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e23eba97 | 1 | /* RISC-V disassembler |
250d07de | 2 | Copyright (C) 2011-2021 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 the GNU opcodes library. | |
8 | ||
9 | This library 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 | It is distributed in the hope that it will be useful, but WITHOUT | |
15 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
16 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
17 | 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 "sysdep.h" | |
88c1242d | 24 | #include "disassemble.h" |
e23eba97 NC |
25 | #include "libiberty.h" |
26 | #include "opcode/riscv.h" | |
27 | #include "opintl.h" | |
28 | #include "elf-bfd.h" | |
29 | #include "elf/riscv.h" | |
3d73d29e | 30 | #include "cpu-riscv.h" |
e23eba97 | 31 | |
3dfb1b6d | 32 | #include <stdint.h> |
e23eba97 NC |
33 | #include <ctype.h> |
34 | ||
3d73d29e | 35 | static enum riscv_spec_class default_priv_spec = PRIV_SPEC_CLASS_NONE; |
8f595e9b | 36 | |
e23eba97 NC |
37 | struct riscv_private_data |
38 | { | |
39 | bfd_vma gp; | |
40 | bfd_vma print_addr; | |
41 | bfd_vma hi_addr[OP_MASK_RD + 1]; | |
42 | }; | |
43 | ||
9b9b1092 NC |
44 | /* Used for mapping symbols. */ |
45 | static int last_map_symbol = -1; | |
46 | static bfd_vma last_stop_offset = 0; | |
47 | enum riscv_seg_mstate last_map_state; | |
48 | ||
e23eba97 NC |
49 | static const char * const *riscv_gpr_names; |
50 | static const char * const *riscv_fpr_names; | |
51 | ||
dcd709e0 NC |
52 | /* If set, disassemble as most general instruction. */ |
53 | static int no_aliases; | |
e23eba97 NC |
54 | |
55 | static void | |
56 | set_default_riscv_dis_options (void) | |
57 | { | |
58 | riscv_gpr_names = riscv_gpr_names_abi; | |
59 | riscv_fpr_names = riscv_fpr_names_abi; | |
60 | no_aliases = 0; | |
61 | } | |
62 | ||
78933a4a | 63 | static bool |
8f595e9b | 64 | parse_riscv_dis_option_without_args (const char *option) |
e23eba97 NC |
65 | { |
66 | if (strcmp (option, "no-aliases") == 0) | |
67 | no_aliases = 1; | |
68 | else if (strcmp (option, "numeric") == 0) | |
69 | { | |
70 | riscv_gpr_names = riscv_gpr_names_numeric; | |
71 | riscv_fpr_names = riscv_fpr_names_numeric; | |
72 | } | |
8f595e9b | 73 | else |
78933a4a AM |
74 | return false; |
75 | return true; | |
8f595e9b NC |
76 | } |
77 | ||
78 | static void | |
79 | parse_riscv_dis_option (const char *option) | |
80 | { | |
81 | char *equal, *value; | |
82 | ||
83 | if (parse_riscv_dis_option_without_args (option)) | |
84 | return; | |
85 | ||
86 | equal = strchr (option, '='); | |
87 | if (equal == NULL) | |
88 | { | |
89 | /* The option without '=' should be defined above. */ | |
90 | opcodes_error_handler (_("unrecognized disassembler option: %s"), option); | |
91 | return; | |
92 | } | |
93 | if (equal == option | |
94 | || *(equal + 1) == '\0') | |
95 | { | |
96 | /* Invalid options with '=', no option name before '=', | |
97 | and no value after '='. */ | |
98 | opcodes_error_handler (_("unrecognized disassembler option with '=': %s"), | |
99 | option); | |
100 | return; | |
101 | } | |
102 | ||
103 | *equal = '\0'; | |
104 | value = equal + 1; | |
105 | if (strcmp (option, "priv-spec") == 0) | |
106 | { | |
3d73d29e NC |
107 | enum riscv_spec_class priv_spec = PRIV_SPEC_CLASS_NONE; |
108 | const char *name = NULL; | |
109 | ||
110 | RISCV_GET_PRIV_SPEC_CLASS (value, priv_spec); | |
111 | if (priv_spec == PRIV_SPEC_CLASS_NONE) | |
b800637e | 112 | opcodes_error_handler (_("unknown privileged spec set by %s=%s"), |
8152e040 NC |
113 | option, value); |
114 | else if (default_priv_spec == PRIV_SPEC_CLASS_NONE) | |
115 | default_priv_spec = priv_spec; | |
116 | else if (default_priv_spec != priv_spec) | |
3d73d29e NC |
117 | { |
118 | RISCV_GET_PRIV_SPEC_NAME (name, default_priv_spec); | |
119 | opcodes_error_handler (_("mis-matched privilege spec set by %s=%s, " | |
120 | "the elf privilege attribute is %s"), | |
121 | option, value, name); | |
122 | } | |
8f595e9b | 123 | } |
e23eba97 NC |
124 | else |
