451ab91e |
1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
2 | * Mupen64plus -- dbg_decoder.c * |
3 | * Copyright (c) 2010 Marshall B. Rogers <mbr@64.vg> * |
4 | * http://64.vg/ * |
5 | * * |
6 | * This program is free software; you can redistribute it and/or modify * |
7 | * it under the terms of the GNU General Public License as published by * |
8 | * the Free Software Foundation; either version 2 of the License, or * |
9 | * (at your option) any later version. * |
10 | * * |
11 | * This program is distributed in the hope that it will be useful, * |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
14 | * GNU General Public License for more details. * |
15 | * * |
16 | * You should have received a copy of the GNU General Public License * |
17 | * along with this program; if not, write to the * |
18 | * Free Software Foundation, Inc., * |
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
21 | |
22 | /* |
23 | * This is a heavily modified reentrant version of the MIPS disassembler found |
24 | * in the NetBSD operating system. I chose to use this as a base due to the |
25 | * small, compact, and easily manageable code. |
26 | * |
27 | * Original copyright/license information is contained below. |
28 | */ |
29 | |
30 | /* $NetBSD: db_disasm.c,v 1.21 2009/12/14 00:46:06 matt Exp $ */ |
31 | |
32 | /*- |
33 | * Copyright (c) 1991, 1993 |
34 | * The Regents of the University of California. All rights reserved. |
35 | * |
36 | * This code is derived from software contributed to Berkeley by |
37 | * Ralph Campbell. |
38 | * |
39 | * Redistribution and use in source and binary forms, with or without |
40 | * modification, are permitted provided that the following conditions |
41 | * are met: |
42 | * 1. Redistributions of source code must retain the above copyright |
43 | * notice, this list of conditions and the following disclaimer. |
44 | * 2. Redistributions in binary form must reproduce the above copyright |
45 | * notice, this list of conditions and the following disclaimer in the |
46 | * documentation and/or other materials provided with the distribution. |
47 | * 3. Neither the name of the University nor the names of its contributors |
48 | * may be used to endorse or promote products derived from this software |
49 | * without specific prior written permission. |
50 | * |
51 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
52 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
53 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
54 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
55 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
56 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
57 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
58 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
59 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
60 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
61 | * SUCH DAMAGE. |
62 | * |
63 | * from: @(#)kadb.c 8.1 (Berkeley) 6/10/93 |
64 | */ |
65 | #include <stdio.h> |
66 | #include <stdarg.h> |
67 | #include <string.h> |
