_insn (fixS *fixP, char *buf, aarch64_inst *instr, offsetT value) | |
6084 | { | |
6085 | const aarch64_opcode *opcode; | |
6086 | ||
6087 | /* Need to check if the destination is SP/ZR. The check has to be done | |
6088 | before any aarch64_replace_opcode. */ | |
6089 | int try_mov_wide_p = !aarch64_stack_pointer_p (&instr->operands[0]); | |
6090 | int try_mov_bitmask_p = !aarch64_zero_register_p (&instr->operands[0]); | |
6091 | ||
6092 | instr->operands[1].imm.value = value; | |
6093 | instr->operands[1].skip = 0; | |
6094 | ||
6095 | if (try_mov_wide_p) | |
6096 | { | |
6097 | /* Try the MOVZ alias. */ | |
6098 | opcode = aarch64_get_opcode (OP_MOV_IMM_WIDE); | |
6099 | aarch64_replace_opcode (instr, opcode); | |
6100 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6101 | &instr->value, NULL, NULL)) | |
6102 | { | |
6103 | put_aarch64_insn (buf, instr->value); | |
6104 | return; | |
6105 | } | |
6106 | /* Try the MOVK alias. */ | |
6107 | opcode = aarch64_get_opcode (OP_MOV_IMM_WIDEN); | |
6108 | aarch64_replace_opcode (instr, opcode); | |
6109 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6110 | &instr->value, NULL, NULL)) | |
6111 | { | |
6112 | put_aarch64_insn (buf, instr->value); | |
6113 | return; | |
6114 | } | |
6115 | } | |
6116 | ||
6117 | if (try_mov_bitmask_p) | |
6118 | { | |
6119 | /* Try the ORR alias. */ | |
6120 | opcode = aarch64_get_opcode (OP_MOV_IMM_LOG); | |
6121 | aarch64_replace_opcode (instr, opcode); | |
6122 | if (aarch64_opcode_encode (instr->opcode, instr, | |
6123 | &instr->value, NULL, NULL)) | |
6124 | { | |
6125 | put_aarch64_insn (buf, instr->value); | |
6126 | return; | |
6127 | } | |
6128 | } | |
6129 | ||
6130 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6131 | _("immediate cannot be moved by a single instruction")); | |
6132 | } | |
6133 | ||
6134 | /* An instruction operand which is immediate related may have symbol used | |
6135 | in the assembly, e.g. | |
6136 | ||
6137 | mov w0, u32 | |
6138 | .set u32, 0x00ffff00 | |
6139 | ||
6140 | At the time when the assembly instruction is parsed, a referenced symbol, | |
6141 | like 'u32' in the above example may not have been seen; a fixS is created | |
6142 | in such a case and is handled here after symbols have been resolved. | |
6143 | Instruction is fixed up with VALUE using the information in *FIXP plus | |
6144 | extra information in FLAGS. | |
6145 | ||
6146 | This function is called by md_apply_fix to fix up instructions that need | |
6147 | a fix-up described above but does not involve any linker-time relocation. */ | |
6148 | ||
6149 | static void | |
6150 | fix_insn (fixS *fixP, uint32_t flags, offsetT value) | |
6151 | { | |
6152 | int idx; | |
6153 | uint32_t insn; | |
6154 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
6155 | enum aarch64_opnd opnd = fixP->tc_fix_data.opnd; | |
6156 | aarch64_inst *new_inst = fixP->tc_fix_data.inst; | |
6157 | ||
6158 | if (new_inst) | |
6159 | { | |
6160 | /* Now the instruction is about to be fixed-up, so the operand that | |
6161 | was previously marked as 'ignored' needs to be unmarked in order | |
6162 | to get the encoding done properly. */ | |
6163 | idx = aarch64_operand_index (new_inst->opcode->operands, opnd); | |
6164 | new_inst->operands[idx].skip = 0; | |
6165 | } | |
6166 | ||
6167 | gas_assert (opnd != AARCH64_OPND_NIL); | |
6168 | ||
6169 | switch (opnd) | |
6170 | { | |
6171 | case AARCH64_OPND_EXCEPTION: | |
6172 | if (unsigned_overflow (value, 16)) | |
6173 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6174 | _("immediate out of range")); | |
6175 | insn = get_aarch64_insn (buf); | |
6176 | insn |= encode_svc_imm (value); | |
6177 | put_aarch64_insn (buf, insn); | |
6178 | break; | |
6179 | ||
6180 | case AARCH64_OPND_AIMM: | |
6181 | /* ADD or SUB with immediate. | |
6182 | NOTE this assumes we come here with a add/sub shifted reg encoding | |
6183 | 3 322|2222|2 2 2 21111 111111 | |
6184 | 1 098|7654|3 2 1 09876 543210 98765 43210 | |
6185 | 0b000000 sf 000|1011|shift 0 Rm imm6 Rn Rd ADD | |
6186 | 2b000000 sf 010|1011|shift 0 Rm imm6 Rn Rd ADDS | |
6187 | 4b000000 sf 100|1011|shift 0 Rm imm6 Rn Rd SUB | |
6188 | 6b000000 sf 110|1011|shift 0 Rm imm6 Rn Rd SUBS | |
6189 | -> | |
6190 | 3 322|2222|2 2 221111111111 | |
6191 | 1 098|7654|3 2 109876543210 98765 43210 | |
6192 | 11000000 sf 001|0001|shift imm12 Rn Rd ADD | |
6193 | 31000000 sf 011|0001|shift imm12 Rn Rd ADDS | |
6194 | 51000000 sf 101|0001|shift imm12 Rn Rd SUB | |
6195 | 71000000 sf 111|0001|shift imm12 Rn Rd SUBS | |
6196 | Fields sf Rn Rd are already set. */ | |
6197 | insn = get_aarch64_insn (buf); | |
6198 | if (value < 0) | |
6199 | { | |
6200 | /* Add <-> sub. */ | |
6201 | insn = reencode_addsub_switch_add_sub (insn); | |
6202 | value = -value; | |
6203 | } | |
6204 | ||
6205 | if ((flags & FIXUP_F_HAS_EXPLICIT_SHIFT) == 0 | |
6206 | && unsigned_overflow (value, 12)) | |
6207 | { | |
6208 | /* Try to shift the value by 12 to make it fit. */ | |
6209 | if (((value >> 12) << 12) == value | |
6210 | && ! unsigned_overflow (value, 12 + 12)) | |
6211 | { | |
6212 | value >>= 12; | |
6213 | insn |= encode_addsub_imm_shift_amount (1); | |
6214 | } | |
6215 | } | |
6216 | ||
6217 | if (unsigned_overflow (value, 12)) | |
6218 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6219 | _("immediate out of range")); | |
6220 | ||
6221 | insn |= encode_addsub_imm (value); | |
6222 | ||
6223 | put_aarch64_insn (buf, insn); | |
6224 | break; | |
6225 | ||
6226 | case AARCH64_OPND_SIMD_IMM: | |
6227 | case AARCH64_OPND_SIMD_IMM_SFT: | |
6228 | case AARCH64_OPND_LIMM: | |
6229 | /* Bit mask immediate. */ | |
6230 | gas_assert (new_inst != NULL); | |
6231 | idx = aarch64_operand_index (new_inst->opcode->operands, opnd); | |
6232 | new_inst->operands[idx].imm.value = value; | |
6233 | if (aarch64_opcode_encode (new_inst->opcode, new_inst, | |
6234 | &new_inst->value, NULL, NULL)) | |
6235 | put_aarch64_insn (buf, new_inst->value); | |
6236 | else | |
6237 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6238 | _("invalid immediate")); | |
6239 | break; | |
6240 | ||
6241 | case AARCH64_OPND_HALF: | |
6242 | /* 16-bit unsigned immediate. */ | |
6243 | if (unsigned_overflow (value, 16)) | |
6244 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6245 | _("immediate out of range")); | |
6246 | insn = get_aarch64_insn (buf); | |
6247 | insn |= encode_movw_imm (value & 0xffff); | |
6248 | put_aarch64_insn (buf, insn); | |
6249 | break; | |
6250 | ||
6251 | case AARCH64_OPND_IMM_MOV: | |
6252 | /* Operand for a generic move immediate instruction, which is | |
6253 | an alias instruction that generates a single MOVZ, MOVN or ORR | |
6254 | instruction to loads a 32-bit/64-bit immediate value into general | |
