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[deliverable/binutils-gdb.git] / opcodes / ppc-dis.c
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1/* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support
4
5 This file is part of the GNU opcodes library.
6
7 This library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING. If not, write to the
19 Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22#include "sysdep.h"
23#include <stdio.h>
24#include "disassemble.h"
25#include "elf-bfd.h"
26#include "elf/ppc.h"
27#include "opintl.h"
28#include "opcode/ppc.h"
29#include "libiberty.h"
30
31/* This file provides several disassembler functions, all of which use
32 the disassembler interface defined in dis-asm.h. Several functions
33 are provided because this file handles disassembly for the PowerPC
34 in both big and little endian mode and also for the POWER (RS/6000)
35 chip. */
36static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int,
37 ppc_cpu_t);
38
39struct dis_private
40{
41 /* Stash the result of parsing disassembler_options here. */
42 ppc_cpu_t dialect;
43} private;
44
45#define POWERPC_DIALECT(INFO) \
46 (((struct dis_private *) ((INFO)->private_data))->dialect)
47
48struct ppc_mopt {
49 /* Option string, without -m or -M prefix. */
50 const char *opt;
51 /* CPU option flags. */
52 ppc_cpu_t cpu;
53 /* Flags that should stay on, even when combined with another cpu
54 option. This should only be used for generic options like
55 "-many" or "-maltivec" where it is reasonable to add some
56 capability to another cpu selection. The added flags are sticky
57 so that, for example, "-many -me500" and "-me500 -many" result in
58 the same assembler or disassembler behaviour. Do not use
59 "sticky" for specific cpus, as this will prevent that cpu's flags
60 from overriding the defaults set in powerpc_init_dialect or a
61 prior -m option. */
62 ppc_cpu_t sticky;
63};
64
65struct ppc_mopt ppc_opts[] = {
66 { "403", PPC_OPCODE_PPC | PPC_OPCODE_403,
67 0 },
68 { "405", PPC_OPCODE_PPC | PPC_OPCODE_403 | PPC_OPCODE_405,
69 0 },
70 { "440", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_440
71 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
72 0 },
73 { "464", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_440
74 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI),
75 0 },
76 { "476", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_476
77 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5),
78 0 },
79 { "601", PPC_OPCODE_PPC | PPC_OPCODE_601,
80 0 },
81 { "603", PPC_OPCODE_PPC,
82 0 },
83 { "604", PPC_OPCODE_PPC,
84 0 },
85 { "620", PPC_OPCODE_PPC | PPC_OPCODE_64,
86 0 },
87 { "7400", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
88 0 },
89 { "7410", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
90 0 },
91 { "7450", PPC_OPCODE_PPC | PPC_OPCODE_7450 | PPC_OPCODE_ALTIVEC,
92 0 },
93 { "7455", PPC_OPCODE_PPC | PPC_OPCODE_ALTIVEC,
94 0 },
95 { "750cl", PPC_OPCODE_PPC | PPC_OPCODE_750 | PPC_OPCODE_PPCPS
96 , 0 },
97 { "821", PPC_OPCODE_PPC | PPC_OPCODE_860,
98 0 },
99 { "850", PPC_OPCODE_PPC | PPC_OPCODE_860,
100 0 },
101 { "860", PPC_OPCODE_PPC | PPC_OPCODE_860,
102 0 },
103 { "a2", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_POWER4
104 | PPC_OPCODE_POWER5 | PPC_OPCODE_CACHELCK | PPC_OPCODE_64