125 | { | |
a6743a54 AM |
126 | /* xgettext:c-format */ |
127 | opcodes_error_handler (_("unrecognized disassembler option: %s"), option); | |
e23eba97 NC |
128 | } |
129 | } | |
130 | ||
131 | static void | |
132 | parse_riscv_dis_options (const char *opts_in) | |
133 | { | |
134 | char *opts = xstrdup (opts_in), *opt = opts, *opt_end = opts; | |
135 | ||
136 | set_default_riscv_dis_options (); | |
137 | ||
138 | for ( ; opt_end != NULL; opt = opt_end + 1) | |
139 | { | |
140 | if ((opt_end = strchr (opt, ',')) != NULL) | |
141 | *opt_end = 0; | |
142 | parse_riscv_dis_option (opt); | |
143 | } | |
144 | ||
145 | free (opts); | |
146 | } | |
147 | ||
148 | /* Print one argument from an array. */ | |
149 | ||
150 | static void | |
151 | arg_print (struct disassemble_info *info, unsigned long val, | |
152 | const char* const* array, size_t size) | |
153 | { | |
154 | const char *s = val >= size || array[val] == NULL ? "unknown" : array[val]; | |
155 | (*info->fprintf_func) (info->stream, "%s", s); | |
156 | } | |
157 | ||
158 | static void | |
c7dee848 JW |
159 | maybe_print_address (struct riscv_private_data *pd, int base_reg, int offset, |
160 | int wide) | |
e23eba97 NC |
161 | { |
162 | if (pd->hi_addr[base_reg] != (bfd_vma)-1) | |
163 | { | |
35fd2b2b | 164 | pd->print_addr = (base_reg != 0 ? pd->hi_addr[base_reg] : 0) + offset; |
e23eba97 NC |
165 | pd->hi_addr[base_reg] = -1; |
166 | } | |
167 | else if (base_reg == X_GP && pd->gp != (bfd_vma)-1) | |
168 | pd->print_addr = pd->gp + offset; | |
169 | else if (base_reg == X_TP || base_reg == 0) | |
170 | pd->print_addr = offset; | |
c7dee848 JW |
171 | |
172 | /* Sign-extend a 32-bit value to a 64-bit value. */ | |
173 | if (wide) | |
174 | pd->print_addr = (bfd_vma)(int32_t) pd->print_addr; | |
e23eba97 NC |
175 | } |
176 | ||
177 | /* Print insn arguments for 32/64-bit code. */ | |
178 | ||
179 | static void | |
180 | print_insn_args (const char *d, insn_t l, bfd_vma pc, disassemble_info *info) | |
181 | { | |
182 | struct riscv_private_data *pd = info->private_data; | |
183 | int rs1 = (l >> OP_SH_RS1) & OP_MASK_RS1; | |
184 | int rd = (l >> OP_SH_RD) & OP_MASK_RD; | |
185 | fprintf_ftype print = info->fprintf_func; | |
186 | ||
187 | if (*d != '\0') | |
188 | print (info->stream, "\t"); | |
189 | ||
190 | for (; *d != '\0'; d++) | |
191 | { | |
192 | switch (*d) | |
193 | { | |
194 | case 'C': /* RVC */ | |
195 | switch (*++d) | |
196 | { | |
dcd709e0 NC |
197 | case 's': /* RS1 x8-x15. */ |
198 | case 'w': /* RS1 x8-x15. */ | |
e23eba97 NC |
199 | print (info->stream, "%s", |
200 | riscv_gpr_names[EXTRACT_OPERAND (CRS1S, l) + 8]); | |
201 | break; | |
dcd709e0 NC |
202 | case 't': /* RS2 x8-x15. */ |
203 | case 'x': /* RS2 x8-x15. */ | |
e23eba97 NC |
204 | print (info->stream, "%s", |
205 | riscv_gpr_names[EXTRACT_OPERAND (CRS2S, l) + 8]); | |
206 | break; | |
dcd709e0 | 207 | case 'U': /* RS1, constrained to equal RD. */ |
e23eba97 NC |
208 | print (info->stream, "%s", riscv_gpr_names[rd]); |
209 | break; | |
dcd709e0 | 210 | case 'c': /* RS1, constrained to equal sp. */ |
e23eba97 NC |
211 | print (info->stream, "%s", riscv_gpr_names[X_SP]); |
212 | break; | |
213 | case 'V': /* RS2 */ | |
214 | print (info->stream, "%s", | |
215 | riscv_gpr_names[EXTRACT_OPERAND (CRS2, l)]); | |
216 | break; | |
f91d48de | 217 | case 'o': |
e23eba97 | 218 | case 'j': |
c7dee848 JW |
219 | if (((l & MASK_C_ADDI) == MATCH_C_ADDI) && rd != 0) |
220 | maybe_print_address (pd, rd, EXTRACT_CITYPE_IMM (l), 0); | |
221 | if (info->mach == bfd_mach_riscv64 | |
222 | && ((l & MASK_C_ADDIW) == MATCH_C_ADDIW) && rd != 0) | |
223 | maybe_print_address (pd, rd, EXTRACT_CITYPE_IMM (l), 1); | |
5a9f5403 | 224 | print (info->stream, "%d", (int)EXTRACT_CITYPE_IMM (l)); |
e23eba97 NC |
225 | break; |
226 | case 'k': | |
5a9f5403 | 227 | print (info->stream, "%d", (int)EXTRACT_CLTYPE_LW_IMM (l)); |
e23eba97 NC |
228 | break; |
229 | case 'l': | |
5a9f5403 | 230 | print (info->stream, "%d", (int)EXTRACT_CLTYPE_LD_IMM (l)); |
e23eba97 NC |
231 | break; |
