1 /* Print mips instructions for GDB, the GNU debugger, or for objdump.
2 Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2005
4 Free Software Foundation, Inc.
5 Contributed by Nobuyuki Hikichi(hikichi@sra.co.jp).
6
7 This file is part of GDB, GAS, and the GNU binutils.
8
9 This program 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 2 of the License, or
12 (at your option) any later version.
13
14 This program 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; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24 #include "sysdep.h"
25 #include "dis-asm.h"
26 #include "libiberty.h"
27 #include "opcode/mips.h"
28 #include "opintl.h"
29
30 /* FIXME: These are needed to figure out if the code is mips16 or
31 not. The low bit of the address is often a good indicator. No
32 symbol table is available when this code runs out in an embedded
33 system as when it is used for disassembler support in a monitor. */
34
35 #if !defined(EMBEDDED_ENV)
36 #define SYMTAB_AVAILABLE 1
37 #include "elf-bfd.h"
38 #include "elf/mips.h"
39 #endif
40
41 /* Mips instructions are at maximum this many bytes long. */
42 #define INSNLEN 4
43
44
45 /* FIXME: These should be shared with gdb somehow. */
46
47 struct mips_cp0sel_name
48 {
49 unsigned int cp0reg;
50 unsigned int sel;
51 const char * const name;
52 };
53
54 /* The mips16 register names. */
55 static const char * const mips16_reg_names[] =
56 {
57 "s0", "s1", "v0", "v1", "a0", "a1", "a2", "a3"
58 };
59
60 static const char * const mips_gpr_names_numeric[32] =
61 {
62 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
63 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
64 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
65 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
66 };
67
68 static const char * const mips_gpr_names_oldabi[32] =
69 {
70 "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
71 "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
72 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
73 "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
74 };
75
76 static const char * const mips_gpr_names_newabi[32] =
77 {
78 "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
79 "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
80 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
81 "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
82 };
83
84 static const char * const mips_fpr_names_numeric[32] =
85 {
86 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
87 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
88 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
89 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"
90 };
91
92 static const char * const mips_fpr_names_32[32] =
93 {
94 "fv0", "fv0f", "fv1", "fv1f", "ft0", "ft0f", "ft1", "ft1f",
95 "ft2", "ft2f", "ft3", "ft3f", "fa0", "fa0f", "fa1", "fa1f",
96 "ft4", "ft4f", "ft5", "ft5f", "fs0", "fs0f", "fs1", "fs1f",
97 "fs2", "fs2f", "fs3", "fs3f", "fs4", "fs4f", "fs5", "fs5f"
98 };
99
100 static const char * const mips_fpr_names_n32[32] =
101 {
102 "fv0", "ft14", "fv1", "ft15", "ft0", "ft1", "ft2", "ft3",
103 "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
104 "fa4", "fa5", "fa6", "fa7", "fs0", "ft8", "fs1", "ft9",
105 "fs2", "ft10", "fs3", "ft11", "fs4", "ft12", "fs5", "ft13"
106 };
107
108 static const char * const mips_fpr_names_64[32] =
109 {
110 "fv0", "ft12", "fv1", "ft13", "ft0", "ft1", "ft2", "ft3",
111 "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
112 "fa4", "fa5", "fa6", "fa7", "ft8", "ft9", "ft10", "ft11",
113 "fs0", "fs1", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7"
114 };
115
116 static const char * const mips_cp0_names_numeric[32] =
117 {
118 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
119 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
120 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
121 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
122 };
123
124 static const char * const mips_cp0_names_mips3264[32] =
125 {
126 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
127 "c0_context", "c0_pagemask", "c0_wired", "$7",
128 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
129 "c0_status", "c0_cause", "c0_epc", "c0_prid",
130 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
131 "c0_xcontext", "$21", "$22", "c0_debug",
132 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
133 "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
134 };
135
136 static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] =
137 {
138 { 16, 1, "c0_config1" },
139 { 16, 2, "c0_config2" },
140 { 16, 3, "c0_config3" },
141 { 18, 1, "c0_watchlo,1" },
142 { 18, 2, "c0_watchlo,2" },
143 { 18, 3, "c0_watchlo,3" },
144 { 18, 4, "c0_watchlo,4" },
145 { 18, 5, "c0_watchlo,5" },
146 { 18, 6, "c0_watchlo,6" },
147 { 18, 7, "c0_watchlo,7" },
148 { 19, 1, "c0_watchhi,1" },
149 { 19, 2, "c0_watchhi,2" },
150 { 19, 3, "c0_watchhi,3" },
151 { 19, 4, "c0_watchhi,4" },
152 { 19, 5, "c0_watchhi,5" },
153 { 19, 6, "c0_watchhi,6" },
154 { 19, 7, "c0_watchhi,7" },
155 { 25, 1, "c0_perfcnt,1" },
156 { 25, 2, "c0_perfcnt,2" },
157 { 25, 3, "c0_perfcnt,3" },
158 { 25, 4, "c0_perfcnt,4" },
159 { 25, 5, "c0_perfcnt,5" },
160 { 25, 6, "c0_perfcnt,6" },
161 { 25, 7, "c0_perfcnt,7" },
162 { 27, 1, "c0_cacheerr,1" },
163 { 27, 2, "c0_cacheerr,2" },
164 { 27, 3, "c0_cacheerr,3" },
165 { 28, 1, "c0_datalo" },
166 { 29, 1, "c0_datahi" }
167 };
168
169 static const char * const mips_cp0_names_mips3264r2[32] =
170 {
171 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
172 "c0_context", "c0_pagemask", "c0_wired", "c0_hwrena",
173 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
174 "c0_status", "c0_cause", "c0_epc", "c0_prid",
175 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
176 "c0_xcontext", "$21", "$22", "c0_debug",
177 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
178 "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
179 };
180
181 static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] =
182 {
183 { 4, 1, "c0_contextconfig" },
184 { 5, 1, "c0_pagegrain" },
185 { 12, 1, "c0_intctl" },
186 { 12, 2, "c0_srsctl" },
187 { 12, 3, "c0_srsmap" },
188 { 15, 1, "c0_ebase" },
189 { 16, 1, "c0_config1" },
190 { 16, 2, "c0_config2" },
191 { 16, 3, "c0_config3" },
192 { 18, 1, "c0_watchlo,1" },
193 { 18, 2, "c0_watchlo,2" },
194 { 18, 3, "c0_watchlo,3" },
195 { 18, 4, "c0_watchlo,4" },
196 { 18, 5, "c0_watchlo,5" },
197 { 18, 6, "c0_watchlo,6" },
198 { 18, 7, "c0_watchlo,7" },
199 { 19, 1, "c0_watchhi,1" },
200 { 19, 2, "c0_watchhi,2" },
201 { 19, 3, "c0_watchhi,3" },
202 { 19, 4, "c0_watchhi,4" },
203 { 19, 5, "c0_watchhi,5" },
204 { 19, 6, "c0_watchhi,6" },
205 { 19, 7, "c0_watchhi,7" },
206 { 23, 1, "c0_tracecontrol" },
207 { 23, 2, "c0_tracecontrol2" },
208 { 23, 3, "c0_usertracedata" },
209 { 23, 4, "c0_tracebpc" },
210 { 25, 1, "c0_perfcnt,1" },
211 { 25, 2, "c0_perfcnt,2" },
212 { 25, 3, "c0_perfcnt,3" },
213 { 25, 4, "c0_perfcnt,4" },
214 { 25, 5, "c0_perfcnt,5" },
215 { 25, 6, "c0_perfcnt,6" },
216 { 25, 7, "c0_perfcnt,7" },
217 { 27, 1, "c0_cacheerr,1" },
218 { 27, 2, "c0_cacheerr,2" },
219 { 27, 3, "c0_cacheerr,3" },
220 { 28, 1, "c0_datalo" },
221 { 28, 2, "c0_taglo1" },
222 { 28, 3, "c0_datalo1" },
223 { 28, 4, "c0_taglo2" },
224 { 28, 5, "c0_datalo2" },
225 { 28, 6, "c0_taglo3" },