68 | #include <stdlib.h> |
69 | #ifndef MIPS32 |
70 | #define MIPS32 |
71 | #endif |
72 | #include "dbg_decoder.h" |
73 | #include "dbg_decoder_local.h" |
74 | #include "osal/preproc.h" |
75 | |
76 | |
77 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
78 | Data types |
79 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
80 | |
81 | typedef uint32_t db_addr_t; |
82 | |
83 | |
84 | |
85 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
86 | Local variables |
87 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
88 | |
89 | static const char * const r4k_str_op_name[64] = |
90 | { |
91 | /* 0 */ "spec", "bcond","j", "jal", "beq", "bne", "blez", "bgtz", |
92 | /* 8 */ "addi", "addiu","slti", "sltiu","andi", "ori", "xori", "lui", |
93 | /*16 */ "cop0", "cop1", "cop2", "cop3", "beql", "bnel", "blezl","bgtzl", |
94 | /*24 */ "daddi","daddiu","ldl", "ldr", "op34", "op35", "op36", "op37", |
95 | /*32 */ "lb", "lh", "lwl", "lw", "lbu", "lhu", "lwr", "lwu", |
96 | /*40 */ "sb", "sh", "swl", "sw", "sdl", "sdr", "swr", "cache", |
97 | /*48 */ "ll", "lwc1", "lwc2", "lwc3", "lld", "ldc1", "ldc2", "ld", |
98 | /*56 */ "sc", "swc1", "swc2", "swc3", "scd", "sdc1", "sdc2", "sd" |
99 | }; |
100 | |
101 | static const char * const r4k_str_spec_name[64] = |
102 | { |
103 | /* 0 */ "sll", "spec01","srl", "sra", "sllv", "spec05","srlv","srav", |
104 | /* 8 */ "jr", "jalr", "spec12","spec13","syscall","break","spec16","sync", |
105 | /*16 */ "mfhi", "mthi", "mflo", "mtlo", "dsllv","spec25","dsrlv","dsrav", |
106 | /*24 */ "mult", "multu","div", "divu", "dmult","dmultu","ddiv","ddivu", |
107 | /*32 */ "add", "addu", "sub", "subu", "and", "or", "xor", "nor", |
108 | /*40 */ "spec50","spec51","slt","sltu", "dadd","daddu","dsub","dsubu", |
109 | /*48 */ "tge","tgeu","tlt","tltu","teq","spec65","tne","spec67", |
110 | /*56 */ "dsll","spec71","dsrl","dsra","dsll32","spec75","dsrl32","dsra32" |
111 | }; |
112 | |
113 | static const char * const r4k_str_spec2_name[4] = /* QED RM4650, R5000, etc. */ |
114 | { |
115 | /* 0 */ "mad", "madu", "mul", "spec3" |
116 | }; |
117 | |
118 | static const char * const r4k_str_bcond_name[32] = |
119 | { |
120 | /* 0 */ "bltz", "bgez", "bltzl", "bgezl", "?", "?", "?", "?", |
121 | /* 8 */ "tgei", "tgeiu", "tlti", "tltiu", "teqi", "?", "tnei", "?", |
122 | /*16 */ "bltzal", "bgezal", "bltzall", "bgezall", "?", "?", "?", "?", |
123 | /*24 */ "?", "?", "?", "?", "?", "?", "?", "?", |
124 | }; |
125 | |
126 | static const char * const r4k_str_cop1_name[64] = |
127 | { |
128 | /* 0 */ "add", "sub", "mul", "div", "sqrt","abs", "mov", "neg", |
129 | /* 8 */ "fop08", "trunc.l","fop0a","fop0b","fop0c","trunc.w","fop0e","fop0f", |
130 | /*16 */ "fop10", "fop11","fop12","fop13","fop14","fop15","fop16","fop17", |
131 | /*24 */ "fop18", "fop19","fop1a","fop1b","fop1c","fop1d","fop1e","fop1f", |
132 | /*32 */ "cvt.s", "cvt.d","fop22","fop23","cvt.w","cvt.l","fop26","fop27", |
133 | /*40 */ "fop28", "fop29","fop2a","fop2b","fop2c","fop2d","fop2e","fop2f", |
134 | /*48 */ "c.f", "c.un","c.eq","c.ueq","c.olt","c.ult", |