105 | PPC_OPCODE_A2),
106 0 },
107 { "altivec", PPC_OPCODE_PPC,
108 PPC_OPCODE_ALTIVEC },
109 { "any", PPC_OPCODE_PPC,
110 PPC_OPCODE_ANY },
111 { "booke", PPC_OPCODE_PPC | PPC_OPCODE_BOOKE,
112 0 },
113 { "booke32", PPC_OPCODE_PPC | PPC_OPCODE_BOOKE,
114 0 },
115 { "cell", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
116 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC),
117 0 },
118 { "com", PPC_OPCODE_COMMON,
119 0 },
120 { "e200z4", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE| PPC_OPCODE_SPE
121 | PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
122 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
123 | PPC_OPCODE_E500 | PPC_OPCODE_VLE | PPC_OPCODE_E200Z4
124 | PPC_OPCODE_EFS2 | PPC_OPCODE_LSP),
125 0 },
126 { "e300", PPC_OPCODE_PPC | PPC_OPCODE_E300,
127 0 },
128 { "e500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
129 | PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
130 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
131 | PPC_OPCODE_E500),
132 0 },
133 { "e500mc", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
134 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
135 | PPC_OPCODE_E500MC),
136 0 },
137 { "e500mc64", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
138 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
139 | PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_POWER5
140 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
141 0 },
142 { "e5500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
143 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
144 | PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
145 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
146 0 },
147 { "e6500", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL
148 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
149 | PPC_OPCODE_E500MC | PPC_OPCODE_64 | PPC_OPCODE_ALTIVEC
150 | PPC_OPCODE_E6500 | PPC_OPCODE_TMR | PPC_OPCODE_POWER4
151 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_POWER7),
152 0 },
153 { "e500x2", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_SPE
154 | PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
155 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
156 | PPC_OPCODE_E500),
157 0 },
158 { "efs", PPC_OPCODE_PPC | PPC_OPCODE_EFS,
159 0 },
160 { "efs2", PPC_OPCODE_PPC | PPC_OPCODE_EFS | PPC_OPCODE_EFS2,
161 0 },
162 { "power4", PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4,
163 0 },
164 { "power5", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
165 | PPC_OPCODE_POWER5),
166 0 },
167 { "power6", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
168 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC),
169 0 },
170 { "power7", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
171 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
172 | PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
173 0 },
174 { "power8", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
175 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
176 | PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8
177 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
178 0 },
179 { "power9", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
180 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