6255 | register. An assembler error shall result if the immediate cannot be | |
6256 | created by a single one of these instructions. If there is a choice, | |
6257 | then to ensure reversability an assembler must prefer a MOVZ to MOVN, | |
6258 | and MOVZ or MOVN to ORR. */ | |
6259 | gas_assert (new_inst != NULL); | |
6260 | fix_mov_imm_insn (fixP, buf, new_inst, value); | |
6261 | break; | |
6262 | ||
6263 | case AARCH64_OPND_ADDR_SIMM7: | |
6264 | case AARCH64_OPND_ADDR_SIMM9: | |
6265 | case AARCH64_OPND_ADDR_SIMM9_2: | |
6266 | case AARCH64_OPND_ADDR_UIMM12: | |
6267 | /* Immediate offset in an address. */ | |
6268 | insn = get_aarch64_insn (buf); | |
6269 | ||
6270 | gas_assert (new_inst != NULL && new_inst->value == insn); | |
6271 | gas_assert (new_inst->opcode->operands[1] == opnd | |
6272 | || new_inst->opcode->operands[2] == opnd); | |
6273 | ||
6274 | /* Get the index of the address operand. */ | |
6275 | if (new_inst->opcode->operands[1] == opnd) | |
6276 | /* e.g. STR <Xt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
6277 | idx = 1; | |
6278 | else | |
6279 | /* e.g. LDP <Qt1>, <Qt2>, [<Xn|SP>{, #<imm>}]. */ | |
6280 | idx = 2; | |
6281 | ||
6282 | /* Update the resolved offset value. */ | |
6283 | new_inst->operands[idx].addr.offset.imm = value; | |
6284 | ||
6285 | /* Encode/fix-up. */ | |
6286 | if (aarch64_opcode_encode (new_inst->opcode, new_inst, | |
6287 | &new_inst->value, NULL, NULL)) | |
6288 | { | |
6289 | put_aarch64_insn (buf, new_inst->value); | |
6290 | break; | |
6291 | } | |
6292 | else if (new_inst->opcode->iclass == ldst_pos | |
6293 | && try_to_encode_as_unscaled_ldst (new_inst)) | |
6294 | { | |
6295 | put_aarch64_insn (buf, new_inst->value); | |
6296 | break; | |
6297 | } | |
6298 | ||
6299 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6300 | _("immediate offset out of range")); | |
6301 | break; | |
6302 | ||
6303 | default: | |
6304 | gas_assert (0); | |
6305 | as_fatal (_("unhandled operand code %d"), opnd); | |
6306 | } | |
6307 | } | |
6308 | ||
6309 | /* Apply a fixup (fixP) to segment data, once it has been determined | |
6310 | by our caller that we have all the info we need to fix it up. | |
6311 | ||
6312 | Parameter valP is the pointer to the value of the bits. */ | |
6313 | ||
6314 | void | |
6315 | md_apply_fix (fixS * fixP, valueT * valP, segT seg) | |
6316 | { | |
6317 | offsetT value = *valP; | |
6318 | uint32_t insn; | |
6319 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
6320 | int scale; | |
6321 | unsigned flags = fixP->fx_addnumber; | |
6322 | ||
6323 | DEBUG_TRACE ("\n\n"); | |
6324 | DEBUG_TRACE ("~~~~~~~~~~~~~~~~~~~~~~~~~"); | |
6325 | DEBUG_TRACE ("Enter md_apply_fix"); | |
6326 | ||
6327 | gas_assert (fixP->fx_r_type <= BFD_RELOC_UNUSED); | |
6328 | ||
6329 | /* Note whether this will delete the relocation. */ | |
6330 | ||
6331 | if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) | |
6332 | fixP->fx_done = 1; | |
6333 | ||
6334 | /* Process the relocations. */ | |
6335 | switch (fixP->fx_r_type) | |
6336 | { | |
6337 | case BFD_RELOC_NONE: | |
6338 | /* This will need to go in the object file. */ | |
6339 | fixP->fx_done = 0; | |
6340 | break; | |
6341 | ||
6342 | case BFD_RELOC_8: | |
6343 | case BFD_RELOC_8_PCREL: | |
6344 | if (fixP->fx_done || !seg->use_rela_p) | |
6345 | md_number_to_chars (buf, value, 1); | |
6346 | break; | |
6347 | ||
6348 | case BFD_RELOC_16: | |
6349 | case BFD_RELOC_16_PCREL: | |
6350 | if (fixP->fx_done || !seg->use_rela_p) | |
6351 | md_number_to_chars (buf, value, 2); | |
6352 | break; | |
6353 | ||
6354 | case BFD_RELOC_32: | |
6355 | case BFD_RELOC_32_PCREL: | |
6356 | if (fixP->fx_done || !seg->use_rela_p) | |
6357 | md_number_to_chars (buf, value, 4); | |
6358 | break; | |
6359 | ||
6360 | case BFD_RELOC_64: | |
6361 | case BFD_RELOC_64_PCREL: | |
6362 | if (fixP->fx_done || !seg->use_rela_p) | |
6363 | md_number_to_chars (buf, value, 8); | |
6364 | break; | |
6365 | ||
6366 | case BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP: | |
6367 | /* We claim that these fixups have been processed here, even if | |
6368 | in fact we generate an error because we do not have a reloc | |
6369 | for them, so tc_gen_reloc() will reject them. */ | |
6370 | fixP->fx_done = 1; | |
6371 | if (fixP->fx_addsy && !S_IS_DEFINED (fixP->fx_addsy)) | |
6372 | { | |
6373 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6374 | _("undefined symbol %s used as an immediate value"), | |
6375 | S_GET_NAME (fixP->fx_addsy)); | |
6376 | goto apply_fix_return; | |
6377 | } | |
6378 | fix_insn (fixP, flags, value); | |
6379 | break; | |
6380 | ||
6381 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: | |
a06ea964 NC |
6382 | if (fixP->fx_done || !seg->use_rela_p) |
6383 | { | |
89d2a2a3 MS |
6384 | if (value & 3) |
6385 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6386 | _("pc-relative load offset not word aligned")); | |
6387 | if (signed_overflow (value, 21)) | |
6388 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6389 | _("pc-relative load offset out of range")); | |
a06ea964 NC |
6390 | insn = get_aarch64_insn (buf); |
6391 | insn |= encode_ld_lit_ofs_19 (value >> 2); | |
6392 | put_aarch64_insn (buf, insn); | |
6393 | } | |
6394 | break; | |
6395 | ||
6396 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: | |
a06ea964 NC |
6397 | if (fixP->fx_done || !seg->use_rela_p) |
6398 | { | |
89d2a2a3 MS |
6399 | if (signed_overflow (value, 21)) |
6400 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6401 | _("pc-relative address offset out of range")); | |
a06ea964 NC |
6402 | insn = get_aarch64_insn (buf); |
6403 | insn |= encode_adr_imm (value); | |
6404 | put_aarch64_insn (buf, insn); | |
6405 | } | |
6406 | break; | |
6407 | ||
6408 | case BFD_RELOC_AARCH64_BRANCH19: | |
a06ea964 NC |
6409 | if (fixP->fx_done || !seg->use_rela_p) |
6410 | { | |
89d2a2a3 MS |
6411 | if (value & 3) |
6412 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6413 | _("conditional branch target not word aligned")); | |
6414 | if (signed_overflow (value, 21)) | |
6415 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6416 | _("conditional branch out of range")); | |
a06ea964 NC |
6417 | insn = get_aarch64_insn (buf); |
6418 | insn |= encode_cond_branch_ofs_19 (value >> 2); | |
6419 | put_aarch64_insn (buf, insn); | |
6420 | } | |
6421 | break; | |
6422 | ||
6423 | case BFD_RELOC_AARCH64_TSTBR14: | |
a06ea964 NC |
6424 | if (fixP->fx_done || !seg->use_rela_p) |
6425 | { | |
89d2a2a3 MS |
6426 | if (value & 3) |
6427 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6428 | _("conditional branch target not word aligned")); | |
6429 | if (signed_overflow (value, 16)) | |
6430 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6431 | _("conditional branch out of range")); | |
a06ea964 NC |
