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)
34 static int print_insn_powerpc (bfd_vma
, struct disassemble_info
*, int, int);
36 /* Determine which set of machines to disassemble for. PPC403/601 or
37 BookE. For convenience, also disassemble instructions supported
38 by the AltiVec vector unit. */
41 powerpc_dialect (struct disassemble_info
*info
)
43 int dialect
= PPC_OPCODE_PPC
;
45 if (BFD_DEFAULT_TARGET_SIZE
== 64)
46 dialect
|= PPC_OPCODE_64
;
48 if (info
->disassembler_options
49 && strstr (info
->disassembler_options
, "ppcps") != NULL
)
50 dialect
|= PPC_OPCODE_PPCPS
;
51 else if (info
->disassembler_options
52 && strstr (info
->disassembler_options
, "booke") != NULL
)
53 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_BOOKE64
;
54 else if ((info
->mach
== bfd_mach_ppc_e500
)
55 || (info
->disassembler_options
56 && strstr (info
->disassembler_options
, "e500") != NULL
))
57 dialect
|= (PPC_OPCODE_BOOKE
58 | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL
59 | PPC_OPCODE_EFS
| PPC_OPCODE_BRLOCK
60 | PPC_OPCODE_PMR
| PPC_OPCODE_CACHELCK
62 else if (info
->disassembler_options
63 && strstr (info
->disassembler_options
, "efs") != NULL
)
64 dialect
|= PPC_OPCODE_EFS
;
65 else if (info
->disassembler_options
66 && strstr (info
->disassembler_options
, "e300") != NULL
)
67 dialect
|= PPC_OPCODE_E300
| PPC_OPCODE_CLASSIC
| PPC_OPCODE_COMMON
;
68 else if (info
->disassembler_options
69 && strstr (info
->disassembler_options
, "440") != NULL
)
70 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_32
71 | PPC_OPCODE_440
| PPC_OPCODE_ISEL
| PPC_OPCODE_RFMCI
;
73 dialect
|= (PPC_OPCODE_403
| PPC_OPCODE_601
| PPC_OPCODE_CLASSIC
74 | PPC_OPCODE_COMMON
| PPC_OPCODE_ALTIVEC
);
76 if (info
->disassembler_options
77 && strstr (info
->disassembler_options
, "power4") != NULL
)
78 dialect
|= PPC_OPCODE_POWER4
;
80 if (info
->disassembler_options
81 && strstr (info
->disassembler_options
, "power5") != NULL
)
82 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
;
84 if (info
->disassembler_options
85 && strstr (info
->disassembler_options
, "cell") != NULL
)
86 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_CELL
| PPC_OPCODE_ALTIVEC
;
88 if (info
->disassembler_options
89 && strstr (info
->disassembler_options
, "power6") != NULL
)
90 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
| PPC_OPCODE_POWER6
| PPC_OPCODE_ALTIVEC
;
92 if (info
->disassembler_options
93 && strstr (info
->disassembler_options
, "any") != NULL
)
94 dialect
|= PPC_OPCODE_ANY
;
96 if (info
->disassembler_options
)
98 if (strstr (info
->disassembler_options
, "32") != NULL
)
99 dialect
&= ~PPC_OPCODE_64
;
100 else if (strstr (info
->disassembler_options
, "64") != NULL
)
101 dialect
|= PPC_OPCODE_64
;
104 info
->private_data
= (char *) 0 + dialect
;
108 /* Print a big endian PowerPC instruction. */
111 print_insn_big_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
113 int dialect
= (char *) info
->private_data
- (char *) 0;
114 return print_insn_powerpc (memaddr
, info
, 1, dialect
);
117 /* Print a little endian PowerPC instruction. */
120 print_insn_little_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
122 int dialect
= (char *) info
->private_data
- (char *) 0;
123 return print_insn_powerpc (memaddr
, info
, 0, dialect
);
126 /* Print a POWER (RS/6000) instruction. */
129 print_insn_rs6000 (bfd_vma memaddr
, struct disassemble_info
*info
)
131 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
134 /* Extract the operand value from the PowerPC or POWER instruction. */
137 operand_value_powerpc (const struct powerpc_operand
*operand
,
138 unsigned long insn
, int dialect
)
142 /* Extract the value from the instruction. */
143 if (operand
->extract
)
144 value
= (*operand
->extract
) (insn
, dialect
, &invalid
);
147 value
= (insn
>> operand
->shift
) & operand
->bitm
;
148 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0)
150 /* BITM is always some number of zeros followed by some
151 number of ones, followed by some numer of zeros. */
152 unsigned long top
= operand
->bitm
;
153 /* top & -top gives the rightmost 1 bit, so this
154 fills in any trailing zeros. */
155 top
|= (top
& -top
) - 1;
157 value
= (value
^ top
) - top
;
164 /* Determine whether the optional operand(s) should be printed. */
167 skip_optional_operands (const unsigned char *opindex
,
168 unsigned long insn
, int dialect
)
170 const struct powerpc_operand
*operand
;
172 for (; *opindex
!= 0; opindex
++)
174 operand
= &powerpc_operands
[*opindex
];
175 if ((operand
->flags
& PPC_OPERAND_NEXT
) != 0
176 || ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
177 && operand_value_powerpc (operand
, insn
, dialect
) != 0))
184 /* Print a PowerPC or POWER instruction. */
