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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* Disassemble SPU instructions
Copyright (C) 2006-2017 Free Software Foundation, Inc.
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 file; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#include "disassemble.h"
#include "opcode/spu.h"
/* This file provides a disassembler function which uses
the disassembler interface defined in dis-asm.h. */
extern const struct spu_opcode spu_opcodes[];
extern const int spu_num_opcodes;
static const struct spu_opcode *spu_disassemble_table[(1<<11)];
static void
init_spu_disassemble (void)
{
int i;
/* If two instructions have the same opcode then we prefer the first
* one. In most cases it is just an alternate mnemonic. */
for (i = 0; i < spu_num_opcodes; i++)
{
int o = spu_opcodes[i].opcode;
if (o >= (1 << 11))
abort ();
if (spu_disassemble_table[o] == 0)
spu_disassemble_table[o] = &spu_opcodes[i];
}
}
/* Determine the instruction from the 10 least significant bits. */
static const struct spu_opcode *
get_index_for_opcode (unsigned int insn)
{
const struct spu_opcode *op_index;
unsigned int opcode = insn >> (32-11);
/* Init the table. This assumes that element 0/opcode 0 (currently
* NOP) is always used */
if (spu_disassemble_table[0] == 0)
init_spu_disassemble ();
if ((op_index = spu_disassemble_table[opcode & 0x780]) != 0
&& op_index->insn_type == RRR)
return op_index;
if ((op_index = spu_disassemble_table[opcode & 0x7f0]) != 0
&& (op_index->insn_type == RI18 || op_index->insn_type == LBT))
return op_index;
if ((op_index = spu_disassemble_table[opcode & 0x7f8]) != 0
&& op_index->insn_type == RI10)
return op_index;
if ((op_index = spu_disassemble_table[opcode & 0x7fc]) != 0
&& (op_index->insn_type == RI16))
return op_index;
if ((op_index = spu_disassemble_table[opcode & 0x7fe]) != 0
&& (op_index->insn_type == RI8))
return op_index;
if ((op_index = spu_disassemble_table[opcode & 0x7ff]) != 0)
return op_index;
return 0;
}
/* Print a Spu instruction. */
int
print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
{
bfd_byte buffer[4];
int value;
int hex_value;
int status;
unsigned int insn;
const struct spu_opcode *op_index;
enum spu_insns tag;
status = (*info->read_memory_func) (memaddr, buffer, 4, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
insn = bfd_getb32 (buffer);
op_index = get_index_for_opcode (insn);
if (op_index == 0)
{
(*info->fprintf_func) (info->stream, ".long 0x%x", insn);
}
else
{
int i;
int paren = 0;
tag = (enum spu_insns)(op_index - spu_opcodes);
(*info->fprintf_func) (info->stream, "%s", op_index->mnemonic);
if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
|| tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
|| tag == M_SYNC || tag == M_HBR)
{
int fb = (insn >> (32-18)) & 0x7f;
if (fb & 0x40)
(*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p");
if (fb & 0x20)
(*info->fprintf_func) (info->stream, "d");
if (fb & 0x10)
(*info->fprintf_func) (info->stream, "e");
}
if (op_index->arg[0] != 0)
(*info->fprintf_func) (info->stream, "\t");
hex_value = 0;
for (i = 1; i <= op_index->arg[0]; i++)
{
int arg = op_index->arg[i];
if (arg != A_P && !paren && i > 1)
(*info->fprintf_func) (info->stream, ",");
switch (arg)
{
case A_T:
(*info->fprintf_func) (info->stream, "$%d",
DECODE_INSN_RT (insn));
break;
case A_A:
(*info->fprintf_func) (info->stream, "$%d",
DECODE_INSN_RA (insn));
break;
case A_B:
(*info->fprintf_func) (info->stream, "$%d",
DECODE_INSN_RB (insn));
break;
case A_C:
(*info->fprintf_func) (info->stream, "$%d",
DECODE_INSN_RC (insn));
break;
case A_S:
(*info->fprintf_func) (info->stream, "$sp%d",
DECODE_INSN_RA (insn));
break;
case A_H:
(*info->fprintf_func) (info->stream, "$ch%d",
DECODE_INSN_RA (insn));
break;
case A_P:
paren++;
(*info->fprintf_func) (info->stream, "(");
break;
case A_U7A:
(*info->fprintf_func) (info->stream, "%d",
173 - DECODE_INSN_U8 (insn));
break;
case A_U7B:
(*info->fprintf_func) (info->stream, "%d",
155 - DECODE_INSN_U8 (insn));
break;
case A_S3:
case A_S6:
case A_S7:
case A_S7N:
case A_U3:
case A_U5:
case A_U6:
case A_U7:
hex_value = DECODE_INSN_I7 (insn);
(*info->fprintf_func) (info->stream, "%d", hex_value);
break;
case A_S11:
(*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4,
info);
break;
case A_S11I:
(*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4,
info);
break;
case A_S10:
case A_S10B:
hex_value = DECODE_INSN_I10 (insn);
(*info->fprintf_func) (info->stream, "%d", hex_value);
break;
case A_S14:
hex_value = DECODE_INSN_I10 (insn) * 16;
(*info->fprintf_func) (info->stream, "%d", hex_value);
break;
case A_S16:
hex_value = DECODE_INSN_I16 (insn);
(*info->fprintf_func) (info->stream, "%d", hex_value);
break;
case A_X16:
hex_value = DECODE_INSN_U16 (insn);
(*info->fprintf_func) (info->stream, "%u", hex_value);
break;
case A_R18:
value = DECODE_INSN_I16 (insn) * 4;
if (value == 0)
(*info->fprintf_func) (info->stream, "%d", value);
else
{
hex_value = memaddr + value;
(*info->print_address_func) (hex_value & 0x3ffff, info);
}
break;
case A_S18:
value = DECODE_INSN_U16 (insn) * 4;
if (value == 0)
(*info->fprintf_func) (info->stream, "%d", value);
else
(*info->print_address_func) (value, info);
break;
case A_U18:
value = DECODE_INSN_U18 (insn);
if (value == 0 || !(*info->symbol_at_address_func)(0, info))
{
hex_value = value;
(*info->fprintf_func) (info->stream, "%u", value);
}
else
(*info->print_address_func) (value, info);
break;
case A_U14:
hex_value = DECODE_INSN_U14 (insn);
(*info->fprintf_func) (info->stream, "%u", hex_value);
break;
}
if (arg != A_P && paren)
{
(*info->fprintf_func) (info->stream, ")");
paren--;
}
}
if (hex_value > 16)
(*info->fprintf_func) (info->stream, "\t# %x", hex_value);
}
return 4;
}
|