226 { 28, 7, "c0_datalo3" },
227 { 29, 1, "c0_datahi" },
228 { 29, 2, "c0_taghi1" },
229 { 29, 3, "c0_datahi1" },
230 { 29, 4, "c0_taghi2" },
231 { 29, 5, "c0_datahi2" },
232 { 29, 6, "c0_taghi3" },
233 { 29, 7, "c0_datahi3" },
234 };
235
236 /* SB-1: MIPS64 (mips_cp0_names_mips3264) with minor mods. */
237 static const char * const mips_cp0_names_sb1[32] =
238 {
239 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
240 "c0_context", "c0_pagemask", "c0_wired", "$7",
241 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
242 "c0_status", "c0_cause", "c0_epc", "c0_prid",
243 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
244 "c0_xcontext", "$21", "$22", "c0_debug",
245 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr_i",
246 "c0_taglo_i", "c0_taghi_i", "c0_errorepc", "c0_desave",
247 };
248
249 static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] =
250 {
251 { 16, 1, "c0_config1" },
252 { 18, 1, "c0_watchlo,1" },
253 { 19, 1, "c0_watchhi,1" },
254 { 22, 0, "c0_perftrace" },
255 { 23, 3, "c0_edebug" },
256 { 25, 1, "c0_perfcnt,1" },
257 { 25, 2, "c0_perfcnt,2" },
258 { 25, 3, "c0_perfcnt,3" },
259 { 25, 4, "c0_perfcnt,4" },
260 { 25, 5, "c0_perfcnt,5" },
261 { 25, 6, "c0_perfcnt,6" },
262 { 25, 7, "c0_perfcnt,7" },
263 { 26, 1, "c0_buserr_pa" },
264 { 27, 1, "c0_cacheerr_d" },
265 { 27, 3, "c0_cacheerr_d_pa" },
266 { 28, 1, "c0_datalo_i" },
267 { 28, 2, "c0_taglo_d" },
268 { 28, 3, "c0_datalo_d" },
269 { 29, 1, "c0_datahi_i" },
270 { 29, 2, "c0_taghi_d" },
271 { 29, 3, "c0_datahi_d" },
272 };
273
274 static const char * const mips_hwr_names_numeric[32] =
275 {
276 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
277 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
278 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
279 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
280 };
281
282 static const char * const mips_hwr_names_mips3264r2[32] =
283 {
284 "hwr_cpunum", "hwr_synci_step", "hwr_cc", "hwr_ccres",
285 "$4", "$5", "$6", "$7",
286 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
287 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
288 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
289 };
290
291 struct mips_abi_choice
292 {
293 const char * name;
294 const char * const *gpr_names;
295 const char * const *fpr_names;
296 };
297
298 struct mips_abi_choice mips_abi_choices[] =
299 {
300 { "numeric", mips_gpr_names_numeric, mips_fpr_names_numeric },
301 { "32", mips_gpr_names_oldabi, mips_fpr_names_32 },
302 { "n32", mips_gpr_names_newabi, mips_fpr_names_n32 },
303 { "64", mips_gpr_names_newabi, mips_fpr_names_64 },
304 };
305
306 struct mips_arch_choice
307 {
308 const char *name;
309 int bfd_mach_valid;
310 unsigned long bfd_mach;
311 int processor;
312 int isa;
313 const char * const *cp0_names;
314 const struct mips_cp0sel_name *cp0sel_names;
315 unsigned int cp0sel_names_len;
316 const char * const *hwr_names;
317 };
318
319 const struct mips_arch_choice mips_arch_choices[] =
320 {
321 { "numeric", 0, 0, 0, 0,
322 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
323
324 { "r3000", 1, bfd_mach_mips3000, CPU_R3000, ISA_MIPS1,
325 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
326 { "r3900", 1, bfd_mach_mips3900, CPU_R3900, ISA_MIPS1,
327 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
328 { "r4000", 1, bfd_mach_mips4000, CPU_R4000, ISA_MIPS3,
329 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
330 { "r4010", 1, bfd_mach_mips4010, CPU_R4010, ISA_MIPS2,
331 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
332 { "vr4100", 1, bfd_mach_mips4100, CPU_VR4100, ISA_MIPS3,
333 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
334 { "vr4111", 1, bfd_mach_mips4111, CPU_R4111, ISA_MIPS3,
335 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
336 { "vr4120", 1, bfd_mach_mips4120, CPU_VR4120, ISA_MIPS3,
337 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
338 { "r4300", 1, bfd_mach_mips4300, CPU_R4300, ISA_MIPS3,
339 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
340 { "r4400", 1, bfd_mach_mips4400, CPU_R4400, ISA_MIPS3,
341 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
342 { "r4600", 1, bfd_mach_mips4600, CPU_R4600, ISA_MIPS3,
343 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
344 { "r4650", 1, bfd_mach_mips4650, CPU_R4650, ISA_MIPS3,
345 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
346 { "r5000", 1, bfd_mach_mips5000, CPU_R5000, ISA_MIPS4,
347 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
348 { "vr5400", 1, bfd_mach_mips5400, CPU_VR5400, ISA_MIPS4,
349 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
350 { "vr5500", 1, bfd_mach_mips5500, CPU_VR5500, ISA_MIPS4,
351 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
352 { "r6000", 1, bfd_mach_mips6000, CPU_R6000, ISA_MIPS2,
353 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
354 { "rm7000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
355 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
356 { "rm9000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
357 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
358 { "r8000", 1, bfd_mach_mips8000, CPU_R8000, ISA_MIPS4,
359 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
360 { "r10000", 1, bfd_mach_mips10000, CPU_R10000, ISA_MIPS4,
361 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
362 { "r12000", 1, bfd_mach_mips12000, CPU_R12000, ISA_MIPS4,
363 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
364 { "mips5", 1, bfd_mach_mips5, CPU_MIPS5, ISA_MIPS5,
365 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
366
367 /* For stock MIPS32, disassemble all applicable MIPS-specified ASEs.
368 Note that MIPS-3D and MDMX are not applicable to MIPS32. (See
369 _MIPS32 Architecture For Programmers Volume I: Introduction to the
370 MIPS32 Architecture_ (MIPS Document Number MD00082, Revision 0.95),
371 page 1. */
372 { "mips32", 1, bfd_mach_mipsisa32, CPU_MIPS32,
373 ISA_MIPS32 | INSN_MIPS16,
374 mips_cp0_names_mips3264,
375 mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
376 mips_hwr_names_numeric },
377
378 { "mips32r2", 1, bfd_mach_mipsisa32r2, CPU_MIPS32R2,
379 ISA_MIPS32R2 | INSN_MIPS16,
380 mips_cp0_names_mips3264r2,
381 mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
382 mips_hwr_names_mips3264r2 },
383
384 /* For stock MIPS64, disassemble all applicable MIPS-specified ASEs. */
385 { "mips64", 1, bfd_mach_mipsisa64, CPU_MIPS64,
386 ISA_MIPS64 | INSN_MIPS16 | INSN_MIPS3D | INSN_MDMX,
387 mips_cp0_names_mips3264,
388 mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
389 mips_hwr_names_numeric },
390
391 { "mips64r2", 1, bfd_mach_mipsisa64r2, CPU_MIPS64R2,
392 ISA_MIPS64R2 | INSN_MIPS16 | INSN_MIPS3D | INSN_MDMX,
393 mips_cp0_names_mips3264r2,
394 mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
395 mips_hwr_names_mips3264r2 },
396
397 { "sb1", 1, bfd_mach_mips_sb1, CPU_SB1,
398 ISA_MIPS64 | INSN_MIPS3D | INSN_SB1,
399 mips_cp0_names_sb1,
400 mips_cp0sel_names_sb1, ARRAY_SIZE (mips_cp0sel_names_sb1),
401 mips_hwr_names_numeric },
402
403 /* This entry, mips16, is here only for ISA/processor selection; do
404 not print its name. */
405 { "", 1, bfd_mach_mips16, CPU_MIPS16, ISA_MIPS3 | INSN_MIPS16,
406 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
407 };
408
409 /* ISA and processor type to disassemble for, and register names to use.
