Consolidate vDSO macros and usage

This patch consolidate the Linux vDSO define and usage across all ports
that uses it.  The common vDSO definitions and calling through
{INLINE/INTERNAL}_VSYSCALL macros are moved to a common header
sysdep-vdso.h and vDSO name declaration and prototype is defined
using a common macro.

Also PTR_{MANGLE,DEMANGLE} is added to ports that does not use them
for vDSO calls (aarch64, powerpc, s390, and tile) and thus it will
reflect in code changes.  For ports that already implement pointer
mangling/demangling in vDSO system (i386, x32, x86_64) this patch
is mainly a code refactor.

Checked on x32, x86_64, x32, ppc64le, and aarch64.

1 files changed, 5 insertions, 15 deletions

diff --git a/sysdeps/unix/sysv/linux/timespec_get.c b/sysdeps/unix/sysv/linux/timespec_get.c
index 25616493cd..0e5f513f3d 100644
--- a/sysdeps/unix/sysv/linux/timespec_get.c
+++ b/sysdeps/unix/sysv/linux/timespec_get.c
@@ -18,31 +18,21 @@
 #include <time.h>
 #include <sysdep.h>
 
-#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
-# undef INTERNAL_VSYSCALL
-# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
-#else
-# include <libc-vdso.h>
+#ifdef HAVE_CLOCK_GETTIME_VSYSCALL
+# define HAVE_VSYSCALL
 #endif
-
-#ifndef INTERNAL_GETTIME
-# define INTERNAL_GETTIME(id, tp) \
-  INTERNAL_VSYSCALL (clock_gettime, err, 2, id, tp)
-#endif
-
+#include <sysdep-vdso.h>
 
 /* Set TS to calendar time based in time base BASE.  */
 int
-timespec_get (ts, base)
-     struct timespec *ts;
-     int base;
+timespec_get (struct timespec *ts, int base)
 {
   switch (base)
     {
       int res;
       INTERNAL_SYSCALL_DECL (err);
     case TIME_UTC:
-      res = INTERNAL_GETTIME (CLOCK_REALTIME, ts);
+      res = INTERNAL_VSYSCALL (clock_gettime, err, 2, CLOCK_REALTIME, ts);
       if (INTERNAL_SYSCALL_ERROR_P (res, err))
 	return 0;
       break;