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
|
/* Self tests for disassembler for GDB, the GNU debugger.
Copyright (C) 2017-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "disasm.h"
#include "gdbsupport/selftest.h"
#include "selftest-arch.h"
#include "gdbarch.h"
namespace selftests {
/* Test disassembly of one instruction. */
static void
print_one_insn_test (struct gdbarch *gdbarch)
{
size_t len = 0;
const gdb_byte *insn = NULL;
switch (gdbarch_bfd_arch_info (gdbarch)->arch)
{
case bfd_arch_bfin:
/* M3.L = 0xe117 */
static const gdb_byte bfin_insn[] = {0x17, 0xe1, 0xff, 0xff};
insn = bfin_insn;
len = sizeof (bfin_insn);
break;
case bfd_arch_arm:
/* mov r0, #0 */
static const gdb_byte arm_insn[] = {0x0, 0x0, 0xa0, 0xe3};
insn = arm_insn;
len = sizeof (arm_insn);
break;
case bfd_arch_ia64:
case bfd_arch_mep:
case bfd_arch_mips:
case bfd_arch_tic6x:
case bfd_arch_xtensa:
return;
case bfd_arch_s390:
/* nopr %r7 */
static const gdb_byte s390_insn[] = {0x07, 0x07};
insn = s390_insn;
len = sizeof (s390_insn);
break;
case bfd_arch_xstormy16:
/* nop */
static const gdb_byte xstormy16_insn[] = {0x0, 0x0};
insn = xstormy16_insn;
len = sizeof (xstormy16_insn);
break;
case bfd_arch_arc:
/* PR 21003 */
if (gdbarch_bfd_arch_info (gdbarch)->mach == bfd_mach_arc_arc601)
return;
/* fall through */
case bfd_arch_nios2:
case bfd_arch_score:
case bfd_arch_riscv:
/* nios2, riscv, and score need to know the current instruction
to select breakpoint instruction. Give the breakpoint
instruction kind explicitly. */
{
int bplen;
insn = gdbarch_sw_breakpoint_from_kind (gdbarch, 4, &bplen);
len = bplen;
}
break;
default:
{
/* Test disassemble breakpoint instruction. */
CORE_ADDR pc = 0;
int kind = gdbarch_breakpoint_kind_from_pc (gdbarch, &pc);
int bplen;
insn = gdbarch_sw_breakpoint_from_kind (gdbarch, kind, &bplen);
len = bplen;
break;
}
}
SELF_CHECK (len > 0);
/* Test gdb_disassembler for a given gdbarch by reading data from a
pre-allocated buffer. If you want to see the disassembled
instruction printed to gdb_stdout, set verbose to true. */
static const bool verbose = false;
class gdb_disassembler_test : public gdb_disassembler
{
public:
explicit gdb_disassembler_test (struct gdbarch *gdbarch,
const gdb_byte *insn,
size_t len)
: gdb_disassembler (gdbarch,
(verbose ? gdb_stdout : &null_stream),
gdb_disassembler_test::read_memory),
m_insn (insn), m_len (len)
{
}
int
print_insn (CORE_ADDR memaddr)
{
if (verbose)
{
fprintf_unfiltered (stream (), "%s ",
gdbarch_bfd_arch_info (arch ())->arch_name);
}
int len = gdb_disassembler::print_insn (memaddr);
if (verbose)
fprintf_unfiltered (stream (), "\n");
return len;
}
private:
/* A buffer contain one instruction. */
const gdb_byte *m_insn;
/* Length of the buffer. */
size_t m_len;
static int read_memory (bfd_vma memaddr, gdb_byte *myaddr,
unsigned int len, struct disassemble_info *info)
{
gdb_disassembler_test *self
= static_cast<gdb_disassembler_test *>(info->application_data);
/* The disassembler in opcodes may read more data than one
instruction. Supply infinite consecutive copies
of the same instruction. */
for (size_t i = 0; i < len; i++)
myaddr[i] = self->m_insn[(memaddr + i) % self->m_len];
return 0;
}
};
gdb_disassembler_test di (gdbarch, insn, len);
SELF_CHECK (di.print_insn (0) == len);
}
/* Test disassembly on memory error. */
static void
memory_error_test (struct gdbarch *gdbarch)
{
class gdb_disassembler_test : public gdb_disassembler
{
public:
gdb_disassembler_test (struct gdbarch *gdbarch)
: gdb_disassembler (gdbarch, &null_stream,
gdb_disassembler_test::read_memory)
{
}
static int read_memory (bfd_vma memaddr, gdb_byte *myaddr,
unsigned int len,
struct disassemble_info *info)
{
/* Always return an error. */
return -1;
}
};
gdb_disassembler_test di (gdbarch);
bool saw_memory_error = false;
try
{
di.print_insn (0);
}
catch (const gdb_exception_error &ex)
{
if (ex.error == MEMORY_ERROR)
saw_memory_error = true;
}
/* Expect MEMORY_ERROR. */
SELF_CHECK (saw_memory_error);
}
} // namespace selftests
void _initialize_disasm_selftests ();
void
_initialize_disasm_selftests ()
{
selftests::register_test_foreach_arch ("print_one_insn",
selftests::print_one_insn_test);
selftests::register_test_foreach_arch ("memory_error",
selftests::memory_error_test);
}
|
