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root/cebix/mon/src/disass/mips-dis.c
Revision: 1.1
Committed: 2007-06-07T09:51:56Z (17 years ago) by gbeauche
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Log Message:
Add MIPS disassembler invoked as "dm" and "dmel" (little-endian) for now.

File Contents

# User Rev Content
1 gbeauche 1.1 /* 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 "dis-asm.h"
25     #include "mips.h"
26     #include "opintl.h"
27    
28    
29     #define EMBEDDED_ENV 1
30    
31     /* FIXME: the following code snippets are not part of the original
32     binutils disassembler and should be moved elsewhere. */
33    
34     #ifndef ARRAY_SIZE
35     #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
36     #endif
37    
38     static bfd_vma
39     bfd_getb16 (const void *p)
40     {
41     const bfd_byte *addr = p;
42     return (addr[0] << 8) | addr[1];
43     }
44    
45     static bfd_vma
46     bfd_getl16 (const void *p)
47     {
48     const bfd_byte *addr = p;
49     return (addr[1] << 8) | addr[0];
50     }
51    
52     static bfd_vma
53     bfd_getb32 (const void *p)
54     {
55     const bfd_byte *addr = p;
56     unsigned long v;
57    
58     v = (unsigned long) addr[0] << 24;
59     v |= (unsigned long) addr[1] << 16;
60     v |= (unsigned long) addr[2] << 8;
61     v |= (unsigned long) addr[3];
62     return v;
63     }
64    
65     static bfd_vma
66     bfd_getl32 (const void *p)
67     {
68     const bfd_byte *addr = p;
69     unsigned long v;
70    
71     v = (unsigned long) addr[0];
72     v |= (unsigned long) addr[1] << 8;
73     v |= (unsigned long) addr[2] << 16;
74     v |= (unsigned long) addr[3] << 24;
75     return v;
76     }
77    
78    
79     /* FIXME: These are needed to figure out if the code is mips16 or
80     not. The low bit of the address is often a good indicator. No
81     symbol table is available when this code runs out in an embedded
82     system as when it is used for disassembler support in a monitor. */
83    
84     #if !defined(EMBEDDED_ENV)
85     #define SYMTAB_AVAILABLE 1
86     #include "elf-bfd.h"
87     #include "elf/mips.h"
88     #endif
89    
90     /* Mips instructions are at maximum this many bytes long. */
91     #define INSNLEN 4
92    
93    
94     /* FIXME: These should be shared with gdb somehow. */
95    
96     struct mips_cp0sel_name
97     {
98     unsigned int cp0reg;
99     unsigned int sel;
100     const char * const name;
101     };
102    
103     /* The mips16 registers. */
104     static const unsigned int mips16_to_32_reg_map[] =
105     {
106     16, 17, 2, 3, 4, 5, 6, 7
107     };
108    
109     #define mips16_reg_names(rn) mips_gpr_names[mips16_to_32_reg_map[rn]]
110    
111    
112     static const char * const mips_gpr_names_numeric[32] =
113     {
114     "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
115     "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
116     "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
117     "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
118     };
119    
120     static const char * const mips_gpr_names_oldabi[32] =
121     {
122     "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
123     "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
124     "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
125     "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
126     };
127    
128     static const char * const mips_gpr_names_newabi[32] =
129     {
130     "zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
131     "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
132     "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
133     "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
134     };
135    
136     static const char * const mips_fpr_names_numeric[32] =
137     {
138     "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7",
139     "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15",
140     "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23",
141     "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31"
142     };
143    
144     static const char * const mips_fpr_names_32[32] =
145     {
146     "fv0", "fv0f", "fv1", "fv1f", "ft0", "ft0f", "ft1", "ft1f",
147     "ft2", "ft2f", "ft3", "ft3f", "fa0", "fa0f", "fa1", "fa1f",
148     "ft4", "ft4f", "ft5", "ft5f", "fs0", "fs0f", "fs1", "fs1f",
149     "fs2", "fs2f", "fs3", "fs3f", "fs4", "fs4f", "fs5", "fs5f"
150     };
151    
152     static const char * const mips_fpr_names_n32[32] =
153     {
154     "fv0", "ft14", "fv1", "ft15", "ft0", "ft1", "ft2", "ft3",
155     "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
156     "fa4", "fa5", "fa6", "fa7", "fs0", "ft8", "fs1", "ft9",
157     "fs2", "ft10", "fs3", "ft11", "fs4", "ft12", "fs5", "ft13"
158     };
159    
160     static const char * const mips_fpr_names_64[32] =
161     {
162     "fv0", "ft12", "fv1", "ft13", "ft0", "ft1", "ft2", "ft3",
163     "ft4", "ft5", "ft6", "ft7", "fa0", "fa1", "fa2", "fa3",
164     "fa4", "fa5", "fa6", "fa7", "ft8", "ft9", "ft10", "ft11",
165     "fs0", "fs1", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7"
166     };
167    
168     static const char * const mips_cp0_names_numeric[32] =
169     {
170     "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
171     "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
172     "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
173     "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
174     };
175    
176     static const char * const mips_cp0_names_mips3264[32] =
177     {
178     "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
179     "c0_context", "c0_pagemask", "c0_wired", "$7",
180     "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
181     "c0_status", "c0_cause", "c0_epc", "c0_prid",
182     "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
183     "c0_xcontext", "$21", "$22", "c0_debug",
184     "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
185     "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
186     };
187    
188     static const struct mips_cp0sel_name mips_cp0sel_names_mips3264[] =
189     {
190     { 16, 1, "c0_config1" },
191     { 16, 2, "c0_config2" },
192     { 16, 3, "c0_config3" },
193     { 18, 1, "c0_watchlo,1" },
194     { 18, 2, "c0_watchlo,2" },
195     { 18, 3, "c0_watchlo,3" },
196     { 18, 4, "c0_watchlo,4" },
197     { 18, 5, "c0_watchlo,5" },
198     { 18, 6, "c0_watchlo,6" },
199     { 18, 7, "c0_watchlo,7" },
200     { 19, 1, "c0_watchhi,1" },
201     { 19, 2, "c0_watchhi,2" },
202     { 19, 3, "c0_watchhi,3" },
203     { 19, 4, "c0_watchhi,4" },
204     { 19, 5, "c0_watchhi,5" },
205     { 19, 6, "c0_watchhi,6" },
206     { 19, 7, "c0_watchhi,7" },
207     { 25, 1, "c0_perfcnt,1" },
208     { 25, 2, "c0_perfcnt,2" },
209     { 25, 3, "c0_perfcnt,3" },
210     { 25, 4, "c0_perfcnt,4" },
211     { 25, 5, "c0_perfcnt,5" },
212     { 25, 6, "c0_perfcnt,6" },
213     { 25, 7, "c0_perfcnt,7" },
214     { 27, 1, "c0_cacheerr,1" },
215     { 27, 2, "c0_cacheerr,2" },
216     { 27, 3, "c0_cacheerr,3" },
217     { 28, 1, "c0_datalo" },
218     { 29, 1, "c0_datahi" }
219     };
220    
221     static const char * const mips_cp0_names_mips3264r2[32] =
222     {
223     "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
224     "c0_context", "c0_pagemask", "c0_wired", "c0_hwrena",
225     "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
226     "c0_status", "c0_cause", "c0_epc", "c0_prid",
227     "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
228     "c0_xcontext", "$21", "$22", "c0_debug",
229     "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr",
230     "c0_taglo", "c0_taghi", "c0_errorepc", "c0_desave",
231     };
232    
233     static const struct mips_cp0sel_name mips_cp0sel_names_mips3264r2[] =
234     {
235     { 4, 1, "c0_contextconfig" },
236     { 0, 1, "c0_mvpcontrol" },
237     { 0, 2, "c0_mvpconf0" },
238     { 0, 3, "c0_mvpconf1" },
239     { 1, 1, "c0_vpecontrol" },
240     { 1, 2, "c0_vpeconf0" },
241     { 1, 3, "c0_vpeconf1" },
242     { 1, 4, "c0_yqmask" },
243     { 1, 5, "c0_vpeschedule" },
244     { 1, 6, "c0_vpeschefback" },
245     { 2, 1, "c0_tcstatus" },
246     { 2, 2, "c0_tcbind" },
247     { 2, 3, "c0_tcrestart" },
248     { 2, 4, "c0_tchalt" },
249     { 2, 5, "c0_tccontext" },
250     { 2, 6, "c0_tcschedule" },
251     { 2, 7, "c0_tcschefback" },
252     { 5, 1, "c0_pagegrain" },
253     { 6, 1, "c0_srsconf0" },
254     { 6, 2, "c0_srsconf1" },
255     { 6, 3, "c0_srsconf2" },
256     { 6, 4, "c0_srsconf3" },
257     { 6, 5, "c0_srsconf4" },
258     { 12, 1, "c0_intctl" },
259     { 12, 2, "c0_srsctl" },
260     { 12, 3, "c0_srsmap" },
261     { 15, 1, "c0_ebase" },
262     { 16, 1, "c0_config1" },
263     { 16, 2, "c0_config2" },
264     { 16, 3, "c0_config3" },
265     { 18, 1, "c0_watchlo,1" },
266     { 18, 2, "c0_watchlo,2" },
267     { 18, 3, "c0_watchlo,3" },
268     { 18, 4, "c0_watchlo,4" },
269     { 18, 5, "c0_watchlo,5" },
270     { 18, 6, "c0_watchlo,6" },
271     { 18, 7, "c0_watchlo,7" },
272     { 19, 1, "c0_watchhi,1" },
