linux: Fix generic struct_stat for 64 bit time (BZ# 29657)

The generic Linux struct_stat misses the conditionals to use
bits/struct_stat_time64_helper.h in the __USE_TIME_BITS64 for
architecture that uses __TIMESIZE == 32 (currently csky and nios2).

Since newer ports should not support 32 bit time_t, the generic
implementation should be used as default.

For arm, hppa, and sh a copy of default struct_stat is added,
while for csky and nios a new one based on generic is used, along
with conditionals to use bits/struct_stat_time64_helper.h.

The default struct_stat is also replaced with the generic one.

Checked on aarch64-linux-gnu and arm-linux-gnueabihf.

(cherry picked from commit 7a6ca82f8007ddbd43e2b8fce806ba7101ee47f5)

1 files changed, 52 insertions, 64 deletions

diff --git a/sysdeps/unix/sysv/linux/bits/struct_stat.h b/sysdeps/unix/sysv/linux/bits/struct_stat.h
index 25bd6cb638..fb11a3fba4 100644
--- a/sysdeps/unix/sysv/linux/bits/struct_stat.h
+++ b/sysdeps/unix/sysv/linux/bits/struct_stat.h
@@ -26,37 +26,36 @@
 #include <bits/endian.h>
 #include <bits/wordsize.h>
 
-struct stat
-  {
-#ifdef __USE_TIME_BITS64
-# include <bits/struct_stat_time64_helper.h>
-#else
-    __dev_t st_dev;			/* Device.  */
-    unsigned short int __pad1;
-# ifndef __USE_FILE_OFFSET64
-    __ino_t st_ino;			/* File serial number.	*/
-# else
-    __ino_t __st_ino;			/* 32bit file serial number.	*/
+#if defined __USE_FILE_OFFSET64
+# define __field64(type, type64, name) type64 name
+#elif __WORDSIZE == 64 || defined __INO_T_MATCHES_INO64_T
+# if defined __INO_T_MATCHES_INO64_T && !defined __OFF_T_MATCHES_OFF64_T
+#  error "ino_t and off_t must both be the same type"
 # endif
-    __mode_t st_mode;			/* File mode.  */
-    __nlink_t st_nlink;			/* Link count.  */
-    __uid_t st_uid;			/* User ID of the file's owner.	*/
-    __gid_t st_gid;			/* Group ID of the file's group.*/
-    __dev_t st_rdev;			/* Device number, if device.  */
-    unsigned short int __pad2;
-# ifndef __USE_FILE_OFFSET64
-    __off_t st_size;			/* Size of file, in bytes.  */
-# else
-    __off64_t st_size;			/* Size of file, in bytes.  */
-# endif
-    __blksize_t st_blksize;		/* Optimal block size for I/O.  */
+# define __field64(type, type64, name) type name
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+# define __field64(type, type64, name) \
+  type name __attribute__((__aligned__ (__alignof__ (type64)))); int __##name##_pad
+#else
+# define __field64(type, type64, name) \
+  int __##name##_pad __attribute__((__aligned__ (__alignof__ (type64)))); type name
+#endif
 
