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e23eba97 | 1 | /* tc-riscv.c -- RISC-V assembler |
b3adc24a | 2 | Copyright (C) 2011-2020 Free Software Foundation, Inc. |
e23eba97 NC |
3 | |
4 | Contributed by Andrew Waterman (andrew@sifive.com). | |
5 | Based on MIPS target. | |
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, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GAS is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; see the file COPYING3. If not, | |
21 | see <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "config.h" | |
25 | #include "subsegs.h" | |
26 | #include "safe-ctype.h" | |
27 | ||
28 | #include "itbl-ops.h" | |
29 | #include "dwarf2dbg.h" | |
30 | #include "dw2gencfi.h" | |
31 | ||
1080bf78 | 32 | #include "bfd/elfxx-riscv.h" |
e23eba97 NC |
33 | #include "elf/riscv.h" |
34 | #include "opcode/riscv.h" | |
35 | ||
36 | #include <stdint.h> | |
37 | ||
38 | /* Information about an instruction, including its format, operands | |
39 | and fixups. */ | |
40 | struct riscv_cl_insn | |
41 | { | |
42 | /* The opcode's entry in riscv_opcodes. */ | |
43 | const struct riscv_opcode *insn_mo; | |
44 | ||
45 | /* The encoded instruction bits. */ | |
46 | insn_t insn_opcode; | |
47 | ||
48 | /* The frag that contains the instruction. */ | |
49 | struct frag *frag; | |
50 | ||
51 | /* The offset into FRAG of the first instruction byte. */ | |
52 | long where; | |
53 | ||
54 | /* The relocs associated with the instruction, if any. */ | |
55 | fixS *fixp; | |
56 | }; | |
57 | ||
58 | #ifndef DEFAULT_ARCH | |
59 | #define DEFAULT_ARCH "riscv64" | |
60 | #endif | |
61 | ||
2dc8dd17 JW |
62 | #ifndef DEFAULT_RISCV_ATTR |
63 | #define DEFAULT_RISCV_ATTR 0 | |
64 | #endif | |
65 | ||
8f595e9b NC |
66 | /* Let riscv_after_parse_args set the default value according to xlen. */ |
67 | ||
68 | #ifndef DEFAULT_RISCV_ARCH_WITH_EXT | |
69 | #define DEFAULT_RISCV_ARCH_WITH_EXT NULL | |
70 | #endif | |
71 | ||
72 | /* The default ISA spec is set to 2.2 rather than the lastest version. | |
73 | The reason is that compiler generates the ISA string with fixed 2p0 | |
74 | verisons only for the RISCV ELF architecture attributes, but not for | |
75 | the -march option. Therefore, we should update the compiler or linker | |
76 | to resolve this problem. */ | |
77 | ||
78 | #ifndef DEFAULT_RISCV_ISA_SPEC | |
79 | #define DEFAULT_RISCV_ISA_SPEC "2.2" | |
80 | #endif | |
81 | ||
82 | #ifndef DEFAULT_RISCV_PRIV_SPEC | |
83 | #define DEFAULT_RISCV_PRIV_SPEC "1.11" | |
84 | #endif | |
85 | ||
e23eba97 | 86 | static const char default_arch[] = DEFAULT_ARCH; |
8f595e9b NC |
87 | static const char *default_arch_with_ext = DEFAULT_RISCV_ARCH_WITH_EXT; |
88 | static enum riscv_isa_spec_class default_isa_spec = ISA_SPEC_CLASS_NONE; | |
89 | static enum riscv_priv_spec_class default_priv_spec = PRIV_SPEC_CLASS_NONE; | |
e23eba97 | 90 | |
2922d21d AW |
91 | static unsigned xlen = 0; /* width of an x-register */ |
92 | static unsigned abi_xlen = 0; /* width of a pointer in the ABI */ | |
7f999549 | 93 | static bfd_boolean rve_abi = FALSE; |
6e1605e4 NC |
94 | enum float_abi { |
95 | FLOAT_ABI_DEFAULT = -1, | |
96 | FLOAT_ABI_SOFT, | |
97 | FLOAT_ABI_SINGLE, | |
98 | FLOAT_ABI_DOUBLE, | |
99 | FLOAT_ABI_QUAD | |
100 | }; | |
101 | static enum float_abi float_abi = FLOAT_ABI_DEFAULT; | |
e23eba97 | 102 | |
2922d21d | 103 | #define LOAD_ADDRESS_INSN (abi_xlen == 64 ? "ld" : "lw") |
e23eba97 NC |
104 | #define ADD32_INSN (xlen == 64 ? "addiw" : "addi") |
105 | ||
106 | static unsigned elf_flags = 0; | |
107 | ||
8f595e9b NC |
108 | /* Set the default_isa_spec. Return 0 if the input spec string isn't |
109 | supported. Otherwise, return 1. */ | |
110 | ||
111 | static int | |
112 | riscv_set_default_isa_spec (const char *s) | |
113 | { | |
114 | enum riscv_isa_spec_class class; | |
115 | if (!riscv_get_isa_spec_class (s, &class)) | |
116 | { | |
117 | as_bad ("Unknown default ISA spec `%s' set by " | |
118 | "-misa-spec or --with-isa-spec", s); | |
119 | return 0; | |
120 | } | |
121 | else | |
122 | default_isa_spec = class; | |
123 | return 1; | |
124 | } | |
125 | ||
126 | /* Set the default_priv_spec, assembler will find the suitable CSR address | |
127 | according to default_priv_spec. We will try to check priv attributes if | |
128 | the input string is NULL. Return 0 if the input priv spec string isn't | |
129 | supported. Otherwise, return 1. */ | |
130 | ||
131 | static int | |
132 | riscv_set_default_priv_spec (const char *s) | |
133 | { | |
134 | enum riscv_priv_spec_class class; | |
135 | unsigned major, minor, revision; | |
136 | obj_attribute *attr; | |
8f595e9b NC |
137 | |
138 | /* Find the corresponding priv spec class. */ | |
139 | if (riscv_get_priv_spec_class (s, &class)) | |
140 | { | |
141 | default_priv_spec = class; | |
142 | return 1; | |
143 | } | |
144 | ||
145 | if (s != NULL) | |
146 | { | |
147 | as_bad (_("Unknown default privilege spec `%s' set by " | |
148 | "-mpriv-spec or --with-priv-spec"), s); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | /* Try to set the default_priv_spec according to the priv attributes. */ | |
153 | attr = elf_known_obj_attributes_proc (stdoutput); | |
154 | major = (unsigned) attr[Tag_RISCV_priv_spec].i; | |
155 | minor = (unsigned) attr[Tag_RISCV_priv_spec_minor].i; | |
156 | revision = (unsigned) attr[Tag_RISCV_priv_spec_revision].i; | |
157 | ||
39ff0b81 NC |
158 | if (riscv_get_priv_spec_class_from_numbers (major, |
159 | minor, | |
160 | revision, | |
161 | &class)) | |
8f595e9b | 162 | { |
39ff0b81 NC |
163 | /* The priv attributes setting 0.0.0 is meaningless. We should have set |
164 | the default_priv_spec by md_parse_option and riscv_after_parse_args, | |
165 | so just skip the following setting. */ | |
166 | if (class == PRIV_SPEC_CLASS_NONE) | |
167 | return 1; | |
8f595e9b | 168 | |
8f595e9b | 169 | default_priv_spec = class; |
8f595e9b NC |
170 | return 1; |
171 | } | |
172 | ||
173 | /* Still can not find the priv spec class. */ | |
ddc73fa9 | 174 | as_bad (_("Unknown default privilege spec `%d.%d.%d' set by " |
8f595e9b | 175 | "privilege attributes"), major, minor, revision); |
8f595e9b NC |
176 | return 0; |
177 | } | |
178 | ||
e23eba97 NC |
179 | /* This is the set of options which the .option pseudo-op may modify. */ |
180 | ||
181 | struct riscv_set_options | |
182 | { | |
183 | int pic; /* Generate position-independent code. */ | |
184 | int rvc; /* Generate RVC code. */ | |
7f999549 | 185 | int rve; /* Generate RVE code. */ |
45f76423 | 186 | int relax; /* Emit relocs the linker is allowed to relax. */ |
2dc8dd17 | 187 | int arch_attr; /* Emit arch attribute. */ |
2ca89224 | 188 | int csr_check; /* Enable the CSR checking. */ |
e23eba97 NC |
189 | }; |
190 | ||
191 | static struct riscv_set_options riscv_opts = | |
192 | { | |
193 | 0, /* pic */ | |
194 | 0, /* rvc */ | |
7f999549 | 195 | 0, /* rve */ |
45f76423 | 196 | 1, /* relax */ |
2dc8dd17 | 197 | DEFAULT_RISCV_ATTR, /* arch_attr */ |
2ca89224 | 198 | 0. /* csr_check */ |
e23eba97 NC |
199 | }; |
200 | ||
201 | static void | |
202 | riscv_set_rvc (bfd_boolean rvc_value) | |
203 | { | |
204 | if (rvc_value) | |
205 | elf_flags |= EF_RISCV_RVC; | |
206 | ||
207 | riscv_opts.rvc = rvc_value; | |
208 | } | |
209 | ||
7f999549 JW |
210 | static void |
211 | riscv_set_rve (bfd_boolean rve_value) | |
212 | { | |
213 | riscv_opts.rve = rve_value; | |
214 | } | |
215 | ||
1080bf78 | 216 | static riscv_subset_list_t riscv_subsets; |
e23eba97 NC |
217 | |
218 | static bfd_boolean | |
1080bf78 | 219 | riscv_subset_supports (const char *feature) |
e23eba97 | 220 | { |
1080bf78 JW |
221 | if (riscv_opts.rvc && (strcasecmp (feature, "c") == 0)) |
222 | return TRUE; | |
e23eba97 | 223 | |
1080bf78 | 224 | return riscv_lookup_subset (&riscv_subsets, feature) != NULL; |
e23eba97 NC |
225 | } |
226 | ||
43135d3b | 227 | static bfd_boolean |
7e9ad3a3 | 228 | riscv_multi_subset_supports (enum riscv_insn_class insn_class) |
43135d3b | 229 | { |
7e9ad3a3 JW |
230 | switch (insn_class) |
231 | { | |
232 | case INSN_CLASS_I: return riscv_subset_supports ("i"); | |
233 | case INSN_CLASS_C: return riscv_subset_supports ("c"); | |
234 | case INSN_CLASS_A: return riscv_subset_supports ("a"); | |
235 | case INSN_CLASS_M: return riscv_subset_supports ("m"); | |
236 | case INSN_CLASS_F: return riscv_subset_supports ("f"); | |
237 | case INSN_CLASS_D: return riscv_subset_supports ("d"); | |
238 | case INSN_CLASS_D_AND_C: | |
239 | return riscv_subset_supports ("d") && riscv_subset_supports ("c"); | |
240 | ||
241 | case INSN_CLASS_F_AND_C: | |
242 | return riscv_subset_supports ("f") && riscv_subset_supports ("c"); | |
43135d3b | 243 | |
7e9ad3a3 | 244 | case INSN_CLASS_Q: return riscv_subset_supports ("q"); |
43135d3b | 245 | |
7e9ad3a3 JW |
246 | default: |
247 | as_fatal ("Unreachable"); | |
248 | return FALSE; | |
249 | } | |
43135d3b JW |
250 | } |
251 | ||
8f595e9b | 252 | /* Handle of the extension with version hash table. */ |
629310ab | 253 | static htab_t ext_version_hash = NULL; |
8f595e9b | 254 | |
629310ab | 255 | static htab_t |
8f595e9b NC |
256 | init_ext_version_hash (const struct riscv_ext_version *table) |
257 | { | |
258 | int i = 0; | |
629310ab | 259 | htab_t hash = str_htab_create (); |
8f595e9b NC |
260 | |
261 | while (table[i].name) | |
262 | { | |
263 | const char *name = table[i].name; | |
fe0e921f AM |
264 | if (str_hash_insert (hash, name, &table[i], 0) != NULL) |
265 | as_fatal (_("duplicate %s"), name); | |
8f595e9b NC |
266 | |
267 | i++; | |
268 | while (table[i].name | |
269 | && strcmp (table[i].name, name) == 0) | |
270 | i++; | |
271 | } | |
272 | ||
273 | return hash; | |
274 | } | |
275 | ||
276 | static void | |
277 | riscv_get_default_ext_version (const char *name, | |
278 | unsigned int *major_version, | |
279 | unsigned int *minor_version) | |
280 | { | |
281 | struct riscv_ext_version *ext; | |
282 | ||
283 | *major_version = 0; | |
284 | *minor_version = 0; | |
285 | ||
286 | if (name == NULL || default_isa_spec == ISA_SPEC_CLASS_NONE) | |
287 | return; | |
288 | ||
629310ab | 289 | ext = (struct riscv_ext_version *) str_hash_find (ext_version_hash, name); |
8f595e9b NC |
290 | while (ext |
291 | && ext->name | |
292 | && strcmp (ext->name, name) == 0) | |
293 | { | |
294 | if (ext->isa_spec_class == default_isa_spec) | |
295 | { | |
296 | *major_version = ext->major_version; | |
297 | *minor_version = ext->minor_version; | |
298 | return; | |
299 | } | |
300 | ext++; | |
301 | } | |
302 | } | |
303 | ||
2922d21d | 304 | /* Set which ISA and extensions are available. */ |
e23eba97 | 305 | |
e23eba97 | 306 | static void |
2922d21d | 307 | riscv_set_arch (const char *s) |
e23eba97 | 308 | { |
1080bf78 JW |
309 | riscv_parse_subset_t rps; |
310 | rps.subset_list = &riscv_subsets; | |
311 | rps.error_handler = as_fatal; | |
312 | rps.xlen = &xlen; | |
8f595e9b NC |
313 | rps.get_default_version = riscv_get_default_ext_version; |
314 | ||
315 | if (s == NULL) | |
316 | return; | |
7f999549 | 317 | |
1080bf78 JW |
318 | riscv_release_subset_list (&riscv_subsets); |
319 | riscv_parse_subset (&rps, s); | |
e23eba97 NC |
320 | } |
321 | ||
6e1605e4 NC |
322 | /* Indicate -mabi= option is explictly set. */ |
323 | static bfd_boolean explicit_mabi = FALSE; | |
324 | ||
325 | static void | |
326 | riscv_set_abi (unsigned new_xlen, enum float_abi new_float_abi, bfd_boolean rve) | |
327 | { | |
328 | abi_xlen = new_xlen; | |
329 | float_abi = new_float_abi; | |
330 | rve_abi = rve; | |
331 | } | |
332 | ||
333 | /* If the -mabi option isn't set, then we set the abi according to the arch | |
334 | string. Otherwise, check if there are conflicts between architecture | |
335 | and abi setting. */ | |
336 | ||
337 | static void | |
338 | riscv_set_abi_by_arch (void) | |
339 | { | |
340 | if (!explicit_mabi) | |
341 | { | |
342 | if (riscv_subset_supports ("q")) | |
343 | riscv_set_abi (xlen, FLOAT_ABI_QUAD, FALSE); | |
344 | else if (riscv_subset_supports ("d")) | |
345 | riscv_set_abi (xlen, FLOAT_ABI_DOUBLE, FALSE); | |
346 | else | |
347 | riscv_set_abi (xlen, FLOAT_ABI_SOFT, FALSE); | |
348 | } | |
349 | else | |
350 | { | |
351 | gas_assert (abi_xlen != 0 && xlen != 0 && float_abi != FLOAT_ABI_DEFAULT); | |
352 | if (abi_xlen > xlen) | |
353 | as_bad ("can't have %d-bit ABI on %d-bit ISA", abi_xlen, xlen); | |
354 | else if (abi_xlen < xlen) | |
355 | as_bad ("%d-bit ABI not yet supported on %d-bit ISA", abi_xlen, xlen); | |
356 | } | |
357 | ||
358 | /* Update the EF_RISCV_FLOAT_ABI field of elf_flags. */ | |
359 | elf_flags &= ~EF_RISCV_FLOAT_ABI; | |
360 | elf_flags |= float_abi << 1; | |
361 | ||
362 | if (rve_abi) | |
363 | elf_flags |= EF_RISCV_RVE; | |
364 | } | |
365 | ||
e23eba97 | 366 | /* Handle of the OPCODE hash table. */ |
629310ab | 367 | static htab_t op_hash = NULL; |
e23eba97 | 368 | |
0e35537d | 369 | /* Handle of the type of .insn hash table. */ |
629310ab | 370 | static htab_t insn_type_hash = NULL; |
0e35537d | 371 | |
e23eba97 NC |
372 | /* This array holds the chars that always start a comment. If the |
373 | pre-processor is disabled, these aren't very useful */ | |
374 | const char comment_chars[] = "#"; | |
375 | ||
376 | /* This array holds the chars that only start a comment at the beginning of | |
377 | a line. If the line seems to have the form '# 123 filename' | |
378 | .line and .file directives will appear in the pre-processed output */ | |
379 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
380 | first line of the input file. This is because the compiler outputs | |
381 | #NO_APP at the beginning of its output. */ | |
382 | /* Also note that C style comments are always supported. */ | |
383 | const char line_comment_chars[] = "#"; | |
384 | ||
385 | /* This array holds machine specific line separator characters. */ | |
386 | const char line_separator_chars[] = ";"; | |
387 | ||
388 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
389 | const char EXP_CHARS[] = "eE"; | |
390 | ||
391 | /* Chars that mean this number is a floating point constant */ | |
392 | /* As in 0f12.456 */ | |
393 | /* or 0d1.2345e12 */ | |
394 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
395 | ||
2dc8dd17 JW |
396 | /* Indicate we are already assemble any instructions or not. */ |
397 | static bfd_boolean start_assemble = FALSE; | |
398 | ||
8f595e9b NC |
399 | /* Indicate ELF attributes are explictly set. */ |
400 | static bfd_boolean explicit_attr = FALSE; | |
2dc8dd17 | 401 | |
1a79004f NC |
402 | /* Indicate CSR or priv instructions are explictly used. */ |
403 | static bfd_boolean explicit_priv_attr = FALSE; | |
3fc6c3dc | 404 | |
e23eba97 NC |
405 | /* Macros for encoding relaxation state for RVC branches and far jumps. */ |
406 | #define RELAX_BRANCH_ENCODE(uncond, rvc, length) \ | |
407 | ((relax_substateT) \ | |
408 | (0xc0000000 \ | |
409 | | ((uncond) ? 1 : 0) \ | |
410 | | ((rvc) ? 2 : 0) \ | |
411 | | ((length) << 2))) | |
412 | #define RELAX_BRANCH_P(i) (((i) & 0xf0000000) == 0xc0000000) | |
413 | #define RELAX_BRANCH_LENGTH(i) (((i) >> 2) & 0xF) | |
414 | #define RELAX_BRANCH_RVC(i) (((i) & 2) != 0) | |
415 | #define RELAX_BRANCH_UNCOND(i) (((i) & 1) != 0) | |
416 | ||
417 | /* Is the given value a sign-extended 32-bit value? */ | |
418 | #define IS_SEXT_32BIT_NUM(x) \ | |
419 | (((x) &~ (offsetT) 0x7fffffff) == 0 \ | |
420 | || (((x) &~ (offsetT) 0x7fffffff) == ~ (offsetT) 0x7fffffff)) | |
421 | ||
422 | /* Is the given value a zero-extended 32-bit value? Or a negated one? */ | |
423 | #define IS_ZEXT_32BIT_NUM(x) \ | |
424 | (((x) &~ (offsetT) 0xffffffff) == 0 \ | |
425 | || (((x) &~ (offsetT) 0xffffffff) == ~ (offsetT) 0xffffffff)) | |
426 | ||
427 | /* Change INSN's opcode so that the operand given by FIELD has value VALUE. | |
428 | INSN is a riscv_cl_insn structure and VALUE is evaluated exactly once. */ | |
429 | #define INSERT_OPERAND(FIELD, INSN, VALUE) \ | |
430 | INSERT_BITS ((INSN).insn_opcode, VALUE, OP_MASK_##FIELD, OP_SH_##FIELD) | |
431 | ||
432 | /* Determine if an instruction matches an opcode. */ | |
433 | #define OPCODE_MATCHES(OPCODE, OP) \ | |
434 | (((OPCODE) & MASK_##OP) == MATCH_##OP) | |
435 | ||
436 | static char *expr_end; | |
437 | ||
438 | /* The default target format to use. */ | |
439 | ||
440 | const char * | |
441 | riscv_target_format (void) | |
442 | { | |
443 | return xlen == 64 ? "elf64-littleriscv" : "elf32-littleriscv"; | |
444 | } | |
445 | ||
446 | /* Return the length of instruction INSN. */ | |
447 | ||
448 | static inline unsigned int | |
449 | insn_length (const struct riscv_cl_insn *insn) | |
450 | { | |
451 | return riscv_insn_length (insn->insn_opcode); | |
452 | } | |
453 | ||
454 | /* Initialise INSN from opcode entry MO. Leave its position unspecified. */ | |
455 | ||
456 | static void | |
457 | create_insn (struct riscv_cl_insn *insn, const struct riscv_opcode *mo) | |
458 | { | |
459 | insn->insn_mo = mo; | |
460 | insn->insn_opcode = mo->match; | |
461 | insn->frag = NULL; | |
462 | insn->where = 0; | |
463 | insn->fixp = NULL; | |
464 | } | |
465 | ||
466 | /* Install INSN at the location specified by its "frag" and "where" fields. */ | |
467 | ||
468 | static void | |
469 | install_insn (const struct riscv_cl_insn *insn) | |
470 | { | |
471 | char *f = insn->frag->fr_literal + insn->where; | |
472 | md_number_to_chars (f, insn->insn_opcode, insn_length (insn)); | |
473 | } | |
474 | ||
475 | /* Move INSN to offset WHERE in FRAG. Adjust the fixups accordingly | |