273     { 19, 2, "c0_watchhi,2" },
274     { 19, 3, "c0_watchhi,3" },
275     { 19, 4, "c0_watchhi,4" },
276     { 19, 5, "c0_watchhi,5" },
277     { 19, 6, "c0_watchhi,6" },
278     { 19, 7, "c0_watchhi,7" },
279     { 23, 1, "c0_tracecontrol" },
280     { 23, 2, "c0_tracecontrol2" },
281     { 23, 3, "c0_usertracedata" },
282     { 23, 4, "c0_tracebpc" },
283     { 25, 1, "c0_perfcnt,1" },
284     { 25, 2, "c0_perfcnt,2" },
285     { 25, 3, "c0_perfcnt,3" },
286     { 25, 4, "c0_perfcnt,4" },
287     { 25, 5, "c0_perfcnt,5" },
288     { 25, 6, "c0_perfcnt,6" },
289     { 25, 7, "c0_perfcnt,7" },
290     { 27, 1, "c0_cacheerr,1" },
291     { 27, 2, "c0_cacheerr,2" },
292     { 27, 3, "c0_cacheerr,3" },
293     { 28, 1, "c0_datalo" },
294     { 28, 2, "c0_taglo1" },
295     { 28, 3, "c0_datalo1" },
296     { 28, 4, "c0_taglo2" },
297     { 28, 5, "c0_datalo2" },
298     { 28, 6, "c0_taglo3" },
299     { 28, 7, "c0_datalo3" },
300     { 29, 1, "c0_datahi" },
301     { 29, 2, "c0_taghi1" },
302     { 29, 3, "c0_datahi1" },
303     { 29, 4, "c0_taghi2" },
304     { 29, 5, "c0_datahi2" },
305     { 29, 6, "c0_taghi3" },
306     { 29, 7, "c0_datahi3" },
307     };
308    
309     /* SB-1: MIPS64 (mips_cp0_names_mips3264) with minor mods. */
310     static const char * const mips_cp0_names_sb1[32] =
311     {
312     "c0_index", "c0_random", "c0_entrylo0", "c0_entrylo1",
313     "c0_context", "c0_pagemask", "c0_wired", "$7",
314     "c0_badvaddr", "c0_count", "c0_entryhi", "c0_compare",
315     "c0_status", "c0_cause", "c0_epc", "c0_prid",
316     "c0_config", "c0_lladdr", "c0_watchlo", "c0_watchhi",
317     "c0_xcontext", "$21", "$22", "c0_debug",
318     "c0_depc", "c0_perfcnt", "c0_errctl", "c0_cacheerr_i",
319     "c0_taglo_i", "c0_taghi_i", "c0_errorepc", "c0_desave",
320     };
321    
322     static const struct mips_cp0sel_name mips_cp0sel_names_sb1[] =
323     {
324     { 16, 1, "c0_config1" },
325     { 18, 1, "c0_watchlo,1" },
326     { 19, 1, "c0_watchhi,1" },
327     { 22, 0, "c0_perftrace" },
328     { 23, 3, "c0_edebug" },
329     { 25, 1, "c0_perfcnt,1" },
330     { 25, 2, "c0_perfcnt,2" },
331     { 25, 3, "c0_perfcnt,3" },
332     { 25, 4, "c0_perfcnt,4" },
333     { 25, 5, "c0_perfcnt,5" },
334     { 25, 6, "c0_perfcnt,6" },
335     { 25, 7, "c0_perfcnt,7" },
336     { 26, 1, "c0_buserr_pa" },
337     { 27, 1, "c0_cacheerr_d" },
338     { 27, 3, "c0_cacheerr_d_pa" },
339     { 28, 1, "c0_datalo_i" },
340     { 28, 2, "c0_taglo_d" },
341     { 28, 3, "c0_datalo_d" },
342     { 29, 1, "c0_datahi_i" },
343     { 29, 2, "c0_taghi_d" },
344     { 29, 3, "c0_datahi_d" },
345     };
346    
347     static const char * const mips_hwr_names_numeric[32] =
348     {
349     "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",
350     "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
351     "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
352     "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
353     };
354    
355     static const char * const mips_hwr_names_mips3264r2[32] =
356     {
357     "hwr_cpunum", "hwr_synci_step", "hwr_cc", "hwr_ccres",
358     "$4", "$5", "$6", "$7",
359     "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",
360     "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",
361     "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31"
362     };
363    
364     struct mips_abi_choice
365     {
366     const char * name;
367     const char * const *gpr_names;
368     const char * const *fpr_names;
369     };
370    
371     struct mips_abi_choice mips_abi_choices[] =
372     {
373     { "numeric", mips_gpr_names_numeric, mips_fpr_names_numeric },
374     { "32", mips_gpr_names_oldabi, mips_fpr_names_32 },
375     { "n32", mips_gpr_names_newabi, mips_fpr_names_n32 },
376     { "64", mips_gpr_names_newabi, mips_fpr_names_64 },
377     };
378    
379     struct mips_arch_choice
380     {
381     const char *name;
382     int bfd_mach_valid;
383     unsigned long bfd_mach;
384     int processor;
385     int isa;
386     const char * const *cp0_names;
387     const struct mips_cp0sel_name *cp0sel_names;
388     unsigned int cp0sel_names_len;
389     const char * const *hwr_names;
390     };
391    
392     const struct mips_arch_choice mips_arch_choices[] =
393     {
394     { "numeric", 0, 0, 0, 0,
395     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
396    
397     { "r3000", 1, bfd_mach_mips3000, CPU_R3000, ISA_MIPS1,
398     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
399     { "r3900", 1, bfd_mach_mips3900, CPU_R3900, ISA_MIPS1,
400     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
401     { "r4000", 1, bfd_mach_mips4000, CPU_R4000, ISA_MIPS3,
402     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
403     { "r4010", 1, bfd_mach_mips4010, CPU_R4010, ISA_MIPS2,
404     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
405     { "vr4100", 1, bfd_mach_mips4100, CPU_VR4100, ISA_MIPS3,
406     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
407     { "vr4111", 1, bfd_mach_mips4111, CPU_R4111, ISA_MIPS3,
408     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
409     { "vr4120", 1, bfd_mach_mips4120, CPU_VR4120, ISA_MIPS3,
410     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
411     { "r4300", 1, bfd_mach_mips4300, CPU_R4300, ISA_MIPS3,
412     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
413     { "r4400", 1, bfd_mach_mips4400, CPU_R4400, ISA_MIPS3,
414     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
415     { "r4600", 1, bfd_mach_mips4600, CPU_R4600, ISA_MIPS3,
416     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
417     { "r4650", 1, bfd_mach_mips4650, CPU_R4650, ISA_MIPS3,
418     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
419     { "r5000", 1, bfd_mach_mips5000, CPU_R5000, ISA_MIPS4,
420     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
421     { "vr5400", 1, bfd_mach_mips5400, CPU_VR5400, ISA_MIPS4,
422     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
423     { "vr5500", 1, bfd_mach_mips5500, CPU_VR5500, ISA_MIPS4,
424     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
425     { "r6000", 1, bfd_mach_mips6000, CPU_R6000, ISA_MIPS2,
426     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
427     { "rm7000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
428     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
429     { "rm9000", 1, bfd_mach_mips7000, CPU_RM7000, ISA_MIPS4,
430     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
431     { "r8000", 1, bfd_mach_mips8000, CPU_R8000, ISA_MIPS4,
432     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
433     { "r10000", 1, bfd_mach_mips10000, CPU_R10000, ISA_MIPS4,
434     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
435     { "r12000", 1, bfd_mach_mips12000, CPU_R12000, ISA_MIPS4,
436     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
437     { "mips5", 1, bfd_mach_mips5, CPU_MIPS5, ISA_MIPS5,
438     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
439    
440     /* For stock MIPS32, disassemble all applicable MIPS-specified ASEs.
441     Note that MIPS-3D and MDMX are not applicable to MIPS32. (See
442     _MIPS32 Architecture For Programmers Volume I: Introduction to the
443     MIPS32 Architecture_ (MIPS Document Number MD00082, Revision 0.95),
444     page 1. */
445     { "mips32", 1, bfd_mach_mipsisa32, CPU_MIPS32,
446     ISA_MIPS32 | INSN_MIPS16 | INSN_SMARTMIPS,
447     mips_cp0_names_mips3264,
448     mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
449     mips_hwr_names_numeric },
450    
451     { "mips32r2", 1, bfd_mach_mipsisa32r2, CPU_MIPS32R2,
452     (ISA_MIPS32R2 | INSN_MIPS16 | INSN_SMARTMIPS | INSN_DSP | INSN_MIPS3D
453     | INSN_MT),
454     mips_cp0_names_mips3264r2,
455     mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
456     mips_hwr_names_mips3264r2 },
457    
458     /* For stock MIPS64, disassemble all applicable MIPS-specified ASEs. */
459     { "mips64", 1, bfd_mach_mipsisa64, CPU_MIPS64,
460     ISA_MIPS64 | INSN_MIPS16 | INSN_MIPS3D | INSN_MDMX,
461     mips_cp0_names_mips3264,
462     mips_cp0sel_names_mips3264, ARRAY_SIZE (mips_cp0sel_names_mips3264),
463     mips_hwr_names_numeric },
464    
465     { "mips64r2", 1, bfd_mach_mipsisa64r2, CPU_MIPS64R2,
466     (ISA_MIPS64R2 | INSN_MIPS16 | INSN_MIPS3D | INSN_DSP | INSN_DSP64
467     | INSN_MT | INSN_MDMX),
468     mips_cp0_names_mips3264r2,
469     mips_cp0sel_names_mips3264r2, ARRAY_SIZE (mips_cp0sel_names_mips3264r2),
470     mips_hwr_names_mips3264r2 },
471    
472     { "sb1", 1, bfd_mach_mips_sb1, CPU_SB1,
473     ISA_MIPS64 | INSN_MIPS3D | INSN_SB1,
474     mips_cp0_names_sb1,
475     mips_cp0sel_names_sb1, ARRAY_SIZE (mips_cp0sel_names_sb1),
476     mips_hwr_names_numeric },
477    
478     /* This entry, mips16, is here only for ISA/processor selection; do
479     not print its name. */
480     { "", 1, bfd_mach_mips16, CPU_MIPS16, ISA_MIPS3 | INSN_MIPS16,
481     mips_cp0_names_numeric, NULL, 0, mips_hwr_names_numeric },
482     };
483    
484     /* ISA and processor type to disassemble for, and register names to use.
