64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
// -*- C++ -*-
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// REQUIRES: linux && target={{aarch64-.+}}
|
|
// XFAIL: no-exceptions
|
|
|
|
// This test ensures the .cfi_negate_ra_state the RA_SIGN_STATE pseudo register
|
|
// could be set directly set by a DWARF expression and the unwinder handles it
|
|
// correctly. The two directives can't be mixed in one CIE/FDE sqeuence.
|
|
|
|
#include <stdlib.h>
|
|
|
|
__attribute__((noinline, target("branch-protection=pac-ret+leaf")))
|
|
void bar() {
|
|
// ".cfi_negate_ra_state" is emitted by the compiler.
|
|
throw 1;
|
|
}
|
|
|
|
__attribute__((noinline, target("branch-protection=none")))
|
|
void foo() {
|
|
// Here a DWARF expression sets RA_SIGN_STATE.
|
|
// The LR is signed manually and stored on the stack.
|
|
asm volatile(
|
|
".cfi_escape 0x16," // DW_CFA_val_expression
|
|
"34," // REG_34(RA_SIGN_STATE)
|
|
"1," // expression_length(1)
|
|
"0x31\n" // DW_OP_lit1
|
|
"add sp, sp, 16\n" // Restore SP's value before the stack frame is
|
|
// created.
|
|
"paciasp\n" // Sign the LR.
|
|
"str lr, [sp, -0x8]\n" // Overwrite LR on the stack.
|
|
"sub sp, sp, 16\n" // Restore SP's value.
|
|
);
|
|
bar();
|
|
_Exit(-1);
|
|
}
|
|
|
|
__attribute__((noinline, target("branch-protection=pac-ret")))
|
|
void bazz() {
|
|
// ".cfi_negate_ra_state" is emitted by the compiler.
|
|
try {
|
|
foo();
|
|
} catch (int i) {
|
|
if (i == 1)
|
|
throw i;
|
|
throw 2;
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
try {
|
|
bazz();
|
|
} catch (int i) {
|
|
if (i == 1)
|
|
_Exit(0);
|
|
}
|
|
return -1;
|
|
}
|