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/*
* Check decoding of SEGV_PKUERR.
*
* 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>
#if defined HAVE_SIGINFO_T_SI_PKEY && defined SEGV_PKUERR
# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
# include <sys/mman.h>
static void
handler(int sig, siginfo_t *info, void *ucontext)
{
if (info->si_code != SEGV_PKUERR)
error_msg_and_skip("SIGSEGV: si_code = %d", info->si_code);
printf("--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_PKUERR"
", si_addr=%p, si_pkey=%u} ---\n",
info->si_addr, info->si_pkey);
exit(0);
}
int
main(void) {
int *p = mmap(NULL, get_page_size(), PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (p == MAP_FAILED)
perror_msg_and_fail("mmap");
const struct sigaction act = {
.sa_sigaction = handler,
.sa_flags = SA_SIGINFO | SA_RESETHAND
};
if (sigaction(SIGSEGV, &act, NULL))
perror_msg_and_fail("sigaction");
__asm__ volatile("":: "r" (*p));
error_msg_and_skip("PROT_EXEC page is readable");
}
#else
SKIP_MAIN_UNDEFINED("HAVE_SIGINFO_T_SI_PKEY && SEGV_PKUERR")
#endif
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