1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support
6 This file is part of the GNU opcodes library.
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)
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.
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. */
26 #include "opcode/ppc.h"
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)
33 static int print_insn_powerpc (bfd_vma
, struct disassemble_info
*, int,
38 /* Stash the result of parsing disassembler_options here. */
42 #define POWERPC_DIALECT(INFO) \
43 (((struct dis_private *) ((INFO)->private_data))->dialect)
45 /* Determine which set of machines to disassemble for. PPC403/601 or
46 BookE. For convenience, also disassemble instructions supported
47 by the AltiVec vector unit. */
50 powerpc_init_dialect (struct disassemble_info
*info
)
52 ppc_cpu_t dialect
= PPC_OPCODE_PPC
;
53 struct dis_private
*priv
= calloc (sizeof (*priv
), 1);
58 if (BFD_DEFAULT_TARGET_SIZE
== 64)
59 dialect
|= PPC_OPCODE_64
;
61 if (info
->disassembler_options
62 && strstr (info
->disassembler_options
, "ppcps") != NULL
)
63 dialect
|= PPC_OPCODE_PPCPS
;
64 else if (info
->disassembler_options
65 && strstr (info
->disassembler_options
, "booke") != NULL
)
66 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_BOOKE64
;
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
);
73 else if ((info
->mach
== bfd_mach_ppc_e500
)
74 || (info
->disassembler_options
75 && strstr (info
->disassembler_options
, "e500") != NULL
))
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
80 | PPC_OPCODE_RFMCI
| PPC_OPCODE_E500MC
);
81 else if (info
->disassembler_options
82 && strstr (info
->disassembler_options
, "efs") != NULL
)
83 dialect
|= PPC_OPCODE_EFS
;
84 else if (info
->disassembler_options
85 && strstr (info
->disassembler_options
, "e300") != NULL
)
86 dialect
|= PPC_OPCODE_E300
| PPC_OPCODE_CLASSIC
| PPC_OPCODE_COMMON
;
87 else if (info
->disassembler_options
88 && (strstr (info
->disassembler_options
, "440") != NULL
89 || strstr (info
->disassembler_options
, "464") != NULL
))
90 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_32
91 | PPC_OPCODE_440
| PPC_OPCODE_ISEL
| PPC_OPCODE_RFMCI
;
93 dialect
|= (PPC_OPCODE_403
| PPC_OPCODE_601
| PPC_OPCODE_CLASSIC
94 | PPC_OPCODE_COMMON
| PPC_OPCODE_ALTIVEC
);
96 if (info
->disassembler_options
97 && strstr (info
->disassembler_options
, "power4") != NULL
)
98 dialect
|= PPC_OPCODE_POWER4
;
100 if (info
->disassembler_options
101 && strstr (info
->disassembler_options
, "power5") != NULL
)
102 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
;
104 if (info
->disassembler_options
105 && strstr (info
->disassembler_options
, "cell") != NULL
)
106 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_CELL
| PPC_OPCODE_ALTIVEC
;
108 if (info
->disassembler_options
109 && strstr (info
->disassembler_options
, "power6") != NULL
)
110 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
| PPC_OPCODE_POWER6
| PPC_OPCODE_ALTIVEC
;
112 if (info
->disassembler_options
113 && strstr (info
->disassembler_options
, "any") != NULL
)
114 dialect
|= PPC_OPCODE_ANY
;
116 if (info
->disassembler_options
)
118 if (strstr (info
->disassembler_options
, "32") != NULL
)
119 dialect
&= ~PPC_OPCODE_64
;
120 else if (strstr (info
->disassembler_options
, "64") != NULL
)
121 dialect
|= PPC_OPCODE_64
;
124 info
->private_data
= priv
;
125 POWERPC_DIALECT(info
) = dialect
;
130 /* Print a big endian PowerPC instruction. */
133 print_insn_big_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
135 if (info
->private_data
== NULL
&& !powerpc_init_dialect (info
))
137 return print_insn_powerpc (memaddr
, info
, 1, POWERPC_DIALECT(info
));
140 /* Print a little endian PowerPC instruction. */
143 print_insn_little_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
145 if (info
->private_data
== NULL
&& !powerpc_init_dialect (info
))
147 return print_insn_powerpc (memaddr
, info
, 0, POWERPC_DIALECT(info
));
150 /* Print a POWER (RS/6000) instruction. */
153 print_insn_rs6000 (bfd_vma memaddr
, struct disassemble_info
*info
)
155 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
158 /* Extract the operand value from the PowerPC or POWER instruction. */
161 operand_value_powerpc (const struct powerpc_operand
*operand
,
162 unsigned long insn
, ppc_cpu_t dialect
)
166 /* Extract the value from the instruction. */
167 if (operand
->extract
)
168 value
= (*operand
->extract
) (insn
, dialect
, &invalid
);
171 value
= (insn
>> operand
->shift
) & operand
->bitm
;
172 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0)
174 /* BITM is always some number of zeros followed by some
175 number of ones, followed by some numer of zeros. */
176 unsigned long top
= operand
->bitm
;
177 /* top & -top gives the rightmost 1 bit, so this
178 fills in any trailing zeros. */
179 top
|= (top
& -top
) - 1;
181 value
= (value
^ top
) - top
;
188 /* Determine whether the optional operand(s) should be printed. */
191 skip_optional_operands (const unsigned char *opindex
,
192 unsigned long insn
, ppc_cpu_t dialect
)
194 const struct powerpc_operand
