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 if ((info
->mach
== bfd_mach_ppc_e500
)
57 || (info
->disassembler_options
58 && ( strcmp (info
->disassembler_options
, "e500") == 0
59 || strcmp (info
->disassembler_options
, "e500x2") == 0)))
61 dialect
|= PPC_OPCODE_BOOKE
62 | PPC_OPCODE_SPE
| PPC_OPCODE_ISEL
63 | PPC_OPCODE_EFS
| PPC_OPCODE_BRLOCK
64 | PPC_OPCODE_PMR
| PPC_OPCODE_CACHELCK
66 /* efs* and AltiVec conflict. */
67 dialect
&= ~PPC_OPCODE_ALTIVEC
;
70 if (info
->disassembler_options
71 && (strcmp (info
->disassembler_options
, "efs") == 0))
73 dialect
|= PPC_OPCODE_EFS
;
74 /* efs* and AltiVec conflict. */
75 dialect
&= ~PPC_OPCODE_ALTIVEC
;
78 dialect
|= (PPC_OPCODE_403
| PPC_OPCODE_601
| PPC_OPCODE_CLASSIC
81 if (info
->disassembler_options
82 && strcmp (info
->disassembler_options
, "power4") == 0)
83 dialect
|= PPC_OPCODE_POWER4
;
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
;
96 /* Print a big endian PowerPC instruction. */
99 print_insn_big_powerpc (memaddr
, info
)
101 struct disassemble_info
*info
;
103 return print_insn_powerpc (memaddr
, info
, 1, powerpc_dialect(info
));
106 /* Print a little endian PowerPC instruction. */
109 print_insn_little_powerpc (memaddr
, info
)
111 struct disassemble_info
*info
;
113 return print_insn_powerpc (memaddr
, info
, 0, powerpc_dialect(info
));
116 /* Print a POWER (RS/6000) instruction. */
119 print_insn_rs6000 (memaddr
, info
)
121 struct disassemble_info
*info
;
123 return print_insn_powerpc (memaddr
, info
, 1, PPC_OPCODE_POWER
);
126 /* Print a PowerPC or POWER instruction. */
129 print_insn_powerpc (memaddr
, info
, bigendian
, dialect
)
131 struct disassemble_info
*info
;
138 const struct powerpc_opcode
*opcode
;
139 const struct powerpc_opcode
*opcode_end
;
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
;
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 if ((dialect
& PPC_OPCODE_EFS
) && (opcode
->flags
& PPC_OPCODE_ALTIVEC
))
182 /* Make two passes over the operands. First see if any of them
183 have extraction functions, and, if they do, make sure the
184 instruction is valid. */
186 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
188 operand
= powerpc_operands
+ *opindex
;
189 if (operand
->extract
)
190 (*operand
->extract
) (insn
, dialect
, &invalid
);
195 /* The instruction is valid. */
196 (*info
->fprintf_func
) (info
->stream
, "%s", opcode
->name
);
197 if (opcode
->operands
[0] != 0)
198 (*info
->fprintf_func
) (info
->stream
, "\t");
200 /* Now extract and print the operands. */
203 for (opindex
= opcode
->operands
; *opindex
!= 0; opindex
++)
207 operand
= powerpc_operands
+ *opindex
;
209 /* Operands that are marked FAKE are simply ignored. We
210 already made sure that the extract function considered
211 the instruction to be valid. */
212 if ((operand
->flags
& PPC_OPERAND_FAKE
) != 0)
215 /* Extract the value from the instruction. */
216 if (operand
->extract
)
217 value
= (*operand
->extract
) (insn
, dialect
, (int *) NULL
);
220 value
= (insn
>> operand
->shift
) & ((1 << operand
->bits
) - 1);
221 if ((operand
->flags
& PPC_OPERAND_SIGNED
) != 0
222 && (value
& (1 << (operand
->bits
- 1))) != 0)
223 value
-= 1 << operand
->bits
;
226 /* If the operand is optional, and the value is zero, don't
228 if ((operand
->flags
& PPC_OPERAND_OPTIONAL
) != 0
229 && (operand
->flags
& PPC_OPERAND_NEXT
) == 0
235 (*info
->fprintf_func
) (info
->stream
, ",");
239 /* Print the operand as directed by the flags. */
240 if ((operand
->flags
& PPC_OPERAND_GPR
) != 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 /* We could not find a match. */
291 (*info
->fprintf_func
) (info
->stream
, ".long 0x%lx", insn
);
297 print_ppc_disassembler_options (FILE * stream
)
299 fprintf (stream
, "\n\
300 The following PPC specific disassembler options are supported for use with\n\
303 fprintf (stream
, " booke|booke32|booke64 Disassemble the BookE instructions\n");
304 fprintf (stream
, " e500|e500x2 Disassemble the e500 instructions\n");
305 fprintf (stream
, " efs Disassemble the EFS instructions\n");
306 fprintf (stream
, " power4 Disassemble the Power4 instructions\n");
307 fprintf (stream
, " 32 Do not disassemble 64-bit instructions\n");
308 fprintf (stream
, " 64 Allow disassembly of 64-bit instructions\n");
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