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[binutils.git] / opcodes / mips-dis.c
blob644eac7addef0b60e48dbcd2d6ffd6aa49ebd07e
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 \f
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 | INSN_DSP,
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 | INSN_DSP,
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 | INSN_DSP,
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 | INSN_DSP,
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 \f
424 static const struct mips_abi_choice *
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 *
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 *
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
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
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
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
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 *
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 \f
685 /* Print insn arguments for 32/64-bit code. */
686
687 static void
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 '3':
784 (*info->fprintf_func) (info->stream, "0x%lx",
785 (l >> OP_SH_SA3) & OP_MASK_SA3);
786 break;
787
788 case '4':
789 (*info->fprintf_func) (info->stream, "0x%lx",
790 (l >> OP_SH_SA4) & OP_MASK_SA4);
791 break;
792
793 case '5':
794 (*info->fprintf_func) (info->stream, "0x%lx",
795 (l >> OP_SH_IMM8) & OP_MASK_IMM8);
796 break;
797
798 case '6':
799 (*info->fprintf_func) (info->stream, "0x%lx",
800 (l >> OP_SH_RS) & OP_MASK_RS);
801 break;
802
803 case '7':
804 (*info->fprintf_func) (info->stream, "$ac%ld",
805 (l >> OP_SH_DSPACC) & OP_MASK_DSPACC);
806 break;
807
808 case '8':
809 (*info->fprintf_func) (info->stream, "0x%lx",
810 (l >> OP_SH_WRDSP) & OP_MASK_WRDSP);
811 break;
812
813 case '9':
814 (*info->fprintf_func) (info->stream, "$ac%ld",
815 (l >> OP_SH_DSPACC_S) & OP_MASK_DSPACC_S);
816 break;
817
818 case '0': /* dsp 6-bit signed immediate in bit 20 */
819 delta = ((l >> OP_SH_DSPSFT) & OP_MASK_DSPSFT);
820 if (delta & 0x20) /* test sign bit */
821 delta |= ~OP_MASK_DSPSFT;
822 (*info->fprintf_func) (info->stream, "%d", delta);
823 break;
824
825 case ':': /* dsp 7-bit signed immediate in bit 19 */
826 delta = ((l >> OP_SH_DSPSFT_7) & OP_MASK_DSPSFT_7);
827 if (delta & 0x40) /* test sign bit */
828 delta |= ~OP_MASK_DSPSFT_7;
829 (*info->fprintf_func) (info->stream, "%d", delta);
830 break;
831
832 case '\'':
833 (*info->fprintf_func) (info->stream, "0x%lx",
834 (l >> OP_SH_RDDSP) & OP_MASK_RDDSP);
835 break;
836
837 case '@': /* dsp 10-bit signed immediate in bit 16 */
838 delta = ((l >> OP_SH_IMM10) & OP_MASK_IMM10);
839 if (delta & 0x200) /* test sign bit */
840 delta |= ~OP_MASK_IMM10;
841 (*info->fprintf_func) (info->stream, "%d", delta);
842 break;
843
844 case 's':
845 case 'b':
846 case 'r':
847 case 'v':
848 (*info->fprintf_func) (info->stream, "%s",
849 mips_gpr_names[(l >> OP_SH_RS) & OP_MASK_RS]);
850 break;
851
852 case 't':
853 case 'w':
854 (*info->fprintf_func) (info->stream, "%s",
855 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
856 break;
857
858 case 'i':
859 case 'u':
860 (*info->fprintf_func) (info->stream, "0x%lx",
861 (l >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE);
862 break;
863
