Commit | Line | Data |
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252b5132 | 1 | /* ppc-dis.c -- Disassemble PowerPC instructions |
64a3a6fc | 2 | Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
8427c424 | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | Written by Ian Lance Taylor, Cygnus Support |
5 | ||
9b201bb5 NC |
6 | This file is part of the GNU opcodes library. |
7 | ||
8 | This library is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3, or (at your option) | |
11 | any later version. | |
12 | ||
13 | It is distributed in the hope that it will be useful, but WITHOUT | |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this file; see the file COPYING. If not, write to the | |
20 | Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
252b5132 RH |
22 | |
23 | #include <stdio.h> | |
252b5132 RH |
24 | #include "sysdep.h" |
25 | #include "dis-asm.h" | |
26 | #include "opcode/ppc.h" | |
27 | ||
28 | /* This file provides several disassembler functions, all of which use | |
29 | the disassembler interface defined in dis-asm.h. Several functions | |
30 | are provided because this file handles disassembly for the PowerPC | |
31 | in both big and little endian mode and also for the POWER (RS/6000) | |
32 | chip. */ | |
fa452fa6 PB |
33 | static int print_insn_powerpc (bfd_vma, struct disassemble_info *, int, |
34 | ppc_cpu_t); | |
252b5132 | 35 | |
fa452fa6 PB |
36 | struct dis_private |
37 | { | |
38 | /* Stash the result of parsing disassembler_options here. */ | |
39 | ppc_cpu_t dialect; | |
40 | }; | |
41 | ||
42 | #define POWERPC_DIALECT(INFO) \ | |
43 | (((struct dis_private *) ((INFO)->private_data))->dialect) | |
418c1742 MG |
44 | |
45 | /* Determine which set of machines to disassemble for. PPC403/601 or | |
9a0ccb24 MG |
46 | BookE. For convenience, also disassemble instructions supported |
47 | by the AltiVec vector unit. */ | |
418c1742 | 48 | |
661bd698 | 49 | static int |
fa452fa6 | 50 | powerpc_init_dialect (struct disassemble_info *info) |
418c1742 | 51 | { |
fa452fa6 PB |
52 | ppc_cpu_t dialect = PPC_OPCODE_PPC; |
53 | struct dis_private *priv = calloc (sizeof (*priv), 1); | |
54 | ||
55 | if (priv == NULL) | |
56 | return FALSE; | |
418c1742 | 57 | |
802a735e AM |
58 | if (BFD_DEFAULT_TARGET_SIZE == 64) |
59 | dialect |= PPC_OPCODE_64; | |
60 | ||
61 | if (info->disassembler_options | |
c3d65c1c BE |
62 | && strstr (info->disassembler_options, "ppcps") != NULL) |
63 | dialect |= PPC_OPCODE_PPCPS; | |
64 | else if (info->disassembler_options | |
661bd698 | 65 | && strstr (info->disassembler_options, "booke") != NULL) |
418c1742 | 66 | dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_BOOKE64; |
19a6653c AM |
67 | else if ((info->mach == bfd_mach_ppc_e500mc) |
68 | || (info->disassembler_options | |
69 | && strstr (info->disassembler_options, "e500mc") != NULL)) | |
70 | dialect |= (PPC_OPCODE_BOOKE | PPC_OPCODE_ISEL | |
71 | | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | |
72 | | PPC_OPCODE_RFMCI | PPC_OPCODE_E500MC); | |
661bd698 AM |
73 | else if ((info->mach == bfd_mach_ppc_e500) |
74 | || (info->disassembler_options | |
75 | && strstr (info->disassembler_options, "e500") != NULL)) | |
4eb30afc AM |
