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[binutils.git] / opcodes / mips-dis.c
blob281c8cf707f627303d505dac04994c29a15d4034
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 #include "sysdep.h"
24 #include "dis-asm.h"
25 #include "libiberty.h"
26 #include "opcode/mips.h"
27 #include "opintl.h"
28
29 /* FIXME: These are needed to figure out if the code is mips16 or
30 not. The low bit of the address is often a good indicator. No
31 symbol table is available when this code runs out in an embedded
32 system as when it is used for disassembler support in a monitor. */
33
34 #if !defined(EMBEDDED_ENV)
35 #define SYMTAB_AVAILABLE 1
36 #include "elf-bfd.h"
37 #include "elf/mips.h"
38 #endif
39
40 /* Mips instructions are at maximum this many bytes long. */
41 #define INSNLEN 4
42
43 static void set_default_mips_dis_options
44 PARAMS ((struct disassemble_info *));
45 static void parse_mips_dis_option
46 PARAMS ((const char *, unsigned int));
47 static void parse_mips_dis_options
48 PARAMS ((const char *));
49 static int _print_insn_mips
50 PARAMS ((bfd_vma, struct disassemble_info *, enum bfd_endian));
51 static int print_insn_mips
52 PARAMS ((bfd_vma, unsigned long int, struct disassemble_info *));
53 static void print_insn_args
54 PARAMS ((const char *, unsigned long, bfd_vma, struct disassemble_info *));
55 static int print_insn_mips16
56 PARAMS ((bfd_vma, struct disassemble_info *));
57 static int is_newabi
58 PARAMS ((Elf_Internal_Ehdr *));
59 static void print_mips16_insn_arg
60 PARAMS ((int, const struct mips_opcode *, int, bfd_boolean, int, bfd_vma,
61 struct disassemble_info *));
62 \f
63 /* FIXME: These should be shared with gdb somehow. */
64
65 struct mips_cp0sel_name {
66 unsigned int cp0reg;
67 unsigned int sel;
68 const char * const name;
69 };
70
71 /* The mips16 register names. */
72 static const char * const mips16_reg_names[] = {
73 "s0", "s1", "v0", "v1", "a0", "a1", "a2", "a3"
74 };
75
76 static const char * const mips_gpr_names_numeric[32] = {
77 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
78 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
79 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
80 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
81 };
82
83 static const char * const mips_gpr_names_oldabi[32] = {
84 "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
85 "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
86 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
87 "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
88 };
89
90 static const char * const mips_gpr_names_newabi[32] = {
91 "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
92 "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
93 "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
94 "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
95 };
96
97 static const char * const mips_fpr_names_numeric[32] = {
98 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
99 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
100 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
101 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"
102 };
103
104 static const char * const mips_fpr_names_32[32] = {
105 "fv0", "fv0f", "fv1", "fv1f", "ft0", "ft0f", "ft1", "ft1f",
106 "ft2", "ft2f", "ft3", "ft3f", "fa0", "fa0f", "fa1", "fa1f",
107 "ft4", "ft4f", "ft5", "ft5f", "fs0", "fs0f", "fs1", "fs1f",
108 "fs2", "fs2f", "fs3", "fs3f", "fs4", "fs4f", "fs5", "fs5f"
109 };
110
111 static const char * const mips_fpr_names_n32[32] = {
112 "fv0", "ft14", "fv1", "ft15", "ft0", "ft1", "ft2", "ft3",
113 "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
114 "fa4", "fa5", "fa6", "fa7", "fs0", "ft8", "fs1", "ft9",
115 "fs2", "ft10", "fs3", "ft11", "fs4", "ft12", "fs5", "ft13"
116 };
117
118 static const char * const mips_fpr_names_64[32] = {
119 "fv0", "ft12", "fv1", "ft13", "ft0", "ft1", "ft2", "ft3",
120 "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
121 "fa4", "fa5", "fa6", "fa7", "ft8", "ft9", "ft10", "ft11",
122 "fs0", "fs1", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7"
123 };
124
125 static const char * const mips_cp0_names_numeric[32] = {
126 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
127 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
128 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
129 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
130 };
131
132 static const char * const mips_cp0_names_mips3264[32] = {
133 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
134 "c0_context", "c0_pagemask", "c0_wired", "$7",
135 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
136 "c0_status", "c0_cause", "c0_epc", "c0_prid",
137 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
138 "c0_xcontext", "$21", "$22", "c0_debug",
139 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
140 "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
141 };
142
143 static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] = {
144 { 16, 1, "c0_config1" },
145 { 16, 2, "c0_config2" },
146 { 16, 3, "c0_config3" },
147 { 18, 1, "c0_watchlo,1" },
148 { 18, 2, "c0_watchlo,2" },
149 { 18, 3, "c0_watchlo,3" },
150 { 18, 4, "c0_watchlo,4" },
151 { 18, 5, "c0_watchlo,5" },
152 { 18, 6, "c0_watchlo,6" },
153 { 18, 7, "c0_watchlo,7" },
154 { 19, 1, "c0_watchhi,1" },
155 { 19, 2, "c0_watchhi,2" },
156 { 19, 3, "c0_watchhi,3" },
157 { 19, 4, "c0_watchhi,4" },
158 { 19, 5, "c0_watchhi,5" },
159 { 19, 6, "c0_watchhi,6" },
160 { 19, 7, "c0_watchhi,7" },
161 { 25, 1, "c0_perfcnt,1" },
162 { 25, 2, "c0_perfcnt,2" },
163 { 25, 3, "c0_perfcnt,3" },
164 { 25, 4, "c0_perfcnt,4" },
165 { 25, 5, "c0_perfcnt,5" },
166 { 25, 6, "c0_perfcnt,6" },
167 { 25, 7, "c0_perfcnt,7" },
168 { 27, 1, "c0_cacheerr,1" },
169 { 27, 2, "c0_cacheerr,2" },
170 { 27, 3, "c0_cacheerr,3" },
171 { 28, 1, "c0_datalo" },
172 { 29, 1, "c0_datahi" }
173 };
174
175 static const char * const mips_cp0_names_mips3264r2[32] = {
176 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
177 "c0_context", "c0_pagemask", "c0_wired", "c0_hwrena",
178 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
179 "c0_status", "c0_cause", "c0_epc", "c0_prid",
180 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
181 "c0_xcontext", "$21", "$22", "c0_debug",
182 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
183 "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
184 };
185
186 static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] = {
187 { 4, 1, "c0_contextconfig" },
188 { 5, 1, "c0_pagegrain" },
189 { 12, 1, "c0_intctl" },
190 { 12, 2, "c0_srsctl" },
