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/*
* Check decoding of SEGV_ACCERR.
*
* Copyright (c) 2022 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <signal.h>
#ifdef SEGV_ACCERR
# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
# include <sys/mman.h>
static void
handler(int sig)
{
_exit(0);
}
int
main(void) {
int *p = mmap(NULL, get_page_size(), PROT_NONE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED)
perror_msg_and_fail("mmap");
const struct sigaction act = {
.sa_handler = handler,
.sa_flags = SA_RESETHAND
};
if (sigaction(SIGSEGV, &act, NULL))
perror_msg_and_fail("sigaction");
printf("--- SIGSEGV {si_signo=SIGSEGV"
", si_code=SEGV_ACCERR, si_addr=%p} ---\n", p);
fflush(stdout);
__asm__ volatile("":: "r" (*p));
error_msg_and_skip("PROT_NONE page is readable");
}
#else
SKIP_MAIN_UNDEFINED("SEGV_ACCERR")
#endif
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