cfguard.ll
9.88 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
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
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
160
161
162
163
164
165
; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc | FileCheck %s
; Control Flow Guard is currently only available on Windows
; CHECK: .set @feat.00, 2048
; CHECK: .section .gfids$y
; CHECK: .symidx "?address_taken@@YAXXZ"
; CHECK: .symidx "?virt_method@Derived@@UEBAHXZ"
; ModuleID = 'cfguard.cpp'
source_filename = "cfguard.cpp"
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
%struct.Derived = type { %struct.Base }
%struct.Base = type { i32 (...)** }
%rtti.CompleteObjectLocator = type { i32, i32, i32, i32, i32, i32 }
%rtti.TypeDescriptor13 = type { i8**, i8*, [14 x i8] }
%rtti.ClassHierarchyDescriptor = type { i32, i32, i32, i32 }
%rtti.BaseClassDescriptor = type { i32, i32, i32, i32, i32, i32, i32 }
%rtti.TypeDescriptor10 = type { i8**, i8*, [11 x i8] }
$"\01??0Derived@@QEAA@XZ" = comdat any
$"\01??0Base@@QEAA@XZ" = comdat any
$"\01?virt_method@Derived@@UEBAHXZ" = comdat any
$"\01??_7Derived@@6B@" = comdat largest
$"\01??_R4Derived@@6B@" = comdat any
$"\01??_R0?AUDerived@@@8" = comdat any
$"\01??_R3Derived@@8" = comdat any
$"\01??_R2Derived@@8" = comdat any
$"\01??_R1A@?0A@EA@Derived@@8" = comdat any
$"\01??_R1A@?0A@EA@Base@@8" = comdat any
$"\01??_R0?AUBase@@@8" = comdat any
$"\01??_R3Base@@8" = comdat any
$"\01??_R2Base@@8" = comdat any
$"\01??_7Base@@6B@" = comdat largest
$"\01??_R4Base@@6B@" = comdat any
@"\01?D@@3UDerived@@A" = global %struct.Derived zeroinitializer, align 8
@0 = private unnamed_addr constant { [2 x i8*] } { [2 x i8*] [i8* bitcast (%rtti.CompleteObjectLocator* @"\01??_R4Derived@@6B@" to i8*), i8* bitcast (i32 (%struct.Derived*)* @"\01?virt_method@Derived@@UEBAHXZ" to i8*)] }, comdat($"\01??_7Derived@@6B@")
@"\01??_R4Derived@@6B@" = linkonce_odr constant %rtti.CompleteObjectLocator { i32 1, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor13* @"\01??_R0?AUDerived@@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.ClassHierarchyDescriptor* @"\01??_R3Derived@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.CompleteObjectLocator* @"\01??_R4Derived@@6B@" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0?AUDerived@@@8" = linkonce_odr global %rtti.TypeDescriptor13 { i8** @"\01??_7type_info@@6B@", i8* null, [14 x i8] c".?AUDerived@@\00" }, comdat
@__ImageBase = external constant i8
@"\01??_R3Derived@@8" = linkonce_odr constant %rtti.ClassHierarchyDescriptor { i32 0, i32 0, i32 2, i32 trunc (i64 sub nuw nsw (i64 ptrtoint ([3 x i32]* @"\01??_R2Derived@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@"\01??_R2Derived@@8" = linkonce_odr constant [3 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.BaseClassDescriptor* @"\01??_R1A@?0A@EA@Derived@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.BaseClassDescriptor* @"\01??_R1A@?0A@EA@Base@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0], comdat
@"\01??_R1A@?0A@EA@Derived@@8" = linkonce_odr constant %rtti.BaseClassDescriptor { i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor13* @"\01??_R0?AUDerived@@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 1, i32 0, i32 -1, i32 0, i32 64, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.ClassHierarchyDescriptor* @"\01??_R3Derived@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@"\01??_R1A@?0A@EA@Base@@8" = linkonce_odr constant %rtti.BaseClassDescriptor { i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor10* @"\01??_R0?AUBase@@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 0, i32 -1, i32 0, i32 64, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.ClassHierarchyDescriptor* @"\01??_R3Base@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@"\01??_R0?AUBase@@@8" = linkonce_odr global %rtti.TypeDescriptor10 { i8** @"\01??_7type_info@@6B@", i8* null, [11 x i8] c".?AUBase@@\00" }, comdat
@"\01??_R3Base@@8" = linkonce_odr constant %rtti.ClassHierarchyDescriptor { i32 0, i32 0, i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint ([2 x i32]* @"\01??_R2Base@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@"\01??_R2Base@@8" = linkonce_odr constant [2 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.BaseClassDescriptor* @"\01??_R1A@?0A@EA@Base@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0], comdat
