csky: add statx conditionals

Similar to glibc commit
https://sourceware.org/git/?p=glibc.git;a=commit;h=6bbfc5c09fc5b5e3d4a0cddbbd4e2e457767dae7
we need to handle Linux kernel change, which removed stat64 family from default syscall set.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Waldemar Brodkorb <wbrodkorb@conet.de>

10 files changed, 287 insertions, 3 deletions

diff --git a/libc/sysdeps/linux/common/bits/statx.h b/libc/sysdeps/linux/common/bits/statx.h
new file mode 100644
index 000000000..eb9b8535c
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/statx.h
@@ -0,0 +1,93 @@
+/* Generic statx-related definitions and declarations.
+   Copyright (C) 2018-2019 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+/* This interface is based on <linux/stat.h> in Linux.  */
+
+#ifndef _SYS_STAT_H
+# error Never include <bits/statx.h> directly, include <sys/stat.h> instead.
+#endif
+
+struct statx_timestamp
+{
+  __int64_t tv_sec;
+  __uint32_t tv_nsec;
+  __int32_t __statx_timestamp_pad1[1];
+};
+
+/* Warning: The kernel may add additional fields to this struct in the
+   future.  Only use this struct for calling the statx function, not
+   for storing data.  (Expansion will be controlled by the mask
+   argument of the statx function.)  */
+struct statx
+{
+  __uint32_t stx_mask;
+  __uint32_t stx_blksize;
+  __uint64_t stx_attributes;
+  __uint32_t stx_nlink;
+  __uint32_t stx_uid;
+  __uint32_t stx_gid;
+  __uint16_t stx_mode;
+  __uint16_t __statx_pad1[1];
+  __uint64_t stx_ino;
+  __uint64_t stx_size;
+  __uint64_t stx_blocks;
+  __uint64_t stx_attributes_mask;
+  struct statx_timestamp stx_atime;
+  struct statx_timestamp stx_btime;
+  struct statx_timestamp stx_ctime;
+  struct statx_timestamp stx_mtime;
+  __uint32_t stx_rdev_major;
+  __uint32_t stx_rdev_minor;
+  __uint32_t stx_dev_major;
+  __uint32_t stx_dev_minor;
+  __uint64_t __statx_pad2[14];
+};
+
+#ifndef STATX_TYPE
+# define STATX_TYPE 0x0001U
+# define STATX_MODE 0x0002U
+# define STATX_NLINK 0x0004U
+# define STATX_UID 0x0008U
+# define STATX_GID 0x0010U
+# define STATX_ATIME 0x0020U
+# define STATX_MTIME 0x0040U
+# define STATX_CTIME 0x0080U
+# define STATX_INO 0x0100U
+# define STATX_SIZE 0x0200U
+# define STATX_BLOCKS 0x0400U
+# define STATX_BASIC_STATS 0x07ffU
+# define STATX_ALL 0x0fffU
+# define STATX_BTIME 0x0800U
+# define STATX__RESERVED 0x80000000U
+
+# define STATX_ATTR_COMPRESSED 0x0004
+# define STATX_ATTR_IMMUTABLE 0x0010
+# define STATX_ATTR_APPEND 0x0020
+# define STATX_ATTR_NODUMP 0x0040
+# define STATX_ATTR_ENCRYPTED 0x0800
+# define STATX_ATTR_AUTOMOUNT 0x1000
+#endif /* !STATX_TYPE */
+
+__BEGIN_DECLS
+
+/* Fill *BUF with information about PATH in DIRFD.  */
+int statx (int __dirfd, const char *__restrict __path, int __flags,
+           unsigned int __mask, struct statx *__restrict __buf)
+  __THROW __nonnull ((2, 5));
+
+__END_DECLS
+
diff --git a/libc/sysdeps/linux/common/bits/uClibc_arch_features.h b/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
index 37c7ceb60..c79ca7dfa 100644
--- a/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
+++ b/libc/sysdeps/linux/common/bits/uClibc_arch_features.h
@@ -14,6 +14,9 @@
 /* can your target use syscall6() for mmap ? */
 #undef __UCLIBC_MMAP_HAS_6_ARGS__
 