181 | PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
182 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
183 0 },
184 { "ppc", PPC_OPCODE_PPC,
185 0 },
186 { "ppc32", PPC_OPCODE_PPC,
187 0 },
188 { "32", PPC_OPCODE_PPC,
189 0 },
190 { "ppc64", PPC_OPCODE_PPC | PPC_OPCODE_64,
191 0 },
192 { "64", PPC_OPCODE_PPC | PPC_OPCODE_64,
193 0 },
194 { "ppc64bridge", PPC_OPCODE_PPC | PPC_OPCODE_64_BRIDGE,
195 0 },
196 { "ppcps", PPC_OPCODE_PPC | PPC_OPCODE_PPCPS,
197 0 },
198 { "pwr", PPC_OPCODE_POWER,
199 0 },
200 { "pwr2", PPC_OPCODE_POWER | PPC_OPCODE_POWER2,
201 0 },
202 { "pwr4", PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4,
203 0 },
204 { "pwr5", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
205 | PPC_OPCODE_POWER5),
206 0 },
207 { "pwr5x", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
208 | PPC_OPCODE_POWER5),
209 0 },
210 { "pwr6", (PPC_OPCODE_PPC | PPC_OPCODE_64 | PPC_OPCODE_POWER4
211 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC),
212 0 },
213 { "pwr7", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
214 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
215 | PPC_OPCODE_POWER7 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
216 0 },
217 { "pwr8", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
218 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
219 | PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8
220 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
221 0 },
222 { "pwr9", (PPC_OPCODE_PPC | PPC_OPCODE_ISEL | PPC_OPCODE_64
223 | PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6
224 | PPC_OPCODE_POWER7 | PPC_OPCODE_POWER8 | PPC_OPCODE_POWER9
225 | PPC_OPCODE_ALTIVEC | PPC_OPCODE_VSX),
226 0 },
227 { "pwrx", PPC_OPCODE_POWER | PPC_OPCODE_POWER2,
228 0 },
229 { "raw", PPC_OPCODE_PPC,
230 PPC_OPCODE_RAW },
231 { "spe", PPC_OPCODE_PPC | PPC_OPCODE_EFS,
232 PPC_OPCODE_SPE },
233 { "spe2", PPC_OPCODE_PPC | PPC_OPCODE_EFS | PPC_OPCODE_EFS2 | PPC_OPCODE_SPE,
234 PPC_OPCODE_SPE2 },
235 { "titan", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE | PPC_OPCODE_PMR
236 | PPC_OPCODE_RFMCI | PPC_OPCODE_TITAN),
237 0 },
238 { "vle", (PPC_OPCODE_PPC | PPC_OPCODE_BOOKE| PPC_OPCODE_SPE
239 | PPC_OPCODE_ISEL | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK
240 | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | PPC_OPCODE_RFMCI
241 | PPC_OPCODE_LSP | PPC_OPCODE_EFS2 | PPC_OPCODE_SPE2),
242 PPC_OPCODE_VLE },
243 { "vsx", PPC_OPCODE_PPC,
244 PPC_OPCODE_VSX },
245};
246
247/* Switch between Booke and VLE dialects for interlinked dumps. */
248static ppc_cpu_t
249get_powerpc_dialect (struct disassemble_info *info)
250{
251 ppc_cpu_t dialect = 0;
252
253 dialect = POWERPC_DIALECT (info);
254
255 /* Disassemble according to the section headers flags for VLE-mode. */
256 if (dialect & PPC_OPCODE_VLE
257 && info->section != NULL && info->section->owner != NULL
258 && bfd_get_flavour (info->section->owner) == bfd_target_elf_flavour
259 && elf_object_id (info->section->owner) == PPC32_ELF_DATA
260 && (elf_section_flags (info->section) & SHF_PPC_VLE) != 0)
261 return dialect;
262 else
263 return dialect & ~ PPC_OPCODE_VLE;
264}
265
266/* Handle -m and -M options that set cpu type, and .machine arg. */
267
268ppc_cpu_t
269ppc_parse_cpu (ppc_cpu_t ppc_cpu, ppc_cpu_t *sticky, const char *arg)
270{
