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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020 ARM Limited
#include <sys/auxv.h>
#include <signal.h>
#include <setjmp.h>
#include "../../kselftest_harness.h"
#include "helper.h"
#define ASSERT_PAUTH_ENABLED() \
do { \
unsigned long hwcaps = getauxval(AT_HWCAP); \
/* data key instructions are not in NOP space. This prevents a SIGILL */ \
ASSERT_NE(0, hwcaps & HWCAP_PACA) TH_LOG("PAUTH not enabled"); \
} while (0)
sigjmp_buf jmpbuf;
void pac_signal_handler(int signum, siginfo_t *si, void *uc)
{
if (signum == SIGSEGV || signum == SIGILL)
siglongjmp(jmpbuf, 1);
}
/* check that a corrupted PAC results in SIGSEGV or SIGILL */
TEST(corrupt_pac)
{
struct sigaction sa;
ASSERT_PAUTH_ENABLED();
if (sigsetjmp(jmpbuf, 1) == 0) {
sa.sa_sigaction = pac_signal_handler;
sa.sa_flags = SA_SIGINFO | SA_RESETHAND;
sigemptyset(&sa.sa_mask);
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGILL, &sa, NULL);
pac_corruptor();
ASSERT_TRUE(0) TH_LOG("SIGSEGV/SIGILL signal did not occur");
}
}
TEST_HARNESS_MAIN
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