410 set_default_mips_dis_options and parse_mips_dis_options fill in these
411 values. */
412 static int mips_processor;
413 static int mips_isa;
414 static const char * const *mips_gpr_names;
415 static const char * const *mips_fpr_names;
416 static const char * const *mips_cp0_names;
417 static const struct mips_cp0sel_name *mips_cp0sel_names;
418 static int mips_cp0sel_names_len;
419 static const char * const *mips_hwr_names;
420
421 /* Other options */
422 static int no_aliases; /* If set disassemble as most general inst. */
423
424 static const struct mips_abi_choice *
choose_abi_by_name(const char * name,unsigned int namelen)425 choose_abi_by_name (const char *name, unsigned int namelen)
426 {
427 const struct mips_abi_choice *c;
428 unsigned int i;
429
430 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_abi_choices) && c == NULL; i++)
431 if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
432 && strlen (mips_abi_choices[i].name) == namelen)
433 c = &mips_abi_choices[i];
434
435 return c;
436 }
437
438 static const struct mips_arch_choice *
choose_arch_by_name(const char * name,unsigned int namelen)439 choose_arch_by_name (const char *name, unsigned int namelen)
440 {
441 const struct mips_arch_choice *c = NULL;
442 unsigned int i;
443
444 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
445 if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
446 && strlen (mips_arch_choices[i].name) == namelen)
447 c = &mips_arch_choices[i];
448
449 return c;
450 }
451
452 static const struct mips_arch_choice *
choose_arch_by_number(unsigned long mach)453 choose_arch_by_number (unsigned long mach)
454 {
455 static unsigned long hint_bfd_mach;
456 static const struct mips_arch_choice *hint_arch_choice;
457 const struct mips_arch_choice *c;
458 unsigned int i;
459
460 /* We optimize this because even if the user specifies no
461 flags, this will be done for every instruction! */
462 if (hint_bfd_mach == mach
463 && hint_arch_choice != NULL
464 && hint_arch_choice->bfd_mach == hint_bfd_mach)
465 return hint_arch_choice;
466
467 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
468 {
469 if (mips_arch_choices[i].bfd_mach_valid
470 && mips_arch_choices[i].bfd_mach == mach)
471 {
472 c = &mips_arch_choices[i];
473 hint_bfd_mach = mach;
474 hint_arch_choice = c;
475 }
476 }
477 return c;
478 }
479
480 /* Check if the object uses NewABI conventions. */
481
482 static int
is_newabi(Elf_Internal_Ehdr * header)483 is_newabi (Elf_Internal_Ehdr *header)
484 {
485 /* There are no old-style ABIs which use 64-bit ELF. */
486 if (header->e_ident[EI_CLASS] == ELFCLASS64)
487 return 1;
488
489 /* If a 32-bit ELF file, n32 is a new-style ABI. */
490 if ((header->e_flags & EF_MIPS_ABI2) != 0)
491 return 1;
492
493 return 0;
494 }
495
496 static void
set_default_mips_dis_options(struct disassemble_info * info)497 set_default_mips_dis_options (struct disassemble_info *info)
498 {
499 const struct mips_arch_choice *chosen_arch;
500
501 /* Defaults: mipsIII/r3000 (?!), (o)32-style ("oldabi") GPR names,
502 and numeric FPR, CP0 register, and HWR names. */
503 mips_isa = ISA_MIPS3;
504 mips_processor = CPU_R3000;
505 mips_gpr_names = mips_gpr_names_oldabi;
506 mips_fpr_names = mips_fpr_names_numeric;
507 mips_cp0_names = mips_cp0_names_numeric;
508 mips_cp0sel_names = NULL;
509 mips_cp0sel_names_len = 0;
510 mips_hwr_names = mips_hwr_names_numeric;
511 no_aliases = 0;
512
513 /* If an ELF "newabi" binary, use the n32/(n)64 GPR names. */
514 if (info->flavour == bfd_target_elf_flavour && info->section != NULL)
515 {
516 Elf_Internal_Ehdr *header;
517
518 header = elf_elfheader (info->section->owner);
519 if (is_newabi (header))
520 mips_gpr_names = mips_gpr_names_newabi;
521 }
522
523 /* Set ISA, architecture, and cp0 register names as best we can. */
524 #if ! SYMTAB_AVAILABLE
525 /* This is running out on a target machine, not in a host tool.
526 FIXME: Where does mips_target_info come from? */
527 target_processor = mips_target_info.processor;
528 mips_isa = mips_target_info.isa;
529 #else
530 chosen_arch = choose_arch_by_number (info->mach);
531 if (chosen_arch != NULL)
532 {
533 mips_processor = chosen_arch->processor;
534 mips_isa = chosen_arch->isa;
535 mips_cp0_names = chosen_arch->cp0_names;
536 mips_cp0sel_names = chosen_arch->cp0sel_names;
537 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
538 mips_hwr_names = chosen_arch->hwr_names;
539 }
540 #endif
541 }
542
543 static void
parse_mips_dis_option(const char * option,unsigned int len)544 parse_mips_dis_option (const char *option, unsigned int len)
545 {
546 unsigned int i, optionlen, vallen;
547 const char *val;
548 const struct mips_abi_choice *chosen_abi;
549 const struct mips_arch_choice *chosen_arch;
550
551 /* Try to match options that are simple flags */
552 if (strncmp (option, "no-aliases", 10) == 0)
553 {
554 no_aliases = 1;
555 return;
556 }
557
558 /* Look for the = that delimits the end of the option name. */
559 for (i = 0; i < len; i++)
560 if (option[i] == '=')
561 break;
562
563 if (i == 0) /* Invalid option: no name before '='. */
564 return;
565 if (i == len) /* Invalid option: no '='. */
566 return;
567 if (i == (len - 1)) /* Invalid option: no value after '='. */
568 return;
569
570 optionlen = i;
571 val = option + (optionlen + 1);
572 vallen = len - (optionlen + 1);
573
574 if (strncmp ("gpr-names", option, optionlen) == 0
575 && strlen ("gpr-names") == optionlen)
576 {
577 chosen_abi = choose_abi_by_name (val, vallen);
578 if (chosen_abi != NULL)
579 mips_gpr_names = chosen_abi->gpr_names;
580 return;
581 }
582
583 if (strncmp ("fpr-names", option, optionlen) == 0
584 && strlen ("fpr-names") == optionlen)
585 {
586 chosen_abi = choose_abi_by_name (val, vallen);
587 if (chosen_abi != NULL)
588 mips_fpr_names = chosen_abi->fpr_names;
589 return;
590 }
591
592 if (strncmp ("cp0-names", option, optionlen) == 0
593 && strlen ("cp0-names") == optionlen)
594 {
595 chosen_arch = choose_arch_by_name (val, vallen);
596 if (chosen_arch != NULL)
597 {
598 mips_cp0_names = chosen_arch->cp0_names;
599 mips_cp0sel_names = chosen_arch->cp0sel_names;
600 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
601 }
602 return;
603 }
604
605 if (strncmp ("hwr-names", option, optionlen) == 0
606 && strlen ("hwr-names") == optionlen)
607 {
608 chosen_arch = choose_arch_by_name (val, vallen);
609 if (chosen_arch != NULL)
610 mips_hwr_names = chosen_arch->hwr_names;
