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
|
lw $t0, 0($t0)
addu $t0, $t0, $t3
lw $t0, 0($t0)
#ifdef OF_PIC
beqz $t0, 1f
#else
beqz $t0, \not_found
#endif
move $v0, $t0
jr $ra
0:
#ifdef OF_PIC
addiu $v0, $t9, nil_method-\name
#else
la $v0, nil_method
#endif
jr $ra
#ifdef OF_PIC
1:
lui $gp, %hi(_gp_disp)
addiu $gp, $gp, %lo(_gp_disp)
addu $gp, $gp, $t9
addiu $gp, $gp, 1b-\name
lw $t9, %call16(\not_found)($gp)
jr $t9
#endif
.Ltagged_pointer_\name:
#ifdef OF_PIC
0:
lui $gp, %hi(_gp_disp)
addiu $gp, $gp, %lo(_gp_disp)
addu $gp, $gp, $t9
addiu $gp, $gp, 0b-\name
lw $t0, %got(objc_tagged_pointer_secret)($gp)
#else
la $t0, objc_tagged_pointer_secret
#endif
lw $t0, 0($t0)
xor $t0, $a0, $t0
and $t0, $t0, 0xE
sll $t0, $t0, 1
#ifdef OF_PIC
lw $t1, %got(objc_tagged_pointer_classes)($gp)
#else
la $t1, objc_tagged_pointer_classes
#endif
addu $t0, $t1, $t0
ld $t0, ($t0)
ld $t0, 32($t0)
b .Lmain_\name
.type \name, %function
.size \name, .-\name
.endm
.macro generate_lookup_super name lookup
\name:
move $t0, $a0
lw $a0, 0($a0)
beqz $a0, 0f
lw $t0, 4($t0)
lw $t0, 32($t0)
addiu $t9, $t9, \lookup-\name
b .Lmain_\lookup
0:
#ifdef OF_PIC
addiu $v0, $t9, nil_method-\name
#else
la $v0, nil_method
#endif
jr $ra
.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
nil_method:
move $v0, $zero
jr $ra
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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
|
lw $t0, 0($t0)
addu $t0, $t0, $t3
lw $t0, 0($t0)
#ifdef OF_PIC
beqz $t0, 1f
#else
beqz $t0, \notFound
#endif
move $v0, $t0
jr $ra
0:
#ifdef OF_PIC
addiu $v0, $t9, nilMethod-\name
#else
la $v0, nilMethod
#endif
jr $ra
#ifdef OF_PIC
1:
lui $gp, %hi(_gp_disp)
addiu $gp, $gp, %lo(_gp_disp)
addu $gp, $gp, $t9
addiu $gp, $gp, 1b-\name
lw $t9, %call16(\notFound)($gp)
jr $t9
#endif
.LtaggedPointer_\name:
#ifdef OF_PIC
0:
lui $gp, %hi(_gp_disp)
addiu $gp, $gp, %lo(_gp_disp)
addu $gp, $gp, $t9
addiu $gp, $gp, 0b-\name
lw $t0, %got(objc_taggedPointerSecret)($gp)
#else
la $t0, objc_taggedPointerSecret
#endif
lw $t0, 0($t0)
xor $t0, $a0, $t0
and $t0, $t0, 0xE
sll $t0, $t0, 1
#ifdef OF_PIC
lw $t1, %got(objc_taggedPointerClasses)($gp)
#else
la $t1, objc_taggedPointerClasses
#endif
addu $t0, $t1, $t0
ld $t0, ($t0)
ld $t0, 32($t0)
b .Lmain_\name
.type \name, %function
.size \name, .-\name
.endm
.macro GENERATE_LOOKUP_SUPER name lookup
\name:
move $t0, $a0
lw $a0, 0($a0)
beqz $a0, 0f
lw $t0, 4($t0)
lw $t0, 32($t0)
addiu $t9, $t9, \lookup-\name
b .Lmain_\lookup
0:
#ifdef OF_PIC
addiu $v0, $t9, nilMethod-\name
#else
la $v0, nilMethod
#endif
jr $ra
.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
nilMethod:
move $v0, $zero
jr $ra
#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif
|