271 unsigned int i;
272
273 for (i = 0; i < ARRAY_SIZE (ppc_opts); i++)
274 if (disassembler_options_cmp (ppc_opts[i].opt, arg) == 0)
275 {
276 if (ppc_opts[i].sticky)
277 {
278 *sticky |= ppc_opts[i].sticky;
279 if ((ppc_cpu & ~*sticky) != 0)
280 break;
281 }
282 ppc_cpu = ppc_opts[i].cpu;
283 break;
284 }
285 if (i >= ARRAY_SIZE (ppc_opts))
286 return 0;
287
288 ppc_cpu |= *sticky;
289 return ppc_cpu;
290}
291
292/* Determine which set of machines to disassemble for. */
293
294static void
295powerpc_init_dialect (struct disassemble_info *info)
296{
297 ppc_cpu_t dialect = 0;
298 ppc_cpu_t sticky = 0;
299 struct dis_private *priv = calloc (sizeof (*priv), 1);
300
301 if (priv == NULL)
302 priv = &private;
303
304 switch (info->mach)
305 {
306 case bfd_mach_ppc_403:
307 case bfd_mach_ppc_403gc:
308 dialect = ppc_parse_cpu (dialect, &sticky, "403");
309 break;
310 case bfd_mach_ppc_405:
311 dialect = ppc_parse_cpu (dialect, &sticky, "405");
312 break;
313 case bfd_mach_ppc_601:
314 dialect = ppc_parse_cpu (dialect, &sticky, "601");
315 break;
316 case bfd_mach_ppc_a35:
317 case bfd_mach_ppc_rs64ii:
318 case bfd_mach_ppc_rs64iii:
319 dialect = ppc_parse_cpu (dialect, &sticky, "pwr2") | PPC_OPCODE_64;
320 break;
321 case bfd_mach_ppc_e500:
322 dialect = ppc_parse_cpu (dialect, &sticky, "e500");
323 break;
324 case bfd_mach_ppc_e500mc:
325 dialect = ppc_parse_cpu (dialect, &sticky, "e500mc");
326 break;
327 case bfd_mach_ppc_e500mc64:
328 dialect = ppc_parse_cpu (dialect, &sticky, "e500mc64");
329 break;
330 case bfd_mach_ppc_e5500:
331 dialect = ppc_parse_cpu (dialect, &sticky, "e5500");
332 break;
333 case bfd_mach_ppc_e6500:
334 dialect = ppc_parse_cpu (dialect, &sticky, "e6500");
335 break;
336 case bfd_mach_ppc_titan:
337 dialect = ppc_parse_cpu (dialect, &sticky, "titan");
338 break;
339 case bfd_mach_ppc_vle:
340 dialect = ppc_parse_cpu (dialect, &sticky, "vle");
341 break;
342 default:
343 if (info->arch == bfd_arch_powerpc)
344 dialect = ppc_parse_cpu (dialect, &sticky, "power9") | PPC_OPCODE_ANY;
345 else
346 dialect = ppc_parse_cpu (dialect, &sticky, "pwr");
347 break;
348 }
349
350 const char *opt;
351 FOR_EACH_DISASSEMBLER_OPTION (opt, info->disassembler_options)
352 {
353 ppc_cpu_t new_cpu = 0;
354
355 if (disassembler_options_cmp (opt, "32") == 0)
356 dialect &= ~(ppc_cpu_t) PPC_OPCODE_64;
357 else if (disassembler_options_cmp (opt, "64") == 0)
358 dialect |= PPC_OPCODE_64;
359 else if ((new_cpu = ppc_parse_cpu (dialect, &sticky, opt)) != 0)
360 dialect = new_cpu;
361 else
362 /* xgettext: c-format */
363 opcodes_error_handler (_("warning: ignoring unknown -M%s option"), opt);
364 }
365
366 info->private_data = priv;
367 POWERPC_DIALECT(info) = dialect;
368}
369
370#define PPC_OPCD_SEGS 64
371static unsigned short powerpc_opcd_indices[PPC_OPCD_SEGS+1];
372#define VLE_OPCD_SEGS 32
373static unsigned short vle_opcd_indices[VLE_OPCD_SEGS+1];
374#define SPE2_OPCD_SEGS 13
375static unsigned short spe2_opcd_indices[SPE2_OPCD_SEGS+1];
376
377/* Calculate opcode table indices to speed up disassembly,
378 and init dialect. */
379
380void
381disassemble_init_powerpc (struct disassemble_info *info)
382{
383 if (powerpc_opcd_indices[PPC_OPCD_SEGS] == 0)
384 {
385 unsigned seg, idx, op;
386
387 /* PPC opcodes */
388 for (seg = 0, idx = 0; seg <= PPC_OPCD_SEGS; seg++)