611 return;
612 }
613
614 if (strncmp ("reg-names", option, optionlen) == 0
615 && strlen ("reg-names") == optionlen)
616 {
617 /* We check both ABI and ARCH here unconditionally, so
618 that "numeric" will do the desirable thing: select
619 numeric register names for all registers. Other than
620 that, a given name probably won't match both. */
621 chosen_abi = choose_abi_by_name (val, vallen);
622 if (chosen_abi != NULL)
623 {
624 mips_gpr_names = chosen_abi->gpr_names;
625 mips_fpr_names = chosen_abi->fpr_names;
626 }
627 chosen_arch = choose_arch_by_name (val, vallen);
628 if (chosen_arch != NULL)
629 {
630 mips_cp0_names = chosen_arch->cp0_names;
631 mips_cp0sel_names = chosen_arch->cp0sel_names;
632 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
633 mips_hwr_names = chosen_arch->hwr_names;
634 }
635 return;
636 }
637
638 /* Invalid option. */
639 }
640
641 static void
parse_mips_dis_options(const char * options)642 parse_mips_dis_options (const char *options)
643 {
644 const char *option_end;
645
646 if (options == NULL)
647 return;
648
649 while (*options != '\0')
650 {
651 /* Skip empty options. */
652 if (*options == ',')
653 {
654 options++;
655 continue;
656 }
657
658 /* We know that *options is neither NUL or a comma. */
659 option_end = options + 1;
660 while (*option_end != ',' && *option_end != '\0')
661 option_end++;
662
663 parse_mips_dis_option (options, option_end - options);
664
665 /* Go on to the next one. If option_end points to a comma, it
666 will be skipped above. */
667 options = option_end;
668 }
669 }
670
671 static const struct mips_cp0sel_name *
lookup_mips_cp0sel_name(const struct mips_cp0sel_name * names,unsigned int len,unsigned int cp0reg,unsigned int sel)672 lookup_mips_cp0sel_name (const struct mips_cp0sel_name *names,
673 unsigned int len,
674 unsigned int cp0reg,
675 unsigned int sel)
676 {
677 unsigned int i;
678
679 for (i = 0; i < len; i++)
680 if (names[i].cp0reg == cp0reg && names[i].sel == sel)
681 return &names[i];
682 return NULL;
683 }
684
685 /* Print insn arguments for 32/64-bit code. */
686
687 static void
print_insn_args(const char * d,register unsigned long int l,bfd_vma pc,struct disassemble_info * info)688 print_insn_args (const char *d,
689 register unsigned long int l,
690 bfd_vma pc,
691 struct disassemble_info *info)
692 {
693 int op, delta;
694 unsigned int lsb, msb, msbd;
695
696 lsb = 0;
697
698 for (; *d != '\0'; d++)
699 {
700 switch (*d)
701 {
702 case ',':
703 case '(':
704 case ')':
705 case '[':
706 case ']':
707 (*info->fprintf_func) (info->stream, "%c", *d);
708 break;
709
710 case '+':
711 /* Extension character; switch for second char. */
712 d++;
713 switch (*d)
714 {
715 case '\0':
716 /* xgettext:c-format */
717 (*info->fprintf_func) (info->stream,
718 _("# internal error, incomplete extension sequence (+)"));
719 return;
720
721 case 'A':
722 lsb = (l >> OP_SH_SHAMT) & OP_MASK_SHAMT;
723 (*info->fprintf_func) (info->stream, "0x%x", lsb);
724 break;
725
726 case 'B':
727 msb = (l >> OP_SH_INSMSB) & OP_MASK_INSMSB;
728 (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
729 break;
730
731 case 'C':
732 case 'H':
733 msbd = (l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD;
734 (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
735 break;
736
737 case 'D':
738 {
739 const struct mips_cp0sel_name *n;
740 unsigned int cp0reg, sel;
741
742 cp0reg = (l >> OP_SH_RD) & OP_MASK_RD;
743 sel = (l >> OP_SH_SEL) & OP_MASK_SEL;
744
745 /* CP0 register including 'sel' code for mtcN (et al.), to be
746 printed textually if known. If not known, print both
747 CP0 register name and sel numerically since CP0 register
748 with sel 0 may have a name unrelated to register being
749 printed. */
750 n = lookup_mips_cp0sel_name(mips_cp0sel_names,
751 mips_cp0sel_names_len, cp0reg, sel);
752 if (n != NULL)
753 (*info->fprintf_func) (info->stream, "%s", n->name);
754 else
755 (*info->fprintf_func) (info->stream, "$%d,%d", cp0reg, sel);
756 break;
757 }
758
759 case 'E':
760 lsb = ((l >> OP_SH_SHAMT) & OP_MASK_SHAMT) + 32;
761 (*info->fprintf_func) (info->stream, "0x%x", lsb);
762 break;
763
764 case 'F':
765 msb = ((l >> OP_SH_INSMSB) & OP_MASK_INSMSB) + 32;
766 (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
767 break;
768
769 case 'G':
770 msbd = ((l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD) + 32;
771 (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
772 break;
773
774 default:
775 /* xgettext:c-format */
776 (*info->fprintf_func) (info->stream,
777 _("# internal error, undefined extension sequence (+%c)"),
778 *d);
779 return;
780 }
781 break;
782
783 case 's':
784 case 'b':
785 case 'r':
786 case 'v':
787 (*info->fprintf_func) (info->stream, "%s",
788 mips_gpr_names[(l >> OP_SH_RS) & OP_MASK_RS]);
789 break;
790
791 case 't':
792 case 'w':
793 (*info->fprintf_func) (info->stream, "%s",
794 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
795 break;
796
797 case 'i':
798 case 'u':
799 (*info->fprintf_func) (info->stream, "0x%x",
800 (l >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE);
801 break;
802
803 case 'j': /* Same as i, but sign-extended. */
804 case 'o':
805 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
806 if (delta & 0x8000)
807 delta |= ~0xffff;
808 (*info->fprintf_func) (info->stream, "%d",
809 delta);
810 break;
811
812 case 'h':
813 (*info->fprintf_func) (info->stream, "0x%x",
814 (unsigned int) ((l >> OP_SH_PREFX)
815 & OP_MASK_PREFX));
816 break;
817
818 case 'k':
819 (*info->fprintf_func) (info->stream, "0x%x",
820 (unsigned int) ((l >> OP_SH_CACHE)
821 & OP_MASK_CACHE));
822 break;
823
824 case 'a':
825 info->target = (((pc + 4) & ~(bfd_vma) 0x0fffffff)
826 | (((l >> OP_SH_TARGET) & OP_MASK_TARGET) << 2));
827 (*info->print_address_func) (info->target, info);
828 break;
829
830 case 'p':
831 /* Sign extend the displacement. */
832 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
833 if (delta & 0x8000)
834 delta |= ~0xffff;
835 info->target = (delta << 2) + pc + INSNLEN;
836 (*info->print_address_func) (info->target, info);
837 break;
838
839 case 'd':
840 (*info->fprintf_func) (info->stream, "%s",
841 mips_gpr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
842 break;
843
844 case 'U':
845 {
846 /* First check for both rd and rt being equal. */
847 unsigned int reg = (l >> OP_SH_RD) & OP_MASK_RD;
848 if (reg == ((l >> OP_SH_RT) & OP_MASK_RT))
849 (*info->fprintf_func) (info->stream, "%s",
