Add missing VDSO_{NAME,HASH}_* macros and use them for PREPARE_VERSION_KNOWN

Define all currently used Linux versions used for
PREPARE_VERSION{,_KNOWN} in sysdeps/unix/sysv/linux/dl-vdso.h and use
them instead of duplicating the versions and precomputed hashes across
architecture specific files.

	* sysdeps/unix/sysv/linux/aarch64/gettimeofday.c (INIT_ARCH): Use
	PREPARE_VERSION_KNOWN.
	* sysdeps/unix/sysv/linux/aarch64/init-first.c: Likewise.
	* sysdeps/unix/sysv/linux/dl-vdso.h (VDSO_NAME_LINUX_2_6_39): New
	define.
	(VDSO_HASH_LINUX_2_6_39): Likewise.
	(VDSO_NAME_LINUX_4_9): Likewise.
	(VDSO_HASH_LINUX_4_9): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c (INIT_ARCH): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/init-first.c
	(_libc_vdso_platform_setup): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/time.c (INIT_ARCH): Likewise.
	* sysdeps/unix/sysv/linux/s390/init-first.c (_libc_vdso_platform_setup):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/init-first.c (__vdso_platform_setup):
	Likewise.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

9 files changed, 34 insertions, 11 deletions

diff --git a/ChangeLog b/ChangeLog
index d09b70b287..0833ead403 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,22 @@
+2019-06-21  Tobias Klauser  <tklauser@distanz.ch>
+
+	* sysdeps/unix/sysv/linux/aarch64/gettimeofday.c (INIT_ARCH): Use
+	PREPARE_VERSION_KNOWN.
+	* sysdeps/unix/sysv/linux/aarch64/init-first.c: Likewise.
+	* sysdeps/unix/sysv/linux/dl-vdso.h (VDSO_NAME_LINUX_2_6_39): New
+	define.
+	(VDSO_HASH_LINUX_2_6_39): Likewise.
+	(VDSO_NAME_LINUX_4_9): Likewise.
+	(VDSO_HASH_LINUX_4_9): Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/gettimeofday.c (INIT_ARCH): Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/init-first.c
+	(_libc_vdso_platform_setup): Likewise.
+	* sysdeps/unix/sysv/linux/powerpc/time.c (INIT_ARCH): Likewise.
+	* sysdeps/unix/sysv/linux/s390/init-first.c (_libc_vdso_platform_setup):
+	Likewise.
+	* sysdeps/unix/sysv/linux/x86_64/init-first.c (__vdso_platform_setup):
+	Likewise.
+
 2019-06-20  Mike Crowe  <mac@mcrowe.com>
 
 	* nptl/eintr.c: Use libsupport.
diff --git a/sysdeps/unix/sysv/linux/aarch64/gettimeofday.c b/sysdeps/unix/sysv/linux/aarch64/gettimeofday.c
index 6c008ed935..9180b50bf7 100644
--- a/sysdeps/unix/sysv/linux/aarch64/gettimeofday.c
+++ b/sysdeps/unix/sysv/linux/aarch64/gettimeofday.c
@@ -38,13 +38,13 @@ __gettimeofday_vsyscall (struct timeval *tv, struct timezone *tz)
   return INLINE_VSYSCALL (gettimeofday, 2, tv, tz);
 }
 
-/* PREPARE_VERSION will need an __LP64__ ifdef when ILP32 support
+/* PREPARE_VERSION_KNOWN will need an __LP64__ ifdef when ILP32 support
    goes in.  See _libc_vdso_platform_setup in
    sysdeps/unix/sysv/linux/aarch64/init-first.c.  */
 
 # undef INIT_ARCH
 # define INIT_ARCH() \
-	   PREPARE_VERSION (linux_version, "LINUX_2.6.39", 123718537); \
+	   PREPARE_VERSION_KNOWN (linux_version, LINUX_2_6_39); \
 	   void *vdso_gettimeofday = \
 	     _dl_vdso_vsym ("__kernel_gettimeofday", &linux_version);
 
diff --git a/sysdeps/unix/sysv/linux/aarch64/init-first.c b/sysdeps/unix/sysv/linux/aarch64/init-first.c
index ce7319f3c9..80f7ed91ef 100644
--- a/sysdeps/unix/sysv/linux/aarch64/init-first.c
+++ b/sysdeps/unix/sysv/linux/aarch64/init-first.c
@@ -27,9 +27,9 @@ static inline void
 _libc_vdso_platform_setup (void)
 {
 #ifdef __LP64__
-  PREPARE_VERSION (linux_version, "LINUX_2.6.39", 123718537);
+  PREPARE_VERSION_KNOWN (linux_version, LINUX_2_6_39);
 #else
-  PREPARE_VERSION (linux_version, "LINUX_4.9", 61765625);
+  PREPARE_VERSION_KNOWN (linux_version, LINUX_4_9);
 #endif
 