135 | "c.ole", "c.ule", |
136 | /*56 */ "c.sf", "c.ngle","c.seq","c.ngl","c.lt","c.nge", |
137 | "c.le", "c.ngt" |
138 | }; |
139 | |
140 | static const char * const r4k_str_fmt_name[16] = |
141 | { |
142 | |
143 | "s", "d", "e", "fmt3", |
144 | "w", "l", "fmt6", "fmt7", |
145 | "fmt8", "fmt9", "fmta", "fmtb", |
146 | "fmtc", "fmtd", "fmte", "fmtf" |
147 | }; |
148 | |
149 | |
150 | static const char * const r4k_str_reg_name[32] = |
151 | { |
152 | "$zero", "$at", "v0", "v1", "a0", "a1", "a2", "a3", |
153 | "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", |
154 | "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
155 | "t8", "t9", "k0", "k1", "$gp", "$sp", "s8", "$ra" |
156 | }; |
157 | |
158 | static const char * const r4k_str_c0_opname[64] = |
159 | { |
160 | "c0op00","tlbr", "tlbwi", "c0op03","c0op04","c0op05","tlbwr", "c0op07", |
161 | "tlbp", "c0op11","c0op12","c0op13","c0op14","c0op15","c0op16","c0op17", |
162 | "rfe", "c0op21","c0op22","c0op23","c0op24","c0op25","c0op26","c0op27", |
163 | "eret", "c0op31","c0op32","c0op33","c0op34","c0op35","c0op36","c0op37", |
164 | "c0op40","c0op41","c0op42","c0op43","c0op44","c0op45","c0op46","c0op47", |
165 | "c0op50","c0op51","c0op52","c0op53","c0op54","c0op55","c0op56","c0op57", |
166 | "c0op60","c0op61","c0op62","c0op63","c0op64","c0op65","c0op66","c0op67", |
167 | "c0op70","c0op71","c0op72","c0op73","c0op74","c0op75","c0op77","c0op77", |
168 | }; |
169 | |
170 | static const char * const r4k_str_c0_reg[32] = |
171 | { |
172 | "C0_INX", "C0_RAND", "C0_ENTRYLO0", "C0_ENTRYLO1", |
173 | "C0_CONTEXT", "C0_PAGEMASK", "C0_WIRED", "cp0r7", |
174 | "C0_BADVADDR", "C0_COUNT", "C0_ENTRYHI", "C0_COMPARE", |
175 | "C0_SR", "C0_CAUSE", "C0_EPC", "C0_PRID", |
176 | "C0_CONFIG", "C0_LLADDR", "C0_WATCHLO", "C0_WATCHHI", |
177 | "xcontext", "cp0r21", "cp0r22", "debug", |
178 | "depc", "perfcnt", "C0_ECC", "C0_CACHE_ERR", |
179 | "C0_TAGLO", "C0_TAGHI", "C0_ERROR_EPC", "desave" |
180 | }; |
181 | |
182 | |
183 | |
184 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
185 | Local functions - lookup |
186 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
187 | |
188 | /* Look up a symbol */ |
189 | static char * |
190 | lookup_sym ( struct r4k_dis_t * state, |
191 | uint32_t address ) |
192 | { |
193 | if( state->lookup_sym ) |
194 | return state->lookup_sym( address, state->lookup_sym_d ); |
195 | |
196 | return NULL; |
197 | } |
198 | |
199 | /* Look up an upper 16-bits relocation */ |
200 | static char * |
201 | lookup_rel_hi16 ( struct r4k_dis_t * state, |
202 | uint32_t address ) |
203 | { |
204 | if( state->lookup_rel_hi16 ) |
205 | return state->lookup_rel_hi16( address, state->lookup_rel_hi16_d ); |
206 | |
207 | return NULL; |
208 | } |
209 | |
210 | /* Look up a lower 16-bits relocation */ |
211 | static char * |
212 | lookup_rel_lo16 ( struct r4k_dis_t * state, |
213 | uint32_t address ) |
214 | { |
215 | if( state->lookup_rel_lo16 ) |
216 | return state->lookup_rel_lo16( address, state->lookup_rel_lo16_d ); |
217 | |
218 | return NULL; |
