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// 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,
};
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