   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux_version);
diff --git a/sysdeps/unix/sysv/linux/dl-vdso.h b/sysdeps/unix/sysv/linux/dl-vdso.h
index 50ee29067d..9e61ca7423 100644
--- a/sysdeps/unix/sysv/linux/dl-vdso.h
+++ b/sysdeps/unix/sysv/linux/dl-vdso.h
@@ -44,6 +44,10 @@
 #define VDSO_HASH_LINUX_2_6_15	123718565
 #define VDSO_NAME_LINUX_2_6_29	"LINUX_2.6.29"
 #define VDSO_HASH_LINUX_2_6_29	123718585
+#define VDSO_NAME_LINUX_2_6_39	"LINUX_2.6.39"
+#define VDSO_HASH_LINUX_2_6_39	123718537
+#define VDSO_NAME_LINUX_4_9	"LINUX_4.9"
+#define VDSO_HASH_LINUX_4_9	61765625
 #define VDSO_NAME_LINUX_4_15	"LINUX_4.15"
 #define VDSO_HASH_LINUX_4_15	182943605
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c b/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
index c8d7790d8a..463b678ad9 100644
--- a/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
+++ b/sysdeps/unix/sysv/linux/powerpc/gettimeofday.c
@@ -57,8 +57,8 @@ __gettimeofday_syscall (struct timeval *tv, struct timezone *tz)
   return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
 }
 
-# define INIT_ARCH()							\
-  PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);		\
+# define INIT_ARCH()						\
+  PREPARE_VERSION_KNOWN (linux2615, LINUX_2_6_15);		\
   void *vdso_gettimeofday = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
 
 /* If the vDSO is not available we fall back syscall.  */
diff --git a/sysdeps/unix/sysv/linux/powerpc/init-first.c b/sysdeps/unix/sysv/linux/powerpc/init-first.c
index 237b5abbf9..831f910788 100644
--- a/sysdeps/unix/sysv/linux/powerpc/init-first.c
+++ b/sysdeps/unix/sysv/linux/powerpc/init-first.c
@@ -37,7 +37,7 @@ void *VDSO_SYMBOL(sigtramp_rt32);
 static inline void
 _libc_vdso_platform_setup (void)
 {
-  PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);
+  PREPARE_VERSION_KNOWN (linux2615, LINUX_2_6_15);
 
   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2615);
   PTR_MANGLE (p);
diff --git a/sysdeps/unix/sysv/linux/powerpc/time.c b/sysdeps/unix/sysv/linux/powerpc/time.c
index c2f171b622..cb3e8b9a73 100644
--- a/sysdeps/unix/sysv/linux/powerpc/time.c
+++ b/sysdeps/unix/sysv/linux/powerpc/time.c
@@ -66,8 +66,8 @@ time_syscall (time_t *t)
   return result;
 }
 
-# define INIT_ARCH()							\
-  PREPARE_VERSION (linux2615, "LINUX_2.6.15", 123718565);		\
+# define INIT_ARCH()						\
+  PREPARE_VERSION_KNOWN (linux2615, LINUX_2_6_15);		\
   void *vdso_time = _dl_vdso_vsym ("__kernel_time", &linux2615);
 
 /* If the vDSO is not available we fall back to the syscall.  */
diff --git a/sysdeps/unix/sysv/linux/s390/init-first.c b/sysdeps/unix/sysv/linux/s390/init-first.c
index 71dd43f738..1f46e8052a 100644
--- a/sysdeps/unix/sysv/linux/s390/init-first.c
+++ b/sysdeps/unix/sysv/linux/s390/init-first.c
@@ -35,7 +35,7 @@ long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
 static inline void
 _libc_vdso_platform_setup (void)
 {
-  PREPARE_VERSION (linux2629, "LINUX_2.6.29", 123718585);
+  PREPARE_VERSION_KNOWN (linux2629, LINUX_2_6_29);
 
   void *p = _dl_vdso_vsym ("__kernel_gettimeofday", &linux2629);
   PTR_MANGLE (p);
diff --git a/sysdeps/unix/sysv/linux/x86_64/init-first.c b/sysdeps/unix/sysv/linux/x86_64/init-first.c
index 6a347becbe..85333e5ff3 100644
--- a/sysdeps/unix/sysv/linux/x86_64/init-first.c
+++ b/sysdeps/unix/sysv/linux/x86_64/init-first.c
@@ -32,7 +32,7 @@ extern __typeof (clock_gettime) __syscall_clock_gettime attribute_hidden;
 static inline void
 __vdso_platform_setup (void)
 {
-  PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
+  PREPARE_VERSION_KNOWN (linux26, LINUX_2_6);
 
   void *p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux26);
   if (p == NULL)