@1 = private unnamed_addr constant { [2 x i8*] } { [2 x i8*] [i8* bitcast (%rtti.CompleteObjectLocator* @"\01??_R4Base@@6B@" to i8*), i8* bitcast (void ()* @_purecall to i8*)] }, comdat($"\01??_7Base@@6B@")
@"\01??_R4Base@@6B@" = linkonce_odr constant %rtti.CompleteObjectLocator { i32 1, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor10* @"\01??_R0?AUBase@@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.ClassHierarchyDescriptor* @"\01??_R3Base@@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.CompleteObjectLocator* @"\01??_R4Base@@6B@" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, comdat
@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_cfguard.cpp, i8* null }]
@"\01??_7Derived@@6B@" = unnamed_addr alias i8*, getelementptr inbounds ({ [2 x i8*] }, { [2 x i8*] }* @0, i32 0, i32 0, i32 1)
@"\01??_7Base@@6B@" = unnamed_addr alias i8*, getelementptr inbounds ({ [2 x i8*] }, { [2 x i8*] }* @1, i32 0, i32 0, i32 1)
; Function Attrs: noinline nounwind
define internal void @"\01??__ED@@YAXXZ"() #0 {
entry:
%call = call %struct.Derived* @"\01??0Derived@@QEAA@XZ"(%struct.Derived* @"\01?D@@3UDerived@@A") #2
ret void
}
; Function Attrs: noinline nounwind optnone
define linkonce_odr %struct.Derived* @"\01??0Derived@@QEAA@XZ"(%struct.Derived* returned %this) unnamed_addr #1 comdat align 2 {
entry:
%this.addr = alloca %struct.Derived*, align 8
store %struct.Derived* %this, %struct.Derived** %this.addr, align 8
%this1 = load %struct.Derived*, %struct.Derived** %this.addr, align 8
%0 = bitcast %struct.Derived* %this1 to %struct.Base*
%call = call %struct.Base* @"\01??0Base@@QEAA@XZ"(%struct.Base* %0) #2
%1 = bitcast %struct.Derived* %this1 to i32 (...)***
store i32 (...)** bitcast (i8** @"\01??_7Derived@@6B@" to i32 (...)**), i32 (...)*** %1, align 8
ret %struct.Derived* %this1
}
; Function Attrs: noinline nounwind optnone
define void @"\01?address_taken@@YAXXZ"() #1 {
entry:
ret void
}
; Function Attrs: noinline nounwind optnone
define void ()* @"\01?foo@@YAP6AXXZPEAUBase@@@Z"(%struct.Base* %B) #1 {
entry:
%retval = alloca void ()*, align 8
%B.addr = alloca %struct.Base*, align 8
store %struct.Base* %B, %struct.Base** %B.addr, align 8
%0 = load %struct.Base*, %struct.Base** %B.addr, align 8
%1 = bitcast %struct.Base* %0 to i32 (%struct.Base*)***
%vtable = load i32 (%struct.Base*)**, i32 (%struct.Base*)*** %1, align 8
%vfn = getelementptr inbounds i32 (%struct.Base*)*, i32 (%struct.Base*)** %vtable, i64 0
%2 = load i32 (%struct.Base*)*, i32 (%struct.Base*)** %vfn, align 8
%call = call i32 %2(%struct.Base* %0)
%tobool = icmp ne i32 %call, 0
br i1 %tobool, label %if.then, label %if.end
if.then: ; preds = %entry
store void ()* @"\01?address_taken@@YAXXZ", void ()** %retval, align 8
br label %return
if.end: ; preds = %entry
store void ()* null, void ()** %retval, align 8
br label %return
return: ; preds = %if.end, %if.then
%3 = load void ()*, void ()** %retval, align 8
ret void ()* %3
}
; Function Attrs: noinline nounwind optnone
define linkonce_odr %struct.Base* @"\01??0Base@@QEAA@XZ"(%struct.Base* returned %this) unnamed_addr #1 comdat align 2 {
entry:
%this.addr = alloca %struct.Base*, align 8
store %struct.Base* %this, %struct.Base** %this.addr, align 8
%this1 = load %struct.Base*, %struct.Base** %this.addr, align 8
%0 = bitcast %struct.Base* %this1 to i32 (...)***
store i32 (...)** bitcast (i8** @"\01??_7Base@@6B@" to i32 (...)**), i32 (...)*** %0, align 8
ret %struct.Base* %this1
}
; Function Attrs: noinline nounwind optnone
define linkonce_odr i32 @"\01?virt_method@Derived@@UEBAHXZ"(%struct.Derived* %this) unnamed_addr #1 comdat align 2 {
entry:
%this.addr = alloca %struct.Derived*, align 8
store %struct.Derived* %this, %struct.Derived** %this.addr, align 8
%this1 = load %struct.Derived*, %struct.Derived** %this.addr, align 8
ret i32 42
}
declare dllimport void @_purecall() unnamed_addr
; Function Attrs: noinline nounwind
define internal void @_GLOBAL__sub_I_cfguard.cpp() #0 {
entry:
call void @"\01??__ED@@YAXXZ"()
ret void
}
attributes #0 = { noinline nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { noinline nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind }
!llvm.module.flags = !{!0, !1}
!llvm.ident = !{!2}
!0 = !{i32 2, !"cfguard", i32 1}
!1 = !{i32 1, !"wchar_size", i32 2}
!2 = !{!"clang version 6.0.0 "}