(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 34 insertions, 151 deletions

diff --git a/sysdeps/unix/sysv/linux/clock_gettime.c b/sysdeps/unix/sysv/linux/clock_gettime.c
index 5afe20feb5..522fac32a7 100644
--- a/sysdeps/unix/sysv/linux/clock_gettime.c
+++ b/sysdeps/unix/sysv/linux/clock_gettime.c
@@ -1,5 +1,4 @@
-/* clock_gettime -- Get current time from a POSIX clockid_t.  Linux version.
-   Copyright (C) 2003,2004,2005,2006 Free Software Foundation, Inc.
+/* Copyright (C) 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,176 +17,60 @@
    02111-1307 USA.  */
 
 #include <sysdep.h>
-#include <errno.h>
-#include <time.h>
-#include "kernel-posix-cpu-timers.h"
-#include <kernel-features.h>
 
-#ifndef HAVE_CLOCK_GETTIME_VSYSCALL
-# undef INTERNAL_VSYSCALL
-# define INTERNAL_VSYSCALL INTERNAL_SYSCALL
-# undef INLINE_VSYSCALL
-# define INLINE_VSYSCALL INLINE_SYSCALL
-#else
-# include <bits/libc-vdso.h>
-#endif
+#include "kernel-features.h"
 
-#define SYSCALL_GETTIME \
-  retval = INLINE_VSYSCALL (clock_gettime, 2, clock_id, tp); \
-  break
 
 #ifdef __ASSUME_POSIX_TIMERS
-
 /* This means the REALTIME and MONOTONIC clock are definitely
    supported in the kernel.  */
-# define SYSDEP_GETTIME							      \
-  SYSDEP_GETTIME_CPUTIME						      \
+# define SYSDEP_GETTIME \
   case CLOCK_REALTIME:							      \
   case CLOCK_MONOTONIC:							      \
-    SYSCALL_GETTIME
-
-# define __libc_missing_posix_timers 0
+    retval = INLINE_SYSCALL (clock_gettime, 2, clock_id, tp);		      \
+    break
 #elif defined __NR_clock_gettime
 /* Is the syscall known to exist?  */
 int __libc_missing_posix_timers attribute_hidden;
 
-static inline int
-maybe_syscall_gettime (clockid_t clock_id, struct timespec *tp)
-{
-  int e = EINVAL;
-
-  if (!__libc_missing_posix_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	return 0;
-
-      e = INTERNAL_SYSCALL_ERRNO (r, err);
-      if (e == ENOSYS)
-	{
-	  __libc_missing_posix_timers = 1;
-	  e = EINVAL;
-	}
-    }
-
-  return e;
-}
-
 /* The REALTIME and MONOTONIC clock might be available.  Try the
    syscall first.  */
-# define SYSDEP_GETTIME							      \
-  SYSDEP_GETTIME_CPUTIME						      \
+# define SYSDEP_GETTIME \
   case CLOCK_REALTIME:							      \
   case CLOCK_MONOTONIC:							      \
-    retval = maybe_syscall_gettime (clock_id, tp);			      \
-    if (retval == 0)							      \
-      break;								      \
-    /* Fallback code.  */						      \
-    if (retval == EINVAL && clock_id == CLOCK_REALTIME)			      \
-      retval = realtime_gettime (tp);					      \
-    else 								      \
-      {									      \
-	__set_errno (retval);						      \
-	retval = -1;							      \
-      }									      \
-    break;
+    {									      \
+      int e = EINVAL;							      \
+									      \
+      if (!__libc_missing_posix_timers)					      \
+	{								      \
+	  INTERNAL_SYSCALL_DECL (err);					      \
+	  int r = INTERNAL_SYSCALL (clock_gettime, err, 2, clock_id, tp);     \
+	  if (!INTERNAL_SYSCALL_ERROR_P (r, err))			      \
+	    {								      \
+	      retval = 0;						      \
+	      break;							      \
+	    }								      \
+									      \
+	  e = INTERNAL_SYSCALL_ERRNO (r, err);				      \
+	  if (e == ENOSYS)						      \
+	    {								      \
+	      __libc_missing_posix_timers = 1;				      \
+	      e = EINVAL;						      \
+	    }								      \
+	}								      \
+									      \
+      /* Fallback code.  */						      \
+      if (e == EINVAL && clock_id == CLOCK_REALTIME)			      \
+	HANDLE_REALTIME;						      \
+      else								      \
+	__set_errno (e);						      \
+    }									      \
+    break
 #endif
 