850 mips_gpr_names[reg]);
851 else
852 {
853 /* If one is zero use the other. */
854 if (reg == 0)
855 (*info->fprintf_func) (info->stream, "%s",
856 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
857 else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0)
858 (*info->fprintf_func) (info->stream, "%s",
859 mips_gpr_names[reg]);
860 else /* Bogus, result depends on processor. */
861 (*info->fprintf_func) (info->stream, "%s or %s",
862 mips_gpr_names[reg],
863 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
864 }
865 }
866 break;
867
868 case 'z':
869 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
870 break;
871
872 case '<':
873 (*info->fprintf_func) (info->stream, "0x%x",
874 (l >> OP_SH_SHAMT) & OP_MASK_SHAMT);
875 break;
876
877 case 'c':
878 (*info->fprintf_func) (info->stream, "0x%x",
879 (l >> OP_SH_CODE) & OP_MASK_CODE);
880 break;
881
882 case 'q':
883 (*info->fprintf_func) (info->stream, "0x%x",
884 (l >> OP_SH_CODE2) & OP_MASK_CODE2);
885 break;
886
887 case 'C':
888 (*info->fprintf_func) (info->stream, "0x%x",
889 (l >> OP_SH_COPZ) & OP_MASK_COPZ);
890 break;
891
892 case 'B':
893 (*info->fprintf_func) (info->stream, "0x%x",
894 (l >> OP_SH_CODE20) & OP_MASK_CODE20);
895 break;
896
897 case 'J':
898 (*info->fprintf_func) (info->stream, "0x%x",
899 (l >> OP_SH_CODE19) & OP_MASK_CODE19);
900 break;
901
902 case 'S':
903 case 'V':
904 (*info->fprintf_func) (info->stream, "%s",
905 mips_fpr_names[(l >> OP_SH_FS) & OP_MASK_FS]);
906 break;
907
908 case 'T':
909 case 'W':
910 (*info->fprintf_func) (info->stream, "%s",
911 mips_fpr_names[(l >> OP_SH_FT) & OP_MASK_FT]);
912 break;
913
914 case 'D':
915 (*info->fprintf_func) (info->stream, "%s",
916 mips_fpr_names[(l >> OP_SH_FD) & OP_MASK_FD]);
917 break;
918
919 case 'R':
920 (*info->fprintf_func) (info->stream, "%s",
921 mips_fpr_names[(l >> OP_SH_FR) & OP_MASK_FR]);
922 break;
923
924 case 'E':
925 /* Coprocessor register for lwcN instructions, et al.
926
927 Note that there is no load/store cp0 instructions, and
928 that FPU (cp1) instructions disassemble this field using
929 'T' format. Therefore, until we gain understanding of
930 cp2 register names, we can simply print the register
931 numbers. */
932 (*info->fprintf_func) (info->stream, "$%d",
933 (l >> OP_SH_RT) & OP_MASK_RT);
934 break;
935
936 case 'G':
937 /* Coprocessor register for mtcN instructions, et al. Note
938 that FPU (cp1) instructions disassemble this field using
939 'S' format. Therefore, we only need to worry about cp0,
940 cp2, and cp3. */
941 op = (l >> OP_SH_OP) & OP_MASK_OP;
942 if (op == OP_OP_COP0)
943 (*info->fprintf_func) (info->stream, "%s",
944 mips_cp0_names[(l >> OP_SH_RD) & OP_MASK_RD]);
945 else
946 (*info->fprintf_func) (info->stream, "$%d",
947 (l >> OP_SH_RD) & OP_MASK_RD);
948 break;
949
950 case 'K':
951 (*info->fprintf_func) (info->stream, "%s",
952 mips_hwr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
953 break;
954
955 case 'N':
956 (*info->fprintf_func) (info->stream, "$fcc%d",
957 (l >> OP_SH_BCC) & OP_MASK_BCC);
958 break;
959
960 case 'M':
961 (*info->fprintf_func) (info->stream, "$fcc%d",
962 (l >> OP_SH_CCC) & OP_MASK_CCC);
963 break;
964
965 case 'P':
966 (*info->fprintf_func) (info->stream, "%d",
967 (l >> OP_SH_PERFREG) & OP_MASK_PERFREG);
968 break;
969
970 case 'e':
971 (*info->fprintf_func) (info->stream, "%d",
972 (l >> OP_SH_VECBYTE) & OP_MASK_VECBYTE);
973 break;
974
975 case '%':
976 (*info->fprintf_func) (info->stream, "%d",
977 (l >> OP_SH_VECALIGN) & OP_MASK_VECALIGN);
978 break;
979
980 case 'H':
981 (*info->fprintf_func) (info->stream, "%d",
982 (l >> OP_SH_SEL) & OP_MASK_SEL);
983 break;
984
985 case 'O':
986 (*info->fprintf_func) (info->stream, "%d",
987 (l >> OP_SH_ALN) & OP_MASK_ALN);
988 break;
989
990 case 'Q':
991 {
992 unsigned int vsel = (l >> OP_SH_VSEL) & OP_MASK_VSEL;
993
994 if ((vsel & 0x10) == 0)
995 {
996 int fmt;
997
998 vsel &= 0x0f;
999 for (fmt = 0; fmt < 3; fmt++, vsel >>= 1)
1000 if ((vsel & 1) == 0)
1001 break;
1002 (*info->fprintf_func) (info->stream, "$v%d[%d]",
1003 (l >> OP_SH_FT) & OP_MASK_FT,
1004 vsel >> 1);
1005 }
1006 else if ((vsel & 0x08) == 0)
1007 {
1008 (*info->fprintf_func) (info->stream, "$v%d",
1009 (l >> OP_SH_FT) & OP_MASK_FT);
1010 }
1011 else
1012 {
1013 (*info->fprintf_func) (info->stream, "0x%x",
1014 (l >> OP_SH_FT) & OP_MASK_FT);
1015 }
1016 }
1017 break;
1018
1019 case 'X':
1020 (*info->fprintf_func) (info->stream, "$v%d",
1021 (l >> OP_SH_FD) & OP_MASK_FD);
1022 break;
1023
1024 case 'Y':
1025 (*info->fprintf_func) (info->stream, "$v%d",
1026 (l >> OP_SH_FS) & OP_MASK_FS);
1027 break;
1028
1029 case 'Z':
1030 (*info->fprintf_func) (info->stream, "$v%d",
1031 (l >> OP_SH_FT) & OP_MASK_FT);
1032 break;
1033
1034 default:
1035 /* xgettext:c-format */
1036 (*info->fprintf_func) (info->stream,
1037 _("# internal error, undefined modifier(%c)"),
1038 *d);
1039 return;
1040 }
1041 }
1042 }
1043
1044 /* Print the mips instruction at address MEMADDR in debugged memory,
1045 on using INFO. Returns length of the instruction, in bytes, which is
1046 always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if
1047 this is little-endian code. */
1048
1049 static int
print_insn_mips(bfd_vma memaddr,unsigned long int word,struct disassemble_info * info)1050 print_insn_mips (bfd_vma memaddr,
1051 unsigned long int word,
1052 struct disassemble_info *info)
1053 {
1054 const struct mips_opcode *op;
1055 static bfd_boolean init = 0;
1056 static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
1057
1058 /* Build a hash table to shorten the search time. */
1059 if (! init)
1060 {
1061 unsigned int i;
1062
1063 for (i = 0; i <= OP_MASK_OP; i++)
1064 {
1065 for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++)
1066 {
1067 if (op->pinfo == INSN_MACRO
1068 || (no_aliases && (op->pinfo2 & INSN2_ALIAS)))
1069 continue;
1070 if (i == ((op->match >> OP_SH_OP) & OP_MASK_OP))
1071 {
1072 mips_hash[i] = op;
1073 break;
1074 }
1075 }
1076 }
1077
1078 init = 1;
1079 }
1080
1081 info->bytes_per_chunk = INSNLEN;
1082 info->display_endian = info->endian;
1083 info->insn_info_valid = 1;
1084 info->branch_delay_insns = 0;
1085 info->data_size = 0;
1086 info->insn_type = dis_nonbranch;
1087 info->target = 0;
1088 info->target2 = 0;
1089
1090 op = mips_hash[(word >> OP_SH_OP) & OP_MASK_OP];
1091 if (op != NULL)
1092 {
1093 for (; op < &mips_opcodes[NUMOPCODES]; op++)
1094 {