6432 | insn = get_aarch64_insn (buf); |
6433 | insn |= encode_tst_branch_ofs_14 (value >> 2); | |
6434 | put_aarch64_insn (buf, insn); | |
6435 | } | |
6436 | break; | |
6437 | ||
6438 | case BFD_RELOC_AARCH64_JUMP26: | |
6439 | case BFD_RELOC_AARCH64_CALL26: | |
a06ea964 NC |
6440 | if (fixP->fx_done || !seg->use_rela_p) |
6441 | { | |
89d2a2a3 MS |
6442 | if (value & 3) |
6443 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6444 | _("branch target not word aligned")); | |
6445 | if (signed_overflow (value, 28)) | |
6446 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6447 | _("branch out of range")); | |
a06ea964 NC |
6448 | insn = get_aarch64_insn (buf); |
6449 | insn |= encode_branch_ofs_26 (value >> 2); | |
6450 | put_aarch64_insn (buf, insn); | |
6451 | } | |
6452 | break; | |
6453 | ||
6454 | case BFD_RELOC_AARCH64_MOVW_G0: | |
6455 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
6456 | case BFD_RELOC_AARCH64_MOVW_G0_NC: | |
6457 | scale = 0; | |
6458 | goto movw_common; | |
6459 | case BFD_RELOC_AARCH64_MOVW_G1: | |
6460 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
6461 | case BFD_RELOC_AARCH64_MOVW_G1_NC: | |
6462 | scale = 16; | |
6463 | goto movw_common; | |
6464 | case BFD_RELOC_AARCH64_MOVW_G2: | |
6465 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
6466 | case BFD_RELOC_AARCH64_MOVW_G2_NC: | |
6467 | scale = 32; | |
6468 | goto movw_common; | |
6469 | case BFD_RELOC_AARCH64_MOVW_G3: | |
6470 | scale = 48; | |
6471 | movw_common: | |
6472 | if (fixP->fx_done || !seg->use_rela_p) | |
6473 | { | |
6474 | insn = get_aarch64_insn (buf); | |
6475 | ||
6476 | if (!fixP->fx_done) | |
6477 | { | |
6478 | /* REL signed addend must fit in 16 bits */ | |
6479 | if (signed_overflow (value, 16)) | |
6480 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6481 | _("offset out of range")); | |
6482 | } | |
6483 | else | |
6484 | { | |
6485 | /* Check for overflow and scale. */ | |
6486 | switch (fixP->fx_r_type) | |
6487 | { | |
6488 | case BFD_RELOC_AARCH64_MOVW_G0: | |
6489 | case BFD_RELOC_AARCH64_MOVW_G1: | |
6490 | case BFD_RELOC_AARCH64_MOVW_G2: | |
6491 | case BFD_RELOC_AARCH64_MOVW_G3: | |
6492 | if (unsigned_overflow (value, scale + 16)) | |
6493 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6494 | _("unsigned value out of range")); | |
6495 | break; | |
6496 | case BFD_RELOC_AARCH64_MOVW_G0_S: | |
6497 | case BFD_RELOC_AARCH64_MOVW_G1_S: | |
6498 | case BFD_RELOC_AARCH64_MOVW_G2_S: | |
6499 | /* NOTE: We can only come here with movz or movn. */ | |
6500 | if (signed_overflow (value, scale + 16)) | |
6501 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6502 | _("signed value out of range")); | |
6503 | if (value < 0) | |
6504 | { | |
6505 | /* Force use of MOVN. */ | |
6506 | value = ~value; | |
6507 | insn = reencode_movzn_to_movn (insn); | |
6508 | } | |
6509 | else | |
6510 | { | |
6511 | /* Force use of MOVZ. */ | |
6512 | insn = reencode_movzn_to_movz (insn); | |
6513 | } | |
6514 | break; | |
6515 | default: | |
6516 | /* Unchecked relocations. */ | |
6517 | break; | |
6518 | } | |
6519 | value >>= scale; | |
6520 | } | |
6521 | ||
6522 | /* Insert value into MOVN/MOVZ/MOVK instruction. */ | |
6523 | insn |= encode_movw_imm (value & 0xffff); | |
6524 | ||
6525 | put_aarch64_insn (buf, insn); | |
6526 | } | |
6527 | break; | |
6528 | ||
a6bb11b2 YZ |
6529 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC: |
6530 | fixP->fx_r_type = (ilp32_p | |
6531 | ? BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC | |
6532 | : BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC); | |
6533 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
6534 | /* Should always be exported to object file, see | |
6535 | aarch64_force_relocation(). */ | |
6536 | gas_assert (!fixP->fx_done); | |
6537 | gas_assert (seg->use_rela_p); | |
6538 | break; | |
6539 | ||
6540 | case BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC: | |
6541 | fixP->fx_r_type = (ilp32_p | |
6542 | ? BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC | |
6543 | : BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC); | |
6544 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
6545 | /* Should always be exported to object file, see | |
6546 | aarch64_force_relocation(). */ | |
6547 | gas_assert (!fixP->fx_done); | |
6548 | gas_assert (seg->use_rela_p); | |
6549 | break; | |
6550 | ||
2c0a3565 MS |
6551 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
6552 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
6553 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
6554 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
a06ea964 | 6555 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
2c0a3565 | 6556 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
a06ea964 | 6557 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
a6bb11b2 | 6558 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
2c0a3565 | 6559 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
a06ea964 | 6560 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
2c0a3565 | 6561 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
a06ea964 | 6562 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
a06ea964 NC |
6563 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
6564 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
2c0a3565 MS |
6565 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
6566 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6567 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
a06ea964 NC |
6568 | S_SET_THREAD_LOCAL (fixP->fx_addsy); |
6569 | /* Should always be exported to object file, see | |
6570 | aarch64_force_relocation(). */ | |
6571 | gas_assert (!fixP->fx_done); | |
6572 | gas_assert (seg->use_rela_p); | |
6573 | break; | |
6574 | ||
a6bb11b2 YZ |
6575 | case BFD_RELOC_AARCH64_LD_GOT_LO12_NC: |
6576 | /* Should always be exported to object file, see | |
6577 | aarch64_force_relocation(). */ | |
6578 | fixP->fx_r_type = (ilp32_p | |
6579 | ? BFD_RELOC_AARCH64_LD32_GOT_LO12_NC | |
6580 | : BFD_RELOC_AARCH64_LD64_GOT_LO12_NC); | |
6581 | gas_assert (!fixP->fx_done); | |
6582 | gas_assert (seg->use_rela_p); | |
6583 | break; | |
6584 | ||
a06ea964 NC |
6585 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
6586 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
6587 | case BFD_RELOC_AARCH64_ADD_LO12: | |
6588 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
6589 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
6590 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
6591 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
6592 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
f41aef5f | 6593 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
a06ea964 NC |
6594 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