864 case 'j': /* Same as i, but sign-extended. */
865 case 'o':
866 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
867 if (delta & 0x8000)
868 delta |= ~0xffff;
869 (*info->fprintf_func) (info->stream, "%d",
870 delta);
871 break;
872
873 case 'h':
874 (*info->fprintf_func) (info->stream, "0x%x",
875 (unsigned int) ((l >> OP_SH_PREFX)
876 & OP_MASK_PREFX));
877 break;
878
879 case 'k':
880 (*info->fprintf_func) (info->stream, "0x%x",
881 (unsigned int) ((l >> OP_SH_CACHE)
882 & OP_MASK_CACHE));
883 break;
884
885 case 'a':
886 info->target = (((pc + 4) & ~(bfd_vma) 0x0fffffff)
887 | (((l >> OP_SH_TARGET) & OP_MASK_TARGET) << 2));
888 (*info->print_address_func) (info->target, info);
889 break;
890
891 case 'p':
892 /* Sign extend the displacement. */
893 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
894 if (delta & 0x8000)
895 delta |= ~0xffff;
896 info->target = (delta << 2) + pc + INSNLEN;
897 (*info->print_address_func) (info->target, info);
898 break;
899
900 case 'd':
901 (*info->fprintf_func) (info->stream, "%s",
902 mips_gpr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
903 break;
904
905 case 'U':
906 {
907 /* First check for both rd and rt being equal. */
908 unsigned int reg = (l >> OP_SH_RD) & OP_MASK_RD;
909 if (reg == ((l >> OP_SH_RT) & OP_MASK_RT))
910 (*info->fprintf_func) (info->stream, "%s",
911 mips_gpr_names[reg]);
912 else
913 {
914 /* If one is zero use the other. */
915 if (reg == 0)
916 (*info->fprintf_func) (info->stream, "%s",
917 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
918 else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0)
919 (*info->fprintf_func) (info->stream, "%s",
920 mips_gpr_names[reg]);
921 else /* Bogus, result depends on processor. */
922 (*info->fprintf_func) (info->stream, "%s or %s",
923 mips_gpr_names[reg],
924 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
925 }
926 }
927 break;
928
929 case 'z':
930 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
931 break;
932
933 case '<':
934 (*info->fprintf_func) (info->stream, "0x%lx",
935 (l >> OP_SH_SHAMT) & OP_MASK_SHAMT);
936 break;
937
938 case 'c':
939 (*info->fprintf_func) (info->stream, "0x%lx",
940 (l >> OP_SH_CODE) & OP_MASK_CODE);
941 break;
942
943 case 'q':
944 (*info->fprintf_func) (info->stream, "0x%lx",
945 (l >> OP_SH_CODE2) & OP_MASK_CODE2);
946 break;
947
948 case 'C':
949 (*info->fprintf_func) (info->stream, "0x%lx",
950 (l >> OP_SH_COPZ) & OP_MASK_COPZ);
951 break;
952
953 case 'B':
954 (*info->fprintf_func) (info->stream, "0x%lx",
955
956 (l >> OP_SH_CODE20) & OP_MASK_CODE20);
957 break;
958
959 case 'J':
960 (*info->fprintf_func) (info->stream, "0x%lx",
961 (l >> OP_SH_CODE19) & OP_MASK_CODE19);
962 break;
963
964 case 'S':
965 case 'V':
966 (*info->fprintf_func) (info->stream, "%s",
967 mips_fpr_names[(l >> OP_SH_FS) & OP_MASK_FS]);
968 break;
969
970 case 'T':
971 case 'W':
972 (*info->fprintf_func) (info->stream, "%s",
973 mips_fpr_names[(l >> OP_SH_FT) & OP_MASK_FT]);
974 break;
975
976 case 'D':
977 (*info->fprintf_func) (info->stream, "%s",
978 mips_fpr_names[(l >> OP_SH_FD) & OP_MASK_FD]);
979 break;
980
981 case 'R':
982 (*info->fprintf_func) (info->stream, "%s",
983 mips_fpr_names[(l >> OP_SH_FR) & OP_MASK_FR]);
984 break;
985
986 case 'E':
987 /* Coprocessor register for lwcN instructions, et al.