+/* does your target use statx */
+#undef __UCLIBC_HAVE_STATX__
+
 /* does your target align 64bit values in register pairs ? (32bit arches only) */
 #undef __UCLIBC_SYSCALL_ALIGN_64BIT__
 
diff --git a/libc/sysdeps/linux/common/fstat.c b/libc/sysdeps/linux/common/fstat.c
index 030360dfc..0b2798ad4 100644
--- a/libc/sysdeps/linux/common/fstat.c
+++ b/libc/sysdeps/linux/common/fstat.c
@@ -29,6 +29,20 @@ int fstat(int fd, struct stat *buf)
 }
 libc_hidden_def(fstat)
 
+#elif __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int fstat(int fd, struct stat *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat *)buf, &tmp);
+}
+libc_hidden_def(fstat)
+
 #elif defined __NR_fstat
 int fstat(int fd, struct stat *buf)
 {
@@ -57,7 +71,7 @@ int fstat(int fd, struct stat *buf)
 libc_hidden_def(fstat)
 #endif
 
-# if ! defined __NR_fstat64
+# if ! defined __NR_fstat64 && ! defined __UCLIBC_HAVE_STATX__
 strong_alias_untyped(fstat,fstat64)
 libc_hidden_def(fstat64)
 #endif
diff --git a/libc/sysdeps/linux/common/fstat64.c b/libc/sysdeps/linux/common/fstat64.c
index 62995b2dc..fe1cb4fe5 100644
--- a/libc/sysdeps/linux/common/fstat64.c
+++ b/libc/sysdeps/linux/common/fstat64.c
@@ -28,9 +28,26 @@ int fstat64(int fd, struct stat64 *buf)
 		__xstat64_conv(&kbuf, buf);
 	}
 	return result;
+
 #else
 	return __syscall_fstat64(fd, buf);
 #endif
 }
 libc_hidden_def(fstat64)
+
+#elif __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int fstat64(int fd, struct stat64 *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, fd, "", AT_EMPTY_PATH,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat64 *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(fstat64)
 #endif
diff --git a/libc/sysdeps/linux/common/lstat.c b/libc/sysdeps/linux/common/lstat.c
index 9d2024972..8a0baf85f 100644
--- a/libc/sysdeps/linux/common/lstat.c
+++ b/libc/sysdeps/linux/common/lstat.c
@@ -28,6 +28,23 @@ int lstat(const char *file_name, struct stat *buf)
 }
 libc_hidden_def(lstat)
 
+#elif defined __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int lstat(const char *file_name, struct stat *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name,
+                               AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat_statx ((struct stat *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(lstat)
+
 /* For systems which have both, prefer the old one */
 #else
 # include "xstatconv.h"
@@ -57,7 +74,7 @@ int lstat(const char *file_name, struct stat *buf)
 }
 libc_hidden_def(lstat)
 
-# if ! defined __NR_fstatat64 && ! defined __NR_lstat64
+# if ! defined __NR_fstatat64 && ! defined __NR_lstat64 && ! defined __UCLIBC_HAS_STATX__
 strong_alias_untyped(lstat,lstat64)
 libc_hidden_def(lstat64)
 # endif
diff --git a/libc/sysdeps/linux/common/lstat64.c b/libc/sysdeps/linux/common/lstat64.c
index 2f66e7ca2..61892994e 100644
--- a/libc/sysdeps/linux/common/lstat64.c
+++ b/libc/sysdeps/linux/common/lstat64.c
@@ -29,6 +29,23 @@ int lstat64(const char *file_name, struct stat64 *buf)
 }
 libc_hidden_def(lstat64)
 
+#elif defined __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int lstat64(const char *file_name, struct stat64 *buf)
+{
+      struct statx tmp;
+      int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name,
+                               AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW,
+                               STATX_BASIC_STATS, &tmp);
+      if (rc == 0)
+        __cp_stat64_statx ((struct stat64 *)buf, &tmp);
+
+      return rc;
+}
+libc_hidden_def(lstat64)
+
 /* For systems which have both, prefer the old one */
 #elif defined __NR_lstat64
 # include "xstatconv.h"
diff --git a/libc/sysdeps/linux/common/stat.c b/libc/sysdeps/linux/common/stat.c
index 6489d229b..a860c0c7f 100644
--- a/libc/sysdeps/linux/common/stat.c
+++ b/libc/sysdeps/linux/common/stat.c
@@ -27,7 +27,20 @@ int stat(const char *file_name, struct stat *buf)
 {
 	return fstatat64(AT_FDCWD, file_name, buf, 0);
 }
+#elif __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
 
+int stat(const char *file_name, struct stat *buf)
+{
+	struct statx tmp;
+	int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name, AT_NO_AUTOMOUNT,
+                                STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat *)buf, &tmp);
+
+	return rc;
+}
 #else
 # include "xstatconv.h"
 