6595 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
a6bb11b2 | 6596 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
a06ea964 NC |
6597 | /* Should always be exported to object file, see |
6598 | aarch64_force_relocation(). */ | |
6599 | gas_assert (!fixP->fx_done); | |
6600 | gas_assert (seg->use_rela_p); | |
6601 | break; | |
6602 | ||
6603 | case BFD_RELOC_AARCH64_TLSDESC_ADD: | |
6604 | case BFD_RELOC_AARCH64_TLSDESC_LDR: | |
6605 | case BFD_RELOC_AARCH64_TLSDESC_CALL: | |
6606 | break; | |
6607 | ||
6608 | default: | |
6609 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6610 | _("unexpected %s fixup"), | |
6611 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
6612 | break; | |
6613 | } | |
6614 | ||
6615 | apply_fix_return: | |
6616 | /* Free the allocated the struct aarch64_inst. | |
6617 | N.B. currently there are very limited number of fix-up types actually use | |
6618 | this field, so the impact on the performance should be minimal . */ | |
6619 | if (fixP->tc_fix_data.inst != NULL) | |
6620 | free (fixP->tc_fix_data.inst); | |
6621 | ||
6622 | return; | |
6623 | } | |
6624 | ||
6625 | /* Translate internal representation of relocation info to BFD target | |
6626 | format. */ | |
6627 | ||
6628 | arelent * | |
6629 | tc_gen_reloc (asection * section, fixS * fixp) | |
6630 | { | |
6631 | arelent *reloc; | |
6632 | bfd_reloc_code_real_type code; | |
6633 | ||
6634 | reloc = xmalloc (sizeof (arelent)); | |
6635 | ||
6636 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
6637 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
6638 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
6639 | ||
6640 | if (fixp->fx_pcrel) | |
6641 | { | |
6642 | if (section->use_rela_p) | |
6643 | fixp->fx_offset -= md_pcrel_from_section (fixp, section); | |
6644 | else | |
6645 | fixp->fx_offset = reloc->address; | |
6646 | } | |
6647 | reloc->addend = fixp->fx_offset; | |
6648 | ||
6649 | code = fixp->fx_r_type; | |
6650 | switch (code) | |
6651 | { | |
6652 | case BFD_RELOC_16: | |
6653 | if (fixp->fx_pcrel) | |
6654 | code = BFD_RELOC_16_PCREL; | |
6655 | break; | |
6656 | ||
6657 | case BFD_RELOC_32: | |
6658 | if (fixp->fx_pcrel) | |
6659 | code = BFD_RELOC_32_PCREL; | |
6660 | break; | |
6661 | ||
6662 | case BFD_RELOC_64: | |
6663 | if (fixp->fx_pcrel) | |
6664 | code = BFD_RELOC_64_PCREL; | |
6665 | break; | |
6666 | ||
6667 | default: | |
6668 | break; | |
6669 | } | |
6670 | ||
6671 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
6672 | if (reloc->howto == NULL) | |
6673 | { | |
6674 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
6675 | _ | |
6676 | ("cannot represent %s relocation in this object file format"), | |
6677 | bfd_get_reloc_code_name (code)); | |
6678 | return NULL; | |
6679 | } | |
6680 | ||
6681 | return reloc; | |
6682 | } | |
6683 | ||
6684 | /* This fix_new is called by cons via TC_CONS_FIX_NEW. */ | |
6685 | ||
6686 | void | |
6687 | cons_fix_new_aarch64 (fragS * frag, int where, int size, expressionS * exp) | |
6688 | { | |
6689 | bfd_reloc_code_real_type type; | |
6690 | int pcrel = 0; | |
6691 | ||
6692 | /* Pick a reloc. | |
6693 | FIXME: @@ Should look at CPU word size. */ | |
6694 | switch (size) | |
6695 | { | |
6696 | case 1: | |
6697 | type = BFD_RELOC_8; | |
6698 | break; | |
6699 | case 2: | |
6700 | type = BFD_RELOC_16; | |
6701 | break; | |
6702 | case 4: | |
6703 | type = BFD_RELOC_32; | |
6704 | break; | |
6705 | case 8: | |
6706 | type = BFD_RELOC_64; | |
6707 | break; | |
6708 | default: | |
6709 | as_bad (_("cannot do %u-byte relocation"), size); | |
6710 | type = BFD_RELOC_UNUSED; | |
6711 | break; | |
6712 | } | |
6713 | ||
6714 | fix_new_exp (frag, where, (int) size, exp, pcrel, type); | |
6715 | } | |
6716 | ||
6717 | int | |
6718 | aarch64_force_relocation (struct fix *fixp) | |
6719 | { | |
6720 | switch (fixp->fx_r_type) | |
6721 | { | |
6722 | case BFD_RELOC_AARCH64_GAS_INTERNAL_FIXUP: | |
6723 | /* Perform these "immediate" internal relocations | |
6724 | even if the symbol is extern or weak. */ | |
6725 | return 0; | |
6726 | ||
a6bb11b2 YZ |
6727 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_LO12_NC: |
6728 | case BFD_RELOC_AARCH64_TLSDESC_LD_LO12_NC: | |
6729 | case BFD_RELOC_AARCH64_LD_GOT_LO12_NC: | |
6730 | /* Pseudo relocs that need to be fixed up according to | |
6731 | ilp32_p. */ | |
6732 | return 0; | |
6733 | ||
2c0a3565 MS |
6734 | case BFD_RELOC_AARCH64_ADD_LO12: |
6735 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: | |
6736 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: | |
6737 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: | |
6738 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: | |
6739 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: | |
6740 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: | |
6741 | case BFD_RELOC_AARCH64_LDST128_LO12: | |
6742 | case BFD_RELOC_AARCH64_LDST16_LO12: | |
6743 | case BFD_RELOC_AARCH64_LDST32_LO12: | |
6744 | case BFD_RELOC_AARCH64_LDST64_LO12: | |
6745 | case BFD_RELOC_AARCH64_LDST8_LO12: | |
6746 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: | |
6747 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: | |
6748 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: | |
6749 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: | |
a06ea964 | 6750 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
2c0a3565 | 6751 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
a06ea964 | 6752 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
a6bb11b2 | 6753 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
2c0a3565 | 6754 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
a06ea964 | 6755 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
2c0a3565 | 6756 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
a06ea964 | 6757 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
a06ea964 NC |
6758 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
6759 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
2c0a3565 MS |
6760 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
6761 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6762 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: | |
a06ea964 NC |
6763 | /* Always leave these relocations for the linker. */ |
6764 | return 1; | |
6765 | ||
6766 | default: | |
6767 | break; | |
6768 | } | |
6769 | ||
6770 | return generic_force_reloc (fixp); | |
6771 | } | |
6772 | ||
6773 | #ifdef OBJ_ELF | |
6774 | ||
6775 | const char * | |
6776 | elf64_aarch64_target_format (void) | |
6777 | { | |
6778 | if (target_big_endian) | |
cec5225b | 6779 | return ilp32_p ? "elf32-bigaarch64" : "elf64-bigaarch64"; |
a06ea964 | 6780 | else |
cec5225b | 6781 | return ilp32_p ? "elf32-littleaarch64" : "elf64-littleaarch64"; |
