[git commit master] Add posix_fadvise and posix_fadvise64 for powerpc

[Khem Raj]

commit: http://git.uclibc.org/uClibc/commit/?id=4882fad17edf8e7f2c13877bdcc04c4068b91d35
branch: http://git.uclibc.org/uClibc/commit/?id=refs/heads/master

The syscall is having different number of params
and in one case the parameters are passed in differently.
This patch add powerpc specific versions of these
functions.

Signed-off-by: Khem Raj <raj.khem at gmail.com>
---
 libc/sysdeps/linux/powerpc/posix_fadvise.c   |   36 +++++++++++++
 libc/sysdeps/linux/powerpc/posix_fadvise64.c |   70 ++++++++++++++++++++++++++
 2 files changed, 106 insertions(+), 0 deletions(-)
 create mode 100644 libc/sysdeps/linux/powerpc/posix_fadvise.c
 create mode 100644 libc/sysdeps/linux/powerpc/posix_fadvise64.c

diff --git a/libc/sysdeps/linux/powerpc/posix_fadvise.c b/libc/sysdeps/linux/powerpc/posix_fadvise.c
new file mode 100644
index 0000000..ce3574f
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/posix_fadvise.c
@@ -0,0 +1,36 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * posix_fadvise() for uClibc
+ * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen at uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <fcntl.h>
+
+#ifdef __NR_fadvise64
+#define __NR_posix_fadvise __NR_fadvise64
+int posix_fadvise(int fd, off_t offset, off_t len, int advice)
+{
+	INTERNAL_SYSCALL_DECL(err);
+	int ret = (int) (INTERNAL_SYSCALL(posix_fadvise, err, 6, fd, 0,
+	 __LONG_LONG_PAIR (offset >> 31, offset), len, advice));
+    if (INTERNAL_SYSCALL_ERROR_P (ret, err))
+      return INTERNAL_SYSCALL_ERRNO (ret, err);
+    return 0;
+}
+
+#if defined __UCLIBC_HAS_LFS__ && (!defined __NR_fadvise64_64 || !defined _syscall6)
+strong_alias(posix_fadvise,posix_fadvise64)
+#endif
+
+#else
+int posix_fadvise(int fd attribute_unused, off_t offset attribute_unused, off_t len attribute_unused, int advice attribute_unused)
+{
+#warning This is not correct as far as SUSv3 is concerned.
+	return ENOSYS;
+}
+#endif
diff --git a/libc/sysdeps/linux/powerpc/posix_fadvise64.c b/libc/sysdeps/linux/powerpc/posix_fadvise64.c
new file mode 100644
index 0000000..30b9bec
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/posix_fadvise64.c
@@ -0,0 +1,70 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * posix_fadvise64() for uClibc
+ * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen at uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <features.h>
+#include <unistd.h>
+#include <errno.h>
+#include <endian.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+#include <fcntl.h>
+
+#ifdef __UCLIBC_HAS_LFS__
+#ifdef __NR_fadvise64_64
+
+/* 64 bit implementation is cake ... or more like pie ... */
+#if __WORDSIZE == 64
+
+#define __NR_posix_fadvise64 __NR_fadvise64_64
+
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+  if (len != (off_t) len)
+    return EOVERFLOW;
+  INTERNAL_SYSCALL_DECL (err);
+    int ret = INTERNAL_SYSCALL (posix_fadvise64, err, 6, fd, 0,
+                               __LONG_LONG_PAIR ((long) (offset >> 32),
+                                                 (long) offset),
+                               (off_t) len, advice);
+  if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
+    return 0;
+  return INTERNAL_SYSCALL_ERRNO (ret, err);
+}
+
+/* 32 bit implementation is kind of a pita */
+#elif __WORDSIZE == 32
+
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+	INTERNAL_SYSCALL_DECL (err);
+	int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advise,
+								__LONG_LONG_PAIR(offset >> 32, offset &  0xffffffff),
+								__LONG_LONG_PAIR(len >> 32, len & 0xffffffff));
+	if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
+		return 0;
+	return INTERNAL_SYSCALL_ERRNO (ret, err);
+}
+
+#else
+#error your machine is neither 32 bit or 64 bit ... it must be magical
+#endif
+
+#elif !defined __NR_fadvise64
+/* This is declared as a strong alias in posix_fadvise.c if __NR_fadvise64
+ * is defined.
+ */
+int posix_fadvise64(int fd, __off64_t offset, __off64_t len, int advice)
+{
+#warning This is not correct as far as SUSv3 is concerned.
+	return ENOSYS;
+}
+#endif /* __NR_fadvise64_64 */
+#endif /* __UCLIBC_HAS_LFS__ */
-- 
1.6.3.3