forked from OSchip/llvm-project
47 lines
2.3 KiB
LLVM
47 lines
2.3 KiB
LLVM
|
; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+ibt -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)(); ;;
|
||
|
|
;; } ;;
|
||
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
|
||
|
|
; 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
|
||
|
|
}
|
||
|
|
|
||
|
|
; Make sure that notrack prefix is added before a call with ''nocf_check'' attribute.
|
||
|
|
define void @NoCfCheckCall(void ()* %f) {
|
||
|
|
; CHECK-LABEL: NoCfCheckCall
|
||
|
|
; CHECK: notrack call
|
||
|
|
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() #1
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
attributes #0 = { noinline nocf_check nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
||
|
|
attributes #1 = { nocf_check }
|
||
|
|
|
||
|
|
!llvm.module.flags = !{!0}
|
||
|
|
|
||
|
|
!0 = !{i32 4, !"cf-protection-branch", i32 1}
|