aboutsummaryrefslogtreecommitdiff
path: root/lib/libc/sys
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libc/sys')
-rw-r--r--lib/libc/sys/Makefile.inc4
-rw-r--r--lib/libc/sys/__vdso_gettimeofday.c142
-rw-r--r--lib/libc/sys/clock_gettime.c52
-rw-r--r--lib/libc/sys/gettimeofday.c51
4 files changed, 249 insertions, 0 deletions
diff --git a/lib/libc/sys/Makefile.inc b/lib/libc/sys/Makefile.inc
index 61d1713193e1..df4ef4279404 100644
--- a/lib/libc/sys/Makefile.inc
+++ b/lib/libc/sys/Makefile.inc
@@ -15,6 +15,10 @@
#
.sinclude "${.CURDIR}/${LIBC_ARCH}/sys/Makefile.inc"
+SRCS+= clock_gettime.c gettimeofday.c __vdso_gettimeofday.c
+NOASM+= clock_gettime.o gettimeofday.o
+PSEUDO+= _clock_gettime.o _gettimeofday.o
+
# Sources common to both syscall interfaces:
SRCS+= stack_protector.c stack_protector_compat.c __error.c
.if !defined(WITHOUT_SYSCALL_COMPAT)
diff --git a/lib/libc/sys/__vdso_gettimeofday.c b/lib/libc/sys/__vdso_gettimeofday.c
new file mode 100644
index 000000000000..32abb6970d82
--- /dev/null
+++ b/lib/libc/sys/__vdso_gettimeofday.c
@@ -0,0 +1,142 @@
+/*-
+ * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/elf.h>
+#include <sys/time.h>
+#include <sys/vdso.h>
+#include <errno.h>
+#include <time.h>
+#include <machine/atomic.h>
+#include "libc_private.h"
+
+static u_int
+tc_delta(const struct vdso_timehands *th)
+{
+
+ return ((__vdso_gettc(th) - th->th_offset_count) &
+ th->th_counter_mask);
+}
+
+static int
+binuptime(struct bintime *bt, struct vdso_timekeep *tk, int abs)
+{
+ struct vdso_timehands *th;
+ uint32_t curr, gen;
+
+ do {
+ if (!tk->tk_enabled)
+ return (ENOSYS);
+
+ /*
+ * XXXKIB. The load of tk->tk_current should use
+ * atomic_load_acq_32 to provide load barrier. But
+ * since tk points to r/o mapped page, x86
+ * implementation of atomic_load_acq faults.
+ */
+ curr = tk->tk_current;
+ rmb();
+ th = &tk->tk_th[curr];
+ if (th->th_algo != VDSO_TH_ALGO_1)
+ return (ENOSYS);
+ gen = th->th_gen;
+ *bt = th->th_offset;
+ bintime_addx(bt, th->th_scale * tc_delta(th));
+ if (abs)
+ bintime_add(bt, &th->th_boottime);
+
+ /*
+ * Barrier for load of both tk->tk_current and th->th_gen.
+ */
+ rmb();
+ } while (curr != tk->tk_current || gen == 0 || gen != th->th_gen);
+ return (0);
+}
+
+static struct vdso_timekeep *tk;
+
+int
+__vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ struct bintime bt;
+ int error;
+
+ if (tz != NULL)
+ return (ENOSYS);
+ if (tk == NULL) {
+ error = _elf_aux_info(AT_TIMEKEEP, &tk, sizeof(tk));
+ if (error != 0 || tk == NULL)
+ return (ENOSYS);
+ }
+ if (tk->tk_ver != VDSO_TK_VER_CURR)
+ return (ENOSYS);
+ error = binuptime(&bt, tk, 1);
+ if (error != 0)
+ return (error);
+ bintime2timeval(&bt, tv);
+ return (0);
+}
+
+int
+__vdso_clock_gettime(clockid_t clock_id, struct timespec *ts)
+{
+ struct bintime bt;
+ int abs, error;
+
+ if (tk == NULL) {
+ error = _elf_aux_info(AT_TIMEKEEP, &tk, sizeof(tk));
+ if (error != 0 || tk == NULL)
+ return (ENOSYS);
+ }
+ if (tk->tk_ver != VDSO_TK_VER_CURR)
+ return (ENOSYS);
+ switch (clock_id) {
+ case CLOCK_REALTIME:
+ case CLOCK_REALTIME_PRECISE:
+ case CLOCK_REALTIME_FAST:
+ case CLOCK_SECOND:
+ abs = 1;
+ break;
+ case CLOCK_MONOTONIC:
+ case CLOCK_MONOTONIC_PRECISE:
+ case CLOCK_MONOTONIC_FAST:
+ case CLOCK_UPTIME:
+ case CLOCK_UPTIME_PRECISE:
+ case CLOCK_UPTIME_FAST:
+ abs = 0;
+ break;
+ default:
+ return (ENOSYS);
+ }
+ error = binuptime(&bt, tk, abs);
+ if (error != 0)
+ return (error);
+ bintime2timespec(&bt, ts);
+ if (clock_id == CLOCK_SECOND)
+ ts->tv_nsec = 0;
+ return (0);
+}
diff --git a/lib/libc/sys/clock_gettime.c b/lib/libc/sys/clock_gettime.c
new file mode 100644
index 000000000000..e7e701b2e509
--- /dev/null
+++ b/lib/libc/sys/clock_gettime.c
@@ -0,0 +1,52 @@
+/*-
+ * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <sys/vdso.h>
+#include <errno.h>
+#include <time.h>
+#include "libc_private.h"
+
+int __clock_gettime(clockid_t, struct timespec *ts);
+
+__weak_reference(__clock_gettime, clock_gettime);
+
+int
+__clock_gettime(clockid_t clock_id, struct timespec *ts)
+{
+ int error;
+
+ if (__vdso_clock_gettime != NULL && __vdso_gettc != NULL)
+ error = __vdso_clock_gettime(clock_id, ts);
+ else
+ error = ENOSYS;
+ if (error == ENOSYS)
+ error = __sys_clock_gettime(clock_id, ts);
+ return (error);
+}
diff --git a/lib/libc/sys/gettimeofday.c b/lib/libc/sys/gettimeofday.c
new file mode 100644
index 000000000000..4cc87e1b5281
--- /dev/null
+++ b/lib/libc/sys/gettimeofday.c
@@ -0,0 +1,51 @@
+/*-
+ * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/syscall.h>
+#include <sys/time.h>
+#include <sys/vdso.h>
+#include <errno.h>
+#include "libc_private.h"
+
+int __gettimeofday(struct timeval *tv, struct timezone *tz);
+
+__weak_reference(__gettimeofday, gettimeofday);
+
+int
+__gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ int error;
+
+ if (__vdso_gettimeofday != NULL && __vdso_gettc != NULL)
+ error = __vdso_gettimeofday(tv, tz);
+ else
+ error = ENOSYS;
+ if (error == ENOSYS)
+ error = __sys_gettimeofday(tv, tz);
+ return (error);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-25 05:32:05 +0000