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
|
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
|
-
-
-
-
+
+
-
-
+
+
-
+
-
-
+
+
-
-
-
+
+
+
-
+
-
-
-
-
+
+
+
+
-
-
-
-
-
-
-
+
+
+
+
+
+
+
-
+
-
+
-
-
-
-
+
+
+
+
-
-
-
+
+
+
-
+
-
+
-
-
-
+
+
+
-
+
-
-
+
+
-
-
+
+
-
+
-
-
+
+
-
-
-
+
+
+
-
+
-
-
-
-
+
+
+
+
-
-
-
-
-
-
-
+
+
+
+
+
+
+
-
+
-
+
-
-
-
-
+
+
+
+
-
-
-
+
+
+
-
+
-
+
-
-
-
+
+
+
-
+
-
-
+
+
-
-
+
+
-
+
-
-
+
+
-
-
-
+
+
+
-
+
|
* file.
*/
#include "config.h"
#include "platform.h"
.intel_syntax noprefix
push ebp
mov ebp, esp
pushl %ebp
movl %esp, %ebp
push ebx
sub esp, 20
pushl %ebx
subl $20, %esp
call .LgetEIP
add ebx, offset _GLOBAL_OFFSET_TABLE_
addl $_GLOBAL_OFFSET_TABLE_, %ebx
mov eax, [ebp + 8]
mov [esp], eax
movl 8(%ebp), %eax
movl %eax, (%esp)
call object_getClass@PLT
mov [esp], eax
lea eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], eax
movl %eax, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %eax
movl %eax, 4(%esp)
call class_respondsToSelector@PLT
test eax, eax
testl %eax, %eax
jz 0f
mov eax, [ebp + 8]
mov [esp], eax
lea eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], eax
movl 8(%ebp), %eax
movl %eax, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %eax
movl %eax, 4(%esp)
call objc_msg_lookup@PLT
mov edx, [ebp + 8]
mov [esp], edx
lea edx, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], edx
mov edx, [ebp + 12]
mov [esp + 8], edx
call eax
movl 8(%ebp), %edx
movl %edx, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %edx
movl %edx, 4(%esp)
movl 12(%ebp), %edx
movl %edx, 8(%esp)
call *%eax
test eax, eax
testl %eax, %eax
jz 0f
cmp eax, [ebp + 8]
cmpl 8(%ebp), %eax
je 0f
mov [ebp + 8], eax
mov [esp], eax
mov eax, [ebp + 12]
mov [esp + 4], eax
movl %eax, 8(%ebp)
movl %eax, (%esp)
movl 12(%ebp), %eax
movl %eax, 4(%esp)
call objc_msg_lookup@PLT
add esp, 20
pop ebx
pop ebp
addl $20, %esp
popl %ebx
popl %ebp
jmp eax
jmp *%eax
0:
mov eax, [ebx + OFMethodNotFound@GOT]
movl OFMethodNotFound@GOT(%ebx), %eax
add esp, 20
pop ebx
pop ebp
addl $20, %esp
popl %ebx
popl %ebp
jmp eax
jmp *%eax
.type OFForward, %function
.size OFForward, .-OFForward
OFForward_stret:
push ebp
mov ebp, esp
pushl %ebp
movl %esp, %ebp
push ebx
sub esp, 20
pushl %ebx
subl $20, %esp
call .LgetEIP
add ebx, offset _GLOBAL_OFFSET_TABLE_
addl $_GLOBAL_OFFSET_TABLE_, %ebx
mov eax, [ebp + 12]
mov [esp], eax
movl 12(%ebp), %eax
movl %eax, (%esp)
call object_getClass@PLT
mov [esp], eax
lea eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], eax
movl %eax, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %eax
movl %eax, 4(%esp)
call class_respondsToSelector@PLT
test eax, eax
testl %eax, %eax
jz 0f
mov eax, [ebp + 12]
mov [esp], eax
lea eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], eax
movl 12(%ebp), %eax
movl %eax, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %eax
movl %eax, 4(%esp)
call objc_msg_lookup@PLT
mov edx, [ebp + 12]
mov [esp], edx
lea edx, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
mov [esp + 4], edx
mov edx, [ebp + 16]
mov [esp + 8], edx
call eax
movl 12(%ebp), %edx
movl %edx, (%esp)
leal .Lsel_forwardingTargetForSelector_@GOTOFF(%ebx), %edx
movl %edx, 4(%esp)
movl 16(%ebp), %edx
movl %edx, 8(%esp)
call *%eax
test eax, eax
testl %eax, %eax
jz 0f
cmp eax, [ebp + 12]
cmpl 12(%ebp), %eax
je 0f
mov [ebp + 12], eax
mov [esp], eax
mov eax, [ebp + 16]
mov [esp + 4], eax
movl %eax, 12(%ebp)
movl %eax, (%esp)
movl 16(%ebp), %eax
movl %eax, 4(%esp)
call objc_msg_lookup_stret@PLT
add esp, 20
pop ebx
pop ebp
addl $20, %esp
popl %ebx
popl %ebp
jmp eax
jmp *%eax
0:
mov eax, [ebx + OFMethodNotFound_stret@GOT]
movl OFMethodNotFound_stret@GOT(%ebx), %eax
add esp, 20
pop ebx
pop ebp
addl $20, %esp
popl %ebx
popl %ebp
jmp eax
jmp *%eax
.type OFForward_stret, %function
.size OFForward_stret, .-OFForward_stret
.Linit:
push ebp
mov ebp, esp
pushl %ebp
movl %esp, %ebp
push ebx
sub esp, 4
pushl %ebx
subl $4, %esp
call .LgetEIP
add ebx, offset _GLOBAL_OFFSET_TABLE_
addl $_GLOBAL_OFFSET_TABLE_, %ebx
lea eax, [ebx + .Lmodule@GOTOFF]
mov [esp], eax
leal .Lmodule@GOTOFF(%ebx), %eax
movl %eax, (%esp)
call __objc_exec_class@PLT
add esp, 4
pop ebx
pop ebp
addl $4, %esp
popl %ebx
popl %ebp
ret
.LgetEIP:
mov ebx, [esp]
movl (%esp), %ebx
ret
#ifdef OF_SOLARIS
.section .init_array, "aw"
#else
.section .ctors, "aw", %progbits
#endif
|