988
989 Note that there is no load/store cp0 instructions, and
990 that FPU (cp1) instructions disassemble this field using
991 'T' format. Therefore, until we gain understanding of
992 cp2 register names, we can simply print the register
993 numbers. */
994 (*info->fprintf_func) (info->stream, "$%ld",
995 (l >> OP_SH_RT) & OP_MASK_RT);
996 break;
997
998 case 'G':
999 /* Coprocessor register for mtcN instructions, et al. Note
1000 that FPU (cp1) instructions disassemble this field using
1001 'S' format. Therefore, we only need to worry about cp0,
1002 cp2, and cp3. */
1003 op = (l >> OP_SH_OP) & OP_MASK_OP;
1004 if (op == OP_OP_COP0)
1005 (*info->fprintf_func) (info->stream, "%s",
1006 mips_cp0_names[(l >> OP_SH_RD) & OP_MASK_RD]);
1007 else
1008 (*info->fprintf_func) (info->stream, "$%ld",
1009 (l >> OP_SH_RD) & OP_MASK_RD);
1010 break;
1011
1012 case 'K':
1013 (*info->fprintf_func) (info->stream, "%s",
1014 mips_hwr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
1015 break;
1016
1017 case 'N':
1018 (*info->fprintf_func) (info->stream, "$fcc%ld",
1019 (l >> OP_SH_BCC) & OP_MASK_BCC);
1020 break;
1021
1022 case 'M':
1023 (*info->fprintf_func) (info->stream, "$fcc%ld",
1024 (l >> OP_SH_CCC) & OP_MASK_CCC);
1025 break;
1026
1027 case 'P':
1028 (*info->fprintf_func) (info->stream, "%ld",
1029 (l >> OP_SH_PERFREG) & OP_MASK_PERFREG);
1030 break;
1031
1032 case 'e':
1033 (*info->fprintf_func) (info->stream, "%ld",
1034 (l >> OP_SH_VECBYTE) & OP_MASK_VECBYTE);
1035 break;
1036
1037 case '%':
1038 (*info->fprintf_func) (info->stream, "%ld",
1039 (l >> OP_SH_VECALIGN) & OP_MASK_VECALIGN);
1040 break;
1041
1042 case 'H':
1043 (*info->fprintf_func) (info->stream, "%ld",
1044 (l >> OP_SH_SEL) & OP_MASK_SEL);
1045 break;
1046
1047 case 'O':
1048 (*info->fprintf_func) (info->stream, "%ld",
1049 (l >> OP_SH_ALN) & OP_MASK_ALN);
1050 break;
1051
1052 case 'Q':
1053 {
1054 unsigned int vsel = (l >> OP_SH_VSEL) & OP_MASK_VSEL;
1055
1056 if ((vsel & 0x10) == 0)
1057 {
1058 int fmt;
1059
1060 vsel &= 0x0f;
1061 for (fmt = 0; fmt < 3; fmt++, vsel >>= 1)
1062 if ((vsel & 1) == 0)
1063 break;
1064 (*info->fprintf_func) (info->stream, "$v%ld[%d]",
1065 (l >> OP_SH_FT) & OP_MASK_FT,
1066 vsel >> 1);
1067 }
1068 else if ((vsel & 0x08) == 0)
1069 {
1070 (*info->fprintf_func) (info->stream, "$v%ld",
1071 (l >> OP_SH_FT) & OP_MASK_FT);
1072 }
1073 else
1074 {
1075 (*info->fprintf_func) (info->stream, "0x%lx",
1076 (l >> OP_SH_FT) & OP_MASK_FT);
1077 }
1078 }
1079 break;
1080
1081 case 'X':
1082 (*info->fprintf_func) (info->stream, "$v%ld",
1083 (l >> OP_SH_FD) & OP_MASK_FD);
1084 break;
1085
1086 case 'Y':
1087 (*info->fprintf_func) (info->stream, "$v%ld",
1088 (l >> OP_SH_FS) & OP_MASK_FS);
1089 break;
1090
1091 case 'Z':
1092 (*info->fprintf_func) (info->stream, "$v%ld",
1093 (l >> OP_SH_FT) & OP_MASK_FT);
1094 break;
1095
1096 default:
1097 /* xgettext:c-format */
1098 (*info->fprintf_func) (info->stream,
1099 _("# internal error, undefined modifier(%c)"),
1100 *d);
1101 return;
1102 }
1103 }
1104 }
1105 \f
1106 /* Print the mips instruction at address MEMADDR in debugged memory,
1107 on using INFO. Returns length of the instruction, in bytes, which is
1108 always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if
1109 this is little-endian code. */
1110
1111 static int
1112 print_insn_mips (bfd_vma memaddr,
1113 unsigned long int word,
1114 struct disassemble_info *info)
1115 {
1116 const struct mips_opcode *op;
1117 static bfd_boolean init = 0;
1118 static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
1119
1120 /* Build a hash table to shorten the search time. */
1121 if (! init)
1122 {
1123 unsigned int i;
1124
1125 for (i = 0; i <= OP_MASK_OP; i++)
1126 {
1127 for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++)
1128 {
1129 if (op->pinfo == INSN_MACRO
1130 || (no_aliases && (op->pinfo2 & INSN2_ALIAS)))
1131 continue;