219 | } |
220 | |
221 | |
222 | |
223 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
224 | Local functions - disassembler |
225 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
226 | |
227 | /* Print text into the destination buffer */ |
228 | static int |
229 | db_printf ( struct r4k_dis_t * state, |
230 | char * fmt, |
231 | ... ) |
232 | { |
233 | int l; |
234 | va_list ap; |
235 | char buffer[1024]; |
236 | |
237 | |
238 | /* Prepare user provided */ |
239 | va_start( ap, fmt ); |
240 | l = vsnprintf( buffer, sizeof(buffer), fmt, ap ); |
241 | va_end( ap ); |
242 | |
243 | /* Add it to our string */ |
244 | state->dest += sprintf( |
245 | state->dest, |
246 | "%s", |
247 | buffer |
248 | ); |
249 | state->length += l; |
250 | |
251 | return l; |
252 | } |
253 | |
254 | |
255 | /* Print an address to a string. If there's a symbol, the name will be printed */ |
256 | static int |
257 | print_addr ( struct r4k_dis_t * state, |
258 | uint32_t address ) |
259 | { |
260 | int len; |
261 | char * sym; |
262 | |
263 | |
264 | /* Try to lookup symbol */ |
265 | if( (sym = lookup_sym(state, address)) ) |
266 | { |
267 | len = db_printf( state, "%s", sym ); |
268 | } |
269 | else |
270 | { |
271 | len = db_printf( state, "0x%08X", address ); |
272 | } |
273 | |
274 | return len; |
275 | } |
276 | |
277 | |
278 | /* Disassemble an instruction */ |
279 | static db_addr_t |
280 | db_disasm_insn ( struct r4k_dis_t * state, |
281 | int insn, |
282 | db_addr_t loc, |
283 | bool altfmt ) |
284 | { |
285 | char * rel; |
286 | InstFmt i; |
287 | |
288 | i.word = insn; |
289 | |
290 | switch (i.JType.op) { |
291 | case OP_SPECIAL: |
292 | if (i.word == 0) { |
293 | db_printf(state, "nop"); |
294 | break; |
295 | } |
296 | /* XXX |
297 | * "addu" is a "move" only in 32-bit mode. What's the correct |
298 | * answer - never decode addu/daddu as "move"? |
299 | */ |
300 | if (i.RType.func == OP_ADDU && i.RType.rt == 0) { |
301 | db_printf(state, "%-16s%s,%s", |
302 | "move", |
303 | r4k_str_reg_name[i.RType.rd], |
304 | r4k_str_reg_name[i.RType.rs]); |
305 | break; |
306 | } |
307 | db_printf(state, "%-16s", r4k_str_spec_name[i.RType.func]); |
308 | switch (i.RType.func) { |
309 | case OP_SLL: |
310 | case OP_SRL: |
311 | case OP_SRA: |
312 | case OP_DSLL: |
313 | |
314 | case OP_DSRL: |
315 | case OP_DSRA: |
316 | case OP_DSLL32: |
317 | case OP_DSRL32: |
318 | case OP_DSRA32: |
319 | db_printf(state, "%s,%s,%d", |
320 | r4k_str_reg_name[i.RType.rd], |
321 | r4k_str_reg_name[i.RType.rt], |
322 | i.RType.shamt); |
323 | break; |
324 | |
325 | case OP_SLLV: |
326 | case OP_SRLV: |
327 | case OP_SRAV: |
328 | case OP_DSLLV: |
329 | case OP_DSRLV: |
330 | case OP_DSRAV: |
331 | db_printf(state, "%s,%s,%s", |
332 | r4k_str_reg_name[i.RType.rd], |
333 | r4k_str_reg_name[i.RType.rt], |
334 | r4k_str_reg_name[i.RType.rs]); |
335 | break; |
336 | |
337 | case OP_MFHI: |
338 | case OP_MFLO: |
339 | db_printf(state, "%s", r4k_str_reg_name[i.RType.rd]); |
340 | break; |
341 | |
342 | case OP_JR: |
343 | case OP_JALR: |