191 { 12, 3, "c0_srsmap" },
192 { 15, 1, "c0_ebase" },
193 { 16, 1, "c0_config1" },
194 { 16, 2, "c0_config2" },
195 { 16, 3, "c0_config3" },
196 { 18, 1, "c0_watchlo,1" },
197 { 18, 2, "c0_watchlo,2" },
198 { 18, 3, "c0_watchlo,3" },
199 { 18, 4, "c0_watchlo,4" },
200 { 18, 5, "c0_watchlo,5" },
201 { 18, 6, "c0_watchlo,6" },
202 { 18, 7, "c0_watchlo,7" },
203 { 19, 1, "c0_watchhi,1" },
204 { 19, 2, "c0_watchhi,2" },
205 { 19, 3, "c0_watchhi,3" },
206 { 19, 4, "c0_watchhi,4" },
207 { 19, 5, "c0_watchhi,5" },
208 { 19, 6, "c0_watchhi,6" },
209 { 19, 7, "c0_watchhi,7" },
210 { 23, 1, "c0_tracecontrol" },
211 { 23, 2, "c0_tracecontrol2" },
212 { 23, 3, "c0_usertracedata" },
213 { 23, 4, "c0_tracebpc" },
214 { 25, 1, "c0_perfcnt,1" },
215 { 25, 2, "c0_perfcnt,2" },
216 { 25, 3, "c0_perfcnt,3" },
217 { 25, 4, "c0_perfcnt,4" },
218 { 25, 5, "c0_perfcnt,5" },
219 { 25, 6, "c0_perfcnt,6" },
220 { 25, 7, "c0_perfcnt,7" },
221 { 27, 1, "c0_cacheerr,1" },
222 { 27, 2, "c0_cacheerr,2" },
223 { 27, 3, "c0_cacheerr,3" },
224 { 28, 1, "c0_datalo" },
225 { 28, 2, "c0_taglo1" },
226 { 28, 3, "c0_datalo1" },
227 { 28, 4, "c0_taglo2" },
228 { 28, 5, "c0_datalo2" },
229 { 28, 6, "c0_taglo3" },
230 { 28, 7, "c0_datalo3" },
231 { 29, 1, "c0_datahi" },
232 { 29, 2, "c0_taghi1" },
233 { 29, 3, "c0_datahi1" },
234 { 29, 4, "c0_taghi2" },
235 { 29, 5, "c0_datahi2" },
236 { 29, 6, "c0_taghi3" },
237 { 29, 7, "c0_datahi3" },
238 };
239
240 /* SB-1: MIPS64 (mips_cp0_names_mips3264) with minor mods. */
241 static const char * const mips_cp0_names_sb1[32] = {
242 "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
243 "c0_context", "c0_pagemask", "c0_wired", "$7",
244 "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
245 "c0_status", "c0_cause", "c0_epc", "c0_prid",
246 "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
247 "c0_xcontext", "$21", "$22", "c0_debug",
248 "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr_i",
249 "c0_taglo_i", "c0_taghi_i", "c0_errorepc", "c0_desave",
250 };
251
252 static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] = {
253 { 16, 1, "c0_config1" },
254 { 18, 1, "c0_watchlo,1" },
255 { 19, 1, "c0_watchhi,1" },
256 { 22, 0, "c0_perftrace" },
257 { 23, 3, "c0_edebug" },
258 { 25, 1, "c0_perfcnt,1" },
259 { 25, 2, "c0_perfcnt,2" },
260 { 25, 3, "c0_perfcnt,3" },
261 { 25, 4, "c0_perfcnt,4" },
262 { 25, 5, "c0_perfcnt,5" },
263 { 25, 6, "c0_perfcnt,6" },
264 { 25, 7, "c0_perfcnt,7" },
265 { 26, 1, "c0_buserr_pa" },
266 { 27, 1, "c0_cacheerr_d" },
267 { 27, 3, "c0_cacheerr_d_pa" },
268 { 28, 1, "c0_datalo_i" },
269 { 28, 2, "c0_taglo_d" },
270 { 28, 3, "c0_datalo_d" },
271 { 29, 1, "c0_datahi_i" },
272 { 29, 2, "c0_taghi_d" },
273 { 29, 3, "c0_datahi_d" },
274 };
275
276 static const char * const mips_hwr_names_numeric[32] = {
277 "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
278 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
279 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
280 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
281 };
282
283 static const char * const mips_hwr_names_mips3264r2[32] = {
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 const char *name;
293 const char * const *gpr_names;
294 const char * const *fpr_names;
295 };
296
297 struct mips_abi_choice mips_abi_choices[] = {
298 { "numeric", mips_gpr_names_numeric, mips_fpr_names_numeric },
299 { "32", mips_gpr_names_oldabi, mips_fpr_names_32 },
300 { "n32", mips_gpr_names_newabi, mips_fpr_names_n32 },
301 { "64", mips_gpr_names_newabi, mips_fpr_names_64 },
302 };
303
304 struct mips_arch_choice {
305 const char *name;
306 int bfd_mach_valid;
307 unsigned long bfd_mach;
308 int processor;
309 int isa;
310 const char * const *cp0_names;
311 const struct mips_cp0sel_name *cp0sel_names;
312 unsigned int cp0sel_names_len;
313 const char * const *hwr_names;
314 };
315
316 const struct mips_arch_choice mips_arch_choices[] = {
317 { "numeric", 0, 0, 0, 0,
318 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
319
320 { "r3000", 1, bfd_mach_mips3000, CPU_R3000, ISA_MIPS1,
321 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
322 { "r3900", 1, bfd_mach_mips3900, CPU_R3900, ISA_MIPS1,
323 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
324 { "r4000", 1, bfd_mach_mips4000, CPU_R4000, ISA_MIPS3,
325 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
326 { "r4010", 1, bfd_mach_mips4010, CPU_R4010, ISA_MIPS2,
327 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
328 { "vr4100", 1, bfd_mach_mips4100, CPU_VR4100, ISA_MIPS3,
329 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
330 { "vr4111", 1, bfd_mach_mips4111, CPU_R4111, ISA_MIPS3,
331 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
332 { "vr4120", 1, bfd_mach_mips4120, CPU_VR4120, ISA_MIPS3,
333 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
334 { "r4300", 1, bfd_mach_mips4300, CPU_R4300, ISA_MIPS3,
335 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
336 { "r4400", 1, bfd_mach_mips4400, CPU_R4400, ISA_MIPS3,
337 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
338 { "r4600", 1, bfd_mach_mips4600, CPU_R4600, ISA_MIPS3,
339 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
340 { "r4650", 1, bfd_mach_mips4650, CPU_R4650, ISA_MIPS3,
341 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
342 { "r5000", 1, bfd_mach_mips5000, CPU_R5000, ISA_MIPS4,
343 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
344 { "vr5400", 1, bfd_mach_mips5400, CPU_VR5400, ISA_MIPS4,
345 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
346 { "vr5500", 1, bfd_mach_mips5500, CPU_VR5500, ISA_MIPS4,
347 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
348 { "r6000", 1, bfd_mach_mips6000, CPU_R6000, ISA_MIPS2,
349 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
350 { "rm7000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
351 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
352 { "rm9000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
353 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
354 { "r8000", 1, bfd_mach_mips8000, CPU_R8000, ISA_MIPS4,
355 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
356 { "r10000", 1, bfd_mach_mips10000, CPU_R10000, ISA_MIPS4,
357 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
358 { "r12000", 1, bfd_mach_mips12000, CPU_R12000, ISA_MIPS4,
359 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
360 { "mips5", 1, bfd_mach_mips5, CPU_MIPS5, ISA_MIPS5,
361 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
362
363 /* For stock MIPS32, disassemble all applicable MIPS-specified ASEs.