1132 if (i == ((op->match >> OP_SH_OP) & OP_MASK_OP))
1133 {
1134 mips_hash[i] = op;
1135 break;
1136 }
1137 }
1138 }
1139
1140 init = 1;
1141 }
1142
1143 info->bytes_per_chunk = INSNLEN;
1144 info->display_endian = info->endian;
1145 info->insn_info_valid = 1;
1146 info->branch_delay_insns = 0;
1147 info->data_size = 0;
1148 info->insn_type = dis_nonbranch;
1149 info->target = 0;
1150 info->target2 = 0;
1151
1152 op = mips_hash[(word >> OP_SH_OP) & OP_MASK_OP];
1153 if (op != NULL)
1154 {
1155 for (; op < &mips_opcodes[NUMOPCODES]; op++)
1156 {
1157 if (op->pinfo != INSN_MACRO
1158 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1159 && (word & op->mask) == op->match)
1160 {
1161 const char *d;
1162
1163 /* We always allow to disassemble the jalx instruction. */
1164 if (! OPCODE_IS_MEMBER (op, mips_isa, mips_processor)
1165 && strcmp (op->name, "jalx"))
1166 continue;
1167
1168 /* Figure out instruction type and branch delay information. */
1169 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1170 {
1171 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1172 info->insn_type = dis_jsr;
1173 else
1174 info->insn_type = dis_branch;
1175 info->branch_delay_insns = 1;
1176 }
1177 else if ((op->pinfo & (INSN_COND_BRANCH_DELAY
1178 | INSN_COND_BRANCH_LIKELY)) != 0)
1179 {
1180 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1181 info->insn_type = dis_condjsr;
1182 else
1183 info->insn_type = dis_condbranch;
1184 info->branch_delay_insns = 1;
1185 }
1186 else if ((op->pinfo & (INSN_STORE_MEMORY
1187 | INSN_LOAD_MEMORY_DELAY)) != 0)
1188 info->insn_type = dis_dref;
1189
1190 (*info->fprintf_func) (info->stream, "%s", op->name);
1191
1192 d = op->args;
1193 if (d != NULL && *d != '\0')
1194 {
1195 (*info->fprintf_func) (info->stream, "\t");
1196 print_insn_args (d, word, memaddr, info);
1197 }
1198
1199 return INSNLEN;
1200 }
1201 }
1202 }
1203
1204 /* Handle undefined instructions. */
1205 info->insn_type = dis_noninsn;
1206 (*info->fprintf_func) (info->stream, "0x%lx", word);
1207 return INSNLEN;
1208 }
1209 \f
1210 /* Disassemble an operand for a mips16 instruction. */
1211
1212 static void
1213 print_mips16_insn_arg (char type,
1214 const struct mips_opcode *op,
1215 int l,
1216 bfd_boolean use_extend,
1217 int extend,
1218 bfd_vma memaddr,
1219 struct disassemble_info *info)
1220 {
1221 switch (type)
1222 {
1223 case ',':
1224 case '(':
1225 case ')':
1226 (*info->fprintf_func) (info->stream, "%c", type);
1227 break;
1228
1229 case 'y':
1230 case 'w':
1231 (*info->fprintf_func) (info->stream, "%s",
1232 mips16_reg_names[((l >> MIPS16OP_SH_RY)
1233 & MIPS16OP_MASK_RY)]);
1234 break;
1235
1236 case 'x':
1237 case 'v':
1238 (*info->fprintf_func) (info->stream, "%s",
1239 mips16_reg_names[((l >> MIPS16OP_SH_RX)
1240 & MIPS16OP_MASK_RX)]);
1241 break;
1242
1243 case 'z':
1244 (*info->fprintf_func) (info->stream, "%s",
1245 mips16_reg_names[((l >> MIPS16OP_SH_RZ)
1246 & MIPS16OP_MASK_RZ)]);
1247 break;
1248
1249 case 'Z':
1250 (*info->fprintf_func) (info->stream, "%s",
1251 mips16_reg_names[((l >> MIPS16OP_SH_MOVE32Z)
1252 & MIPS16OP_MASK_MOVE32Z)]);
1253 break;
1254
1255 case '0':
1256 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
1257 break;
1258
1259 case 'S':
1260 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[29]);
1261 break;
1262
1263 case 'P':
1264 (*info->fprintf_func) (info->stream, "$pc");
1265 break;
1266
1267 case 'R':
1268 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[31]);
1269 break;
1270
1271 case 'X':
1272 (*info->fprintf_func) (info->stream, "%s",
1273 mips_gpr_names[((l >> MIPS16OP_SH_REGR32)
1274 & MIPS16OP_MASK_REGR32)]);
1275 break;
1276
1277 case 'Y':
1278 (*info->fprintf_func) (info->stream, "%s",
1279 mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
1280 break;
1281
1282 case '<':
1283 case '>':
1284 case '[':
1285 case ']':
1286 case '4':