344 | db_printf(state, "%s", r4k_str_reg_name[i.RType.rs]); |
345 | break; |
346 | case OP_MTLO: |
347 | case OP_MTHI: |
348 | db_printf(state, "%s", r4k_str_reg_name[i.RType.rs]); |
349 | break; |
350 | |
351 | case OP_MULT: |
352 | case OP_MULTU: |
353 | case OP_DMULT: |
354 | case OP_DMULTU: |
355 | db_printf(state, "%s,%s", |
356 | r4k_str_reg_name[i.RType.rs], |
357 | r4k_str_reg_name[i.RType.rt]); |
358 | break; |
359 | |
360 | case OP_DIV: |
361 | case OP_DIVU: |
362 | case OP_DDIV: |
363 | case OP_DDIVU: |
364 | db_printf(state, "$zero,%s,%s", |
365 | r4k_str_reg_name[i.RType.rs], |
366 | r4k_str_reg_name[i.RType.rt]); |
367 | break; |
368 | |
369 | |
370 | case OP_SYSCALL: |
371 | case OP_SYNC: |
372 | break; |
373 | |
374 | case OP_BREAK: |
375 | db_printf(state, "%d", (i.RType.rs << 5) | i.RType.rt); |
376 | break; |
377 | |
378 | default: |
379 | db_printf(state, "%s,%s,%s", |
380 | r4k_str_reg_name[i.RType.rd], |
381 | r4k_str_reg_name[i.RType.rs], |
382 | r4k_str_reg_name[i.RType.rt]); |
383 | } |
384 | break; |
385 | |
386 | case OP_SPECIAL2: |
387 | if (i.RType.func == OP_MUL) |
388 | db_printf(state, "%s\t%s,%s,%s", |
389 | r4k_str_spec2_name[i.RType.func & 0x3], |
390 | r4k_str_reg_name[i.RType.rd], |
391 | r4k_str_reg_name[i.RType.rs], |
392 | r4k_str_reg_name[i.RType.rt]); |
393 | else |
394 | db_printf(state, "%s\t%s,%s", |
395 | r4k_str_spec2_name[i.RType.func & 0x3], |
396 | r4k_str_reg_name[i.RType.rs], |
397 | r4k_str_reg_name[i.RType.rt]); |
398 | |
399 | break; |
400 | |
401 | case OP_BCOND: |
402 | db_printf(state, "%-16s%s,", r4k_str_bcond_name[i.IType.rt], |
403 | r4k_str_reg_name[i.IType.rs]); |
404 | goto pr_displ; |
405 | |
406 | case OP_BLEZ: |
407 | case OP_BLEZL: |
408 | case OP_BGTZ: |
409 | case OP_BGTZL: |
410 | db_printf(state, "%-16s%s,", r4k_str_op_name[i.IType.op], |
411 | r4k_str_reg_name[i.IType.rs]); |
412 | goto pr_displ; |
413 | |
414 | case OP_BEQ: |
415 | case OP_BEQL: |
416 | if (i.IType.rs == 0 && i.IType.rt == 0) { |
417 | db_printf(state, "%-16s", "b"); |
418 | goto pr_displ; |
419 | } |
420 | /* FALLTHROUGH */ |
421 | case OP_BNE: |
422 | case OP_BNEL: |
423 | db_printf(state, "%-16s%s,%s,", r4k_str_op_name[i.IType.op], |
424 | r4k_str_reg_name[i.IType.rs], |
425 | r4k_str_reg_name[i.IType.rt]); |
426 | pr_displ: |
427 | print_addr( state, loc + 4 + ((short)i.IType.imm << 2) ); |
428 | break; |
429 | |
430 | case OP_COP0: |
431 | switch (i.RType.rs) { |
432 | case OP_BCx: |
433 | case OP_BCy: |
434 | |
435 | db_printf(state, "bc0%c\t", |
436 | "ft"[i.RType.rt & COPz_BC_TF_MASK]); |
437 | goto pr_displ; |
438 | |
439 | case OP_MT: |
440 | db_printf(state, "%-16s%s,%s", |
441 | "mtc0", |
442 | r4k_str_reg_name[i.RType.rt], |
443 | r4k_str_c0_reg[i.RType.rd]); |
444 | break; |
445 | |
446 | case OP_DMT: |
447 | db_printf(state, "%-16s%s,%s", |
448 | "dmtc0", |
449 | r4k_str_reg_name[i.RType.rt], |
450 | r4k_str_c0_reg[i.RType.rd]); |
451 | break; |
452 | |
453 | case OP_MF: |
454 | db_printf(state, "%-16s%s,%s", "mfc0", |
455 | r4k_str_reg_name[i.RType.rt], |
