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// -*- 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;
}
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