53 lines
3.2 KiB
LLVM
53 lines
3.2 KiB
LLVM
; RUN: llc -mtriple=x86_64-unknown-unknown -x86-indirect-branch-tracking < %s | FileCheck %s
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; This test verify the handling of ''nocf_check'' attribute by the backend. ;;
|
|
;; The file was generated using the following C code: ;;
|
|
;; ;;
|
|
;; void __attribute__((nocf_check)) NoCfCheckFunc(void) {} ;;
|
|
;; ;;
|
|
;; typedef void(*FuncPointer)(void); ;;
|
|
;; void NoCfCheckCall(FuncPointer f) { ;;
|
|
;; __attribute__((nocf_check)) FuncPointer p = f; ;;
|
|
;; (*p)(); ;;
|
|
;; NoCfCheckFunc(); ;;
|
|
;; } ;;
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
; Make sure that a function with ''nocf_check'' attribute is not instrumented
|
|
; with endbr instruction at the beginning.
|
|
define void @NoCfCheckFunc() #0 {
|
|
; CHECK-LABEL: NoCfCheckFunc
|
|
; CHECK-NOT: endbr64
|
|
; CHECK: retq
|
|
entry:
|
|
ret void
|
|
}
|
|
|
|
; Ensure the notrack prefix is added before an indirect call using a pointer
|
|
; with ''nocf_check'' attribute. Also ensure a direct call to a function with
|
|
; the ''nocf_check'' attribute is correctly generated without notrack prefix.
|
|
define void @NoCfCheckCall(void ()* %f) #1 {
|
|
; CHECK-LABEL: NoCfCheckCall
|
|
; CHECK: notrack call
|
|
; CHECK: callq NoCfCheckFunc
|
|
entry:
|
|
%f.addr = alloca void ()*, align 4
|
|
%p = alloca void ()*, align 4
|
|
store void ()* %f, void ()** %f.addr, align 4
|
|
%0 = load void ()*, void ()** %f.addr, align 4
|
|
store void ()* %0, void ()** %p, align 4
|
|
%1 = load void ()*, void ()** %p, align 4
|
|
call void %1() #2
|
|
call void @NoCfCheckFunc() #2
|
|
ret void
|
|
}
|
|
|
|
attributes #0 = { nocf_check noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #2 = { nocf_check }
|
|
|
|
!llvm.module.flags = !{!0}
|
|
|
|
!0 = !{i32 4, !"cf-protection-branch", i32 1}
|