[glibc] riscv: Enable VDSO for static linking

[glibc] riscv: Enable VDSO for static linking

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=27a0914e4586b06375b20731fa6515fe30334373

commit 27a0914e4586b06375b20731fa6515fe30334373
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed May 29 18:48:38 2019 -0300

    riscv: Enable VDSO for static linking
    
    Checked on riscv64-linux-gnu-rv64imafdc-lp64d qemu system with
    some static tests.
    
    	[BZ #19767]
    	* sysdeps/unix/sysv/linux/riscv/init-first.c: Remove #ifdef SHARED.
    	* sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
    	* sysdeps/unix/sysv/linux/riscv/sysdep.h (ALWAYS_USE_VSYSCALL):
    	Define.

Diff:
---
 ChangeLog                                  | 6 ++++++
 sysdeps/unix/sysv/linux/riscv/init-first.c | 8 +++-----
 sysdeps/unix/sysv/linux/riscv/libc-vdso.h  | 6 +-----
 sysdeps/unix/sysv/linux/riscv/sysdep.h     | 3 +++
 4 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bd17d9e..bd12f2d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2019-08-05  Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 
+	[BZ #19767]
+	* sysdeps/unix/sysv/linux/riscv/init-first.c: Remove #ifdef SHARED.
+	* sysdeps/unix/sysv/linux/riscv/libc-vdso.h: Likewise.
+	* sysdeps/unix/sysv/linux/riscv/sysdep.h (ALWAYS_USE_VSYSCALL):
+	Define.
+
 	* sysdeps/sh/libm-test-ulps: Update.
 
 2019-08-05  Florian Weimer  <fweimer@redhat.com>
diff --git a/sysdeps/unix/sysv/linux/riscv/init-first.c b/sysdeps/unix/sysv/linux/riscv/init-first.c
index 8134c79..98a8ce3 100644
--- a/sysdeps/unix/sysv/linux/riscv/init-first.c
+++ b/sysdeps/unix/sysv/linux/riscv/init-first.c
@@ -17,9 +17,8 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#ifdef SHARED
-# include <dl-vdso.h>
-# include <libc-vdso.h>
+#include <dl-vdso.h>
+#include <libc-vdso.h>
 
 long int (*VDSO_SYMBOL (getcpu)) (unsigned int *, unsigned int *, void *)
     attribute_hidden;
@@ -52,7 +51,6 @@ _libc_vdso_platform_setup (void)
   VDSO_SYMBOL (clock_getres) = p;
 }
 
-# define VDSO_SETUP _libc_vdso_platform_setup
-#endif
+#define VDSO_SETUP _libc_vdso_platform_setup
 
 #include <csu/init-first.c>
diff --git a/sysdeps/unix/sysv/linux/riscv/libc-vdso.h b/sysdeps/unix/sysv/linux/riscv/libc-vdso.h
index b0c46f3..2373292 100644
--- a/sysdeps/unix/sysv/linux/riscv/libc-vdso.h
+++ b/sysdeps/unix/sysv/linux/riscv/libc-vdso.h
@@ -20,9 +20,7 @@
 #ifndef _LIBC_VDSO_H
 #define _LIBC_VDSO_H
 
-#ifdef SHARED
-
-# include <sysdep-vdso.h>
+#include <sysdep-vdso.h>
 
 extern long int (*VDSO_SYMBOL (getcpu)) (unsigned int *, unsigned int *, void *)
     attribute_hidden;
@@ -33,6 +31,4 @@ extern long int (*VDSO_SYMBOL (clock_gettime)) (clockid_t, struct timespec *)
 extern long int (*VDSO_SYMBOL (clock_getres)) (clockid_t, struct timespec *)
     attribute_hidden;
 
-#endif
-
 #endif /* _LIBC_VDSO_H */
diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.h b/sysdeps/unix/sysv/linux/riscv/sysdep.h
index 5470ea3..caf013a 100644
--- a/sysdeps/unix/sysv/linux/riscv/sysdep.h
+++ b/sysdeps/unix/sysv/linux/riscv/sysdep.h
@@ -19,6 +19,9 @@
 #ifndef _LINUX_RISCV_SYSDEP_H
 #define _LINUX_RISCV_SYSDEP_H 1
 
+/* Always enable vsyscalls on riscv */
+#define ALWAYS_USE_VSYSCALL 1
+
 #include <sysdeps/unix/sysv/linux/generic/sysdep.h>
 #include <tls.h>