364 Note that MIPS-3D and MDMX are not applicable to MIPS32. (See
365 _MIPS32 Architecture For Programmers Volume I: Introduction to the
366 MIPS32 Architecture_ (MIPS Document Number MD00082, Revision 0.95),
367 page 1. */
368 { "mips32", 1, bfd_mach_mipsisa32, CPU_MIPS32,
369 ISA_MIPS32 | INSN_MIPS16,
370 mips_cp0_names_mips3264,
371 mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
372 mips_hwr_names_numeric },
373
374 { "mips32r2", 1, bfd_mach_mipsisa32r2, CPU_MIPS32R2,
375 ISA_MIPS32R2 | INSN_MIPS16,
376 mips_cp0_names_mips3264r2,
377 mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
378 mips_hwr_names_mips3264r2 },
379
380 /* For stock MIPS64, disassemble all applicable MIPS-specified ASEs. */
381 { "mips64", 1, bfd_mach_mipsisa64, CPU_MIPS64,
382 ISA_MIPS64 | INSN_MIPS16 | INSN_MIPS3D | INSN_MDMX,
383 mips_cp0_names_mips3264,
384 mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
385 mips_hwr_names_numeric },
386
387 { "mips64r2", 1, bfd_mach_mipsisa64r2, CPU_MIPS64R2,
388 ISA_MIPS64R2 | INSN_MIPS16 | INSN_MIPS3D | INSN_MDMX,
389 mips_cp0_names_mips3264r2,
390 mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
391 mips_hwr_names_mips3264r2 },
392
393 { "sb1", 1, bfd_mach_mips_sb1, CPU_SB1,
394 ISA_MIPS64 | INSN_MIPS3D | INSN_SB1,
395 mips_cp0_names_sb1,
396 mips_cp0sel_names_sb1, ARRAY_SIZE (mips_cp0sel_names_sb1),
397 mips_hwr_names_numeric },
398
399 /* This entry, mips16, is here only for ISA/processor selection; do
400 not print its name. */
401 { "", 1, bfd_mach_mips16, CPU_MIPS16, ISA_MIPS3 | INSN_MIPS16,
402 mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
403 };
404
405 /* ISA and processor type to disassemble for, and register names to use.
406 set_default_mips_dis_options and parse_mips_dis_options fill in these
407 values. */
408 static int mips_processor;
409 static int mips_isa;
410 static const char * const *mips_gpr_names;
411 static const char * const *mips_fpr_names;
412 static const char * const *mips_cp0_names;
413 static const struct mips_cp0sel_name *mips_cp0sel_names;
414 static int mips_cp0sel_names_len;
415 static const char * const *mips_hwr_names;
416
417 /* Other options */
418 static int no_aliases; /* If set disassemble as most general inst. */
419
420 static const struct mips_abi_choice *choose_abi_by_name
421 PARAMS ((const char *, unsigned int));
422 static const struct mips_arch_choice *choose_arch_by_name
423 PARAMS ((const char *, unsigned int));
424 static const struct mips_arch_choice *choose_arch_by_number
425 PARAMS ((unsigned long));
426 static const struct mips_cp0sel_name *lookup_mips_cp0sel_name
427 PARAMS ((const struct mips_cp0sel_name *, unsigned int, unsigned int,
428 unsigned int));
429 \f
430 static const struct mips_abi_choice *
431 choose_abi_by_name (name, namelen)
432 const char *name;
433 unsigned int namelen;
434 {
435 const struct mips_abi_choice *c;
436 unsigned int i;
437
438 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_abi_choices) && c == NULL; i++)
439 {
440 if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
441 && strlen (mips_abi_choices[i].name) == namelen)
442 c = &mips_abi_choices[i];
443 }
444 return c;
445 }
446
447 static const struct mips_arch_choice *
448 choose_arch_by_name (name, namelen)
449 const char *name;
450 unsigned int namelen;
451 {
452 const struct mips_arch_choice *c = NULL;
453 unsigned int i;
454
455 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
456 {
457 if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
458 && strlen (mips_arch_choices[i].name) == namelen)
459 c = &mips_arch_choices[i];
460 }
461 return c;
462 }
463
464 static const struct mips_arch_choice *
465 choose_arch_by_number (mach)
466 unsigned long mach;
467 {
468 static unsigned long hint_bfd_mach;
469 static const struct mips_arch_choice *hint_arch_choice;
470 const struct mips_arch_choice *c;
471 unsigned int i;
472
473 /* We optimize this because even if the user specifies no
474 flags, this will be done for every instruction! */
475 if (hint_bfd_mach == mach
476 && hint_arch_choice != NULL
477 && hint_arch_choice->bfd_mach == hint_bfd_mach)
478 return hint_arch_choice;
479
480 for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
481 {
482 if (mips_arch_choices[i].bfd_mach_valid
483 && mips_arch_choices[i].bfd_mach == mach)
484 {
485 c = &mips_arch_choices[i];
486 hint_bfd_mach = mach;
487 hint_arch_choice = c;
488 }
489 }
490 return c;
491 }
492
493 void
494 set_default_mips_dis_options (info)
495 struct disassemble_info *info;
496 {
497 const struct mips_arch_choice *chosen_arch;
498
499 /* Defaults: mipsIII/r3000 (?!), (o)32-style ("oldabi") GPR names,
500 and numeric FPR, CP0 register, and HWR names. */
501 mips_isa = ISA_MIPS3;
502 mips_processor = CPU_R3000;
503 mips_gpr_names = mips_gpr_names_oldabi;
504 mips_fpr_names = mips_fpr_names_numeric;
505 mips_cp0_names = mips_cp0_names_numeric;
506 mips_cp0sel_names = NULL;
507 mips_cp0sel_names_len = 0;
508 mips_hwr_names = mips_hwr_names_numeric;
509 no_aliases = 0;
510
511 /* If an ELF "newabi" binary, use the n32/(n)64 GPR names. */
512 if (info->flavour == bfd_target_elf_flavour && info->section != NULL)
513 {
514 Elf_Internal_Ehdr *header;
515
516 header = elf_elfheader (info->section->owner);
517 if (is_newabi (header))
518 mips_gpr_names = mips_gpr_names_newabi;
519 }
520
521 /* Set ISA, architecture, and cp0 register names as best we can. */
522 #if ! SYMTAB_AVAILABLE
523 /* This is running out on a target machine, not in a host tool.