232 | case 'm': | |
5a9f5403 | 233 | print (info->stream, "%d", (int)EXTRACT_CITYPE_LWSP_IMM (l)); |
e23eba97 NC |
234 | break; |
235 | case 'n': | |
5a9f5403 | 236 | print (info->stream, "%d", (int)EXTRACT_CITYPE_LDSP_IMM (l)); |
e23eba97 NC |
237 | break; |
238 | case 'K': | |
5a9f5403 | 239 | print (info->stream, "%d", (int)EXTRACT_CIWTYPE_ADDI4SPN_IMM (l)); |
e23eba97 NC |
240 | break; |
241 | case 'L': | |
5a9f5403 | 242 | print (info->stream, "%d", (int)EXTRACT_CITYPE_ADDI16SP_IMM (l)); |
e23eba97 NC |
243 | break; |
244 | case 'M': | |
5a9f5403 | 245 | print (info->stream, "%d", (int)EXTRACT_CSSTYPE_SWSP_IMM (l)); |
e23eba97 NC |
246 | break; |
247 | case 'N': | |
5a9f5403 | 248 | print (info->stream, "%d", (int)EXTRACT_CSSTYPE_SDSP_IMM (l)); |
e23eba97 NC |
249 | break; |
250 | case 'p': | |
5a9f5403 | 251 | info->target = EXTRACT_CBTYPE_IMM (l) + pc; |
e23eba97 NC |
252 | (*info->print_address_func) (info->target, info); |
253 | break; | |
254 | case 'a': | |
5a9f5403 | 255 | info->target = EXTRACT_CJTYPE_IMM (l) + pc; |
e23eba97 NC |
256 | (*info->print_address_func) (info->target, info); |
257 | break; | |
258 | case 'u': | |
259 | print (info->stream, "0x%x", | |
5a9f5403 | 260 | (int)(EXTRACT_CITYPE_IMM (l) & (RISCV_BIGIMM_REACH-1))); |
e23eba97 NC |
261 | break; |
262 | case '>': | |
5a9f5403 | 263 | print (info->stream, "0x%x", (int)EXTRACT_CITYPE_IMM (l) & 0x3f); |
e23eba97 NC |
264 | break; |
265 | case '<': | |
5a9f5403 | 266 | print (info->stream, "0x%x", (int)EXTRACT_CITYPE_IMM (l) & 0x1f); |
e23eba97 | 267 | break; |
dcd709e0 | 268 | case 'T': /* Floating-point RS2. */ |
e23eba97 NC |
269 | print (info->stream, "%s", |
270 | riscv_fpr_names[EXTRACT_OPERAND (CRS2, l)]); | |
271 | break; | |
dcd709e0 | 272 | case 'D': /* Floating-point RS2 x8-x15. */ |
e23eba97 NC |
273 | print (info->stream, "%s", |
274 | riscv_fpr_names[EXTRACT_OPERAND (CRS2S, l) + 8]); | |
275 | break; | |
276 | } | |
277 | break; | |
278 | ||
279 | case ',': | |
280 | case '(': | |
281 | case ')': | |
282 | case '[': | |
283 | case ']': | |
284 | print (info->stream, "%c", *d); | |
285 | break; | |
286 | ||
287 | case '0': | |
dcd709e0 | 288 | /* Only print constant 0 if it is the last argument. */ |
e23eba97 NC |
289 | if (!d[1]) |
290 | print (info->stream, "0"); | |
291 | break; | |
292 | ||
293 | case 'b': | |
294 | case 's': | |
35eeb78f | 295 | if ((l & MASK_JALR) == MATCH_JALR) |
c7dee848 | 296 | maybe_print_address (pd, rs1, 0, 0); |
e23eba97 NC |
297 | print (info->stream, "%s", riscv_gpr_names[rs1]); |
298 | break; | |
299 | ||
300 | case 't': | |
301 | print (info->stream, "%s", | |
302 | riscv_gpr_names[EXTRACT_OPERAND (RS2, l)]); | |
303 | break; | |
304 | ||
305 | case 'u': | |
306 | print (info->stream, "0x%x", | |
307 | (unsigned)EXTRACT_UTYPE_IMM (l) >> RISCV_IMM_BITS); | |
308 | break; | |
309 | ||
310 | case 'm': | |
311 | arg_print (info, EXTRACT_OPERAND (RM, l), | |
312 | riscv_rm, ARRAY_SIZE (riscv_rm)); | |
313 | break; | |
314 | ||
315 | case 'P': | |
316 | arg_print (info, EXTRACT_OPERAND (PRED, l), | |
317 | riscv_pred_succ, ARRAY_SIZE (riscv_pred_succ)); | |
318 | break; | |
319 | ||
320 | case 'Q': | |
321 | arg_print (info, EXTRACT_OPERAND (SUCC, l), | |
322 | riscv_pred_succ, ARRAY_SIZE (riscv_pred_succ)); | |
323 | break; | |
324 | ||
325 | case 'o': | |
c7dee848 | 326 | maybe_print_address (pd, rs1, EXTRACT_ITYPE_IMM (l), 0); |
b52d3cfc | 327 | /* Fall through. */ |
e23eba97 NC |
328 | case 'j': |
329 | if (((l & MASK_ADDI) == MATCH_ADDI && rs1 != 0) | |
330 | || (l & MASK_JALR) == MATCH_JALR) | |
c7dee848 JW |
331 | maybe_print_address (pd, rs1, EXTRACT_ITYPE_IMM (l), 0); |
332 | if (info->mach == bfd_mach_riscv64 | |
333 | && ((l & MASK_ADDIW) == MATCH_ADDIW) && rs1 != 0) | |
334 | maybe_print_address (pd, rs1, EXTRACT_ITYPE_IMM (l), 1); | |
e23eba97 NC |
335 | print (info->stream, "%d", (int)EXTRACT_ITYPE_IMM (l)); |
336 | break; | |
337 | ||
338 | case 'q': | |
c7dee848 | 339 | maybe_print_address (pd, rs1, EXTRACT_STYPE_IMM (l), 0); |
e23eba97 NC |
