1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support
6 This file is part of GDB, GAS, and the GNU binutils.
8 GDB, GAS, and the GNU binutils are free software; you can redistribute
9 them and/or modify them under the terms of the GNU General Public
10 License as published by the Free Software Foundation; either version
11 2, or (at your option) any later version.
13 GDB, GAS, and the GNU binutils are distributed in the hope that they
14 will be useful, but WITHOUT ANY WARRANTY; without even the implied
15 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 the GNU General Public 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 Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 #include "opcode/ppc.h"
27 /* This file provides several disassembler functions, all of which use
28 the disassembler interface defined in dis-asm.h. Several functions
29 are provided because this file handles disassembly for the PowerPC
30 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, int);
36 /* Stash the result of parsing disassembler_options here. */
40 /* Determine which set of machines to disassemble for. PPC403/601 or
41 BookE. For convenience, also disassemble instructions supported
42 by the AltiVec vector unit. */
45 powerpc_dialect (struct disassemble_info
*info
)
47 int dialect
= PPC_OPCODE_PPC
;
49 if (BFD_DEFAULT_TARGET_SIZE
== 64)
50 dialect
|= PPC_OPCODE_64
;
52 if (info
->disassembler_options
53 && strstr (info
->disassembler_options
, "booke") != NULL
)
54 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_BOOKE64
;
55 else if ((info
->mach
== bfd_mach_ppc_e500
)
56 || (info
->disassembler_options
57 && strstr (info
->disassembler_options
, "e500") != NULL
))
58 dialect
|= (PPC_OPCODE_BOOKE
59 | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL
60 | PPC_OPCODE_EFS
| PPC_OPCODE_BRLOCK
61 | PPC_OPCODE_PMR
| PPC_OPCODE_CACHELCK
63 else if (info
->disassembler_options
64 && strstr (info
->disassembler_options
, "efs") != NULL
)
65 dialect
|= PPC_OPCODE_EFS
;
66 else if (info
->disassembler_options
67 && strstr (info
->disassembler_options
, "e300") != NULL
)
68 dialect
|= PPC_OPCODE_E300
| PPC_OPCODE_CLASSIC
| PPC_OPCODE_COMMON
;
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
, "any") != NULL
)
83 dialect
|= PPC_OPCODE_ANY
;
85 if (info
->disassembler_options
)
87 if (strstr (info
->disassembler_options
, "32") != NULL
)
88 dialect
&= ~PPC_OPCODE_64
;
89 else if (strstr (info
->disassembler_options
, "64") != NULL
)
90 dialect
|= PPC_OPCODE_64
;
93 ((struct dis_private
*) &info
->private_data
)->dialect
= dialect
;
97 /* Print a big endian PowerPC instruction. */
100 print_insn_big_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
102 int dialect
= ((struct dis_private
*) &info
->private_data
)->dialect
;
103 return print_insn_powerpc (memaddr
, info
, 1, dialect
);
106 /* Print a little endian PowerPC instruction. */
109 print_insn_little_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
111 int dialect
= ((struct dis_private
*) &info
->private_data
)->dialect
;
112 return print_insn_powerpc (memaddr
, info
, 0, dialect
);
115 /* Print a POWER (RS/6000) instruction. */
118 print_insn_rs6000 (bfd_vma memaddr
, struct disassemble_info
*info
)
120 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
123 /* Print a PowerPC or POWER instruction. */
126 print_insn_powerpc (bfd_vma memaddr
,
127 struct disassemble_info
*info
,
134 const struct powerpc_opcode
*opcode
;
135 const struct powerpc_opcode
*opcode_end
;
139 dialect
= powerpc_dialect (info
);
141 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
144 (*info
->memory_error_func
) (status
, memaddr
, info
);
149 insn
= bfd_getb32 (buffer
);
151 insn
= bfd_getl32 (buffer
);
153 /* Get the major opcode of the instruction. */
156 /* Find the first match in the opcode table. We could speed this up
157 a bit by doing a binary search on the major opcode. */
158 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
160 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
162 unsigned long table_op
;
163 const unsigned char *opindex
;
164 const struct powerpc_operand
*operand
;
169 table_op
= PPC_OP (opcode
->opcode
);
175 if ((insn
& opcode
->mask
) != opcode
->opcode
176 || (opcode
->flags
& dialect
) == 0)
179 /* Make two passes over the operands. First see if any of them
180 have extraction functions, and, if they do, make sure the
181 instruction is valid. */
183 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
185 operand
= powerpc_operands
+ *opindex
;
186 if (operand
->extract
)
187 (*operand
->extract
) (insn
, dialect
, &invalid
);
192 /* The instruction is valid. */
193 if (opcode
->operands
[0] != 0)
194 (*info
->fprintf_func
) (info
->stream
, "%-7s ", opcode
->name
);
196 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
198 /* Now extract and print the operands. */
201 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
205 operand
= powerpc_operands
+ *opindex
;
207 /* Operands that are marked FAKE are simply ignored. We
208 already made sure that the extract function considered
209 the instruction to be valid. */
210 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
213 /* Extract the value from the instruction. */
214 if (operand
->extract
)
215 value
= (*operand
->extract
) (insn
, dialect
, &invalid
);
218 value
= (insn
>> operand
->shift
) & ((1 << operand
->bits
) - 1);
219 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0
220 && (value
& (1 << (operand
->bits
- 1))) != 0)
221 value
-= 1 << operand
->bits
;
224 /* If the operand is optional, and the value is zero, don't
226 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
227 && (operand
->flags
& PPC_OPERAND_NEXT
) == 0
233 (*info
->fprintf_func
) (info
->stream
, ",");
237 /* Print the operand as directed by the flags. */
238 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0
239 || ((operand
->flags
& PPC_OPERAND_GPR_0
) != 0 && value
!= 0))
240 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
241 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
242 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
243 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
244 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
245 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
246 (*info
->print_address_func
) (memaddr
+ value
, info
);
247 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
248 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
249 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
250 || (dialect
& PPC_OPCODE_PPC
) == 0)
251 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
254 if (operand
->bits
== 3)
255 (*info
->fprintf_func
) (info
->stream
, "cr%ld", value
);
258 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
264 (*info
->fprintf_func
) (info
->stream
, "4*cr%d+", cr
);
266 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
272 (*info
->fprintf_func
) (info
->stream
, ")");
276 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
280 (*info
->fprintf_func
) (info
->stream
, "(");
285 /* We have found and printed an instruction; return. */
289 if ((dialect
& PPC_OPCODE_ANY
) != 0)
291 dialect
= ~PPC_OPCODE_ANY
;
295 /* We could not find a match. */
296 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
302 print_ppc_disassembler_options (FILE *stream
)
304 fprintf (stream
, "\n\
305 The following PPC specific disassembler options are supported for use with\n\
308 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE instructions\n");
309 fprintf (stream
, " e300 Disassemble the e300 instructions\n");
310 fprintf (stream
, " e500|e500x2 Disassemble the e500 instructions\n");
311 fprintf (stream
, " efs Disassemble the EFS instructions\n");
312 fprintf (stream
, " power4 Disassemble the Power4 instructions\n");
313 fprintf (stream
, " power5 Disassemble the Power5 instructions\n");
314 fprintf (stream
, " 32 Do not disassemble 64-bit instructions\n");
315 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");