485     set_default_mips_dis_options and parse_mips_dis_options fill in these
486     values. */
487     static int mips_processor;
488     static int mips_isa;
489     static const char * const *mips_gpr_names;
490     static const char * const *mips_fpr_names;
491     static const char * const *mips_cp0_names;
492     static const struct mips_cp0sel_name *mips_cp0sel_names;
493     static int mips_cp0sel_names_len;
494     static const char * const *mips_hwr_names;
495    
496     /* Other options */
497     static int no_aliases; /* If set disassemble as most general inst. */
498    
499     static const struct mips_abi_choice *
500     choose_abi_by_name (const char *name, unsigned int namelen)
501     {
502     const struct mips_abi_choice *c;
503     unsigned int i;
504    
505     for (i = 0, c = NULL; i < ARRAY_SIZE (mips_abi_choices) && c == NULL; i++)
506     if (strncmp (mips_abi_choices[i].name, name, namelen) == 0
507     && strlen (mips_abi_choices[i].name) == namelen)
508     c = &mips_abi_choices[i];
509    
510     return c;
511     }
512    
513     static const struct mips_arch_choice *
514     choose_arch_by_name (const char *name, unsigned int namelen)
515     {
516     const struct mips_arch_choice *c = NULL;
517     unsigned int i;
518    
519     for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
520     if (strncmp (mips_arch_choices[i].name, name, namelen) == 0
521     && strlen (mips_arch_choices[i].name) == namelen)
522     c = &mips_arch_choices[i];
523    
524     return c;
525     }
526    
527     static const struct mips_arch_choice *
528     choose_arch_by_number (unsigned long mach)
529     {
530     static unsigned long hint_bfd_mach;
531     static const struct mips_arch_choice *hint_arch_choice;
532     const struct mips_arch_choice *c;
533     unsigned int i;
534    
535     /* We optimize this because even if the user specifies no
536     flags, this will be done for every instruction! */
537     if (hint_bfd_mach == mach
538     && hint_arch_choice != NULL
539     && hint_arch_choice->bfd_mach == hint_bfd_mach)
540     return hint_arch_choice;
541    
542     for (i = 0, c = NULL; i < ARRAY_SIZE (mips_arch_choices) && c == NULL; i++)
543     {
544     if (mips_arch_choices[i].bfd_mach_valid
545     && mips_arch_choices[i].bfd_mach == mach)
546     {
547     c = &mips_arch_choices[i];
548     hint_bfd_mach = mach;
549     hint_arch_choice = c;
550     }
551     }
552     return c;
553     }
554    
555     /* Check if the object uses NewABI conventions. */
556    
557     #if SYMTAB_AVAILABLE
558     static int
559     is_newabi (Elf_Internal_Ehdr *header)
560     {
561     /* There are no old-style ABIs which use 64-bit ELF. */
562     if (header->e_ident[EI_CLASS] == ELFCLASS64)
563     return 1;
564    
565     /* If a 32-bit ELF file, n32 is a new-style ABI. */
566     if ((header->e_flags & EF_MIPS_ABI2) != 0)
567     return 1;
568    
569     return 0;
570     }
571     #endif
572    
573     static void
574     set_default_mips_dis_options (struct disassemble_info *info)
575     {
576     const struct mips_arch_choice *chosen_arch;
577    
578     /* Defaults: mipsIII/r3000 (?!), (o)32-style ("oldabi") GPR names,
579     and numeric FPR, CP0 register, and HWR names. */
580     mips_isa = ISA_MIPS3;
581     mips_processor = CPU_R3000;
582     mips_gpr_names = mips_gpr_names_oldabi;
583     mips_fpr_names = mips_fpr_names_numeric;
584     mips_cp0_names = mips_cp0_names_numeric;
585     mips_cp0sel_names = NULL;
586     mips_cp0sel_names_len = 0;
587     mips_hwr_names = mips_hwr_names_numeric;
588     no_aliases = 0;
589    
590     /* If an ELF "newabi" binary, use the n32/(n)64 GPR names. */
591     #if SYMTAB_AVAILABLE
592     if (info->flavour == bfd_target_elf_flavour && info->section != NULL)
593     {
594     Elf_Internal_Ehdr *header;
595    
596     header = elf_elfheader (info->section->owner);
597     if (is_newabi (header))
598     mips_gpr_names = mips_gpr_names_newabi;
599     }
600     #endif
601    
602     /* Set ISA, architecture, and cp0 register names as best we can. */
603     #if ! SYMTAB_AVAILABLE && 0
604     /* This is running out on a target machine, not in a host tool.
605     FIXME: Where does mips_target_info come from? */
606     mips_processor = mips_target_info.processor;
607     mips_isa = mips_target_info.isa;
608     #else
609     chosen_arch = choose_arch_by_number (info->mach);
610     if (chosen_arch != NULL)
611     {
612     mips_processor = chosen_arch->processor;
613     mips_isa = chosen_arch->isa;
614     mips_cp0_names = chosen_arch->cp0_names;
615     mips_cp0sel_names = chosen_arch->cp0sel_names;
616     mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
617     mips_hwr_names = chosen_arch->hwr_names;
618     }
619     #endif
620     }
621    
622     static void
623     parse_mips_dis_option (const char *option, unsigned int len)
624     {
625     unsigned int i, optionlen, vallen;
626     const char *val;
627     const struct mips_abi_choice *chosen_abi;
628     const struct mips_arch_choice *chosen_arch;
629    
630     /* Try to match options that are simple flags */
631     if (CONST_STRNEQ (option, "no-aliases"))
632     {
633     no_aliases = 1;
634     return;
635     }
636    
637     /* Look for the = that delimits the end of the option name. */
638     for (i = 0; i < len; i++)
639     if (option[i] == '=')
640     break;
641    
642     if (i == 0) /* Invalid option: no name before '='. */
643     return;
644     if (i == len) /* Invalid option: no '='. */
645     return;
646     if (i == (len - 1)) /* Invalid option: no value after '='. */
647     return;
648    
649     optionlen = i;
650     val = option + (optionlen + 1);
651     vallen = len - (optionlen + 1);
652    
653     if (strncmp ("gpr-names", option, optionlen) == 0
654     && strlen ("gpr-names") == optionlen)
655     {
656     chosen_abi = choose_abi_by_name (val, vallen);
657     if (chosen_abi != NULL)
658     mips_gpr_names = chosen_abi->gpr_names;
659     return;
660     }
661    
662     if (strncmp ("fpr-names", option, optionlen) == 0
663     && strlen ("fpr-names") == optionlen)
664     {
665     chosen_abi = choose_abi_by_name (val, vallen);
666     if (chosen_abi != NULL)
667     mips_fpr_names = chosen_abi->fpr_names;
668     return;
669     }
670    
671     if (strncmp ("cp0-names", option, optionlen) == 0
672     && strlen ("cp0-names") == optionlen)
673     {
674     chosen_arch = choose_arch_by_name (val, vallen);
675     if (chosen_arch != NULL)
676     {
677     mips_cp0_names = chosen_arch->cp0_names;
678     mips_cp0sel_names = chosen_arch->cp0sel_names;
679     mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
680     }
681     return;
682     }
683    
684     if (strncmp ("hwr-names", option, optionlen) == 0
685     && strlen ("hwr-names") == optionlen)
686     {
687     chosen_arch = choose_arch_by_name (val, vallen);
688     if (chosen_arch != NULL)
689     mips_hwr_names = chosen_arch->hwr_names;
690     return;
691     }
692    
693     if (strncmp ("reg-names", option, optionlen) == 0
694     && strlen ("reg-names") == optionlen)
695     {
696     /* We check both ABI and ARCH here unconditionally, so
697     that "numeric" will do the desirable thing: select
698     numeric register names for all registers. Other than
699     that, a given name probably won't match both. */
700     chosen_abi = choose_abi_by_name (val, vallen);
701     if (chosen_abi != NULL)
702     {
703     mips_gpr_names = chosen_abi->gpr_names;
704     mips_fpr_names = chosen_abi->fpr_names;
705     }
706     chosen_arch = choose_arch_by_name (val, vallen);
707     if (chosen_arch != NULL)
708     {
709     mips_cp0_names = chosen_arch->cp0_names;
710     mips_cp0sel_names = chosen_arch->cp0sel_names;
711     mips_cp0sel_names_len = chosen_arch->cp0sel_names_len;
712     mips_hwr_names = chosen_arch->hwr_names;
713     }
714     return;
715     }
716    
717     /* Invalid option. */
718     }
719    
720     static void
721     parse_mips_dis_options (const char *options)
722     {
723     const char *option_end;
724    
725     if (options == NULL)
726     return;
727    
728     while (*options != '\0')
729     {
730     /* Skip empty options. */
731     if (*options == ',')
732     {
733     options++;
734     continue;
735     }
736    
737     /* We know that *options is neither NUL or a comma. */
738     option_end = options + 1;