a06ea964 NC |
6782 | } |
6783 | ||
6784 | void | |
6785 | aarch64elf_frob_symbol (symbolS * symp, int *puntp) | |
6786 | { | |
6787 | elf_frob_symbol (symp, puntp); | |
6788 | } | |
6789 | #endif | |
6790 | ||
6791 | /* MD interface: Finalization. */ | |
6792 | ||
6793 | /* A good place to do this, although this was probably not intended | |
6794 | for this kind of use. We need to dump the literal pool before | |
6795 | references are made to a null symbol pointer. */ | |
6796 | ||
6797 | void | |
6798 | aarch64_cleanup (void) | |
6799 | { | |
6800 | literal_pool *pool; | |
6801 | ||
6802 | for (pool = list_of_pools; pool; pool = pool->next) | |
6803 | { | |
6804 | /* Put it at the end of the relevant section. */ | |
6805 | subseg_set (pool->section, pool->sub_section); | |
6806 | s_ltorg (0); | |
6807 | } | |
6808 | } | |
6809 | ||
6810 | #ifdef OBJ_ELF | |
6811 | /* Remove any excess mapping symbols generated for alignment frags in | |
6812 | SEC. We may have created a mapping symbol before a zero byte | |
6813 | alignment; remove it if there's a mapping symbol after the | |
6814 | alignment. */ | |
6815 | static void | |
6816 | check_mapping_symbols (bfd * abfd ATTRIBUTE_UNUSED, asection * sec, | |
6817 | void *dummy ATTRIBUTE_UNUSED) | |
6818 | { | |
6819 | segment_info_type *seginfo = seg_info (sec); | |
6820 | fragS *fragp; | |
6821 | ||
6822 | if (seginfo == NULL || seginfo->frchainP == NULL) | |
6823 | return; | |
6824 | ||
6825 | for (fragp = seginfo->frchainP->frch_root; | |
6826 | fragp != NULL; fragp = fragp->fr_next) | |
6827 | { | |
6828 | symbolS *sym = fragp->tc_frag_data.last_map; | |
6829 | fragS *next = fragp->fr_next; | |
6830 | ||
6831 | /* Variable-sized frags have been converted to fixed size by | |
6832 | this point. But if this was variable-sized to start with, | |
6833 | there will be a fixed-size frag after it. So don't handle | |
6834 | next == NULL. */ | |
6835 | if (sym == NULL || next == NULL) | |
6836 | continue; | |
6837 | ||
6838 | if (S_GET_VALUE (sym) < next->fr_address) | |
6839 | /* Not at the end of this frag. */ | |
6840 | continue; | |
6841 | know (S_GET_VALUE (sym) == next->fr_address); | |
6842 | ||
6843 | do | |
6844 | { | |
6845 | if (next->tc_frag_data.first_map != NULL) | |
6846 | { | |
6847 | /* Next frag starts with a mapping symbol. Discard this | |
6848 | one. */ | |
6849 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
6850 | break; | |
6851 | } | |
6852 | ||
6853 | if (next->fr_next == NULL) | |
6854 | { | |
6855 | /* This mapping symbol is at the end of the section. Discard | |
6856 | it. */ | |
6857 | know (next->fr_fix == 0 && next->fr_var == 0); | |
6858 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
6859 | break; | |
6860 | } | |
6861 | ||
6862 | /* As long as we have empty frags without any mapping symbols, | |
6863 | keep looking. */ | |
6864 | /* If the next frag is non-empty and does not start with a | |
6865 | mapping symbol, then this mapping symbol is required. */ | |
6866 | if (next->fr_address != next->fr_next->fr_address) | |
6867 | break; | |
6868 | ||
6869 | next = next->fr_next; | |
6870 | } | |
6871 | while (next != NULL); | |
6872 | } | |
6873 | } | |
6874 | #endif | |
6875 | ||
6876 | /* Adjust the symbol table. */ | |
6877 | ||
6878 | void | |
6879 | aarch64_adjust_symtab (void) | |
6880 | { | |
6881 | #ifdef OBJ_ELF | |
6882 | /* Remove any overlapping mapping symbols generated by alignment frags. */ | |
6883 | bfd_map_over_sections (stdoutput, check_mapping_symbols, (char *) 0); | |
6884 | /* Now do generic ELF adjustments. */ | |
6885 | elf_adjust_symtab (); | |
6886 | #endif | |
6887 | } | |
6888 | ||
6889 | static void | |
6890 | checked_hash_insert (struct hash_control *table, const char *key, void *value) | |
6891 | { | |
6892 | const char *hash_err; | |
6893 | ||
6894 | hash_err = hash_insert (table, key, value); | |
6895 | if (hash_err) | |
6896 | printf ("Internal Error: Can't hash %s\n", key); | |
6897 | } | |
6898 | ||
6899 | static void | |
6900 | fill_instruction_hash_table (void) | |
6901 | { | |
6902 | aarch64_opcode *opcode = aarch64_opcode_table; | |
6903 | ||
6904 | while (opcode->name != NULL) | |
6905 | { | |
6906 | templates *templ, *new_templ; | |
6907 | templ = hash_find (aarch64_ops_hsh, opcode->name); | |
6908 | ||
6909 | new_templ = (templates *) xmalloc (sizeof (templates)); | |
6910 | new_templ->opcode = opcode; | |
6911 | new_templ->next = NULL; | |
6912 | ||
6913 | if (!templ) | |
6914 | checked_hash_insert (aarch64_ops_hsh, opcode->name, (void *) new_templ); | |
6915 | else | |
6916 | { | |
6917 | new_templ->next = templ->next; | |
6918 | templ->next = new_templ; | |
6919 | } | |
6920 | ++opcode; | |
6921 | } | |
6922 | } | |
6923 | ||
6924 | static inline void | |
6925 | convert_to_upper (char *dst, const char *src, size_t num) | |
6926 | { | |
6927 | unsigned int i; | |
6928 | for (i = 0; i < num && *src != '\0'; ++i, ++dst, ++src) | |
6929 | *dst = TOUPPER (*src); | |
6930 | *dst = '\0'; | |
6931 | } | |
6932 | ||
6933 | /* Assume STR point to a lower-case string, allocate, convert and return | |
6934 | the corresponding upper-case string. */ | |
6935 | static inline const char* | |
6936 | get_upper_str (const char *str) | |
6937 | { | |
6938 | char *ret; | |
6939 | size_t len = strlen (str); | |
6940 | if ((ret = xmalloc (len + 1)) == NULL) | |
6941 | abort (); | |
6942 | convert_to_upper (ret, str, len); | |
6943 | return ret; | |
6944 | } | |
6945 | ||
6946 | /* MD interface: Initialization. */ | |
6947 | ||
6948 | void | |
6949 | md_begin (void) | |
6950 | { | |
6951 | unsigned mach; | |
6952 | unsigned int i; | |
6953 | ||
6954 | if ((aarch64_ops_hsh = hash_new ()) == NULL | |
6955 | || (aarch64_cond_hsh = hash_new ()) == NULL | |
6956 | || (aarch64_shift_hsh = hash_new ()) == NULL | |
6957 | || (aarch64_sys_regs_hsh = hash_new ()) == NULL | |
6958 | || (aarch64_pstatefield_hsh = hash_new ()) == NULL | |
6959 | || (aarch64_sys_regs_ic_hsh = hash_new ()) == NULL | |
6960 | || (aarch64_sys_regs_dc_hsh = hash_new ()) == NULL | |
6961 | || (aarch64_sys_regs_at_hsh = hash_new ()) == NULL | |
6962 | || (aarch64_sys_regs_tlbi_hsh = hash_new ()) == NULL | |
6963 | || (aarch64_reg_hsh = hash_new ()) == NULL | |
6964 | || (aarch64_barrier_opt_hsh = hash_new ()) == NULL | |
6965 | || (aarch64_nzcv_hsh = hash_new ()) == NULL | |
6966 | || (aarch64_pldop_hsh = hash_new ()) == NULL) | |
6967 | as_fatal (_("virtual memory exhausted")); | |
6968 | ||
6969 | fill_instruction_hash_table (); | |
6970 | ||
6971 | for (i = 0; aarch64_sys_regs[i].name != NULL; ++i) | |
6972 | checked_hash_insert (aarch64_sys_regs_hsh, aarch64_sys_regs[i].name, | |
6973 | (void *) (aarch64_sys_regs + i)); | |
6974 | ||
6975 | for (i = 0; aarch64_pstatefields[i].name != NULL; ++i) | |