1287 case '5':
1288 case 'H':
1289 case 'W':
1290 case 'D':
1291 case 'j':
1292 case '6':
1293 case '8':
1294 case 'V':
1295 case 'C':
1296 case 'U':
1297 case 'k':
1298 case 'K':
1299 case 'p':
1300 case 'q':
1301 case 'A':
1302 case 'B':
1303 case 'E':
1304 {
1305 int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;
1306
1307 shift = 0;
1308 signedp = 0;
1309 extbits = 16;
1310 pcrel = 0;
1311 extu = 0;
1312 branch = 0;
1313 switch (type)
1314 {
1315 case '<':
1316 nbits = 3;
1317 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1318 extbits = 5;
1319 extu = 1;
1320 break;
1321 case '>':
1322 nbits = 3;
1323 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1324 extbits = 5;
1325 extu = 1;
1326 break;
1327 case '[':
1328 nbits = 3;
1329 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1330 extbits = 6;
1331 extu = 1;
1332 break;
1333 case ']':
1334 nbits = 3;
1335 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1336 extbits = 6;
1337 extu = 1;
1338 break;
1339 case '4':
1340 nbits = 4;
1341 immed = (l >> MIPS16OP_SH_IMM4) & MIPS16OP_MASK_IMM4;
1342 signedp = 1;
1343 extbits = 15;
1344 break;
1345 case '5':
1346 nbits = 5;
1347 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1348 info->insn_type = dis_dref;
1349 info->data_size = 1;
1350 break;
1351 case 'H':
1352 nbits = 5;
1353 shift = 1;
1354 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1355 info->insn_type = dis_dref;
1356 info->data_size = 2;
1357 break;
1358 case 'W':
1359 nbits = 5;
1360 shift = 2;
1361 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1362 if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
1363 && (op->pinfo & MIPS16_INSN_READ_SP) == 0)
1364 {
1365 info->insn_type = dis_dref;
1366 info->data_size = 4;
1367 }
1368 break;
1369 case 'D':
1370 nbits = 5;
1371 shift = 3;
1372 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1373 info->insn_type = dis_dref;
1374 info->data_size = 8;
1375 break;
1376 case 'j':
1377 nbits = 5;
1378 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1379 signedp = 1;
1380 break;
1381 case '6':
1382 nbits = 6;
1383 immed = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1384 break;
1385 case '8':
1386 nbits = 8;
1387 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1388 break;
1389 case 'V':
1390 nbits = 8;
1391 shift = 2;
1392 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1393 /* FIXME: This might be lw, or it might be addiu to $sp or
1394 $pc. We assume it's load. */
1395 info->insn_type = dis_dref;
1396 info->data_size = 4;
1397 break;
1398 case 'C':
1399 nbits = 8;
1400 shift = 3;
1401 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1402 info->insn_type = dis_dref;
1403 info->data_size = 8;
1404 break;
1405 case 'U':
1406 nbits = 8;
1407 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1408 extu = 1;
1409 break;
1410 case 'k':
1411 nbits = 8;
1412 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1413 signedp = 1;
1414 break;
1415 case 'K':
1416 nbits = 8;
1417 shift = 3;
1418 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1419 signedp = 1;
1420 break;
1421 case 'p':
1422 nbits = 8;
1423 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1424 signedp = 1;
1425 pcrel = 1;
1426 branch = 1;
1427 info->insn_type = dis_condbranch;
1428 break;
1429 case 'q':
1430 nbits = 11;
1431 immed = (l >> MIPS16OP_SH_IMM11) & MIPS16OP_MASK_IMM11;
1432 signedp = 1;
1433 pcrel = 1;
1434 branch = 1;
1435 info->insn_type = dis_branch;
1436 break;
1437 case 'A':
1438 nbits = 8;
1439 shift = 2;
1440 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1441 pcrel = 1;
1442 /* FIXME: This can be lw or la. We assume it is lw. */
1443 info->insn_type = dis_dref;
1444 info->data_size = 4;
1445 break;
1446 case 'B':
1447 nbits = 5;
1448 shift = 3;
1449 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1450 pcrel = 1;
1451 info->insn_type = dis_dref;
1452 info->data_size = 8;
