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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "ujit_asm.h"
// Check that the code block contains the given sequence of bytes
void check_bytes(codeblock_t* cb, const char* bytes)
{
printf("checking encoding: %s\n", bytes);
size_t len = strlen(bytes);
assert (len % 2 == 0);
size_t num_bytes = len / 2;
if (cb->write_pos != num_bytes)
{
fprintf(stderr, "incorrect encoding length %ld, expected %ld\n", cb->write_pos, num_bytes);
exit(-1);
}
for (size_t i = 0; i < num_bytes; ++i)
{
char byte_str[] = {0, 0, 0, 0};
strncpy(byte_str, bytes + (2 * i), 2);
char* endptr;
long int byte = strtol(byte_str, &endptr, 16);
uint8_t cb_byte = cb->mem_block[i];
if (cb_byte != byte)
{
fprintf(stderr, "incorrect encoding at position %ld, got %X, expected %X\n",
i,
(int)cb_byte,
(int)byte
);
exit(-1);
}
}
}
void run_tests()
{
printf("Running assembler tests\n");
codeblock_t cb_obj;
codeblock_t* cb = &cb_obj;
cb_init(cb, 4096);
cb_write_prologue(cb);
cb_write_epilogue(cb);
// add
/*
test(
delegate void (CodeBlock cb) { cb.add(X86Opnd(CL), X86Opnd(3)); },
"80C103"
);
test(
delegate void (CodeBlock cb) { cb.add(X86Opnd(CL), X86Opnd(BL)); },
"00D9"
);
test(
delegate void (CodeBlock cb) { cb.add(X86Opnd(CL), X86Opnd(SPL)); },
"4000E1"
);
test(
delegate void (CodeBlock cb) { cb.add(X86Opnd(CX), X86Opnd(BX)); },
"6601D9"
);
*/
cb_set_pos(cb, 0); add(cb, RAX, RBX); check_bytes(cb, "4801D8");
cb_set_pos(cb, 0); add(cb, ECX, EDX); check_bytes(cb, "01D1");
cb_set_pos(cb, 0); add(cb, RDX, R14); check_bytes(cb, "4C01F2");
cb_set_pos(cb, 0); add(cb, mem_opnd(64, RAX, 0), RDX); check_bytes(cb, "480110");
cb_set_pos(cb, 0); add(cb, RDX, mem_opnd(64, RAX, 0)); check_bytes(cb, "480310");
cb_set_pos(cb, 0); add(cb, RDX, mem_opnd(64, RAX, 8)); check_bytes(cb, "48035008");
cb_set_pos(cb, 0); add(cb, RDX, mem_opnd(64, RAX, 255)); check_bytes(cb, "480390FF000000");
cb_set_pos(cb, 0); add(cb, mem_opnd(64, RAX, 127), imm_opnd(255)); check_bytes(cb, "4881407FFF000000");
cb_set_pos(cb, 0); add(cb, mem_opnd(32, RAX, 0), EDX); check_bytes(cb, "0110");
cb_set_pos(cb, 0); add(cb, RSP, imm_opnd(8)); check_bytes(cb, "4883C408");
cb_set_pos(cb, 0); add(cb, ECX, imm_opnd(8)); check_bytes(cb, "83C108");
cb_set_pos(cb, 0); add(cb, ECX, imm_opnd(255)); check_bytes(cb, "81C1FF000000");
// call
{
cb_set_pos(cb, 0);
size_t fn_label = cb_new_label(cb, "foo");
call_label(cb, fn_label);
cb_link_labels(cb);
check_bytes(cb, "E8FBFFFFFF");
}
cb_set_pos(cb, 0); call(cb, RAX); check_bytes(cb, "FFD0");
cb_set_pos(cb, 0); call(cb, mem_opnd(64, RSP, 8)); check_bytes(cb, "FF542408");
// jcc
{
cb_set_pos(cb, 0);
size_t loop_label = cb_new_label(cb, "loop");
jge(cb, loop_label);
cb_link_labels(cb);
check_bytes(cb, "0F8DFAFFFFFF");
}
{
cb_set_pos(cb, 0);