739     while (*option_end != ',' && *option_end != '\0')
740     option_end++;
741    
742     parse_mips_dis_option (options, option_end - options);
743    
744     /* Go on to the next one. If option_end points to a comma, it
745     will be skipped above. */
746     options = option_end;
747     }
748     }
749    
750     static const struct mips_cp0sel_name *
751     lookup_mips_cp0sel_name (const struct mips_cp0sel_name *names,
752     unsigned int len,
753     unsigned int cp0reg,
754     unsigned int sel)
755     {
756     unsigned int i;
757    
758     for (i = 0; i < len; i++)
759     if (names[i].cp0reg == cp0reg && names[i].sel == sel)
760     return &names[i];
761     return NULL;
762     }
763    
764     /* Print insn arguments for 32/64-bit code. */
765    
766     static void
767     print_insn_args (const char *d,
768     register unsigned long int l,
769     bfd_vma pc,
770     struct disassemble_info *info,
771     const struct mips_opcode *opp)
772     {
773     int op, delta;
774     unsigned int lsb, msb, msbd;
775    
776     lsb = 0;
777    
778     for (; *d != '\0'; d++)
779     {
780     switch (*d)
781     {
782     case ',':
783     case '(':
784     case ')':
785     case '[':
786     case ']':
787     (*info->fprintf_func) (info->stream, "%c", *d);
788     break;
789    
790     case '+':
791     /* Extension character; switch for second char. */
792     d++;
793     switch (*d)
794     {
795     case '\0':
796     /* xgettext:c-format */
797     (*info->fprintf_func) (info->stream,
798     _("# internal error, incomplete extension sequence (+)"));
799     return;
800    
801     case 'A':
802     lsb = (l >> OP_SH_SHAMT) & OP_MASK_SHAMT;
803     (*info->fprintf_func) (info->stream, "0x%x", lsb);
804     break;
805    
806     case 'B':
807     msb = (l >> OP_SH_INSMSB) & OP_MASK_INSMSB;
808     (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
809     break;
810    
811     case '1':
812     (*info->fprintf_func) (info->stream, "0x%lx",
813     (l >> OP_SH_UDI1) & OP_MASK_UDI1);
814     break;
815    
816     case '2':
817     (*info->fprintf_func) (info->stream, "0x%lx",
818     (l >> OP_SH_UDI2) & OP_MASK_UDI2);
819     break;
820    
821     case '3':
822     (*info->fprintf_func) (info->stream, "0x%lx",
823     (l >> OP_SH_UDI3) & OP_MASK_UDI3);
824     break;
825    
826     case '4':
827     (*info->fprintf_func) (info->stream, "0x%lx",
828     (l >> OP_SH_UDI4) & OP_MASK_UDI4);
829     break;
830    
831     case 'C':
832     case 'H':
833     msbd = (l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD;
834     (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
835     break;
836    
837     case 'D':
838     {
839     const struct mips_cp0sel_name *n;
840     unsigned int cp0reg, sel;
841    
842     cp0reg = (l >> OP_SH_RD) & OP_MASK_RD;
843     sel = (l >> OP_SH_SEL) & OP_MASK_SEL;
844    
845     /* CP0 register including 'sel' code for mtcN (et al.), to be
846     printed textually if known. If not known, print both
847     CP0 register name and sel numerically since CP0 register
848     with sel 0 may have a name unrelated to register being
849     printed. */
850     n = lookup_mips_cp0sel_name(mips_cp0sel_names,
851     mips_cp0sel_names_len, cp0reg, sel);
852     if (n != NULL)
853     (*info->fprintf_func) (info->stream, "%s", n->name);
854     else
855     (*info->fprintf_func) (info->stream, "$%d,%d", cp0reg, sel);
856     break;
857     }
858    
859     case 'E':
860     lsb = ((l >> OP_SH_SHAMT) & OP_MASK_SHAMT) + 32;
861     (*info->fprintf_func) (info->stream, "0x%x", lsb);
862     break;
863    
864     case 'F':
865     msb = ((l >> OP_SH_INSMSB) & OP_MASK_INSMSB) + 32;
866     (*info->fprintf_func) (info->stream, "0x%x", msb - lsb + 1);
867     break;
868    
869     case 'G':
870     msbd = ((l >> OP_SH_EXTMSBD) & OP_MASK_EXTMSBD) + 32;
871     (*info->fprintf_func) (info->stream, "0x%x", msbd + 1);
872     break;
873    
874     case 't': /* Coprocessor 0 reg name */
875     (*info->fprintf_func) (info->stream, "%s",
876     mips_cp0_names[(l >> OP_SH_RT) &
877     OP_MASK_RT]);
878     break;
879    
880     case 'T': /* Coprocessor 0 reg name */
881     {
882     const struct mips_cp0sel_name *n;
883     unsigned int cp0reg, sel;
884    
885     cp0reg = (l >> OP_SH_RT) & OP_MASK_RT;
886     sel = (l >> OP_SH_SEL) & OP_MASK_SEL;
887    
888     /* CP0 register including 'sel' code for mftc0, to be
889     printed textually if known. If not known, print both
890     CP0 register name and sel numerically since CP0 register
891     with sel 0 may have a name unrelated to register being
892     printed. */
893     n = lookup_mips_cp0sel_name(mips_cp0sel_names,
894     mips_cp0sel_names_len, cp0reg, sel);
895     if (n != NULL)
896     (*info->fprintf_func) (info->stream, "%s", n->name);
897     else
898     (*info->fprintf_func) (info->stream, "$%d,%d", cp0reg, sel);
899     break;
900     }
901    
902     default:
903     /* xgettext:c-format */
904     (*info->fprintf_func) (info->stream,
905     _("# internal error, undefined extension sequence (+%c)"),
906     *d);
907     return;
908     }
909     break;
910    
911     case '3':
912     (*info->fprintf_func) (info->stream, "0x%lx",
913     (l >> OP_SH_SA3) & OP_MASK_SA3);
914     break;
915    
916     case '4':
917     (*info->fprintf_func) (info->stream, "0x%lx",
918     (l >> OP_SH_SA4) & OP_MASK_SA4);
919     break;
920    
921     case '5':
922     (*info->fprintf_func) (info->stream, "0x%lx",
923     (l >> OP_SH_IMM8) & OP_MASK_IMM8);
924     break;
925    
926     case '6':
927     (*info->fprintf_func) (info->stream, "0x%lx",
928     (l >> OP_SH_RS) & OP_MASK_RS);
929     break;
930    
931     case '7':
932     (*info->fprintf_func) (info->stream, "$ac%ld",
933     (l >> OP_SH_DSPACC) & OP_MASK_DSPACC);
934     break;
935    
936     case '8':
937     (*info->fprintf_func) (info->stream, "0x%lx",
938     (l >> OP_SH_WRDSP) & OP_MASK_WRDSP);
939     break;
940    
941     case '9':
942     (*info->fprintf_func) (info->stream, "$ac%ld",
943     (l >> OP_SH_DSPACC_S) & OP_MASK_DSPACC_S);
944     break;
945    
946     case '0': /* dsp 6-bit signed immediate in bit 20 */
947     delta = ((l >> OP_SH_DSPSFT) & OP_MASK_DSPSFT);
948     if (delta & 0x20) /* test sign bit */
949     delta |= ~OP_MASK_DSPSFT;
950     (*info->fprintf_func) (info->stream, "%d", delta);
951     break;
952    
953     case ':': /* dsp 7-bit signed immediate in bit 19 */
954     delta = ((l >> OP_SH_DSPSFT_7) & OP_MASK_DSPSFT_7);
955     if (delta & 0x40) /* test sign bit */
956     delta |= ~OP_MASK_DSPSFT_7;
957     (*info->fprintf_func) (info->stream, "%d", delta);
958     break;
959    
960     case '\'':
961     (*info->fprintf_func) (info->stream, "0x%lx",
962     (l >> OP_SH_RDDSP) & OP_MASK_RDDSP);
963     break;
964    
965     case '@': /* dsp 10-bit signed immediate in bit 16 */
966     delta = ((l >> OP_SH_IMM10) & OP_MASK_IMM10);
967     if (delta & 0x200) /* test sign bit */
968     delta |= ~OP_MASK_IMM10;
969     (*info->fprintf_func) (info->stream, "%d", delta);
970     break;
971    
972     case '!':
973     (*info->fprintf_func) (info->stream, "%ld",
974     (l >> OP_SH_MT_U) & OP_MASK_MT_U);
975     break;
976    
977     case '$':
978     (*info->fprintf_func) (info->stream, "%ld",
979     (l >> OP_SH_MT_H) & OP_MASK_MT_H);
980     break;
981    
982     case '*':
983     (*info->fprintf_func) (info->stream, "$ac%ld",
984     (l >> OP_SH_MTACC_T) & OP_MASK_MTACC_T);
985     break;
986    
987     case '&':
988     (*info->fprintf_func) (info->stream, "$ac%ld",
989     (l >> OP_SH_MTACC_D) & OP_MASK_MTACC_D);
990     break;
991    
992     case 'g':
993     /* Coprocessor register for CTTC1, MTTC2, MTHC2, CTTC2. */
994     (*info->fprintf_func) (info->stream, "$%ld",
995     (l >> OP_SH_RD) & OP_MASK_RD);
996     break;
997    
998     case 's':
999     case 'b':
1000     case 'r':
1001     case 'v':
1002     (*info->fprintf_func) (info->stream, "%s",
1003     mips_gpr_names[(l >> OP_SH_RS) & OP_MASK_RS]);
1004     break;
1005    
1006     case 't':
1007     case 'w':
1008     (*info->fprintf_func) (info->stream, "%s",
1009     mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
1010     break;
1011    
1012     case 'i':
1013     case 'u':
1014     (*info->fprintf_func) (info->stream, "0x%lx",
1015     (l >> OP_SH_IMMEDIATE) & OP_MASK_IMMEDIATE);
1016     break;
1017    