1095 if (op->pinfo != INSN_MACRO
1096 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1097 && (word & op->mask) == op->match)
1098 {
1099 const char *d;
1100
1101 /* We always allow to disassemble the jalx instruction. */
1102 if (! OPCODE_IS_MEMBER (op, mips_isa, mips_processor)
1103 && strcmp (op->name, "jalx"))
1104 continue;
1105
1106 /* Figure out instruction type and branch delay information. */
1107 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1108 {
1109 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1110 info->insn_type = dis_jsr;
1111 else
1112 info->insn_type = dis_branch;
1113 info->branch_delay_insns = 1;
1114 }
1115 else if ((op->pinfo & (INSN_COND_BRANCH_DELAY
1116 | INSN_COND_BRANCH_LIKELY)) != 0)
1117 {
1118 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1119 info->insn_type = dis_condjsr;
1120 else
1121 info->insn_type = dis_condbranch;
1122 info->branch_delay_insns = 1;
1123 }
1124 else if ((op->pinfo & (INSN_STORE_MEMORY
1125 | INSN_LOAD_MEMORY_DELAY)) != 0)
1126 info->insn_type = dis_dref;
1127
1128 (*info->fprintf_func) (info->stream, "%s", op->name);
1129
1130 d = op->args;
1131 if (d != NULL && *d != '\0')
1132 {
1133 (*info->fprintf_func) (info->stream, "\t");
1134 print_insn_args (d, word, memaddr, info);
1135 }
1136
1137 return INSNLEN;
1138 }
1139 }
1140 }
1141
1142 /* Handle undefined instructions. */
1143 info->insn_type = dis_noninsn;
1144 (*info->fprintf_func) (info->stream, "0x%x", word);
1145 return INSNLEN;
1146 }
1147
1148 /* Disassemble an operand for a mips16 instruction. */
1149
1150 static void
print_mips16_insn_arg(char type,const struct mips_opcode * op,int l,bfd_boolean use_extend,int extend,bfd_vma memaddr,struct disassemble_info * info)1151 print_mips16_insn_arg (char type,
1152 const struct mips_opcode *op,
1153 int l,
1154 bfd_boolean use_extend,
1155 int extend,
1156 bfd_vma memaddr,
1157 struct disassemble_info *info)
1158 {
1159 switch (type)
1160 {
1161 case ',':
1162 case '(':
1163 case ')':
1164 (*info->fprintf_func) (info->stream, "%c", type);
1165 break;
1166
1167 case 'y':
1168 case 'w':
1169 (*info->fprintf_func) (info->stream, "%s",
1170 mips16_reg_names[((l >> MIPS16OP_SH_RY)
1171 & MIPS16OP_MASK_RY)]);
1172 break;
1173
1174 case 'x':
1175 case 'v':
1176 (*info->fprintf_func) (info->stream, "%s",
1177 mips16_reg_names[((l >> MIPS16OP_SH_RX)
1178 & MIPS16OP_MASK_RX)]);
1179 break;
1180
1181 case 'z':
1182 (*info->fprintf_func) (info->stream, "%s",
1183 mips16_reg_names[((l >> MIPS16OP_SH_RZ)
1184 & MIPS16OP_MASK_RZ)]);
1185 break;
1186
1187 case 'Z':
1188 (*info->fprintf_func) (info->stream, "%s",
1189 mips16_reg_names[((l >> MIPS16OP_SH_MOVE32Z)
1190 & MIPS16OP_MASK_MOVE32Z)]);
1191 break;
1192
1193 case '0':
1194 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
1195 break;
1196
1197 case 'S':
1198 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[29]);
1199 break;
1200
1201 case 'P':
1202 (*info->fprintf_func) (info->stream, "$pc");
1203 break;
1204
1205 case 'R':
1206 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[31]);
1207 break;
1208
1209 case 'X':
1210 (*info->fprintf_func) (info->stream, "%s",
1211 mips_gpr_names[((l >> MIPS16OP_SH_REGR32)
1212 & MIPS16OP_MASK_REGR32)]);
1213 break;
1214
1215 case 'Y':
1216 (*info->fprintf_func) (info->stream, "%s",
1217 mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
1218 break;
1219
1220 case '<':
1221 case '>':
1222 case '[':
1223 case ']':
1224 case '4':
1225 case '5':
1226 case 'H':
1227 case 'W':
1228 case 'D':
1229 case 'j':
1230 case '6':
1231 case '8':
1232 case 'V':
1233 case 'C':
1234 case 'U':
1235 case 'k':
1236 case 'K':
1237 case 'p':
1238 case 'q':
1239 case 'A':
1240 case 'B':
1241 case 'E':
1242 {
1243 int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;
1244
1245 shift = 0;
1246 signedp = 0;
1247 extbits = 16;
1248 pcrel = 0;
1249 extu = 0;
1250 branch = 0;
1251 switch (type)
1252 {
1253 case '<':
1254 nbits = 3;
1255 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1256 extbits = 5;
1257 extu = 1;
1258 break;
1259 case '>':
1260 nbits = 3;
1261 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1262 extbits = 5;
1263 extu = 1;
1264 break;
1265 case '[':
1266 nbits = 3;
1267 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1268 extbits = 6;
1269 extu = 1;
1270 break;
1271 case ']':
1272 nbits = 3;
1273 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1274 extbits = 6;
1275 extu = 1;
1276 break;
1277 case '4':
1278 nbits = 4;
1279 immed = (l >> MIPS16OP_SH_IMM4) & MIPS16OP_MASK_IMM4;
1280 signedp = 1;
1281 extbits = 15;
1282 break;
1283 case '5':
1284 nbits = 5;
1285 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1286 info->insn_type = dis_dref;
1287 info->data_size = 1;
1288 break;
1289 case 'H':
1290 nbits = 5;
1291 shift = 1;
1292 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1293 info->insn_type = dis_dref;
1294 info->data_size = 2;
1295 break;
1296 case 'W':
1297 nbits = 5;
1298 shift = 2;
1299 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1300 if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
1301 && (op->pinfo & MIPS16_INSN_READ_SP) == 0)
1302 {
1303 info->insn_type = dis_dref;
1304 info->data_size = 4;
1305 }
1306 break;
1307 case 'D':
1308 nbits = 5;
1309 shift = 3;
1310 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1311 info->insn_type = dis_dref;
1312 info->data_size = 8;
1313 break;
1314 case 'j':
1315 nbits = 5;
1316 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1317 signedp = 1;
1318 break;
1319 case '6':
1320 nbits = 6;
1321 immed = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1322 break;
1323 case '8':
1324 nbits = 8;
1325 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1326 break;
1327 case 'V':
1328 nbits = 8;
1329 shift = 2;
1330 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1331 /* FIXME: This might be lw, or it might be addiu to $sp or
1332 $pc. We assume it's load. */
1333 info->insn_type = dis_dref;
1334 info->data_size = 4;
1335 break;
1336 case 'C':
1337 nbits = 8;
1338 shift = 3;
1339 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1340 info->insn_type = dis_dref;
1341 info->data_size = 8;
1342 break;
1343 case 'U':
1344 nbits = 8;
1345 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1346 extu = 1;
1347 break;
1348 case 'k':
1349 nbits = 8;
1350 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1351 signedp = 1;
1352 break;
1353 case 'K':