1453 break;
1454 case 'E':
1455 nbits = 5;
1456 shift = 2;
1457 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1458 pcrel = 1;
1459 break;
1460 default:
1461 abort ();
1462 }
1463
1464 if (! use_extend)
1465 {
1466 if (signedp && immed >= (1 << (nbits - 1)))
1467 immed -= 1 << nbits;
1468 immed <<= shift;
1469 if ((type == '<' || type == '>' || type == '[' || type == ']')
1470 && immed == 0)
1471 immed = 8;
1472 }
1473 else
1474 {
1475 if (extbits == 16)
1476 immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
1477 else if (extbits == 15)
1478 immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
1479 else
1480 immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
1481 immed &= (1 << extbits) - 1;
1482 if (! extu && immed >= (1 << (extbits - 1)))
1483 immed -= 1 << extbits;
1484 }
1485
1486 if (! pcrel)
1487 (*info->fprintf_func) (info->stream, "%d", immed);
1488 else
1489 {
1490 bfd_vma baseaddr;
1491
1492 if (branch)
1493 {
1494 immed *= 2;
1495 baseaddr = memaddr + 2;
1496 }
1497 else if (use_extend)
1498 baseaddr = memaddr - 2;
1499 else
1500 {
1501 int status;
1502 bfd_byte buffer[2];
1503
1504 baseaddr = memaddr;
1505
1506 /* If this instruction is in the delay slot of a jr
1507 instruction, the base address is the address of the
1508 jr instruction. If it is in the delay slot of jalr
1509 instruction, the base address is the address of the
1510 jalr instruction. This test is unreliable: we have
1511 no way of knowing whether the previous word is
1512 instruction or data. */
1513 status = (*info->read_memory_func) (memaddr - 4, buffer, 2,
1514 info);
1515 if (status == 0
1516 && (((info->endian == BFD_ENDIAN_BIG
1517 ? bfd_getb16 (buffer)
1518 : bfd_getl16 (buffer))
1519 & 0xf800) == 0x1800))
1520 baseaddr = memaddr - 4;
1521 else
1522 {
1523 status = (*info->read_memory_func) (memaddr - 2, buffer,
1524 2, info);
1525 if (status == 0
1526 && (((info->endian == BFD_ENDIAN_BIG
1527 ? bfd_getb16 (buffer)
1528 : bfd_getl16 (buffer))
1529 & 0xf81f) == 0xe800))
1530 baseaddr = memaddr - 2;
1531 }
1532 }
1533 info->target = (baseaddr & ~((1 << shift) - 1)) + immed;
1534 (*info->print_address_func) (info->target, info);
1535 }
1536 }
1537 break;
1538
1539 case 'a':
1540 if (! use_extend)
1541 extend = 0;
1542 l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
1543 info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
1544 (*info->print_address_func) (info->target, info);
1545 info->insn_type = dis_jsr;
1546 info->branch_delay_insns = 1;
1547 break;
1548
1549 case 'l':
1550 case 'L':
1551 {
1552 int need_comma, amask, smask;
1553
1554 need_comma = 0;
1555
1556 l = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1557
1558 amask = (l >> 3) & 7;
1559
1560 if (amask > 0 && amask < 5)
1561 {
1562 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[4]);
1563 if (amask > 1)
1564 (*info->fprintf_func) (info->stream, "-%s",
1565 mips_gpr_names[amask + 3]);
1566 need_comma = 1;
1567 }
1568
1569 smask = (l >> 1) & 3;
1570 if (smask == 3)
1571 {
1572 (*info->fprintf_func) (info->stream, "%s??",
1573 need_comma ? "," : "");
1574 need_comma = 1;
1575 }
1576 else if (smask > 0)
1577 {
1578 (*info->fprintf_func) (info->stream, "%s%s",
1579 need_comma ? "," : "",
1580 mips_gpr_names[16]);
1581 if (smask > 1)
1582 (*info->fprintf_func) (info->stream, "-%s",
1583 mips_gpr_names[smask + 15]);
1584 need_comma = 1;
1585 }
1586
1587 if (l & 1)
1588 {
1589 (*info->fprintf_func) (info->stream, "%s%s",
1590 need_comma ? "," : "",
1591 mips_gpr_names[31]);
1592 need_comma = 1;
1593 }
1594
1595 if (amask == 5 || amask == 6)
1596 {
1597 (*info->fprintf_func) (info->stream, "%s$f0",
1598 need_comma ? "," : "");
1599 if (amask == 6)
1600 (*info->fprintf_func) (info->stream, "-$f1");
1601 }
1602 }
1603 break;
1604
1605 default:
1606 /* xgettext:c-format */
1607 (*info->fprintf_func)
1608 (info->stream,