1018     case 'j': /* Same as i, but sign-extended. */
1019     case 'o':
1020     delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
1021     if (delta & 0x8000)
1022     delta |= ~0xffff;
1023     (*info->fprintf_func) (info->stream, "%d",
1024     delta);
1025     break;
1026    
1027     case 'h':
1028     (*info->fprintf_func) (info->stream, "0x%x",
1029     (unsigned int) ((l >> OP_SH_PREFX)
1030     & OP_MASK_PREFX));
1031     break;
1032    
1033     case 'k':
1034     (*info->fprintf_func) (info->stream, "0x%x",
1035     (unsigned int) ((l >> OP_SH_CACHE)
1036     & OP_MASK_CACHE));
1037     break;
1038    
1039     case 'a':
1040     info->target = (((pc + 4) & ~(bfd_vma) 0x0fffffff)
1041     | (((l >> OP_SH_TARGET) & OP_MASK_TARGET) << 2));
1042     /* For gdb disassembler, force odd address on jalx. */
1043     if (info->flavour == bfd_target_unknown_flavour
1044     && strcmp (opp->name, "jalx") == 0)
1045     info->target |= 1;
1046     (*info->print_address_func) (info->target, info);
1047     break;
1048    
1049     case 'p':
1050     /* Sign extend the displacement. */
1051     delta = (l >> OP_SH_DELTA) & OP_MASK_DELTA;
1052     if (delta & 0x8000)
1053     delta |= ~0xffff;
1054     info->target = (delta << 2) + pc + INSNLEN;
1055     (*info->print_address_func) (info->target, info);
1056     break;
1057    
1058     case 'd':
1059     (*info->fprintf_func) (info->stream, "%s",
1060     mips_gpr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
1061     break;
1062    
1063     case 'U':
1064     {
1065     /* First check for both rd and rt being equal. */
1066     unsigned int reg = (l >> OP_SH_RD) & OP_MASK_RD;
1067     if (reg == ((l >> OP_SH_RT) & OP_MASK_RT))
1068     (*info->fprintf_func) (info->stream, "%s",
1069     mips_gpr_names[reg]);
1070     else
1071     {
1072     /* If one is zero use the other. */
1073     if (reg == 0)
1074     (*info->fprintf_func) (info->stream, "%s",
1075     mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
1076     else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0)
1077     (*info->fprintf_func) (info->stream, "%s",
1078     mips_gpr_names[reg]);
1079     else /* Bogus, result depends on processor. */
1080     (*info->fprintf_func) (info->stream, "%s or %s",
1081     mips_gpr_names[reg],
1082     mips_gpr_names[(l >> OP_SH_RT) & OP_MASK_RT]);
1083     }
1084     }
1085     break;
1086    
1087     case 'z':
1088     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
1089     break;
1090    
1091     case '<':
1092     (*info->fprintf_func) (info->stream, "0x%lx",
1093     (l >> OP_SH_SHAMT) & OP_MASK_SHAMT);
1094     break;
1095    
1096     case 'c':
1097     (*info->fprintf_func) (info->stream, "0x%lx",
1098     (l >> OP_SH_CODE) & OP_MASK_CODE);
1099     break;
1100    
1101     case 'q':
1102     (*info->fprintf_func) (info->stream, "0x%lx",
1103     (l >> OP_SH_CODE2) & OP_MASK_CODE2);
1104     break;
1105    
1106     case 'C':
1107     (*info->fprintf_func) (info->stream, "0x%lx",
1108     (l >> OP_SH_COPZ) & OP_MASK_COPZ);
1109     break;
1110    
1111     case 'B':
1112     (*info->fprintf_func) (info->stream, "0x%lx",
1113    
1114     (l >> OP_SH_CODE20) & OP_MASK_CODE20);
1115     break;
1116    
1117     case 'J':
1118     (*info->fprintf_func) (info->stream, "0x%lx",
1119     (l >> OP_SH_CODE19) & OP_MASK_CODE19);
1120     break;
1121    
1122     case 'S':
1123     case 'V':
1124     (*info->fprintf_func) (info->stream, "%s",
1125     mips_fpr_names[(l >> OP_SH_FS) & OP_MASK_FS]);
1126     break;
1127    
1128     case 'T':
1129     case 'W':
1130     (*info->fprintf_func) (info->stream, "%s",
1131     mips_fpr_names[(l >> OP_SH_FT) & OP_MASK_FT]);
1132     break;
1133    
1134     case 'D':
1135     (*info->fprintf_func) (info->stream, "%s",
1136     mips_fpr_names[(l >> OP_SH_FD) & OP_MASK_FD]);
1137     break;
1138    
1139     case 'R':
1140     (*info->fprintf_func) (info->stream, "%s",
1141     mips_fpr_names[(l >> OP_SH_FR) & OP_MASK_FR]);
1142     break;
1143    
1144     case 'E':
1145     /* Coprocessor register for lwcN instructions, et al.
1146    
1147     Note that there is no load/store cp0 instructions, and
1148     that FPU (cp1) instructions disassemble this field using
1149     'T' format. Therefore, until we gain understanding of
1150     cp2 register names, we can simply print the register
1151     numbers. */
1152     (*info->fprintf_func) (info->stream, "$%ld",
1153     (l >> OP_SH_RT) & OP_MASK_RT);
1154     break;
1155    
1156     case 'G':
1157     /* Coprocessor register for mtcN instructions, et al. Note
1158     that FPU (cp1) instructions disassemble this field using
1159     'S' format. Therefore, we only need to worry about cp0,
1160     cp2, and cp3. */
1161     op = (l >> OP_SH_OP) & OP_MASK_OP;
1162     if (op == OP_OP_COP0)
1163     (*info->fprintf_func) (info->stream, "%s",
1164     mips_cp0_names[(l >> OP_SH_RD) & OP_MASK_RD]);
1165     else
1166     (*info->fprintf_func) (info->stream, "$%ld",
1167     (l >> OP_SH_RD) & OP_MASK_RD);
1168     break;
1169    
1170     case 'K':
1171     (*info->fprintf_func) (info->stream, "%s",
1172     mips_hwr_names[(l >> OP_SH_RD) & OP_MASK_RD]);
1173     break;
1174    
1175     case 'N':
1176     (*info->fprintf_func) (info->stream,
1177     ((opp->pinfo & (FP_D | FP_S)) != 0
1178     ? "$fcc%ld" : "$cc%ld"),
1179     (l >> OP_SH_BCC) & OP_MASK_BCC);
1180     break;
1181    
1182     case 'M':
1183     (*info->fprintf_func) (info->stream, "$fcc%ld",
1184     (l >> OP_SH_CCC) & OP_MASK_CCC);
1185     break;
1186    
1187     case 'P':
1188     (*info->fprintf_func) (info->stream, "%ld",
1189     (l >> OP_SH_PERFREG) & OP_MASK_PERFREG);
1190     break;
1191    
1192     case 'e':
1193     (*info->fprintf_func) (info->stream, "%ld",
1194     (l >> OP_SH_VECBYTE) & OP_MASK_VECBYTE);
1195     break;
1196    
1197     case '%':
1198     (*info->fprintf_func) (info->stream, "%ld",
1199     (l >> OP_SH_VECALIGN) & OP_MASK_VECALIGN);
1200     break;
1201    
1202     case 'H':
1203     (*info->fprintf_func) (info->stream, "%ld",
1204     (l >> OP_SH_SEL) & OP_MASK_SEL);
1205     break;
1206    
1207     case 'O':
1208     (*info->fprintf_func) (info->stream, "%ld",
1209     (l >> OP_SH_ALN) & OP_MASK_ALN);
1210     break;
1211    
1212     case 'Q':
1213     {
1214     unsigned int vsel = (l >> OP_SH_VSEL) & OP_MASK_VSEL;
1215    
1216     if ((vsel & 0x10) == 0)
1217     {
1218     int fmt;
1219    
1220     vsel &= 0x0f;
1221     for (fmt = 0; fmt < 3; fmt++, vsel >>= 1)
1222     if ((vsel & 1) == 0)
1223     break;
1224     (*info->fprintf_func) (info->stream, "$v%ld[%d]",
1225     (l >> OP_SH_FT) & OP_MASK_FT,
1226     vsel >> 1);
1227     }
1228     else if ((vsel & 0x08) == 0)
1229     {
1230     (*info->fprintf_func) (info->stream, "$v%ld",
1231     (l >> OP_SH_FT) & OP_MASK_FT);
1232     }
1233     else
1234     {
1235     (*info->fprintf_func) (info->stream, "0x%lx",
1236     (l >> OP_SH_FT) & OP_MASK_FT);
1237     }
1238     }
1239     break;
1240    
1241     case 'X':
1242     (*info->fprintf_func) (info->stream, "$v%ld",
1243     (l >> OP_SH_FD) & OP_MASK_FD);
1244     break;
1245    
1246     case 'Y':
1247     (*info->fprintf_func) (info->stream, "$v%ld",
1248     (l >> OP_SH_FS) & OP_MASK_FS);
1249     break;
1250    
1251     case 'Z':
1252     (*info->fprintf_func) (info->stream, "$v%ld",
1253     (l >> OP_SH_FT) & OP_MASK_FT);
1254     break;
1255    
1256     default:
1257     /* xgettext:c-format */
1258     (*info->fprintf_func) (info->stream,
1259     _("# internal error, undefined modifier(%c)"),
1260     *d);
1261     return;
1262     }
1263     }
1264     }
1265    
1266     /* Print the mips instruction at address MEMADDR in debugged memory,
1267     on using INFO. Returns length of the instruction, in bytes, which is
1268     always INSNLEN. BIGENDIAN must be 1 if this is big-endian code, 0 if
1269     this is little-endian code. */
1270    
1271     static int
1272     print_insn_mips (bfd_vma memaddr,
1273     unsigned long int word,
1274     struct disassemble_info *info)
1275     {
1276     const struct mips_opcode *op;
1277     static bfd_boolean init = 0;
1278     static const struct mips_opcode *mips_hash[OP_MASK_OP + 1];
1279    
1280     /* Build a hash table to shorten the search time. */
1281     if (! init)
1282     {
1283     unsigned int i;
1284    
1285     for (i = 0; i <= OP_MASK_OP; i++)
1286     {