524 FIXME: Where does mips_target_info come from? */
525 target_processor = mips_target_info.processor;
526 mips_isa = mips_target_info.isa;
527 #else
528 chosen_arch = choose_arch_by_number (info->mach);
529 if (chosen_arch != NULL)
530 {
531 mips_processor = chosen_arch->processor;
532 mips_isa = chosen_arch->isa;
533 mips_cp0_names = chosen_arch->cp0_names;
534 mips_cp0sel_names = chosen_arch->cp0sel_names;
535 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
536 mips_hwr_names = chosen_arch->hwr_names;
537 }
538 #endif
539 }
540
541 void
542 parse_mips_dis_option (option, len)
543 const char *option;
544 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 {
561 if (option[i] == '=')
562 break;
563 }
564 if (i == 0) /* Invalid option: no name before '='. */
565 return;
566 if (i == len) /* Invalid option: no '='. */
567 return;
568 if (i == (len - 1)) /* Invalid option: no value after '='. */
569 return;
570
571 optionlen = i;
572 val = option + (optionlen + 1);
573 vallen = len - (optionlen + 1);
574
575 if (strncmp("gpr-names", option, optionlen) == 0
576 && strlen("gpr-names") == optionlen)
577 {
578 chosen_abi = choose_abi_by_name (val, vallen);
579 if (chosen_abi != NULL)
580 mips_gpr_names = chosen_abi->gpr_names;
581 return;
582 }
583
584 if (strncmp("fpr-names", option, optionlen) == 0
585 && strlen("fpr-names") == optionlen)
586 {
587 chosen_abi = choose_abi_by_name (val, vallen);
588 if (chosen_abi != NULL)
589 mips_fpr_names = chosen_abi->fpr_names;
590 return;
591 }
592
593 if (strncmp("cp0-names", option, optionlen) == 0
594 && strlen("cp0-names") == optionlen)
595 {
596 chosen_arch = choose_arch_by_name (val, vallen);
597 if (chosen_arch != NULL)
598 {
599 mips_cp0_names = chosen_arch->cp0_names;
600 mips_cp0sel_names = chosen_arch->cp0sel_names;
601 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
602 }
603 return;
604 }
605
606 if (strncmp("hwr-names", option, optionlen) == 0
607 && strlen("hwr-names") == optionlen)
608 {
609 chosen_arch = choose_arch_by_name (val, vallen);
610 if (chosen_arch != NULL)
611 mips_hwr_names = chosen_arch->hwr_names;
612 return;
613 }
614
615 if (strncmp("reg-names", option, optionlen) == 0
616 && strlen("reg-names") == optionlen)
617 {
618 /* We check both ABI and ARCH here unconditionally, so
619 that "numeric" will do the desirable thing: select
620 numeric register names for all registers. Other than
621 that, a given name probably won't match both. */
622 chosen_abi = choose_abi_by_name (val, vallen);
623 if (chosen_abi != NULL)
624 {
625 mips_gpr_names = chosen_abi->gpr_names;
626 mips_fpr_names = chosen_abi->fpr_names;
627 }
628 chosen_arch = choose_arch_by_name (val, vallen);
629 if (chosen_arch != NULL)
630 {
631 mips_cp0_names = chosen_arch->cp0_names;
632 mips_cp0sel_names = chosen_arch->cp0sel_names;
633 mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
634 mips_hwr_names = chosen_arch->hwr_names;
635 }
636 return;
637 }
638
639 /* Invalid option. */
640 }
641
642 void
643 parse_mips_dis_options (options)
644 const char *options;
645 {
646 const char *option_end;
647
648 if (options == NULL)
649 return;
650
651 while (*options != '\0')
652 {
653 /* Skip empty options. */
654 if (*options == ',')
655 {
656 options++;
657 continue;
658 }
659
660 /* We know that *options is neither NUL or a comma. */
661 option_end = options + 1;
662 while (*option_end != ',' && *option_end != '\0')
663 option_end++;
664
665 parse_mips_dis_option (options, option_end - options);
666
667 /* Go on to the next one. If option_end points to a comma, it
668 will be skipped above. */
669 options = option_end;
670 }
671 }
672
673 static const struct mips_cp0sel_name *
674 lookup_mips_cp0sel_name(names, len, cp0reg, sel)
675 const struct mips_cp0sel_name *names;
676 unsigned int len, cp0reg, sel;
677 {
678 unsigned int i;
679
680 for (i = 0; i < len; i++)
681 if (names[i].cp0reg == cp0reg && names[i].sel == sel)
682 return &names[i];
683 return NULL;
684 }
685 \f
686 /* Print insn arguments for 32/64-bit code. */
687
688 static void
689 print_insn_args (d, l, pc, info)
690 const char *d;
691 register unsigned long int l;
692 bfd_vma pc;
693 struct disassemble_info *info;
694 {
695 int op, delta;
696 unsigned int lsb, msb, msbd;
697
698 lsb = 0;
699
700 for (; *d != '\0'; d++)
701 {
702 switch (*d)
703 {
704 case ',':
705 case '(':
706 case ')':
707 case '[':
708 case ']':
709 (*info->fprintf_func) (info->stream, "%c", *d);
710 break;
711
712 case '+':
713 /* Extension character; switch for second char. */
714 d++;
715 switch (*d)
716 {
717 case '\0':
718 /* xgettext:c-format */
719 (*info->fprintf_func) (info->stream,
720 _("# internal error, incomplete extension sequence (+)"));
721 return;
722
723 case 'A':
724 lsb = (l >> OP_SH_SHAMT) & OP_MASK_SHAMT;
725 (*info->fprintf_func) (info->stream, "0x%x", lsb);
726 break;
727
728 case 'B':
729 msb = (l >> OP_SH_INSMSB) & OP_MASK_INSMSB;
730 (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
731 break;
732
733 case 'C':
734 case 'H':
735 msbd = (l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD;
736 (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
737 break;
738
739 case 'D':
740 {
741 const struct mips_cp0sel_name *n;
742 unsigned int cp0reg, sel;
743
744 cp0reg = (l >> OP_SH_RD) & OP_MASK_RD;
745 sel = (l >> OP_SH_SEL) & OP_MASK_SEL;
746
747 /* CP0 register including 'sel' code for mtcN (et al.), to be
748 printed textually if known. If not known, print both
749 CP0 register name and sel numerically since CP0 register
750 with sel 0 may have a name unrelated to register being
751 printed. */
752 n = lookup_mips_cp0sel_name(mips_cp0sel_names,
753 mips_cp0sel_names_len, cp0reg, sel);
754 if (n != NULL)
755 (*info->fprintf_func) (info->stream, "%s", n->name);
756 else
757 (*info->fprintf_func) (info->stream, "$%d,%d", cp0reg, sel);
758 break;
759 }
760
761 case 'E':
762 lsb = ((l >> OP_SH_SHAMT) & OP_MASK_SHAMT) + 32;
763 (*info->fprintf_func) (info->stream, "0x%x", lsb);
764 break;
765
766 case 'F':
767 msb = ((l >> OP_SH_INSMSB) & OP_MASK_INSMSB) + 32;
768 (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
769 break;
770
771 case 'G':
772 msbd = ((l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD) + 32;
773 (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
774 break;
775
776 default:
777 /* xgettext:c-format */
778 (*info->fprintf_func) (info->stream,
779 _("# internal error, undefined extension sequence (+%c)"),
780 *d);
781 return;
782 }
783 break;
784
785 case 's':
786 case 'b':
787 case 'r':
788 case 'v':
789 (*info->fprintf_func) (info->stream, "%s",
790 mips_gpr_names[(l >> OP_SH_RS) & OP_MASK_RS]);