76 | dialect |= (PPC_OPCODE_BOOKE |
77 | | PPC_OPCODE_SPE | PPC_OPCODE_ISEL | |
78 | | PPC_OPCODE_EFS | PPC_OPCODE_BRLOCK | |
79 | | PPC_OPCODE_PMR | PPC_OPCODE_CACHELCK | |
19a6653c | 80 | | PPC_OPCODE_RFMCI | PPC_OPCODE_E500MC); |
661bd698 AM |
81 | else if (info->disassembler_options |
82 | && strstr (info->disassembler_options, "efs") != NULL) | |
4eb30afc | 83 | dialect |= PPC_OPCODE_EFS; |
36ae0db3 DJ |
84 | else if (info->disassembler_options |
85 | && strstr (info->disassembler_options, "e300") != NULL) | |
86 | dialect |= PPC_OPCODE_E300 | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON; | |
64a3a6fc NC |
87 | else if (info->disassembler_options |
88 | && strstr (info->disassembler_options, "440") != NULL) | |
89 | dialect |= PPC_OPCODE_BOOKE | PPC_OPCODE_32 | |
90 | | PPC_OPCODE_440 | PPC_OPCODE_ISEL | PPC_OPCODE_RFMCI; | |
23976049 | 91 | else |
9ec878e3 | 92 | dialect |= (PPC_OPCODE_403 | PPC_OPCODE_601 | PPC_OPCODE_CLASSIC |
4eb30afc | 93 | | PPC_OPCODE_COMMON | PPC_OPCODE_ALTIVEC); |
802a735e | 94 | |
94efba12 | 95 | if (info->disassembler_options |
661bd698 | 96 | && strstr (info->disassembler_options, "power4") != NULL) |
94efba12 AM |
97 | dialect |= PPC_OPCODE_POWER4; |
98 | ||
1ed8e1e4 AM |
99 | if (info->disassembler_options |
100 | && strstr (info->disassembler_options, "power5") != NULL) | |
101 | dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5; | |
102 | ||
ede602d7 AM |
103 | if (info->disassembler_options |
104 | && strstr (info->disassembler_options, "cell") != NULL) | |
105 | dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; | |
106 | ||
9622b051 AM |
107 | if (info->disassembler_options |
108 | && strstr (info->disassembler_options, "power6") != NULL) | |
109 | dialect |= PPC_OPCODE_POWER4 | PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; | |
110 | ||
661bd698 AM |
111 | if (info->disassembler_options |
112 | && strstr (info->disassembler_options, "any") != NULL) | |
113 | dialect |= PPC_OPCODE_ANY; | |
114 | ||
802a735e AM |
115 | if (info->disassembler_options) |
116 | { | |
117 | if (strstr (info->disassembler_options, "32") != NULL) | |
118 | dialect &= ~PPC_OPCODE_64; | |
119 | else if (strstr (info->disassembler_options, "64") != NULL) | |
120 | dialect |= PPC_OPCODE_64; | |
121 | } | |
122 | ||
fa452fa6 PB |
123 | info->private_data = priv; |
124 | POWERPC_DIALECT(info) = dialect; | |
125 | ||
126 | return TRUE; | |
418c1742 MG |
127 | } |
128 | ||
129 | /* Print a big endian PowerPC instruction. */ | |
252b5132 RH |
130 | |
131 | int | |
823bbe9d | 132 | print_insn_big_powerpc (bfd_vma memaddr, struct disassemble_info *info) |
252b5132 | 133 | { |
fa452fa6 PB |
134 | if (info->private_data == NULL && !powerpc_init_dialect (info)) |
135 | return -1; | |
136 | return print_insn_powerpc (memaddr, info, 1, POWERPC_DIALECT(info)); | |
252b5132 RH |
137 | } |
138 | ||
418c1742 | 139 | /* Print a little endian PowerPC instruction. */ |
252b5132 RH |
140 | |
141 | int | |
823bbe9d | 142 | print_insn_little_powerpc (bfd_vma memaddr, struct disassemble_info *info) |
252b5132 | 143 | { |
fa452fa6 PB |
144 | if (info->private_data == NULL && !powerpc_init_dialect (info)) |
145 | return -1; | |