476 | and install the opcode in the new location. */ | |
477 | ||
478 | static void | |
479 | move_insn (struct riscv_cl_insn *insn, fragS *frag, long where) | |
480 | { | |
481 | insn->frag = frag; | |
482 | insn->where = where; | |
483 | if (insn->fixp != NULL) | |
484 | { | |
485 | insn->fixp->fx_frag = frag; | |
486 | insn->fixp->fx_where = where; | |
487 | } | |
488 | install_insn (insn); | |
489 | } | |
490 | ||
491 | /* Add INSN to the end of the output. */ | |
492 | ||
493 | static void | |
494 | add_fixed_insn (struct riscv_cl_insn *insn) | |
495 | { | |
496 | char *f = frag_more (insn_length (insn)); | |
497 | move_insn (insn, frag_now, f - frag_now->fr_literal); | |
498 | } | |
499 | ||
500 | static void | |
501 | add_relaxed_insn (struct riscv_cl_insn *insn, int max_chars, int var, | |
502 | relax_substateT subtype, symbolS *symbol, offsetT offset) | |
503 | { | |
504 | frag_grow (max_chars); | |
505 | move_insn (insn, frag_now, frag_more (0) - frag_now->fr_literal); | |
506 | frag_var (rs_machine_dependent, max_chars, var, | |
507 | subtype, symbol, offset, NULL); | |
508 | } | |
509 | ||
510 | /* Compute the length of a branch sequence, and adjust the stored length | |
511 | accordingly. If FRAGP is NULL, the worst-case length is returned. */ | |
512 | ||
513 | static unsigned | |
514 | relaxed_branch_length (fragS *fragp, asection *sec, int update) | |
515 | { | |
516 | int jump, rvc, length = 8; | |
517 | ||
518 | if (!fragp) | |
519 | return length; | |
520 | ||
521 | jump = RELAX_BRANCH_UNCOND (fragp->fr_subtype); | |
522 | rvc = RELAX_BRANCH_RVC (fragp->fr_subtype); | |
523 | length = RELAX_BRANCH_LENGTH (fragp->fr_subtype); | |
524 | ||
525 | /* Assume jumps are in range; the linker will catch any that aren't. */ | |
526 | length = jump ? 4 : 8; | |
527 | ||
528 | if (fragp->fr_symbol != NULL | |
529 | && S_IS_DEFINED (fragp->fr_symbol) | |
01156111 | 530 | && !S_IS_WEAK (fragp->fr_symbol) |
e23eba97 NC |
531 | && sec == S_GET_SEGMENT (fragp->fr_symbol)) |
532 | { | |
533 | offsetT val = S_GET_VALUE (fragp->fr_symbol) + fragp->fr_offset; | |
534 | bfd_vma rvc_range = jump ? RVC_JUMP_REACH : RVC_BRANCH_REACH; | |
535 | val -= fragp->fr_address + fragp->fr_fix; | |
536 | ||
537 | if (rvc && (bfd_vma)(val + rvc_range/2) < rvc_range) | |
538 | length = 2; | |
539 | else if ((bfd_vma)(val + RISCV_BRANCH_REACH/2) < RISCV_BRANCH_REACH) | |
540 | length = 4; | |
541 | else if (!jump && rvc) | |
542 | length = 6; | |
543 | } | |
544 | ||
545 | if (update) | |
546 | fragp->fr_subtype = RELAX_BRANCH_ENCODE (jump, rvc, length); | |
547 | ||
548 | return length; | |
549 | } | |
550 | ||
0e35537d JW |
551 | /* Information about an opcode name, mnemonics and its value. */ |
552 | struct opcode_name_t | |
553 | { | |
554 | const char *name; | |
555 | unsigned int val; | |
556 | }; | |
557 | ||
558 | /* List for all supported opcode name. */ | |
559 | static const struct opcode_name_t opcode_name_list[] = | |
560 | { | |
561 | {"C0", 0x0}, | |
562 | {"C1", 0x1}, | |
563 | {"C2", 0x2}, | |
564 | ||
565 | {"LOAD", 0x03}, | |
566 | {"LOAD_FP", 0x07}, | |
567 | {"CUSTOM_0", 0x0b}, | |
568 | {"MISC_MEM", 0x0f}, | |
569 | {"OP_IMM", 0x13}, | |
570 | {"AUIPC", 0x17}, | |
571 | {"OP_IMM_32", 0x1b}, | |
572 | /* 48b 0x1f. */ | |
573 | ||
574 | {"STORE", 0x23}, | |
575 | {"STORE_FP", 0x27}, | |
576 | {"CUSTOM_1", 0x2b}, | |
577 | {"AMO", 0x2f}, | |
578 | {"OP", 0x33}, | |
579 | {"LUI", 0x37}, | |
580 | {"OP_32", 0x3b}, | |
581 | /* 64b 0x3f. */ | |
582 | ||
583 | {"MADD", 0x43}, | |
584 | {"MSUB", 0x47}, | |
585 | {"NMADD", 0x4f}, | |
586 | {"NMSUB", 0x4b}, | |
587 | {"OP_FP", 0x53}, | |
588 | /*reserved 0x57. */ | |
589 | {"CUSTOM_2", 0x5b}, | |
590 | /* 48b 0x5f. */ | |
591 | ||
592 | {"BRANCH", 0x63}, | |
593 | {"JALR", 0x67}, | |
594 | /*reserved 0x5b. */ | |
595 | {"JAL", 0x6f}, | |
596 | {"SYSTEM", 0x73}, | |
597 | /*reserved 0x77. */ | |
598 | {"CUSTOM_3", 0x7b}, | |
599 | /* >80b 0x7f. */ | |
600 | ||
601 | {NULL, 0} | |
602 | }; | |
603 | ||
604 | /* Hash table for lookup opcode name. */ | |
629310ab | 605 | static htab_t opcode_names_hash = NULL; |
0e35537d JW |
606 | |
607 | /* Initialization for hash table of opcode name. */ | |
608 | static void | |
609 | init_opcode_names_hash (void) | |
610 | { | |
0e35537d JW |
611 | const struct opcode_name_t *opcode; |
612 | ||
613 | for (opcode = &opcode_name_list[0]; opcode->name != NULL; ++opcode) | |
fe0e921f AM |
614 | if (str_hash_insert (opcode_names_hash, opcode->name, opcode, 0) != NULL) |
615 | as_fatal (_("duplicate %s"), opcode->name); | |
0e35537d JW |
616 | } |
617 | ||
618 | /* Find `s` is a valid opcode name or not, | |
619 | return the opcode name info if found. */ | |
620 | static const struct opcode_name_t * | |
621 | opcode_name_lookup (char **s) | |
622 | { | |
623 | char *e; | |
624 | char save_c; | |
625 | struct opcode_name_t *o; | |
626 | ||
627 | /* Find end of name. */ | |
628 | e = *s; | |
629 | if (is_name_beginner (*e)) | |
630 | ++e; | |
631 | while (is_part_of_name (*e)) | |
632 | ++e; | |
633 | ||
634 | /* Terminate name. */ | |
635 | save_c = *e; | |
636 | *e = '\0'; | |
637 | ||
629310ab | 638 | o = (struct opcode_name_t *) str_hash_find (opcode_names_hash, *s); |
0e35537d JW |
639 | |
640 | /* Advance to next token if one was recognized. */ | |
641 | if (o) | |
642 | *s = e; | |
643 | ||
644 | *e = save_c; | |
645 | expr_end = e; | |
646 | ||
647 | return o; | |
648 | } | |
649 | ||
e23eba97 NC |
650 | enum reg_class |
651 | { | |
652 | RCLASS_GPR, | |
653 | RCLASS_FPR, | |
8f595e9b NC |
654 | RCLASS_MAX, |
655 | ||
656 | RCLASS_CSR | |
e23eba97 NC |
657 | }; |
658 | ||
629310ab ML |
659 | static htab_t reg_names_hash = NULL; |
660 | static htab_t csr_extra_hash = NULL; | |
e23eba97 NC |
661 | |
662 | #define ENCODE_REG_HASH(cls, n) \ | |
663 | ((void *)(uintptr_t)((n) * RCLASS_MAX + (cls) + 1)) | |
664 | #define DECODE_REG_CLASS(hash) (((uintptr_t)(hash) - 1) % RCLASS_MAX) | |
665 | #define DECODE_REG_NUM(hash) (((uintptr_t)(hash) - 1) / RCLASS_MAX) | |
666 | ||
667 | static void | |
668 | hash_reg_name (enum reg_class class, const char *name, unsigned n) | |
669 | { | |
670 | void *hash = ENCODE_REG_HASH (class, n); | |
fe0e921f AM |
671 | if (str_hash_insert (reg_names_hash, name, hash, 0) != NULL) |
672 | as_fatal (_("duplicate %s"), name); | |
e23eba97 NC |
673 | } |
674 | ||
675 | static void | |
676 | hash_reg_names (enum reg_class class, const char * const names[], unsigned n) | |
677 | { | |
678 | unsigned i; | |
679 | ||
680 | for (i = 0; i < n; i++) | |
681 | hash_reg_name (class, names[i], i); | |
682 | } | |
683 | ||
8f595e9b NC |
684 | /* Init hash table csr_extra_hash to handle CSR. */ |
685 | static void | |
686 | riscv_init_csr_hash (const char *name, | |
687 | unsigned address, | |
688 | enum riscv_csr_class class, | |
689 | enum riscv_priv_spec_class define_version, | |
690 | enum riscv_priv_spec_class abort_version) | |
691 | { | |
692 | struct riscv_csr_extra *entry, *pre_entry; | |
8f595e9b NC |
693 | bfd_boolean need_enrty = TRUE; |
694 | ||
695 | pre_entry = NULL; | |
629310ab | 696 | entry = (struct riscv_csr_extra *) str_hash_find (csr_extra_hash, name); |
8f595e9b NC |
697 | while (need_enrty && entry != NULL) |
698 | { | |
699 | if (entry->csr_class == class | |
700 | && entry->address == address | |
701 | && entry->define_version == define_version | |
702 | && entry->abort_version == abort_version) | |
703 | need_enrty = FALSE; | |
704 | pre_entry = entry; | |
705 | entry = entry->next; | |
706 | } | |
707 | ||
708 | /* Duplicate setting for the CSR, just return and do nothing. */ | |
709 | if (!need_enrty) | |
710 | return; | |
bd0cf5a6 | 711 | |
8f595e9b NC |
712 | entry = XNEW (struct riscv_csr_extra); |
713 | entry->csr_class = class; | |
714 | entry->address = address; | |
715 | entry->define_version = define_version; | |
716 | entry->abort_version = abort_version; | |
5c505568 | 717 | entry->next = NULL; |
8f595e9b NC |
718 | |
719 | /* If the CSR hasn't been inserted in the hash table, then insert it. | |
720 | Otherwise, attach the extra information to the entry which is already | |
721 | in the hash table. */ | |
722 | if (pre_entry == NULL) | |
fe0e921f | 723 | str_hash_insert (csr_extra_hash, name, entry, 0); |
8f595e9b NC |
724 | else |
725 | pre_entry->next = entry; | |
726 | } | |
bd0cf5a6 | 727 | |
08ccfccf NC |
728 | /* Return the suitable CSR address after checking the ISA dependency and |
729 | priv spec versions. */ | |
bd0cf5a6 | 730 | |
08ccfccf NC |
731 | static unsigned int |
732 | riscv_csr_address (const char *csr_name, | |
733 | struct riscv_csr_extra *entry) | |
bd0cf5a6 | 734 | { |
08ccfccf NC |
735 | struct riscv_csr_extra *saved_entry = entry; |
736 | enum riscv_csr_class csr_class = entry->csr_class; | |
737 | bfd_boolean need_check_version = TRUE; | |
8f595e9b NC |
738 | bfd_boolean result = TRUE; |
739 | ||
8f595e9b | 740 | switch (csr_class) |
bd0cf5a6 | 741 | { |
8f595e9b NC |
742 | case CSR_CLASS_I: |
743 | result = riscv_subset_supports ("i"); | |
744 | break; | |
08ccfccf NC |
745 | case CSR_CLASS_I_32: |
746 | result = (xlen == 32 && riscv_subset_supports ("i")); | |
747 | break; | |
8f595e9b NC |
748 | case CSR_CLASS_F: |
749 | result = riscv_subset_supports ("f"); | |
08ccfccf | 750 | need_check_version = FALSE; |
8f595e9b | 751 | break; |
08ccfccf NC |
752 | case CSR_CLASS_DEBUG: |
753 | need_check_version = FALSE; | |
8f595e9b NC |
754 | break; |
755 | default: | |
756 | as_bad (_("internal: bad RISC-V CSR class (0x%x)"), csr_class); | |
bd0cf5a6 NC |
757 | } |
758 | ||
08ccfccf NC |
759 | /* Don't report the ISA conflict when -mcsr-check isn't set. */ |
760 | if (riscv_opts.csr_check && !result) | |
761 | as_warn (_("Invalid CSR `%s' for the current ISA"), csr_name); | |
8f595e9b NC |
762 | |
763 | while (entry != NULL) | |
bd0cf5a6 | 764 | { |
08ccfccf NC |
765 | if (!need_check_version |
766 | || (default_priv_spec >= entry->define_version | |
767 | && default_priv_spec < entry->abort_version)) | |
8f595e9b NC |
768 | { |
769 | /* Find the suitable CSR according to the specific version. */ | |
08ccfccf | 770 | return entry->address; |
8f595e9b NC |
771 | } |
772 | entry = entry->next; | |
773 | } | |
bd0cf5a6 | 774 | |
8f595e9b NC |
775 | /* We can not find the suitable CSR address according to the privilege |
776 | version. Therefore, we use the last defined value. Report the warning | |
777 | only when the -mcsr-check is set. Enable the -mcsr-check is recommended, | |
778 | otherwise, you may get the unexpected CSR address. */ | |
779 | if (riscv_opts.csr_check) | |
780 | { | |
781 | const char *priv_name = riscv_get_priv_spec_name (default_priv_spec); | |
782 | ||
783 | if (priv_name != NULL) | |
784 | as_warn (_("Invalid CSR `%s' for the privilege spec `%s'"), | |
785 | csr_name, priv_name); | |
bd0cf5a6 | 786 | } |
08ccfccf NC |
787 | |
788 | return saved_entry->address; | |
bd0cf5a6 NC |
789 | } |
790 | ||
8f595e9b NC |
791 | /* Once the CSR is defined, including the old privilege spec, then we call |
792 | riscv_csr_class_check and riscv_csr_version_check to do the further checking | |
793 | and get the corresponding address. Return -1 if the CSR is never been | |
794 | defined. Otherwise, return the address. */ | |
bd0cf5a6 | 795 | |
8f595e9b | 796 | static unsigned int |
bd0cf5a6 NC |
797 | reg_csr_lookup_internal (const char *s) |
798 | { | |
799 | struct riscv_csr_extra *r = | |
629310ab | 800 | (struct riscv_csr_extra *) str_hash_find (csr_extra_hash, s); |
bd0cf5a6 NC |
801 | |
802 | if (r == NULL) | |
8f595e9b | 803 | return -1U; |
bd0cf5a6 | 804 | |
8f595e9b NC |
805 | /* We just report the warning when the CSR is invalid. "Invalid CSR" means |
806 | the CSR was defined, but isn't allowed for the current ISA setting or | |
807 | the privilege spec. If the CSR is never been defined, then assembler | |
808 | will regard it as a "Unknown CSR" and report error. If user use number | |
809 | to set the CSR, but over the range (> 0xfff), then assembler will report | |
810 | "Improper CSR" error for it. */ | |
08ccfccf | 811 | return riscv_csr_address (s, r); |
bd0cf5a6 NC |
812 | } |
813 | ||
e23eba97 NC |
814 | static unsigned int |
815 | reg_lookup_internal (const char *s, enum reg_class class) | |
816 | { | |
8f595e9b NC |
817 | void *r; |
818 | ||
819 | if (class == RCLASS_CSR) | |
820 | return reg_csr_lookup_internal (s); | |
e23eba97 | 821 | |
629310ab | 822 | r = str_hash_find (reg_names_hash, s); |
e23eba97 NC |
823 | if (r == NULL || DECODE_REG_CLASS (r) != class) |
824 | return -1; | |
7f999549 JW |
825 | |
826 | if (riscv_opts.rve && class == RCLASS_GPR && DECODE_REG_NUM (r) > 15) | |
827 | return -1; | |
828 | ||
e23eba97 NC |
829 | return DECODE_REG_NUM (r); |
830 | } | |
831 | ||
832 | static bfd_boolean | |
833 | reg_lookup (char **s, enum reg_class class, unsigned int *regnop) | |
834 | { | |
835 | char *e; | |
836 | char save_c; | |
837 | int reg = -1; | |
838 | ||
839 | /* Find end of name. */ | |
840 | e = *s; | |
841 | if (is_name_beginner (*e)) | |
842 | ++e; | |
843 | while (is_part_of_name (*e)) | |
844 | ++e; | |
845 | ||
846 | /* Terminate name. */ | |
847 | save_c = *e; | |
848 | *e = '\0'; | |
849 | ||
850 | /* Look for the register. Advance to next token if one was recognized. */ | |
851 | if ((reg = reg_lookup_internal (*s, class)) >= 0) | |
852 | *s = e; | |
853 | ||
854 | *e = save_c; | |
855 | if (regnop) | |
856 | *regnop = reg; | |
857 | return reg >= 0; | |
858 | } | |
859 | ||
860 | static bfd_boolean | |
861 | arg_lookup (char **s, const char *const *array, size_t size, unsigned *regnop) | |
862 | { | |
863 | const char *p = strchr (*s, ','); | |
864 | size_t i, len = p ? (size_t)(p - *s) : strlen (*s); | |
865 | ||
bfb218e3 JW |
866 | if (len == 0) |
867 | return FALSE; | |
868 | ||
e23eba97 NC |
869 | for (i = 0; i < size; i++) |
870 | if (array[i] != NULL && strncmp (array[i], *s, len) == 0) | |
871 | { | |
872 | *regnop = i; | |
873 | *s += len; | |
874 | return TRUE; | |
875 | } | |
876 | ||
877 | return FALSE; | |
878 | } | |
879 | ||
880 | /* For consistency checking, verify that all bits are specified either | |
881 | by the match/mask part of the instruction definition, or by the | |
0e35537d JW |
882 | operand list. |
883 | ||
884 | `length` could be 0, 4 or 8, 0 for auto detection. */ | |
e23eba97 | 885 | static bfd_boolean |
0e35537d | 886 | validate_riscv_insn (const struct riscv_opcode *opc, int length) |
e23eba97 NC |
887 | { |
888 | const char *p = opc->args; | |
889 | char c; | |
890 | insn_t used_bits = opc->mask; | |
0e35537d JW |
891 | int insn_width; |
892 | insn_t required_bits; | |
893 | ||
894 | if (length == 0) | |
895 | insn_width = 8 * riscv_insn_length (opc->match); | |
896 | else | |
897 | insn_width = 8 * length; | |
898 | ||
899 | required_bits = ~0ULL >> (64 - insn_width); | |
e23eba97 NC |
900 | |
901 | if ((used_bits & opc->match) != (opc->match & required_bits)) | |
902 | { | |
903 | as_bad (_("internal: bad RISC-V opcode (mask error): %s %s"), | |
904 | opc->name, opc->args); | |
905 | return FALSE; | |
906 | } | |
907 | ||
908 | #define USE_BITS(mask,shift) (used_bits |= ((insn_t)(mask) << (shift))) | |
909 | while (*p) | |
910 | switch (c = *p++) | |
911 | { | |
912 | case 'C': /* RVC */ | |
913 | switch (c = *p++) | |
914 | { | |
1d65abb5 | 915 | case 'a': used_bits |= ENCODE_RVC_J_IMM (-1U); break; |
e23eba97 NC |
916 | case 'c': break; /* RS1, constrained to equal sp */ |
917 | case 'i': used_bits |= ENCODE_RVC_SIMM3(-1U); break; | |
1d65abb5 | 918 | case 'j': used_bits |= ENCODE_RVC_IMM (-1U); break; |
b416fe87 | 919 | case 'o': used_bits |= ENCODE_RVC_IMM (-1U); break; |
1d65abb5 AW |
920 | case 'k': used_bits |= ENCODE_RVC_LW_IMM (-1U); break; |
921 | case 'l': used_bits |= ENCODE_RVC_LD_IMM (-1U); break; | |
922 | case 'm': used_bits |= ENCODE_RVC_LWSP_IMM (-1U); break; | |
923 | case 'n': used_bits |= ENCODE_RVC_LDSP_IMM (-1U); break; | |
924 | case 'p': used_bits |= ENCODE_RVC_B_IMM (-1U); break; | |
e23eba97 NC |
925 | case 's': USE_BITS (OP_MASK_CRS1S, OP_SH_CRS1S); break; |
926 | case 't': USE_BITS (OP_MASK_CRS2S, OP_SH_CRS2S); break; | |
1d65abb5 AW |
927 | case 'u': used_bits |= ENCODE_RVC_IMM (-1U); break; |
928 | case 'v': used_bits |= ENCODE_RVC_IMM (-1U); break; | |
e23eba97 NC |
929 | case 'w': break; /* RS1S, constrained to equal RD */ |
930 | case 'x': break; /* RS2S, constrained to equal RD */ | |
ca0bc150 | 931 | case 'z': break; /* RS2S, contrained to be x0 */ |
1d65abb5 AW |
932 | case 'K': used_bits |= ENCODE_RVC_ADDI4SPN_IMM (-1U); break; |
933 | case 'L': used_bits |= ENCODE_RVC_ADDI16SP_IMM (-1U); break; | |
934 | case 'M': used_bits |= ENCODE_RVC_SWSP_IMM (-1U); break; | |
935 | case 'N': used_bits |= ENCODE_RVC_SDSP_IMM (-1U); break; | |
e23eba97 NC |
936 | case 'U': break; /* RS1, constrained to equal RD */ |
937 | case 'V': USE_BITS (OP_MASK_CRS2, OP_SH_CRS2); break; | |
1d65abb5 AW |
938 | case '<': used_bits |= ENCODE_RVC_IMM (-1U); break; |
939 | case '>': used_bits |= ENCODE_RVC_IMM (-1U); break; | |
0e35537d JW |
940 | case '8': used_bits |= ENCODE_RVC_UIMM8 (-1U); break; |
941 | case 'S': USE_BITS (OP_MASK_CRS1S, OP_SH_CRS1S); break; | |
e23eba97 NC |
942 | case 'T': USE_BITS (OP_MASK_CRS2, OP_SH_CRS2); break; |
943 | case 'D': USE_BITS (OP_MASK_CRS2S, OP_SH_CRS2S); break; | |
0e35537d JW |
944 | case 'F': /* funct */ |
945 | switch (c = *p++) | |
946 | { | |