1609 _("# internal disassembler error, unrecognised modifier (%c)"),
1610 type);
1611 abort ();
1612 }
1613 }
1614
1615 /* Disassemble mips16 instructions. */
1616
1617 static int
1618 print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
1619 {
1620 int status;
1621 bfd_byte buffer[2];
1622 int length;
1623 int insn;
1624 bfd_boolean use_extend;
1625 int extend = 0;
1626 const struct mips_opcode *op, *opend;
1627
1628 info->bytes_per_chunk = 2;
1629 info->display_endian = info->endian;
1630 info->insn_info_valid = 1;
1631 info->branch_delay_insns = 0;
1632 info->data_size = 0;
1633 info->insn_type = dis_nonbranch;
1634 info->target = 0;
1635 info->target2 = 0;
1636
1637 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1638 if (status != 0)
1639 {
1640 (*info->memory_error_func) (status, memaddr, info);
1641 return -1;
1642 }
1643
1644 length = 2;
1645
1646 if (info->endian == BFD_ENDIAN_BIG)
1647 insn = bfd_getb16 (buffer);
1648 else
1649 insn = bfd_getl16 (buffer);
1650
1651 /* Handle the extend opcode specially. */
1652 use_extend = FALSE;
1653 if ((insn & 0xf800) == 0xf000)
1654 {
1655 use_extend = TRUE;
1656 extend = insn & 0x7ff;
1657
1658 memaddr += 2;
1659
1660 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1661 if (status != 0)
1662 {
1663 (*info->fprintf_func) (info->stream, "extend 0x%x",
1664 (unsigned int) extend);
1665 (*info->memory_error_func) (status, memaddr, info);
1666 return -1;
1667 }
1668
1669 if (info->endian == BFD_ENDIAN_BIG)
1670 insn = bfd_getb16 (buffer);
1671 else
1672 insn = bfd_getl16 (buffer);
1673
1674 /* Check for an extend opcode followed by an extend opcode. */
1675 if ((insn & 0xf800) == 0xf000)
1676 {
1677 (*info->fprintf_func) (info->stream, "extend 0x%x",
1678 (unsigned int) extend);
1679 info->insn_type = dis_noninsn;
1680 return length;
1681 }
1682
1683 length += 2;
1684 }
1685
1686 /* FIXME: Should probably use a hash table on the major opcode here. */
1687
1688 opend = mips16_opcodes + bfd_mips16_num_opcodes;
1689 for (op = mips16_opcodes; op < opend; op++)
1690 {
1691 if (op->pinfo != INSN_MACRO
1692 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1693 && (insn & op->mask) == op->match)
1694 {
1695 const char *s;
1696
1697 if (strchr (op->args, 'a') != NULL)
1698 {
1699 if (use_extend)
1700 {
1701 (*info->fprintf_func) (info->stream, "extend 0x%x",
1702 (unsigned int) extend);
1703 info->insn_type = dis_noninsn;
1704 return length - 2;
1705 }
1706
1707 use_extend = FALSE;
1708
1709 memaddr += 2;
1710
1711 status = (*info->read_memory_func) (memaddr, buffer, 2,
1712 info);
1713 if (status == 0)
1714 {
1715 use_extend = TRUE;
1716 if (info->endian == BFD_ENDIAN_BIG)
1717 extend = bfd_getb16 (buffer);
1718 else
1719 extend = bfd_getl16 (buffer);
1720 length += 2;
1721 }
1722 }
1723
1724 (*info->fprintf_func) (info->stream, "%s", op->name);
1725 if (op->args[0] != '\0')
1726 (*info->fprintf_func) (info->stream, "\t");
1727
1728 for (s = op->args; *s != '\0'; s++)
1729 {
1730 if (*s == ','
1731 && s[1] == 'w'
1732 && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
1733 == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
1734 {
1735 /* Skip the register and the comma. */
1736 ++s;
1737 continue;
1738 }
1739 if (*s == ','
1740 && s[1] == 'v'
1741 && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
1742 == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
1743 {
1744 /* Skip the register and the comma. */
1745 ++s;
1746 continue;
1747 }
1748 print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
1749 info);
1750 }
1751
1752 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1753 {
1754 info->branch_delay_insns = 1;
1755 if (info->insn_type != dis_jsr)
1756 info->insn_type = dis_branch;
1757 }
1758
1759 return length;
1760 }
1761 }
1762
1763 if (use_extend)
1764 (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