340 | print (info->stream, "%d", (int)EXTRACT_STYPE_IMM (l)); |
341 | break; | |
342 | ||
343 | case 'a': | |
5a9f5403 | 344 | info->target = EXTRACT_JTYPE_IMM (l) + pc; |
e23eba97 NC |
345 | (*info->print_address_func) (info->target, info); |
346 | break; | |
347 | ||
348 | case 'p': | |
5a9f5403 | 349 | info->target = EXTRACT_BTYPE_IMM (l) + pc; |
e23eba97 NC |
350 | (*info->print_address_func) (info->target, info); |
351 | break; | |
352 | ||
353 | case 'd': | |
354 | if ((l & MASK_AUIPC) == MATCH_AUIPC) | |
355 | pd->hi_addr[rd] = pc + EXTRACT_UTYPE_IMM (l); | |
356 | else if ((l & MASK_LUI) == MATCH_LUI) | |
357 | pd->hi_addr[rd] = EXTRACT_UTYPE_IMM (l); | |
358 | else if ((l & MASK_C_LUI) == MATCH_C_LUI) | |
5a9f5403 | 359 | pd->hi_addr[rd] = EXTRACT_CITYPE_LUI_IMM (l); |
e23eba97 NC |
360 | print (info->stream, "%s", riscv_gpr_names[rd]); |
361 | break; | |
362 | ||
363 | case 'z': | |
364 | print (info->stream, "%s", riscv_gpr_names[0]); | |
365 | break; | |
366 | ||
367 | case '>': | |
368 | print (info->stream, "0x%x", (int)EXTRACT_OPERAND (SHAMT, l)); | |
369 | break; | |
370 | ||
371 | case '<': | |
372 | print (info->stream, "0x%x", (int)EXTRACT_OPERAND (SHAMTW, l)); | |
373 | break; | |
374 | ||
375 | case 'S': | |
376 | case 'U': | |
377 | print (info->stream, "%s", riscv_fpr_names[rs1]); | |
378 | break; | |
379 | ||
380 | case 'T': | |
381 | print (info->stream, "%s", riscv_fpr_names[EXTRACT_OPERAND (RS2, l)]); | |
382 | break; | |
383 | ||
384 | case 'D': | |
385 | print (info->stream, "%s", riscv_fpr_names[rd]); | |
386 | break; | |
387 | ||
388 | case 'R': | |
389 | print (info->stream, "%s", riscv_fpr_names[EXTRACT_OPERAND (RS3, l)]); | |
390 | break; | |
391 | ||
392 | case 'E': | |
393 | { | |
dcd709e0 | 394 | static const char *riscv_csr_hash[4096]; /* Total 2^12 CSRs. */ |
78933a4a | 395 | static bool init_csr = false; |
e23eba97 | 396 | unsigned int csr = EXTRACT_OPERAND (CSR, l); |
8f595e9b NC |
397 | |
398 | if (!init_csr) | |
e23eba97 | 399 | { |
8f595e9b NC |
400 | unsigned int i; |
401 | for (i = 0; i < 4096; i++) | |
402 | riscv_csr_hash[i] = NULL; | |
403 | ||
dcd709e0 | 404 | /* Set to the newest privileged version. */ |
8f595e9b NC |
405 | if (default_priv_spec == PRIV_SPEC_CLASS_NONE) |
406 | default_priv_spec = PRIV_SPEC_CLASS_DRAFT - 1; | |
407 | ||
08ccfccf NC |
408 | #define DECLARE_CSR(name, num, class, define_version, abort_version) \ |
409 | if (riscv_csr_hash[num] == NULL \ | |
410 | && ((define_version == PRIV_SPEC_CLASS_NONE \ | |
411 | && abort_version == PRIV_SPEC_CLASS_NONE) \ | |
412 | || (default_priv_spec >= define_version \ | |
413 | && default_priv_spec < abort_version))) \ | |
8f595e9b NC |
414 | riscv_csr_hash[num] = #name; |
415 | #define DECLARE_CSR_ALIAS(name, num, class, define_version, abort_version) \ | |
416 | DECLARE_CSR (name, num, class, define_version, abort_version) | |
e23eba97 NC |
417 | #include "opcode/riscv-opc.h" |
418 | #undef DECLARE_CSR | |
419 | } | |
8f595e9b NC |
420 | |
421 | if (riscv_csr_hash[csr] != NULL) | |
422 | print (info->stream, "%s", riscv_csr_hash[csr]); | |
e23eba97 NC |
423 | else |
424 | print (info->stream, "0x%x", csr); | |
425 | break; | |
426 | } | |
427 | ||
428 | case 'Z': | |
429 | print (info->stream, "%d", rs1); | |
430 | break; | |
431 | ||
432 | default: | |
433 | /* xgettext:c-format */ | |
434 | print (info->stream, _("# internal error, undefined modifier (%c)"), | |
435 | *d); | |
436 | return; | |
437 | } | |
438 | } | |
439 | } | |
440 | ||
441 | /* Print the RISC-V instruction at address MEMADDR in debugged memory, | |
442 | on using INFO. Returns length of the instruction, in bytes. | |
443 | BIGENDIAN must be 1 if this is big-endian code, 0 if | |
444 | this is little-endian code. */ | |
445 | ||
446 | static int | |
447 | riscv_disassemble_insn (bfd_vma memaddr, insn_t word, disassemble_info *info) | |
448 | { | |
449 | const struct riscv_opcode *op; | |
78933a4a | 450 | static bool init = 0; |
e23eba97 NC |
451 | static const struct riscv_opcode *riscv_hash[OP_MASK_OP + 1]; |
