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
|
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
|
-
+
-
+
-
+
-
+
-
+
-
+
-
+
|
.globl _objc_msg_lookup_super_stret
.section .text
.macro GENERATE_LOOKUP name notFound
\name:
mov edx, [esp + 4]
test edx, edx
jz short .LreturnNilMethod
jz .LreturnNilMethod
test dl, 1
jnz short .LtaggedPointer_\name
jnz .LtaggedPointer_\name
mov edx, [edx]
mov edx, [edx + 32]
.Lmain_\name:
mov eax, [esp + 8]
#ifdef OF_SELUID24
movzx ecx, byte ptr [eax + 2]
mov edx, [edx + 4 * ecx]
#endif
movzx ecx, byte ptr [eax + 1]
mov edx, [edx + 4 * ecx]
movzx ecx, byte ptr [eax]
mov eax, [edx + 4 * ecx]
test eax, eax
jz short \notFound
jz \notFound
ret
.LtaggedPointer_\name:
xor edx, _objc_taggedPointerSecret
and dl, 0xE
movzx edx, dl
mov edx, [_objc_taggedPointerClasses + 2 * edx]
mov edx, [edx + 32]
jmp short .Lmain_\name
jmp .Lmain_\name
.def \name
.scl 2
.type 32
.endef
.endm
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
mov edx, [esp + 4]
mov eax, [edx]
test eax, eax
jz short .LreturnNilMethod
jz .LreturnNilMethod
mov [esp + 4], eax
mov edx, [edx + 4]
mov edx, [edx + 4]
mov edx, [edx + 32]
jmp short .Lmain_\lookup
jmp .Lmain_\lookup
.def \name
.scl 2
.type 32
.endef
.endm
GENERATE_LOOKUP _objc_msg_lookup _objc_methodNotFound
|