456 | r4k_str_c0_reg[i.RType.rd]); |
457 | break; |
458 | |
459 | case OP_DMF: |
460 | db_printf(state, "%-16s%s,%s","dmfc0", |
461 | r4k_str_reg_name[i.RType.rt], |
462 | r4k_str_c0_reg[i.RType.rd]); |
463 | break; |
464 | |
465 | default: |
466 | db_printf(state, "%s", r4k_str_c0_opname[i.FRType.func]); |
467 | } |
468 | break; |
469 | |
470 | case OP_COP1: |
471 | switch (i.RType.rs) { |
472 | case OP_BCx: |
473 | case OP_BCy: |
474 | db_printf(state, "bc1%c%s\t\t", |
475 | "ft"[i.RType.rt & COPz_BC_TF_MASK], |
476 | (insn >> 16 & 0x1F) == 2 || (insn >> 16 & 0x1F) == 3 ? "l" : ""); |
477 | goto pr_displ; |
478 | |
479 | case OP_MT: |
480 | db_printf(state, "mtc1\t\t%s,$f%d", |
481 | r4k_str_reg_name[i.RType.rt], |
482 | i.RType.rd); |
483 | break; |
484 | |
485 | case OP_MF: |
486 | db_printf(state, "mfc1\t\t%s,$f%d", |
487 | r4k_str_reg_name[i.RType.rt], |
488 | i.RType.rd); |
489 | break; |
490 | |
491 | case OP_CT: |
492 | db_printf(state, "ctc1\t\t%s,$f%d", |
493 | r4k_str_reg_name[i.RType.rt], |
494 | i.RType.rd); |
495 | break; |
496 | |
497 | case OP_CF: |
498 | db_printf(state, "cfc1\t\t%s,$f%d", |
499 | r4k_str_reg_name[i.RType.rt], |
500 | i.RType.rd); |
501 | break; |
502 | |
503 | case OP_DMT: |
504 | db_printf(state, "dmtc1\t\t%s,$f%d", |
505 | r4k_str_reg_name[i.RType.rt], |
506 | i.RType.rd); |
507 | break; |
508 | |
509 | case OP_DMF: |
510 | db_printf(state, "dmfc1\t\t%s,$f%d", |
511 | r4k_str_reg_name[i.RType.rt], |
512 | i.RType.rd); |
513 | break; |
514 | |
515 | case OP_MTH: |
516 | db_printf(state, "mthc1\t\t%s,$f%d", |
517 | r4k_str_reg_name[i.RType.rt], |
518 | i.RType.rd); |
519 | break; |
520 | |
521 | case OP_MFH: |
522 | db_printf(state, "mfhc1\t\t%s,$f%d", |
523 | r4k_str_reg_name[i.RType.rt], |
524 | i.RType.rd); |
525 | break; |
526 | |
527 | |
528 | default: |
529 | |
530 | if( i.FRType.func == 0x21 || i.FRType.func == 0x20 || i.FRType.func == 0x24 || i.FRType.func == 0x25 || |
531 | i.FRType.func == 7 || i.FRType.func == 6 || i.FRType.func == 0xd || |
532 | i.FRType.func == 4 || i.FRType.func == 5 || i.FRType.func == 9 ) |
533 | {/*NEG.fmt fd, fs*/ |
534 | |
535 | db_printf(state, "%s.%s\t\t$f%d,$f%d", |
536 | r4k_str_cop1_name[i.FRType.func], |
537 | r4k_str_fmt_name[i.FRType.fmt], |
538 | i.FRType.fd, i.FRType.fs); |
539 | } |
540 | else if( i.FRType.func != 1 && i.FRType.func != 2 && (insn & 0x3F) && !(insn >> 6 & 0x1F) ) /* C */ |
541 | { |
542 | db_printf(state, "%s.%s\t\t$f%d,$f%d", |
543 | r4k_str_cop1_name[i.FRType.func], |
544 | r4k_str_fmt_name[i.FRType.fmt], |
545 | i.FRType.fs, i.FRType.ft); |
546 | } |
547 | else |
548 | { |
549 | db_printf(state, "%s.%s\t\t$f%d,$f%d,$f%d", |
550 | r4k_str_cop1_name[i.FRType.func], |
551 | r4k_str_fmt_name[i.FRType.fmt], |
552 | i.FRType.fd, i.FRType.fs, i.FRType.ft); |
553 | } |
554 | } |
555 | break; |
556 | |
557 | case OP_J: |
558 | case OP_JAL: |
559 | db_printf(state, "%-16s", r4k_str_op_name[i.JType.op]); |
560 | print_addr(state, (loc & 0xF0000000) | (i.JType.target << 2)); |
561 | break; |
562 | |
563 | case OP_LDC1: |
564 | case OP_LWC1: |