 #ifdef __NR_clock_gettime
 /* We handled the REALTIME clock here.  */
 # define HANDLED_REALTIME	1
-# define HANDLED_CPUTIME	1
-
-# if __ASSUME_POSIX_CPU_TIMERS > 0
-
-#  define SYSDEP_GETTIME_CPU SYSCALL_GETTIME
-#  define SYSDEP_GETTIME_CPUTIME	/* Default catches them too.  */
-
-# else
-
-int __libc_missing_posix_cpu_timers attribute_hidden;
-
-static int
-maybe_syscall_gettime_cpu (clockid_t clock_id, struct timespec *tp)
-{
-  int e = EINVAL;
-
-  if (!__libc_missing_posix_cpu_timers)
-    {
-      INTERNAL_SYSCALL_DECL (err);
-      int r = INTERNAL_VSYSCALL (clock_gettime, err, 2, clock_id, tp);
-      if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-	return 0;
-
-      e = INTERNAL_SYSCALL_ERRNO (r, err);
-# ifndef __ASSUME_POSIX_TIMERS
-      if (e == ENOSYS)
-	{
-	  __libc_missing_posix_timers = 1;
-	  __libc_missing_posix_cpu_timers = 1;
-	  e = EINVAL;
-	}
-      else
-# endif
-	{
-	  if (e == EINVAL)
-	    {
-	      /* Check whether the kernel supports CPU clocks at all.
-		 If not, record it for the future.  */
-	      r = INTERNAL_VSYSCALL (clock_getres, err, 2,
-				    MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-				    NULL);
-	      if (INTERNAL_SYSCALL_ERROR_P (r, err))
-		__libc_missing_posix_cpu_timers = 1;
-	    }
-	}
-    }
-
-  return e;
-}
-
-#  define SYSDEP_GETTIME_CPU						      \
-  retval = maybe_syscall_gettime_cpu (clock_id, tp);			      \
-  if (retval == 0)							      \
-    break;								      \
-  if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-    {									      \
-      __set_errno (retval);						      \
-      retval = -1;							      \
-      break;								      \
-    }									      \
-  retval = -1 /* Otherwise continue on to the HP_TIMING version.  */;
-
-static inline int
-maybe_syscall_gettime_cputime (clockid_t clock_id, struct timespec *tp)
-{
-  return maybe_syscall_gettime_cpu
-    (clock_id == CLOCK_THREAD_CPUTIME_ID
-     ? MAKE_THREAD_CPUCLOCK (0, CPUCLOCK_SCHED)
-     : MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED),
-     tp);
-}
-
-#  define SYSDEP_GETTIME_CPUTIME					      \
-    case CLOCK_PROCESS_CPUTIME_ID:					      \
-    case CLOCK_THREAD_CPUTIME_ID:					      \
-      retval = maybe_syscall_gettime_cputime (clock_id, tp);		      \
-      if (retval == 0)							      \
-	break;								      \
-      if (retval != EINVAL || !__libc_missing_posix_cpu_timers)		      \
-	{								      \
-	  __set_errno (retval);						      \
-	  retval = -1;							      \
-	  break;							      \
-	}								      \
-      retval = hp_timing_gettime (clock_id, tp);			      \
-      break;
-#  if !HP_TIMING_AVAIL
-#   define hp_timing_gettime(clock_id, tp) (__set_errno (EINVAL), -1)
-#  endif
-
-# endif
 #endif
 
 #include <sysdeps/unix/clock_gettime.c>