4765cd61 | 947 | case '6': USE_BITS (OP_MASK_CFUNCT6, OP_SH_CFUNCT6); break; |
0e35537d JW |
948 | case '4': USE_BITS (OP_MASK_CFUNCT4, OP_SH_CFUNCT4); break; |
949 | case '3': USE_BITS (OP_MASK_CFUNCT3, OP_SH_CFUNCT3); break; | |
4765cd61 | 950 | case '2': USE_BITS (OP_MASK_CFUNCT2, OP_SH_CFUNCT2); break; |
0e35537d JW |
951 | default: |
952 | as_bad (_("internal: bad RISC-V opcode" | |
953 | " (unknown operand type `CF%c'): %s %s"), | |
954 | c, opc->name, opc->args); | |
955 | return FALSE; | |
956 | } | |
957 | break; | |
e23eba97 NC |
958 | default: |
959 | as_bad (_("internal: bad RISC-V opcode (unknown operand type `C%c'): %s %s"), | |
960 | c, opc->name, opc->args); | |
961 | return FALSE; | |
962 | } | |
963 | break; | |
964 | case ',': break; | |
965 | case '(': break; | |
966 | case ')': break; | |
967 | case '<': USE_BITS (OP_MASK_SHAMTW, OP_SH_SHAMTW); break; | |
968 | case '>': USE_BITS (OP_MASK_SHAMT, OP_SH_SHAMT); break; | |
969 | case 'A': break; | |
970 | case 'D': USE_BITS (OP_MASK_RD, OP_SH_RD); break; | |
971 | case 'Z': USE_BITS (OP_MASK_RS1, OP_SH_RS1); break; | |
972 | case 'E': USE_BITS (OP_MASK_CSR, OP_SH_CSR); break; | |
973 | case 'I': break; | |
974 | case 'R': USE_BITS (OP_MASK_RS3, OP_SH_RS3); break; | |
975 | case 'S': USE_BITS (OP_MASK_RS1, OP_SH_RS1); break; | |
976 | case 'U': USE_BITS (OP_MASK_RS1, OP_SH_RS1); /* fallthru */ | |
977 | case 'T': USE_BITS (OP_MASK_RS2, OP_SH_RS2); break; | |
978 | case 'd': USE_BITS (OP_MASK_RD, OP_SH_RD); break; | |
979 | case 'm': USE_BITS (OP_MASK_RM, OP_SH_RM); break; | |
980 | case 's': USE_BITS (OP_MASK_RS1, OP_SH_RS1); break; | |
981 | case 't': USE_BITS (OP_MASK_RS2, OP_SH_RS2); break; | |
0e35537d | 982 | case 'r': USE_BITS (OP_MASK_RS3, OP_SH_RS3); break; |
e23eba97 NC |
983 | case 'P': USE_BITS (OP_MASK_PRED, OP_SH_PRED); break; |
984 | case 'Q': USE_BITS (OP_MASK_SUCC, OP_SH_SUCC); break; | |
985 | case 'o': | |
1d65abb5 AW |
986 | case 'j': used_bits |= ENCODE_ITYPE_IMM (-1U); break; |
987 | case 'a': used_bits |= ENCODE_UJTYPE_IMM (-1U); break; | |
988 | case 'p': used_bits |= ENCODE_SBTYPE_IMM (-1U); break; | |
989 | case 'q': used_bits |= ENCODE_STYPE_IMM (-1U); break; | |
990 | case 'u': used_bits |= ENCODE_UTYPE_IMM (-1U); break; | |
e925c834 | 991 | case 'z': break; |
e23eba97 NC |
992 | case '[': break; |
993 | case ']': break; | |
994 | case '0': break; | |
f50fabe4 | 995 | case '1': break; |
0e35537d JW |
996 | case 'F': /* funct */ |
997 | switch (c = *p++) | |
998 | { | |
999 | case '7': USE_BITS (OP_MASK_FUNCT7, OP_SH_FUNCT7); break; | |
1000 | case '3': USE_BITS (OP_MASK_FUNCT3, OP_SH_FUNCT3); break; | |
1001 | case '2': USE_BITS (OP_MASK_FUNCT2, OP_SH_FUNCT2); break; | |
1002 | default: | |
1003 | as_bad (_("internal: bad RISC-V opcode" | |
1004 | " (unknown operand type `F%c'): %s %s"), | |
1005 | c, opc->name, opc->args); | |
1006 | return FALSE; | |
1007 | } | |
1008 | break; | |
1009 | case 'O': /* opcode */ | |
1010 | switch (c = *p++) | |
1011 | { | |
1012 | case '4': USE_BITS (OP_MASK_OP, OP_SH_OP); break; | |
1013 | case '2': USE_BITS (OP_MASK_OP2, OP_SH_OP2); break; | |
1014 | default: | |
1015 | as_bad (_("internal: bad RISC-V opcode" | |
1016 | " (unknown operand type `F%c'): %s %s"), | |
1017 | c, opc->name, opc->args); | |
1018 | return FALSE; | |
1019 | } | |
1020 | break; | |
e23eba97 NC |
1021 | default: |
1022 | as_bad (_("internal: bad RISC-V opcode " | |
1023 | "(unknown operand type `%c'): %s %s"), | |
1024 | c, opc->name, opc->args); | |
1025 | return FALSE; | |
1026 | } | |
1027 | #undef USE_BITS | |
1028 | if (used_bits != required_bits) | |
1029 | { | |
1030 | as_bad (_("internal: bad RISC-V opcode (bits 0x%lx undefined): %s %s"), | |
1031 | ~(unsigned long)(used_bits & required_bits), | |
1032 | opc->name, opc->args); | |
1033 | return FALSE; | |
1034 | } | |
1035 | return TRUE; | |
1036 | } | |
1037 | ||
1038 | struct percent_op_match | |
1039 | { | |
1040 | const char *str; | |
1041 | bfd_reloc_code_real_type reloc; | |
1042 | }; | |
1043 | ||
0e35537d JW |
1044 | /* Common hash table initialization function for |
1045 | instruction and .insn directive. */ | |
629310ab | 1046 | static htab_t |
0e35537d JW |
1047 | init_opcode_hash (const struct riscv_opcode *opcodes, |
1048 | bfd_boolean insn_directive_p) | |
e23eba97 NC |
1049 | { |
1050 | int i = 0; | |
0e35537d | 1051 | int length; |
629310ab | 1052 | htab_t hash = str_htab_create (); |
0e35537d | 1053 | while (opcodes[i].name) |
e23eba97 | 1054 | { |
0e35537d | 1055 | const char *name = opcodes[i].name; |
fe0e921f AM |
1056 | if (str_hash_insert (hash, name, &opcodes[i], 0) != NULL) |
1057 | as_fatal (_("duplicate %s"), name); | |
e23eba97 NC |
1058 | |
1059 | do | |
1060 | { | |
0e35537d | 1061 | if (opcodes[i].pinfo != INSN_MACRO) |
e23eba97 | 1062 | { |
0e35537d JW |
1063 | if (insn_directive_p) |
1064 | length = ((name[0] == 'c') ? 2 : 4); | |
1065 | else | |
1066 | length = 0; /* Let assembler determine the length. */ | |
1067 | if (!validate_riscv_insn (&opcodes[i], length)) | |
e23eba97 NC |
1068 | as_fatal (_("Broken assembler. No assembly attempted.")); |
1069 | } | |
0e35537d JW |
1070 | else |
1071 | gas_assert (!insn_directive_p); | |
e23eba97 NC |
1072 | ++i; |
1073 | } | |
0e35537d | 1074 | while (opcodes[i].name && !strcmp (opcodes[i].name, name)); |
e23eba97 NC |
1075 | } |
1076 | ||
0e35537d JW |
1077 | return hash; |
1078 | } | |
1079 | ||
1080 | /* This function is called once, at assembler startup time. It should set up | |
1081 | all the tables, etc. that the MD part of the assembler will need. */ | |
1082 | ||
1083 | void | |
1084 | md_begin (void) | |
1085 | { | |
1086 | unsigned long mach = xlen == 64 ? bfd_mach_riscv64 : bfd_mach_riscv32; | |
1087 | ||
1088 | if (! bfd_set_arch_mach (stdoutput, bfd_arch_riscv, mach)) | |
1089 | as_warn (_("Could not set architecture and machine")); | |
1090 | ||
1091 | op_hash = init_opcode_hash (riscv_opcodes, FALSE); | |
1092 | insn_type_hash = init_opcode_hash (riscv_insn_types, TRUE); | |
1093 | ||
629310ab | 1094 | reg_names_hash = str_htab_create (); |
e23eba97 NC |
1095 | hash_reg_names (RCLASS_GPR, riscv_gpr_names_numeric, NGPR); |
1096 | hash_reg_names (RCLASS_GPR, riscv_gpr_names_abi, NGPR); | |
1097 | hash_reg_names (RCLASS_FPR, riscv_fpr_names_numeric, NFPR); | |
1098 | hash_reg_names (RCLASS_FPR, riscv_fpr_names_abi, NFPR); | |
b9c04e5a JW |
1099 | /* Add "fp" as an alias for "s0". */ |
1100 | hash_reg_name (RCLASS_GPR, "fp", 8); | |
1101 | ||
bd0cf5a6 | 1102 | /* Create and insert CSR hash tables. */ |
629310ab | 1103 | csr_extra_hash = str_htab_create (); |
8f595e9b NC |
1104 | #define DECLARE_CSR(name, num, class, define_version, abort_version) \ |
1105 | riscv_init_csr_hash (#name, num, class, define_version, abort_version); | |
1106 | #define DECLARE_CSR_ALIAS(name, num, class, define_version, abort_version) \ | |
1107 | DECLARE_CSR(name, num, class, define_version, abort_version); | |
e23eba97 NC |
1108 | #include "opcode/riscv-opc.h" |
1109 | #undef DECLARE_CSR | |
1110 | ||
629310ab | 1111 | opcode_names_hash = str_htab_create (); |
bd0cf5a6 NC |
1112 | init_opcode_names_hash (); |
1113 | ||
e23eba97 NC |
1114 | /* Set the default alignment for the text section. */ |
1115 | record_alignment (text_section, riscv_opts.rvc ? 1 : 2); | |
1116 | } | |
1117 | ||
45f76423 AW |
1118 | static insn_t |
1119 | riscv_apply_const_reloc (bfd_reloc_code_real_type reloc_type, bfd_vma value) | |
1120 | { | |
1121 | switch (reloc_type) | |
1122 | { | |
1123 | case BFD_RELOC_32: | |
1124 | return value; | |
1125 | ||
1126 | case BFD_RELOC_RISCV_HI20: | |
1127 | return ENCODE_UTYPE_IMM (RISCV_CONST_HIGH_PART (value)); | |
1128 | ||
1129 | case BFD_RELOC_RISCV_LO12_S: | |
1130 | return ENCODE_STYPE_IMM (value); | |
1131 | ||
1132 | case BFD_RELOC_RISCV_LO12_I: | |
1133 | return ENCODE_ITYPE_IMM (value); | |
1134 | ||
1135 | default: | |
1136 | abort (); | |
1137 | } | |
1138 | } | |
1139 | ||
e23eba97 NC |
1140 | /* Output an instruction. IP is the instruction information. |
1141 | ADDRESS_EXPR is an operand of the instruction to be used with | |
1142 | RELOC_TYPE. */ | |
1143 | ||
1144 | static void | |
1145 | append_insn (struct riscv_cl_insn *ip, expressionS *address_expr, | |
1146 | bfd_reloc_code_real_type reloc_type) | |
1147 | { | |
1148 | dwarf2_emit_insn (0); | |
1149 | ||
1150 | if (reloc_type != BFD_RELOC_UNUSED) | |
1151 | { | |
1152 | reloc_howto_type *howto; | |
1153 | ||
1d65abb5 | 1154 | gas_assert (address_expr); |
e23eba97 NC |
1155 | if (reloc_type == BFD_RELOC_12_PCREL |
1156 | || reloc_type == BFD_RELOC_RISCV_JMP) | |
1157 | { | |
1158 | int j = reloc_type == BFD_RELOC_RISCV_JMP; | |
1159 | int best_case = riscv_insn_length (ip->insn_opcode); | |
1160 | unsigned worst_case = relaxed_branch_length (NULL, NULL, 0); | |
743f5cfc JW |
1161 | |
1162 | if (now_seg == absolute_section) | |
1163 | { | |
1164 | as_bad (_("relaxable branches not supported in absolute section")); | |
1165 | return; | |
1166 | } | |
1167 | ||
e23eba97 NC |
1168 | add_relaxed_insn (ip, worst_case, best_case, |
1169 | RELAX_BRANCH_ENCODE (j, best_case == 2, worst_case), | |
1170 | address_expr->X_add_symbol, | |
1171 | address_expr->X_add_number); | |
1172 | return; | |
1173 | } | |
45f76423 | 1174 | else |
e23eba97 | 1175 | { |
45f76423 AW |
1176 | howto = bfd_reloc_type_lookup (stdoutput, reloc_type); |
1177 | if (howto == NULL) | |
1178 | as_bad (_("Unsupported RISC-V relocation number %d"), reloc_type); | |
e23eba97 | 1179 | |
45f76423 AW |
1180 | ip->fixp = fix_new_exp (ip->frag, ip->where, |
1181 | bfd_get_reloc_size (howto), | |
1182 | address_expr, FALSE, reloc_type); | |
e23eba97 | 1183 | |
45f76423 | 1184 | ip->fixp->fx_tcbit = riscv_opts.relax; |
e23eba97 | 1185 | } |
e23eba97 NC |
1186 | } |
1187 | ||
e23eba97 NC |
1188 | add_fixed_insn (ip); |
1189 | install_insn (ip); | |
f77bb6c5 JW |
1190 | |
1191 | /* We need to start a new frag after any instruction that can be | |
1192 | optimized away or compressed by the linker during relaxation, to prevent | |
1193 | the assembler from computing static offsets across such an instruction. | |
1194 | This is necessary to get correct EH info. */ | |
b1b11e92 | 1195 | if (reloc_type == BFD_RELOC_RISCV_HI20 |
f77bb6c5 JW |
1196 | || reloc_type == BFD_RELOC_RISCV_PCREL_HI20 |
1197 | || reloc_type == BFD_RELOC_RISCV_TPREL_HI20 | |
1198 | || reloc_type == BFD_RELOC_RISCV_TPREL_ADD) | |
1199 | { | |
1200 | frag_wane (frag_now); | |
1201 | frag_new (0); | |
1202 | } | |
e23eba97 NC |
1203 | } |
1204 | ||
1205 | /* Build an instruction created by a macro expansion. This is passed | |
1206 | a pointer to the count of instructions created so far, an | |
1207 | expression, the name of the instruction to build, an operand format | |
1208 | string, and corresponding arguments. */ | |
1209 | ||
1210 | static void | |
1211 | macro_build (expressionS *ep, const char *name, const char *fmt, ...) | |
1212 | { | |
1213 | const struct riscv_opcode *mo; | |
1214 | struct riscv_cl_insn insn; | |
1215 | bfd_reloc_code_real_type r; | |
1216 | va_list args; | |
1217 | ||
1218 | va_start (args, fmt); | |
1219 | ||
1220 | r = BFD_RELOC_UNUSED; | |
629310ab | 1221 | mo = (struct riscv_opcode *) str_hash_find (op_hash, name); |
e23eba97 NC |
1222 | gas_assert (mo); |
1223 | ||
1224 | /* Find a non-RVC variant of the instruction. append_insn will compress | |
1225 | it if possible. */ | |
1226 | while (riscv_insn_length (mo->match) < 4) | |
1227 | mo++; | |
1228 | gas_assert (strcmp (name, mo->name) == 0); | |
1229 | ||
1230 | create_insn (&insn, mo); | |
1231 | for (;;) | |
1232 | { | |
1233 | switch (*fmt++) | |
1234 | { | |
1235 | case 'd': | |
1236 | INSERT_OPERAND (RD, insn, va_arg (args, int)); | |
1237 | continue; | |
1238 | ||
1239 | case 's': | |
1240 | INSERT_OPERAND (RS1, insn, va_arg (args, int)); | |
1241 | continue; | |
1242 | ||
1243 | case 't': | |
1244 | INSERT_OPERAND (RS2, insn, va_arg (args, int)); | |
1245 | continue; | |
1246 | ||
1247 | case '>': | |
1248 | INSERT_OPERAND (SHAMT, insn, va_arg (args, int)); | |
1249 | continue; | |
1250 | ||
1251 | case 'j': | |
1252 | case 'u': | |
1253 | case 'q': | |
1254 | gas_assert (ep != NULL); | |
1255 | r = va_arg (args, int); | |
1256 | continue; | |
1257 | ||
1258 | case '\0': | |
1259 | break; | |
1260 | case ',': | |
1261 | continue; | |
1262 | default: | |
1263 | as_fatal (_("internal error: invalid macro")); | |
1264 | } | |
1265 | break; | |
1266 | } | |
1267 | va_end (args); | |
1268 | gas_assert (r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); | |
1269 | ||
1270 | append_insn (&insn, ep, r); | |
1271 | } | |
1272 | ||
db3b6ecc KC |
1273 | /* Build an instruction created by a macro expansion. Like md_assemble but |
1274 | accept a printf-style format string and arguments. */ | |
1275 | ||
1276 | static void | |
1277 | md_assemblef (const char *format, ...) | |
1278 | { | |
1279 | char *buf = NULL; | |
1280 | va_list ap; | |
1281 | int r; | |
1282 | ||
1283 | va_start (ap, format); | |
1284 | ||
1285 | r = vasprintf (&buf, format, ap); | |
1286 | ||
1287 | if (r < 0) | |
1288 | as_fatal (_("internal error: vasprintf failed")); | |
1289 | ||
1290 | md_assemble (buf); | |
1291 | free(buf); | |
1292 | ||
1293 | va_end (ap); | |
1294 | } | |
1295 | ||
e23eba97 NC |
1296 | /* Sign-extend 32-bit mode constants that have bit 31 set and all higher bits |
1297 | unset. */ | |
1298 | static void | |
1299 | normalize_constant_expr (expressionS *ex) | |
1300 | { | |
1301 | if (xlen > 32) | |
1302 | return; | |
1303 | if ((ex->X_op == O_constant || ex->X_op == O_symbol) | |
1304 | && IS_ZEXT_32BIT_NUM (ex->X_add_number)) | |
1305 | ex->X_add_number = (((ex->X_add_number & 0xffffffff) ^ 0x80000000) | |
1306 | - 0x80000000); | |
1307 | } | |
1308 | ||
ca2fd32c JW |
1309 | /* Fail if an expression EX is not a constant. IP is the instruction using EX. |
1310 | MAYBE_CSR is true if the symbol may be an unrecognized CSR name. */ | |
e23eba97 NC |
1311 | |
1312 | static void | |
ca2fd32c JW |
1313 | check_absolute_expr (struct riscv_cl_insn *ip, expressionS *ex, |
1314 | bfd_boolean maybe_csr) | |
e23eba97 NC |
1315 | { |
1316 | if (ex->X_op == O_big) | |
1317 | as_bad (_("unsupported large constant")); | |
ca2fd32c JW |
1318 | else if (maybe_csr && ex->X_op == O_symbol) |
1319 | as_bad (_("unknown CSR `%s'"), | |
1320 | S_GET_NAME (ex->X_add_symbol)); | |
e23eba97 NC |
1321 | else if (ex->X_op != O_constant) |
1322 | as_bad (_("Instruction %s requires absolute expression"), | |
1323 | ip->insn_mo->name); | |
1324 | normalize_constant_expr (ex); | |
1325 | } | |
1326 | ||
1327 | static symbolS * | |
1328 | make_internal_label (void) | |
1329 | { | |
e01e1cee AM |
1330 | return (symbolS *) local_symbol_make (FAKE_LABEL_NAME, now_seg, frag_now, |
1331 | frag_now_fix ()); | |
e23eba97 NC |
1332 | } |
1333 | ||
1334 | /* Load an entry from the GOT. */ | |
1335 | static void | |
1336 | pcrel_access (int destreg, int tempreg, expressionS *ep, | |
1337 | const char *lo_insn, const char *lo_pattern, | |
1338 | bfd_reloc_code_real_type hi_reloc, | |
1339 | bfd_reloc_code_real_type lo_reloc) | |
1340 | { | |
1341 | expressionS ep2; | |
1342 | ep2.X_op = O_symbol; | |
1343 | ep2.X_add_symbol = make_internal_label (); | |
1344 | ep2.X_add_number = 0; | |
1345 | ||
1346 | macro_build (ep, "auipc", "d,u", tempreg, hi_reloc); | |
1347 | macro_build (&ep2, lo_insn, lo_pattern, destreg, tempreg, lo_reloc); | |
1348 | } | |
1349 | ||
1350 | static void | |
1351 | pcrel_load (int destreg, int tempreg, expressionS *ep, const char *lo_insn, | |
1352 | bfd_reloc_code_real_type hi_reloc, | |
1353 | bfd_reloc_code_real_type lo_reloc) | |
1354 | { | |
1355 | pcrel_access (destreg, tempreg, ep, lo_insn, "d,s,j", hi_reloc, lo_reloc); | |
1356 | } | |
1357 | ||
1358 | static void | |
1359 | pcrel_store (int srcreg, int tempreg, expressionS *ep, const char *lo_insn, | |
1360 | bfd_reloc_code_real_type hi_reloc, | |
1361 | bfd_reloc_code_real_type lo_reloc) | |
1362 | { | |
1363 | pcrel_access (srcreg, tempreg, ep, lo_insn, "t,s,q", hi_reloc, lo_reloc); | |
1364 | } | |
1365 | ||
1366 | /* PC-relative function call using AUIPC/JALR, relaxed to JAL. */ | |
1367 | static void | |
1368 | riscv_call (int destreg, int tempreg, expressionS *ep, | |
1369 | bfd_reloc_code_real_type reloc) | |
1370 | { | |
b1b11e92 AM |
1371 | /* Ensure the jalr is emitted to the same frag as the auipc. */ |
1372 | frag_grow (8); | |
e23eba97 NC |
1373 | macro_build (ep, "auipc", "d,u", tempreg, reloc); |
1374 | macro_build (NULL, "jalr", "d,s", destreg, tempreg); | |
b1b11e92 AM |
1375 | /* See comment at end of append_insn. */ |
1376 | frag_wane (frag_now); | |
1377 | frag_new (0); | |
e23eba97 NC |
1378 | } |
1379 | ||
1380 | /* Load an integer constant into a register. */ | |
1381 | ||
1382 | static void | |
1383 | load_const (int reg, expressionS *ep) | |
1384 | { | |
1385 | int shift = RISCV_IMM_BITS; | |
4f7cc141 | 1386 | bfd_vma upper_imm, sign = (bfd_vma) 1 << (RISCV_IMM_BITS - 1); |
e23eba97 | 1387 | expressionS upper = *ep, lower = *ep; |
4f7cc141 | 1388 | lower.X_add_number = ((ep->X_add_number & (sign + sign - 1)) ^ sign) - sign; |
e23eba97 NC |
1389 | upper.X_add_number -= lower.X_add_number; |
1390 | ||
1391 | if (ep->X_op != O_constant) | |
1392 | { | |
1393 | as_bad (_("unsupported large constant")); | |
1394 | return; | |
1395 | } | |
1396 | ||
1d65abb5 | 1397 | if (xlen > 32 && !IS_SEXT_32BIT_NUM (ep->X_add_number)) |
e23eba97 NC |