6976 | checked_hash_insert (aarch64_pstatefield_hsh, | |
6977 | aarch64_pstatefields[i].name, | |
6978 | (void *) (aarch64_pstatefields + i)); | |
6979 | ||
6980 | for (i = 0; aarch64_sys_regs_ic[i].template != NULL; i++) | |
6981 | checked_hash_insert (aarch64_sys_regs_ic_hsh, | |
6982 | aarch64_sys_regs_ic[i].template, | |
6983 | (void *) (aarch64_sys_regs_ic + i)); | |
6984 | ||
6985 | for (i = 0; aarch64_sys_regs_dc[i].template != NULL; i++) | |
6986 | checked_hash_insert (aarch64_sys_regs_dc_hsh, | |
6987 | aarch64_sys_regs_dc[i].template, | |
6988 | (void *) (aarch64_sys_regs_dc + i)); | |
6989 | ||
6990 | for (i = 0; aarch64_sys_regs_at[i].template != NULL; i++) | |
6991 | checked_hash_insert (aarch64_sys_regs_at_hsh, | |
6992 | aarch64_sys_regs_at[i].template, | |
6993 | (void *) (aarch64_sys_regs_at + i)); | |
6994 | ||
6995 | for (i = 0; aarch64_sys_regs_tlbi[i].template != NULL; i++) | |
6996 | checked_hash_insert (aarch64_sys_regs_tlbi_hsh, | |
6997 | aarch64_sys_regs_tlbi[i].template, | |
6998 | (void *) (aarch64_sys_regs_tlbi + i)); | |
6999 | ||
7000 | for (i = 0; i < ARRAY_SIZE (reg_names); i++) | |
7001 | checked_hash_insert (aarch64_reg_hsh, reg_names[i].name, | |
7002 | (void *) (reg_names + i)); | |
7003 | ||
7004 | for (i = 0; i < ARRAY_SIZE (nzcv_names); i++) | |
7005 | checked_hash_insert (aarch64_nzcv_hsh, nzcv_names[i].template, | |
7006 | (void *) (nzcv_names + i)); | |
7007 | ||
7008 | for (i = 0; aarch64_operand_modifiers[i].name != NULL; i++) | |
7009 | { | |
7010 | const char *name = aarch64_operand_modifiers[i].name; | |
7011 | checked_hash_insert (aarch64_shift_hsh, name, | |
7012 | (void *) (aarch64_operand_modifiers + i)); | |
7013 | /* Also hash the name in the upper case. */ | |
7014 | checked_hash_insert (aarch64_shift_hsh, get_upper_str (name), | |
7015 | (void *) (aarch64_operand_modifiers + i)); | |
7016 | } | |
7017 | ||
7018 | for (i = 0; i < ARRAY_SIZE (aarch64_conds); i++) | |
7019 | { | |
7020 | unsigned int j; | |
7021 | /* A condition code may have alias(es), e.g. "cc", "lo" and "ul" are | |
7022 | the same condition code. */ | |
7023 | for (j = 0; j < ARRAY_SIZE (aarch64_conds[i].names); ++j) | |
7024 | { | |
7025 | const char *name = aarch64_conds[i].names[j]; | |
7026 | if (name == NULL) | |
7027 | break; | |
7028 | checked_hash_insert (aarch64_cond_hsh, name, | |
7029 | (void *) (aarch64_conds + i)); | |
7030 | /* Also hash the name in the upper case. */ | |
7031 | checked_hash_insert (aarch64_cond_hsh, get_upper_str (name), | |
7032 | (void *) (aarch64_conds + i)); | |
7033 | } | |
7034 | } | |
7035 | ||
7036 | for (i = 0; i < ARRAY_SIZE (aarch64_barrier_options); i++) | |
7037 | { | |
7038 | const char *name = aarch64_barrier_options[i].name; | |
7039 | /* Skip xx00 - the unallocated values of option. */ | |
7040 | if ((i & 0x3) == 0) | |
7041 | continue; | |
7042 | checked_hash_insert (aarch64_barrier_opt_hsh, name, | |
7043 | (void *) (aarch64_barrier_options + i)); | |
7044 | /* Also hash the name in the upper case. */ | |
7045 | checked_hash_insert (aarch64_barrier_opt_hsh, get_upper_str (name), | |
7046 | (void *) (aarch64_barrier_options + i)); | |
7047 | } | |
7048 | ||
7049 | for (i = 0; i < ARRAY_SIZE (aarch64_prfops); i++) | |
7050 | { | |
7051 | const char* name = aarch64_prfops[i].name; | |
a1ccaec9 YZ |
7052 | /* Skip the unallocated hint encodings. */ |
7053 | if (name == NULL) | |
a06ea964 NC |
7054 | continue; |
7055 | checked_hash_insert (aarch64_pldop_hsh, name, | |
7056 | (void *) (aarch64_prfops + i)); | |
7057 | /* Also hash the name in the upper case. */ | |
7058 | checked_hash_insert (aarch64_pldop_hsh, get_upper_str (name), | |
7059 | (void *) (aarch64_prfops + i)); | |
7060 | } | |
7061 | ||
7062 | /* Set the cpu variant based on the command-line options. */ | |
7063 | if (!mcpu_cpu_opt) | |
7064 | mcpu_cpu_opt = march_cpu_opt; | |
7065 | ||
7066 | if (!mcpu_cpu_opt) | |
7067 | mcpu_cpu_opt = &cpu_default; | |
7068 | ||
7069 | cpu_variant = *mcpu_cpu_opt; | |
7070 | ||
7071 | /* Record the CPU type. */ | |
cec5225b | 7072 | mach = ilp32_p ? bfd_mach_aarch64_ilp32 : bfd_mach_aarch64; |
a06ea964 NC |
7073 | |
7074 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach); | |
7075 | } | |
7076 | ||
7077 | /* Command line processing. */ | |
7078 | ||
7079 | const char *md_shortopts = "m:"; | |
7080 | ||
7081 | #ifdef AARCH64_BI_ENDIAN | |
7082 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
7083 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
7084 | #else | |
7085 | #if TARGET_BYTES_BIG_ENDIAN | |
7086 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
7087 | #else | |
7088 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
7089 | #endif | |
7090 | #endif | |
7091 | ||
7092 | struct option md_longopts[] = { | |
7093 | #ifdef OPTION_EB | |
7094 | {"EB", no_argument, NULL, OPTION_EB}, | |
7095 | #endif | |
7096 | #ifdef OPTION_EL | |
7097 | {"EL", no_argument, NULL, OPTION_EL}, | |
7098 | #endif | |
7099 | {NULL, no_argument, NULL, 0} | |
7100 | }; | |
7101 | ||
7102 | size_t md_longopts_size = sizeof (md_longopts); | |
7103 | ||
7104 | struct aarch64_option_table | |
7105 | { | |
7106 | char *option; /* Option name to match. */ | |
7107 | char *help; /* Help information. */ | |
7108 | int *var; /* Variable to change. */ | |
7109 | int value; /* What to change it to. */ | |
7110 | char *deprecated; /* If non-null, print this message. */ | |
7111 | }; | |
7112 | ||
7113 | static struct aarch64_option_table aarch64_opts[] = { | |
7114 | {"mbig-endian", N_("assemble for big-endian"), &target_big_endian, 1, NULL}, | |
7115 | {"mlittle-endian", N_("assemble for little-endian"), &target_big_endian, 0, | |
7116 | NULL}, | |
7117 | #ifdef DEBUG_AARCH64 | |
7118 | {"mdebug-dump", N_("temporary switch for dumping"), &debug_dump, 1, NULL}, | |
7119 | #endif /* DEBUG_AARCH64 */ | |
7120 | {"mverbose-error", N_("output verbose error messages"), &verbose_error_p, 1, | |
7121 | NULL}, | |
7122 | {NULL, NULL, NULL, 0, NULL} | |
7123 | }; | |
7124 | ||
7125 | struct aarch64_cpu_option_table | |
7126 | { | |
7127 | char *name; | |
7128 | const aarch64_feature_set value; | |
7129 | /* The canonical name of the CPU, or NULL to use NAME converted to upper | |
7130 | case. */ | |
7131 | const char *canonical_name; | |
7132 | }; | |
7133 | ||
7134 | /* This list should, at a minimum, contain all the cpu names | |
7135 | recognized by GCC. */ | |
7136 | static const struct aarch64_cpu_option_table aarch64_cpus[] = { | |
7137 | {"all", AARCH64_ANY, NULL}, | |
95830fd1 YZ |
7138 | {"cortex-a53", AARCH64_ARCH_V8, "Cortex-A53"}, |
7139 | {"cortex-a57", AARCH64_ARCH_V8, "Cortex-A57"}, | |
a06ea964 NC |
7140 | {"generic", AARCH64_ARCH_V8, NULL}, |
7141 | ||
7142 | /* These two are example CPUs supported in GCC, once we have real | |
