From: Ulrich Drepper <drepper@redhat.com>
Date: Wed, 16 Feb 2000 18:30:07 +0000 (+0000)
Subject: Linux/PPC mmap64 implementation.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b13072d7e43839d272e60b1f5b84306496fdaa51;p=thirdparty%2Fglibc.git

Linux/PPC mmap64 implementation.
---

diff --git a/sysdeps/unix/sysv/linux/powerpc/mmap64.c b/sysdeps/unix/sysv/linux/powerpc/mmap64.c
new file mode 100644
index 00000000000..90a6499ea26
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/mmap64.c
@@ -0,0 +1,63 @@
+/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 1999.
+
+   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 <errno.h>
+#include <unistd.h>
+
+#include <sysdep.h>
+#include <sys/syscall.h>
+
+#include <sys/mman.h>
+
+#include <asm/page.h>
+
+#ifdef __NR_mmap2
+extern int __syscall_mmap2(__ptr_t, size_t, int, int, int, off_t);
+static int have_no_mmap2;
+#endif
+
+__ptr_t
+__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd, off64_t offset)
+{
+#ifdef __NR_mmap2
+  if (! have_no_mmap2 && ! (offset & PAGE_MASK))
+    {
+      int saved_errno = errno;
+
+      /* This will be always 12, no matter what page size is.  */
+      __ptr_t result = INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags,
+				   fd, (off_t) (offset >> PAGE_SHIFT));
+
+      if (result != (__ptr_t) -1 || errno != ENOSYS)
+	return result;
+
+      __set_errno (saved_errno);
+      have_no_mmap2 = 1;
+    }
+#endif
+  if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len))
+    {
+      __set_errno (EINVAL);
+      return MAP_FAILED;
+    }
+
+  return __mmap (addr, len, prot, flags, fd, (off_t) offset);
+}
+
+weak_alias (__mmap64, mmap64)