ObjFW  Check-in [f073f79c09]

Overview
Comment:Obfuscate tagged pointers on MIPS64/ELF
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | tagged-pointers
Files: files | file ages | folders
SHA3-256: f073f79c09cf6335515cb3cf033cd0a75d97fd7d250233a1a453874d7ba2cdb1
User & Date: js on 2020-07-14 23:43:18
Other Links: branch diff | manifest | tags
Context
2020-07-18
12:54
Obfuscate tagged pointers on ARM64/ELF check-in: 01d06c0f5d user: js tags: tagged-pointers
2020-07-14
23:43
Obfuscate tagged pointers on MIPS64/ELF check-in: f073f79c09 user: js tags: tagged-pointers
2020-07-12
19:33
Obfuscate tagged pointers on SPARC64/ELF check-in: 64b88276cf user: js tags: tagged-pointers
Changes

Modified src/runtime/lookup-asm/lookup-asm-mips64-n64-elf.S from [eccb0ae4e7] to [3b31980e08].

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
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







-

+





-

+




-
-
+
+
+

+
-
-
-
-
-
+
+
+
+
+
+
+







	beqz	$t0, 1f

	move	$v0, $t0
	jr	$ra

0:
	lui	$v0, %hi(%neg(%gp_rel(\name)))
	daddu	$v0, $v0, $t9
	daddiu	$v0, $v0, %lo(%neg(%gp_rel(\name)))
	daddu	$v0, $v0, $t9
	ld	$v0, %got_disp(nil_method)($v0)
	jr	$ra

1:
	lui	$t0, %hi(%neg(%gp_rel(\name)))
	daddu	$t0, $t0, $t9
	daddiu	$t0, $t0, %lo(%neg(%gp_rel(\name)))
	daddu	$t0, $t0, $t9
	ld	$t9, %got_disp(\not_found)($t0)
	jr	$t9

.Ltagged_pointer_\name:
	and	$t0, $a0, 0xE
	dsll	$t0, $t0, 2
	lui	$t0, %hi(%neg(%gp_rel(\name)))
	daddiu	$t0, $t0, %lo(%neg(%gp_rel(\name)))
	daddu	$t0, $t0, $t9

	ld	$t1, %got_disp(objc_tagged_pointer_secret)($t0)
	lui	$t1, %hi(%neg(%gp_rel(\name)))
	daddu	$t1, $t1, $t9
	daddiu	$t1, $t1, %lo(%neg(%gp_rel(\name)))
	ld	$t1, %got_disp(objc_tagged_pointer_classes)($t1)
	daddu	$t0, $t1, $t0
	ld	$t1, 0($t1)
	xor	$t1, $a0, $t1
	and	$t1, $t1, 0xE
	dsll	$t1, $t1, 2

	ld	$t0, %got_disp(objc_tagged_pointer_classes)($t0)
	daddu	$t0, $t0, $t1
	ld	$t0, ($t0)
	ld	$t0, 64($t0)

	b	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm
111
112
113
114
115
116
117
118
119

120
121
122
123
124
125
126
115
116
117
118
119
120
121

122
123
124
125
126
127
128
129
130







-

+







	ld	$t0, 64($t0)

	daddiu	$t9, $t9, \lookup-\name
	b	.Lmain_\lookup

0:
	lui	$v0, %hi(%neg(%gp_rel(\name)))
	daddu	$v0, $v0, $t9
	daddiu	$v0, $v0, %lo(%neg(%gp_rel(\name)))
	daddu	$v0, $v0, $t9
	ld	$v0, %got_disp(nil_method)($v0)
	jr	$ra
.type \name, %function
.size \name, .-\name
.endm

generate_lookup objc_msg_lookup objc_method_not_found