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kselftest: arm64: fake_sigreturn_misaligned_sp

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Add a simple fake_sigreturn testcase which places a valid sigframe on a
non-16 bytes aligned SP. Expects a SIGSEGV on test PASS.

Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Cristian Marussi 2019-10-25 18:57:17 +01:00 committed by Catalin Marinas
parent 49978aa8f0
commit 3f484ce375
1 changed files with 37 additions and 0 deletions
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37
tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 ARM Limited
*
* Place a fake sigframe on the stack at a misaligned SP: on sigreturn
* Kernel must spot this attempt and the test case is expected to be
* terminated via SEGV.
*/
#include <signal.h>
#include <ucontext.h>
#include "test_signals_utils.h"
#include "testcases.h"
struct fake_sigframe sf;
static int fake_sigreturn_misaligned_run(struct tdescr *td,
siginfo_t *si, ucontext_t *uc)
{
/* just to fill the ucontext_t with something real */
if (!get_current_context(td, &sf.uc))
return 1;
/* Forcing sigframe on misaligned SP (16 + 3) */
fake_sigreturn(&sf, sizeof(sf), 3);
return 1;
}
struct tdescr tde = {
.name = "FAKE_SIGRETURN_MISALIGNED_SP",
.descr = "Triggers a sigreturn with a misaligned sigframe",
.sig_ok = SIGSEGV,
.timeout = 3,
.run = fake_sigreturn_misaligned_run,
};