1398 | { |
1399 | /* Reduce to a signed 32-bit constant using SLLI and ADDI. */ | |
1400 | while (((upper.X_add_number >> shift) & 1) == 0) | |
1401 | shift++; | |
1402 | ||
1403 | upper.X_add_number = (int64_t) upper.X_add_number >> shift; | |
1d65abb5 | 1404 | load_const (reg, &upper); |
e23eba97 | 1405 | |
db3b6ecc | 1406 | md_assemblef ("slli x%d, x%d, 0x%x", reg, reg, shift); |
e23eba97 | 1407 | if (lower.X_add_number != 0) |
db3b6ecc KC |
1408 | md_assemblef ("addi x%d, x%d, %" BFD_VMA_FMT "d", reg, reg, |
1409 | lower.X_add_number); | |
e23eba97 NC |
1410 | } |
1411 | else | |
1412 | { | |
1413 | /* Simply emit LUI and/or ADDI to build a 32-bit signed constant. */ | |
1414 | int hi_reg = 0; | |
1415 | ||
1416 | if (upper.X_add_number != 0) | |
1417 | { | |
db3b6ecc KC |
1418 | /* Discard low part and zero-extend upper immediate. */ |
1419 | upper_imm = ((uint32_t)upper.X_add_number >> shift); | |
1420 | ||
1421 | md_assemblef ("lui x%d, 0x%" BFD_VMA_FMT "x", reg, upper_imm); | |
e23eba97 NC |
1422 | hi_reg = reg; |
1423 | } | |
1424 | ||
1425 | if (lower.X_add_number != 0 || hi_reg == 0) | |
db3b6ecc KC |
1426 | md_assemblef ("%s x%d, x%d, %" BFD_VMA_FMT "d", ADD32_INSN, reg, hi_reg, |
1427 | lower.X_add_number); | |
e23eba97 NC |
1428 | } |
1429 | } | |
1430 | ||
1431 | /* Expand RISC-V assembly macros into one or more instructions. */ | |
1432 | static void | |
1433 | macro (struct riscv_cl_insn *ip, expressionS *imm_expr, | |
1434 | bfd_reloc_code_real_type *imm_reloc) | |
1435 | { | |
1436 | int rd = (ip->insn_opcode >> OP_SH_RD) & OP_MASK_RD; | |
1437 | int rs1 = (ip->insn_opcode >> OP_SH_RS1) & OP_MASK_RS1; | |
1438 | int rs2 = (ip->insn_opcode >> OP_SH_RS2) & OP_MASK_RS2; | |
1439 | int mask = ip->insn_mo->mask; | |
1440 | ||
1441 | switch (mask) | |
1442 | { | |
1443 | case M_LI: | |
1444 | load_const (rd, imm_expr); | |
1445 | break; | |
1446 | ||
1447 | case M_LA: | |
1448 | case M_LLA: | |
1449 | /* Load the address of a symbol into a register. */ | |
1450 | if (!IS_SEXT_32BIT_NUM (imm_expr->X_add_number)) | |
1451 | as_bad (_("offset too large")); | |
1452 | ||
1453 | if (imm_expr->X_op == O_constant) | |
1454 | load_const (rd, imm_expr); | |
1455 | else if (riscv_opts.pic && mask == M_LA) /* Global PIC symbol */ | |
1456 | pcrel_load (rd, rd, imm_expr, LOAD_ADDRESS_INSN, | |
1457 | BFD_RELOC_RISCV_GOT_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1458 | else /* Local PIC symbol, or any non-PIC symbol */ | |
1459 | pcrel_load (rd, rd, imm_expr, "addi", | |
1460 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1461 | break; | |
1462 | ||
1463 | case M_LA_TLS_GD: | |
1464 | pcrel_load (rd, rd, imm_expr, "addi", | |
1465 | BFD_RELOC_RISCV_TLS_GD_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1466 | break; | |
1467 | ||
1468 | case M_LA_TLS_IE: | |
1469 | pcrel_load (rd, rd, imm_expr, LOAD_ADDRESS_INSN, | |
1470 | BFD_RELOC_RISCV_TLS_GOT_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1471 | break; | |
1472 | ||
1473 | case M_LB: | |
1474 | pcrel_load (rd, rd, imm_expr, "lb", | |
1475 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1476 | break; | |
1477 | ||
1478 | case M_LBU: | |
1479 | pcrel_load (rd, rd, imm_expr, "lbu", | |
1480 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1481 | break; | |
1482 | ||
1483 | case M_LH: | |
1484 | pcrel_load (rd, rd, imm_expr, "lh", | |
1485 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1486 | break; | |
1487 | ||
1488 | case M_LHU: | |
1489 | pcrel_load (rd, rd, imm_expr, "lhu", | |
1490 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1491 | break; | |
1492 | ||
1493 | case M_LW: | |
1494 | pcrel_load (rd, rd, imm_expr, "lw", | |
1495 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1496 | break; | |
1497 | ||
1498 | case M_LWU: | |
1499 | pcrel_load (rd, rd, imm_expr, "lwu", | |
1500 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1501 | break; | |
1502 | ||
1503 | case M_LD: | |
1504 | pcrel_load (rd, rd, imm_expr, "ld", | |
1505 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1506 | break; | |
1507 | ||
1508 | case M_FLW: | |
1509 | pcrel_load (rd, rs1, imm_expr, "flw", | |
1510 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1511 | break; | |
1512 | ||
1513 | case M_FLD: | |
1514 | pcrel_load (rd, rs1, imm_expr, "fld", | |
1515 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_I); | |
1516 | break; | |
1517 | ||
1518 | case M_SB: | |
1519 | pcrel_store (rs2, rs1, imm_expr, "sb", | |
1520 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1521 | break; | |
1522 | ||
1523 | case M_SH: | |
1524 | pcrel_store (rs2, rs1, imm_expr, "sh", | |
1525 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1526 | break; | |
1527 | ||
1528 | case M_SW: | |
1529 | pcrel_store (rs2, rs1, imm_expr, "sw", | |
1530 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1531 | break; | |
1532 | ||
1533 | case M_SD: | |
1534 | pcrel_store (rs2, rs1, imm_expr, "sd", | |
1535 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1536 | break; | |
1537 | ||
1538 | case M_FSW: | |
1539 | pcrel_store (rs2, rs1, imm_expr, "fsw", | |
1540 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1541 | break; | |
1542 | ||
1543 | case M_FSD: | |
1544 | pcrel_store (rs2, rs1, imm_expr, "fsd", | |
1545 | BFD_RELOC_RISCV_PCREL_HI20, BFD_RELOC_RISCV_PCREL_LO12_S); | |
1546 | break; | |
1547 | ||
1548 | case M_CALL: | |
1549 | riscv_call (rd, rs1, imm_expr, *imm_reloc); | |
1550 | break; | |
1551 | ||
1552 | default: | |
1553 | as_bad (_("Macro %s not implemented"), ip->insn_mo->name); | |
1554 | break; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | static const struct percent_op_match percent_op_utype[] = | |
1559 | { | |
1560 | {"%tprel_hi", BFD_RELOC_RISCV_TPREL_HI20}, | |
1561 | {"%pcrel_hi", BFD_RELOC_RISCV_PCREL_HI20}, | |
dee35d02 | 1562 | {"%got_pcrel_hi", BFD_RELOC_RISCV_GOT_HI20}, |
e23eba97 NC |
1563 | {"%tls_ie_pcrel_hi", BFD_RELOC_RISCV_TLS_GOT_HI20}, |
1564 | {"%tls_gd_pcrel_hi", BFD_RELOC_RISCV_TLS_GD_HI20}, | |
1565 | {"%hi", BFD_RELOC_RISCV_HI20}, | |
1566 | {0, 0} | |
1567 | }; | |
1568 | ||
1569 | static const struct percent_op_match percent_op_itype[] = | |
1570 | { | |
1571 | {"%lo", BFD_RELOC_RISCV_LO12_I}, | |
1572 | {"%tprel_lo", BFD_RELOC_RISCV_TPREL_LO12_I}, | |
1573 | {"%pcrel_lo", BFD_RELOC_RISCV_PCREL_LO12_I}, | |
1574 | {0, 0} | |
1575 | }; | |
1576 | ||
1577 | static const struct percent_op_match percent_op_stype[] = | |
1578 | { | |
1579 | {"%lo", BFD_RELOC_RISCV_LO12_S}, | |
1580 | {"%tprel_lo", BFD_RELOC_RISCV_TPREL_LO12_S}, | |
1581 | {"%pcrel_lo", BFD_RELOC_RISCV_PCREL_LO12_S}, | |
1582 | {0, 0} | |
1583 | }; | |
1584 | ||
1585 | static const struct percent_op_match percent_op_rtype[] = | |
1586 | { | |
1587 | {"%tprel_add", BFD_RELOC_RISCV_TPREL_ADD}, | |
1588 | {0, 0} | |
1589 | }; | |
1590 | ||
f50fabe4 JW |
1591 | static const struct percent_op_match percent_op_null[] = |
1592 | { | |
1593 | {0, 0} | |
1594 | }; | |
1595 | ||
e23eba97 NC |
1596 | /* Return true if *STR points to a relocation operator. When returning true, |
1597 | move *STR over the operator and store its relocation code in *RELOC. | |
1598 | Leave both *STR and *RELOC alone when returning false. */ | |
1599 | ||
1600 | static bfd_boolean | |
1601 | parse_relocation (char **str, bfd_reloc_code_real_type *reloc, | |
1602 | const struct percent_op_match *percent_op) | |
1603 | { | |
1604 | for ( ; percent_op->str; percent_op++) | |
1605 | if (strncasecmp (*str, percent_op->str, strlen (percent_op->str)) == 0) | |
1606 | { | |
1607 | int len = strlen (percent_op->str); | |
1608 | ||
1609 | if (!ISSPACE ((*str)[len]) && (*str)[len] != '(') | |
1610 | continue; | |
1611 | ||
1612 | *str += strlen (percent_op->str); | |
1613 | *reloc = percent_op->reloc; | |
1614 | ||
1615 | /* Check whether the output BFD supports this relocation. | |
1616 | If not, issue an error and fall back on something safe. */ | |
45f76423 AW |
1617 | if (*reloc != BFD_RELOC_UNUSED |
1618 | && !bfd_reloc_type_lookup (stdoutput, *reloc)) | |
e23eba97 NC |
1619 | { |
1620 | as_bad ("relocation %s isn't supported by the current ABI", | |
1621 | percent_op->str); | |
1622 | *reloc = BFD_RELOC_UNUSED; | |
1623 | } | |
1624 | return TRUE; | |
1625 | } | |
1626 | return FALSE; | |
1627 | } | |
1628 | ||
1629 | static void | |
1630 | my_getExpression (expressionS *ep, char *str) | |
1631 | { | |
1632 | char *save_in; | |
1633 | ||
1634 | save_in = input_line_pointer; | |
1635 | input_line_pointer = str; | |
1636 | expression (ep); | |
1637 | expr_end = input_line_pointer; | |
1638 | input_line_pointer = save_in; | |
1639 | } | |
1640 | ||
1641 | /* Parse string STR as a 16-bit relocatable operand. Store the | |
1642 | expression in *EP and the relocation, if any, in RELOC. | |
1643 | Return the number of relocation operators used (0 or 1). | |
1644 | ||
1645 | On exit, EXPR_END points to the first character after the expression. */ | |
1646 | ||
1647 | static size_t | |
1648 | my_getSmallExpression (expressionS *ep, bfd_reloc_code_real_type *reloc, | |
1649 | char *str, const struct percent_op_match *percent_op) | |
1650 | { | |
1651 | size_t reloc_index; | |
1652 | unsigned crux_depth, str_depth, regno; | |
1653 | char *crux; | |
1654 | ||
8970c022 JW |
1655 | /* First, check for integer registers. No callers can accept a reg, but |
1656 | we need to avoid accidentally creating a useless undefined symbol below, | |
1657 | if this is an instruction pattern that can't match. A glibc build fails | |
1658 | if this is removed. */ | |
e23eba97 NC |
1659 | if (reg_lookup (&str, RCLASS_GPR, ®no)) |
1660 | { | |
1661 | ep->X_op = O_register; | |
1662 | ep->X_add_number = regno; | |
8970c022 | 1663 | expr_end = str; |
e23eba97 NC |
1664 | return 0; |
1665 | } | |
1666 | ||
1667 | /* Search for the start of the main expression. | |
1668 | End the loop with CRUX pointing to the start | |
1669 | of the main expression and with CRUX_DEPTH containing the number | |
1670 | of open brackets at that point. */ | |
1671 | reloc_index = -1; | |
1672 | str_depth = 0; | |
1673 | do | |
1674 | { | |
1675 | reloc_index++; | |
1676 | crux = str; | |
1677 | crux_depth = str_depth; | |
1678 | ||
1679 | /* Skip over whitespace and brackets, keeping count of the number | |
1680 | of brackets. */ | |
1681 | while (*str == ' ' || *str == '\t' || *str == '(') | |
1682 | if (*str++ == '(') | |
1683 | str_depth++; | |
1684 | } | |
1685 | while (*str == '%' | |
1686 | && reloc_index < 1 | |
1687 | && parse_relocation (&str, reloc, percent_op)); | |
1688 | ||
1689 | my_getExpression (ep, crux); | |
1690 | str = expr_end; | |
1691 | ||
1692 | /* Match every open bracket. */ | |
1693 | while (crux_depth > 0 && (*str == ')' || *str == ' ' || *str == '\t')) | |
1694 | if (*str++ == ')') | |
1695 | crux_depth--; | |
1696 | ||
1697 | if (crux_depth > 0) | |
1698 | as_bad ("unclosed '('"); | |
1699 | ||
1700 | expr_end = str; | |
1701 | ||
1702 | return reloc_index; | |
1703 | } | |
1704 | ||
0e35537d JW |
1705 | /* Parse opcode name, could be an mnemonics or number. */ |
1706 | static size_t | |
1707 | my_getOpcodeExpression (expressionS *ep, bfd_reloc_code_real_type *reloc, | |
1708 | char *str, const struct percent_op_match *percent_op) | |
1709 | { | |
1710 | const struct opcode_name_t *o = opcode_name_lookup (&str); | |
1711 | ||
1712 | if (o != NULL) | |
1713 | { | |
1714 | ep->X_op = O_constant; | |
1715 | ep->X_add_number = o->val; | |
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | return my_getSmallExpression (ep, reloc, str, percent_op); | |
1720 | } | |
1721 | ||
f0531ed6 JW |
1722 | /* Detect and handle implicitly zero load-store offsets. For example, |
1723 | "lw t0, (t1)" is shorthand for "lw t0, 0(t1)". Return TRUE iff such | |
1724 | an implicit offset was detected. */ | |
1725 | ||
1726 | static bfd_boolean | |
89424b1d | 1727 | riscv_handle_implicit_zero_offset (expressionS *ep, const char *s) |
f0531ed6 JW |
1728 | { |
1729 | /* Check whether there is only a single bracketed expression left. | |
1730 | If so, it must be the base register and the constant must be zero. */ | |
1731 | if (*s == '(' && strchr (s + 1, '(') == 0) | |
1732 | { | |
89424b1d MR |
1733 | ep->X_op = O_constant; |
1734 | ep->X_add_number = 0; | |
f0531ed6 JW |
1735 | return TRUE; |
1736 | } | |
1737 | ||
1738 | return FALSE; | |
1739 | } | |
1740 | ||
54b2aec1 NC |
1741 | /* All RISC-V CSR instructions belong to one of these classes. */ |
1742 | ||
1743 | enum csr_insn_type | |
1744 | { | |
1745 | INSN_NOT_CSR, | |
1746 | INSN_CSRRW, | |
1747 | INSN_CSRRS, | |
1748 | INSN_CSRRC | |
1749 | }; | |
1750 | ||
1751 | /* Return which CSR instruction is checking. */ | |
1752 | ||
1753 | static enum csr_insn_type | |
1754 | riscv_csr_insn_type (insn_t insn) | |
1755 | { | |
1756 | if (((insn ^ MATCH_CSRRW) & MASK_CSRRW) == 0 | |
1757 | || ((insn ^ MATCH_CSRRWI) & MASK_CSRRWI) == 0) | |
1758 | return INSN_CSRRW; | |
1759 | else if (((insn ^ MATCH_CSRRS) & MASK_CSRRS) == 0 | |
1760 | || ((insn ^ MATCH_CSRRSI) & MASK_CSRRSI) == 0) | |
1761 | return INSN_CSRRS; | |
1762 | else if (((insn ^ MATCH_CSRRC) & MASK_CSRRC) == 0 | |
1763 | || ((insn ^ MATCH_CSRRCI) & MASK_CSRRCI) == 0) | |
1764 | return INSN_CSRRC; | |
1765 | else | |
1766 | return INSN_NOT_CSR; | |
1767 | } | |
1768 | ||
1769 | /* CSRRW and CSRRWI always write CSR. CSRRS, CSRRC, CSRRSI and CSRRCI write | |
1770 | CSR when RS1 isn't zero. The CSR is read only if the [11:10] bits of | |
1771 | CSR address is 0x3. */ | |
1772 | ||
1773 | static bfd_boolean | |
1774 | riscv_csr_read_only_check (insn_t insn) | |
1775 | { | |
1776 | int csr = (insn & (OP_MASK_CSR << OP_SH_CSR)) >> OP_SH_CSR; | |
1777 | int rs1 = (insn & (OP_MASK_RS1 << OP_SH_RS1)) >> OP_SH_RS1; | |
1778 | int readonly = (((csr & (0x3 << 10)) >> 10) == 0x3); | |
1779 | enum csr_insn_type csr_insn = riscv_csr_insn_type (insn); | |
1780 | ||
1781 | if (readonly | |
1782 | && (((csr_insn == INSN_CSRRS | |
1783 | || csr_insn == INSN_CSRRC) | |
1784 | && rs1 != 0) | |
1785 | || csr_insn == INSN_CSRRW)) | |
1786 | return FALSE; | |
1787 | ||
1788 | return TRUE; | |
1789 | } | |
1790 | ||
1a79004f NC |
1791 | /* Return True if it is a privileged instruction. Otherwise, return FALSE. |
1792 | ||
1793 | uret is actually a N-ext instruction. So it is better to regard it as | |
1794 | an user instruction rather than the priv instruction. | |
1795 | ||
1796 | hret is used to return from traps in H-mode. H-mode is removed since | |
1797 | the v1.10 priv spec, but probably be added in the new hypervisor spec. | |
1798 | Therefore, hret should be controlled by the hypervisor spec rather than | |
1799 | priv spec in the future. | |
1800 | ||
1801 | dret is defined in the debug spec, so it should be checked in the future, | |
1802 | too. */ | |
1803 | ||
1804 | static bfd_boolean | |
1805 | riscv_is_priv_insn (insn_t insn) | |
1806 | { | |
1807 | return (((insn ^ MATCH_SRET) & MASK_SRET) == 0 | |
1808 | || ((insn ^ MATCH_MRET) & MASK_MRET) == 0 | |
1809 | || ((insn ^ MATCH_SFENCE_VMA) & MASK_SFENCE_VMA) == 0 | |
1810 | || ((insn ^ MATCH_WFI) & MASK_WFI) == 0 | |
1811 | /* The sfence.vm is dropped in the v1.10 priv specs, but we still need to | |
1812 | check it here to keep the compatible. Maybe we should issue warning | |
1813 | if sfence.vm is used, but the priv spec newer than v1.10 is chosen. | |
1814 | We already have a similar check for CSR, but not yet for instructions. | |
1815 | It would be good if we could check the spec versions both for CSR and | |
1816 | instructions, but not here. */ | |
1817 | || ((insn ^ MATCH_SFENCE_VM) & MASK_SFENCE_VM) == 0); | |
1818 | } | |
1819 | ||
e23eba97 NC |
1820 | /* This routine assembles an instruction into its binary format. As a |
1821 | side effect, it sets the global variable imm_reloc to the type of | |
1822 | relocation to do if one of the operands is an address expression. */ | |
1823 | ||
1824 | static const char * | |
1825 | riscv_ip (char *str, struct riscv_cl_insn *ip, expressionS *imm_expr, | |
629310ab | 1826 | bfd_reloc_code_real_type *imm_reloc, htab_t hash) |
e23eba97 NC |
1827 | { |
1828 | char *s; | |
1829 | const char *args; | |
1830 | char c = 0; | |
1831 | struct riscv_opcode *insn; | |
1832 | char *argsStart; | |
1833 | unsigned int regno; | |
1834 | char save_c = 0; | |
1835 | int argnum; | |
1836 | const struct percent_op_match *p; | |
1837 | const char *error = "unrecognized opcode"; | |
54b2aec1 NC |
1838 | /* Indicate we are assembling instruction with CSR. */ |
1839 | bfd_boolean insn_with_csr = FALSE; | |
e23eba97 NC |
1840 | |
1841 | /* Parse the name of the instruction. Terminate the string if whitespace | |
629310ab | 1842 | is found so that str_hash_find only sees the name part of the string. */ |
e23eba97 NC |
1843 | for (s = str; *s != '\0'; ++s) |
1844 | if (ISSPACE (*s)) | |
1845 | { | |
1846 | save_c = *s; | |
1847 | *s++ = '\0'; | |
1848 | break; | |
1849 | } | |
1850 | ||
629310ab | 1851 | insn = (struct riscv_opcode *) str_hash_find (hash, str); |
e23eba97 NC |
1852 | |
1853 | argsStart = s; | |
1854 | for ( ; insn && insn->name && strcmp (insn->name, str) == 0; insn++) | |
1855 | { | |
1080bf78 JW |
1856 | if ((insn->xlen_requirement != 0) && (xlen != insn->xlen_requirement)) |
1857 | continue; | |
1858 | ||
7e9ad3a3 | 1859 | if (!riscv_multi_subset_supports (insn->insn_class)) |
e23eba97 NC |
1860 | continue; |
1861 | ||
1862 | create_insn (ip, insn); | |
1863 | argnum = 1; | |
1864 | ||