146 | return print_insn_powerpc (memaddr, info, 0, POWERPC_DIALECT(info)); | |
252b5132 RH |
147 | } |
148 | ||
149 | /* Print a POWER (RS/6000) instruction. */ | |
150 | ||
151 | int | |
823bbe9d | 152 | print_insn_rs6000 (bfd_vma memaddr, struct disassemble_info *info) |
252b5132 RH |
153 | { |
154 | return print_insn_powerpc (memaddr, info, 1, PPC_OPCODE_POWER); | |
155 | } | |
156 | ||
ea192fa3 PB |
157 | /* Extract the operand value from the PowerPC or POWER instruction. */ |
158 | ||
159 | static long | |
160 | operand_value_powerpc (const struct powerpc_operand *operand, | |
fa452fa6 | 161 | unsigned long insn, ppc_cpu_t dialect) |
ea192fa3 PB |
162 | { |
163 | long value; | |
164 | int invalid; | |
165 | /* Extract the value from the instruction. */ | |
166 | if (operand->extract) | |
167 | value = (*operand->extract) (insn, dialect, &invalid); | |
168 | else | |
169 | { | |
170 | value = (insn >> operand->shift) & operand->bitm; | |
171 | if ((operand->flags & PPC_OPERAND_SIGNED) != 0) | |
172 | { | |
173 | /* BITM is always some number of zeros followed by some | |
174 | number of ones, followed by some numer of zeros. */ | |
175 | unsigned long top = operand->bitm; | |
176 | /* top & -top gives the rightmost 1 bit, so this | |
177 | fills in any trailing zeros. */ | |
178 | top |= (top & -top) - 1; | |
179 | top &= ~(top >> 1); | |
180 | value = (value ^ top) - top; | |
181 | } | |
182 | } | |
183 | ||
184 | return value; | |
185 | } | |
186 | ||
187 | /* Determine whether the optional operand(s) should be printed. */ | |
188 | ||
189 | static int | |
190 | skip_optional_operands (const unsigned char *opindex, | |
fa452fa6 | 191 | unsigned long insn, ppc_cpu_t dialect) |
ea192fa3 PB |
192 | { |
193 | const struct powerpc_operand *operand; | |
194 | ||
195 | for (; *opindex != 0; opindex++) | |
196 | { | |
197 | operand = &powerpc_operands[*opindex]; | |
198 | if ((operand->flags & PPC_OPERAND_NEXT) != 0 | |
199 | || ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 | |
200 | && operand_value_powerpc (operand, insn, dialect) != 0)) | |
201 | return 0; | |
202 | } | |
203 | ||
204 | return 1; | |
205 | } | |
206 | ||
252b5132 RH |
207 | /* Print a PowerPC or POWER instruction. */ |
208 | ||
209 | static int | |
823bbe9d AM |
210 | print_insn_powerpc (bfd_vma memaddr, |
211 | struct disassemble_info *info, | |
212 | int bigendian, | |
fa452fa6 | 213 | ppc_cpu_t dialect) |
252b5132 RH |
214 | { |
215 | bfd_byte buffer[4]; | |
216 | int status; | |
217 | unsigned long insn; | |
218 | const struct powerpc_opcode *opcode; | |
219 | const struct powerpc_opcode *opcode_end; | |
220 | unsigned long op; | |
221 | ||
222 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); | |
223 | if (status != 0) | |
224 | { | |
225 | (*info->memory_error_func) (status, memaddr, info); | |
226 | return -1; | |
227 | } | |
228 | ||
229 | if (bigendian) | |
230 | insn = bfd_getb32 (buffer); | |
231 | else | |
232 | insn = bfd_getl32 (buffer); | |
233 | ||
234 | /* Get the major opcode of the instruction. */ | |
235 | op = PPC_OP (insn); | |
236 | ||
237 | /* Find the first match in the opcode table. We could speed this up | |
238 | a bit by doing a binary search on the major opcode. */ | |
