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authorJessica Clarke <jrtc27@FreeBSD.org>2021-07-05 15:16:53 +0000
committerJessica Clarke <jrtc27@FreeBSD.org>2021-07-05 15:16:53 +0000
commit348c41d1815dc2e872a1deba1f4bf760caaa1094 (patch)
tree1ade320155a44c90dc9bc14cbf4a7cd8ea009c2c /lib/libc
parentaf433832f7520840c22edd1fe1266c1a5cb781ad (diff)
downloadsrc-348c41d1815dc2e872a1deba1f4bf760caaa1094.tar.gz
src-348c41d1815dc2e872a1deba1f4bf760caaa1094.zip
riscv: Implement non-stub __vdso_gettc and __vdso_gettimekeep
PR: 256905 Reviewed by: arichardson, mhorne MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D30963
Diffstat (limited to 'lib/libc')
-rw-r--r--lib/libc/riscv/sys/Makefile.inc2
-rw-r--r--lib/libc/riscv/sys/__vdso_gettc.c56
2 files changed, 57 insertions, 1 deletions
diff --git a/lib/libc/riscv/sys/Makefile.inc b/lib/libc/riscv/sys/Makefile.inc
index 0e94e6652645..b322cece382c 100644
--- a/lib/libc/riscv/sys/Makefile.inc
+++ b/lib/libc/riscv/sys/Makefile.inc
@@ -1,6 +1,6 @@
# $FreeBSD$
-SRCS+= trivial-vdso_tc.c
+SRCS+= __vdso_gettc.c
MDASM= cerror.S \
syscall.S \
diff --git a/lib/libc/riscv/sys/__vdso_gettc.c b/lib/libc/riscv/sys/__vdso_gettc.c
new file mode 100644
index 000000000000..20e69a791bb5
--- /dev/null
+++ b/lib/libc/riscv/sys/__vdso_gettc.c
@@ -0,0 +1,56 @@
+/*-
+ * Copyright (c) 2021 Jessica Clarke
+ *
+ * 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/types.h>
+#include <sys/elf.h>
+#include <sys/time.h>
+#include <sys/vdso.h>
+
+#include <machine/riscvreg.h>
+
+#include <errno.h>
+
+#include "libc_private.h"
+
+#pragma weak __vdso_gettc
+int
+__vdso_gettc(const struct vdso_timehands *th, u_int *tc)
+{
+ if (th->th_algo != VDSO_TH_ALGO_RISCV_RDTIME)
+ return (ENOSYS);
+
+ *tc = csr_read(time);
+ return (0);
+}
+
+#pragma weak __vdso_gettimekeep
+int
+__vdso_gettimekeep(struct vdso_timekeep **tk)
+{
+ return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk)));
+}