7143 | CPUs they will be removed. */ | |
7144 | {"example-1", AARCH64_ARCH_V8, NULL}, | |
7145 | {"example-2", AARCH64_ARCH_V8, NULL}, | |
7146 | ||
7147 | {NULL, AARCH64_ARCH_NONE, NULL} | |
7148 | }; | |
7149 | ||
7150 | struct aarch64_arch_option_table | |
7151 | { | |
7152 | char *name; | |
7153 | const aarch64_feature_set value; | |
7154 | }; | |
7155 | ||
7156 | /* This list should, at a minimum, contain all the architecture names | |
7157 | recognized by GCC. */ | |
7158 | static const struct aarch64_arch_option_table aarch64_archs[] = { | |
7159 | {"all", AARCH64_ANY}, | |
5a1ad39d | 7160 | {"armv8-a", AARCH64_ARCH_V8}, |
a06ea964 NC |
7161 | {NULL, AARCH64_ARCH_NONE} |
7162 | }; | |
7163 | ||
7164 | /* ISA extensions. */ | |
7165 | struct aarch64_option_cpu_value_table | |
7166 | { | |
7167 | char *name; | |
7168 | const aarch64_feature_set value; | |
7169 | }; | |
7170 | ||
7171 | static const struct aarch64_option_cpu_value_table aarch64_features[] = { | |
e60bb1dd | 7172 | {"crc", AARCH64_FEATURE (AARCH64_FEATURE_CRC, 0)}, |
a06ea964 NC |
7173 | {"crypto", AARCH64_FEATURE (AARCH64_FEATURE_CRYPTO, 0)}, |
7174 | {"fp", AARCH64_FEATURE (AARCH64_FEATURE_FP, 0)}, | |
7175 | {"simd", AARCH64_FEATURE (AARCH64_FEATURE_SIMD, 0)}, | |
7176 | {NULL, AARCH64_ARCH_NONE} | |
7177 | }; | |
7178 | ||
7179 | struct aarch64_long_option_table | |
7180 | { | |
7181 | char *option; /* Substring to match. */ | |
7182 | char *help; /* Help information. */ | |
7183 | int (*func) (char *subopt); /* Function to decode sub-option. */ | |
7184 | char *deprecated; /* If non-null, print this message. */ | |
7185 | }; | |
7186 | ||
7187 | static int | |
7188 | aarch64_parse_features (char *str, const aarch64_feature_set **opt_p) | |
7189 | { | |
7190 | /* We insist on extensions being added before being removed. We achieve | |
7191 | this by using the ADDING_VALUE variable to indicate whether we are | |
7192 | adding an extension (1) or removing it (0) and only allowing it to | |
7193 | change in the order -1 -> 1 -> 0. */ | |
7194 | int adding_value = -1; | |
7195 | aarch64_feature_set *ext_set = xmalloc (sizeof (aarch64_feature_set)); | |
7196 | ||
7197 | /* Copy the feature set, so that we can modify it. */ | |
7198 | *ext_set = **opt_p; | |
7199 | *opt_p = ext_set; | |
7200 | ||
7201 | while (str != NULL && *str != 0) | |
7202 | { | |
7203 | const struct aarch64_option_cpu_value_table *opt; | |
7204 | char *ext; | |
7205 | int optlen; | |
7206 | ||
7207 | if (*str != '+') | |
7208 | { | |
7209 | as_bad (_("invalid architectural extension")); | |
7210 | return 0; | |
7211 | } | |
7212 | ||
7213 | str++; | |
7214 | ext = strchr (str, '+'); | |
7215 | ||
7216 | if (ext != NULL) | |
7217 | optlen = ext - str; | |
7218 | else | |
7219 | optlen = strlen (str); | |
7220 | ||
7221 | if (optlen >= 2 && strncmp (str, "no", 2) == 0) | |
7222 | { | |
7223 | if (adding_value != 0) | |
7224 | adding_value = 0; | |
7225 | optlen -= 2; | |
7226 | str += 2; | |
7227 | } | |
7228 | else if (optlen > 0) | |
7229 | { | |
7230 | if (adding_value == -1) | |
7231 | adding_value = 1; | |
7232 | else if (adding_value != 1) | |
7233 | { | |
7234 | as_bad (_("must specify extensions to add before specifying " | |
7235 | "those to remove")); | |
7236 | return FALSE; | |
7237 | } | |
7238 | } | |
7239 | ||
7240 | if (optlen == 0) | |
7241 | { | |
7242 | as_bad (_("missing architectural extension")); | |
7243 | return 0; | |
7244 | } | |
7245 | ||
7246 | gas_assert (adding_value != -1); | |
7247 | ||
7248 | for (opt = aarch64_features; opt->name != NULL; opt++) | |
7249 | if (strncmp (opt->name, str, optlen) == 0) | |
7250 | { | |
7251 | /* Add or remove the extension. */ | |
7252 | if (adding_value) | |
7253 | AARCH64_MERGE_FEATURE_SETS (*ext_set, *ext_set, opt->value); | |
7254 | else | |
7255 | AARCH64_CLEAR_FEATURE (*ext_set, *ext_set, opt->value); | |
7256 | break; | |
7257 | } | |
7258 | ||
7259 | if (opt->name == NULL) | |
7260 | { | |
7261 | as_bad (_("unknown architectural extension `%s'"), str); | |
7262 | return 0; | |
7263 | } | |
7264 | ||
7265 | str = ext; | |
7266 | }; | |
7267 | ||
7268 | return 1; | |
7269 | } | |
7270 | ||
7271 | static int | |
7272 | aarch64_parse_cpu (char *str) | |
7273 | { | |
7274 | const struct aarch64_cpu_option_table *opt; | |
7275 | char *ext = strchr (str, '+'); | |
7276 | size_t optlen; | |
7277 | ||
7278 | if (ext != NULL) | |
7279 | optlen = ext - str; | |
7280 | else | |
7281 | optlen = strlen (str); | |
7282 | ||
7283 | if (optlen == 0) | |
7284 | { | |
7285 | as_bad (_("missing cpu name `%s'"), str); | |
7286 | return 0; | |
7287 | } | |
7288 | ||
7289 | for (opt = aarch64_cpus; opt->name != NULL; opt++) | |
7290 | if (strlen (opt->name) == optlen && strncmp (str, opt->name, optlen) == 0) | |
7291 | { | |
7292 | mcpu_cpu_opt = &opt->value; | |
7293 | if (ext != NULL) | |
7294 | return aarch64_parse_features (ext, &mcpu_cpu_opt); | |
7295 | ||
7296 | return 1; | |
7297 | } | |
7298 | ||
7299 | as_bad (_("unknown cpu `%s'"), str); | |
7300 | return 0; | |
7301 | } | |
7302 | ||
7303 | static int | |
7304 | aarch64_parse_arch (char *str) | |
7305 | { | |
7306 | const struct aarch64_arch_option_table *opt; | |
7307 | char *ext = strchr (str, '+'); | |
7308 | size_t optlen; | |
7309 | ||
7310 | if (ext != NULL) | |
7311 | optlen = ext - str; | |
7312 | else | |
7313 | optlen = strlen (str); | |
7314 | ||
7315 | if (optlen == 0) | |
7316 | { | |
7317 | as_bad (_("missing architecture name `%s'"), str); | |
7318 | return 0; | |
7319 | } | |
7320 | ||
7321 | for (opt = aarch64_archs; opt->name != NULL; opt++) | |
7322 | if (strlen (opt->name) == optlen && strncmp (str, opt->name, optlen) == 0) | |
7323 | { | |
7324 | march_cpu_opt = &opt->value; | |
7325 | if (ext != NULL) | |
7326 | return aarch64_parse_features (ext, &march_cpu_opt); | |
7327 | ||
7328 | return 1; | |
7329 | } | |
7330 | ||
7331 | as_bad (_("unknown architecture `%s'\n"), str); | |
7332 | return 0; | |
7333 | } | |
7334 | ||
69091a2c YZ |
7335 | /* ABIs. */ |
7336 | struct aarch64_option_abi_value_table | |
7337 | { | |
7338 | char *name; | |
7339 | enum aarch64_abi_type value; | |
7340 | }; | |
7341 | ||
7342 | static const struct aarch64_option_abi_value_table aarch64_abis[] = { | |
7343 | {"ilp32", AARCH64_ABI_ILP32}, | |
7344 | {"lp64", AARCH64_ABI_LP64}, | |
7345 | {NULL, 0} | |
7346 | }; | |
7347 | ||
7348 | static int | |
7349 | aarch64_parse_abi (char *str) | |
7350 | { | |
7351 | const struct aarch64_option_abi_value_table *opt; | |
7352 | size_t optlen = strlen (str); | |
7353 | ||
7354 | if (optlen == 0) | |
7355 | { | |
7356 | as_bad (_("missing abi name `%s'"), str); | |
7357 | return 0; | |
7358 | } | |
7359 | ||
7360 | for (opt = aarch64_abis; opt->name != NULL; opt++) | |