1865 | imm_expr->X_op = O_absent; | |
1866 | *imm_reloc = BFD_RELOC_UNUSED; | |
1867 | p = percent_op_itype; | |
1868 | ||
1869 | for (args = insn->args;; ++args) | |
1870 | { | |
1871 | s += strspn (s, " \t"); | |
1872 | switch (*args) | |
1873 | { | |
1874 | case '\0': /* End of args. */ | |
1875 | if (insn->pinfo != INSN_MACRO) | |
1876 | { | |
1877 | if (!insn->match_func (insn, ip->insn_opcode)) | |
1878 | break; | |
0e35537d JW |
1879 | |
1880 | /* For .insn, insn->match and insn->mask are 0. */ | |
1881 | if (riscv_insn_length ((insn->match == 0 && insn->mask == 0) | |
1882 | ? ip->insn_opcode | |
1883 | : insn->match) == 2 | |
1884 | && !riscv_opts.rvc) | |
e23eba97 | 1885 | break; |
54b2aec1 | 1886 | |
1a79004f NC |
1887 | if (riscv_is_priv_insn (ip->insn_opcode)) |
1888 | explicit_priv_attr = TRUE; | |
1889 | ||
54b2aec1 NC |
1890 | /* Check if we write a read-only CSR by the CSR |
1891 | instruction. */ | |
1892 | if (insn_with_csr | |
1893 | && riscv_opts.csr_check | |
1894 | && !riscv_csr_read_only_check (ip->insn_opcode)) | |
1895 | { | |
1896 | /* Restore the character in advance, since we want to | |
1897 | report the detailed warning message here. */ | |
1898 | if (save_c) | |
1899 | *(argsStart - 1) = save_c; | |
1900 | as_warn (_("Read-only CSR is written `%s'"), str); | |
1901 | insn_with_csr = FALSE; | |
1902 | } | |
e23eba97 NC |
1903 | } |
1904 | if (*s != '\0') | |
1905 | break; | |
1906 | /* Successful assembly. */ | |
1907 | error = NULL; | |
54b2aec1 | 1908 | insn_with_csr = FALSE; |
e23eba97 NC |
1909 | goto out; |
1910 | ||
1911 | case 'C': /* RVC */ | |
1912 | switch (*++args) | |
1913 | { | |
1914 | case 's': /* RS1 x8-x15 */ | |
1915 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1916 | || !(regno >= 8 && regno <= 15)) | |
1917 | break; | |
1918 | INSERT_OPERAND (CRS1S, *ip, regno % 8); | |
1919 | continue; | |
1920 | case 'w': /* RS1 x8-x15, constrained to equal RD x8-x15. */ | |
1921 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1922 | || EXTRACT_OPERAND (CRS1S, ip->insn_opcode) + 8 != regno) | |
1923 | break; | |
1924 | continue; | |
1925 | case 't': /* RS2 x8-x15 */ | |
1926 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1927 | || !(regno >= 8 && regno <= 15)) | |
1928 | break; | |
1929 | INSERT_OPERAND (CRS2S, *ip, regno % 8); | |
1930 | continue; | |
1931 | case 'x': /* RS2 x8-x15, constrained to equal RD x8-x15. */ | |
1932 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1933 | || EXTRACT_OPERAND (CRS2S, ip->insn_opcode) + 8 != regno) | |
1934 | break; | |
1935 | continue; | |
1936 | case 'U': /* RS1, constrained to equal RD. */ | |
1937 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1938 | || EXTRACT_OPERAND (RD, ip->insn_opcode) != regno) | |
1939 | break; | |
1940 | continue; | |
1941 | case 'V': /* RS2 */ | |
1942 | if (!reg_lookup (&s, RCLASS_GPR, ®no)) | |
1943 | break; | |
1944 | INSERT_OPERAND (CRS2, *ip, regno); | |
1945 | continue; | |
1946 | case 'c': /* RS1, constrained to equal sp. */ | |
1947 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1948 | || regno != X_SP) | |
1949 | break; | |
1950 | continue; | |
ca0bc150 JW |
1951 | case 'z': /* RS2, contrained to equal x0. */ |
1952 | if (!reg_lookup (&s, RCLASS_GPR, ®no) | |
1953 | || regno != 0) | |
1954 | break; | |
1955 | continue; | |
e23eba97 NC |
1956 | case '>': |
1957 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
1958 | || imm_expr->X_op != O_constant | |
1959 | || imm_expr->X_add_number <= 0 | |
1960 | || imm_expr->X_add_number >= 64) | |
1961 | break; | |
1962 | ip->insn_opcode |= ENCODE_RVC_IMM (imm_expr->X_add_number); | |
dc1e8a47 | 1963 | rvc_imm_done: |
e23eba97 NC |
1964 | s = expr_end; |
1965 | imm_expr->X_op = O_absent; | |
1966 | continue; | |
1967 | case '<': | |
1968 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
1969 | || imm_expr->X_op != O_constant | |
e23eba97 | 1970 | || imm_expr->X_add_number <= 0 |
169ec512 AM |
1971 | || imm_expr->X_add_number >= 32 |
1972 | || !VALID_RVC_IMM ((valueT) imm_expr->X_add_number)) | |
e23eba97 NC |
1973 | break; |
1974 | ip->insn_opcode |= ENCODE_RVC_IMM (imm_expr->X_add_number); | |
1975 | goto rvc_imm_done; | |
0e35537d JW |
1976 | case '8': |
1977 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
1978 | || imm_expr->X_op != O_constant | |
0e35537d | 1979 | || imm_expr->X_add_number < 0 |
169ec512 AM |
1980 | || imm_expr->X_add_number >= 256 |
1981 | || !VALID_RVC_UIMM8 ((valueT) imm_expr->X_add_number)) | |
0e35537d JW |
1982 | break; |
1983 | ip->insn_opcode |= ENCODE_RVC_UIMM8 (imm_expr->X_add_number); | |
1984 | goto rvc_imm_done; | |
e23eba97 NC |
1985 | case 'i': |
1986 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
1987 | || imm_expr->X_op != O_constant | |
1988 | || imm_expr->X_add_number == 0 | |
169ec512 | 1989 | || !VALID_RVC_SIMM3 ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
1990 | break; |
1991 | ip->insn_opcode |= ENCODE_RVC_SIMM3 (imm_expr->X_add_number); | |
1992 | goto rvc_imm_done; | |
1993 | case 'j': | |
1994 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
1995 | || imm_expr->X_op != O_constant | |
1996 | || imm_expr->X_add_number == 0 | |
169ec512 | 1997 | || !VALID_RVC_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
1998 | break; |
1999 | ip->insn_opcode |= ENCODE_RVC_IMM (imm_expr->X_add_number); | |
2000 | goto rvc_imm_done; | |
2001 | case 'k': | |
f0531ed6 JW |
2002 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2003 | continue; | |
e23eba97 NC |
2004 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2005 | || imm_expr->X_op != O_constant | |
169ec512 | 2006 | || !VALID_RVC_LW_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2007 | break; |
2008 | ip->insn_opcode |= ENCODE_RVC_LW_IMM (imm_expr->X_add_number); | |
2009 | goto rvc_imm_done; | |
2010 | case 'l': | |
f0531ed6 JW |
2011 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2012 | continue; | |
e23eba97 NC |
2013 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2014 | || imm_expr->X_op != O_constant | |
169ec512 | 2015 | || !VALID_RVC_LD_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2016 | break; |
2017 | ip->insn_opcode |= ENCODE_RVC_LD_IMM (imm_expr->X_add_number); | |
2018 | goto rvc_imm_done; | |
2019 | case 'm': | |
f0531ed6 JW |
2020 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2021 | continue; | |
e23eba97 NC |
2022 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2023 | || imm_expr->X_op != O_constant | |
169ec512 | 2024 | || !VALID_RVC_LWSP_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2025 | break; |
2026 | ip->insn_opcode |= | |
2027 | ENCODE_RVC_LWSP_IMM (imm_expr->X_add_number); | |
2028 | goto rvc_imm_done; | |
2029 | case 'n': | |
f0531ed6 JW |
2030 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2031 | continue; | |
e23eba97 NC |
2032 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2033 | || imm_expr->X_op != O_constant | |
169ec512 | 2034 | || !VALID_RVC_LDSP_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2035 | break; |
2036 | ip->insn_opcode |= | |
2037 | ENCODE_RVC_LDSP_IMM (imm_expr->X_add_number); | |
2038 | goto rvc_imm_done; | |
b416fe87 KC |
2039 | case 'o': |
2040 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2041 | || imm_expr->X_op != O_constant | |
21a186f2 JW |
2042 | /* C.addiw, c.li, and c.andi allow zero immediate. |
2043 | C.addi allows zero immediate as hint. Otherwise this | |
2044 | is same as 'j'. */ | |
169ec512 | 2045 | || !VALID_RVC_IMM ((valueT) imm_expr->X_add_number)) |
b416fe87 KC |
2046 | break; |
2047 | ip->insn_opcode |= ENCODE_RVC_IMM (imm_expr->X_add_number); | |
2048 | goto rvc_imm_done; | |
e23eba97 NC |
2049 | case 'K': |
2050 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2051 | || imm_expr->X_op != O_constant | |
169ec512 AM |
2052 | || imm_expr->X_add_number == 0 |
2053 | || !VALID_RVC_ADDI4SPN_IMM ((valueT) imm_expr->X_add_number)) | |
e23eba97 NC |
2054 | break; |
2055 | ip->insn_opcode |= | |
2056 | ENCODE_RVC_ADDI4SPN_IMM (imm_expr->X_add_number); | |
2057 | goto rvc_imm_done; | |
2058 | case 'L': | |
2059 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2060 | || imm_expr->X_op != O_constant | |
169ec512 AM |
2061 | || imm_expr->X_add_number == 0 |
2062 | || !VALID_RVC_ADDI16SP_IMM ((valueT) imm_expr->X_add_number)) | |
e23eba97 NC |
2063 | break; |
2064 | ip->insn_opcode |= | |
2065 | ENCODE_RVC_ADDI16SP_IMM (imm_expr->X_add_number); | |
2066 | goto rvc_imm_done; | |
2067 | case 'M': | |
f0531ed6 JW |
2068 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2069 | continue; | |
e23eba97 NC |
2070 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2071 | || imm_expr->X_op != O_constant | |
169ec512 | 2072 | || !VALID_RVC_SWSP_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2073 | break; |
2074 | ip->insn_opcode |= | |
2075 | ENCODE_RVC_SWSP_IMM (imm_expr->X_add_number); | |
2076 | goto rvc_imm_done; | |
2077 | case 'N': | |
f0531ed6 JW |
2078 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
2079 | continue; | |
e23eba97 NC |
2080 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) |
2081 | || imm_expr->X_op != O_constant | |
169ec512 | 2082 | || !VALID_RVC_SDSP_IMM ((valueT) imm_expr->X_add_number)) |
e23eba97 NC |
2083 | break; |
2084 | ip->insn_opcode |= | |
2085 | ENCODE_RVC_SDSP_IMM (imm_expr->X_add_number); | |
2086 | goto rvc_imm_done; | |
2087 | case 'u': | |
2088 | p = percent_op_utype; | |
2089 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p)) | |
2090 | break; | |
dc1e8a47 | 2091 | rvc_lui: |
e23eba97 NC |
2092 | if (imm_expr->X_op != O_constant |
2093 | || imm_expr->X_add_number <= 0 | |
2094 | || imm_expr->X_add_number >= RISCV_BIGIMM_REACH | |
2095 | || (imm_expr->X_add_number >= RISCV_RVC_IMM_REACH / 2 | |
2096 | && (imm_expr->X_add_number < | |
2097 | RISCV_BIGIMM_REACH - RISCV_RVC_IMM_REACH / 2))) | |
2098 | break; | |
2099 | ip->insn_opcode |= ENCODE_RVC_IMM (imm_expr->X_add_number); | |
2100 | goto rvc_imm_done; | |
2101 | case 'v': | |
2102 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2103 | || (imm_expr->X_add_number & (RISCV_IMM_REACH - 1)) | |
2104 | || ((int32_t)imm_expr->X_add_number | |
2105 | != imm_expr->X_add_number)) | |
2106 | break; | |
2107 | imm_expr->X_add_number = | |
2108 | ((uint32_t) imm_expr->X_add_number) >> RISCV_IMM_BITS; | |
2109 | goto rvc_lui; | |
2110 | case 'p': | |
2111 | goto branch; | |
2112 | case 'a': | |
2113 | goto jump; | |
0e35537d JW |
2114 | case 'S': /* Floating-point RS1 x8-x15. */ |
2115 | if (!reg_lookup (&s, RCLASS_FPR, ®no) | |
2116 | || !(regno >= 8 && regno <= 15)) | |
2117 | break; | |
2118 | INSERT_OPERAND (CRS1S, *ip, regno % 8); | |
2119 | continue; | |
e23eba97 NC |
2120 | case 'D': /* Floating-point RS2 x8-x15. */ |
2121 | if (!reg_lookup (&s, RCLASS_FPR, ®no) | |
2122 | || !(regno >= 8 && regno <= 15)) | |
2123 | break; | |
2124 | INSERT_OPERAND (CRS2S, *ip, regno % 8); | |
2125 | continue; | |
2126 | case 'T': /* Floating-point RS2. */ | |
2127 | if (!reg_lookup (&s, RCLASS_FPR, ®no)) | |
2128 | break; | |
2129 | INSERT_OPERAND (CRS2, *ip, regno); | |
2130 | continue; | |
0e35537d JW |
2131 | case 'F': |
2132 | switch (*++args) | |
2133 | { | |
4765cd61 JW |
2134 | case '6': |
2135 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2136 | || imm_expr->X_op != O_constant | |
2137 | || imm_expr->X_add_number < 0 | |
2138 | || imm_expr->X_add_number >= 64) | |
2139 | { | |
2140 | as_bad (_("bad value for funct6 field, " | |
2141 | "value must be 0...64")); | |
2142 | break; | |
2143 | } | |
2144 | ||
2145 | INSERT_OPERAND (CFUNCT6, *ip, imm_expr->X_add_number); | |
2146 | imm_expr->X_op = O_absent; | |
2147 | s = expr_end; | |
2148 | continue; | |
0e35537d JW |
2149 | case '4': |
2150 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2151 | || imm_expr->X_op != O_constant | |
2152 | || imm_expr->X_add_number < 0 | |
2153 | || imm_expr->X_add_number >= 16) | |
2154 | { | |
2155 | as_bad (_("bad value for funct4 field, " | |
2156 | "value must be 0...15")); | |
2157 | break; | |
2158 | } | |
2159 | ||
2160 | INSERT_OPERAND (CFUNCT4, *ip, imm_expr->X_add_number); | |
2161 | imm_expr->X_op = O_absent; | |
2162 | s = expr_end; | |
2163 | continue; | |
2164 | case '3': | |
2165 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2166 | || imm_expr->X_op != O_constant | |
2167 | || imm_expr->X_add_number < 0 | |
2168 | || imm_expr->X_add_number >= 8) | |
2169 | { | |
2170 | as_bad (_("bad value for funct3 field, " | |
2171 | "value must be 0...7")); | |
2172 | break; | |
2173 | } | |
2174 | INSERT_OPERAND (CFUNCT3, *ip, imm_expr->X_add_number); | |
2175 | imm_expr->X_op = O_absent; | |
2176 | s = expr_end; | |
2177 | continue; | |
4765cd61 JW |
2178 | case '2': |
2179 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2180 | || imm_expr->X_op != O_constant | |
2181 | || imm_expr->X_add_number < 0 | |
2182 | || imm_expr->X_add_number >= 4) | |
2183 | { | |
2184 | as_bad (_("bad value for funct2 field, " | |
2185 | "value must be 0...3")); | |
2186 | break; | |
2187 | } | |
2188 | INSERT_OPERAND (CFUNCT2, *ip, imm_expr->X_add_number); | |
2189 | imm_expr->X_op = O_absent; | |
2190 | s = expr_end; | |
2191 | continue; | |
0e35537d JW |
2192 | default: |
2193 | as_bad (_("bad compressed FUNCT field" | |
2194 | " specifier 'CF%c'\n"), | |
2195 | *args); | |
2196 | } | |
2197 | break; | |
2198 | ||
e23eba97 NC |
2199 | default: |
2200 | as_bad (_("bad RVC field specifier 'C%c'\n"), *args); | |
2201 | } | |
2202 | break; | |
2203 | ||
2204 | case ',': | |
2205 | ++argnum; | |
2206 | if (*s++ == *args) | |
2207 | continue; | |
2208 | s--; | |
2209 | break; | |
2210 | ||
2211 | case '(': | |
2212 | case ')': | |
2213 | case '[': | |
2214 | case ']': | |
2215 | if (*s++ == *args) | |
2216 | continue; | |
2217 | break; | |
2218 | ||
2219 | case '<': /* Shift amount, 0 - 31. */ | |
2220 | my_getExpression (imm_expr, s); | |
ca2fd32c | 2221 | check_absolute_expr (ip, imm_expr, FALSE); |
e23eba97 | 2222 | if ((unsigned long) imm_expr->X_add_number > 31) |
94f78a77 AW |
2223 | as_bad (_("Improper shift amount (%lu)"), |
2224 | (unsigned long) imm_expr->X_add_number); | |
e23eba97 NC |
2225 | INSERT_OPERAND (SHAMTW, *ip, imm_expr->X_add_number); |
2226 | imm_expr->X_op = O_absent; | |
2227 | s = expr_end; | |
2228 | continue; | |
2229 | ||
2230 | case '>': /* Shift amount, 0 - (XLEN-1). */ | |
2231 | my_getExpression (imm_expr, s); | |
ca2fd32c | 2232 | check_absolute_expr (ip, imm_expr, FALSE); |
e23eba97 | 2233 | if ((unsigned long) imm_expr->X_add_number >= xlen) |
94f78a77 AW |
2234 | as_bad (_("Improper shift amount (%lu)"), |
2235 | (unsigned long) imm_expr->X_add_number); | |
e23eba97 NC |
2236 | INSERT_OPERAND (SHAMT, *ip, imm_expr->X_add_number); |
2237 | imm_expr->X_op = O_absent; | |
2238 | s = expr_end; | |
2239 | continue; | |
2240 | ||
2241 | case 'Z': /* CSRRxI immediate. */ | |
2242 | my_getExpression (imm_expr, s); | |
ca2fd32c | 2243 | check_absolute_expr (ip, imm_expr, FALSE); |
e23eba97 | 2244 | if ((unsigned long) imm_expr->X_add_number > 31) |
94f78a77 AW |
2245 | as_bad (_("Improper CSRxI immediate (%lu)"), |
2246 | (unsigned long) imm_expr->X_add_number); | |
e23eba97 NC |
2247 | INSERT_OPERAND (RS1, *ip, imm_expr->X_add_number); |
2248 | imm_expr->X_op = O_absent; | |
2249 | s = expr_end; | |
2250 | continue; | |
2251 | ||
2252 | case 'E': /* Control register. */ | |
54b2aec1 | 2253 | insn_with_csr = TRUE; |
1a79004f | 2254 | explicit_priv_attr = TRUE; |
e23eba97 NC |
2255 | if (reg_lookup (&s, RCLASS_CSR, ®no)) |
2256 | INSERT_OPERAND (CSR, *ip, regno); | |
2257 | else | |
2258 | { | |
2259 | my_getExpression (imm_expr, s); | |
ca2fd32c | 2260 | check_absolute_expr (ip, imm_expr, TRUE); |
e23eba97 | 2261 | if ((unsigned long) imm_expr->X_add_number > 0xfff) |
94f78a77 AW |
2262 | as_bad (_("Improper CSR address (%lu)"), |
2263 | (unsigned long) imm_expr->X_add_number); | |
e23eba97 NC |
2264 | INSERT_OPERAND (CSR, *ip, imm_expr->X_add_number); |
2265 | imm_expr->X_op = O_absent; | |
2266 | s = expr_end; | |
2267 | } | |
2268 | continue; | |
2269 | ||
2270 | case 'm': /* Rounding mode. */ | |
2271 | if (arg_lookup (&s, riscv_rm, ARRAY_SIZE (riscv_rm), ®no)) | |
2272 | { | |
2273 | INSERT_OPERAND (RM, *ip, regno); | |
2274 | continue; | |
2275 | } | |
2276 | break; | |
2277 | ||
2278 | case 'P': | |
2279 | case 'Q': /* Fence predecessor/successor. */ | |
2280 | if (arg_lookup (&s, riscv_pred_succ, ARRAY_SIZE (riscv_pred_succ), | |
2281 | ®no)) | |
2282 | { | |
2283 | if (*args == 'P') | |
2284 | INSERT_OPERAND (PRED, *ip, regno); | |
2285 | else | |
2286 | INSERT_OPERAND (SUCC, *ip, regno); | |
2287 | continue; | |
2288 | } | |
2289 | break; | |
2290 | ||
2291 | case 'd': /* Destination register. */ | |
2292 | case 's': /* Source register. */ | |
2293 | case 't': /* Target register. */ | |
0e35537d | 2294 | case 'r': /* rs3. */ |
e23eba97 NC |
2295 | if (reg_lookup (&s, RCLASS_GPR, ®no)) |
2296 | { | |
2297 | c = *args; | |
2298 | if (*s == ' ') | |
2299 | ++s; | |
2300 | ||
2301 | /* Now that we have assembled one operand, we use the args | |
2302 | string to figure out where it goes in the instruction. */ | |
2303 | switch (c) | |
2304 | { | |
2305 | case 's': | |
2306 | INSERT_OPERAND (RS1, *ip, regno); | |
2307 | break; | |
2308 | case 'd': | |
2309 | INSERT_OPERAND (RD, *ip, regno); | |
2310 | break; | |
2311 | case 't': | |
2312 | INSERT_OPERAND (RS2, *ip, regno); | |
2313 | break; | |
0e35537d JW |