239 | opcode_end = powerpc_opcodes + powerpc_num_opcodes; | |
661bd698 | 240 | again: |
252b5132 RH |
241 | for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) |
242 | { | |
243 | unsigned long table_op; | |
244 | const unsigned char *opindex; | |
245 | const struct powerpc_operand *operand; | |
246 | int invalid; | |
247 | int need_comma; | |
248 | int need_paren; | |
ea192fa3 | 249 | int skip_optional; |
252b5132 RH |
250 | |
251 | table_op = PPC_OP (opcode->opcode); | |
252 | if (op < table_op) | |
253 | break; | |
254 | if (op > table_op) | |
255 | continue; | |
256 | ||
257 | if ((insn & opcode->mask) != opcode->opcode | |
258 | || (opcode->flags & dialect) == 0) | |
259 | continue; | |
260 | ||
261 | /* Make two passes over the operands. First see if any of them | |
262 | have extraction functions, and, if they do, make sure the | |
263 | instruction is valid. */ | |
264 | invalid = 0; | |
265 | for (opindex = opcode->operands; *opindex != 0; opindex++) | |
266 | { | |
267 | operand = powerpc_operands + *opindex; | |
268 | if (operand->extract) | |
802a735e | 269 | (*operand->extract) (insn, dialect, &invalid); |
252b5132 RH |
270 | } |
271 | if (invalid) | |
272 | continue; | |
273 | ||
274 | /* The instruction is valid. */ | |
252b5132 | 275 | if (opcode->operands[0] != 0) |
fdd12ef3 AM |
276 | (*info->fprintf_func) (info->stream, "%-7s ", opcode->name); |
277 | else | |
278 | (*info->fprintf_func) (info->stream, "%s", opcode->name); | |
252b5132 RH |
279 | |
280 | /* Now extract and print the operands. */ | |
281 | need_comma = 0; | |
282 | need_paren = 0; | |
ea192fa3 | 283 | skip_optional = -1; |
252b5132 RH |
284 | for (opindex = opcode->operands; *opindex != 0; opindex++) |
285 | { | |
286 | long value; | |
287 | ||
288 | operand = powerpc_operands + *opindex; | |
289 | ||
290 | /* Operands that are marked FAKE are simply ignored. We | |
291 | already made sure that the extract function considered | |
292 | the instruction to be valid. */ | |
293 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) | |
294 | continue; | |
295 | ||
ea192fa3 PB |
296 | /* If all of the optional operands have the value zero, |
297 | then don't print any of them. */ | |
65b650b4 AM |
298 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0) |
299 | { | |
300 | if (skip_optional < 0) | |
301 | skip_optional = skip_optional_operands (opindex, insn, | |
302 | dialect); | |
303 | if (skip_optional) | |
304 | continue; | |
305 | } | |
252b5132 | 306 | |
ea192fa3 PB |
307 | value = operand_value_powerpc (operand, insn, dialect); |
308 | ||
252b5132 RH |
309 | if (need_comma) |
310 | { | |
311 | (*info->fprintf_func) (info->stream, ","); | |
312 | need_comma = 0; | |
313 | } | |
314 | ||
315 | /* Print the operand as directed by the flags. */ | |
fdd12ef3 AM |
316 | if ((operand->flags & PPC_OPERAND_GPR) != 0 |
317 | || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0)) | |
252b5132 RH |
318 | (*info->fprintf_func) (info->stream, "r%ld", value); |
319 | else if ((operand->flags & PPC_OPERAND_FPR) != 0) | |
320 | (*info->fprintf_func) (info->stream, "f%ld", value); | |
786e2c0f C |
321 | else if ((operand->flags & PPC_OPERAND_VR) != 0) |
