@@ -52,6 +52,7 @@ all_files := \
sys/stat.h \
sys/syscall.h \
sys/time.h \
+ sys/timerfd.h \
sys/types.h \
sys/wait.h \
time.h \
@@ -102,6 +102,7 @@
#include "sys/stat.h"
#include "sys/syscall.h"
#include "sys/time.h"
+#include "sys/timerfd.h"
#include "sys/wait.h"
#include "ctype.h"
#include "elf.h"
new file mode 100644
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * timerfd definitions for NOLIBC
+ * Copyright (C) 2025 Thomas Weißschuh <thomas.weissschuh@linutronix.de>
+ */
+
+#ifndef _NOLIBC_SYS_TIMERFD_H
+#define _NOLIBC_SYS_TIMERFD_H
+
+#include "../sys.h"
+#include "../time.h"
+
+#include <linux/timerfd.h>
+
+
+static __attribute__((unused))
+int sys_timerfd_create(int clockid, int flags)
+{
+ return my_syscall2(__NR_timerfd_create, clockid, flags);
+}
+
+static __attribute__((unused))
+int timerfd_create(int clockid, int flags)
+{
+ return __sysret(sys_timerfd_create(clockid, flags));
+}
+
+
+static __attribute__((unused))
+int sys_timerfd_gettime(int fd, struct itimerspec *curr_value)
+{
+#if defined(__NR_timerfd_gettime)
+ return my_syscall2(__NR_timerfd_gettime, fd, curr_value);
+#elif defined(__NR_timerfd_gettime64)
+ struct __kernel_itimerspec kcurr_value;
+ int ret;
+
+ ret = my_syscall2(__NR_timerfd_gettime64, fd, &kcurr_value);
+ __nolibc_timespec_kernel_to_user(&kcurr_value.it_interval, &curr_value->it_interval);
+ __nolibc_timespec_kernel_to_user(&kcurr_value.it_value, &curr_value->it_value);
+ return ret;
+#else
+ return __nolibc_enosys(__func__, fd, curr_value);
+#endif
+}
+
+static __attribute__((unused))
+int timerfd_gettime(int fd, struct itimerspec *curr_value)
+{
+ return __sysret(sys_timerfd_gettime(fd, curr_value));
+}
+
+
+static __attribute__((unused))
+int sys_timerfd_settime(int fd, int flags,
+ const struct itimerspec *new_value, struct itimerspec *old_value)
+{
+#if defined(__NR_timerfd_settime)
+ return my_syscall4(__NR_timerfd_settime, fd, flags, new_value, old_value);
+#elif defined(__NR_timerfd_settime64)
+ struct __kernel_itimerspec knew_value, kold_value;
+ int ret;
+
+ __nolibc_timespec_user_to_kernel(&new_value->it_value, &knew_value.it_value);
+ __nolibc_timespec_user_to_kernel(&new_value->it_interval, &knew_value.it_interval);
+ ret = my_syscall4(__NR_timerfd_settime64, fd, flags, &knew_value, &kold_value);
+ if (old_value) {
+ __nolibc_timespec_kernel_to_user(&kold_value.it_interval, &old_value->it_interval);
+ __nolibc_timespec_kernel_to_user(&kold_value.it_value, &old_value->it_value);
+ }
+ return ret;
+#else
+ return __nolibc_enosys(__func__, fd, flags, new_value, old_value);
+#endif
+}
+
+static __attribute__((unused))
+int timerfd_settime(int fd, int flags,
+ const struct itimerspec *new_value, struct itimerspec *old_value)
+{
+ return __sysret(sys_timerfd_settime(fd, flags, new_value, old_value));
+}
+
+/* make sure to include all global symbols */
+#include "../nolibc.h"
+
+#endif /* _NOLIBC_SYS_TIMERFD_H */
@@ -27,6 +27,7 @@
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
+#include <sys/timerfd.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <dirent.h>
@@ -952,6 +953,52 @@ int test_timer(void)
return ret;
}
+int test_timerfd(void)
+{
+ struct itimerspec timerspec;
+ int timer, ret;
+
+ timer = timerfd_create(CLOCK_MONOTONIC, 0);
+ if (timer == -1)
+ return -1;
+
+ timerspec = (struct itimerspec) {
+ .it_value.tv_sec = 1000000,
+ };
+ ret = timerfd_settime(timer, 0, &timerspec, NULL);
+ if (ret)
+ goto err;
+
+ timerspec = (struct itimerspec) {
+ .it_value.tv_sec = -1,
+ .it_value.tv_nsec = -1,
+ .it_interval.tv_sec = -1,
+ .it_interval.tv_nsec = -1,
+ };
+ ret = timerfd_gettime(timer, &timerspec);
+ if (ret)
+ goto err;
+
+ errno = EINVAL;
+ ret = -1;
+
+ if (timerspec.it_interval.tv_sec || timerspec.it_interval.tv_nsec)
+ goto err;
+
+ if (timerspec.it_value.tv_sec > 1000000)
+ goto err;
+
+ ret = close(timer);
+ if (ret)
+ return ret;
+
+ return 0;
+
+err:
+ close(timer);
+ return ret;
+}
+
int test_uname(void)
{
struct utsname buf;
@@ -1234,6 +1281,7 @@ int run_syscall(int min, int max)
CASE_TEST(stat_timestamps); EXPECT_SYSZR(1, test_stat_timestamps()); break;
CASE_TEST(symlink_root); EXPECT_SYSER(1, symlink("/", "/"), -1, EEXIST); break;
CASE_TEST(timer); EXPECT_SYSZR(1, test_timer()); break;
+ CASE_TEST(timerfd); EXPECT_SYSZR(1, test_timerfd()); break;
CASE_TEST(uname); EXPECT_SYSZR(proc, test_uname()); break;
CASE_TEST(uname_fault); EXPECT_SYSER(1, uname(NULL), -1, EFAULT); break;
CASE_TEST(unlink_root); EXPECT_SYSER(1, unlink("/"), -1, EISDIR); break;
This is used in various selftests and will be handy when integrating those with nolibc. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> --- tools/include/nolibc/Makefile | 1 + tools/include/nolibc/nolibc.h | 1 + tools/include/nolibc/sys/timerfd.h | 87 ++++++++++++++++++++++++++++ tools/testing/selftests/nolibc/nolibc-test.c | 48 +++++++++++++++ 4 files changed, 137 insertions(+)