ObjFW  Diff

Differences From Artifact [e0cdb81196]:

To Artifact [a4b34307ef]:


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

.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:
	testq	%rdi, %rdi
	jz	ret_nil

	testb	$1, %dil
	jnz	.Ltagged_pointer_\name

	movq	(%rdi), %r8
	movq	64(%r8), %r8

.Lmain_\name:
	movq	(%rsi), %rax
	movzbl	%ah, %ecx
	movzbl	%al, %edx
#ifdef OF_SELUID24
	shrl	$16, %eax

	movq	(%r8,%rax,8), %r8
#endif
	movq	(%r8,%rcx,8), %r8
	movq	(%r8,%rdx,8), %rax

	testq	%rax, %rax
	jz	\not_found@PLT

	ret

.Ltagged_pointer_\name:
	movq	objc_tagged_pointer_secret@GOTPCREL(%rip), %rax
	xorq	(%rax), %rdi
	andb	$0xE, %dil
	movzbl	%dil, %r8d

	movq	objc_tagged_pointer_classes@GOTPCREL(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	64(%r8), %r8

	jmp	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm

.macro generate_lookup_super name lookup
\name:
	movq	%rdi, %r8
	movq	(%rdi), %rdi
	testq	%rdi, %rdi
	jz	ret_nil

	movq	8(%r8), %r8
	movq	64(%r8), %r8
	jmp	.Lmain_\lookup
.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:
	leaq	nil_method(%rip), %rax
	ret

nil_method:
	xorq	%rax, %rax
	ret

#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif







|


|


|

















|



|
|




|








|




|








|
|
|
|

|
|


|






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

.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:
	testq	%rdi, %rdi
	jz	returnNilMethod

	testb	$1, %dil
	jnz	.LtaggedPointer_\name

	movq	(%rdi), %r8
	movq	64(%r8), %r8

.Lmain_\name:
	movq	(%rsi), %rax
	movzbl	%ah, %ecx
	movzbl	%al, %edx
#ifdef OF_SELUID24
	shrl	$16, %eax

	movq	(%r8,%rax,8), %r8
#endif
	movq	(%r8,%rcx,8), %r8
	movq	(%r8,%rdx,8), %rax

	testq	%rax, %rax
	jz	\notFound@PLT

	ret

.LtaggedPointer_\name:
	movq	objc_taggedPointerSecret@GOTPCREL(%rip), %rax
	xorq	(%rax), %rdi
	andb	$0xE, %dil
	movzbl	%dil, %r8d

	movq	objc_taggedPointerClasses@GOTPCREL(%rip), %rax
	movq	(%rax,%r8,4), %r8
	movq	64(%r8), %r8

	jmp	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	movq	%rdi, %r8
	movq	(%rdi), %rdi
	testq	%rdi, %rdi
	jz	returnNilMethod

	movq	8(%r8), %r8
	movq	64(%r8), %r8
	jmp	.Lmain_\lookup
.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:
	leaq	nilMethod(%rip), %rax
	ret

nilMethod:
	xorq	%rax, %rax
	ret

#ifdef OF_LINUX
.section .note.GNU-stack, "", %progbits
#endif