1287     for (op = mips_opcodes; op < &mips_opcodes[NUMOPCODES]; op++)
1288     {
1289     if (op->pinfo == INSN_MACRO
1290     || (no_aliases && (op->pinfo2 & INSN2_ALIAS)))
1291     continue;
1292     if (i == ((op->match >> OP_SH_OP) & OP_MASK_OP))
1293     {
1294     mips_hash[i] = op;
1295     break;
1296     }
1297     }
1298     }
1299    
1300     init = 1;
1301     }
1302    
1303     info->bytes_per_chunk = INSNLEN;
1304     info->display_endian = info->endian;
1305     info->insn_info_valid = 1;
1306     info->branch_delay_insns = 0;
1307     info->data_size = 0;
1308     info->insn_type = dis_nonbranch;
1309     info->target = 0;
1310     info->target2 = 0;
1311    
1312     op = mips_hash[(word >> OP_SH_OP) & OP_MASK_OP];
1313     if (op != NULL)
1314     {
1315     for (; op < &mips_opcodes[NUMOPCODES]; op++)
1316     {
1317     if (op->pinfo != INSN_MACRO
1318     && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1319     && (word & op->mask) == op->match)
1320     {
1321     const char *d;
1322    
1323     /* We always allow to disassemble the jalx instruction. */
1324     if (! OPCODE_IS_MEMBER (op, mips_isa, mips_processor)
1325     && strcmp (op->name, "jalx"))
1326     continue;
1327    
1328     /* Figure out instruction type and branch delay information. */
1329     if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
1330     {
1331     if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1332     info->insn_type = dis_jsr;
1333     else
1334     info->insn_type = dis_branch;
1335     info->branch_delay_insns = 1;
1336     }
1337     else if ((op->pinfo & (INSN_COND_BRANCH_DELAY
1338     | INSN_COND_BRANCH_LIKELY)) != 0)
1339     {
1340     if ((info->insn_type & INSN_WRITE_GPR_31) != 0)
1341     info->insn_type = dis_condjsr;
1342     else
1343     info->insn_type = dis_condbranch;
1344     info->branch_delay_insns = 1;
1345     }
1346     else if ((op->pinfo & (INSN_STORE_MEMORY
1347     | INSN_LOAD_MEMORY_DELAY)) != 0)
1348     info->insn_type = dis_dref;
1349    
1350     (*info->fprintf_func) (info->stream, "%s", op->name);
1351    
1352     d = op->args;
1353     if (d != NULL && *d != '\0')
1354     {
1355     (*info->fprintf_func) (info->stream, "\t");
1356     print_insn_args (d, word, memaddr, info, op);
1357     }
1358    
1359     return INSNLEN;
1360     }
1361     }
1362     }
1363    
1364     /* Handle undefined instructions. */
1365     info->insn_type = dis_noninsn;
1366     (*info->fprintf_func) (info->stream, "0x%lx", word);
1367     return INSNLEN;
1368     }
1369    
1370     /* Disassemble an operand for a mips16 instruction. */
1371    
1372     static void
1373     print_mips16_insn_arg (char type,
1374     const struct mips_opcode *op,
1375     int l,
1376     bfd_boolean use_extend,
1377     int extend,
1378     bfd_vma memaddr,
1379     struct disassemble_info *info)
1380     {
1381     switch (type)
1382     {
1383     case ',':
1384     case '(':
1385     case ')':
1386     (*info->fprintf_func) (info->stream, "%c", type);
1387     break;
1388    
1389     case 'y':
1390     case 'w':
1391     (*info->fprintf_func) (info->stream, "%s",
1392     mips16_reg_names(((l >> MIPS16OP_SH_RY)
1393     & MIPS16OP_MASK_RY)));
1394     break;
1395    
1396     case 'x':
1397     case 'v':
1398     (*info->fprintf_func) (info->stream, "%s",
1399     mips16_reg_names(((l >> MIPS16OP_SH_RX)
1400     & MIPS16OP_MASK_RX)));
1401     break;
1402    
1403     case 'z':
1404     (*info->fprintf_func) (info->stream, "%s",
1405     mips16_reg_names(((l >> MIPS16OP_SH_RZ)
1406     & MIPS16OP_MASK_RZ)));
1407     break;
1408    
1409     case 'Z':
1410     (*info->fprintf_func) (info->stream, "%s",
1411     mips16_reg_names(((l >> MIPS16OP_SH_MOVE32Z)
1412     & MIPS16OP_MASK_MOVE32Z)));
1413     break;
1414    
1415     case '0':
1416     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[0]);
1417     break;
1418    
1419     case 'S':
1420     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[29]);
1421     break;
1422    
1423     case 'P':
1424     (*info->fprintf_func) (info->stream, "$pc");
1425     break;
1426    
1427     case 'R':
1428     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[31]);
1429     break;
1430    
1431     case 'X':
1432     (*info->fprintf_func) (info->stream, "%s",
1433     mips_gpr_names[((l >> MIPS16OP_SH_REGR32)
1434     & MIPS16OP_MASK_REGR32)]);
1435     break;
1436    
1437     case 'Y':
1438     (*info->fprintf_func) (info->stream, "%s",
1439     mips_gpr_names[MIPS16OP_EXTRACT_REG32R (l)]);
1440     break;
1441    
1442     case '<':
1443     case '>':
1444     case '[':
1445     case ']':
1446     case '4':
1447     case '5':
1448     case 'H':
1449     case 'W':
1450     case 'D':
1451     case 'j':
1452     case '6':
1453     case '8':
1454     case 'V':
1455     case 'C':
1456     case 'U':
1457     case 'k':
1458     case 'K':
1459     case 'p':
1460     case 'q':
1461     case 'A':
1462     case 'B':
1463     case 'E':
1464     {
1465     int immed, nbits, shift, signedp, extbits, pcrel, extu, branch;
1466    
1467     shift = 0;
1468     signedp = 0;
1469     extbits = 16;
1470     pcrel = 0;
1471     extu = 0;
1472     branch = 0;
1473     switch (type)
1474     {
1475     case '<':
1476     nbits = 3;
1477     immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1478     extbits = 5;
1479     extu = 1;
1480     break;
1481     case '>':
1482     nbits = 3;
1483     immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1484     extbits = 5;
1485     extu = 1;
1486     break;
1487     case '[':
1488     nbits = 3;
1489     immed = (l >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ;
1490     extbits = 6;
1491     extu = 1;
1492     break;
1493     case ']':
1494     nbits = 3;
1495     immed = (l >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX;
1496     extbits = 6;
1497     extu = 1;
1498     break;
1499     case '4':
1500     nbits = 4;
1501     immed = (l >> MIPS16OP_SH_IMM4) & MIPS16OP_MASK_IMM4;
1502     signedp = 1;
1503     extbits = 15;
1504     break;
1505     case '5':
1506     nbits = 5;
1507     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1508     info->insn_type = dis_dref;
1509     info->data_size = 1;
1510     break;
1511     case 'H':
1512     nbits = 5;
1513     shift = 1;
1514     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1515     info->insn_type = dis_dref;
1516     info->data_size = 2;
1517     break;
1518     case 'W':
1519     nbits = 5;
1520     shift = 2;
1521     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1522     if ((op->pinfo & MIPS16_INSN_READ_PC) == 0
1523     && (op->pinfo & MIPS16_INSN_READ_SP) == 0)
1524     {
1525     info->insn_type = dis_dref;
1526     info->data_size = 4;
1527     }
1528     break;
1529     case 'D':
1530     nbits = 5;
1531     shift = 3;
1532     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1533     info->insn_type = dis_dref;
1534     info->data_size = 8;
1535     break;
1536     case 'j':
1537     nbits = 5;
1538     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1539     signedp = 1;
1540     break;
1541     case '6':
1542     nbits = 6;
1543     immed = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1544     break;
1545     case '8':
1546     nbits = 8;
1547     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1548     break;
1549     case 'V':
1550     nbits = 8;
1551     shift = 2;
1552     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1553     /* FIXME: This might be lw, or it might be addiu to $sp or
1554     $pc. We assume it's load. */
1555     info->insn_type = dis_dref;
1556     info->data_size = 4;
1557     break;
1558     case 'C':
1559     nbits = 8;
1560     shift = 3;
1561     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1562     info->insn_type = dis_dref;
1563     info->data_size = 8;
1564     break;
1565     case 'U':
1566     nbits = 8;
1567     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1568     extu = 1;
1569     break;
1570     case 'k':
1571     nbits = 8;
1572     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1573     signedp = 1;
1574     break;
1575     case 'K':
1576     nbits = 8;
1577     shift = 3;
1578     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1579     signedp = 1;
1580     break;
1581     case 'p':
1582     nbits = 8;
1583     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1584     signedp = 1;