389 {
390 powerpc_opcd_indices[seg] = idx;
391 for (; idx < powerpc_num_opcodes; idx++)
392 if (seg < PPC_OP (powerpc_opcodes[idx].opcode))
393 break;
394 }
395
396 /* VLE opcodes */
397 for (seg = 0, idx = 0; seg <= VLE_OPCD_SEGS; seg++)
398 {
399 vle_opcd_indices[seg] = idx;
400 for (; idx < vle_num_opcodes; idx++)
401 {
402 op = VLE_OP (vle_opcodes[idx].opcode, vle_opcodes[idx].mask);
403 if (seg < VLE_OP_TO_SEG (op))
404 break;
405 }
406 }
407
408 /* SPE2 opcodes */
409 for (seg = 0, idx = 0; seg <= SPE2_OPCD_SEGS; seg++)
410 {
411 spe2_opcd_indices[seg] = idx;
412 for (; idx < spe2_num_opcodes; idx++)
413 {
414 op = SPE2_XOP (spe2_opcodes[idx].opcode);
415 if (seg < SPE2_XOP_TO_SEG (op))
416 break;
417 }
418 }
419 }
420
421 powerpc_init_dialect (info);
422}
423
424/* Print a big endian PowerPC instruction. */
425
426int
427print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info)
428{
429 return print_insn_powerpc (memaddr, info, 1, get_powerpc_dialect (info));
430}
431
432/* Print a little endian PowerPC instruction. */
433
434int
435print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info)
436{
437 return print_insn_powerpc (memaddr, info, 0, get_powerpc_dialect (info));
438}
439
440/* Extract the operand value from the PowerPC or POWER instruction. */
441
442static int64_t
443operand_value_powerpc (const struct powerpc_operand *operand,
444 uint64_t insn, ppc_cpu_t dialect)
445{
446 int64_t value;
447 int invalid;
448 /* Extract the value from the instruction. */
449 if (operand->extract)
450 value = (*operand->extract) (insn, dialect, &invalid);
451 else
452 {
453 if (operand->shift >= 0)
454 value = (insn >> operand->shift) & operand->bitm;
455 else
456 value = (insn << -operand->shift) & operand->bitm;
457 if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
458 {
459 /* BITM is always some number of zeros followed by some
460 number of ones, followed by some number of zeros. */
461 uint64_t top = operand->bitm;
462 /* top & -top gives the rightmost 1 bit, so this
463 fills in any trailing zeros. */
464 top |= (top & -top) - 1;
465 top &= ~(top >> 1);
466 value = (value ^ top) - top;
467 }
468 }
469
470 return value;
471}
472
473/* Determine whether the optional operand(s) should be printed. */
474
475static int
476skip_optional_operands (const unsigned char *opindex,
477 uint64_t insn, ppc_cpu_t dialect)
478{
479 const struct powerpc_operand *operand;
480
481 for (; *opindex != 0; opindex++)
482 {
483 operand = &powerpc_operands[*opindex];
484 if ((operand->flags & PPC_OPERAND_NEXT) != 0
485 || ((operand->flags & PPC_OPERAND_OPTIONAL) != 0
486 && operand_value_powerpc (operand, insn, dialect) !=
487 ppc_optional_operand_value (operand)))
488 return 0;
489 }
490
491 return 1;
492}
493
494/* Find a match for INSN in the opcode table, given machine DIALECT. */
495
496static const struct powerpc_opcode *
497lookup_powerpc (uint64_t insn, ppc_cpu_t dialect)
498{
499 const struct powerpc_opcode *opcode, *opcode_end, *last;
500 unsigned long op;
501
502 /* Get the major opcode of the instruction. */
503 op = PPC_OP (insn);
504
505 /* Find the first match in the opcode table for this major opcode. */
506 opcode_end = powerpc_opcodes + powerpc_opcd_indices[op + 1];
507 last = NULL;
508 for (opcode = powerpc_opcodes + powerpc_opcd_indices[op];