2314 | case 'r': |
2315 | INSERT_OPERAND (RS3, *ip, regno); | |
2316 | break; | |
e23eba97 NC |
2317 | } |
2318 | continue; | |
2319 | } | |
2320 | break; | |
2321 | ||
2322 | case 'D': /* Floating point rd. */ | |
2323 | case 'S': /* Floating point rs1. */ | |
2324 | case 'T': /* Floating point rs2. */ | |
2325 | case 'U': /* Floating point rs1 and rs2. */ | |
2326 | case 'R': /* Floating point rs3. */ | |
2327 | if (reg_lookup (&s, RCLASS_FPR, ®no)) | |
2328 | { | |
2329 | c = *args; | |
2330 | if (*s == ' ') | |
2331 | ++s; | |
2332 | switch (c) | |
2333 | { | |
2334 | case 'D': | |
2335 | INSERT_OPERAND (RD, *ip, regno); | |
2336 | break; | |
2337 | case 'S': | |
2338 | INSERT_OPERAND (RS1, *ip, regno); | |
2339 | break; | |
2340 | case 'U': | |
2341 | INSERT_OPERAND (RS1, *ip, regno); | |
2342 | /* fallthru */ | |
2343 | case 'T': | |
2344 | INSERT_OPERAND (RS2, *ip, regno); | |
2345 | break; | |
2346 | case 'R': | |
2347 | INSERT_OPERAND (RS3, *ip, regno); | |
2348 | break; | |
2349 | } | |
2350 | continue; | |
2351 | } | |
2352 | ||
2353 | break; | |
2354 | ||
2355 | case 'I': | |
2356 | my_getExpression (imm_expr, s); | |
2357 | if (imm_expr->X_op != O_big | |
2358 | && imm_expr->X_op != O_constant) | |
2359 | break; | |
2360 | normalize_constant_expr (imm_expr); | |
2361 | s = expr_end; | |
2362 | continue; | |
2363 | ||
2364 | case 'A': | |
2365 | my_getExpression (imm_expr, s); | |
2366 | normalize_constant_expr (imm_expr); | |
2367 | /* The 'A' format specifier must be a symbol. */ | |
2368 | if (imm_expr->X_op != O_symbol) | |
2369 | break; | |
2370 | *imm_reloc = BFD_RELOC_32; | |
2371 | s = expr_end; | |
2372 | continue; | |
2373 | ||
160d1b3d SH |
2374 | case 'B': |
2375 | my_getExpression (imm_expr, s); | |
2376 | normalize_constant_expr (imm_expr); | |
2377 | /* The 'B' format specifier must be a symbol or a constant. */ | |
2378 | if (imm_expr->X_op != O_symbol && imm_expr->X_op != O_constant) | |
2379 | break; | |
2380 | if (imm_expr->X_op == O_symbol) | |
2381 | *imm_reloc = BFD_RELOC_32; | |
2382 | s = expr_end; | |
2383 | continue; | |
2384 | ||
e23eba97 | 2385 | case 'j': /* Sign-extended immediate. */ |
e23eba97 | 2386 | p = percent_op_itype; |
f50fabe4 | 2387 | *imm_reloc = BFD_RELOC_RISCV_LO12_I; |
e23eba97 NC |
2388 | goto alu_op; |
2389 | case 'q': /* Store displacement. */ | |
2390 | p = percent_op_stype; | |
2391 | *imm_reloc = BFD_RELOC_RISCV_LO12_S; | |
2392 | goto load_store; | |
2393 | case 'o': /* Load displacement. */ | |
2394 | p = percent_op_itype; | |
2395 | *imm_reloc = BFD_RELOC_RISCV_LO12_I; | |
2396 | goto load_store; | |
f50fabe4 | 2397 | case '1': /* 4-operand add, must be %tprel_add. */ |
e23eba97 | 2398 | p = percent_op_rtype; |
f50fabe4 JW |
2399 | goto alu_op; |
2400 | case '0': /* AMO "displacement," which must be zero. */ | |
2401 | p = percent_op_null; | |
dc1e8a47 | 2402 | load_store: |
f0531ed6 | 2403 | if (riscv_handle_implicit_zero_offset (imm_expr, s)) |
e23eba97 | 2404 | continue; |
dc1e8a47 | 2405 | alu_op: |
e23eba97 NC |
2406 | /* If this value won't fit into a 16 bit offset, then go |
2407 | find a macro that will generate the 32 bit offset | |
2408 | code pattern. */ | |
2409 | if (!my_getSmallExpression (imm_expr, imm_reloc, s, p)) | |
2410 | { | |
2411 | normalize_constant_expr (imm_expr); | |
2412 | if (imm_expr->X_op != O_constant | |
2413 | || (*args == '0' && imm_expr->X_add_number != 0) | |
f50fabe4 | 2414 | || (*args == '1') |
e23eba97 NC |
2415 | || imm_expr->X_add_number >= (signed)RISCV_IMM_REACH/2 |
2416 | || imm_expr->X_add_number < -(signed)RISCV_IMM_REACH/2) | |
2417 | break; | |
2418 | } | |
2419 | ||
2420 | s = expr_end; | |
2421 | continue; | |
2422 | ||
2423 | case 'p': /* PC-relative offset. */ | |
dc1e8a47 | 2424 | branch: |
e23eba97 NC |
2425 | *imm_reloc = BFD_RELOC_12_PCREL; |
2426 | my_getExpression (imm_expr, s); | |
2427 | s = expr_end; | |
2428 | continue; | |
2429 | ||
2430 | case 'u': /* Upper 20 bits. */ | |
2431 | p = percent_op_utype; | |
4288405d | 2432 | if (!my_getSmallExpression (imm_expr, imm_reloc, s, p)) |
e23eba97 | 2433 | { |
4288405d JW |
2434 | if (imm_expr->X_op != O_constant) |
2435 | break; | |
2436 | ||
e23eba97 NC |
2437 | if (imm_expr->X_add_number < 0 |
2438 | || imm_expr->X_add_number >= (signed)RISCV_BIGIMM_REACH) | |
2439 | as_bad (_("lui expression not in range 0..1048575")); | |
2440 | ||
2441 | *imm_reloc = BFD_RELOC_RISCV_HI20; | |
2442 | imm_expr->X_add_number <<= RISCV_IMM_BITS; | |
2443 | } | |
2444 | s = expr_end; | |
2445 | continue; | |
2446 | ||
2447 | case 'a': /* 20-bit PC-relative offset. */ | |
dc1e8a47 | 2448 | jump: |
e23eba97 NC |
2449 | my_getExpression (imm_expr, s); |
2450 | s = expr_end; | |
2451 | *imm_reloc = BFD_RELOC_RISCV_JMP; | |
2452 | continue; | |
2453 | ||
2454 | case 'c': | |
2455 | my_getExpression (imm_expr, s); | |
2456 | s = expr_end; | |
2457 | if (strcmp (s, "@plt") == 0) | |
2458 | { | |
2459 | *imm_reloc = BFD_RELOC_RISCV_CALL_PLT; | |
2460 | s += 4; | |
2461 | } | |
2462 | else | |
2463 | *imm_reloc = BFD_RELOC_RISCV_CALL; | |
2464 | continue; | |
0e35537d JW |
2465 | case 'O': |
2466 | switch (*++args) | |
2467 | { | |
2468 | case '4': | |
2469 | if (my_getOpcodeExpression (imm_expr, imm_reloc, s, p) | |
2470 | || imm_expr->X_op != O_constant | |
2471 | || imm_expr->X_add_number < 0 | |
2472 | || imm_expr->X_add_number >= 128 | |
2473 | || (imm_expr->X_add_number & 0x3) != 3) | |
2474 | { | |
2475 | as_bad (_("bad value for opcode field, " | |
2476 | "value must be 0...127 and " | |
2477 | "lower 2 bits must be 0x3")); | |
2478 | break; | |
2479 | } | |
2480 | ||
2481 | INSERT_OPERAND (OP, *ip, imm_expr->X_add_number); | |
2482 | imm_expr->X_op = O_absent; | |
2483 | s = expr_end; | |
2484 | continue; | |
2485 | case '2': | |
2486 | if (my_getOpcodeExpression (imm_expr, imm_reloc, s, p) | |
2487 | || imm_expr->X_op != O_constant | |
2488 | || imm_expr->X_add_number < 0 | |
2489 | || imm_expr->X_add_number >= 3) | |
2490 | { | |
2491 | as_bad (_("bad value for opcode field, " | |
2492 | "value must be 0...2")); | |
2493 | break; | |
2494 | } | |
2495 | ||
2496 | INSERT_OPERAND (OP2, *ip, imm_expr->X_add_number); | |
2497 | imm_expr->X_op = O_absent; | |
2498 | s = expr_end; | |
2499 | continue; | |
2500 | default: | |
2501 | as_bad (_("bad Opcode field specifier 'O%c'\n"), *args); | |
2502 | } | |
2503 | break; | |
2504 | ||
2505 | case 'F': | |
2506 | switch (*++args) | |
2507 | { | |
2508 | case '7': | |
2509 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2510 | || imm_expr->X_op != O_constant | |
2511 | || imm_expr->X_add_number < 0 | |
2512 | || imm_expr->X_add_number >= 128) | |
2513 | { | |
2514 | as_bad (_("bad value for funct7 field, " | |
2515 | "value must be 0...127")); | |
2516 | break; | |
2517 | } | |
2518 | ||
2519 | INSERT_OPERAND (FUNCT7, *ip, imm_expr->X_add_number); | |
2520 | imm_expr->X_op = O_absent; | |
2521 | s = expr_end; | |
2522 | continue; | |
2523 | case '3': | |
2524 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2525 | || imm_expr->X_op != O_constant | |
2526 | || imm_expr->X_add_number < 0 | |
2527 | || imm_expr->X_add_number >= 8) | |
2528 | { | |
2529 | as_bad (_("bad value for funct3 field, " | |
2530 | "value must be 0...7")); | |
2531 | break; | |
2532 | } | |
2533 | ||
2534 | INSERT_OPERAND (FUNCT3, *ip, imm_expr->X_add_number); | |
2535 | imm_expr->X_op = O_absent; | |
2536 | s = expr_end; | |
2537 | continue; | |
2538 | case '2': | |
2539 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2540 | || imm_expr->X_op != O_constant | |
2541 | || imm_expr->X_add_number < 0 | |
2542 | || imm_expr->X_add_number >= 4) | |
2543 | { | |
2544 | as_bad (_("bad value for funct2 field, " | |
2545 | "value must be 0...3")); | |
2546 | break; | |
2547 | } | |
2548 | ||
2549 | INSERT_OPERAND (FUNCT2, *ip, imm_expr->X_add_number); | |
2550 | imm_expr->X_op = O_absent; | |
2551 | s = expr_end; | |
2552 | continue; | |
2553 | ||
2554 | default: | |
2555 | as_bad (_("bad FUNCT field specifier 'F%c'\n"), *args); | |
2556 | } | |
2557 | break; | |
e23eba97 | 2558 | |
e925c834 JW |
2559 | case 'z': |
2560 | if (my_getSmallExpression (imm_expr, imm_reloc, s, p) | |
2561 | || imm_expr->X_op != O_constant | |
2562 | || imm_expr->X_add_number != 0) | |
2563 | break; | |
2564 | s = expr_end; | |
2565 | imm_expr->X_op = O_absent; | |
2566 | continue; | |
2567 | ||
e23eba97 NC |
2568 | default: |
2569 | as_fatal (_("internal error: bad argument type %c"), *args); | |
2570 | } | |
2571 | break; | |
2572 | } | |
2573 | s = argsStart; | |
2574 | error = _("illegal operands"); | |
54b2aec1 | 2575 | insn_with_csr = FALSE; |
e23eba97 NC |
2576 | } |
2577 | ||
dc1e8a47 | 2578 | out: |
e23eba97 NC |
2579 | /* Restore the character we might have clobbered above. */ |
2580 | if (save_c) | |
2581 | *(argsStart - 1) = save_c; | |
2582 | ||
2583 | return error; | |
2584 | } | |
2585 | ||
2586 | void | |
2587 | md_assemble (char *str) | |
2588 | { | |
2589 | struct riscv_cl_insn insn; | |
2590 | expressionS imm_expr; | |
2591 | bfd_reloc_code_real_type imm_reloc = BFD_RELOC_UNUSED; | |
2592 | ||
8f595e9b NC |
2593 | /* The arch and priv attributes should be set before assembling. */ |
2594 | if (!start_assemble) | |
2595 | { | |
2596 | start_assemble = TRUE; | |
6e1605e4 | 2597 | riscv_set_abi_by_arch (); |
e23eba97 | 2598 | |
8f595e9b NC |
2599 | /* Set the default_priv_spec according to the priv attributes. */ |
2600 | if (!riscv_set_default_priv_spec (NULL)) | |
2601 | return; | |
2602 | } | |
2603 | ||
2604 | const char *error = riscv_ip (str, &insn, &imm_expr, &imm_reloc, op_hash); | |
2dc8dd17 | 2605 | |
e23eba97 NC |
2606 | if (error) |
2607 | { | |
2608 | as_bad ("%s `%s'", error, str); | |
2609 | return; | |
2610 | } | |
2611 | ||
2612 | if (insn.insn_mo->pinfo == INSN_MACRO) | |
2613 | macro (&insn, &imm_expr, &imm_reloc); | |
2614 | else | |
2615 | append_insn (&insn, &imm_expr, imm_reloc); | |
2616 | } | |
2617 | ||
2618 | const char * | |
2619 | md_atof (int type, char *litP, int *sizeP) | |
2620 | { | |
2621 | return ieee_md_atof (type, litP, sizeP, TARGET_BYTES_BIG_ENDIAN); | |
2622 | } | |
2623 | ||
2624 | void | |
2625 | md_number_to_chars (char *buf, valueT val, int n) | |
2626 | { | |
2627 | number_to_chars_littleendian (buf, val, n); | |
2628 | } | |
2629 | ||
2630 | const char *md_shortopts = "O::g::G:"; | |
2631 | ||
2632 | enum options | |
2633 | { | |
2922d21d | 2634 | OPTION_MARCH = OPTION_MD_BASE, |
e23eba97 NC |
2635 | OPTION_PIC, |
2636 | OPTION_NO_PIC, | |
2922d21d | 2637 | OPTION_MABI, |
71060565 JW |
2638 | OPTION_RELAX, |
2639 | OPTION_NO_RELAX, | |
2dc8dd17 JW |
2640 | OPTION_ARCH_ATTR, |
2641 | OPTION_NO_ARCH_ATTR, | |
2ca89224 NC |
2642 | OPTION_CSR_CHECK, |
2643 | OPTION_NO_CSR_CHECK, | |
8f595e9b NC |
2644 | OPTION_MISA_SPEC, |
2645 | OPTION_MPRIV_SPEC, | |
e23eba97 NC |
2646 | OPTION_END_OF_ENUM |
2647 | }; | |
2648 | ||
2649 | struct option md_longopts[] = | |
2650 | { | |
e23eba97 NC |
2651 | {"march", required_argument, NULL, OPTION_MARCH}, |
2652 | {"fPIC", no_argument, NULL, OPTION_PIC}, | |
2653 | {"fpic", no_argument, NULL, OPTION_PIC}, | |
2654 | {"fno-pic", no_argument, NULL, OPTION_NO_PIC}, | |
2922d21d | 2655 | {"mabi", required_argument, NULL, OPTION_MABI}, |
71060565 JW |
2656 | {"mrelax", no_argument, NULL, OPTION_RELAX}, |
2657 | {"mno-relax", no_argument, NULL, OPTION_NO_RELAX}, | |
2dc8dd17 JW |
2658 | {"march-attr", no_argument, NULL, OPTION_ARCH_ATTR}, |
2659 | {"mno-arch-attr", no_argument, NULL, OPTION_NO_ARCH_ATTR}, | |
2ca89224 NC |
2660 | {"mcsr-check", no_argument, NULL, OPTION_CSR_CHECK}, |
2661 | {"mno-csr-check", no_argument, NULL, OPTION_NO_CSR_CHECK}, | |
8f595e9b NC |
2662 | {"misa-spec", required_argument, NULL, OPTION_MISA_SPEC}, |
2663 | {"mpriv-spec", required_argument, NULL, OPTION_MPRIV_SPEC}, | |
e23eba97 NC |
2664 | |
2665 | {NULL, no_argument, NULL, 0} | |
2666 | }; | |
2667 | size_t md_longopts_size = sizeof (md_longopts); | |
2668 | ||
e23eba97 NC |
2669 | int |
2670 | md_parse_option (int c, const char *arg) | |
2671 | { | |
2672 | switch (c) | |
2673 | { | |
e23eba97 | 2674 | case OPTION_MARCH: |
8f595e9b NC |
2675 | /* riscv_after_parse_args will call riscv_set_arch to parse |
2676 | the architecture. */ | |
2677 | default_arch_with_ext = arg; | |
e23eba97 NC |
2678 | break; |
2679 | ||
2680 | case OPTION_NO_PIC: | |
2681 | riscv_opts.pic = FALSE; | |
2682 | break; | |
2683 | ||
2684 | case OPTION_PIC: | |
2685 | riscv_opts.pic = TRUE; | |
2686 | break; | |
2687 | ||
2922d21d AW |
2688 | case OPTION_MABI: |
2689 | if (strcmp (arg, "ilp32") == 0) | |
7f999549 JW |
2690 | riscv_set_abi (32, FLOAT_ABI_SOFT, FALSE); |
2691 | else if (strcmp (arg, "ilp32e") == 0) | |
2692 | riscv_set_abi (32, FLOAT_ABI_SOFT, TRUE); | |
2922d21d | 2693 | else if (strcmp (arg, "ilp32f") == 0) |
7f999549 | 2694 | riscv_set_abi (32, FLOAT_ABI_SINGLE, FALSE); |
2922d21d | 2695 | else if (strcmp (arg, "ilp32d") == 0) |
7f999549 | 2696 | riscv_set_abi (32, FLOAT_ABI_DOUBLE, FALSE); |
2922d21d | 2697 | else if (strcmp (arg, "ilp32q") == 0) |
7f999549 | 2698 | riscv_set_abi (32, FLOAT_ABI_QUAD, FALSE); |
2922d21d | 2699 | else if (strcmp (arg, "lp64") == 0) |
7f999549 | 2700 | riscv_set_abi (64, FLOAT_ABI_SOFT, FALSE); |
2922d21d | 2701 | else if (strcmp (arg, "lp64f") == 0) |
7f999549 | 2702 | riscv_set_abi (64, FLOAT_ABI_SINGLE, FALSE); |
2922d21d | 2703 | else if (strcmp (arg, "lp64d") == 0) |
7f999549 | 2704 | riscv_set_abi (64, FLOAT_ABI_DOUBLE, FALSE); |
2922d21d | 2705 | else if (strcmp (arg, "lp64q") == 0) |
7f999549 | 2706 | riscv_set_abi (64, FLOAT_ABI_QUAD, FALSE); |
2922d21d AW |
2707 | else |
2708 | return 0; | |
6e1605e4 | 2709 | explicit_mabi = TRUE; |
2922d21d AW |
2710 | break; |
2711 | ||
71060565 JW |
2712 | case OPTION_RELAX: |
2713 | riscv_opts.relax = TRUE; | |
2714 | break; | |
2715 | ||
2716 | case OPTION_NO_RELAX: | |
2717 | riscv_opts.relax = FALSE; | |
2718 | break; | |
2719 | ||
2dc8dd17 JW |
2720 | case OPTION_ARCH_ATTR: |
2721 | riscv_opts.arch_attr = TRUE; | |
2722 | break; | |
2723 | ||
2724 | case OPTION_NO_ARCH_ATTR: | |
2725 | riscv_opts.arch_attr = FALSE; | |
2726 | break; | |
2727 | ||
2ca89224 NC |
2728 | case OPTION_CSR_CHECK: |
2729 | riscv_opts.csr_check = TRUE; | |
2730 | break; | |
2731 | ||
2732 | case OPTION_NO_CSR_CHECK: | |
2733 | riscv_opts.csr_check = FALSE; | |
2734 | break; | |
2735 | ||
8f595e9b NC |
2736 | case OPTION_MISA_SPEC: |
2737 | return riscv_set_default_isa_spec (arg); | |
2738 | ||
2739 | case OPTION_MPRIV_SPEC: | |
2740 | return riscv_set_default_priv_spec (arg); | |
2741 | ||
e23eba97 NC |
2742 | default: |
2743 | return 0; | |
2744 | } | |
2745 | ||
2746 | return 1; | |
2747 | } | |
2748 | ||
2749 | void | |
2750 | riscv_after_parse_args (void) | |
2751 | { | |
8f595e9b NC |
2752 | /* The --with-arch is optional for now, so we have to set the xlen |
2753 | according to the default_arch, which is set by the --targte, first. | |
2754 | Then, we use the xlen to set the default_arch_with_ext if the | |
2755 | -march and --with-arch are not set. */ | |
e23eba97 NC |
2756 | if (xlen == 0) |
2757 | { | |
2758 | if (strcmp (default_arch, "riscv32") == 0) | |
2759 | xlen = 32; | |
2760 | else if (strcmp (default_arch, "riscv64") == 0) | |
2761 | xlen = 64; | |
2762 | else | |
2763 | as_bad ("unknown default architecture `%s'", default_arch); | |
2764 | } | |
8f595e9b NC |
2765 | if (default_arch_with_ext == NULL) |
2766 | default_arch_with_ext = xlen == 64 ? "rv64g" : "rv32g"; | |
2767 | ||
2768 | /* Initialize the hash table for extensions with default version. */ | |
2769 | ext_version_hash = init_ext_version_hash (riscv_ext_version_table); | |
2770 | ||
2771 | /* If the -misa-spec isn't set, then we set the default ISA spec according | |
2772 | to DEFAULT_RISCV_ISA_SPEC. */ | |
2773 | if (default_isa_spec == ISA_SPEC_CLASS_NONE) | |
2774 | riscv_set_default_isa_spec (DEFAULT_RISCV_ISA_SPEC); | |
2922d21d | 2775 | |
8f595e9b NC |
2776 | /* Set the architecture according to -march or or --with-arch. */ |
2777 | riscv_set_arch (default_arch_with_ext); | |
2922d21d AW |
2778 | |
2779 | /* Add the RVC extension, regardless of -march, to support .option rvc. */ | |
fecb9c46 | 2780 | riscv_set_rvc (FALSE); |
1080bf78 | 2781 | if (riscv_subset_supports ("c")) |
2922d21d | 2782 | riscv_set_rvc (TRUE); |
2922d21d | 2783 | |
7f999549 JW |
2784 | /* Enable RVE if specified by the -march option. */ |
2785 | riscv_set_rve (FALSE); | |
1080bf78 | 2786 | if (riscv_subset_supports ("e")) |
7f999549 JW |
2787 | riscv_set_rve (TRUE); |
2788 | ||
8f595e9b NC |
2789 | /* If the -mpriv-spec isn't set, then we set the default privilege spec |
2790 | according to DEFAULT_PRIV_SPEC. */ | |
2791 | if (default_priv_spec == PRIV_SPEC_CLASS_NONE) | |
2792 | riscv_set_default_priv_spec (DEFAULT_RISCV_PRIV_SPEC); | |
2793 | ||
0ac2b354 AB |
2794 | /* If the CIE to be produced has not been overridden on the command line, |
2795 | then produce version 3 by default. This allows us to use the full | |
2796 | range of registers in a .cfi_return_column directive. */ | |
2797 | if (flag_dwarf_cie_version == -1) | |
2798 | flag_dwarf_cie_version = 3; | |
e23eba97 NC |
2799 | } |
2800 | ||
2801 | long | |
2802 | md_pcrel_from (fixS *fixP) | |
2803 | { | |
2804 | return fixP->fx_where + fixP->fx_frag->fr_address; | |
2805 | } | |
2806 | ||
2807 | /* Apply a fixup to the object file. */ | |
2808 | ||
2809 | void | |
2810 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) | |