*operand
;
196 for (; *opindex
!= 0; opindex
++)
198 operand
= &powerpc_operands
[*opindex
];
199 if ((operand
->flags
& PPC_OPERAND_NEXT
) != 0
200 || ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
201 && operand_value_powerpc (operand
, insn
, dialect
) != 0))
208 /* Print a PowerPC or POWER instruction. */
211 print_insn_powerpc (bfd_vma memaddr
,
212 struct disassemble_info
*info
,
219 const struct powerpc_opcode
*opcode
;
220 const struct powerpc_opcode
*opcode_end
;
223 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
226 (*info
->memory_error_func
) (status
, memaddr
, info
);
231 insn
= bfd_getb32 (buffer
);
233 insn
= bfd_getl32 (buffer
);
235 /* Get the major opcode of the instruction. */
238 /* Find the first match in the opcode table. We could speed this up
239 a bit by doing a binary search on the major opcode. */
240 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
242 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
244 unsigned long table_op
;
245 const unsigned char *opindex
;
246 const struct powerpc_operand
*operand
;
252 table_op
= PPC_OP (opcode
->opcode
);
258 if ((insn
& opcode
->mask
) != opcode
->opcode
259 || (opcode
->flags
& dialect
) == 0)
262 /* Make two passes over the operands. First see if any of them
263 have extraction functions, and, if they do, make sure the
264 instruction is valid. */
266 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
268 operand
= powerpc_operands
+ *opindex
;
269 if (operand
->extract
)
270 (*operand
->extract
) (insn
, dialect
, &invalid
);
275 /* The instruction is valid. */
276 if (opcode
->operands
[0] != 0)
277 (*info
->fprintf_func
) (info
->stream
, "%-7s ", opcode
->name
);
279 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
281 /* Now extract and print the operands. */
285 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
289 operand
= powerpc_operands
+ *opindex
;
291 /* Operands that are marked FAKE are simply ignored. We
292 already made sure that the extract function considered
293 the instruction to be valid. */
294 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
297 /* If all of the optional operands have the value zero,
298 then don't print any of them. */
299 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0)
301 if (skip_optional
< 0)
302 skip_optional
= skip_optional_operands (opindex
, insn
,
308 value
= operand_value_powerpc (operand
, insn
, dialect
);
312 (*info
->fprintf_func
) (info
->stream
, ",");
316 /* Print the operand as directed by the flags. */
317 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0
318 || ((operand
->flags
& PPC_OPERAND_GPR_0
) != 0 && value
!= 0))
319 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
320 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
321 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
322 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
323 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
324 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
325 (*info
->print_address_func
) (memaddr
+ value
, info
);
326 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
327 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
328 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
329 || (dialect
& PPC_OPCODE_PPC
) == 0)
330 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
333 if (operand
->bitm
== 7)
334 (*info
->fprintf_func
) (info
->stream
, "cr%ld", value
);
337 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
343 (*info
->fprintf_func
) (info
->stream
, "4*cr%d+", cr
);
345 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
351 (*info
->fprintf_func
) (info
->stream
, ")");
355 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
359 (*info
->fprintf_func
) (info
->stream
, "(");
364 /* We have found and printed an instruction; return. */
368 if ((dialect
& PPC_OPCODE_ANY
) != 0)
370 dialect
= ~PPC_OPCODE_ANY
;
374 /* We could not find a match. */
375 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
381 print_ppc_disassembler_options (FILE *stream
)
383 fprintf (stream
, "\n\
384 The following PPC specific disassembler options are supported for use with\n\
387 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE instructions\n");
388 fprintf (stream
, " e300 Disassemble the e300 instructions\n");
389 fprintf (stream
, " e500|e500x2 Disassemble the e500 instructions\n");
390 fprintf (stream
, " e500mc Disassemble the e500mc instructions\n");
391 fprintf (stream
, " 440 Disassemble the 440 instructions\n");
392 fprintf (stream
, " 464 Disassemble the 464 instructions\n");
393 fprintf (stream
, " efs Disassemble the EFS instructions\n");
394 fprintf (stream
, " ppcps Disassemble the PowerPC paired singles instructions\n");
395 fprintf (stream
, " power4 Disassemble the Power4 instructions\n");
396 fprintf (stream
, " power5 Disassemble the Power5 instructions\n");
397 fprintf (stream
, " power6 Disassemble the Power6 instructions\n");
398 fprintf (stream
, " 32 Do not disassemble 64-bit instructions\n");
399 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");