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
|
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -verify-machineinstrs < %s | FileCheck %s --check-prefix=ASM
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -verify-machineinstrs -stop-after=finalize-isel < %s | FileCheck %s --check-prefixes=MIR,ISEL
; RUN: llc -mtriple=x86_64-unknown-linux-gnu -verify-machineinstrs -stop-after=kcfi < %s | FileCheck %s --check-prefixes=MIR,KCFI
; ASM: .p2align 4, 0x90
; ASM: .type __cfi_f1,@function
; ASM-LABEL: __cfi_f1:
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: nop
; ASM-NEXT: movl $12345678, %eax
; ASM-LABEL: .Lcfi_func_end0:
; ASM-NEXT: .size __cfi_f1, .Lcfi_func_end0-__cfi_f1
define void @f1(ptr noundef %x) !kcfi_type !1 {
; ASM-LABEL: f1:
; ASM: # %bb.0:
; ASM: movl $4282621618, %r10d # imm = 0xFF439EB2
; ASM-NEXT: addl -4(%rdi), %r10d
; ASM-NEXT: je .Ltmp0
; ASM-NEXT: .Ltmp1:
; ASM-NEXT: ud2
; ASM-NEXT: .section .kcfi_traps,"ao",@progbits,.text
; ASM-NEXT: .Ltmp2:
; ASM-NEXT: .long .Ltmp1-.Ltmp2
; ASM-NEXT: .text
; ASM-NEXT: .Ltmp0:
; ASM-NEXT: callq *%rdi
; MIR-LABEL: name: f1
; MIR: body:
; ISEL: CALL64r %0, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, cfi-type 12345678
; KCFI: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $rdi, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: CALL64r killed $rdi, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp
; KCFI-NEXT: }
call void %x() [ "kcfi"(i32 12345678) ]
ret void
}
; ASM-NOT: __cfi_f2:
define void @f2(ptr noundef %x) {
; ASM-LABEL: f2:
; MIR-LABEL: name: f2
; MIR: body:
; ISEL: TCRETURNri64 %0, 0, csr_64, implicit $rsp, implicit $ssp, cfi-type 12345678
; KCFI: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $rdi, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: TAILJMPr64 killed $rdi, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp
; KCFI-NEXT: }
tail call void %x() [ "kcfi"(i32 12345678) ]
ret void
}
; ASM-NOT: __cfi_f3:
define void @f3(ptr noundef %x) #0 {
; ASM-LABEL: f3:
; MIR-LABEL: name: f3
; MIR: body:
; ISEL: CALL64pcrel32 &__llvm_retpoline_r11, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit killed $r11, cfi-type 12345678
; KCFI: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $r11, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: CALL64pcrel32 &__llvm_retpoline_r11, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit internal killed $r11
; KCFI-NEXT: }
call void %x() [ "kcfi"(i32 12345678) ]
ret void
}
; ASM-NOT: __cfi_f4:
define void @f4(ptr noundef %x) #0 {
; ASM-LABEL: f4:
; MIR-LABEL: name: f4
; MIR: body:
; ISEL: TCRETURNdi64 &__llvm_retpoline_r11, 0, csr_64, implicit $rsp, implicit $ssp, implicit killed $r11, cfi-type 12345678
; KCFI: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $r11, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: TAILJMPd64 &__llvm_retpoline_r11, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit internal killed $r11
; KCFI-NEXT: }
tail call void %x() [ "kcfi"(i32 12345678) ]
ret void
}
;; Ensure we emit Value + 1 for unwanted values (e.g. endbr64 == 4196274163).
; ASM-LABEL: __cfi_f5:
; ASM: movl $4196274164, %eax # imm = 0xFA1E0FF4
define void @f5(ptr noundef %x) !kcfi_type !2 {
; ASM-LABEL: f5:
; ASM: movl $98693132, %r10d # imm = 0x5E1F00C
tail call void %x() [ "kcfi"(i32 4196274163) ]
ret void
}
;; Ensure we emit Value + 1 for unwanted values (e.g. -endbr64 == 98693133).
; ASM-LABEL: __cfi_f6:
; ASM: movl $98693134, %eax # imm = 0x5E1F00E
define void @f6(ptr noundef %x) !kcfi_type !3 {
; ASM-LABEL: f6:
; ASM: movl $4196274162, %r10d # imm = 0xFA1E0FF2
tail call void %x() [ "kcfi"(i32 98693133) ]
ret void
}
@g = external local_unnamed_addr global ptr, align 8
define void @f7() {
; MIR-LABEL: name: f7
; MIR: body:
; ISEL: TCRETURNmi64 killed %0, 1, $noreg, 0, $noreg, 0, csr_64, implicit $rsp, implicit $ssp, cfi-type 12345678
; KCFI: $r11 = MOV64rm killed renamable $rax, 1, $noreg, 0, $noreg
; KCFI-NEXT: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $r11, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: TAILJMPr64 internal $r11, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp
; KCFI-NEXT: }
%1 = load ptr, ptr @g, align 8
tail call void %1() [ "kcfi"(i32 12345678) ]
ret void
}
define void @f8() {
; MIR-LABEL: name: f8
; MIR: body:
; ISEL: CALL64m killed %0, 1, $noreg, 0, $noreg, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, cfi-type 12345678
; KCFI: $r11 = MOV64rm killed renamable $rax, 1, $noreg, 0, $noreg
; KCFI-NEXT: BUNDLE{{.*}} {
; KCFI-NEXT: KCFI_CHECK $r11, 12345678, implicit-def $r10, implicit-def $r11, implicit-def $eflags
; KCFI-NEXT: CALL64r internal $r11, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp
; KCFI-NEXT: }
%1 = load ptr, ptr @g, align 8
call void %1() [ "kcfi"(i32 12345678) ]
ret void
}
attributes #0 = { "target-features"="+retpoline-indirect-branches,+retpoline-indirect-calls" }
!llvm.module.flags = !{!0}
!0 = !{i32 4, !"kcfi", i32 1}
!1 = !{i32 12345678}
!2 = !{i32 4196274163}
!3 = !{i32 98693133}
|