509 opcode < opcode_end;
510 ++opcode)
511 {
512 const unsigned char *opindex;
513 const struct powerpc_operand *operand;
514 int invalid;
515
516 if ((insn & opcode->mask) != opcode->opcode
517 || ((dialect & PPC_OPCODE_ANY) == 0
518 && ((opcode->flags & dialect) == 0
519 || (opcode->deprecated & dialect) != 0)))
520 continue;
521
522 /* Check validity of operands. */
523 invalid = 0;
524 for (opindex = opcode->operands; *opindex != 0; opindex++)
525 {
526 operand = powerpc_operands + *opindex;
527 if (operand->extract)
528 (*operand->extract) (insn, dialect, &invalid);
529 }
530 if (invalid)
531 continue;
532
533 if ((dialect & PPC_OPCODE_RAW) == 0)
534 return opcode;
535
536 /* The raw machine insn is one that is not a specialization. */
537 if (last == NULL
538 || (last->mask & ~opcode->mask) != 0)
539 last = opcode;
540 }
541
542 return last;
543}
544
545/* Find a match for INSN in the VLE opcode table. */
546
547static const struct powerpc_opcode *
548lookup_vle (uint64_t insn)
549{
550 const struct powerpc_opcode *opcode;
551 const struct powerpc_opcode *opcode_end;
552 unsigned op, seg;
553
554 op = PPC_OP (insn);
555 if (op >= 0x20 && op <= 0x37)
556 {
557 /* This insn has a 4-bit opcode. */
558 op &= 0x3c;
559 }
560 seg = VLE_OP_TO_SEG (op);
561
562 /* Find the first match in the opcode table for this major opcode. */
563 opcode_end = vle_opcodes + vle_opcd_indices[seg + 1];
564 for (opcode = vle_opcodes + vle_opcd_indices[seg];
565 opcode < opcode_end;
566 ++opcode)
567 {
568 uint64_t table_opcd = opcode->opcode;
569 uint64_t table_mask = opcode->mask;
570 bfd_boolean table_op_is_short = PPC_OP_SE_VLE(table_mask);
571 uint64_t insn2;
572 const unsigned char *opindex;
573 const struct powerpc_operand *operand;
574 int invalid;
575
576 insn2 = insn;
577 if (table_op_is_short)
578 insn2 >>= 16;
579 if ((insn2 & table_mask) != table_opcd)
580 continue;
581
582 /* Check validity of operands. */
583 invalid = 0;
584 for (opindex = opcode->operands; *opindex != 0; ++opindex)
585 {
586 operand = powerpc_operands + *opindex;
587 if (operand->extract)
588 (*operand->extract) (insn, (ppc_cpu_t)0, &invalid);
589 }
590 if (invalid)
591 continue;
592
593 return opcode;
594 }
595
596 return NULL;
597}
598
599/* Find a match for INSN in the SPE2 opcode table. */
600
601static const struct powerpc_opcode *
602lookup_spe2 (uint64_t insn)
603{
604 const struct powerpc_opcode *opcode, *opcode_end;
605 unsigned op, xop, seg;
606
607 op = PPC_OP (insn);
608 if (op != 0x4)
609 {
610 /* This is not SPE2 insn.
611 * All SPE2 instructions have OP=4 and differs by XOP */
612 return NULL;
613 }
614 xop = SPE2_XOP (insn);
615 seg = SPE2_XOP_TO_SEG (xop);
616
617 /* Find the first match in the opcode table for this major opcode. */
618 opcode_end = spe2_opcodes + spe2_opcd_indices[seg + 1];
619 for (opcode = spe2_opcodes + spe2_opcd_indices[seg];
620 opcode < opcode_end;
621 ++opcode)
622 {
623 uint64_t table_opcd = opcode->opcode;
624 uint64_t table_mask = opcode->mask;
625 uint64_t insn2;
626 const unsigned char *opindex;
627 const struct powerpc_operand *operand;
628 int invalid;
629
630 insn2 = insn;
631 if ((insn2 & table_mask) != table_opcd)
632 continue;
633
634 /* Check validity of operands. */
635 invalid = 0;