size_t loop_label = cb_new_label(cb, "loop");
jo(cb, loop_label);
cb_link_labels(cb);
check_bytes(cb, "0F80FAFFFFFF");
}
// jmp with RM operand
cb_set_pos(cb, 0); jmp_rm(cb, R12); check_bytes(cb, "41FFE4");
// lea
//cb_set_pos(cb, 0); lea(cb, EBX, mem_opnd(32, RSP, 4)); check_bytes(cb, "8D5C2404");
cb_set_pos(cb, 0); lea(cb, RDX, mem_opnd(64, RCX, 8)); check_bytes(cb, "488D5108");
// mov
cb_set_pos(cb, 0); mov(cb, EAX, imm_opnd(7)); check_bytes(cb, "B807000000");
cb_set_pos(cb, 0); mov(cb, EAX, imm_opnd(-3)); check_bytes(cb, "B8FDFFFFFF");
cb_set_pos(cb, 0); mov(cb, R15, imm_opnd(3)); check_bytes(cb, "49BF0300000000000000");
cb_set_pos(cb, 0); mov(cb, EAX, EBX); check_bytes(cb, "89D8");
cb_set_pos(cb, 0); mov(cb, EAX, ECX); check_bytes(cb, "89C8");
cb_set_pos(cb, 0); mov(cb, EDX, mem_opnd(32, RBX, 128)); check_bytes(cb, "8B9380000000");
/*
test(
delegate void (CodeBlock cb) { cb.mov(X86Opnd(AL), X86Opnd(8, RCX, 0, 1, RDX)); },
"8A0411"
);
test(
delegate void (CodeBlock cb) { cb.mov(X86Opnd(CL), X86Opnd(R9L)); },
"4488C9"
);
*/
cb_set_pos(cb, 0); mov(cb, RBX, RAX); check_bytes(cb, "4889C3");
cb_set_pos(cb, 0); mov(cb, RDI, RBX); check_bytes(cb, "4889DF");
/*
test(
delegate void (CodeBlock cb) { cb.mov(X86Opnd(SIL), X86Opnd(11)); },
"40B60B"
);
*/
cb_set_pos(cb, 0); mov(cb, mem_opnd(8, RSP, 0), imm_opnd(-3)); check_bytes(cb, "C60424FD");
// nop
cb_set_pos(cb, 0); nop(cb, 1); check_bytes(cb, "90");
// pop
cb_set_pos(cb, 0); pop(cb, RAX); check_bytes(cb, "58");
cb_set_pos(cb, 0); pop(cb, RBX); check_bytes(cb, "5B");
cb_set_pos(cb, 0); pop(cb, RSP); check_bytes(cb, "5C");
cb_set_pos(cb, 0); pop(cb, RBP); check_bytes(cb, "5D");
cb_set_pos(cb, 0); pop(cb, R12); check_bytes(cb, "415C");
// push
cb_set_pos(cb, 0); push(cb, RAX); check_bytes(cb, "50");
cb_set_pos(cb, 0); push(cb, RBX); check_bytes(cb, "53");
cb_set_pos(cb, 0); push(cb, R12); check_bytes(cb, "4154");
// ret
cb_set_pos(cb, 0); ret(cb); check_bytes(cb, "C3");
// sal
/*
test(
delegate void (CodeBlock cb) { cb.sal(X86Opnd(CX), X86Opnd(1)); },
"66D1E1"
);
*/
cb_set_pos(cb, 0); sal(cb, ECX, imm_opnd(1)); check_bytes(cb, "D1E1");
cb_set_pos(cb, 0); sal(cb, EBP, imm_opnd(5)); check_bytes(cb, "C1E505");
cb_set_pos(cb, 0); sal(cb, mem_opnd(32, RSP, 68), imm_opnd(1)); check_bytes(cb, "D1642444");
// sar
cb_set_pos(cb, 0); sar(cb, EDX, imm_opnd(1)); check_bytes(cb, "D1FA");
// shr
cb_set_pos(cb, 0); shr(cb, R14, imm_opnd(7)); check_bytes(cb, "49C1EE07");
/*
// sqrtsd
test(
delegate void (CodeBlock cb) { cb.sqrtsd(X86Opnd(XMM2), X86Opnd(XMM6)); },
"F20F51D6"
);
*/
// sub
cb_set_pos(cb, 0); sub(cb, EAX, imm_opnd(1)); check_bytes(cb, "83E801");
cb_set_pos(cb, 0); sub(cb, RAX, imm_opnd(2)); check_bytes(cb, "4883E802");
printf("Assembler tests done\n");
}
int main(int argc, char** argv)
{
run_tests();
return 0;
}
|