791 break;
792
793 case 't':
794 case 'w':
795 (*info->fprintf_func) (info->stream, "%s",
796 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
797 break;
798
799 case 'i':
800 case 'u':
801 (*info->fprintf_func) (info->stream, "0x%x",
802 (l >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE);
803 break;
804
805 case 'j': /* Same as i, but sign-extended. */
806 case 'o':
807 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
808 if (delta & 0x8000)
809 delta |= ~0xffff;
810 (*info->fprintf_func) (info->stream, "%d",
811 delta);
812 break;
813
814 case 'h':
815 (*info->fprintf_func) (info->stream, "0x%x",
816 (unsigned int) ((l >> OP_SH_PREFX)
817 & OP_MASK_PREFX));
818 break;
819
820 case 'k':
821 (*info->fprintf_func) (info->stream, "0x%x",
822 (unsigned int) ((l >> OP_SH_CACHE)
823 & OP_MASK_CACHE));
824 break;
825
826 case 'a':
827 info->target = (((pc + 4) & ~(bfd_vma) 0x0fffffff)
828 | (((l >> OP_SH_TARGET) & OP_MASK_TARGET) << 2));
829 (*info->print_address_func) (info->target, info);
830 break;
831
832 case 'p':
833 /* Sign extend the displacement. */
834 delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
835 if (delta & 0x8000)
836 delta |= ~0xffff;
837 info->target = (delta << 2) + pc + INSNLEN;
838 (*info->print_address_func) (info->target, info);
839 break;
840
841 case 'd':
842 (*info->fprintf_func) (info->stream, "%s",
843 mips_gpr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
844 break;
845
846 case 'U':
847 {
848 /* First check for both rd and rt being equal. */
849 unsigned int reg = (l >> OP_SH_RD) & OP_MASK_RD;
850 if (reg == ((l >> OP_SH_RT) & OP_MASK_RT))
851 (*info->fprintf_func) (info->stream, "%s",
852 mips_gpr_names[reg]);
853 else
854 {
855 /* If one is zero use the other. */
856 if (reg == 0)
857 (*info->fprintf_func) (info->stream, "%s",
858 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
859 else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0)
860 (*info->fprintf_func) (info->stream, "%s",
861 mips_gpr_names[reg]);
862 else /* Bogus, result depends on processor. */
863 (*info->fprintf_func) (info->stream, "%s or %s",
864 mips_gpr_names[reg],
865 mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
866 }
867 }
868 break;
869
870 case 'z':
871 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
872 break;
873
874 case '<':
875 (*info->fprintf_func) (info->stream, "0x%x",
876 (l >> OP_SH_SHAMT) & OP_MASK_SHAMT);
877 break;
878
879 case 'c':
880 (*info->fprintf_func) (info->stream, "0x%x",
881 (l >> OP_SH_CODE) & OP_MASK_CODE);
882 break;
883
884 case 'q':
885 (*info->fprintf_func) (info->stream, "0x%x",
886 (l >> OP_SH_CODE2) & OP_MASK_CODE2);
887 break;
888
889 case 'C':
890 (*info->fprintf_func) (info->stream, "0x%x",
891 (l >> OP_SH_COPZ) & OP_MASK_COPZ);
892 break;
893
894 case 'B':
895 (*info->fprintf_func) (info->stream, "0x%x",
896 (l >> OP_SH_CODE20) & OP_MASK_CODE20);
897 break;
898
899 case 'J':
900 (*info->fprintf_func) (info->stream, "0x%x",
901 (l >> OP_SH_CODE19) & OP_MASK_CODE19);
902 break;
903
904 case 'S':
905 case 'V':
906 (*info->fprintf_func) (info->stream, "%s",
907 mips_fpr_names[(l >> OP_SH_FS) & OP_MASK_FS]);
908 break;
909
910 case 'T':
911 case 'W':
912 (*info->fprintf_func) (info->stream, "%s",
913 mips_fpr_names[(l >> OP_SH_FT) & OP_MASK_FT]);
914 break;
915
916 case 'D':
917 (*info->fprintf_func) (info->stream, "%s",
918 mips_fpr_names[(l >> OP_SH_FD) & OP_MASK_FD]);
919 break;
920
921 case 'R':
922 (*info->fprintf_func) (info->stream, "%s",
923 mips_fpr_names[(l >> OP_SH_FR) & OP_MASK_FR]);
924 break;
925
926 case 'E':
927 /* Coprocessor register for lwcN instructions, et al.
928
929 Note that there is no load/store cp0 instructions, and
930 that FPU (cp1) instructions disassemble this field using
931 'T' format. Therefore, until we gain understanding of
932 cp2 register names, we can simply print the register
933 numbers. */
934 (*info->fprintf_func) (info->stream, "$%d",
935 (l >> OP_SH_RT) & OP_MASK_RT);
936 break;
937
938 case 'G':
939 /* Coprocessor register for mtcN instructions, et al. Note
940 that FPU (cp1) instructions disassemble this field using
941 'S' format. Therefore, we only need to worry about cp0,
942 cp2, and cp3. */
943 op = (l >> OP_SH_OP) & OP_MASK_OP;
944 if (op == OP_OP_COP0)
945 (*info->fprintf_func) (info->stream, "%s",
946 mips_cp0_names[(l >> OP_SH_RD) & OP_MASK_RD]);
947 else
948 (*info->fprintf_func) (info->stream, "$%d",
949 (l >> OP_SH_RD) & OP_MASK_RD);
950 break;
951
952 case 'K':
953 (*info->fprintf_func) (info->stream, "%s",
954 mips_hwr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
955 break;
956
957 case 'N':
958 (*info->fprintf_func) (info->stream, "$fcc%d",
959 (l >> OP_SH_BCC) & OP_MASK_BCC);
960 break;
961
962 case 'M':
963 (*info->fprintf_func) (info->stream, "$fcc%d",
964 (l >> OP_SH_CCC) & OP_MASK_CCC);
965 break;
966
967 case 'P':
968 (*info->fprintf_func) (info->stream, "%d",
969 (l >> OP_SH_PERFREG) & OP_MASK_PERFREG);
970 break;
971
972 case 'e':
973 (*info->fprintf_func) (info->stream, "%d",
974 (l >> OP_SH_VECBYTE) & OP_MASK_VECBYTE);
975 break;
976
977 case '%':
978 (*info->fprintf_func) (info->stream, "%d",
979 (l >> OP_SH_VECALIGN) & OP_MASK_VECALIGN);
980 break;
981
982 case 'H':
983 (*info->fprintf_func) (info->stream, "%d",
984 (l >> OP_SH_SEL) & OP_MASK_SEL);
985 break;
986
987 case 'O':
988 (*info->fprintf_func) (info->stream, "%d",
989 (l >> OP_SH_ALN) & OP_MASK_ALN);
990 break;
991
992 case 'Q':
993 {
994 unsigned int vsel = (l >> OP_SH_VSEL) & OP_MASK_VSEL;
995 if ((vsel & 0x10) == 0)
996 {
997 int fmt;
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 \f
1044 /* Check if the object uses NewABI conventions. */
1045
1046 static int
1047 is_newabi (header)
1048 Elf_Internal_Ehdr *header;
1049 {
1050 /* There are no old-style ABIs which use 64-bit ELF. */
1051 if (header->e_ident[EI_CLASS] == ELFCLASS64)
1052 return 1;
1053
1054 /* If a 32-bit ELF file, n32 is a new-style ABI. */
1055 if ((header->e_flags & EF_MIPS_ABI2) != 0)
1056 return 1;
1057
1058 return 0;
1059 }
1060 \f
1061 /* Print the mips instruction at address MEMADDR in debugged memory,
1062 on using INFO. Returns length of the instruction, in bytes, which is
1063 always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if
1064 this is little-endian code. */
1065
1066 static int
1067 print_insn_mips (memaddr, word, info)
1068 bfd_vma memaddr;
1069 unsigned long int word;
1070 struct disassemble_info *info;
1071 {
1072 register const struct mips_opcode *op;
1073 static bfd_boolean init = 0;
1074 static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
1075
