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
, "booke") != NULL
)
50 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_BOOKE64
;
51 else if ((info
->mach
== bfd_mach_ppc_e500
)
52 || (info
->disassembler_options
53 && strstr (info
->disassembler_options
, "e500") != NULL
))
54 dialect
|= (PPC_OPCODE_BOOKE
55 | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL
56 | PPC_OPCODE_EFS
| PPC_OPCODE_BRLOCK
57 | PPC_OPCODE_PMR
| PPC_OPCODE_CACHELCK
59 else if (info
->disassembler_options
60 && strstr (info
->disassembler_options
, "efs") != NULL
)
61 dialect
|= PPC_OPCODE_EFS
;
62 else if (info
->disassembler_options
63 && strstr (info
->disassembler_options
, "e300") != NULL
)
64 dialect
|= PPC_OPCODE_E300
| PPC_OPCODE_CLASSIC
| PPC_OPCODE_COMMON
;
65 else if (info
->disassembler_options
66 && strstr (info
->disassembler_options
, "440") != NULL
)
67 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_32
68 | PPC_OPCODE_440
| PPC_OPCODE_ISEL
| PPC_OPCODE_RFMCI
;
70 dialect
|= (PPC_OPCODE_403
| PPC_OPCODE_601
| PPC_OPCODE_CLASSIC
71 | PPC_OPCODE_COMMON
| PPC_OPCODE_ALTIVEC
);
73 if (info
->disassembler_options
74 && strstr (info
->disassembler_options
, "power4") != NULL
)
75 dialect
|= PPC_OPCODE_POWER4
;
77 if (info
->disassembler_options
78 && strstr (info
->disassembler_options
, "power5") != NULL
)
79 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
;
81 if (info
->disassembler_options
82 && strstr (info
->disassembler_options
, "cell") != NULL
)
83 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_CELL
| PPC_OPCODE_ALTIVEC
;
85 if (info
->disassembler_options
86 && strstr (info
->disassembler_options
, "power6") != NULL
)
87 dialect
|= PPC_OPCODE_POWER4
| PPC_OPCODE_POWER5
| PPC_OPCODE_POWER6
| PPC_OPCODE_ALTIVEC
;
89 if (info
->disassembler_options
90 && strstr (info
->disassembler_options
, "any") != NULL
)
91 dialect
|= PPC_OPCODE_ANY
;
93 if (info
->disassembler_options
)
95 if (strstr (info
->disassembler_options
, "32") != NULL
)
96 dialect
&= ~PPC_OPCODE_64
;
97 else if (strstr (info
->disassembler_options
, "64") != NULL
)
98 dialect
|= PPC_OPCODE_64
;
101 info
->private_data
= (char *) 0 + dialect
;
105 /* Print a big endian PowerPC instruction. */
108 print_insn_big_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
110 int dialect
= (char *) info
->private_data
- (char *) 0;
111 return print_insn_powerpc (memaddr
, info
, 1, dialect
);
114 /* Print a little endian PowerPC instruction. */
117 print_insn_little_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
119 int dialect
= (char *) info
->private_data
- (char *) 0;
120 return print_insn_powerpc (memaddr
, info
, 0, dialect
);
123 /* Print a POWER (RS/6000) instruction. */
126 print_insn_rs6000 (bfd_vma memaddr
, struct disassemble_info
*info
)
128 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
131 /* Extract the operand value from the PowerPC or POWER instruction. */
134 operand_value_powerpc (const struct powerpc_operand
*operand
,
135 unsigned long insn
, int dialect
)
139 /* Extract the value from the instruction. */
140 if (operand
->extract
)
141 value
= (*operand
->extract
) (insn
, dialect
, &invalid
);
144 value
= (insn
>> operand
->shift
) & operand
->bitm
;
145 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0)
147 /* BITM is always some number of zeros followed by some
148 number of ones, followed by some numer of zeros. */
149 unsigned long top
= operand
->bitm
;
150 /* top & -top gives the rightmost 1 bit, so this
151 fills in any trailing zeros. */
152 top
|= (top
& -top
) - 1;
154 value
= (value
^ top
) - top
;
161 /* Determine whether the optional operand(s) should be printed. */
164 skip_optional_operands (const unsigned char *opindex
,
165 unsigned long insn
, int dialect
)
167 const struct powerpc_operand
*operand
;
169 for (; *opindex
!= 0; opindex
++)
171 operand
= &powerpc_operands
[*opindex
];
172 if ((operand
->flags
& PPC_OPERAND_NEXT
) != 0
173 || ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
174 && operand_value_powerpc (operand
, insn
, dialect
) != 0))
181 /* Print a PowerPC or POWER instruction. */
184 print_insn_powerpc (bfd_vma memaddr
,
185 struct disassemble_info
*info
,
192 const struct powerpc_opcode
*opcode
;
193 const struct powerpc_opcode
*opcode_end
;
197 dialect
= powerpc_dialect (info
);
199 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