1354 nbits = 8;
1355 shift = 3;
1356 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1357 signedp = 1;
1358 break;
1359 case 'p':
1360 nbits = 8;
1361 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1362 signedp = 1;
1363 pcrel = 1;
1364 branch = 1;
1365 info->insn_type = dis_condbranch;
1366 break;
1367 case 'q':
1368 nbits = 11;
1369 immed = (l >> MIPS16OP_SH_IMM11) & MIPS16OP_MASK_IMM11;
1370 signedp = 1;
1371 pcrel = 1;
1372 branch = 1;
1373 info->insn_type = dis_branch;
1374 break;
1375 case 'A':
1376 nbits = 8;
1377 shift = 2;
1378 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1379 pcrel = 1;
1380 /* FIXME: This can be lw or la. We assume it is lw. */
1381 info->insn_type = dis_dref;
1382 info->data_size = 4;
1383 break;
1384 case 'B':
1385 nbits = 5;
1386 shift = 3;
1387 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1388 pcrel = 1;
1389 info->insn_type = dis_dref;
1390 info->data_size = 8;
1391 break;
1392 case 'E':
1393 nbits = 5;
1394 shift = 2;
1395 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1396 pcrel = 1;
1397 break;
1398 default:
1399 abort ();
1400 }
1401
1402 if (! use_extend)
1403 {
1404 if (signedp && immed >= (1 << (nbits - 1)))
1405 immed -= 1 << nbits;
1406 immed <<= shift;
1407 if ((type == '<' || type == '>' || type == '[' || type == ']')
1408 && immed == 0)
1409 immed = 8;
1410 }
1411 else
1412 {
1413 if (extbits == 16)
1414 immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
1415 else if (extbits == 15)
1416 immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
1417 else
1418 immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
1419 immed &= (1 << extbits) - 1;
1420 if (! extu && immed >= (1 << (extbits - 1)))
1421 immed -= 1 << extbits;
1422 }
1423
1424 if (! pcrel)
1425 (*info->fprintf_func) (info->stream, "%d", immed);
1426 else
1427 {
1428 bfd_vma baseaddr;
1429
1430 if (branch)
1431 {
1432 immed *= 2;
1433 baseaddr = memaddr + 2;
1434 }
1435 else if (use_extend)
1436 baseaddr = memaddr - 2;
1437 else
1438 {
1439 int status;
1440 bfd_byte buffer[2];
1441
1442 baseaddr = memaddr;
1443
1444 /* If this instruction is in the delay slot of a jr
1445 instruction, the base address is the address of the
1446 jr instruction. If it is in the delay slot of jalr
1447 instruction, the base address is the address of the
1448 jalr instruction. This test is unreliable: we have
1449 no way of knowing whether the previous word is
1450 instruction or data. */
1451 status = (*info->read_memory_func) (memaddr - 4, buffer, 2,
1452 info);
1453 if (status == 0
1454 && (((info->endian == BFD_ENDIAN_BIG
1455 ? bfd_getb16 (buffer)
1456 : bfd_getl16 (buffer))
1457 & 0xf800) == 0x1800))
1458 baseaddr = memaddr - 4;
1459 else
1460 {
1461 status = (*info->read_memory_func) (memaddr - 2, buffer,
1462 2, info);
1463 if (status == 0
1464 && (((info->endian == BFD_ENDIAN_BIG
1465 ? bfd_getb16 (buffer)
1466 : bfd_getl16 (buffer))
1467 & 0xf81f) == 0xe800))
1468 baseaddr = memaddr - 2;
1469 }
1470 }
1471 info->target = (baseaddr & ~((1 << shift) - 1)) + immed;
1472 (*info->print_address_func) (info->target, info);
1473 }
1474 }
1475 break;
1476
1477 case 'a':
1478 if (! use_extend)
1479 extend = 0;
1480 l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
1481 info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
1482 (*info->print_address_func) (info->target, info);
1483 info->insn_type = dis_jsr;
1484 info->branch_delay_insns = 1;
1485 break;
1486
1487 case 'l':
1488 case 'L':
1489 {
1490 int need_comma, amask, smask;
1491
1492 need_comma = 0;
1493
1494 l = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1495
1496 amask = (l >> 3) & 7;
1497
1498 if (amask > 0 && amask < 5)
1499 {
1500 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[4]);
1501 if (amask > 1)
1502 (*info->fprintf_func) (info->stream, "-%s",
1503 mips_gpr_names[amask + 3]);
1504 need_comma = 1;
1505 }
1506
1507 smask = (l >> 1) & 3;
1508 if (smask == 3)
1509 {
1510 (*info->fprintf_func) (info->stream, "%s??",
1511 need_comma ? "," : "");
1512 need_comma = 1;
1513 }
1514 else if (smask > 0)
1515 {
1516 (*info->fprintf_func) (info->stream, "%s%s",
1517 need_comma ? "," : "",
1518 mips_gpr_names[16]);
1519 if (smask > 1)
1520 (*info->fprintf_func) (info->stream, "-%s",
1521 mips_gpr_names[smask + 15]);
1522 need_comma = 1;
1523 }
1524
1525 if (l & 1)
1526 {
1527 (*info->fprintf_func) (info->stream, "%s%s",
1528 need_comma ? "," : "",
1529 mips_gpr_names[31]);
1530 need_comma = 1;
1531 }
1532
1533 if (amask == 5 || amask == 6)
1534 {
1535 (*info->fprintf_func) (info->stream, "%s$f0",
1536 need_comma ? "," : "");
1537 if (amask == 6)
1538 (*info->fprintf_func) (info->stream, "-$f1");
1539 }
1540 }
1541 break;
1542
1543 default:
1544 /* xgettext:c-format */
1545 (*info->fprintf_func)
1546 (info->stream,
1547 _("# internal disassembler error, unrecognised modifier (%c)"),
1548 type);
1549 abort ();
1550 }
1551 }
1552
1553 /* Disassemble mips16 instructions. */
1554
1555 static int
print_insn_mips16(bfd_vma memaddr,struct disassemble_info * info)1556 print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
1557 {
1558 int status;
1559 bfd_byte buffer[2];
1560 int length;
1561 int insn;
1562 bfd_boolean use_extend;
1563 int extend = 0;
1564 const struct mips_opcode *op, *opend;
1565
1566 info->bytes_per_chunk = 2;
1567 info->display_endian = info->endian;
1568 info->insn_info_valid = 1;
1569 info->branch_delay_insns = 0;
1570 info->data_size = 0;
1571 info->insn_type = dis_nonbranch;
1572 info->target = 0;
1573 info->target2 = 0;
1574
1575 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1576 if (status != 0)
1577 {
1578 (*info->memory_error_func) (status, memaddr, info);
1579 return -1;
1580 }
1581
1582 length = 2;
1583
1584 if (info->endian == BFD_ENDIAN_BIG)
1585 insn = bfd_getb16 (buffer);
1586 else
1587 insn = bfd_getl16 (buffer);
1588
1589 /* Handle the extend opcode specially. */
1590 use_extend = FALSE;
1591 if ((insn & 0xf800) == 0xf000)
1592 {
1593 use_extend = TRUE;
1594 extend = insn & 0x7ff;
1595
1596 memaddr += 2;
1597
1598 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1599 if (status != 0)
1600 {
1601 (*info->fprintf_func) (info->stream, "extend 0x%x",
1602 (unsigned int) extend);
1603 (*info->memory_error_func) (status, memaddr, info);
1604 return -1;
1605 }
1606
1607 if (info->endian == BFD_ENDIAN_BIG)
1608 insn = bfd_getb16 (buffer);
1609 else
1610 insn = bfd_getl16 (buffer);