1076 /* Build a hash table to shorten the search time. */
1077 if (! init)
1078 {
1079 unsigned int i;
1080
1081 for (i = 0; i <= OP_MASK_OP; i++)
1082 {
1083 for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++)
1084 {
1085 if (op->pinfo == INSN_MACRO
1086 || (no_aliases && (op->pinfo2 & INSN2_ALIAS)))
1087 continue;
1088 if (i == ((op->match >> OP_SH_OP) & OP_MASK_OP))
1089 {
1090 mips_hash[i] = op;
1091 break;
1092 }
1093 }
1094 }
1095
1096 init = 1;
1097 }
1098
1099 info->bytes_per_chunk = INSNLEN;
1100 info->display_endian = info->endian;
1101 info->insn_info_valid = 1;
1102 info->branch_delay_insns = 0;
1103 info->data_size = 0;
1104 info->insn_type = dis_nonbranch;
1105 info->target = 0;
1106 info->target2 = 0;
1107
1108 op = mips_hash[(word >> OP_SH_OP) & OP_MASK_OP];
1109 if (op != NULL)
1110 {
1111 for (; op < &mips_opcodes[NUMOPCODES]; op++)
1112 {
1113 if (op->pinfo != INSN_MACRO
1114 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1115 && (word & op->mask) == op->match)
1116 {
1117 register const char *d;
1118
1119 /* We always allow to disassemble the jalx instruction. */
1120 if (! OPCODE_IS_MEMBER (op, mips_isa, mips_processor)
1121 && strcmp (op->name, "jalx"))
1122 continue;
1123
1124 /* Figure out instruction type and branch delay information. */
1125 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1126 {
1127 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1128 info->insn_type = dis_jsr;
1129 else
1130 info->insn_type = dis_branch;
1131 info->branch_delay_insns = 1;
1132 }
1133 else if ((op->pinfo & (INSN_COND_BRANCH_DELAY
1134 | INSN_COND_BRANCH_LIKELY)) != 0)
1135 {
1136 if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1137 info->insn_type = dis_condjsr;
1138 else
1139 info->insn_type = dis_condbranch;
1140 info->branch_delay_insns = 1;
1141 }
1142 else if ((op->pinfo & (INSN_STORE_MEMORY
1143 | INSN_LOAD_MEMORY_DELAY)) != 0)
1144 info->insn_type = dis_dref;
1145
1146 (*info->fprintf_func) (info->stream, "%s", op->name);
1147
1148 d = op->args;
1149 if (d != NULL && *d != '\0')
1150 {
1151 (*info->fprintf_func) (info->stream, "\t");
1152 print_insn_args (d, word, memaddr, info);
1153 }
1154
1155 return INSNLEN;
1156 }
1157 }
1158 }
1159
1160 /* Handle undefined instructions. */
1161 info->insn_type = dis_noninsn;
1162 (*info->fprintf_func) (info->stream, "0x%x", word);
1163 return INSNLEN;
1164 }
1165 \f
1166 /* In an environment where we do not know the symbol type of the
1167 instruction we are forced to assume that the low order bit of the
1168 instructions' address may mark it as a mips16 instruction. If we
1169 are single stepping, or the pc is within the disassembled function,
1170 this works. Otherwise, we need a clue. Sometimes. */
1171
1172 static int
1173 _print_insn_mips (memaddr, info, endianness)
1174 bfd_vma memaddr;
1175 struct disassemble_info *info;
1176 enum bfd_endian endianness;
1177 {
1178 bfd_byte buffer[INSNLEN];
1179 int status;
1180
1181 set_default_mips_dis_options (info);
1182 parse_mips_dis_options (info->disassembler_options);
1183
1184 #if 1
1185 /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
1186 /* Only a few tools will work this way. */
1187 if (memaddr & 0x01)
1188 return print_insn_mips16 (memaddr, info);
1189 #endif
1190
1191 #if SYMTAB_AVAILABLE
1192 if (info->mach == bfd_mach_mips16
1193 || (info->flavour == bfd_target_elf_flavour
1194 && info->symbols != NULL
1195 && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
1196 == STO_MIPS16)))
1197 return print_insn_mips16 (memaddr, info);
1198 #endif
1199
1200 status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
1201 if (status == 0)
1202 {
1203 unsigned long insn;
1204
1205 if (endianness == BFD_ENDIAN_BIG)
1206 insn = (unsigned long) bfd_getb32 (buffer);
1207 else
1208 insn = (unsigned long) bfd_getl32 (buffer);
1209
1210 return print_insn_mips (memaddr, insn, info);
1211 }
1212 else
1213 {
1214 (*info->memory_error_func) (status, memaddr, info);
1215 return -1;
1216 }
1217 }
1218
1219 int
1220 print_insn_big_mips (memaddr, info)
1221 bfd_vma memaddr;
1222 struct disassemble_info *info;
1223 {
1224 return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
1225 }
1226
1227 int
1228 print_insn_little_mips (memaddr, info)
1229 bfd_vma memaddr;
1230 struct disassemble_info *info;
1231 {
1232 return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
1233 }
1234 \f
1235 /* Disassemble mips16 instructions. */
1236
1237 static int
1238 print_insn_mips16 (memaddr, info)
1239 bfd_vma memaddr;
1240 struct disassemble_info *info;
1241 {
1242 int status;
1243 bfd_byte buffer[2];
1244 int length;
1245 int insn;
1246 bfd_boolean use_extend;
1247 int extend = 0;
1248 const struct mips_opcode *op, *opend;
1249
1250 info->bytes_per_chunk = 2;
1251 info->display_endian = info->endian;
1252 info->insn_info_valid = 1;
1253 info->branch_delay_insns = 0;
1254 info->data_size = 0;
1255 info->insn_type = dis_nonbranch;
1256 info->target = 0;
1257 info->target2 = 0;
1258
1259 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1260 if (status != 0)
1261 {
1262 (*info->memory_error_func) (status, memaddr, info);
1263 return -1;
1264 }
1265
1266 length = 2;
1267
1268 if (info->endian == BFD_ENDIAN_BIG)
1269 insn = bfd_getb16 (buffer);
1270 else
1271 insn = bfd_getl16 (buffer);
1272
1273 /* Handle the extend opcode specially. */
1274 use_extend = FALSE;
1275 if ((insn & 0xf800) == 0xf000)
1276 {
1277 use_extend = TRUE;
1278 extend = insn & 0x7ff;
1279
1280 memaddr += 2;
1281
1282 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1283 if (status != 0)
1284 {
1285 (*info->fprintf_func) (info->stream, "extend 0x%x",
1286 (unsigned int) extend);
1287 (*info->memory_error_func) (status, memaddr, info);
1288 return -1;
1289 }
1290
1291 if (info->endian == BFD_ENDIAN_BIG)
1292 insn = bfd_getb16 (buffer);
1293 else
1294 insn = bfd_getl16 (buffer);
1295
1296 /* Check for an extend opcode followed by an extend opcode. */
1297 if ((insn & 0xf800) == 0xf000)
1298 {
1299 (*info->fprintf_func) (info->stream, "extend 0x%x",
1300 (unsigned int) extend);
1301 info->insn_type = dis_noninsn;
1302 return length;
1303 }
1304
1305 length += 2;
1306 }
1307
1308 /* FIXME: Should probably use a hash table on the major opcode here. */
1309
1310 opend = mips16_opcodes + bfd_mips16_num_opcodes;
1311 for (op = mips16_opcodes; op < opend; op++)
1312 {
1313 if (op->pinfo != INSN_MACRO
1314 && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1315 && (insn & op->mask) == op->match)
1316 {
1317 const char *s;
1318
1319 if (strchr (op->args, 'a') != NULL)
1320 {
1321 if (use_extend)
1322 {
1323 (*info->fprintf_func) (info->stream, "extend 0x%x",
