1 /* pj-dis.c -- Disassemble picoJava instructions.
2 Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com).
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #include "opcode/pj.h"
24 extern const pj_opc_info_t pj_opc_info
[512];
26 static int get_int
PARAMS ((bfd_vma
, int *, struct disassemble_info
*));
30 get_int (memaddr
, iptr
, info
)
33 struct disassemble_info
*info
;
35 unsigned char ival
[4];
37 int status
= info
->read_memory_func (memaddr
, ival
, 4, info
);
39 *iptr
= (ival
[0] << 24)
48 print_insn_pj (addr
, info
)
50 struct disassemble_info
*info
;
52 fprintf_ftype fprintf_fn
= info
->fprintf_func
;
53 void *stream
= info
->stream
;
57 if ((status
= info
->read_memory_func (addr
, &opcode
, 1, info
)))
63 if ((status
= info
->read_memory_func (addr
+ 1, &byte_2
, 1, info
)))
65 fprintf_fn (stream
, "%s\t", pj_opc_info
[opcode
+ byte_2
].u
.name
);
71 int insn_start
= addr
;
72 const pj_opc_info_t
*op
= &pj_opc_info
[opcode
];
75 fprintf_fn (stream
, "%s", op
->u
.name
);
77 /* The tableswitch instruction is followed by the default
78 address, low value, high value and the destinations. */
80 if (strcmp (op
->u
.name
, "tableswitch") == 0)
86 addr
= (addr
+ 3) & ~3;
87 if ((status
= get_int (addr
, &val
, info
)))
90 fprintf_fn (stream
, " default: ");
91 (*info
->print_address_func
) (val
+ insn_start
, info
);
94 if ((status
= get_int (addr
, &lowval
, info
)))
98 if ((status
= get_int (addr
, &highval
, info
)))
102 while (lowval
<= highval
)
104 if ((status
= get_int (addr
, &val
, info
)))
106 fprintf_fn (stream
, " %d:[", lowval
);
107 (*info
->print_address_func
) (val
+ insn_start
, info
);
108 fprintf_fn (stream
, " ]");
112 return addr
- insn_start
;
115 /* The lookupswitch instruction is followed by the default
116 address, element count and pairs of values and
119 if (strcmp (op
->u
.name
, "lookupswitch") == 0)
124 addr
= (addr
+ 3) & ~3;
125 if ((status
= get_int (addr
, &val
, info
)))
129 fprintf_fn (stream
, " default: ");
130 (*info
->print_address_func
) (val
+ insn_start
, info
);
132 if ((status
= get_int (addr
, &count
, info
)))
138 if ((status
= get_int (addr
, &val
, info
)))
141 fprintf_fn (stream
, " %d:[", val
);
143 if ((status
= get_int (addr
, &val
, info
)))
147 (*info
->print_address_func
) (val
+ insn_start
, info
);
148 fprintf_fn (stream
, " ]");
150 return addr
- insn_start
;
152 for (a
= 0; op
->arg
[a
]; a
++)
154 unsigned char data
[4];
157 int size
= ASIZE (op
->arg
[a
]);
159 if ((status
= info
->read_memory_func (addr
, data
, size
, info
)))
162 val
= (UNS (op
->arg
[0]) || ((data
[0] & 0x80) == 0)) ? 0 : -1;
164 for (i
= 0; i
< size
; i
++)
165 val
= (val
<< 8) | (data
[i
] & 0xff);
167 if (PCREL (op
->arg
[a
]))
168 (*info
->print_address_func
) (val
+ insn_start
, info
);
170 fprintf_fn (stream
, "%s%d", sep
, val
);
179 info
->memory_error_func (status
, addr
, info
);