1611
1612 /* Check for an extend opcode followed by an extend opcode. */
1613 if ((insn & 0xf800) == 0xf000)
1614 {
1615 (*info->fprintf_func) (info->stream, "extend 0x%x",
1616 (unsigned int) extend);
1617 info->insn_type = dis_noninsn;
1618 return length;
1619 }
1620
1621 length += 2;
1622 }
1623
1624 /* FIXME: Should probably use a hash table on the major opcode here. */
1625
1626 opend = mips16_opcodes + bfd_mips16_num_opcodes;
1627 for (op = mips16_opcodes; op < opend; op++)
1628 {
1629 if (op->pinfo != INSN_MACRO
1630 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1631 && (insn & op->mask) == op->match)
1632 {
1633 const char *s;
1634
1635 if (strchr (op->args, 'a') != NULL)
1636 {
1637 if (use_extend)
1638 {
1639 (*info->fprintf_func) (info->stream, "extend 0x%x",
1640 (unsigned int) extend);
1641 info->insn_type = dis_noninsn;
1642 return length - 2;
1643 }
1644
1645 use_extend = FALSE;
1646
1647 memaddr += 2;
1648
1649 status = (*info->read_memory_func) (memaddr, buffer, 2,
1650 info);
1651 if (status == 0)
1652 {
1653 use_extend = TRUE;
1654 if (info->endian == BFD_ENDIAN_BIG)
1655 extend = bfd_getb16 (buffer);
1656 else
1657 extend = bfd_getl16 (buffer);
1658 length += 2;
1659 }
1660 }
1661
1662 (*info->fprintf_func) (info->stream, "%s", op->name);
1663 if (op->args[0] != '\0')
1664 (*info->fprintf_func) (info->stream, "\t");
1665
1666 for (s = op->args; *s != '\0'; s++)
1667 {
1668 if (*s == ','
1669 && s[1] == 'w'
1670 && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
1671 == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
1672 {
1673 /* Skip the register and the comma. */
1674 ++s;
1675 continue;
1676 }
1677 if (*s == ','
1678 && s[1] == 'v'
1679 && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
1680 == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
1681 {
1682 /* Skip the register and the comma. */
1683 ++s;
1684 continue;
1685 }
1686 print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
1687 info);
1688 }
1689
1690 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1691 {
1692 info->branch_delay_insns = 1;
1693 if (info->insn_type != dis_jsr)
1694 info->insn_type = dis_branch;
1695 }
1696
1697 return length;
1698 }
1699 }
1700
1701 if (use_extend)
1702 (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
1703 (*info->fprintf_func) (info->stream, "0x%x", insn);
1704 info->insn_type = dis_noninsn;
1705
1706 return length;
1707 }
1708
1709 /* In an environment where we do not know the symbol type of the
1710 instruction we are forced to assume that the low order bit of the
1711 instructions' address may mark it as a mips16 instruction. If we
1712 are single stepping, or the pc is within the disassembled function,
1713 this works. Otherwise, we need a clue. Sometimes. */
1714
1715 static int
_print_insn_mips(bfd_vma memaddr,struct disassemble_info * info,enum bfd_endian endianness)1716 _print_insn_mips (bfd_vma memaddr,
1717 struct disassemble_info *info,
1718 enum bfd_endian endianness)
1719 {
1720 bfd_byte buffer[INSNLEN];
1721 int status;
1722
1723 set_default_mips_dis_options (info);
1724 parse_mips_dis_options (info->disassembler_options);
1725
1726 #if 1
1727 /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
1728 /* Only a few tools will work this way. */
1729 if (memaddr & 0x01)
1730 return print_insn_mips16 (memaddr, info);
1731 #endif
1732
1733 #if SYMTAB_AVAILABLE
1734 if (info->mach == bfd_mach_mips16
1735 || (info->flavour == bfd_target_elf_flavour
1736 && info->symbols != NULL
1737 && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
1738 == STO_MIPS16)))
1739 return print_insn_mips16 (memaddr, info);
1740 #endif
1741
1742 status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
1743 if (status == 0)
1744 {
1745 unsigned long insn;
1746
1747 if (endianness == BFD_ENDIAN_BIG)
1748 insn = (unsigned long) bfd_getb32 (buffer);
1749 else
1750 insn = (unsigned long) bfd_getl32 (buffer);
1751
1752 return print_insn_mips (memaddr, insn, info);
1753 }
1754 else
1755 {
1756 (*info->memory_error_func) (status, memaddr, info);
1757 return -1;
1758 }
1759 }
1760
1761 int
print_insn_big_mips(bfd_vma memaddr,struct disassemble_info * info)1762 print_insn_big_mips (bfd_vma memaddr, struct disassemble_info *info)
1763 {
1764 return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
1765 }
1766
1767 int
print_insn_little_mips(bfd_vma memaddr,struct disassemble_info * info)1768 print_insn_little_mips (bfd_vma memaddr, struct disassemble_info *info)
1769 {
1770 return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
1771 }
1772
1773 void
print_mips_disassembler_options(FILE * stream)1774 print_mips_disassembler_options (FILE *stream)
1775 {
1776 unsigned int i;
1777
1778 fprintf (stream, _("\n\
1779 The following MIPS specific disassembler options are supported for use\n\
1780 with the -M switch (multiple options should be separated by commas):\n"));
1781
1782 fprintf (stream, _("\n\
1783 gpr-names=ABI Print GPR names according to specified ABI.\n\
1784 Default: based on binary being disassembled.\n"));
1785
1786 fprintf (stream, _("\n\
1787 fpr-names=ABI Print FPR names according to specified ABI.\n\
1788 Default: numeric.\n"));
1789
1790 fprintf (stream, _("\n\
1791 cp0-names=ARCH Print CP0 register names according to\n\
1792 specified architecture.\n\
1793 Default: based on binary being disassembled.\n"));
1794
1795 fprintf (stream, _("\n\
1796 hwr-names=ARCH Print HWR names according to specified \n\
1797 architecture.\n\
1798 Default: based on binary being disassembled.\n"));
1799
1800 fprintf (stream, _("\n\
1801 reg-names=ABI Print GPR and FPR names according to\n\
1802 specified ABI.\n"));
1803
1804 fprintf (stream, _("\n\
1805 reg-names=ARCH Print CP0 register and HWR names according to\n\
1806 specified architecture.\n"));
1807
1808 fprintf (stream, _("\n\
1809 For the options above, the following values are supported for \"ABI\":\n\
1810 "));
1811 for (i = 0; i < ARRAY_SIZE (mips_abi_choices); i++)
1812 fprintf (stream, " %s", mips_abi_choices[i].name);
1813 fprintf (stream, _("\n"));
1814
1815 fprintf (stream, _("\n\
1816 For the options above, The following values are supported for \"ARCH\":\n\
1817 "));
1818 for (i = 0; i < ARRAY_SIZE (mips_arch_choices); i++)
1819 if (*mips_arch_choices[i].name != '\0')
1820 fprintf (stream, " %s", mips_arch_choices[i].name);
1821 fprintf (stream, _("\n"));
1822
1823 fprintf (stream, _("\n"));
1824 }
1825