1324 (unsigned int) extend);
1325 info->insn_type = dis_noninsn;
1326 return length - 2;
1327 }
1328
1329 use_extend = FALSE;
1330
1331 memaddr += 2;
1332
1333 status = (*info->read_memory_func) (memaddr, buffer, 2,
1334 info);
1335 if (status == 0)
1336 {
1337 use_extend = TRUE;
1338 if (info->endian == BFD_ENDIAN_BIG)
1339 extend = bfd_getb16 (buffer);
1340 else
1341 extend = bfd_getl16 (buffer);
1342 length += 2;
1343 }
1344 }
1345
1346 (*info->fprintf_func) (info->stream, "%s", op->name);
1347 if (op->args[0] != '\0')
1348 (*info->fprintf_func) (info->stream, "\t");
1349
1350 for (s = op->args; *s != '\0'; s++)
1351 {
1352 if (*s == ','
1353 && s[1] == 'w'
1354 && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
1355 == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
1356 {
1357 /* Skip the register and the comma. */
1358 ++s;
1359 continue;
1360 }
1361 if (*s == ','
1362 && s[1] == 'v'
1363 && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
1364 == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
1365 {
1366 /* Skip the register and the comma. */
1367 ++s;
1368 continue;
1369 }
1370 print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
1371 info);
1372 }
1373
1374 if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1375 {
1376 info->branch_delay_insns = 1;
1377 if (info->insn_type != dis_jsr)
1378 info->insn_type = dis_branch;
1379 }
1380
1381 return length;
1382 }
1383 }
1384
1385 if (use_extend)
1386 (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
1387 (*info->fprintf_func) (info->stream, "0x%x", insn);
1388 info->insn_type = dis_noninsn;
1389
1390 return length;
1391 }
1392
1393 /* Disassemble an operand for a mips16 instruction. */
1394
1395 static void
1396 print_mips16_insn_arg (type, op, l, use_extend, extend, memaddr, info)
1397 char type;
1398 const struct mips_opcode *op;
1399 int l;
1400 bfd_boolean use_extend;
1401 int extend;
1402 bfd_vma memaddr;
1403 struct disassemble_info *info;
1404 {
1405 switch (type)
1406 {
1407 case ',':
1408 case '(':
1409 case ')':
1410 (*info->fprintf_func) (info->stream, "%c", type);
1411 break;
1412
1413 case 'y':
1414 case 'w':
1415 (*info->fprintf_func) (info->stream, "%s",
1416 mips16_reg_names[((l >> MIPS16OP_SH_RY)
1417 & MIPS16OP_MASK_RY)]);
1418 break;
1419
1420 case 'x':
1421 case 'v':
1422 (*info->fprintf_func) (info->stream, "%s",
1423 mips16_reg_names[((l >> MIPS16OP_SH_RX)
1424 & MIPS16OP_MASK_RX)]);
1425 break;
1426
1427 case 'z':
1428 (*info->fprintf_func) (info->stream, "%s",
1429 mips16_reg_names[((l >> MIPS16OP_SH_RZ)
1430 & MIPS16OP_MASK_RZ)]);
1431 break;
1432
1433 case 'Z':
1434 (*info->fprintf_func) (info->stream, "%s",
1435 mips16_reg_names[((l >> MIPS16OP_SH_MOVE32Z)
1436 & MIPS16OP_MASK_MOVE32Z)]);
1437 break;
1438
1439 case '0':
1440 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
1441 break;
1442
1443 case 'S':
1444 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[29]);
1445 break;
1446
1447 case 'P':
1448 (*info->fprintf_func) (info->stream, "$pc");
1449 break;
1450
1451 case 'R':
1452 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[31]);
1453 break;
1454
1455 case 'X':
1456 (*info->fprintf_func) (info->stream, "%s",
1457 mips_gpr_names[((l >> MIPS16OP_SH_REGR32)
1458 & MIPS16OP_MASK_REGR32)]);
1459 break;
1460
1461 case 'Y':
1462 (*info->fprintf_func) (info->stream, "%s",
1463 mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
1464 break;
1465
1466 case '<':
1467 case '>':
1468 case '[':
1469 case ']':
1470 case '4':
1471 case '5':
1472 case 'H':
1473 case 'W':
1474 case 'D':
1475 case 'j':
1476 case '6':
1477 case '8':
1478 case 'V':
1479 case 'C':
1480 case 'U':
1481 case 'k':
1482 case 'K':
1483 case 'p':
1484 case 'q':
1485 case 'A':
1486 case 'B':
1487 case 'E':
1488 {
1489 int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;
1490
1491 shift = 0;
1492 signedp = 0;
1493 extbits = 16;
1494 pcrel = 0;
1495 extu = 0;
1496 branch = 0;
1497 switch (type)
1498 {
1499 case '<':
1500 nbits = 3;
1501 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1502 extbits = 5;
1503 extu = 1;
1504 break;
1505 case '>':
1506 nbits = 3;
1507 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1508 extbits = 5;
1509 extu = 1;
1510 break;
1511 case '[':
1512 nbits = 3;
1513 immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1514 extbits = 6;
1515 extu = 1;
1516 break;
1517 case ']':
1518 nbits = 3;
1519 immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1520 extbits = 6;
1521 extu = 1;
1522 break;
1523 case '4':
1524 nbits = 4;
1525 immed = (l >> MIPS16OP_SH_IMM4) & MIPS16OP_MASK_IMM4;
1526 signedp = 1;
1527 extbits = 15;
1528 break;
1529 case '5':
1530 nbits = 5;
1531 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1532 info->insn_type = dis_dref;
1533 info->data_size = 1;
1534 break;
1535 case 'H':
1536 nbits = 5;
1537 shift = 1;
1538 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1539 info->insn_type = dis_dref;
1540 info->data_size = 2;
1541 break;
1542 case 'W':
1543 nbits = 5;
1544 shift = 2;
1545 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1546 if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
1547 && (op->pinfo & MIPS16_INSN_READ_SP) == 0)
1548 {
1549 info->insn_type = dis_dref;
1550 info->data_size = 4;
1551 }
1552 break;
1553 case 'D':
1554 nbits = 5;
1555 shift = 3;
1556 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1557 info->insn_type = dis_dref;
1558 info->data_size = 8;
1559 break;
1560 case 'j':
1561 nbits = 5;
1562 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1563 signedp = 1;
1564 break;
1565 case '6':
1566 nbits = 6;
1567 immed = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1568 break;
1569 case '8':
1570 nbits = 8;
1571 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1572 break;
1573 case 'V':
1574 nbits = 8;
1575 shift = 2;
1576 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1577 /* FIXME: This might be lw, or it might be addiu to $sp or
1578 $pc. We assume it's load. */
1579 info->insn_type = dis_dref;
1580 info->data_size = 4;
1581 break;
1582 case 'C':
1583 nbits = 8;
1584 shift = 3;
1585 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1586 info->insn_type = dis_dref;
1587 info->data_size = 8;
1588 break;
1589 case 'U':
1590 nbits = 8;
1591 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1592 extu = 1;
1593 break;
1594 case 'k':
1595 nbits = 8;
1596 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1597 signedp = 1;
1598 break;
1599 case 'K':
1600 nbits = 8;
1601 shift = 3;
1602 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1603 signedp = 1;
1604 break;
1605 case 'p':
1606 nbits = 8;