1585     pcrel = 1;
1586     branch = 1;
1587     info->insn_type = dis_condbranch;
1588     break;
1589     case 'q':
1590     nbits = 11;
1591     immed = (l >> MIPS16OP_SH_IMM11) & MIPS16OP_MASK_IMM11;
1592     signedp = 1;
1593     pcrel = 1;
1594     branch = 1;
1595     info->insn_type = dis_branch;
1596     break;
1597     case 'A':
1598     nbits = 8;
1599     shift = 2;
1600     immed = (l >> MIPS16OP_SH_IMM8) & MIPS16OP_MASK_IMM8;
1601     pcrel = 1;
1602     /* FIXME: This can be lw or la. We assume it is lw. */
1603     info->insn_type = dis_dref;
1604     info->data_size = 4;
1605     break;
1606     case 'B':
1607     nbits = 5;
1608     shift = 3;
1609     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1610     pcrel = 1;
1611     info->insn_type = dis_dref;
1612     info->data_size = 8;
1613     break;
1614     case 'E':
1615     nbits = 5;
1616     shift = 2;
1617     immed = (l >> MIPS16OP_SH_IMM5) & MIPS16OP_MASK_IMM5;
1618     pcrel = 1;
1619     break;
1620     default:
1621     abort ();
1622     }
1623    
1624     if (! use_extend)
1625     {
1626     if (signedp && immed >= (1 << (nbits - 1)))
1627     immed -= 1 << nbits;
1628     immed <<= shift;
1629     if ((type == '<' || type == '>' || type == '[' || type == ']')
1630     && immed == 0)
1631     immed = 8;
1632     }
1633     else
1634     {
1635     if (extbits == 16)
1636     immed |= ((extend & 0x1f) << 11) | (extend & 0x7e0);
1637     else if (extbits == 15)
1638     immed |= ((extend & 0xf) << 11) | (extend & 0x7f0);
1639     else
1640     immed = ((extend >> 6) & 0x1f) | (extend & 0x20);
1641     immed &= (1 << extbits) - 1;
1642     if (! extu && immed >= (1 << (extbits - 1)))
1643     immed -= 1 << extbits;
1644     }
1645    
1646     if (! pcrel)
1647     (*info->fprintf_func) (info->stream, "%d", immed);
1648     else
1649     {
1650     bfd_vma baseaddr;
1651    
1652     if (branch)
1653     {
1654     immed *= 2;
1655     baseaddr = memaddr + 2;
1656     }
1657     else if (use_extend)
1658     baseaddr = memaddr - 2;
1659     else
1660     {
1661     int status;
1662     bfd_byte buffer[2];
1663    
1664     baseaddr = memaddr;
1665    
1666     /* If this instruction is in the delay slot of a jr
1667     instruction, the base address is the address of the
1668     jr instruction. If it is in the delay slot of jalr
1669     instruction, the base address is the address of the
1670     jalr instruction. This test is unreliable: we have
1671     no way of knowing whether the previous word is
1672     instruction or data. */
1673     status = (*info->read_memory_func) (memaddr - 4, buffer, 2,
1674     info);
1675     if (status == 0
1676     && (((info->endian == BFD_ENDIAN_BIG
1677     ? bfd_getb16 (buffer)
1678     : bfd_getl16 (buffer))
1679     & 0xf800) == 0x1800))
1680     baseaddr = memaddr - 4;
1681     else
1682     {
1683     status = (*info->read_memory_func) (memaddr - 2, buffer,
1684     2, info);
1685     if (status == 0
1686     && (((info->endian == BFD_ENDIAN_BIG
1687     ? bfd_getb16 (buffer)
1688     : bfd_getl16 (buffer))
1689     & 0xf81f) == 0xe800))
1690     baseaddr = memaddr - 2;
1691     }
1692     }
1693     info->target = (baseaddr & ~((1 << shift) - 1)) + immed;
1694     if (pcrel && branch
1695     && info->flavour == bfd_target_unknown_flavour)
1696     /* For gdb disassembler, maintain odd address. */
1697     info->target |= 1;
1698     (*info->print_address_func) (info->target, info);
1699     }
1700     }
1701     break;
1702    
1703     case 'a':
1704     {
1705     int jalx = l & 0x400;
1706    
1707     if (! use_extend)
1708     extend = 0;
1709     l = ((l & 0x1f) << 23) | ((l & 0x3e0) << 13) | (extend << 2);
1710     if (!jalx && info->flavour == bfd_target_unknown_flavour)
1711     /* For gdb disassembler, maintain odd address. */
1712     l |= 1;
1713     }
1714     info->target = ((memaddr + 4) & ~(bfd_vma) 0x0fffffff) | l;
1715     (*info->print_address_func) (info->target, info);
1716     info->insn_type = dis_jsr;
1717     info->branch_delay_insns = 1;
1718     break;
1719    
1720     case 'l':
1721     case 'L':
1722     {
1723     int need_comma, amask, smask;
1724    
1725     need_comma = 0;
1726    
1727     l = (l >> MIPS16OP_SH_IMM6) & MIPS16OP_MASK_IMM6;
1728    
1729     amask = (l >> 3) & 7;
1730    
1731     if (amask > 0 && amask < 5)
1732     {
1733     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[4]);
1734     if (amask > 1)
1735     (*info->fprintf_func) (info->stream, "-%s",
1736     mips_gpr_names[amask + 3]);
1737     need_comma = 1;
1738     }
1739    
1740     smask = (l >> 1) & 3;
1741     if (smask == 3)
1742     {
1743     (*info->fprintf_func) (info->stream, "%s??",
1744     need_comma ? "," : "");
1745     need_comma = 1;
1746     }
1747     else if (smask > 0)
1748     {
1749     (*info->fprintf_func) (info->stream, "%s%s",
1750     need_comma ? "," : "",
1751     mips_gpr_names[16]);
1752     if (smask > 1)
1753     (*info->fprintf_func) (info->stream, "-%s",
1754     mips_gpr_names[smask + 15]);
1755     need_comma = 1;
1756     }
1757    
1758     if (l & 1)
1759     {
1760     (*info->fprintf_func) (info->stream, "%s%s",
1761     need_comma ? "," : "",
1762     mips_gpr_names[31]);
1763     need_comma = 1;
1764     }
1765    
1766     if (amask == 5 || amask == 6)
1767     {
1768     (*info->fprintf_func) (info->stream, "%s$f0",
1769     need_comma ? "," : "");
1770     if (amask == 6)
1771     (*info->fprintf_func) (info->stream, "-$f1");
1772     }
1773     }
1774     break;
1775    
1776     case 'm':
1777     case 'M':
1778     /* MIPS16e save/restore. */
1779     {
1780     int need_comma = 0;
1781     int amask, args, statics;
1782     int nsreg, smask;
1783     int framesz;
1784     int i, j;
1785    
1786     l = l & 0x7f;
1787     if (use_extend)
1788     l |= extend << 16;
1789    
1790     amask = (l >> 16) & 0xf;
1791     if (amask == MIPS16_ALL_ARGS)
1792     {
1793     args = 4;
1794     statics = 0;
1795     }
1796     else if (amask == MIPS16_ALL_STATICS)
1797     {
1798     args = 0;
1799     statics = 4;
1800     }
1801     else
1802     {
1803     args = amask >> 2;
1804     statics = amask & 3;
1805     }
1806    
1807     if (args > 0) {
1808     (*info->fprintf_func) (info->stream, "%s", mips_gpr_names[4]);
1809     if (args > 1)
1810     (*info->fprintf_func) (info->stream, "-%s",
1811     mips_gpr_names[4 + args - 1]);
1812     need_comma = 1;
1813     }
1814    
1815     framesz = (((l >> 16) & 0xf0) | (l & 0x0f)) * 8;
1816     if (framesz == 0 && !use_extend)
1817     framesz = 128;
1818    
1819     (*info->fprintf_func) (info->stream, "%s%d",
1820     need_comma ? "," : "",
1821     framesz);
1822    
1823     if (l & 0x40) /* $ra */
1824     (*info->fprintf_func) (info->stream, ",%s", mips_gpr_names[31]);
1825    
1826     nsreg = (l >> 24) & 0x7;
1827     smask = 0;
1828     if (l & 0x20) /* $s0 */
1829     smask |= 1 << 0;
1830     if (l & 0x10) /* $s1 */
1831     smask |= 1 << 1;
1832     if (nsreg > 0) /* $s2-$s8 */
1833     smask |= ((1 << nsreg) - 1) << 2;
1834    
1835     /* Find first set static reg bit. */
1836     for (i = 0; i < 9; i++)
1837     {
1838     if (smask & (1 << i))
1839     {
1840     (*info->fprintf_func) (info->stream, ",%s",
1841     mips_gpr_names[i == 8 ? 30 : (16 + i)]);
1842     /* Skip over string of set bits. */
1843     for (j = i; smask & (2 << j); j++)
1844     continue;
1845     if (j > i)
1846     (*info->fprintf_func) (info->stream, "-%s",
1847     mips_gpr_names[j == 8 ? 30 : (16 + j)]);
1848     i = j + 1;
1849     }
1850     }
1851    
1852     /* Statics $ax - $a3. */
1853     if (statics == 1)
1854     (*info->fprintf_func) (info->stream, ",%s", mips_gpr_names[7]);
1855     else if (statics > 0)
1856     (*info->fprintf_func) (info->stream, ",%s-%s",
1857     mips_gpr_names[7 - statics + 1],
1858     mips_gpr_names[7]);
1859     }
1860     break;
1861    
1862     default:
1863     /* xgettext:c-format */
1864     (*info->fprintf_func)
1865     (info->stream,
1866     _("# internal disassembler error, unrecognised modifier (%c)"),
1867     type);
1868     abort ();
1869     }
1870     }
1871    
1872     /* Disassemble mips16 instructions. */
1873    
1874     static int
1875     print_insn_mips16 (bfd_vma memaddr, struct disassemble_info *info)
1876     {
1877     int status;
1878     bfd_byte buffer[2];
1879     int length;
1880     int insn;
1881     bfd_boolean use_extend;
