1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/* pj-dis.c -- Disassemble picoJava instructions.
Copyright (C) 1999-2017 Free Software Foundation, Inc.
Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com).
This file is part of the GNU opcodes library.
This library is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "opcode/pj.h"
#include "dis-asm.h"
extern const pj_opc_info_t pj_opc_info[512];
static int
get_int (bfd_vma memaddr, int *iptr, struct disassemble_info *info)
{
unsigned char ival[4];
int status = info->read_memory_func (memaddr, ival, 4, info);
*iptr = (ival[0] << 24)
| (ival[1] << 16)
| (ival[2] << 8)
| (ival[3] << 0);
return status;
}
int
print_insn_pj (bfd_vma addr, struct disassemble_info *info)
{
fprintf_ftype fprintf_fn = info->fprintf_func;
void *stream = info->stream;
unsigned char opcode;
int status;
if ((status = info->read_memory_func (addr, &opcode, 1, info)))
goto fail;
if (opcode == 0xff)
{
unsigned char byte_2;
if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info)))
goto fail;
fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].u.name);
return 2;
}
else
{
char *sep = "\t";
int insn_start = addr;
const pj_opc_info_t *op = &pj_opc_info[opcode];
int a;
addr++;
fprintf_fn (stream, "%s", op->u.name);
/* The tableswitch instruction is followed by the default
address, low value, high value and the destinations. */
if (strcmp (op->u.name, "tableswitch") == 0)
{
int lowval;
int highval;
int val;
addr = (addr + 3) & ~3;
if ((status = get_int (addr, &val, info)))
goto fail;
fprintf_fn (stream, " default: ");
(*info->print_address_func) (val + insn_start, info);
addr += 4;
if ((status = get_int (addr, &lowval, info)))
goto fail;
addr += 4;
if ((status = get_int (addr, &highval, info)))
goto fail;
addr += 4;
while (lowval <= highval)
{
if ((status = get_int (addr, &val, info)))
goto fail;
fprintf_fn (stream, " %d:[", lowval);
(*info->print_address_func) (val + insn_start, info);
fprintf_fn (stream, " ]");
addr += 4;
lowval++;
}
return addr - insn_start;
}
/* The lookupswitch instruction is followed by the default
address, element count and pairs of values and
addresses. */
if (strcmp (op->u.name, "lookupswitch") == 0)
{
int count;
int val;
addr = (addr + 3) & ~3;
if ((status = get_int (addr, &val, info)))
goto fail;
addr += 4;
fprintf_fn (stream, " default: ");
(*info->print_address_func) (val + insn_start, info);
if ((status = get_int (addr, &count, info)))
goto fail;
addr += 4;
while (count--)
{
if ((status = get_int (addr, &val, info)))
goto fail;
addr += 4;
fprintf_fn (stream, " %d:[", val);
if ((status = get_int (addr, &val, info)))
goto fail;
addr += 4;
(*info->print_address_func) (val + insn_start, info);
fprintf_fn (stream, " ]");
}
return addr - insn_start;
}
for (a = 0; op->arg[a]; a++)
{
unsigned char data[4];
int val = 0;
int i;
int size = ASIZE (op->arg[a]);
if ((status = info->read_memory_func (addr, data, size, info)))
goto fail;
val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1;
for (i = 0; i < size; i++)
val = (val << 8) | (data[i] & 0xff);
if (PCREL (op->arg[a]))
(*info->print_address_func) (val + insn_start, info);
else
fprintf_fn (stream, "%s%d", sep, val);
sep = ",";
addr += size;
}
return op->len;
}
fail:
info->memory_error_func (status, addr, info);
return -1;
}
|