452 | struct riscv_private_data *pd; | |
453 | int insnlen; | |
454 | ||
455 | #define OP_HASH_IDX(i) ((i) & (riscv_insn_length (i) == 2 ? 0x3 : OP_MASK_OP)) | |
456 | ||
457 | /* Build a hash table to shorten the search time. */ | |
458 | if (! init) | |
459 | { | |
460 | for (op = riscv_opcodes; op->name; op++) | |
461 | if (!riscv_hash[OP_HASH_IDX (op->match)]) | |
462 | riscv_hash[OP_HASH_IDX (op->match)] = op; | |
463 | ||
464 | init = 1; | |
465 | } | |
466 | ||
467 | if (info->private_data == NULL) | |
468 | { | |
469 | int i; | |
470 | ||
471 | pd = info->private_data = xcalloc (1, sizeof (struct riscv_private_data)); | |
472 | pd->gp = -1; | |
473 | pd->print_addr = -1; | |
474 | for (i = 0; i < (int)ARRAY_SIZE (pd->hi_addr); i++) | |
475 | pd->hi_addr[i] = -1; | |
476 | ||
477 | for (i = 0; i < info->symtab_size; i++) | |
b5292032 | 478 | if (strcmp (bfd_asymbol_name (info->symtab[i]), RISCV_GP_SYMBOL) == 0) |
e23eba97 NC |
479 | pd->gp = bfd_asymbol_value (info->symtab[i]); |
480 | } | |
481 | else | |
482 | pd = info->private_data; | |
483 | ||
484 | insnlen = riscv_insn_length (word); | |
485 | ||
d7560e2d JW |
486 | /* RISC-V instructions are always little-endian. */ |
487 | info->endian_code = BFD_ENDIAN_LITTLE; | |
488 | ||
e23eba97 NC |
489 | info->bytes_per_chunk = insnlen % 4 == 0 ? 4 : 2; |
490 | info->bytes_per_line = 8; | |
d7560e2d JW |
491 | /* We don't support constant pools, so this must be code. */ |
492 | info->display_endian = info->endian_code; | |
e23eba97 NC |
493 | info->insn_info_valid = 1; |
494 | info->branch_delay_insns = 0; | |
495 | info->data_size = 0; | |
496 | info->insn_type = dis_nonbranch; | |
497 | info->target = 0; | |
498 | info->target2 = 0; | |
499 | ||
500 | op = riscv_hash[OP_HASH_IDX (word)]; | |
501 | if (op != NULL) | |
502 | { | |
1080bf78 | 503 | unsigned xlen = 0; |
e23eba97 | 504 | |
2922d21d AW |
505 | /* If XLEN is not known, get its value from the ELF class. */ |
506 | if (info->mach == bfd_mach_riscv64) | |
507 | xlen = 64; | |
508 | else if (info->mach == bfd_mach_riscv32) | |
509 | xlen = 32; | |
510 | else if (info->section != NULL) | |
e23eba97 NC |
511 | { |
512 | Elf_Internal_Ehdr *ehdr = elf_elfheader (info->section->owner); | |
513 | xlen = ehdr->e_ident[EI_CLASS] == ELFCLASS64 ? 64 : 32; | |
514 | } | |
515 | ||
516 | for (; op->name; op++) | |
517 | { | |
518 | /* Does the opcode match? */ | |
519 | if (! (op->match_func) (op, word)) | |
520 | continue; | |
521 | /* Is this a pseudo-instruction and may we print it as such? */ | |
522 | if (no_aliases && (op->pinfo & INSN_ALIAS)) | |
523 | continue; | |
524 | /* Is this instruction restricted to a certain value of XLEN? */ | |
43135d3b | 525 | if ((op->xlen_requirement != 0) && (op->xlen_requirement != xlen)) |
e23eba97 NC |
526 | continue; |
527 | ||
528 | /* It's a match. */ | |
529 | (*info->fprintf_func) (info->stream, "%s", op->name); | |
530 | print_insn_args (op->args, word, memaddr, info); | |
531 | ||
532 | /* Try to disassemble multi-instruction addressing sequences. */ | |
533 | if (pd->print_addr != (bfd_vma)-1) | |
534 | { | |
535 | info->target = pd->print_addr; | |
536 | (*info->fprintf_func) (info->stream, " # "); | |
537 | (*info->print_address_func) (info->target, info); | |
538 | pd->print_addr = -1; | |
539 | } | |
540 | ||
eb41b248 JW |
541 | /* Finish filling out insn_info fields. */ |
542 | switch (op->pinfo & INSN_TYPE) | |
543 | { | |
544 | case INSN_BRANCH: | |
545 | info->insn_type = dis_branch; | |
546 | break; | |
547 | case INSN_CONDBRANCH: | |
548 | info->insn_type = dis_condbranch; | |
549 | break; | |
550 | case INSN_JSR: | |
551 | info->insn_type = dis_jsr; | |
552 | break; | |
553 | case INSN_DREF: | |
554 | info->insn_type = dis_dref; | |
555 | break; | |
556 | default: | |
557 | break; | |
558 | } | |
559 | ||
560 | if (op->pinfo & INSN_DATA_SIZE) | |
561 | { | |
562 | int size = ((op->pinfo & INSN_DATA_SIZE) | |
563 | >> INSN_DATA_SIZE_SHIFT); | |
564 | info->data_size = 1 << (size - 1); | |
565 | } | |