187 print_insn_powerpc (bfd_vma memaddr
,
188 struct disassemble_info
*info
,
195 const struct powerpc_opcode
*opcode
;
196 const struct powerpc_opcode
*opcode_end
;
200 dialect
= powerpc_dialect (info
);
202 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
205 (*info
->memory_error_func
) (status
, memaddr
, info
);
210 insn
= bfd_getb32 (buffer
);
212 insn
= bfd_getl32 (buffer
);
214 /* Get the major opcode of the instruction. */
217 /* Find the first match in the opcode table. We could speed this up
218 a bit by doing a binary search on the major opcode. */
219 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
221 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
223 unsigned long table_op
;
224 const unsigned char *opindex
;
225 const struct powerpc_operand
*operand
;
231 table_op
= PPC_OP (opcode
->opcode
);
237 if ((insn
& opcode
->mask
) != opcode
->opcode
238 || (opcode
->flags
& dialect
) == 0)
241 /* Make two passes over the operands. First see if any of them
242 have extraction functions, and, if they do, make sure the
243 instruction is valid. */
245 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
247 operand
= powerpc_operands
+ *opindex
;
248 if (operand
->extract
)
249 (*operand
->extract
) (insn
, dialect
, &invalid
);
254 /* The instruction is valid. */
255 if (opcode
->operands
[0] != 0)
256 (*info
->fprintf_func
) (info
->stream
, "%-7s ", opcode
->name
);
258 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
260 /* Now extract and print the operands. */
264 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
268 operand
= powerpc_operands
+ *opindex
;
270 /* Operands that are marked FAKE are simply ignored. We
271 already made sure that the extract function considered
272 the instruction to be valid. */
273 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
276 /* If all of the optional operands have the value zero,
277 then don't print any of them. */
278 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0)
280 if (skip_optional
< 0)
281 skip_optional
= skip_optional_operands (opindex
, insn
,
287 value
= operand_value_powerpc (operand
, insn
, dialect
);
291 (*info
->fprintf_func
) (info
->stream
, ",");
295 /* Print the operand as directed by the flags. */
296 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0
297 || ((operand
->flags
& PPC_OPERAND_GPR_0
) != 0 && value
!= 0))
298 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
299 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
300 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
301 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
302 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
303 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
304 (*info
->print_address_func
) (memaddr
+ value
, info
);
305 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
306 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
307 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
308 || (dialect
& PPC_OPCODE_PPC
) == 0)
309 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
312 if (operand
->bitm
== 7)
313 (*info
->fprintf_func
) (info
->stream
, "cr%ld", value
);
316 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
322 (*info
->fprintf_func
) (info
->stream
, "4*cr%d+", cr
);
324 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
330 (*info
->fprintf_func
) (info
->stream
, ")");
334 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
338 (*info
->fprintf_func
) (info
->stream
, "(");
343 /* We have found and printed an instruction; return. */
347 if ((dialect
& PPC_OPCODE_ANY
) != 0)
349 dialect
= ~PPC_OPCODE_ANY
;
353 /* We could not find a match. */
354 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
360 print_ppc_disassembler_options (FILE *stream
)
362 fprintf (stream
, "\n\
363 The following PPC specific disassembler options are supported for use with\n\
366 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE instructions\n");
367 fprintf (stream
, " e300 Disassemble the e300 instructions\n");
368 fprintf (stream
, " e500|e500x2 Disassemble the e500 instructions\n");
369 fprintf (stream
, " 440 Disassemble the 440 instructions\n");
370 fprintf (stream
, " efs Disassemble the EFS instructions\n");
371 fprintf (stream
, " ppcps Disassemble the PowerPC paired singles instructions\n");
372 fprintf (stream
, " power4 Disassemble the Power4 instructions\n");
373 fprintf (stream
, " power5 Disassemble the Power5 instructions\n");
374 fprintf (stream
, " power6 Disassemble the Power6 instructions\n");
375 fprintf (stream
, " 32 Do not disassemble 64-bit instructions\n");
376 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");
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