| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2019 ARM Limited |
| * |
| * Try to mangle the ucontext from inside a signal handler, mangling the |
| * DAIF bits in an illegal manner: 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 when it checks |
| * the sigframe consistency in valid_user_regs() routine. |
| */ |
| uc->uc_mcontext.pstate |= PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT; |
| |
| return 1; |
| } |
| |
| struct tdescr tde = { |
| .sanity_disabled = true, |
| .name = "MANGLE_PSTATE_INVALID_DAIF_BITS", |
| .descr = "Mangling uc_mcontext with INVALID DAIF_BITS", |
| .sig_trig = SIGUSR1, |
| .sig_ok = SIGSEGV, |
| .run = mangle_invalid_pstate_run, |
| }; |