| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2019 ARM Limited |
| * |
| * Try to mangle the ucontext from inside a signal handler, toggling |
| * the execution state bit: this attempt must be spotted by Kernel and |
| * the test case is expected to be terminated via SEGV. |
| */ |
| |
| #include "test_signals_utils.h" |
| #include "testcases.h" |
| |
| static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si, |
| ucontext_t *uc) |
| { |
| ASSERT_GOOD_CONTEXT(uc); |
| |
| /* This config should trigger a SIGSEGV by Kernel */ |
| uc->uc_mcontext.pstate ^= PSR_MODE32_BIT; |
| |
| return 1; |
| } |
| |
| struct tdescr tde = { |
| .sanity_disabled = true, |
| .name = "MANGLE_PSTATE_INVALID_STATE_TOGGLE", |
| .descr = "Mangling uc_mcontext with INVALID STATE_TOGGLE", |
| .sig_trig = SIGUSR1, |
| .sig_ok = SIGSEGV, |
| .run = mangle_invalid_pstate_run, |
| }; |