1882     int extend = 0;
1883     const struct mips_opcode *op, *opend;
1884    
1885     info->bytes_per_chunk = 2;
1886     info->display_endian = info->endian;
1887     info->insn_info_valid = 1;
1888     info->branch_delay_insns = 0;
1889     info->data_size = 0;
1890     info->insn_type = dis_nonbranch;
1891     info->target = 0;
1892     info->target2 = 0;
1893    
1894     status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1895     if (status != 0)
1896     {
1897     (*info->memory_error_func) (status, memaddr, info);
1898     return -1;
1899     }
1900    
1901     length = 2;
1902    
1903     if (info->endian == BFD_ENDIAN_BIG)
1904     insn = bfd_getb16 (buffer);
1905     else
1906     insn = bfd_getl16 (buffer);
1907    
1908     /* Handle the extend opcode specially. */
1909     use_extend = FALSE;
1910     if ((insn & 0xf800) == 0xf000)
1911     {
1912     use_extend = TRUE;
1913     extend = insn & 0x7ff;
1914    
1915     memaddr += 2;
1916    
1917     status = (*info->read_memory_func) (memaddr, buffer, 2, info);
1918     if (status != 0)
1919     {
1920     (*info->fprintf_func) (info->stream, "extend 0x%x",
1921     (unsigned int) extend);
1922     (*info->memory_error_func) (status, memaddr, info);
1923     return -1;
1924     }
1925    
1926     if (info->endian == BFD_ENDIAN_BIG)
1927     insn = bfd_getb16 (buffer);
1928     else
1929     insn = bfd_getl16 (buffer);
1930    
1931     /* Check for an extend opcode followed by an extend opcode. */
1932     if ((insn & 0xf800) == 0xf000)
1933     {
1934     (*info->fprintf_func) (info->stream, "extend 0x%x",
1935     (unsigned int) extend);
1936     info->insn_type = dis_noninsn;
1937     return length;
1938     }
1939    
1940     length += 2;
1941     }
1942    
1943     /* FIXME: Should probably use a hash table on the major opcode here. */
1944    
1945     opend = mips16_opcodes + bfd_mips16_num_opcodes;
1946     for (op = mips16_opcodes; op < opend; op++)
1947     {
1948     if (op->pinfo != INSN_MACRO
1949     && !(no_aliases && (op->pinfo2 & INSN2_ALIAS))
1950     && (insn & op->mask) == op->match)
1951     {
1952     const char *s;
1953    
1954     if (strchr (op->args, 'a') != NULL)
1955     {
1956     if (use_extend)
1957     {
1958     (*info->fprintf_func) (info->stream, "extend 0x%x",
1959     (unsigned int) extend);
1960     info->insn_type = dis_noninsn;
1961     return length - 2;
1962     }
1963    
1964     use_extend = FALSE;
1965    
1966     memaddr += 2;
1967    
1968     status = (*info->read_memory_func) (memaddr, buffer, 2,
1969     info);
1970     if (status == 0)
1971     {
1972     use_extend = TRUE;
1973     if (info->endian == BFD_ENDIAN_BIG)
1974     extend = bfd_getb16 (buffer);
1975     else
1976     extend = bfd_getl16 (buffer);
1977     length += 2;
1978     }
1979     }
1980    
1981     (*info->fprintf_func) (info->stream, "%s", op->name);
1982     if (op->args[0] != '\0')
1983     (*info->fprintf_func) (info->stream, "\t");
1984    
1985     for (s = op->args; *s != '\0'; s++)
1986     {
1987     if (*s == ','
1988     && s[1] == 'w'
1989     && (((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)
1990     == ((insn >> MIPS16OP_SH_RY) & MIPS16OP_MASK_RY)))
1991     {
1992     /* Skip the register and the comma. */
1993     ++s;
1994     continue;
1995     }
1996     if (*s == ','
1997     && s[1] == 'v'
1998     && (((insn >> MIPS16OP_SH_RZ) & MIPS16OP_MASK_RZ)
1999     == ((insn >> MIPS16OP_SH_RX) & MIPS16OP_MASK_RX)))
2000     {
2001     /* Skip the register and the comma. */
2002     ++s;
2003     continue;
2004     }
2005     print_mips16_insn_arg (*s, op, insn, use_extend, extend, memaddr,
2006     info);
2007     }
2008    
2009     if ((op->pinfo & INSN_UNCOND_BRANCH_DELAY) != 0)
2010     {
2011     info->branch_delay_insns = 1;
2012     if (info->insn_type != dis_jsr)
2013     info->insn_type = dis_branch;
2014     }
2015    
2016     return length;
2017     }
2018     }
2019    
2020     if (use_extend)
2021     (*info->fprintf_func) (info->stream, "0x%x", extend | 0xf000);
2022     (*info->fprintf_func) (info->stream, "0x%x", insn);
2023     info->insn_type = dis_noninsn;
2024    
2025     return length;
2026     }
2027    
2028     /* In an environment where we do not know the symbol type of the
2029     instruction we are forced to assume that the low order bit of the
2030     instructions' address may mark it as a mips16 instruction. If we
2031     are single stepping, or the pc is within the disassembled function,
2032     this works. Otherwise, we need a clue. Sometimes. */
2033    
2034     static int
2035     _print_insn_mips (bfd_vma memaddr,
2036     struct disassemble_info *info,
2037     enum bfd_endian endianness)
2038     {
2039     bfd_byte buffer[INSNLEN];
2040     int status;
2041    
2042     set_default_mips_dis_options (info);
2043     parse_mips_dis_options (info->disassembler_options);
2044    
2045     #if 1
2046     /* FIXME: If odd address, this is CLEARLY a mips 16 instruction. */
2047     /* Only a few tools will work this way. */
2048     if (memaddr & 0x01)
2049     return print_insn_mips16 (memaddr, info);
2050     #endif
2051    
2052     #if SYMTAB_AVAILABLE
2053     if (info->mach == bfd_mach_mips16
2054     || (info->flavour == bfd_target_elf_flavour
2055     && info->symbols != NULL
2056     && ((*(elf_symbol_type **) info->symbols)->internal_elf_sym.st_other
2057     == STO_MIPS16)))
2058     return print_insn_mips16 (memaddr, info);
2059     #endif
2060    
2061     status = (*info->read_memory_func) (memaddr, buffer, INSNLEN, info);
2062     if (status == 0)
2063     {
2064     unsigned long insn;
2065    
2066     if (endianness == BFD_ENDIAN_BIG)
2067     insn = (unsigned long) bfd_getb32 (buffer);
2068     else
2069     insn = (unsigned long) bfd_getl32 (buffer);
2070    
2071     return print_insn_mips (memaddr, insn, info);
2072     }
2073     else
2074     {
2075     (*info->memory_error_func) (status, memaddr, info);
2076     return -1;
2077     }
2078     }
2079    
2080     int
2081     print_insn_big_mips (bfd_vma memaddr, struct disassemble_info *info)
2082     {
2083     return _print_insn_mips (memaddr, info, BFD_ENDIAN_BIG);
2084     }
2085    
2086     int
2087     print_insn_little_mips (bfd_vma memaddr, struct disassemble_info *info)
2088     {
2089     return _print_insn_mips (memaddr, info, BFD_ENDIAN_LITTLE);
2090     }
2091    
2092     void
2093     print_mips_disassembler_options (FILE *stream)
2094     {
2095     unsigned int i;
2096    
2097     fprintf (stream, _("\n\
2098     The following MIPS specific disassembler options are supported for use\n\
2099     with the -M switch (multiple options should be separated by commas):\n"));
2100    
2101     fprintf (stream, _("\n\
2102     gpr-names=ABI Print GPR names according to specified ABI.\n\
2103     Default: based on binary being disassembled.\n"));
2104    
2105     fprintf (stream, _("\n\
2106     fpr-names=ABI Print FPR names according to specified ABI.\n\
2107     Default: numeric.\n"));
2108    
2109     fprintf (stream, _("\n\
2110     cp0-names=ARCH Print CP0 register names according to\n\
2111     specified architecture.\n\
2112     Default: based on binary being disassembled.\n"));
2113    
2114     fprintf (stream, _("\n\
2115     hwr-names=ARCH Print HWR names according to specified \n\
2116     architecture.\n\
2117     Default: based on binary being disassembled.\n"));
2118    
2119     fprintf (stream, _("\n\
2120     reg-names=ABI Print GPR and FPR names according to\n\
2121     specified ABI.\n"));
2122    
2123     fprintf (stream, _("\n\
2124     reg-names=ARCH Print CP0 register and HWR names according to\n\
2125     specified architecture.\n"));
2126    
2127     fprintf (stream, _("\n\
2128     For the options above, the following values are supported for \"ABI\":\n\
2129     "));
2130     for (i = 0; i < ARRAY_SIZE (mips_abi_choices); i++)
2131     fprintf (stream, " %s", mips_abi_choices[i].name);
2132     fprintf (stream, _("\n"));
2133    
2134     fprintf (stream, _("\n\
2135     For the options above, The following values are supported for \"ARCH\":\n\
2136     "));
2137     for (i = 0; i < ARRAY_SIZE (mips_arch_choices); i++)
2138     if (*mips_arch_choices[i].name != '\0')
2139     fprintf (stream, " %s", mips_arch_choices[i].name);
2140     fprintf (stream, _("\n"));
2141    
2142     fprintf (stream, _("\n"));
2143     }