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
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include "debug.h"
#include "tests/tests.h"
#include "arch-tests.h"
#include "intel-pt-decoder/insn.h"
#include "intel-pt-decoder/intel-pt-insn-decoder.h"
struct test_data {
u8 data[MAX_INSN_SIZE];
int expected_length;
int expected_rel;
const char *expected_op_str;
const char *expected_branch_str;
const char *asm_rep;
};
struct test_data test_data_32[] = {
#include "insn-x86-dat-32.c"
{{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee \trdpkru"},
{{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef \twrpkru"},
{{0}, 0, 0, NULL, NULL, NULL},
};
struct test_data test_data_64[] = {
#include "insn-x86-dat-64.c"
{{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee \trdpkru"},
{{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef \twrpkru"},
{{0}, 0, 0, NULL, NULL, NULL},
};
static int get_op(const char *op_str)
{
struct val_data {
const char *name;
int val;
} vals[] = {
{"other", INTEL_PT_OP_OTHER},
{"call", INTEL_PT_OP_CALL},
{"ret", INTEL_PT_OP_RET},
{"jcc", INTEL_PT_OP_JCC},
{"jmp", INTEL_PT_OP_JMP},
{"loop", INTEL_PT_OP_LOOP},
{"iret", INTEL_PT_OP_IRET},
{"int", INTEL_PT_OP_INT},
{"syscall", INTEL_PT_OP_SYSCALL},
{"sysret", INTEL_PT_OP_SYSRET},
{NULL, 0},
};
struct val_data *val;
if (!op_str || !strlen(op_str))
return 0;
for (val = vals; val->name; val++) {
if (!strcmp(val->name, op_str))
return val->val;
}
pr_debug("Failed to get op\n");
return -1;
}
static int get_branch(const char *branch_str)
{
struct val_data {
const char *name;
int val;
} vals[] = {
{"no_branch", INTEL_PT_BR_NO_BRANCH},
{"indirect", INTEL_PT_BR_INDIRECT},
{"conditional", INTEL_PT_BR_CONDITIONAL},
{"unconditional", INTEL_PT_BR_UNCONDITIONAL},
{NULL, 0},
};
struct val_data *val;
if (!branch_str || !strlen(branch_str))
return 0;
for (val = vals; val->name; val++) {
if (!strcmp(val->name, branch_str))
return val->val;
}
pr_debug("Failed to get branch\n");
return -1;
}
static int test_data_item(struct test_data *dat, int x86_64)
{
struct intel_pt_insn intel_pt_insn;
struct insn insn;
int op, branch;
insn_init(&insn, dat->data, MAX_INSN_SIZE, x86_64);
insn_get_length(&insn);
if (!insn_complete(&insn)) {
pr_debug("Failed to decode: %s\n", dat->asm_rep);
return -1;
}
if (insn.length != dat->expected_length) {
pr_debug("Failed to decode length (%d vs expected %d): %s\n",
insn.length, dat->expected_length, dat->asm_rep);
return -1;
}
op = get_op(dat->expected_op_str);
branch = get_branch(dat->expected_branch_str);
if (intel_pt_get_insn(dat->data, MAX_INSN_SIZE, x86_64, &intel_pt_insn)) {
pr_debug("Intel PT failed to decode: %s\n", dat->asm_rep);
return -1;
}
if ((int)intel_pt_insn.op != op) {
pr_debug("Failed to decode 'op' value (%d vs expected %d): %s\n",
intel_pt_insn.op, op, dat->asm_rep);
return -1;
}
if ((int)intel_pt_insn.branch != branch) {
pr_debug("Failed to decode 'branch' value (%d vs expected %d): %s\n",
intel_pt_insn.branch, branch, dat->asm_rep);
return -1;
}
if (intel_pt_insn.rel != dat->expected_rel) {
pr_debug("Failed to decode 'rel' value (%#x vs expected %#x): %s\n",
intel_pt_insn.rel, dat->expected_rel, dat->asm_rep);
return -1;
}
pr_debug("Decoded ok: %s\n", dat->asm_rep);
return 0;
}
static int test_data_set(struct test_data *dat_set, int x86_64)
{
struct test_data *dat;
int ret = 0;
for (dat = dat_set; dat->expected_length; dat++) {
if (test_data_item(dat, x86_64))
ret = -1;
}
return ret;
}
/**
* test__insn_x86 - test x86 instruction decoder - new instructions.
*
* This function implements a test that decodes a selection of instructions and
* checks the results. The Intel PT function that further categorizes
* instructions (i.e. intel_pt_get_insn()) is also checked.
*
* The instructions are originally in insn-x86-dat-src.c which has been
* processed by scripts gen-insn-x86-dat.sh and gen-insn-x86-dat.awk to produce
* insn-x86-dat-32.c and insn-x86-dat-64.c which are included into this program.
* i.e. to add new instructions to the test, edit insn-x86-dat-src.c, run the
* gen-insn-x86-dat.sh script, make perf, and then run the test.
*
* If the test passes %0 is returned, otherwise %-1 is returned. Use the
* verbose (-v) option to see all the instructions and whether or not they
* decoded successfuly.
*/
int test__insn_x86(struct test *test __maybe_unused, int subtest __maybe_unused)
{
int ret = 0;
if (test_data_set(test_data_32, 0))
ret = -1;
if (test_data_set(test_data_64, 1))
ret = -1;
return ret;
}
|