@@ -58,7 +71,7 @@ int stat(const char *file_name, struct stat *buf)
 #endif /* __NR_fstat64 */
 libc_hidden_def(stat)
 
-#if ! defined __NR_stat64 && ! defined __NR_fstatat64
+#if ! defined __NR_stat64 && ! defined __NR_fstatat64 && ! defined __UCLIBC_HAVE_STATX__
 strong_alias_untyped(stat,stat64)
 libc_hidden_def(stat64)
 #endif
diff --git a/libc/sysdeps/linux/common/stat64.c b/libc/sysdeps/linux/common/stat64.c
index ef365c7e7..47d938b11 100644
--- a/libc/sysdeps/linux/common/stat64.c
+++ b/libc/sysdeps/linux/common/stat64.c
@@ -20,6 +20,22 @@ int stat64(const char *file_name, struct stat64 *buf)
 }
 libc_hidden_def(stat64)
 
+#elif __NR_statx && defined __UCLIBC_HAVE_STATX__
+# include <fcntl.h>
+# include <statx_cp.h>
+
+int stat64(const char *file_name, struct stat64 *buf)
+{
+	struct statx tmp;
+	int rc = INLINE_SYSCALL (statx, 5, AT_FDCWD, file_name, AT_NO_AUTOMOUNT,
+                                STATX_BASIC_STATS, &tmp);
+	if (rc == 0)
+		__cp_stat_statx ((struct stat64 *)buf, &tmp);
+
+	return rc;
+}
+libc_hidden_def(stat64)
+
 /* For systems which have both, prefer the old one */
 # elif defined __NR_stat64
 # define __NR___syscall_stat64 __NR_stat64
diff --git a/libc/sysdeps/linux/common/statx_cp.c b/libc/sysdeps/linux/common/statx_cp.c
new file mode 100644
index 000000000..1a6253b4d
--- /dev/null
+++ b/libc/sysdeps/linux/common/statx_cp.c
@@ -0,0 +1,72 @@
+/* Struct statx to stat/stat64 conversion for Linux.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stddef.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include <statx_cp.h>
+
+#if !defined(__NR_fstat64) || !defined(__NR_fstatat64)
+void
+__cp_stat64_statx (struct stat64 *to, struct statx *from)
+{
+  memset (to, 0, sizeof (struct stat64));
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+  to->st_size = from->stx_size;
+  to->st_blocks = from->stx_blocks;
+  to->st_blksize = from->stx_blksize;
+}
+
+void
+__cp_stat_statx (struct stat *to, struct statx *from)
+{
+  memset (to, 0, sizeof (struct stat));
+  to->st_dev = ((from->stx_dev_minor & 0xff) | (from->stx_dev_major << 8)
+		| ((from->stx_dev_minor & ~0xff) << 12));
+  to->st_rdev = ((from->stx_rdev_minor & 0xff) | (from->stx_rdev_major << 8)
+		 | ((from->stx_rdev_minor & ~0xff) << 12));
+  to->st_ino = from->stx_ino;
+  to->st_mode = from->stx_mode;
+  to->st_nlink = from->stx_nlink;
+  to->st_uid = from->stx_uid;
+  to->st_gid = from->stx_gid;
+  to->st_atime = from->stx_atime.tv_sec;
+  to->st_atim.tv_nsec = from->stx_atime.tv_nsec;
+  to->st_mtime = from->stx_mtime.tv_sec;
+  to->st_mtim.tv_nsec = from->stx_mtime.tv_nsec;
+  to->st_ctime = from->stx_ctime.tv_sec;
+  to->st_ctim.tv_nsec = from->stx_ctime.tv_nsec;
+  to->st_size = from->stx_size;
+  to->st_blocks = from->stx_blocks;
+  to->st_blksize = from->stx_blksize;
+}
+#endif
diff --git a/libc/sysdeps/linux/common/statx_cp.h b/libc/sysdeps/linux/common/statx_cp.h
new file mode 100644
index 000000000..ff8fc9931
--- /dev/null
+++ b/libc/sysdeps/linux/common/statx_cp.h
@@ -0,0 +1,22 @@
+/* Struct statx to stat/stat64 conversion for Linux.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+extern void __cp_stat64_statx (struct stat64 *to, struct statx *from)
+  attribute_hidden;
+
+extern void __cp_stat_statx (struct stat *to, struct statx *from)
+  attribute_hidden;