322 | (*info->fprintf_func) (info->stream, "v%ld", value); | |
252b5132 RH |
323 | else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) |
324 | (*info->print_address_func) (memaddr + value, info); | |
325 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) | |
326 | (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info); | |
327 | else if ((operand->flags & PPC_OPERAND_CR) == 0 | |
328 | || (dialect & PPC_OPCODE_PPC) == 0) | |
329 | (*info->fprintf_func) (info->stream, "%ld", value); | |
330 | else | |
331 | { | |
b84bf58a | 332 | if (operand->bitm == 7) |
0fd3a477 | 333 | (*info->fprintf_func) (info->stream, "cr%ld", value); |
252b5132 RH |
334 | else |
335 | { | |
336 | static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; | |
337 | int cr; | |
338 | int cc; | |
339 | ||
340 | cr = value >> 2; | |
341 | if (cr != 0) | |
8b4fa155 | 342 | (*info->fprintf_func) (info->stream, "4*cr%d+", cr); |
252b5132 | 343 | cc = value & 3; |
8b4fa155 | 344 | (*info->fprintf_func) (info->stream, "%s", cbnames[cc]); |
252b5132 RH |
345 | } |
346 | } | |
347 | ||
348 | if (need_paren) | |
349 | { | |
350 | (*info->fprintf_func) (info->stream, ")"); | |
351 | need_paren = 0; | |
352 | } | |
353 | ||
354 | if ((operand->flags & PPC_OPERAND_PARENS) == 0) | |
355 | need_comma = 1; | |
356 | else | |
357 | { | |
358 | (*info->fprintf_func) (info->stream, "("); | |
359 | need_paren = 1; | |
360 | } | |
361 | } | |
362 | ||
363 | /* We have found and printed an instruction; return. */ | |
364 | return 4; | |
365 | } | |
366 | ||
661bd698 AM |
367 | if ((dialect & PPC_OPCODE_ANY) != 0) |
368 | { | |
369 | dialect = ~PPC_OPCODE_ANY; | |
370 | goto again; | |
371 | } | |
372 | ||
252b5132 RH |
373 | /* We could not find a match. */ |
374 | (*info->fprintf_func) (info->stream, ".long 0x%lx", insn); | |
375 | ||
376 | return 4; | |
377 | } | |
07dd56a9 NC |
378 | |
379 | void | |
823bbe9d | 380 | print_ppc_disassembler_options (FILE *stream) |
07dd56a9 NC |
381 | { |
382 | fprintf (stream, "\n\ | |
383 | The following PPC specific disassembler options are supported for use with\n\ | |
384 | the -M switch:\n"); | |
8b4fa155 | 385 | |
07dd56a9 | 386 | fprintf (stream, " booke|booke32|booke64 Disassemble the BookE instructions\n"); |
36ae0db3 | 387 | fprintf (stream, " e300 Disassemble the e300 instructions\n"); |
07dd56a9 | 388 | fprintf (stream, " e500|e500x2 Disassemble the e500 instructions\n"); |
19a6653c | 389 | fprintf (stream, " e500mc Disassemble the e500mc instructions\n"); |
64a3a6fc | 390 | fprintf (stream, " 440 Disassemble the 440 instructions\n"); |
07dd56a9 | 391 | fprintf (stream, " efs Disassemble the EFS instructions\n"); |
c3d65c1c | 392 | fprintf (stream, " ppcps Disassemble the PowerPC paired singles instructions\n"); |
07dd56a9 | 393 | fprintf (stream, " power4 Disassemble the Power4 instructions\n"); |
1ed8e1e4 | 394 | fprintf (stream, " power5 Disassemble the Power5 instructions\n"); |
9622b051 | 395 | fprintf (stream, " power6 Disassemble the Power6 instructions\n"); |
07dd56a9 NC |
396 | fprintf (stream, " 32 Do not disassemble 64-bit instructions\n"); |
397 | fprintf (stream, " 64 Allow disassembly of 64-bit instructions\n"); | |
398 | } |