1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
| PPC_OPCODE_ALTIVEC
;
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
))
59 dialect
|= PPC_OPCODE_BOOKE
60 | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL
61 | PPC_OPCODE_EFS
| PPC_OPCODE_BRLOCK
62 | PPC_OPCODE_PMR
| PPC_OPCODE_CACHELCK
64 /* efs* and AltiVec conflict. */
65 dialect
&= ~PPC_OPCODE_ALTIVEC
;
67 else if (info
->disassembler_options
68 && strstr (info
->disassembler_options
, "efs") != NULL
)
70 dialect
|= PPC_OPCODE_EFS
;
71 /* efs* and AltiVec conflict. */
72 dialect
&= ~PPC_OPCODE_ALTIVEC
;
75 dialect
|= (PPC_OPCODE_403
| PPC_OPCODE_601
| PPC_OPCODE_CLASSIC
78 if (info
->disassembler_options
79 && strstr (info
->disassembler_options
, "power4") != NULL
)
80 dialect
|= PPC_OPCODE_POWER4
;
82 if (info
->disassembler_options
83 && strstr (info
->disassembler_options
, "any") != NULL
)
84 dialect
|= PPC_OPCODE_ANY
;
86 if (info
->disassembler_options
)
88 if (strstr (info
->disassembler_options
, "32") != NULL
)
89 dialect
&= ~PPC_OPCODE_64
;
90 else if (strstr (info
->disassembler_options
, "64") != NULL
)
91 dialect
|= PPC_OPCODE_64
;
94 ((struct dis_private
*) &info
->private_data
)->dialect
= dialect
;
98 /* Print a big endian PowerPC instruction. */
101 print_insn_big_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
103 int dialect
= ((struct dis_private
*) &info
->private_data
)->dialect
;
104 return print_insn_powerpc (memaddr
, info
, 1, dialect
);
107 /* Print a little endian PowerPC instruction. */
110 print_insn_little_powerpc (bfd_vma memaddr
, struct disassemble_info
*info
)
112 int dialect
= ((struct dis_private
*) &info
->private_data
)->dialect
;
113 return print_insn_powerpc (memaddr
, info
, 0, dialect
);
116 /* Print a POWER (RS/6000) instruction. */
119 print_insn_rs6000 (bfd_vma memaddr
, struct disassemble_info
*info
)
121 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
124 /* Print a PowerPC or POWER instruction. */
127 print_insn_powerpc (bfd_vma memaddr
,
128 struct disassemble_info
*info
,
135 const struct powerpc_opcode
*opcode
;
136 const struct powerpc_opcode
*opcode_end
;
140 dialect
= powerpc_dialect (info
);
142 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
145 (*info
->memory_error_func
) (status
, memaddr
, info
);
150 insn
= bfd_getb32 (buffer
);
152 insn
= bfd_getl32 (buffer
);
154 /* Get the major opcode of the instruction. */
157 /* Find the first match in the opcode table. We could speed this up
158 a bit by doing a binary search on the major opcode. */
159 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
161 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
163 unsigned long table_op
;
164 const unsigned char *opindex
;
165 const struct powerpc_operand
*operand
;
170 table_op
= PPC_OP (opcode
->opcode
);
176 if ((insn
& opcode
->mask
) != opcode
->opcode
177 || (opcode
->flags
& dialect
) == 0)
180 /* Make two passes over the operands. First see if any of them
181 have extraction functions, and, if they do, make sure the
182 instruction is valid. */
184 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
186 operand
= powerpc_operands
+ *opindex
;
187 if (operand
->extract
)
188 (*operand
->extract
) (insn
, dialect
, &invalid
);
193 /* The instruction is valid. */
194 if (opcode
->operands
[0] != 0)
195 (*info
->fprintf_func
) (info
->stream
, "%-7s ", opcode
->name
);
197 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
199 /* Now extract and print the operands. */
202 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
206 operand
= powerpc_operands
+ *opindex
;
208 /* Operands that are marked FAKE are simply ignored. We
209 already made sure that the extract function considered
210 the instruction to be valid. */
211 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
214 /* Extract the value from the instruction. */
215 if (operand
->extract
)
216 value
= (*operand
->extract
) (insn
, dialect
, &invalid
);
219 value
= (insn
>> operand
->shift
) & ((1 << operand
->bits
) - 1);
220 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0
221 && (value
& (1 << (operand
->bits
- 1))) != 0)
222 value
-= 1 << operand
->bits
;
225 /* If the operand is optional, and the value is zero, don't
227 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
228 && (operand
->flags
& PPC_OPERAND_NEXT
) == 0
234 (*info
->fprintf_func
) (info
->stream
, ",");
238 /* Print the operand as directed by the flags. */
239 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0
240 || ((operand
->flags
& PPC_OPERAND_GPR_0
) != 0 && value
!= 0))
241 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
242 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
243 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
244 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
245 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
246 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
247 (*info
->print_address_func
) (memaddr
+ value
, info
);
248 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
249 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
250 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
251 || (dialect
& PPC_OPCODE_PPC
) == 0)
252 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
255 if (operand
->bits
== 3)
256 (*info
->fprintf_func
) (info
->stream
, "cr%d", value
);
259 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
265 (*info
->fprintf_func
) (info
->stream
, "4*cr%d+", cr
);
267 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
273 (*info
->fprintf_func
) (info
->stream
, ")");
277 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
281 (*info
->fprintf_func
) (info
->stream
, "(");
286 /* We have found and printed an instruction; return. */
290 if ((dialect
& PPC_OPCODE_ANY
) != 0)
292 dialect
= ~PPC_OPCODE_ANY
;
296 /* We could not find a match. */
297 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
303 print_ppc_disassembler_options (FILE *stream
)
305 fprintf (stream
, "\n\
306 The following PPC specific disassembler options are supported for use with\n\
309 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE 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
, " 32 Do not disassemble 64-bit instructions\n");
314 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");
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