Inital import

[l4.git] / l4 / pkg / uclibc / lib / contrib / uclibc / libc / sysdeps / linux / common / mmap.c

diff --git a/l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/common/mmap.c b/l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/common/mmap.c
new file mode 100644 (file)
index 0000000..8995898
--- /dev/null
+++ b/l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/common/mmap.c
@@ -0,0 +1,71 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * mmap() for uClibc
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <bits/uClibc_page.h>
+
+#ifdef __NR_mmap
+
+
+#ifdef __UCLIBC_MMAP_HAS_6_ARGS__
+
+_syscall6(void *, mmap, void *, start, size_t, length,
+               int, prot, int, flags, int, fd, off_t, offset)
+
+#else
+
+# define __NR__mmap __NR_mmap
+static __inline__ _syscall1(__ptr_t, _mmap, unsigned long *, buffer)
+__ptr_t mmap(__ptr_t addr, size_t len, int prot,
+                        int flags, int fd, __off_t offset)
+{
+       unsigned long buffer[6];
+
+       buffer[0] = (unsigned long) addr;
+       buffer[1] = (unsigned long) len;
+       buffer[2] = (unsigned long) prot;
+       buffer[3] = (unsigned long) flags;
+       buffer[4] = (unsigned long) fd;
+       buffer[5] = (unsigned long) offset;
+       return (__ptr_t) _mmap(buffer);
+}
+
+#endif
+
+libc_hidden_def(mmap)
+
+#elif defined(__NR_mmap2)
+
+
+#define __NR___syscall_mmap2 __NR_mmap2
+static __inline__ _syscall6(__ptr_t, __syscall_mmap2, __ptr_t, addr,
+       size_t, len, int, prot, int, flags, int, fd, off_t, offset)
+
+/* Some architectures always use 12 as page shift for mmap2() eventhough the
+ * real PAGE_SHIFT != 12.  Other architectures use the same value as
+ * PAGE_SHIFT...
+ */
+# ifndef MMAP2_PAGE_SHIFT
+#  define MMAP2_PAGE_SHIFT 12
+# endif
+
+__ptr_t mmap(__ptr_t addr, size_t len, int prot, int flags, int fd, __off_t offset)
+{
+       if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) {
+               __set_errno(EINVAL);
+               return MAP_FAILED;
+       }
+       return __syscall_mmap2(addr, len, prot, flags, fd, offset >> MMAP2_PAGE_SHIFT);
+}
+
+libc_hidden_def(mmap)
+
+#endif