565 | case OP_SWC1: |
566 | case OP_SDC1: |
567 | db_printf(state, "%-16s$f%d,", r4k_str_op_name[i.IType.op], |
568 | i.IType.rt); |
569 | goto loadstore; |
570 | |
571 | case OP_LB: |
572 | case OP_LH: |
573 | case OP_LW: |
574 | case OP_LWL: |
575 | case OP_LWR: |
576 | case OP_LD: |
577 | case OP_LBU: |
578 | case OP_LHU: |
579 | case OP_LWU: |
580 | case OP_SB: |
581 | case OP_SH: |
582 | case OP_SW: |
583 | case OP_SWL: |
584 | case OP_SWR: |
585 | case OP_SD: |
586 | db_printf(state, "%-16s%s,", r4k_str_op_name[i.IType.op], |
587 | r4k_str_reg_name[i.IType.rt]); |
588 | loadstore: |
589 | |
590 | /* Part of a relocation? */ |
591 | if( (rel = lookup_rel_lo16(state, loc)) ) |
592 | { |
593 | /* Yes. */ |
594 | db_printf(state, |
595 | "%%lo(%s)(%s)", |
596 | rel, |
597 | r4k_str_reg_name[i.IType.rs] |
598 | ); |
599 | |
600 | break; |
601 | } |
602 | |
603 | |
604 | db_printf(state, "%d(%s)", (short)i.IType.imm, |
605 | r4k_str_reg_name[i.IType.rs]); |
606 | break; |
607 | |
608 | case OP_ORI: |
609 | case OP_XORI: |
610 | if( i.IType.op == OP_ORI ) |
611 | { |
612 | /* Part of a relocation? */ |
613 | if( (rel = lookup_rel_lo16(state, loc)) ) |
614 | { |
615 | /* Yes. */ |
616 | db_printf(state, |
617 | "%-16s%s,%s,%%lo(%s)", |
618 | r4k_str_op_name[i.IType.op], |
619 | r4k_str_reg_name[i.IType.rt], |
620 | r4k_str_reg_name[i.IType.rs], |
621 | rel |
622 | ); |
623 | |
624 | break; |
625 | } |
626 | else |
627 | { |
628 | db_printf(state, "%-16s%s,%s,0x%x", r4k_str_op_name[i.IType.op], |
629 | r4k_str_reg_name[i.IType.rt], |
630 | r4k_str_reg_name[i.IType.rs], |
631 | i.IType.imm); |
632 | |
633 | break; |
634 | } |
635 | } |
636 | else |
637 | if (i.IType.rs == 0) { |
638 | db_printf(state, "%-16s%s,0x%x", |
639 | "li", |
640 | r4k_str_reg_name[i.IType.rt], |
641 | i.IType.imm); |
642 | break; |
643 | } |
644 | /* FALLTHROUGH */ |
645 | case OP_ANDI: |
646 | db_printf(state, "%-16s%s,%s,0x%x", r4k_str_op_name[i.IType.op], |
647 | r4k_str_reg_name[i.IType.rt], |
648 | r4k_str_reg_name[i.IType.rs], |
649 | i.IType.imm); |
650 | break; |
651 | |
652 | case OP_LUI: |
653 | { |
654 | /* Part of a relocation? */ |
655 | if( (rel = lookup_rel_hi16(state, loc)) ) |
656 | { |
657 | /* Yes. */ |
658 | db_printf(state, |
659 | "%-16s%s,%%hi(%s)", |
660 | r4k_str_op_name[i.IType.op], |
661 | r4k_str_reg_name[i.IType.rt], |
662 | rel |
663 | ); |
664 | } |
665 | else |
666 | { |
667 | db_printf(state, "%-16s%s,0x%x", r4k_str_op_name[i.IType.op], |
668 | r4k_str_reg_name[i.IType.rt], |
669 | i.IType.imm); |
670 | } |
671 | } |
672 | break; |
673 | |
674 | case OP_CACHE: |
675 | db_printf(state, "%-16s0x%x,0x%x(%s)", |
676 | r4k_str_op_name[i.IType.op], |
677 | i.IType.rt, |
678 | i.IType.imm, |
679 | r4k_str_reg_name[i.IType.rs]); |
680 | break; |
681 | |
682 | case OP_ADDI: |
683 | case OP_DADDI: |
684 | case OP_ADDIU: |
685 | case OP_DADDIU: |
686 | { |
687 | |
688 | /* Part of a relocation? */ |
689 | if( (rel = lookup_rel_lo16(state, loc)) ) |
690 | { |
691 | /* Yes. */ |
692 | db_printf(state, |
