Re: LFS/syscalls -> Kernel interface incompatibility

[Thorsten Kukuk <kukuk at suse dot de>]

On Thu, May 25, Ulrich Drepper wrote:

> Thorsten Kukuk <kukuk@suse.de> writes:
> 
> > But with the current situation, I think we need to duplicate this
> > files for every big endian architecture and change the syscall.
> 
> Yes, and this is no real problem.  Just locate them and provide an
> alternative file.  Assume we cannot change the kernel (which is most
> probably the correct assumption).

Ok, here is a patch for sparc32. It seems PowerPC doesn't support
LFS in the moment, but they have to make the same changes if they
support it. Have we more big-endian, 32bit architectures ?
The other syscalls looks ok.

The patch is for glibc 2.1 and 2.2.

  Thorsten

-- 
Thorsten Kukuk       http://www.suse.de/~kukuk/       kukuk@suse.de
SuSE GmbH            Schanzaeckerstr. 10            90443 Nuernberg
Linux is like a Vorlon.  It is incredibly powerful, gives terse,
cryptic answers and has a lot of things going on in the background.
2000-05-26  Thorsten Kukuk  <kukuk@suse.de>

	* sysdeps/unix/sysv/linux/sparc/sparc32/ftruncate64.c: New, change
	  syscall arguments for big-endian.
	* sysdeps/unix/sysv/linux/sparc/sparc32/truncate64.c: Likewise.

--- sysdeps/unix/sysv/linux/sparc/sparc32/ftruncate64.c
+++ sysdeps/unix/sysv/linux/sparc/sparc32/ftruncate64.c	2000/05/26 07:44:11
@@ -0,0 +1,67 @@
+/* Copyright (C) 1997, 1998, 1999, 2000 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#ifdef __NR_ftruncate64
+#ifndef __ASSUME_TRUNCATE64_SYSCALL
+/* The variable is shared between all wrappers around *truncate64 calls.  */
+extern int __have_no_truncate64;
+#endif
+
+extern int __syscall_ftruncate64 (int fd, int high_length, int low_length);
+
+
+/* Truncate the file FD refers to to LENGTH bytes.  */
+int
+ftruncate64 (fd, length)
+     int fd;
+     off64_t length;
+{
+  if (! __have_no_truncate64)
+    {
+      unsigned int low = length & 0xffffffff;
+      unsigned int high = length >> 32;
+      int saved_errno = errno;
+
+      int result = INLINE_SYSCALL (ftruncate64, 3, fd, high, low);
+
+      if (result != -1 || errno != ENOSYS)
+	return result;
+
+      __set_errno (saved_errno);
+      __have_no_truncate64 = 1;
+    }
+
+  if ((off_t) length != length)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  return __ftruncate (fd, (off_t) length);
+}
+
+#else
+/* Use the generic implementation.  */
+# include <sysdeps/generic/ftruncate64.c>
+#endif
--- sysdeps/unix/sysv/linux/sparc/sparc32/truncate64.c
+++ sysdeps/unix/sysv/linux/sparc/sparc32/truncate64.c	2000/05/26 07:44:11
@@ -0,0 +1,65 @@
+/* Copyright (C) 1997, 1998, 1999, 2000 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
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#ifdef __NR_truncate64
+/* The variable is shared between all wrappers around *truncate64 calls.  */
+int __have_no_truncate64;
+
+extern int __syscall_truncate64 (int fd, int high_length, int low_length);
+
+
+/* Truncate the file FD refers to to LENGTH bytes.  */
+int
+truncate64 (path, length)
+     const char *path;
+     off64_t length;
+{
+  if (! __have_no_truncate64)
+    {
+      unsigned int low = length & 0xffffffff;
+      unsigned int high = length >> 32;
+      int saved_errno = errno;
+
+      int result = INLINE_SYSCALL (truncate64, 3, path, high, low);
+
+      if (result != -1 || errno != ENOSYS)
+	return result;
+
+      __set_errno (saved_errno);
+      __have_no_truncate64 = 1;
+    }
+
+  if ((off_t) length != length)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+  return truncate (path, (off_t) length);
+}
+
+#else
+/* Use the generic implementation.  */
+# include <sysdeps/generic/truncate64.c>
+#endif