566 | ||
e23eba97 NC |
567 | return insnlen; |
568 | } | |
569 | } | |
570 | ||
571 | /* We did not find a match, so just print the instruction bits. */ | |
572 | info->insn_type = dis_noninsn; | |
6a7f5766 AB |
573 | switch (insnlen) |
574 | { | |
575 | case 2: | |
576 | case 4: | |
577 | case 8: | |
578 | (*info->fprintf_func) (info->stream, ".%dbyte\t0x%llx", | |
579 | insnlen, (unsigned long long) word); | |
580 | break; | |
581 | default: | |
582 | { | |
583 | int i; | |
584 | (*info->fprintf_func) (info->stream, ".byte\t"); | |
585 | for (i = 0; i < insnlen; ++i) | |
586 | { | |
587 | if (i > 0) | |
588 | (*info->fprintf_func) (info->stream, ", "); | |
589 | (*info->fprintf_func) (info->stream, "0x%02x", | |
590 | (unsigned int) (word & 0xff)); | |
591 | word >>= 8; | |
592 | } | |
593 | } | |
594 | break; | |
595 | } | |
e23eba97 NC |
596 | return insnlen; |
597 | } | |
598 | ||
9b9b1092 NC |
599 | /* Return true if we find the suitable mapping symbol, |
600 | and also update the STATE. Otherwise, return false. */ | |
601 | ||
602 | static bool | |
603 | riscv_get_map_state (int n, | |
604 | enum riscv_seg_mstate *state, | |
605 | struct disassemble_info *info) | |
606 | { | |
607 | const char *name; | |
608 | ||
609 | /* If the symbol is in a different section, ignore it. */ | |
610 | if (info->section != NULL | |
611 | && info->section != info->symtab[n]->section) | |
612 | return false; | |
613 | ||
614 | name = bfd_asymbol_name(info->symtab[n]); | |
615 | if (strcmp (name, "$x") == 0) | |
616 | *state = MAP_INSN; | |
617 | else if (strcmp (name, "$d") == 0) | |
618 | *state = MAP_DATA; | |
619 | else | |
620 | return false; | |
621 | ||
622 | return true; | |
623 | } | |
624 | ||
625 | /* Check the sorted symbol table (sorted by the symbol value), find the | |
626 | suitable mapping symbols. */ | |
627 | ||
628 | static enum riscv_seg_mstate | |
629 | riscv_search_mapping_symbol (bfd_vma memaddr, | |
630 | struct disassemble_info *info) | |
631 | { | |
632 | enum riscv_seg_mstate mstate; | |
633 | bool from_last_map_symbol; | |
634 | bool found = false; | |
635 | int symbol = -1; | |
636 | int n; | |
637 | ||
638 | /* Decide whether to print the data or instruction by default, in case | |
639 | we can not find the corresponding mapping symbols. */ | |
640 | mstate = MAP_DATA; | |
641 | if ((info->section | |
642 | && info->section->flags & SEC_CODE) | |
643 | || !info->section) | |
644 | mstate = MAP_INSN; | |
645 | ||
646 | if (info->symtab_size == 0 | |
647 | || bfd_asymbol_flavour (*info->symtab) != bfd_target_elf_flavour) | |
648 | return mstate; | |
649 | ||
650 | /* Reset the last_map_symbol if we start to dump a new section. */ | |
651 | if (memaddr <= 0) | |
652 | last_map_symbol = -1; | |
653 | ||
654 | /* If the last stop offset is different from the current one, then | |
655 | don't use the last_map_symbol to search. We usually reset the | |
656 | info->stop_offset when handling a new section. */ | |
657 | from_last_map_symbol = (last_map_symbol >= 0 | |
658 | && info->stop_offset == last_stop_offset); | |
659 | ||
660 | /* Start scanning at the start of the function, or wherever | |
661 | we finished last time. */ | |
662 | n = info->symtab_pos + 1; | |
663 | if (from_last_map_symbol && n >= last_map_symbol) | |
664 | n = last_map_symbol; | |
665 | ||
666 | /* Find the suitable mapping symbol to dump. */ | |
667 | for (; n < info->symtab_size; n++) | |
668 | { | |
669 | bfd_vma addr = bfd_asymbol_value (info->symtab[n]); | |
670 | /* We have searched all possible symbols in the range. */ | |
671 | if (addr > memaddr) | |
672 | break; | |
673 | if (riscv_get_map_state (n, &mstate, info)) | |
674 | { | |
675 | symbol = n; | |
676 | found = true; | |
677 | /* Do not stop searching, in case there are some mapping | |
678 | symbols have the same value, but have different names. | |
679 | Use the last one. */ | |
680 | } | |
681 | } | |
682 | ||
683 | /* We can not find the suitable mapping symbol above. Therefore, we | |
