1 /* ppc-dis.c -- Disassemble PowerPC instructions
2 Copyright 1994, 1995, 2000, 2001, 2002 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support
5 This file is part of GDB, GAS, and the GNU binutils.
7 GDB, GAS, and the GNU binutils are free software; you can redistribute
8 them and/or modify them under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either version
10 2, or (at your option) any later version.
12 GDB, GAS, and the GNU binutils are distributed in the hope that they
13 will be useful, but WITHOUT ANY WARRANTY; without even the implied
14 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this file; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "opcode/ppc.h"
26 /* This file provides several disassembler functions, all of which use
27 the disassembler interface defined in dis-asm.h. Several functions
28 are provided because this file handles disassembly for the PowerPC
29 in both big and little endian mode and also for the POWER (RS/6000)
32 static int print_insn_powerpc
PARAMS ((bfd_vma
, struct disassemble_info
*,
33 int bigendian
, int dialect
));
35 static int powerpc_dialect
PARAMS ((struct disassemble_info
*));
37 /* Determine which set of machines to disassemble for. PPC403/601 or
38 BookE. For convenience, also disassemble instructions supported
39 by the AltiVec vector unit. */
43 struct disassemble_info
*info
;
45 int dialect
= PPC_OPCODE_PPC
| PPC_OPCODE_ALTIVEC
;
47 if (BFD_DEFAULT_TARGET_SIZE
== 64)
48 dialect
|= PPC_OPCODE_64
;
50 if (info
->disassembler_options
51 && (strcmp (info
->disassembler_options
, "booke") == 0
52 || strcmp (info
->disassembler_options
, "booke32") == 0
53 || strcmp (info
->disassembler_options
, "booke64") == 0))
54 dialect
|= PPC_OPCODE_BOOKE
| PPC_OPCODE_BOOKE64
;
56 dialect
|= PPC_OPCODE_403
| PPC_OPCODE_601
;
58 if (info
->disassembler_options
59 && strcmp (info
->disassembler_options
, "power4") == 0)
60 dialect
|= PPC_OPCODE_POWER4
;
62 if (info
->disassembler_options
)
64 if (strstr (info
->disassembler_options
, "32") != NULL
)
65 dialect
&= ~PPC_OPCODE_64
;
66 else if (strstr (info
->disassembler_options
, "64") != NULL
)
67 dialect
|= PPC_OPCODE_64
;
73 /* Print a big endian PowerPC instruction. */
76 print_insn_big_powerpc (memaddr
, info
)
78 struct disassemble_info
*info
;
80 return print_insn_powerpc (memaddr
, info
, 1, powerpc_dialect(info
));
83 /* Print a little endian PowerPC instruction. */
86 print_insn_little_powerpc (memaddr
, info
)
88 struct disassemble_info
*info
;
90 return print_insn_powerpc (memaddr
, info
, 0, powerpc_dialect(info
));
93 /* Print a POWER (RS/6000) instruction. */
96 print_insn_rs6000 (memaddr
, info
)
98 struct disassemble_info
*info
;
100 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
103 /* Print a PowerPC or POWER instruction. */
106 print_insn_powerpc (memaddr
, info
, bigendian
, dialect
)
108 struct disassemble_info
*info
;
115 const struct powerpc_opcode
*opcode
;
116 const struct powerpc_opcode
*opcode_end
;
119 status
= (*info
->read_memory_func
) (memaddr
, buffer
, 4, info
);
122 (*info
->memory_error_func
) (status
, memaddr
, info
);
127 insn
= bfd_getb32 (buffer
);
129 insn
= bfd_getl32 (buffer
);
131 /* Get the major opcode of the instruction. */
134 /* Find the first match in the opcode table. We could speed this up
135 a bit by doing a binary search on the major opcode. */
136 opcode_end
= powerpc_opcodes
+ powerpc_num_opcodes
;
137 for (opcode
= powerpc_opcodes
; opcode
< opcode_end
; opcode
++)
139 unsigned long table_op
;
140 const unsigned char *opindex
;
141 const struct powerpc_operand
*operand
;
146 table_op
= PPC_OP (opcode
->opcode
);
152 if ((insn
& opcode
->mask
) != opcode
->opcode
153 || (opcode
->flags
& dialect
) == 0)
156 /* Make two passes over the operands. First see if any of them
157 have extraction functions, and, if they do, make sure the
158 instruction is valid. */
160 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
162 operand
= powerpc_operands
+ *opindex
;
163 if (operand
->extract
)
164 (*operand
->extract
) (insn
, dialect
, &invalid
);
169 /* The instruction is valid. */
170 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
171 if (opcode
->operands
[0] != 0)
172 (*info
->fprintf_func
) (info
->stream
, "\t");
174 /* Now extract and print the operands. */
177 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
181 operand
= powerpc_operands
+ *opindex
;
183 /* Operands that are marked FAKE are simply ignored. We
184 already made sure that the extract function considered
185 the instruction to be valid. */
186 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
189 /* Extract the value from the instruction. */
190 if (operand
->extract
)
191 value
= (*operand
->extract
) (insn
, dialect
, (int *) NULL
);
194 value
= (insn
>> operand
->shift
) & ((1 << operand
->bits
) - 1);
195 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0
196 && (value
& (1 << (operand
->bits
- 1))) != 0)
197 value
-= 1 << operand
->bits
;
200 /* If the operand is optional, and the value is zero, don't
202 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
203 && (operand
->flags
& PPC_OPERAND_NEXT
) == 0
209 (*info
->fprintf_func
) (info
->stream
, ",");
213 /* Print the operand as directed by the flags. */
214 if ((operand
->flags
& PPC_OPERAND_GPR
) != 0)
215 (*info
->fprintf_func
) (info
->stream
, "r%ld", value
);
216 else if ((operand
->flags
& PPC_OPERAND_FPR
) != 0)
217 (*info
->fprintf_func
) (info
->stream
, "f%ld", value
);
218 else if ((operand
->flags
& PPC_OPERAND_VR
) != 0)
219 (*info
->fprintf_func
) (info
->stream
, "v%ld", value
);
220 else if ((operand
->flags
& PPC_OPERAND_RELATIVE
) != 0)
221 (*info
->print_address_func
) (memaddr
+ value
, info
);
222 else if ((operand
->flags
& PPC_OPERAND_ABSOLUTE
) != 0)
223 (*info
->print_address_func
) ((bfd_vma
) value
& 0xffffffff, info
);
224 else if ((operand
->flags
& PPC_OPERAND_CR
) == 0
225 || (dialect
& PPC_OPCODE_PPC
) == 0)
226 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
229 if (operand
->bits
== 3)
230 (*info
->fprintf_func
) (info
->stream
, "cr%d", value
);
233 static const char *cbnames
[4] = { "lt", "gt", "eq", "so" };
239 (*info
->fprintf_func
) (info
->stream
, "4*cr%d", cr
);
244 (*info
->fprintf_func
) (info
->stream
, "+");
245 (*info
->fprintf_func
) (info
->stream
, "%s", cbnames
[cc
]);
252 (*info
->fprintf_func
) (info
->stream
, ")");
256 if ((operand
->flags
& PPC_OPERAND_PARENS
) == 0)
260 (*info
->fprintf_func
) (info
->stream
, "(");
265 /* We have found and printed an instruction; return. */
269 /* We could not find a match. */
270 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
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