-# ifndef __USE_FILE_OFFSET64
-    __blkcnt_t st_blocks;		/* Number 512-byte blocks allocated. */
-# else
-    __blkcnt64_t st_blocks;		/* Number 512-byte blocks allocated. */
-# endif
-# ifdef __USE_XOPEN2K8
+struct stat
+  {
+    __dev_t st_dev;		/* Device.  */
+    __field64(__ino_t, __ino64_t, st_ino);  /* File serial number. */
+    __mode_t st_mode;		/* File mode.  */
+    __nlink_t st_nlink;		/* Link count.  */
+    __uid_t st_uid;		/* User ID of the file's owner.	*/
+    __gid_t st_gid;		/* Group ID of the file's group.*/
+    __dev_t st_rdev;		/* Device number, if device.  */
+    __dev_t __pad1;
+    __field64(__off_t, __off64_t, st_size);  /* Size of file, in bytes. */
+    __blksize_t st_blksize;	/* Optimal block size for I/O.  */
+    int __pad2;
+    __field64(__blkcnt_t, __blkcnt64_t, st_blocks);  /* 512-byte blocks */
+#ifdef __USE_XOPEN2K8
     /* Nanosecond resolution timestamps are stored in a format
        equivalent to 'struct timespec'.  This is the type used
        whenever possible but the Unix namespace rules do not allow the
@@ -66,47 +65,38 @@ struct stat
     struct timespec st_atim;		/* Time of last access.  */
     struct timespec st_mtim;		/* Time of last modification.  */
     struct timespec st_ctim;		/* Time of last status change.  */
-#  define st_atime st_atim.tv_sec	/* Backward compatibility.  */
-#  define st_mtime st_mtim.tv_sec
-#  define st_ctime st_ctim.tv_sec
-# else
+# define st_atime st_atim.tv_sec	/* Backward compatibility.  */
+# define st_mtime st_mtim.tv_sec
+# define st_ctime st_ctim.tv_sec
+#else
     __time_t st_atime;			/* Time of last access.  */
     unsigned long int st_atimensec;	/* Nscecs of last access.  */
     __time_t st_mtime;			/* Time of last modification.  */
     unsigned long int st_mtimensec;	/* Nsecs of last modification.  */
     __time_t st_ctime;			/* Time of last status change.  */
     unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
-# endif
-# ifndef __USE_FILE_OFFSET64
-    unsigned long int __glibc_reserved4;
-    unsigned long int __glibc_reserved5;
-# else
-    __ino64_t st_ino;			/* File serial number.	*/
-# endif
-#endif /* __USE_TIME_BITS64  */
+#endif
+    int __glibc_reserved[2];
   };
 
+#undef __field64
+
 #ifdef __USE_LARGEFILE64
 struct stat64
   {
-# ifdef __USE_TIME_BITS64
-#  include <bits/struct_stat_time64_helper.h>
-# else
-    __dev_t st_dev;			/* Device.  */
-    unsigned int __pad1;
-
-    __ino_t __st_ino;			/* 32bit file serial number.	*/
-    __mode_t st_mode;			/* File mode.  */
-    __nlink_t st_nlink;			/* Link count.  */
-    __uid_t st_uid;			/* User ID of the file's owner.	*/
-    __gid_t st_gid;			/* Group ID of the file's group.*/
-    __dev_t st_rdev;			/* Device number, if device.  */
-    unsigned int __pad2;
-    __off64_t st_size;			/* Size of file, in bytes.  */
-    __blksize_t st_blksize;		/* Optimal block size for I/O.  */
-
-    __blkcnt64_t st_blocks;		/* Number 512-byte blocks allocated. */
-#  ifdef __USE_XOPEN2K8
+    __dev_t st_dev;		/* Device.  */
+    __ino64_t st_ino;		/* File serial number.	*/
+    __mode_t st_mode;		/* File mode.  */
+    __nlink_t st_nlink;		/* Link count.  */
+    __uid_t st_uid;		/* User ID of the file's owner.	*/
+    __gid_t st_gid;		/* Group ID of the file's group.*/
+    __dev_t st_rdev;		/* Device number, if device.  */
+    __dev_t __pad1;
+    __off64_t st_size;		/* Size of file, in bytes.  */
+    __blksize_t st_blksize;	/* Optimal block size for I/O.  */
+    int __pad2;
+    __blkcnt64_t st_blocks;	/* Nr. 512-byte blocks allocated.  */
+#ifdef __USE_XOPEN2K8
     /* Nanosecond resolution timestamps are stored in a format
        equivalent to 'struct timespec'.  This is the type used
        whenever possible but the Unix namespace rules do not allow the
@@ -116,16 +106,15 @@ struct stat64
     struct timespec st_atim;		/* Time of last access.  */
     struct timespec st_mtim;		/* Time of last modification.  */
     struct timespec st_ctim;		/* Time of last status change.  */
-#  else
+#else
     __time_t st_atime;			/* Time of last access.  */
     unsigned long int st_atimensec;	/* Nscecs of last access.  */
     __time_t st_mtime;			/* Time of last modification.  */
     unsigned long int st_mtimensec;	/* Nsecs of last modification.  */
     __time_t st_ctime;			/* Time of last status change.  */
     unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
-#  endif
-    __ino64_t st_ino;			/* File serial number.		*/
-# endif /* __USE_TIME_BITS64  */
+#endif
+    int __glibc_reserved[2];
   };
 #endif
 
@@ -135,5 +124,4 @@ struct stat64
 /* Nanosecond resolution time values are supported.  */
 #define _STATBUF_ST_NSEC
 
-
 #endif /* _BITS_STRUCT_STAT_H  */