2811 | { | |
45f76423 | 2812 | unsigned int subtype; |
e23eba97 | 2813 | bfd_byte *buf = (bfd_byte *) (fixP->fx_frag->fr_literal + fixP->fx_where); |
45f76423 | 2814 | bfd_boolean relaxable = FALSE; |
c1b465c9 | 2815 | offsetT loc; |
a6cbf936 | 2816 | segT sub_segment; |
e23eba97 NC |
2817 | |
2818 | /* Remember value for tc_gen_reloc. */ | |
2819 | fixP->fx_addnumber = *valP; | |
2820 | ||
2821 | switch (fixP->fx_r_type) | |
2822 | { | |
e23eba97 NC |
2823 | case BFD_RELOC_RISCV_HI20: |
2824 | case BFD_RELOC_RISCV_LO12_I: | |
2825 | case BFD_RELOC_RISCV_LO12_S: | |
45f76423 AW |
2826 | bfd_putl32 (riscv_apply_const_reloc (fixP->fx_r_type, *valP) |
2827 | | bfd_getl32 (buf), buf); | |
a5ec5e3f AW |
2828 | if (fixP->fx_addsy == NULL) |
2829 | fixP->fx_done = TRUE; | |
45f76423 AW |
2830 | relaxable = TRUE; |
2831 | break; | |
2832 | ||
2833 | case BFD_RELOC_RISCV_GOT_HI20: | |
e23eba97 NC |
2834 | case BFD_RELOC_RISCV_ADD8: |
2835 | case BFD_RELOC_RISCV_ADD16: | |
2836 | case BFD_RELOC_RISCV_ADD32: | |
2837 | case BFD_RELOC_RISCV_ADD64: | |
45f76423 | 2838 | case BFD_RELOC_RISCV_SUB6: |
e23eba97 NC |
2839 | case BFD_RELOC_RISCV_SUB8: |
2840 | case BFD_RELOC_RISCV_SUB16: | |
2841 | case BFD_RELOC_RISCV_SUB32: | |
2842 | case BFD_RELOC_RISCV_SUB64: | |
45f76423 AW |
2843 | case BFD_RELOC_RISCV_RELAX: |
2844 | break; | |
2845 | ||
2846 | case BFD_RELOC_RISCV_TPREL_HI20: | |
2847 | case BFD_RELOC_RISCV_TPREL_LO12_I: | |
2848 | case BFD_RELOC_RISCV_TPREL_LO12_S: | |
2849 | case BFD_RELOC_RISCV_TPREL_ADD: | |
2850 | relaxable = TRUE; | |
2851 | /* Fall through. */ | |
2852 | ||
2853 | case BFD_RELOC_RISCV_TLS_GOT_HI20: | |
2854 | case BFD_RELOC_RISCV_TLS_GD_HI20: | |
2855 | case BFD_RELOC_RISCV_TLS_DTPREL32: | |
2856 | case BFD_RELOC_RISCV_TLS_DTPREL64: | |
e294484e AW |
2857 | if (fixP->fx_addsy != NULL) |
2858 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
2859 | else | |
2860 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2861 | _("TLS relocation against a constant")); | |
e23eba97 NC |
2862 | break; |
2863 | ||
e23eba97 | 2864 | case BFD_RELOC_32: |
a6cbf936 KLC |
2865 | /* Use pc-relative relocation for FDE initial location. |
2866 | The symbol address in .eh_frame may be adjusted in | |
2867 | _bfd_elf_discard_section_eh_frame, and the content of | |
2868 | .eh_frame will be adjusted in _bfd_elf_write_section_eh_frame. | |
2869 | Therefore, we cannot insert a relocation whose addend symbol is | |
2870 | in .eh_frame. Othrewise, the value may be adjusted twice.*/ | |
2871 | if (fixP->fx_addsy && fixP->fx_subsy | |
2872 | && (sub_segment = S_GET_SEGMENT (fixP->fx_subsy)) | |
2873 | && strcmp (sub_segment->name, ".eh_frame") == 0 | |
2874 | && S_GET_VALUE (fixP->fx_subsy) | |
2875 | == fixP->fx_frag->fr_address + fixP->fx_where) | |
2876 | { | |
2877 | fixP->fx_r_type = BFD_RELOC_RISCV_32_PCREL; | |
2878 | fixP->fx_subsy = NULL; | |
2879 | break; | |
2880 | } | |
2881 | /* Fall through. */ | |
2882 | case BFD_RELOC_64: | |
e23eba97 NC |
2883 | case BFD_RELOC_16: |
2884 | case BFD_RELOC_8: | |
45f76423 | 2885 | case BFD_RELOC_RISCV_CFA: |
e23eba97 NC |
2886 | if (fixP->fx_addsy && fixP->fx_subsy) |
2887 | { | |
2888 | fixP->fx_next = xmemdup (fixP, sizeof (*fixP), sizeof (*fixP)); | |
2889 | fixP->fx_next->fx_addsy = fixP->fx_subsy; | |
2890 | fixP->fx_next->fx_subsy = NULL; | |
2891 | fixP->fx_next->fx_offset = 0; | |
2892 | fixP->fx_subsy = NULL; | |
2893 | ||
2894 | switch (fixP->fx_r_type) | |
2895 | { | |
2896 | case BFD_RELOC_64: | |
2897 | fixP->fx_r_type = BFD_RELOC_RISCV_ADD64; | |
2898 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB64; | |
2899 | break; | |
2900 | ||
2901 | case BFD_RELOC_32: | |
2902 | fixP->fx_r_type = BFD_RELOC_RISCV_ADD32; | |
2903 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB32; | |
2904 | break; | |
2905 | ||
2906 | case BFD_RELOC_16: | |
2907 | fixP->fx_r_type = BFD_RELOC_RISCV_ADD16; | |
2908 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB16; | |
2909 | break; | |
2910 | ||
2911 | case BFD_RELOC_8: | |
2912 | fixP->fx_r_type = BFD_RELOC_RISCV_ADD8; | |
2913 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB8; | |
073808ed | 2914 | break; |
e23eba97 | 2915 | |
45f76423 AW |
2916 | case BFD_RELOC_RISCV_CFA: |
2917 | /* Load the byte to get the subtype. */ | |
c1b465c9 KLC |
2918 | subtype = bfd_get_8 (NULL, &((fragS *) (fixP->fx_frag->fr_opcode))->fr_literal[fixP->fx_where]); |
2919 | loc = fixP->fx_frag->fr_fix - (subtype & 7); | |
45f76423 AW |
2920 | switch (subtype) |
2921 | { | |
2922 | case DW_CFA_advance_loc1: | |
c1b465c9 KLC |
2923 | fixP->fx_where = loc + 1; |
2924 | fixP->fx_next->fx_where = loc + 1; | |
45f76423 AW |
2925 | fixP->fx_r_type = BFD_RELOC_RISCV_SET8; |
2926 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB8; | |
2927 | break; | |
2928 | ||
2929 | case DW_CFA_advance_loc2: | |
2930 | fixP->fx_size = 2; | |
45f76423 | 2931 | fixP->fx_next->fx_size = 2; |
c1b465c9 KLC |
2932 | fixP->fx_where = loc + 1; |
2933 | fixP->fx_next->fx_where = loc + 1; | |
45f76423 AW |
2934 | fixP->fx_r_type = BFD_RELOC_RISCV_SET16; |
2935 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB16; | |
2936 | break; | |
2937 | ||
2938 | case DW_CFA_advance_loc4: | |
2939 | fixP->fx_size = 4; | |
45f76423 | 2940 | fixP->fx_next->fx_size = 4; |
c1b465c9 KLC |
2941 | fixP->fx_where = loc; |
2942 | fixP->fx_next->fx_where = loc; | |
45f76423 AW |
2943 | fixP->fx_r_type = BFD_RELOC_RISCV_SET32; |
2944 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB32; | |
2945 | break; | |
2946 | ||
2947 | default: | |
2948 | if (subtype < 0x80 && (subtype & 0x40)) | |
2949 | { | |
2950 | /* DW_CFA_advance_loc */ | |
2aece2ba KLC |
2951 | fixP->fx_frag = (fragS *) fixP->fx_frag->fr_opcode; |
2952 | fixP->fx_next->fx_frag = fixP->fx_frag; | |
45f76423 AW |
2953 | fixP->fx_r_type = BFD_RELOC_RISCV_SET6; |
2954 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_SUB6; | |
2955 | } | |
2956 | else | |
2957 | as_fatal (_("internal error: bad CFA value #%d"), subtype); | |
2958 | break; | |
2959 | } | |
2960 | break; | |
2961 | ||
e23eba97 NC |
2962 | default: |
2963 | /* This case is unreachable. */ | |
2964 | abort (); | |
2965 | } | |
2966 | } | |
2967 | /* Fall through. */ | |
2968 | ||
2969 | case BFD_RELOC_RVA: | |
2970 | /* If we are deleting this reloc entry, we must fill in the | |
2971 | value now. This can happen if we have a .word which is not | |
2972 | resolved when it appears but is later defined. */ | |
2973 | if (fixP->fx_addsy == NULL) | |
2974 | { | |
2975 | gas_assert (fixP->fx_size <= sizeof (valueT)); | |
2976 | md_number_to_chars ((char *) buf, *valP, fixP->fx_size); | |
2977 | fixP->fx_done = 1; | |
2978 | } | |
2979 | break; | |
2980 | ||
2981 | case BFD_RELOC_RISCV_JMP: | |
2982 | if (fixP->fx_addsy) | |
2983 | { | |
2984 | /* Fill in a tentative value to improve objdump readability. */ | |
2985 | bfd_vma target = S_GET_VALUE (fixP->fx_addsy) + *valP; | |
2986 | bfd_vma delta = target - md_pcrel_from (fixP); | |
2987 | bfd_putl32 (bfd_getl32 (buf) | ENCODE_UJTYPE_IMM (delta), buf); | |
2988 | } | |
2989 | break; | |
2990 | ||
2991 | case BFD_RELOC_12_PCREL: | |
2992 | if (fixP->fx_addsy) | |
2993 | { | |
2994 | /* Fill in a tentative value to improve objdump readability. */ | |
2995 | bfd_vma target = S_GET_VALUE (fixP->fx_addsy) + *valP; | |
2996 | bfd_vma delta = target - md_pcrel_from (fixP); | |
2997 | bfd_putl32 (bfd_getl32 (buf) | ENCODE_SBTYPE_IMM (delta), buf); | |
2998 | } | |
2999 | break; | |
3000 | ||
3001 | case BFD_RELOC_RISCV_RVC_BRANCH: | |
3002 | if (fixP->fx_addsy) | |
3003 | { | |
3004 | /* Fill in a tentative value to improve objdump readability. */ | |
3005 | bfd_vma target = S_GET_VALUE (fixP->fx_addsy) + *valP; | |
3006 | bfd_vma delta = target - md_pcrel_from (fixP); | |
3007 | bfd_putl16 (bfd_getl16 (buf) | ENCODE_RVC_B_IMM (delta), buf); | |
3008 | } | |
3009 | break; | |
3010 | ||
3011 | case BFD_RELOC_RISCV_RVC_JUMP: | |
3012 | if (fixP->fx_addsy) | |
3013 | { | |
3014 | /* Fill in a tentative value to improve objdump readability. */ | |
3015 | bfd_vma target = S_GET_VALUE (fixP->fx_addsy) + *valP; | |
3016 | bfd_vma delta = target - md_pcrel_from (fixP); | |
3017 | bfd_putl16 (bfd_getl16 (buf) | ENCODE_RVC_J_IMM (delta), buf); | |
3018 | } | |
3019 | break; | |
3020 | ||
e23eba97 NC |
3021 | case BFD_RELOC_RISCV_CALL: |
3022 | case BFD_RELOC_RISCV_CALL_PLT: | |
45f76423 AW |
3023 | relaxable = TRUE; |
3024 | break; | |
3025 | ||
9d06997a | 3026 | case BFD_RELOC_RISCV_PCREL_HI20: |
45f76423 AW |
3027 | case BFD_RELOC_RISCV_PCREL_LO12_S: |
3028 | case BFD_RELOC_RISCV_PCREL_LO12_I: | |
9d06997a PD |
3029 | relaxable = riscv_opts.relax; |
3030 | break; | |
3031 | ||
e23eba97 NC |
3032 | case BFD_RELOC_RISCV_ALIGN: |
3033 | break; | |
3034 | ||
3035 | default: | |
3036 | /* We ignore generic BFD relocations we don't know about. */ | |
3037 | if (bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type) != NULL) | |
3038 | as_fatal (_("internal error: bad relocation #%d"), fixP->fx_r_type); | |
3039 | } | |
45f76423 | 3040 | |
e294484e AW |
3041 | if (fixP->fx_subsy != NULL) |
3042 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3043 | _("unsupported symbol subtraction")); | |
3044 | ||
45f76423 AW |
3045 | /* Add an R_RISCV_RELAX reloc if the reloc is relaxable. */ |
3046 | if (relaxable && fixP->fx_tcbit && fixP->fx_addsy != NULL) | |
3047 | { | |
3048 | fixP->fx_next = xmemdup (fixP, sizeof (*fixP), sizeof (*fixP)); | |
3049 | fixP->fx_next->fx_addsy = fixP->fx_next->fx_subsy = NULL; | |
3050 | fixP->fx_next->fx_r_type = BFD_RELOC_RISCV_RELAX; | |
b1b11e92 | 3051 | fixP->fx_next->fx_size = 0; |
45f76423 AW |
3052 | } |
3053 | } | |
3054 | ||
3055 | /* Because the value of .cfi_remember_state may changed after relaxation, | |
3056 | we insert a fix to relocate it again in link-time. */ | |
3057 | ||
3058 | void | |
3059 | riscv_pre_output_hook (void) | |
3060 | { | |
3061 | const frchainS *frch; | |
72393fd1 JW |
3062 | segT s; |
3063 | ||
3064 | /* Save the current segment info. */ | |
3065 | segT seg = now_seg; | |
3066 | subsegT subseg = now_subseg; | |
45f76423 AW |
3067 | |
3068 | for (s = stdoutput->sections; s; s = s->next) | |
3069 | for (frch = seg_info (s)->frchainP; frch; frch = frch->frch_next) | |
3070 | { | |
7cb7b948 | 3071 | fragS *frag; |
45f76423 AW |
3072 | |
3073 | for (frag = frch->frch_root; frag; frag = frag->fr_next) | |
3074 | { | |
3075 | if (frag->fr_type == rs_cfa) | |
3076 | { | |
45f76423 | 3077 | expressionS exp; |
8d1015a8 | 3078 | expressionS *symval; |
45f76423 | 3079 | |
8d1015a8 | 3080 | symval = symbol_get_value_expression (frag->fr_symbol); |
45f76423 | 3081 | exp.X_op = O_subtract; |
8d1015a8 | 3082 | exp.X_add_symbol = symval->X_add_symbol; |
45f76423 | 3083 | exp.X_add_number = 0; |
8d1015a8 | 3084 | exp.X_op_symbol = symval->X_op_symbol; |
45f76423 | 3085 | |
72393fd1 JW |
3086 | /* We must set the segment before creating a frag after all |
3087 | frag chains have been chained together. */ | |
3088 | subseg_set (s, frch->frch_subseg); | |
3089 | ||
c1b465c9 | 3090 | fix_new_exp (frag, (int) frag->fr_offset, 1, &exp, 0, |
45f76423 AW |
3091 | BFD_RELOC_RISCV_CFA); |
3092 | } | |
3093 | } | |
3094 | } | |
72393fd1 JW |
3095 | |
3096 | /* Restore the original segment info. */ | |
3097 | subseg_set (seg, subseg); | |
e23eba97 NC |
3098 | } |
3099 | ||
45f76423 | 3100 | |
e23eba97 NC |
3101 | /* This structure is used to hold a stack of .option values. */ |
3102 | ||
3103 | struct riscv_option_stack | |
3104 | { | |
3105 | struct riscv_option_stack *next; | |
3106 | struct riscv_set_options options; | |
3107 | }; | |
3108 | ||
3109 | static struct riscv_option_stack *riscv_opts_stack; | |
3110 | ||
3111 | /* Handle the .option pseudo-op. */ | |
3112 | ||
3113 | static void | |
3114 | s_riscv_option (int x ATTRIBUTE_UNUSED) | |
3115 | { | |
3116 | char *name = input_line_pointer, ch; | |
3117 | ||
3118 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
3119 | ++input_line_pointer; | |
3120 | ch = *input_line_pointer; | |
3121 | *input_line_pointer = '\0'; | |
3122 | ||
3123 | if (strcmp (name, "rvc") == 0) | |
3124 | riscv_set_rvc (TRUE); | |
3125 | else if (strcmp (name, "norvc") == 0) | |
3126 | riscv_set_rvc (FALSE); | |
3127 | else if (strcmp (name, "pic") == 0) | |
3128 | riscv_opts.pic = TRUE; | |
3129 | else if (strcmp (name, "nopic") == 0) | |
3130 | riscv_opts.pic = FALSE; | |
45f76423 AW |
3131 | else if (strcmp (name, "relax") == 0) |
3132 | riscv_opts.relax = TRUE; | |
3133 | else if (strcmp (name, "norelax") == 0) | |
3134 | riscv_opts.relax = FALSE; | |
2ca89224 NC |
3135 | else if (strcmp (name, "csr-check") == 0) |
3136 | riscv_opts.csr_check = TRUE; | |
3137 | else if (strcmp (name, "no-csr-check") == 0) | |
3138 | riscv_opts.csr_check = FALSE; | |
e23eba97 NC |
3139 | else if (strcmp (name, "push") == 0) |
3140 | { | |
3141 | struct riscv_option_stack *s; | |
3142 | ||
3143 | s = (struct riscv_option_stack *) xmalloc (sizeof *s); | |
3144 | s->next = riscv_opts_stack; | |
3145 | s->options = riscv_opts; | |
3146 | riscv_opts_stack = s; | |
3147 | } | |
3148 | else if (strcmp (name, "pop") == 0) | |
3149 | { | |
3150 | struct riscv_option_stack *s; | |
3151 | ||
3152 | s = riscv_opts_stack; | |
3153 | if (s == NULL) | |
3154 | as_bad (_(".option pop with no .option push")); | |
3155 | else | |
3156 | { | |
3157 | riscv_opts = s->options; | |
3158 | riscv_opts_stack = s->next; | |
3159 | free (s); | |
3160 | } | |
3161 | } | |
3162 | else | |
3163 | { | |
3164 | as_warn (_("Unrecognized .option directive: %s\n"), name); | |
3165 | } | |
3166 | *input_line_pointer = ch; | |
3167 | demand_empty_rest_of_line (); | |
3168 | } | |
3169 | ||
3170 | /* Handle the .dtprelword and .dtpreldword pseudo-ops. They generate | |
3171 | a 32-bit or 64-bit DTP-relative relocation (BYTES says which) for | |
3172 | use in DWARF debug information. */ | |
3173 | ||
3174 | static void | |
3175 | s_dtprel (int bytes) | |
3176 | { | |
3177 | expressionS ex; | |
3178 | char *p; | |
3179 | ||
3180 | expression (&ex); | |
3181 | ||
3182 | if (ex.X_op != O_symbol) | |
3183 | { | |
3184 | as_bad (_("Unsupported use of %s"), (bytes == 8 | |
3185 | ? ".dtpreldword" | |
3186 | : ".dtprelword")); | |
3187 | ignore_rest_of_line (); | |
3188 | } | |
3189 | ||
3190 | p = frag_more (bytes); | |
3191 | md_number_to_chars (p, 0, bytes); | |
3192 | fix_new_exp (frag_now, p - frag_now->fr_literal, bytes, &ex, FALSE, | |
3193 | (bytes == 8 | |
3194 | ? BFD_RELOC_RISCV_TLS_DTPREL64 | |
3195 | : BFD_RELOC_RISCV_TLS_DTPREL32)); | |
3196 | ||
3197 | demand_empty_rest_of_line (); | |
3198 | } | |
3199 | ||
3200 | /* Handle the .bss pseudo-op. */ | |
3201 | ||
3202 | static void | |
3203 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
3204 | { | |
3205 | subseg_set (bss_section, 0); | |
3206 | demand_empty_rest_of_line (); | |
3207 | } | |
3208 | ||
e23eba97 | 3209 | static void |
d115ab8e | 3210 | riscv_make_nops (char *buf, bfd_vma bytes) |
e23eba97 | 3211 | { |
d115ab8e | 3212 | bfd_vma i = 0; |
e23eba97 | 3213 | |
e5b737de AW |
3214 | /* RISC-V instructions cannot begin or end on odd addresses, so this case |
3215 | means we are not within a valid instruction sequence. It is thus safe | |
3216 | to use a zero byte, even though that is not a valid instruction. */ | |
3217 | if (bytes % 2 == 1) | |
3218 | buf[i++] = 0; | |
3219 | ||
3220 | /* Use at most one 2-byte NOP. */ | |
3221 | if ((bytes - i) % 4 == 2) | |
e23eba97 | 3222 | { |
e5b737de | 3223 | md_number_to_chars (buf + i, RVC_NOP, 2); |
d115ab8e | 3224 | i += 2; |
e23eba97 NC |
3225 | } |
3226 | ||
e5b737de | 3227 | /* Fill the remainder with 4-byte NOPs. */ |
d115ab8e AW |
3228 | for ( ; i < bytes; i += 4) |
3229 | md_number_to_chars (buf + i, RISCV_NOP, 4); | |
3230 | } | |
e23eba97 | 3231 | |
d115ab8e AW |
3232 | /* Called from md_do_align. Used to create an alignment frag in a |
3233 | code section by emitting a worst-case NOP sequence that the linker | |
3234 | will later relax to the correct number of NOPs. We can't compute | |
3235 | the correct alignment now because of other linker relaxations. */ | |
3236 | ||
3237 | bfd_boolean | |
3238 | riscv_frag_align_code (int n) | |
3239 | { | |
e5b737de | 3240 | bfd_vma bytes = (bfd_vma) 1 << n; |
36877bfb JW |
3241 | bfd_vma insn_alignment = riscv_opts.rvc ? 2 : 4; |
3242 | bfd_vma worst_case_bytes = bytes - insn_alignment; | |
3243 | char *nops; | |
ed0816bd | 3244 | expressionS ex; |
d115ab8e | 3245 | |
36877bfb JW |
3246 | /* If we are moving to a smaller alignment than the instruction size, then no |
3247 | alignment is required. */ | |
3248 | if (bytes <= insn_alignment) | |
3249 | return TRUE; | |
3250 | ||
d115ab8e AW |
3251 | /* When not relaxing, riscv_handle_align handles code alignment. */ |
3252 | if (!riscv_opts.relax) | |
3253 | return FALSE; | |
e23eba97 | 3254 | |
e80ae190 JW |
3255 | nops = frag_more (worst_case_bytes); |
3256 | ||
ed0816bd PD |
3257 | ex.X_op = O_constant; |
3258 | ex.X_add_number = worst_case_bytes; | |
d115ab8e | 3259 | |
ed0816bd | 3260 | riscv_make_nops (nops, worst_case_bytes); |
e23eba97 | 3261 | |
ed0816bd PD |
3262 | fix_new_exp (frag_now, nops - frag_now->fr_literal, 0, |
3263 | &ex, FALSE, BFD_RELOC_RISCV_ALIGN); | |
e23eba97 | 3264 | |
d115ab8e AW |
3265 | return TRUE; |
3266 | } | |
e23eba97 | 3267 | |
d115ab8e AW |
3268 | /* Implement HANDLE_ALIGN. */ |
3269 | ||
