19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
.globl objc_msg_lookup
.globl objc_msg_lookup_stret
.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret
.section .text
.macro generate_lookup name not_found
\name:
brz,pn %o0, ret_nil
and %o0, 1, %o2
brnz,pn %o2, .Ltagged_pointer_\name
nop
ldx [%o0], %o2
ldx [%o2 + 64], %o2
.Lmain_\name:
#ifdef OF_SELUID24
|
|
|
|
|
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
.globl objc_msg_lookup
.globl objc_msg_lookup_stret
.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret
.section .text
.macro GENERATE_LOOKUP name notFound
\name:
brz,pn %o0, returnNilMethod
and %o0, 1, %o2
brnz,pn %o2, .LtaggedPointer_\name
nop
ldx [%o0], %o2
ldx [%o2 + 64], %o2
.Lmain_\name:
#ifdef OF_SELUID24
|
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
|
nop
retl
mov %o2, %o0
0:
mov %o7, %g1
call \not_found
mov %g1, %o7
.Ltagged_pointer_\name:
#ifdef OF_PIC
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_ - 4), %o3
call 0f
or %o3, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o3
0:
add %o7, %o3, %o3
mov %g1, %o7
#endif
sethi %hi(objc_tagged_pointer_secret), %o2
or %o2, %lo(objc_tagged_pointer_secret), %o2
#ifdef OF_PIC
ldx [%o3 + %o2], %o2
#endif
ldx [%o2], %o2
xor %o0, %o2, %o0
and %o0, 0xE, %o0
sll %o0, 2, %o0
sethi %hi(objc_tagged_pointer_classes), %o2
or %o2, %lo(objc_tagged_pointer_classes), %o2
#ifdef OF_PIC
ldx [%o3 + %o2], %o2
#endif
ldx [%o2 + %o0], %o2
ba .Lmain_\name
ldx [%o2 + 64], %o2
.type \name, %function
.size \name, .-\name
.endm
.macro generate_lookup_super name lookup
\name:
mov %o0, %o2
ldx [%o0], %o0
brz,pn %o0, ret_nil
nop
ldx [%o2 + 8], %o2
ba .Lmain_\lookup
ldx [%o2 + 64], %o2
.type \name, %function
.size \name, .-\name
.endm
generate_lookup objc_msg_lookup objc_method_not_found
generate_lookup objc_msg_lookup_stret objc_method_not_found_stret
generate_lookup_super objc_msg_lookup_super objc_msg_lookup
generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret
ret_nil:
#ifdef OF_PIC
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_ - 4), %o1
call 0f
or %o1, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o1
0:
add %o7, %o1, %o1
sethi %hi(nil_method), %o0
or %o0, %lo(nil_method), %o0
jmpl %g1 + 8, %g0
ldx [%o1 + %o0], %o0
#else
sethi %hi(nil_method), %o0
retl
or %o0, %lo(nil_method), %o0
#endif
nil_method:
retl
clr %o0
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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
|
nop
retl
mov %o2, %o0
0:
mov %o7, %g1
call \notFound
mov %g1, %o7
.LtaggedPointer_\name:
#ifdef OF_PIC
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_ - 4), %o3
call 0f
or %o3, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o3
0:
add %o7, %o3, %o3
mov %g1, %o7
#endif
sethi %hi(objc_taggedPointerSecret), %o2
or %o2, %lo(objc_taggedPointerSecret), %o2
#ifdef OF_PIC
ldx [%o3 + %o2], %o2
#endif
ldx [%o2], %o2
xor %o0, %o2, %o0
and %o0, 0xE, %o0
sll %o0, 2, %o0
sethi %hi(objc_taggedPointerClasses), %o2
or %o2, %lo(objc_taggedPointerClasses), %o2
#ifdef OF_PIC
ldx [%o3 + %o2], %o2
#endif
ldx [%o2 + %o0], %o2
ba .Lmain_\name
ldx [%o2 + 64], %o2
.type \name, %function
.size \name, .-\name
.endm
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
mov %o0, %o2
ldx [%o0], %o0
brz,pn %o0, returnNilMethod
nop
ldx [%o2 + 8], %o2
ba .Lmain_\lookup
ldx [%o2 + 64], %o2
.type \name, %function
.size \name, .-\name
.endm
GENERATE_LOOKUP objc_msg_lookup objc_methodNotFound
GENERATE_LOOKUP objc_msg_lookup_stret objc_methodNotFound_stret
GENERATE_LOOKUP_SUPER objc_msg_lookup_super objc_msg_lookup
GENERATE_LOOKUP_SUPER objc_msg_lookup_super_stret objc_msg_lookup_stret
returnNilMethod:
#ifdef OF_PIC
mov %o7, %g1
sethi %hi(_GLOBAL_OFFSET_TABLE_ - 4), %o1
call 0f
or %o1, %lo(_GLOBAL_OFFSET_TABLE_ + 4), %o1
0:
add %o7, %o1, %o1
sethi %hi(nilMethod), %o0
or %o0, %lo(nilMethod), %o0
jmpl %g1 + 8, %g0
ldx [%o1 + %o0], %o0
#else
sethi %hi(nilMethod), %o0
retl
or %o0, %lo(nilMethod), %o0
#endif
nilMethod:
retl
clr %o0
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif
|