636 for (opindex = opcode->operands; *opindex != 0; ++opindex)
637 {
638 operand = powerpc_operands + *opindex;
639 if (operand->extract)
640 (*operand->extract) (insn, (ppc_cpu_t)0, &invalid);
641 }
642 if (invalid)
643 continue;
644
645 return opcode;
646 }
647
648 return NULL;
649}
650
651/* Print a PowerPC or POWER instruction. */
652
653static int
654print_insn_powerpc (bfd_vma memaddr,
655 struct disassemble_info *info,
656 int bigendian,
657 ppc_cpu_t dialect)
658{
659 bfd_byte buffer[4];
660 int status;
661 uint64_t insn;
662 const struct powerpc_opcode *opcode;
663 int insn_length = 4; /* Assume we have a normal 4-byte instruction. */
664
665 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
666
667 /* The final instruction may be a 2-byte VLE insn. */
668 if (status != 0 && (dialect & PPC_OPCODE_VLE) != 0)
669 {
670 /* Clear buffer so unused bytes will not have garbage in them. */
671 buffer[0] = buffer[1] = buffer[2] = buffer[3] = 0;
672 status = (*info->read_memory_func) (memaddr, buffer, 2, info);
673 }
674
675 if (status != 0)
676 {
677 (*info->memory_error_func) (status, memaddr, info);
678 return -1;
679 }
680
681 if (bigendian)
682 insn = bfd_getb32 (buffer);
683 else
684 insn = bfd_getl32 (buffer);
685
686 /* Get the major opcode of the insn. */
687 opcode = NULL;
688 if ((dialect & PPC_OPCODE_VLE) != 0)
689 {
690 opcode = lookup_vle (insn);
691 if (opcode != NULL && PPC_OP_SE_VLE (opcode->mask))
692 {
693 /* The operands will be fetched out of the 16-bit instruction. */
694 insn >>= 16;
695 insn_length = 2;
696 }
697 }
698 if (opcode == NULL && (dialect & PPC_OPCODE_SPE2) != 0)
699 opcode = lookup_spe2 (insn);
700 if (opcode == NULL)
701 opcode = lookup_powerpc (insn, dialect & ~PPC_OPCODE_ANY);
702 if (opcode == NULL && (dialect & PPC_OPCODE_ANY) != 0)
703 opcode = lookup_powerpc (insn, dialect);
704
705 if (opcode != NULL)
706 {
707 const unsigned char *opindex;
708 const struct powerpc_operand *operand;
709 int need_comma;
710 int need_paren;
711 int skip_optional;
712
713 if (opcode->operands[0] != 0)
714 (*info->fprintf_func) (info->stream, "%-7s ", opcode->name);
715 else
716 (*info->fprintf_func) (info->stream, "%s", opcode->name);
717
718 /* Now extract and print the operands. */
719 need_comma = 0;
720 need_paren = 0;
721 skip_optional = -1;
722 for (opindex = opcode->operands; *opindex != 0; opindex++)
723 {
724 int64_t value;
725
726 operand = powerpc_operands + *opindex;
727
728 /* Operands that are marked FAKE are simply ignored. We
729 already made sure that the extract function considered
730 the instruction to be valid. */
731 if ((operand->flags & PPC_OPERAND_FAKE) != 0)
732 continue;
733
734 /* If all of the optional operands have the value zero,
735 then don't print any of them. */
736 if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0)
737 {
738 if (skip_optional < 0)
739 skip_optional = skip_optional_operands (opindex, insn,
740 dialect);
741 if (skip_optional)
742 continue;
743 }
744
745 value = operand_value_powerpc (operand, insn, dialect);
746
747 if (need_comma)
748 {
749 (*info->fprintf_func) (info->stream, ",");
750 need_comma = 0;
751 }
752
753 /* Print the operand as directed by the flags. */
754 if ((operand->flags & PPC_OPERAND_GPR) != 0
755 || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0))
