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/*
* Test execution of DC CVAP instruction.
*
* Copyright (c) 2023 Zhuojia Shen <chaosdefinition@hotmail.com>
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <asm/hwcap.h>
#include <sys/auxv.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef HWCAP_DCPOP
#define HWCAP_DCPOP (1 << 16)
#endif
bool should_fail = false;
static void signal_handler(int sig, siginfo_t *si, void *data)
{
ucontext_t *uc = (ucontext_t *)data;
if (should_fail) {
uc->uc_mcontext.pc += 4;
} else {
exit(EXIT_FAILURE);
}
}
static int do_dc_cvap(void)
{
struct sigaction sa = {
.sa_flags = SA_SIGINFO,
.sa_sigaction = signal_handler,
};
sigemptyset(&sa.sa_mask);
if (sigaction(SIGSEGV, &sa, NULL) < 0) {
perror("sigaction");
return EXIT_FAILURE;
}
asm volatile("dc cvap, %0\n\t" :: "r"(&sa));
should_fail = true;
asm volatile("dc cvap, %0\n\t" :: "r"(NULL));
should_fail = false;
return EXIT_SUCCESS;
}
int main(void)
{
if (getauxval(AT_HWCAP) & HWCAP_DCPOP) {
return do_dc_cvap();
} else {
printf("SKIP: no HWCAP_DCPOP on this system\n");
return EXIT_SUCCESS;
}
}
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