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
|
// Test that the function return is (not) converted into a jump to the thunk
// when the `-Zfunction-return={keep,thunk-extern}` flag is (not) set.
//@ revisions: unset keep thunk-extern keep-thunk-extern thunk-extern-keep
//@ assembly-output: emit-asm
//@ compile-flags: -O
//@ [keep] compile-flags: -Zfunction-return=keep
//@ [thunk-extern] compile-flags: -Zfunction-return=thunk-extern
//@ [keep-thunk-extern] compile-flags: -Zfunction-return=keep -Zfunction-return=thunk-extern
//@ [thunk-extern-keep] compile-flags: -Zfunction-return=thunk-extern -Zfunction-return=keep
//@ only-x86_64
//@ ignore-x86_64-apple-darwin Symbol is called `___x86_return_thunk` (Darwin's extra underscore)
//@ ignore-sgx Tests incompatible with LVI mitigations
#![crate_type = "lib"]
// CHECK-LABEL: foo:
#[no_mangle]
pub unsafe fn foo() {
// unset: ret
// unset-NOT: jmp __x86_return_thunk
// keep: ret
// keep-NOT: jmp __x86_return_thunk
// thunk-extern: jmp __x86_return_thunk
// thunk-extern-NOT: ret
// keep-thunk-extern: jmp __x86_return_thunk
// keep-thunk-extern-NOT: ret
// thunk-extern-keep: ret
// thunk-extern-keep-NOT: jmp __x86_return_thunk
}
|
