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
|
/* Force .data aligned to 4K, so that .got very likely gets at
0x5021a0 (0x60 bytes .tdata and 0x140 bytes .dynamic) */
.data
.balign 4096
.section ".tdata", "awT", @progbits
.globl sg1, sg2, sg3, sg4, sg5, sg6, sg7, sg8
.globl sh1, sh2, sh3, sh4, sh5, sh6, sh7, sh8
.hidden sh1, sh2, sh3, sh4, sh5, sh6, sh7, sh8
sg1: .long 17
sg2: .long 18
sg3: .long 19
sg4: .long 20
sg5: .long 21
sg6: .long 22
sg7: .long 23
sg8: .long 24
sl1: .long 65
sl2: .long 66
sl3: .long 67
sl4: .long 68
sl5: .long 69
sl6: .long 70
sl7: .long 71
sl8: .long 72
sh1: .long 257
sh2: .long 258
sh3: .long 259
sh4: .long 260
sh5: .long 261
sh6: .long 262
sh7: .long 263
sh8: .long 264
/* Force .text aligned to 4K, so it very likely gets at 0x401000. */
.text
.balign 4096
.globl fn2
.type fn2,@function
fn2:
pushq %rbp
movq %rsp, %rbp
/* GD -> IE because variable is not defined in executable */
leaq sG1@tlsdesc(%rip), %rax
call *sG1@tlscall(%rax)
nop;nop;nop;nop
/* GD -> IE because variable is not defined in executable where
the variable is referenced through IE too */
leaq sG2@tlsdesc(%rip), %rax
call *sG2@tlscall(%rax)
nop;nop;nop;nop
/* GD -> LE with global variable defined in executable */
leaq sg1@tlsdesc(%rip), %rax
call *sg1@tlscall(%rax)
nop;nop;nop;nop
/* GD -> LE with local variable defined in executable */
leaq sl1@tlsdesc(%rip), %rax
call *sl1@tlscall(%rax)
nop;nop;nop;nop
/* GD -> LE with hidden variable defined in executable */
leaq sh1@tlsdesc(%rip), %rax
call *sh1@tlscall(%rax)
nop;nop;nop;nop
/* LD -> LE */
leaq _TLS_MODULE_BASE_@tlsdesc(%rip), %rax
call *_TLS_MODULE_BASE_@tlscall(%rax)
nop;nop
leaq 1+sl1@dtpoff(%rax), %rdx
nop;nop
leaq sl2@dtpoff+2(%rax), %r9
nop;nop;nop;nop
/* LD -> LE against hidden variables */
leaq sh1@dtpoff(%rax), %rdx
nop;nop
leaq 3+sh2@dtpoff(%rax), %rcx
nop;nop;nop;nop
/* IE against global var */
movq %fs:0, %r9
nop;nop
addq sG2@gottpoff(%rip), %r9
nop;nop;nop;nop
/* IE -> LE against global var defined in exec */
movq %fs:0, %r10
nop;nop
addq sg1@gottpoff(%rip), %r10
nop;nop;nop;nop
/* IE -> LE against local var */
movq %fs:0, %rax
nop;nop
addq sl1@gottpoff(%rip), %rax
nop;nop;nop;nop
/* IE -> LE against hidden var */
movq %fs:0, %rcx
nop;nop
addq sh1@gottpoff(%rip), %rcx
nop;nop;nop;nop
/* Direct access through %fs */
/* IE against global var */
movq sG5@gottpoff(%rip), %rcx
nop;nop
movq %fs:(%rcx), %rdx
nop;nop;nop;nop
/* IE->LE against local var */
movq sl5@gottpoff(%rip), %r11
nop;nop
movq %fs:(%r11), %r12
nop;nop;nop;nop
/* IE->LE against hidden var */
movq sh5@gottpoff(%rip), %rdx
nop;nop
movq %fs:(%rdx), %rdx
nop;nop;nop;nop
leave
ret
/* IE against global var */
addq sG2@gottpoff(%rip), %r16
addq %rax, sG2@gottpoff(%rip), %r16
addq sG2@gottpoff(%rip), %rax, %r16
{nf} addq sG2@gottpoff(%rip), %r16
{nf} addq %rax, sG2@gottpoff(%rip), %r16
{nf} addq sG2@gottpoff(%rip), %rax, %r16
/* IE -> LE against global var defined in exec */
addq sg1@gottpoff(%rip), %r17
addq %r8, sg1@gottpoff(%rip), %r17
addq sg1@gottpoff(%rip), %r8, %r17
{nf} addq sg1@gottpoff(%rip), %r17
{nf} addq %r8, sg1@gottpoff(%rip), %r17
{nf} addq sg1@gottpoff(%rip), %r8, %r17
/* IE -> LE against local var */
addq sl1@gottpoff(%rip), %r18
addq %r8, sl1@gottpoff(%rip), %rax
addq sl1@gottpoff(%rip), %r8, %rax
{nf} addq sl1@gottpoff(%rip), %r18
{nf} addq %r8, sl1@gottpoff(%rip), %rax
{nf} addq sl1@gottpoff(%rip), %r8, %rax
/* IE -> LE against hidden var */
addq sh1@gottpoff(%rip), %r19
addq %r19, sh1@gottpoff(%rip), %r8
addq sh1@gottpoff(%rip), %r19, %r8
{nf} addq sh1@gottpoff(%rip), %r19
{nf} addq %r19, sh1@gottpoff(%rip), %r8
{nf} addq sh1@gottpoff(%rip), %r19, %r8
/* Direct access through %fs */
/* IE against global var */
movq sG5@gottpoff(%rip), %r20
/* IE->LE against local var */
movq sl5@gottpoff(%rip), %r21
/* IE->LE against hidden var */
movq sh5@gottpoff(%rip), %r22
/* GD -> IE because variable is not defined in executable */
leaq sG1@tlsdesc(%rip), %r16
/* GD -> IE because variable is not defined in executable where
the variable is referenced through IE too */
leaq sG2@tlsdesc(%rip), %r17
/* GD -> LE with global variable defined in executable */
leaq sg1@tlsdesc(%rip), %r18
/* GD -> LE with local variable defined in executable */
leaq sl1@tlsdesc(%rip), %r19
/* GD -> LE with hidden variable defined in executable */
leaq sh1@tlsdesc(%rip), %r20
|