1607 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1608 signedp = 1;
1609 pcrel = 1;
1610 branch = 1;
1611 info->insn_type = dis_condbranch;
1612 break;
1613 case 'q':
1614 nbits = 11;
1615 immed = (l >> MIPS16OP_SH_IMM11) & MIPS16OP_MASK_IMM11;
1616 signedp = 1;
1617 pcrel = 1;
1618 branch = 1;
1619 info->insn_type = dis_branch;
1620 break;
1621 case 'A':
1622 nbits = 8;
1623 shift = 2;
1624 immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1625 pcrel = 1;
1626 /* FIXME: This can be lw or la. We assume it is lw. */
1627 info->insn_type = dis_dref;
1628 info->data_size = 4;
1629 break;
1630 case 'B':
1631 nbits = 5;
1632 shift = 3;
1633 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1634 pcrel = 1;
1635 info->insn_type = dis_dref;
1636 info->data_size = 8;
1637 break;
1638 case 'E':
1639 nbits = 5;
1640 shift = 2;
1641 immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1642 pcrel = 1;
1643 break;
1644 default:
1645 abort ();
1646 }
1647
1648 if (! use_extend)
1649 {
1650 if (signedp && immed >= (1 << (nbits - 1)))
1651 immed -= 1 << nbits;
1652 immed <<= shift;
1653 if ((type == '<' || type == '>' || type == '[' || type == ']')
1654 && immed == 0)
1655 immed = 8;
1656 }
1657 else
1658 {
1659 if (extbits == 16)
1660 immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
1661 else if (extbits == 15)
1662 immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
1663 else
1664 immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
1665 immed &= (1 << extbits) - 1;
1666 if (! extu && immed >= (1 << (extbits - 1)))
1667 immed -= 1 << extbits;
1668 }
1669
1670 if (! pcrel)
1671 (*info->fprintf_func) (info->stream, "%d", immed);
1672 else
1673 {
1674 bfd_vma baseaddr;
1675
1676 if (branch)
1677 {
1678 immed *= 2;
1679 baseaddr = memaddr + 2;
1680 }
1681 else if (use_extend)
1682 baseaddr = memaddr - 2;
1683 else
1684 {
1685 int status;
1686 bfd_byte buffer[2];
1687
1688 baseaddr = memaddr;
1689
1690 /* If this instruction is in the delay slot of a jr
1691 instruction, the base address is the address of the
1692 jr instruction. If it is in the delay slot of jalr
1693 instruction, the base address is the address of the
1694 jalr instruction. This test is unreliable: we have
1695 no way of knowing whether the previous word is
1696 instruction or data. */
1697 status = (*info->read_memory_func) (memaddr - 4, buffer, 2,
1698 info);
1699 if (status == 0
1700 && (((info->endian == BFD_ENDIAN_BIG
1701 ? bfd_getb16 (buffer)
1702 : bfd_getl16 (buffer))
1703 & 0xf800) == 0x1800))
1704 baseaddr = memaddr - 4;
1705 else
1706 {
1707 status = (*info->read_memory_func) (memaddr - 2, buffer,
1708 2, info);
1709 if (status == 0
1710 && (((info->endian == BFD_ENDIAN_BIG
1711 ? bfd_getb16 (buffer)
1712 : bfd_getl16 (buffer))
1713 & 0xf81f) == 0xe800))
1714 baseaddr = memaddr - 2;
1715 }
1716 }
1717 info->target = (baseaddr & ~((1 << shift) - 1)) + immed;
1718 (*info->print_address_func) (info->target, info);
1719 }
1720 }
1721 break;
1722
1723 case 'a':
1724 if (! use_extend)
1725 extend = 0;
1726 l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
1727 info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
1728 (*info->print_address_func) (info->target, info);
1729 info->insn_type = dis_jsr;
1730 info->branch_delay_insns = 1;
1731 break;
1732
1733 case 'l':
1734 case 'L':
1735 {
1736 int need_comma, amask, smask;
1737
1738 need_comma = 0;
1739
1740 l = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1741
1742 amask = (l >> 3) & 7;
1743
1744 if (amask > 0 && amask < 5)
1745 {
1746 (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[4]);
1747 if (amask > 1)
1748 (*info->fprintf_func) (info->stream, "-%s",
1749 mips_gpr_names[amask + 3]);
1750 need_comma = 1;
1751 }
1752
1753 smask = (l >> 1) & 3;
1754 if (smask == 3)
1755 {
1756 (*info->fprintf_func) (info->stream, "%s??",
1757 need_comma ? "," : "");
1758 need_comma = 1;
1759 }
1760 else if (smask > 0)
1761 {
1762 (*info->fprintf_func) (info->stream, "%s%s",
1763 need_comma ? "," : "",
1764 mips_gpr_names[16]);
1765 if (smask > 1)
1766 (*info->fprintf_func) (info->stream, "-%s",
1767 mips_gpr_names[smask + 15]);
1768 need_comma = 1;
1769 }
1770
1771 if (l & 1)
1772 {
1773 (*info->fprintf_func) (info->stream, "%s%s",
1774 need_comma ? "," : "",
1775 mips_gpr_names[31]);
1776 need_comma = 1;
1777 }
1778
1779 if (amask == 5 || amask == 6)
1780 {
1781 (*info->fprintf_func) (info->stream, "%s$f0",
1782 need_comma ? "," : "");
1783 if (amask == 6)
1784 (*info->fprintf_func) (info->stream, "-$f1");
1785 }
1786 }
1787 break;
1788
1789 default:
1790 /* xgettext:c-format */
1791 (*info->fprintf_func)
1792 (info->stream,
1793 _("# internal disassembler error, unrecognised modifier (%c)"),
1794 type);
1795 abort ();
1796 }
1797 }
1798
1799 void
1800 print_mips_disassembler_options (stream)
1801 FILE *stream;
1802 {
1803 unsigned int i;
1804
1805 fprintf (stream, _("\n\
1806 The following MIPS specific disassembler options are supported for use\n\
1807 with the -M switch (multiple options should be separated by commas):\n"));
1808
1809 fprintf (stream, _("\n\
1810 gpr-names=ABI Print GPR names according to specified ABI.\n\
1811 Default: based on binary being disassembled.\n"));
1812
1813 fprintf (stream, _("\n\
1814 fpr-names=ABI Print FPR names according to specified ABI.\n\
1815 Default: numeric.\n"));
1816
1817 fprintf (stream, _("\n\
1818 cp0-names=ARCH Print CP0 register names according to\n\
1819 specified architecture.\n\
1820 Default: based on binary being disassembled.\n"));
1821
1822 fprintf (stream, _("\n\
1823 hwr-names=ARCH Print HWR names according to specified \n\
1824 architecture.\n\
1825 Default: based on binary being disassembled.\n"));
1826
1827 fprintf (stream, _("\n\
1828 reg-names=ABI Print GPR and FPR names according to\n\
1829 specified ABI.\n"));
1830
1831 fprintf (stream, _("\n\
1832 reg-names=ARCH Print CP0 register and HWR names according to\n\
1833 specified architecture.\n"));
1834
1835 fprintf (stream, _("\n\
1836 For the options above, the following values are supported for \"ABI\":\n\
1837 "));
1838 for (i = 0; i < ARRAY_SIZE (mips_abi_choices); i++)
1839 fprintf (stream, " %s", mips_abi_choices[i].name);
1840 fprintf (stream, _("\n"));
1841
1842 fprintf (stream, _("\n\
1843 For the options above, The following values are supported for \"ARCH\":\n\
1844 "));
1845 for (i = 0; i < ARRAY_SIZE (mips_arch_choices); i++)
1846 if (*mips_arch_choices[i].name != '\0')
1847 fprintf (stream, " %s", mips_arch_choices[i].name);
1848 fprintf (stream, _("\n"));
1849
1850 fprintf (stream, _("\n"));
1851 }
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