756 (*info->fprintf_func) (info->stream, "r%" PPC_INT_FMT "d", value);
757 else if ((operand->flags & PPC_OPERAND_FPR) != 0)
758 (*info->fprintf_func) (info->stream, "f%" PPC_INT_FMT "d", value);
759 else if ((operand->flags & PPC_OPERAND_VR) != 0)
760 (*info->fprintf_func) (info->stream, "v%" PPC_INT_FMT "d", value);
761 else if ((operand->flags & PPC_OPERAND_VSR) != 0)
762 (*info->fprintf_func) (info->stream, "vs%" PPC_INT_FMT "d", value);
763 else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0)
764 (*info->print_address_func) (memaddr + value, info);
765 else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0)
766 (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
767 else if ((operand->flags & PPC_OPERAND_FSL) != 0)
768 (*info->fprintf_func) (info->stream, "fsl%" PPC_INT_FMT "d", value);
769 else if ((operand->flags & PPC_OPERAND_FCR) != 0)
770 (*info->fprintf_func) (info->stream, "fcr%" PPC_INT_FMT "d", value);
771 else if ((operand->flags & PPC_OPERAND_UDI) != 0)
772 (*info->fprintf_func) (info->stream, "%" PPC_INT_FMT "d", value);
773 else if ((operand->flags & PPC_OPERAND_CR_REG) != 0
774 && (((dialect & PPC_OPCODE_PPC) != 0)
775 || ((dialect & PPC_OPCODE_VLE) != 0)))
776 (*info->fprintf_func) (info->stream, "cr%" PPC_INT_FMT "d", value);
777 else if (((operand->flags & PPC_OPERAND_CR_BIT) != 0)
778 && (((dialect & PPC_OPCODE_PPC) != 0)
779 || ((dialect & PPC_OPCODE_VLE) != 0)))
780 {
781 static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
782 int cr;
783 int cc;
784
785 cr = value >> 2;
786 if (cr != 0)
787 (*info->fprintf_func) (info->stream, "4*cr%d+", cr);
788 cc = value & 3;
789 (*info->fprintf_func) (info->stream, "%s", cbnames[cc]);
790 }
791 else
792 (*info->fprintf_func) (info->stream, "%" PPC_INT_FMT "d", value);
793
794 if (need_paren)
795 {
796 (*info->fprintf_func) (info->stream, ")");
797 need_paren = 0;
798 }
799
800 if ((operand->flags & PPC_OPERAND_PARENS) == 0)
801 need_comma = 1;
802 else
803 {
804 (*info->fprintf_func) (info->stream, "(");
805 need_paren = 1;
806 }
807 }
808
809 /* We have found and printed an instruction. */
810 return insn_length;
811 }
812
813 /* We could not find a match. */
814 (*info->fprintf_func) (info->stream, ".long 0x%" PPC_INT_FMT "x", insn);
815
816 return 4;
817}
818
819const disasm_options_t *
820disassembler_options_powerpc (void)
821{
822 static disasm_options_t *opts = NULL;
823
824 if (opts == NULL)
825 {
826 size_t i, num_options = ARRAY_SIZE (ppc_opts);
827 opts = XNEW (disasm_options_t);
828 opts->name = XNEWVEC (const char *, num_options + 1);
829 for (i = 0; i < num_options; i++)
830 opts->name[i] = ppc_opts[i].opt;
831 /* The array we return must be NULL terminated. */
832 opts->name[i] = NULL;
833 opts->description = NULL;
834 }
835
836 return opts;
837}
838
839void
840print_ppc_disassembler_options (FILE *stream)
841{
842 unsigned int i, col;
843
844 fprintf (stream, _("\n\
845The following PPC specific disassembler options are supported for use with\n\
846the -M switch:\n"));
847
848 for (col = 0, i = 0; i < ARRAY_SIZE (ppc_opts); i++)
849 {
850 col += fprintf (stream, " %s,", ppc_opts[i].opt);
851 if (col > 66)
852 {
853 fprintf (stream, "\n");
854 col = 0;
855 }
856 }
857 fprintf (stream, "\n");
858}
GDB Binutils - Deliverables
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