1765 (*info->fprintf_func) (info->stream, "0x%x", insn);
1766 info->insn_type = dis_noninsn;
1767
1768 return length;
1769 }
1770
1771 /* In an environment where we do not know the symbol type of the
1772 instruction we are forced to assume that the low order bit of the
1773 instructions' address may mark it as a mips16 instruction. If we
1774 are single stepping, or the pc is within the disassembled function,
1775 this works. Otherwise, we need a clue. Sometimes. */
1776
1777 static int
1778 _print_insn_mips (bfd_vma memaddr,
1779 struct disassemble_info *info,
1780 enum bfd_endian endianness)
1781 {
1782 bfd_byte buffer[INSNLEN];
1783 int status;
1784
1785 set_default_mips_dis_options (info);
1786 parse_mips_dis_options (info->disassembler_options);
1787
1788 #if 1
1789 /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
1790 /* Only a few tools will work this way. */
1791 if (memaddr & 0x01)
1792 return print_insn_mips16 (memaddr, info);
1793 #endif
1794
1795 #if SYMTAB_AVAILABLE
1796 if (info->mach == bfd_mach_mips16
1797 || (info->flavour == bfd_target_elf_flavour
1798 && info->symbols != NULL
1799 && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
1800 == STO_MIPS16)))
1801 return print_insn_mips16 (memaddr, info);
1802 #endif
1803
1804 status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
1805 if (status == 0)
1806 {
1807 unsigned long insn;
1808
1809 if (endianness == BFD_ENDIAN_BIG)
1810 insn = (unsigned long) bfd_getb32 (buffer);
1811 else
1812 insn = (unsigned long) bfd_getl32 (buffer);
1813
1814 return print_insn_mips (memaddr, insn, info);
1815 }
1816 else
1817 {
1818 (*info->memory_error_func) (status, memaddr, info);
1819 return -1;
1820 }
1821 }
1822
1823 int
1824 print_insn_big_mips (bfd_vma memaddr, struct disassemble_info *info)
1825 {
1826 return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
1827 }
1828
1829 int
1830 print_insn_little_mips (bfd_vma memaddr, struct disassemble_info *info)
1831 {
1832 return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
1833 }
1834 \f
1835 void
1836 print_mips_disassembler_options (FILE *stream)
1837 {
1838 unsigned int i;
1839
1840 fprintf (stream, _("\n\
1841 The following MIPS specific disassembler options are supported for use\n\
1842 with the -M switch (multiple options should be separated by commas):\n"));
1843
1844 fprintf (stream, _("\n\
1845 gpr-names=ABI Print GPR names according to specified ABI.\n\
1846 Default: based on binary being disassembled.\n"));
1847
1848 fprintf (stream, _("\n\
1849 fpr-names=ABI Print FPR names according to specified ABI.\n\
1850 Default: numeric.\n"));
1851
1852 fprintf (stream, _("\n\
1853 cp0-names=ARCH Print CP0 register names according to\n\
1854 specified architecture.\n\
1855 Default: based on binary being disassembled.\n"));
1856
1857 fprintf (stream, _("\n\
1858 hwr-names=ARCH Print HWR names according to specified \n\
1859 architecture.\n\
1860 Default: based on binary being disassembled.\n"));
1861
1862 fprintf (stream, _("\n\
1863 reg-names=ABI Print GPR and FPR names according to\n\
1864 specified ABI.\n"));
1865
1866 fprintf (stream, _("\n\
1867 reg-names=ARCH Print CP0 register and HWR names according to\n\
1868 specified architecture.\n"));
1869
1870 fprintf (stream, _("\n\
1871 For the options above, the following values are supported for \"ABI\":\n\
1872 "));
1873 for (i = 0; i < ARRAY_SIZE (mips_abi_choices); i++)
1874 fprintf (stream, " %s", mips_abi_choices[i].name);
1875 fprintf (stream, _("\n"));
1876
1877 fprintf (stream, _("\n\
1878 For the options above, The following values are supported for \"ARCH\":\n\
1879 "));
1880 for (i = 0; i < ARRAY_SIZE (mips_arch_choices); i++)
1881 if (*mips_arch_choices[i].name != '\0')
1882 fprintf (stream, " %s", mips_arch_choices[i].name);
1883 fprintf (stream, _("\n"));
1884
1885 fprintf (stream, _("\n"));
1886 }
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