684 | look forwards and try to find it again, but don't go pass the start | |
685 | of the section. Otherwise a data section without mapping symbols | |
686 | can pick up a text mapping symbol of a preceeding section. */ | |
687 | if (!found) | |
688 | { | |
689 | n = info->symtab_pos; | |
690 | if (from_last_map_symbol && n >= last_map_symbol) | |
691 | n = last_map_symbol; | |
692 | ||
693 | for (; n >= 0; n--) | |
694 | { | |
695 | bfd_vma addr = bfd_asymbol_value (info->symtab[n]); | |
696 | /* We have searched all possible symbols in the range. */ | |
697 | if (addr < (info->section ? info->section->vma : 0)) | |
698 | break; | |
699 | /* Stop searching once we find the closed mapping symbol. */ | |
700 | if (riscv_get_map_state (n, &mstate, info)) | |
701 | { | |
702 | symbol = n; | |
703 | found = true; | |
704 | break; | |
705 | } | |
706 | } | |
707 | } | |
708 | ||
709 | /* Save the information for next use. */ | |
710 | last_map_symbol = symbol; | |
711 | last_stop_offset = info->stop_offset; | |
712 | ||
713 | return mstate; | |
714 | } | |
715 | ||
716 | /* Decide which data size we should print. */ | |
717 | ||
718 | static bfd_vma | |
719 | riscv_data_length (bfd_vma memaddr, | |
720 | disassemble_info *info) | |
721 | { | |
722 | bfd_vma length; | |
723 | bool found = false; | |
724 | ||
725 | length = 4; | |
726 | if (info->symtab_size != 0 | |
727 | && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour | |
728 | && last_map_symbol >= 0) | |
729 | { | |
730 | int n; | |
731 | enum riscv_seg_mstate m = MAP_NONE; | |
732 | for (n = last_map_symbol + 1; n < info->symtab_size; n++) | |
733 | { | |
734 | bfd_vma addr = bfd_asymbol_value (info->symtab[n]); | |
735 | if (addr > memaddr | |
736 | && riscv_get_map_state (n, &m, info)) | |
737 | { | |
738 | if (addr - memaddr < length) | |
739 | length = addr - memaddr; | |
740 | found = true; | |
741 | break; | |
742 | } | |
743 | } | |
744 | } | |
745 | if (!found) | |
746 | { | |
747 | /* Do not set the length which exceeds the section size. */ | |
748 | bfd_vma offset = info->section->vma + info->section->size; | |
749 | offset -= memaddr; | |
750 | length = (offset < length) ? offset : length; | |
751 | } | |
752 | length = length == 3 ? 2 : length; | |
753 | return length; | |
754 | } | |
755 | ||
756 | /* Dump the data contents. */ | |
757 | ||
758 | static int | |
759 | riscv_disassemble_data (bfd_vma memaddr ATTRIBUTE_UNUSED, | |
760 | insn_t data, | |
761 | disassemble_info *info) | |
762 | { | |
763 | info->display_endian = info->endian; | |
764 | ||
765 | switch (info->bytes_per_chunk) | |
766 | { | |
767 | case 1: | |
768 | info->bytes_per_line = 6; | |
769 | (*info->fprintf_func) (info->stream, ".byte\t0x%02llx", | |
770 | (unsigned long long) data); | |
771 | break; | |
772 | case 2: | |
773 | info->bytes_per_line = 8; | |
774 | (*info->fprintf_func) (info->stream, ".short\t0x%04llx", | |
775 | (unsigned long long) data); | |
776 | break; | |
777 | case 4: | |
778 | info->bytes_per_line = 8; | |
779 | (*info->fprintf_func) (info->stream, ".word\t0x%08llx", | |
780 | (unsigned long long) data); | |
781 | break; | |
782 | case 8: | |
783 | info->bytes_per_line = 8; | |
784 | (*info->fprintf_func) (info->stream, ".dword\t0x%016llx", | |
785 | (unsigned long long) data); | |
786 | break; | |
787 | default: | |
788 | abort (); | |
789 | } | |
790 | return info->bytes_per_chunk; | |
791 | } | |
792 | ||
e23eba97 NC |
793 | int |
794 | print_insn_riscv (bfd_vma memaddr, struct disassemble_info *info) | |
795 | { | |
9b9b1092 | 796 | bfd_byte packet[8]; |
e23eba97 | 797 | insn_t insn = 0; |
9b9b1092 | 798 | bfd_vma dump_size; |
e23eba97 | 799 | int status; |
9b9b1092 NC |
800 | enum riscv_seg_mstate mstate; |
801 | int (*riscv_disassembler) (bfd_vma, insn_t, struct disassemble_info *); | |
e23eba97 NC |
802 | |
803 | if (info->disassembler_options != NULL) | |
804 | { | |
805 | parse_riscv_dis_options (info->disassembler_options); | |
806 | /* Avoid repeatedly parsing the options. */ | |
807 | info->disassembler_options = NULL; | |
808 | } | |
