mirror of
https://github.com/golang/go
synced 2024-11-15 01:20:28 -07:00
1eb0465fa5
Fixes #57097 Change-Id: I6ab659abbca1ae0ac8710674d39aec116fab0baa Reviewed-on: https://go-review.googlesource.com/c/go/+/455336 Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Keith Randall <khr@golang.org>
43 lines
578 B
Go
43 lines
578 B
Go
// +build amd64
|
|
// asmcheck -gcflags=-spectre=ret
|
|
|
|
package codegen
|
|
|
|
func CallFunc(f func()) {
|
|
// amd64:`CALL\truntime.retpoline`
|
|
f()
|
|
}
|
|
|
|
func CallInterface(x interface{ M() }) {
|
|
// amd64:`CALL\truntime.retpoline`
|
|
x.M()
|
|
}
|
|
|
|
// Check to make sure that jump tables are disabled
|
|
// when retpoline is on. See issue 57097.
|
|
func noJumpTables(x int) int {
|
|
switch x {
|
|
case 0:
|
|
return 0
|
|
case 1:
|
|
return 1
|
|
case 2:
|
|
return 2
|
|
case 3:
|
|
return 3
|
|
case 4:
|
|
return 4
|
|
case 5:
|
|
return 5
|
|
case 6:
|
|
return 6
|
|
case 7:
|
|
return 7
|
|
case 8:
|
|
return 8
|
|
case 9:
|
|
return 9
|
|
}
|
|
return 10
|
|
}
|