summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux
diff options
context:
space:
mode:
Diffstat (limited to 'libc/sysdeps/linux')
-rw-r--r--libc/sysdeps/linux/common/mmap64.c43
1 files changed, 36 insertions, 7 deletions
diff --git a/libc/sysdeps/linux/common/mmap64.c b/libc/sysdeps/linux/common/mmap64.c
index 0a67abba2..1f1b8dc9a 100644
--- a/libc/sysdeps/linux/common/mmap64.c
+++ b/libc/sysdeps/linux/common/mmap64.c
@@ -17,17 +17,13 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+/* Massivly hacked up for uClibc by Erik Andersen */
+
#include <errno.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/mman.h>
-/* Massivly hackd up for uClibc by Erik Andersen
- *
- * This version is a stub that just chops off everything at the mmap 32 bit
- * mmap() address space... You need to add in an arch specific implementation
- * to override this as there is not a generic way for me to implement this
- * particular syscall. */
#if defined __UCLIBC_HAS_LFS__
@@ -44,7 +40,17 @@
# undef __USE_FILE_OFFSET64
#endif
-#undef creat
+
+#if ! defined __NR_mmap2 || ! defined _syscall6
+
+/*
+ * This version is a stub that just chops off everything at the mmap 32 bit
+ * mmap() address space... You will probably need to add in an arch specific
+ * implementation to override this as there is not a generic way for me to
+ * implement this particular syscall if your arch lacks _syscall6...
+ *
+*/
+
__ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t offset)
{
if (offset != (off_t) offset || (offset + len) != (off_t) (offset + len))
@@ -55,5 +61,28 @@ __ptr_t mmap64(__ptr_t addr, size_t len, int prot, int flags, int fd, __off64_t
return mmap (addr, len, prot, flags, fd, (off_t) offset);
}
+
+#else
+
+#define __NR___syscall_mmap2 __NR_mmap2
+static inline _syscall6(void *, __syscall_mmap2, void *, addr,
+ size_t len, int, prot, int, flags, int, fd, off_t, offset);
+
+/* This is always 12, even on architectures where PAGE_SHIFT != 12. */
+# ifndef MMAP2_PAGE_SHIFT
+# define MMAP2_PAGE_SHIFT 12
+# endif
+
+void * __mmap64 (void *addr, size_t len, int prot, int flags, int fd, off64_t offset)
+{
+ void *result;
+ if (offset & ((1 << MMAP2_PAGE_SHIFT) - 1)) {
+ __set_errno (EINVAL);
+ return MAP_FAILED;
+ }
+ return(__syscall_mmap2(addr, len, prot, flags, fd, (off_t) (offset >> MMAP2_PAGE_SHIFT)));
+}
+
+#endif
#endif /* __UCLIBC_HAS_LFS__ */