809 | else if (riscv_gpr_names == NULL) | |
810 | set_default_riscv_dis_options (); | |
811 | ||
9b9b1092 NC |
812 | mstate = riscv_search_mapping_symbol (memaddr, info); |
813 | /* Save the last mapping state. */ | |
814 | last_map_state = mstate; | |
815 | ||
816 | /* Set the size to dump. */ | |
817 | if (mstate == MAP_DATA | |
818 | && (info->flags & DISASSEMBLE_DATA) == 0) | |
819 | { | |
820 | dump_size = riscv_data_length (memaddr, info); | |
821 | info->bytes_per_chunk = dump_size; | |
822 | riscv_disassembler = riscv_disassemble_data; | |
823 | } | |
824 | else | |
e23eba97 | 825 | { |
9b9b1092 NC |
826 | /* Get the first 2-bytes to check the lenghth of instruction. */ |
827 | status = (*info->read_memory_func) (memaddr, packet, 2, info); | |
e23eba97 NC |
828 | if (status != 0) |
829 | { | |
e23eba97 | 830 | (*info->memory_error_func) (status, memaddr, info); |
685bb4e8 | 831 | return status; |
e23eba97 | 832 | } |
9b9b1092 NC |
833 | insn = (insn_t) bfd_getl16 (packet); |
834 | dump_size = riscv_insn_length (insn); | |
835 | riscv_disassembler = riscv_disassemble_insn; | |
836 | } | |
e23eba97 | 837 | |
9b9b1092 NC |
838 | /* Fetch the instruction to dump. */ |
839 | status = (*info->read_memory_func) (memaddr, packet, dump_size, info); | |
840 | if (status != 0) | |
841 | { | |
842 | (*info->memory_error_func) (status, memaddr, info); | |
685bb4e8 | 843 | return status; |
e23eba97 | 844 | } |
9b9b1092 | 845 | insn = (insn_t) bfd_get_bits (packet, dump_size * 8, false); |
e23eba97 | 846 | |
9b9b1092 | 847 | return (*riscv_disassembler) (memaddr, insn, info); |
e23eba97 NC |
848 | } |
849 | ||
8152e040 NC |
850 | disassembler_ftype |
851 | riscv_get_disassembler (bfd *abfd) | |
852 | { | |
8152e040 NC |
853 | if (abfd) |
854 | { | |
113bb761 JN |
855 | const struct elf_backend_data *ebd = get_elf_backend_data (abfd); |
856 | if (ebd) | |
8152e040 | 857 | { |
113bb761 JN |
858 | const char *sec_name = ebd->obj_attrs_section; |
859 | if (bfd_get_section_by_name (abfd, sec_name) != NULL) | |
860 | { | |
861 | obj_attribute *attr = elf_known_obj_attributes_proc (abfd); | |
862 | unsigned int Tag_a = Tag_RISCV_priv_spec; | |
863 | unsigned int Tag_b = Tag_RISCV_priv_spec_minor; | |
864 | unsigned int Tag_c = Tag_RISCV_priv_spec_revision; | |
865 | riscv_get_priv_spec_class_from_numbers (attr[Tag_a].i, | |
866 | attr[Tag_b].i, | |
867 | attr[Tag_c].i, | |
868 | &default_priv_spec); | |
869 | } | |
8152e040 NC |
870 | } |
871 | } | |
872 | return print_insn_riscv; | |
873 | } | |
874 | ||
884b49e3 AB |
875 | /* Prevent use of the fake labels that are generated as part of the DWARF |
876 | and for relaxable relocations in the assembler. */ | |
877 | ||
78933a4a | 878 | bool |
884b49e3 AB |
879 | riscv_symbol_is_valid (asymbol * sym, |
880 | struct disassemble_info * info ATTRIBUTE_UNUSED) | |
881 | { | |
882 | const char * name; | |
883 | ||
884 | if (sym == NULL) | |
78933a4a | 885 | return false; |
884b49e3 AB |
886 | |
887 | name = bfd_asymbol_name (sym); | |
888 | ||
9b9b1092 NC |
889 | return (strcmp (name, RISCV_FAKE_LABEL_NAME) != 0 |
890 | && !riscv_elf_is_mapping_symbols (name)); | |
884b49e3 AB |
891 | } |
892 | ||
e23eba97 NC |
893 | void |
894 | print_riscv_disassembler_options (FILE *stream) | |
895 | { | |
896 | fprintf (stream, _("\n\ | |
897 | The following RISC-V-specific disassembler options are supported for use\n\ | |
898 | with the -M switch (multiple options should be separated by commas):\n")); | |
899 | ||
900 | fprintf (stream, _("\n\ | |
8f595e9b NC |
901 | numeric Print numeric register names, rather than ABI names.\n")); |
902 | ||
903 | fprintf (stream, _("\n\ | |
904 | no-aliases Disassemble only into canonical instructions, rather\n\ | |
905 | than into pseudoinstructions.\n")); | |
e23eba97 NC |
906 | |
907 | fprintf (stream, _("\n\ | |
8f595e9b NC |
908 | priv-spec=PRIV Print the CSR according to the chosen privilege spec\n\ |
909 | (1.9, 1.9.1, 1.10, 1.11).\n")); | |
e23eba97 NC |
910 | |
911 | fprintf (stream, _("\n")); | |
912 | } |