693 | "%-16s%s,%s,%%lo(%s)", |
694 | r4k_str_op_name[i.IType.op], |
695 | r4k_str_reg_name[i.IType.rt], |
696 | r4k_str_reg_name[i.IType.rs], |
697 | rel |
698 | ); |
699 | |
700 | break; |
701 | } |
702 | |
703 | if (i.IType.rs == 0) { |
704 | db_printf(state, "%-16s%s,%d", "li", |
705 | r4k_str_reg_name[i.IType.rt], |
706 | (short)i.IType.imm); |
707 | break; |
708 | } |
709 | /* FALLTHROUGH */ |
710 | |
711 | default: |
712 | |
713 | db_printf(state, "%-16s%s,%s,%d", r4k_str_op_name[i.IType.op], |
714 | r4k_str_reg_name[i.IType.rt], |
715 | r4k_str_reg_name[i.IType.rs], |
716 | (short)i.IType.imm); |
717 | } } |
718 | /*db_printf(state, "\n");*/ |
719 | |
720 | return (loc + 4); |
721 | } |
722 | |
723 | |
724 | |
725 | /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
726 | Global functions |
727 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
728 | |
729 | /* Disassemble an instruction with state */ |
730 | static int |
731 | r4k_disassemble ( struct r4k_dis_t * state, |
732 | uint32_t instruction, |
733 | uint32_t location, |
734 | char * dest ) |
735 | { |
736 | state->dest = dest; |
737 | db_disasm_insn( state, instruction, location, 0 ); |
738 | |
739 | return state->length; |
740 | } |
741 | |
742 | |
743 | |
744 | /* Disassemble an instruction but split the opcode/operands into two char *'s */ |
745 | static int |
746 | r4k_disassemble_split ( struct r4k_dis_t * state, |
747 | uint32_t instruction, |
748 | uint32_t location, |
749 | char ** opcode, |
750 | char ** operands ) |
751 | { |
752 | int v, i; |
753 | char buff[128], * dupd; |
754 | |
755 | v = r4k_disassemble( |
756 | state, |
757 | instruction, |
758 | location, |
759 | buff |
760 | ); |
761 | |
762 | dupd = strdup( buff ); |
763 | *opcode = &dupd[0]; |
764 | |
765 | for( i = 0; buff[i] && buff[i] != ' '; i++ ); |
766 | |
767 | dupd[i] = '\0'; |
768 | |
769 | for( ; buff[i] && buff[i] == ' '; i++ ); |
770 | |
771 | *operands = &dupd[i]; |
772 | |
773 | return v; |
774 | } |
775 | |
776 | |
777 | |
778 | /* Disassemble an instruction with a blank state but split op/operands */ |
779 | static int |
780 | r4k_disassemble_split_quick ( uint32_t instruction, |
781 | uint32_t location, |
782 | char ** opcode, |
783 | char ** operands ) |
784 | { |
785 | struct r4k_dis_t state; |
786 | |
787 | /* Init state */ |
788 | memset( &state, 0, sizeof(state) ); |
789 | |
790 | /* Perform */ |
791 | return r4k_disassemble_split( |
792 | &state, |
793 | instruction, |
794 | location, |
795 | opcode, |
796 | operands |
797 | ); |
798 | } |
799 | |
800 | |
801 | //=-=-=-=-=-=-=-=-=-=-=-=-=-=-=[ DECODE_OP ]=-=-=-=-=-=-=-=-=-=-=-=-=-=-=[// |
802 | |
803 | void r4300_decode_op ( uint32 instr, char * opcode, char * arguments, int counter ) |
804 | { |
805 | char * _op, * _args; |
806 | |
807 | _op = NULL; |
808 | _args = NULL; |
809 | |
810 | r4k_disassemble_split_quick( |
811 | instr, |
812 | counter, |
813 | &_op, |
814 | &_args |
815 | ); |
816 | |
817 | strcpy( opcode, _op ); |
818 | strcpy( arguments, _args ); |
819 | |
820 | free( _op ); |
821 | } |
822 | |