7361 | if (strlen (opt->name) == optlen && strncmp (str, opt->name, optlen) == 0) | |
7362 | { | |
7363 | aarch64_abi = opt->value; | |
7364 | return 1; | |
7365 | } | |
7366 | ||
7367 | as_bad (_("unknown abi `%s'\n"), str); | |
7368 | return 0; | |
7369 | } | |
7370 | ||
a06ea964 | 7371 | static struct aarch64_long_option_table aarch64_long_opts[] = { |
69091a2c YZ |
7372 | #ifdef OBJ_ELF |
7373 | {"mabi=", N_("<abi name>\t specify for ABI <abi name>"), | |
7374 | aarch64_parse_abi, NULL}, | |
7375 | #endif /* OBJ_ELF */ | |
a06ea964 NC |
7376 | {"mcpu=", N_("<cpu name>\t assemble for CPU <cpu name>"), |
7377 | aarch64_parse_cpu, NULL}, | |
7378 | {"march=", N_("<arch name>\t assemble for architecture <arch name>"), | |
7379 | aarch64_parse_arch, NULL}, | |
7380 | {NULL, NULL, 0, NULL} | |
7381 | }; | |
7382 | ||
7383 | int | |
7384 | md_parse_option (int c, char *arg) | |
7385 | { | |
7386 | struct aarch64_option_table *opt; | |
7387 | struct aarch64_long_option_table *lopt; | |
7388 | ||
7389 | switch (c) | |
7390 | { | |
7391 | #ifdef OPTION_EB | |
7392 | case OPTION_EB: | |
7393 | target_big_endian = 1; | |
7394 | break; | |
7395 | #endif | |
7396 | ||
7397 | #ifdef OPTION_EL | |
7398 | case OPTION_EL: | |
7399 | target_big_endian = 0; | |
7400 | break; | |
7401 | #endif | |
7402 | ||
7403 | case 'a': | |
7404 | /* Listing option. Just ignore these, we don't support additional | |
7405 | ones. */ | |
7406 | return 0; | |
7407 | ||
7408 | default: | |
7409 | for (opt = aarch64_opts; opt->option != NULL; opt++) | |
7410 | { | |
7411 | if (c == opt->option[0] | |
7412 | && ((arg == NULL && opt->option[1] == 0) | |
7413 | || streq (arg, opt->option + 1))) | |
7414 | { | |
7415 | /* If the option is deprecated, tell the user. */ | |
7416 | if (opt->deprecated != NULL) | |
7417 | as_tsktsk (_("option `-%c%s' is deprecated: %s"), c, | |
7418 | arg ? arg : "", _(opt->deprecated)); | |
7419 | ||
7420 | if (opt->var != NULL) | |
7421 | *opt->var = opt->value; | |
7422 | ||
7423 | return 1; | |
7424 | } | |
7425 | } | |
7426 | ||
7427 | for (lopt = aarch64_long_opts; lopt->option != NULL; lopt++) | |
7428 | { | |
7429 | /* These options are expected to have an argument. */ | |
7430 | if (c == lopt->option[0] | |
7431 | && arg != NULL | |
7432 | && strncmp (arg, lopt->option + 1, | |
7433 | strlen (lopt->option + 1)) == 0) | |
7434 | { | |
7435 | /* If the option is deprecated, tell the user. */ | |
7436 | if (lopt->deprecated != NULL) | |
7437 | as_tsktsk (_("option `-%c%s' is deprecated: %s"), c, arg, | |
7438 | _(lopt->deprecated)); | |
7439 | ||
7440 | /* Call the sup-option parser. */ | |
7441 | return lopt->func (arg + strlen (lopt->option) - 1); | |
7442 | } | |
7443 | } | |
7444 | ||
7445 | return 0; | |
7446 | } | |
7447 | ||
7448 | return 1; | |
7449 | } | |
7450 | ||
7451 | void | |
7452 | md_show_usage (FILE * fp) | |
7453 | { | |
7454 | struct aarch64_option_table *opt; | |
7455 | struct aarch64_long_option_table *lopt; | |
7456 | ||
7457 | fprintf (fp, _(" AArch64-specific assembler options:\n")); | |
7458 | ||
7459 | for (opt = aarch64_opts; opt->option != NULL; opt++) | |
7460 | if (opt->help != NULL) | |
7461 | fprintf (fp, " -%-23s%s\n", opt->option, _(opt->help)); | |
7462 | ||
7463 | for (lopt = aarch64_long_opts; lopt->option != NULL; lopt++) | |
7464 | if (lopt->help != NULL) | |
7465 | fprintf (fp, " -%s%s\n", lopt->option, _(lopt->help)); | |
7466 | ||
7467 | #ifdef OPTION_EB | |
7468 | fprintf (fp, _("\ | |
7469 | -EB assemble code for a big-endian cpu\n")); | |
7470 | #endif | |
7471 | ||
7472 | #ifdef OPTION_EL | |
7473 | fprintf (fp, _("\ | |
7474 | -EL assemble code for a little-endian cpu\n")); | |
7475 | #endif | |
7476 | } | |
7477 | ||
7478 | /* Parse a .cpu directive. */ | |
7479 | ||
7480 | static void | |
7481 | s_aarch64_cpu (int ignored ATTRIBUTE_UNUSED) | |
7482 | { | |
7483 | const struct aarch64_cpu_option_table *opt; | |
7484 | char saved_char; | |
7485 | char *name; | |
7486 | char *ext; | |
7487 | size_t optlen; | |
7488 | ||
7489 | name = input_line_pointer; | |
7490 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
7491 | input_line_pointer++; | |
7492 | saved_char = *input_line_pointer; | |
7493 | *input_line_pointer = 0; | |
7494 | ||
7495 | ext = strchr (name, '+'); | |
7496 | ||
7497 | if (ext != NULL) | |
7498 | optlen = ext - name; | |
7499 | else | |
7500 | optlen = strlen (name); | |
7501 | ||
7502 | /* Skip the first "all" entry. */ | |
7503 | for (opt = aarch64_cpus + 1; opt->name != NULL; opt++) | |
7504 | if (strlen (opt->name) == optlen | |
7505 | && strncmp (name, opt->name, optlen) == 0) | |
7506 | { | |
7507 | mcpu_cpu_opt = &opt->value; | |
7508 | if (ext != NULL) | |
7509 | if (!aarch64_parse_features (ext, &mcpu_cpu_opt)) | |
7510 | return; | |
7511 | ||
7512 | cpu_variant = *mcpu_cpu_opt; | |
7513 | ||
7514 | *input_line_pointer = saved_char; | |
7515 | demand_empty_rest_of_line (); | |
7516 | return; | |
7517 | } | |
7518 | as_bad (_("unknown cpu `%s'"), name); | |
7519 | *input_line_pointer = saved_char; | |
7520 | ignore_rest_of_line (); | |
7521 | } | |
7522 | ||
7523 | ||
7524 | /* Parse a .arch directive. */ | |
7525 | ||
7526 | static void | |
7527 | s_aarch64_arch (int ignored ATTRIBUTE_UNUSED) | |
7528 | { | |
7529 | const struct aarch64_arch_option_table *opt; | |
7530 | char saved_char; | |
7531 | char *name; | |
7532 | char *ext; | |
7533 | size_t optlen; | |
7534 | ||
7535 | name = input_line_pointer; | |
7536 | while (*input_line_pointer && !ISSPACE (*input_line_pointer)) | |
7537 | input_line_pointer++; | |
7538 | saved_char = *input_line_pointer; | |
7539 | *input_line_pointer = 0; | |
7540 | ||
7541 | ext = strchr (name, '+'); | |
7542 | ||
7543 | if (ext != NULL) | |
7544 | optlen = ext - name; | |
7545 | else | |
7546 | optlen = strlen (name); | |
7547 | ||
7548 | /* Skip the first "all" entry. */ | |
7549 | for (opt = aarch64_archs + 1; opt->name != NULL; opt++) | |
7550 | if (strlen (opt->name) == optlen | |
7551 | && strncmp (name, opt->name, optlen) == 0) | |
7552 | { | |
7553 | mcpu_cpu_opt = &opt->value; | |
7554 | if (ext != NULL) | |
7555 | if (!aarch64_parse_features (ext, &mcpu_cpu_opt)) | |
7556 | return; | |
7557 | ||
7558 | cpu_variant = *mcpu_cpu_opt; | |
7559 | ||
7560 | *input_line_pointer = saved_char; | |
7561 | demand_empty_rest_of_line (); | |
7562 | return; | |
7563 | } | |
7564 | ||
7565 | as_bad (_("unknown architecture `%s'\n"), name); | |
7566 | *input_line_pointer = saved_char; | |
7567 | ignore_rest_of_line (); | |
7568 | } | |
7569 | ||
7570 | /* Copy symbol information. */ | |
7571 | ||
7572 | void | |
7573 | aarch64_copy_symbol_attributes (symbolS * dest, symbolS * src) | |
7574 | { | |
7575 | AARCH64_GET_FLAG (dest) = AARCH64_GET_FLAG (src); | |
7576 | } |