202 (*info
->memory_error_func
) (status
, memaddr
, info
);
207 insn
= bfd_getb32 (buffer
);
209 insn
= bfd_getl32 (buffer
);
211 /* Get the major opcode of the instruction. */
214 /* Find the first match in the opcode table. We could speed this up
215 a bit by doing a binary search on the major opcode. */
216 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
218 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
220 unsigned long table_op
;
221 const unsigned char *opindex
;
222 const struct powerpc_operand
*operand
;
228 table_op
= PPC_OP (opcode
->opcode
);
234 if ((insn
& opcode
->mask
) != opcode
->opcode
235 || (opcode
->flags
& dialect
) == 0)
238 /* Make two passes over the operands. First see if any of them
239 have extraction functions, and, if they do, make sure the
240 instruction is valid. */
242 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
244 operand
= powerpc_operands
+ *opindex
;
245 if (operand
->extract
)
246 (*operand
->extract
) (insn
, dialect
, &invalid
);
251 /* The instruction is valid. */
252 if (opcode
->operands
[0] != 0)
253 (*info
->fprintf_func
) (info
->stream
, "%-7s ", opcode
->name
);
255 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
257 /* Now extract and print the operands. */
261 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
265 operand
= powerpc_operands
+ *opindex
;
267 /* Operands that are marked FAKE are simply ignored. We
268 already made sure that the extract function considered
269 the instruction to be valid. */
270 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
273 /* If all of the optional operands have the value zero,
274 then don't print any of them. */
275 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0)
277 if (skip_optional
< 0)
278 skip_optional
= skip_optional_operands (opindex
, insn
,
284 value
= operand_value_powerpc (operand
, insn
, dialect
);
288 (*info
->fprintf_func
) (info
->stream
, ",");
292 /* Print the operand as directed by the flags. */
293 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0
294 || ((operand
->flags
& PPC_OPERAND_GPR_0
) != 0 && value
!= 0))
295 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
296 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
297 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
298 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
299 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
300 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
301 (*info
->print_address_func
) (memaddr
+ value
, info
);
302 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
303 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
304 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
305 || (dialect
& PPC_OPCODE_PPC
) == 0)
306 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
309 if (operand
->bitm
== 7)
310 (*info
->fprintf_func
) (info
->stream
, "cr%ld", value
);
313 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
319 (*info
->fprintf_func
) (info
->stream
, "4*cr%d+", cr
);
321 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
327 (*info
->fprintf_func
) (info
->stream
, ")");
331 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
335 (*info
->fprintf_func
) (info
->stream
, "(");
340 /* We have found and printed an instruction; return. */
344 if ((dialect
& PPC_OPCODE_ANY
) != 0)
346 dialect
= ~PPC_OPCODE_ANY
;
350 /* We could not find a match. */
351 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
357 print_ppc_disassembler_options (FILE *stream
)
359 fprintf (stream
, "\n\
360 The following PPC specific disassembler options are supported for use with\n\
363 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE instructions\n");
364 fprintf (stream
, " e300 Disassemble the e300 instructions\n");
365 fprintf (stream
, " e500|e500x2 Disassemble the e500 instructions\n");
366 fprintf (stream
, " 440 Disassemble the 440 instructions\n");
367 fprintf (stream
, " efs Disassemble the EFS instructions\n");
368 fprintf (stream
, " power4 Disassemble the Power4 instructions\n");
369 fprintf (stream
, " power5 Disassemble the Power5 instructions\n");
370 fprintf (stream
, " power6 Disassemble the Power6 instructions\n");
371 fprintf (stream
, " 32 Do not disassemble 64-bit instructions\n");
372 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");
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