3270 | void | |
3271 | riscv_handle_align (fragS *fragP) | |
3272 | { | |
3273 | switch (fragP->fr_type) | |
3274 | { | |
3275 | case rs_align_code: | |
3276 | /* When relaxing, riscv_frag_align_code handles code alignment. */ | |
3277 | if (!riscv_opts.relax) | |
3278 | { | |
e80ae190 JW |
3279 | bfd_signed_vma bytes = (fragP->fr_next->fr_address |
3280 | - fragP->fr_address - fragP->fr_fix); | |
3281 | /* We have 4 byte uncompressed nops. */ | |
3282 | bfd_signed_vma size = 4; | |
3283 | bfd_signed_vma excess = bytes % size; | |
3284 | char *p = fragP->fr_literal + fragP->fr_fix; | |
3285 | ||
3286 | if (bytes <= 0) | |
d115ab8e AW |
3287 | break; |
3288 | ||
e80ae190 JW |
3289 | /* Insert zeros or compressed nops to get 4 byte alignment. */ |
3290 | if (excess) | |
3291 | { | |
3292 | riscv_make_nops (p, excess); | |
3293 | fragP->fr_fix += excess; | |
3294 | p += excess; | |
3295 | } | |
3296 | ||
3297 | /* Insert variable number of 4 byte uncompressed nops. */ | |
3298 | riscv_make_nops (p, size); | |
3299 | fragP->fr_var = size; | |
d115ab8e AW |
3300 | } |
3301 | break; | |
3302 | ||
3303 | default: | |
3304 | break; | |
3305 | } | |
e23eba97 NC |
3306 | } |
3307 | ||
3308 | int | |
3309 | md_estimate_size_before_relax (fragS *fragp, asection *segtype) | |
3310 | { | |
3311 | return (fragp->fr_var = relaxed_branch_length (fragp, segtype, FALSE)); | |
3312 | } | |
3313 | ||
3314 | /* Translate internal representation of relocation info to BFD target | |
3315 | format. */ | |
3316 | ||
3317 | arelent * | |
3318 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) | |
3319 | { | |
3320 | arelent *reloc = (arelent *) xmalloc (sizeof (arelent)); | |
3321 | ||
3322 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
3323 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
3324 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
3325 | reloc->addend = fixp->fx_addnumber; | |
3326 | ||
3327 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
3328 | if (reloc->howto == NULL) | |
3329 | { | |
3330 | if ((fixp->fx_r_type == BFD_RELOC_16 || fixp->fx_r_type == BFD_RELOC_8) | |
3331 | && fixp->fx_addsy != NULL && fixp->fx_subsy != NULL) | |
3332 | { | |
3333 | /* We don't have R_RISCV_8/16, but for this special case, | |
3334 | we can use R_RISCV_ADD8/16 with R_RISCV_SUB8/16. */ | |
3335 | return reloc; | |
3336 | } | |
3337 | ||
3338 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
3339 | _("cannot represent %s relocation in object file"), | |
3340 | bfd_get_reloc_code_name (fixp->fx_r_type)); | |
3341 | return NULL; | |
3342 | } | |
3343 | ||
3344 | return reloc; | |
3345 | } | |
3346 | ||
3347 | int | |
3348 | riscv_relax_frag (asection *sec, fragS *fragp, long stretch ATTRIBUTE_UNUSED) | |
3349 | { | |
3350 | if (RELAX_BRANCH_P (fragp->fr_subtype)) | |
3351 | { | |
3352 | offsetT old_var = fragp->fr_var; | |
3353 | fragp->fr_var = relaxed_branch_length (fragp, sec, TRUE); | |
3354 | return fragp->fr_var - old_var; | |
3355 | } | |
3356 | ||
3357 | return 0; | |
3358 | } | |
3359 | ||
3360 | /* Expand far branches to multi-instruction sequences. */ | |
3361 | ||
3362 | static void | |
3363 | md_convert_frag_branch (fragS *fragp) | |
3364 | { | |
3365 | bfd_byte *buf; | |
3366 | expressionS exp; | |
3367 | fixS *fixp; | |
3368 | insn_t insn; | |
3369 | int rs1, reloc; | |
3370 | ||
3371 | buf = (bfd_byte *)fragp->fr_literal + fragp->fr_fix; | |
3372 | ||
3373 | exp.X_op = O_symbol; | |
3374 | exp.X_add_symbol = fragp->fr_symbol; | |
3375 | exp.X_add_number = fragp->fr_offset; | |
3376 | ||
3377 | gas_assert (fragp->fr_var == RELAX_BRANCH_LENGTH (fragp->fr_subtype)); | |
3378 | ||
3379 | if (RELAX_BRANCH_RVC (fragp->fr_subtype)) | |
3380 | { | |
3381 | switch (RELAX_BRANCH_LENGTH (fragp->fr_subtype)) | |
3382 | { | |
3383 | case 8: | |
3384 | case 4: | |
3385 | /* Expand the RVC branch into a RISC-V one. */ | |
3386 | insn = bfd_getl16 (buf); | |
3387 | rs1 = 8 + ((insn >> OP_SH_CRS1S) & OP_MASK_CRS1S); | |
3388 | if ((insn & MASK_C_J) == MATCH_C_J) | |
3389 | insn = MATCH_JAL; | |
3390 | else if ((insn & MASK_C_JAL) == MATCH_C_JAL) | |
3391 | insn = MATCH_JAL | (X_RA << OP_SH_RD); | |
3392 | else if ((insn & MASK_C_BEQZ) == MATCH_C_BEQZ) | |
3393 | insn = MATCH_BEQ | (rs1 << OP_SH_RS1); | |
3394 | else if ((insn & MASK_C_BNEZ) == MATCH_C_BNEZ) | |
3395 | insn = MATCH_BNE | (rs1 << OP_SH_RS1); | |
3396 | else | |
3397 | abort (); | |
3398 | bfd_putl32 (insn, buf); | |
3399 | break; | |
3400 | ||
3401 | case 6: | |
3402 | /* Invert the branch condition. Branch over the jump. */ | |
3403 | insn = bfd_getl16 (buf); | |
3404 | insn ^= MATCH_C_BEQZ ^ MATCH_C_BNEZ; | |
3405 | insn |= ENCODE_RVC_B_IMM (6); | |
3406 | bfd_putl16 (insn, buf); | |
3407 | buf += 2; | |
3408 | goto jump; | |
3409 | ||
3410 | case 2: | |
3411 | /* Just keep the RVC branch. */ | |
3412 | reloc = RELAX_BRANCH_UNCOND (fragp->fr_subtype) | |
3413 | ? BFD_RELOC_RISCV_RVC_JUMP : BFD_RELOC_RISCV_RVC_BRANCH; | |
3414 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, | |
3415 | 2, &exp, FALSE, reloc); | |
3416 | buf += 2; | |
3417 | goto done; | |
3418 | ||
3419 | default: | |
1d65abb5 | 3420 | abort (); |
e23eba97 NC |
3421 | } |
3422 | } | |
3423 | ||
3424 | switch (RELAX_BRANCH_LENGTH (fragp->fr_subtype)) | |
3425 | { | |
3426 | case 8: | |
3427 | gas_assert (!RELAX_BRANCH_UNCOND (fragp->fr_subtype)); | |
3428 | ||
3429 | /* Invert the branch condition. Branch over the jump. */ | |
3430 | insn = bfd_getl32 (buf); | |
3431 | insn ^= MATCH_BEQ ^ MATCH_BNE; | |
3432 | insn |= ENCODE_SBTYPE_IMM (8); | |
3433 | md_number_to_chars ((char *) buf, insn, 4); | |
3434 | buf += 4; | |
3435 | ||
dc1e8a47 | 3436 | jump: |
e23eba97 NC |
3437 | /* Jump to the target. */ |
3438 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, | |
3439 | 4, &exp, FALSE, BFD_RELOC_RISCV_JMP); | |
3440 | md_number_to_chars ((char *) buf, MATCH_JAL, 4); | |
3441 | buf += 4; | |
3442 | break; | |
3443 | ||
3444 | case 4: | |
3445 | reloc = RELAX_BRANCH_UNCOND (fragp->fr_subtype) | |
3446 | ? BFD_RELOC_RISCV_JMP : BFD_RELOC_12_PCREL; | |
3447 | fixp = fix_new_exp (fragp, buf - (bfd_byte *)fragp->fr_literal, | |
3448 | 4, &exp, FALSE, reloc); | |
3449 | buf += 4; | |
3450 | break; | |
3451 | ||
3452 | default: | |
3453 | abort (); | |
3454 | } | |
3455 | ||
dc1e8a47 | 3456 | done: |
e23eba97 NC |
3457 | fixp->fx_file = fragp->fr_file; |
3458 | fixp->fx_line = fragp->fr_line; | |
3459 | ||
3460 | gas_assert (buf == (bfd_byte *)fragp->fr_literal | |
3461 | + fragp->fr_fix + fragp->fr_var); | |
3462 | ||
3463 | fragp->fr_fix += fragp->fr_var; | |
3464 | } | |
3465 | ||
3466 | /* Relax a machine dependent frag. This returns the amount by which | |
3467 | the current size of the frag should change. */ | |
3468 | ||
3469 | void | |
3470 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec ATTRIBUTE_UNUSED, | |
3471 | fragS *fragp) | |
3472 | { | |
3473 | gas_assert (RELAX_BRANCH_P (fragp->fr_subtype)); | |
3474 | md_convert_frag_branch (fragp); | |
3475 | } | |
3476 | ||
3477 | void | |
3478 | md_show_usage (FILE *stream) | |
3479 | { | |
3480 | fprintf (stream, _("\ | |
3481 | RISC-V options:\n\ | |
8f595e9b NC |
3482 | -fpic generate position-independent code\n\ |
3483 | -fno-pic don't generate position-independent code (default)\n\ | |
3484 | -march=ISA set the RISC-V architecture\n\ | |
3485 | -misa-spec=ISAspec set the RISC-V ISA spec (2.2, 20190608, 20191213)\n\ | |
3486 | -mpriv-spec=PRIVspec set the RISC-V privilege spec (1.9, 1.9.1, 1.10, 1.11)\n\ | |
3487 | -mabi=ABI set the RISC-V ABI\n\ | |
3488 | -mrelax enable relax (default)\n\ | |
3489 | -mno-relax disable relax\n\ | |
3490 | -march-attr generate RISC-V arch attribute\n\ | |
3491 | -mno-arch-attr don't generate RISC-V arch attribute\n\ | |
e23eba97 NC |
3492 | ")); |
3493 | } | |
3494 | ||
3495 | /* Standard calling conventions leave the CFA at SP on entry. */ | |
3496 | void | |
3497 | riscv_cfi_frame_initial_instructions (void) | |
3498 | { | |
3499 | cfi_add_CFA_def_cfa_register (X_SP); | |
3500 | } | |
3501 | ||
3502 | int | |
3503 | tc_riscv_regname_to_dw2regnum (char *regname) | |
3504 | { | |
3505 | int reg; | |
3506 | ||
3507 | if ((reg = reg_lookup_internal (regname, RCLASS_GPR)) >= 0) | |
3508 | return reg; | |
3509 | ||
3510 | if ((reg = reg_lookup_internal (regname, RCLASS_FPR)) >= 0) | |
3511 | return reg + 32; | |
3512 | ||
4762fe62 AB |
3513 | /* CSRs are numbered 4096 -> 8191. */ |
3514 | if ((reg = reg_lookup_internal (regname, RCLASS_CSR)) >= 0) | |
3515 | return reg + 4096; | |
3516 | ||
e23eba97 NC |
3517 | as_bad (_("unknown register `%s'"), regname); |
3518 | return -1; | |
3519 | } | |
3520 | ||
3521 | void | |
3522 | riscv_elf_final_processing (void) | |
3523 | { | |
6e1605e4 | 3524 | riscv_set_abi_by_arch (); |
e23eba97 | 3525 | elf_elfheader (stdoutput)->e_flags |= elf_flags; |
e23eba97 NC |
3526 | } |
3527 | ||
3528 | /* Parse the .sleb128 and .uleb128 pseudos. Only allow constant expressions, | |
3529 | since these directives break relaxation when used with symbol deltas. */ | |
3530 | ||
3531 | static void | |
3532 | s_riscv_leb128 (int sign) | |
3533 | { | |
3534 | expressionS exp; | |
3535 | char *save_in = input_line_pointer; | |
3536 | ||
3537 | expression (&exp); | |
3538 | if (exp.X_op != O_constant) | |
3539 | as_bad (_("non-constant .%cleb128 is not supported"), sign ? 's' : 'u'); | |
3540 | demand_empty_rest_of_line (); | |
3541 | ||
3542 | input_line_pointer = save_in; | |
3543 | return s_leb128 (sign); | |
3544 | } | |
3545 | ||
0e35537d JW |
3546 | /* Parse the .insn directive. */ |
3547 | ||
3548 | static void | |
3549 | s_riscv_insn (int x ATTRIBUTE_UNUSED) | |
3550 | { | |
3551 | char *str = input_line_pointer; | |
3552 | struct riscv_cl_insn insn; | |
3553 | expressionS imm_expr; | |
3554 | bfd_reloc_code_real_type imm_reloc = BFD_RELOC_UNUSED; | |
3555 | char save_c; | |
3556 | ||
3557 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
3558 | ++input_line_pointer; | |
3559 | ||
3560 | save_c = *input_line_pointer; | |
3561 | *input_line_pointer = '\0'; | |
3562 | ||
3563 | const char *error = riscv_ip (str, &insn, &imm_expr, | |
3564 | &imm_reloc, insn_type_hash); | |
3565 | ||
3566 | if (error) | |
3567 | { | |
3568 | as_bad ("%s `%s'", error, str); | |
3569 | } | |
3570 | else | |
3571 | { | |
3572 | gas_assert (insn.insn_mo->pinfo != INSN_MACRO); | |
3573 | append_insn (&insn, &imm_expr, imm_reloc); | |
3574 | } | |
3575 | ||
3576 | *input_line_pointer = save_c; | |
3577 | demand_empty_rest_of_line (); | |
3578 | } | |
3579 | ||
8f595e9b NC |
3580 | /* Update arch and priv attributes. If we don't set the corresponding ELF |
3581 | attributes, then try to output the default ones. */ | |
2dc8dd17 JW |
3582 | |
3583 | static void | |
8f595e9b | 3584 | riscv_write_out_attrs (void) |
2dc8dd17 | 3585 | { |
8f595e9b NC |
3586 | const char *arch_str, *priv_str, *p; |
3587 | /* versions[0] is major, versions[1] is minor, | |
3588 | and versions[3] is revision. */ | |
3589 | unsigned versions[3] = {0}, number = 0; | |
3590 | unsigned int i; | |
2dc8dd17 | 3591 | |
8f595e9b NC |
3592 | /* Re-write arch attribute to normalize the arch string. */ |
3593 | arch_str = riscv_arch_str (xlen, &riscv_subsets); | |
2dc8dd17 | 3594 | bfd_elf_add_proc_attr_string (stdoutput, Tag_RISCV_arch, arch_str); |
2dc8dd17 | 3595 | xfree ((void *)arch_str); |
8f595e9b NC |
3596 | |
3597 | /* For the file without any instruction, we don't set the default_priv_spec | |
3598 | according to the priv attributes since the md_assemble isn't called. | |
3599 | Call riscv_set_default_priv_spec here for the above case, although | |
3600 | it seems strange. */ | |
3601 | if (!start_assemble | |
3602 | && !riscv_set_default_priv_spec (NULL)) | |
3603 | return; | |
3604 | ||
1a79004f NC |
3605 | /* If we already have set elf priv attributes, then no need to do anything, |
3606 | assembler will generate them according to what you set. Otherwise, don't | |
3607 | generate or update them when no CSR and priv instructions are used. | |
3608 | Generate the priv attributes according to default_priv_spec, which can be | |
3609 | set by -mpriv-spec and --with-priv-spec, and be updated by the original | |
3610 | priv attribute sets. */ | |
3611 | if (!explicit_priv_attr) | |
3fc6c3dc NC |
3612 | return; |
3613 | ||
8f595e9b NC |
3614 | /* Re-write priv attributes by default_priv_spec. */ |
3615 | priv_str = riscv_get_priv_spec_name (default_priv_spec); | |
3616 | p = priv_str; | |
3617 | for (i = 0; *p; ++p) | |
3618 | { | |
3619 | if (*p == '.' && i < 3) | |
3620 | { | |
3621 | versions[i++] = number; | |
3622 | number = 0; | |
3623 | } | |
3624 | else if (ISDIGIT (*p)) | |
3625 | number = (number * 10) + (*p - '0'); | |
3626 | else | |
3627 | { | |
3628 | as_bad (_("internal: bad RISC-V priv spec string (%s)"), priv_str); | |
3629 | return; | |
3630 | } | |
3631 | } | |
3632 | versions[i] = number; | |
3633 | ||
3634 | /* Set the priv attributes. */ | |
3635 | bfd_elf_add_proc_attr_int (stdoutput, Tag_RISCV_priv_spec, versions[0]); | |
3636 | bfd_elf_add_proc_attr_int (stdoutput, Tag_RISCV_priv_spec_minor, versions[1]); | |
3637 | bfd_elf_add_proc_attr_int (stdoutput, Tag_RISCV_priv_spec_revision, versions[2]); | |
2dc8dd17 JW |
3638 | } |
3639 | ||
8f595e9b NC |
3640 | /* Add the default contents for the .riscv.attributes section. If any |
3641 | ELF attribute or -march-attr options is set, call riscv_write_out_attrs | |
3642 | to update the arch and priv attributes. */ | |
2dc8dd17 JW |
3643 | |
3644 | static void | |
3645 | riscv_set_public_attributes (void) | |
3646 | { | |
8f595e9b NC |
3647 | if (riscv_opts.arch_attr || explicit_attr) |
3648 | riscv_write_out_attrs (); | |
2dc8dd17 JW |
3649 | } |
3650 | ||
3651 | /* Called after all assembly has been done. */ | |
3652 | ||
3653 | void | |
3654 | riscv_md_end (void) | |
3655 | { | |
3656 | riscv_set_public_attributes (); | |
3657 | } | |
3658 | ||
3659 | /* Given a symbolic attribute NAME, return the proper integer value. | |
3660 | Returns -1 if the attribute is not known. */ | |
3661 | ||
3662 | int | |
3663 | riscv_convert_symbolic_attribute (const char *name) | |
3664 | { | |
3665 | static const struct | |
3666 | { | |
3667 | const char * name; | |
3668 | const int tag; | |
3669 | } | |
3670 | attribute_table[] = | |
3671 | { | |
3672 | /* When you modify this table you should | |
3673 | also modify the list in doc/c-riscv.texi. */ | |
3674 | #define T(tag) {#tag, Tag_RISCV_##tag}, {"Tag_RISCV_" #tag, Tag_RISCV_##tag} | |
3675 | T(arch), | |
3676 | T(priv_spec), | |
3677 | T(priv_spec_minor), | |
3678 | T(priv_spec_revision), | |
3679 | T(unaligned_access), | |
3680 | T(stack_align), | |
3681 | #undef T | |
3682 | }; | |
3683 | ||
3684 | unsigned int i; | |
3685 | ||
3686 | if (name == NULL) | |
3687 | return -1; | |
3688 | ||
3689 | for (i = 0; i < ARRAY_SIZE (attribute_table); i++) | |
3690 | if (strcmp (name, attribute_table[i].name) == 0) | |
3691 | return attribute_table[i].tag; | |
3692 | ||
3693 | return -1; | |
3694 | } | |
3695 | ||
3696 | /* Parse a .attribute directive. */ | |
3697 | ||
3698 | static void | |
3699 | s_riscv_attribute (int ignored ATTRIBUTE_UNUSED) | |
3700 | { | |
3701 | int tag = obj_elf_vendor_attribute (OBJ_ATTR_PROC); | |
8f595e9b NC |
3702 | unsigned old_xlen; |
3703 | obj_attribute *attr; | |
2dc8dd17 | 3704 | |
8f595e9b NC |
3705 | explicit_attr = TRUE; |
3706 | switch (tag) | |
2dc8dd17 | 3707 | { |
8f595e9b NC |
3708 | case Tag_RISCV_arch: |
3709 | old_xlen = xlen; | |
2dc8dd17 JW |
3710 | attr = elf_known_obj_attributes_proc (stdoutput); |
3711 | if (!start_assemble) | |
3712 | riscv_set_arch (attr[Tag_RISCV_arch].s); | |
3713 | else | |
3714 | as_fatal (_(".attribute arch must set before any instructions")); | |
3715 | ||
3716 | if (old_xlen != xlen) | |
3717 | { | |
3718 | /* We must re-init bfd again if xlen is changed. */ | |
3719 | unsigned long mach = xlen == 64 ? bfd_mach_riscv64 : bfd_mach_riscv32; | |
3720 | bfd_find_target (riscv_target_format (), stdoutput); | |
3721 | ||
3722 | if (! bfd_set_arch_mach (stdoutput, bfd_arch_riscv, mach)) | |
3723 | as_warn (_("Could not set architecture and machine")); | |
3724 | } | |
8f595e9b NC |
3725 | break; |
3726 | ||
3727 | case Tag_RISCV_priv_spec: | |
3728 | case Tag_RISCV_priv_spec_minor: | |
3729 | case Tag_RISCV_priv_spec_revision: | |
3730 | if (start_assemble) | |
3731 | as_fatal (_(".attribute priv spec must set before any instructions")); | |
3732 | break; | |
3733 | ||
3734 | default: | |
3735 | break; | |
2dc8dd17 JW |
3736 | } |
3737 | } | |
3738 | ||
e23eba97 NC |
3739 | /* Pseudo-op table. */ |
3740 | ||
3741 | static const pseudo_typeS riscv_pseudo_table[] = | |
3742 | { | |
3743 | /* RISC-V-specific pseudo-ops. */ | |
3744 | {"option", s_riscv_option, 0}, | |
3745 | {"half", cons, 2}, | |
3746 | {"word", cons, 4}, | |
3747 | {"dword", cons, 8}, | |
3748 | {"dtprelword", s_dtprel, 4}, | |
3749 | {"dtpreldword", s_dtprel, 8}, | |
3750 | {"bss", s_bss, 0}, | |
e23eba97 NC |
3751 | {"uleb128", s_riscv_leb128, 0}, |
3752 | {"sleb128", s_riscv_leb128, 1}, | |
0e35537d | 3753 | {"insn", s_riscv_insn, 0}, |
2dc8dd17 | 3754 | {"attribute", s_riscv_attribute, 0}, |
e23eba97 NC |
3755 | |
3756 | { NULL, NULL, 0 }, | |
3757 | }; | |
3758 | ||
3759 | void | |
3760 | riscv_pop_insert (void) | |
3761 | { | |
3762 | extern void pop_insert (const pseudo_typeS *); | |
3763 | ||
3764 | pop_insert (riscv_pseudo_table); | |
3765 | } |