diff --git a/libportable/arch-mips/mmap.c b/libportable/arch-mips/mmap.c
index e772a7c..0a304f0 100644
--- a/libportable/arch-mips/mmap.c
+++ b/libportable/arch-mips/mmap.c
@@ -3,17 +3,58 @@
 #include <errno.h>
 #include <sys/mman.h>
 
-/* May integate into one header file */
-#define MAP_ANONYMOUS_PORTABLE 0x20
-#define PROT_SEM_PORTABLE 0x8
+/* Derived from development/ndk/platforms/android-3/include/asm-generic/mman.h */
+#define PROT_READ_PORTABLE     0x1
+#define PROT_WRITE_PORTABLE    0x2
+#define PROT_EXEC_PORTABLE     0x4
+#define PROT_SEM_PORTABLE      0x8
+#define PROT_NONE_PORTABLE     0x0
+#define PROT_GROWSDOWN_PORTABLE        0x01000000
+#define PROT_GROWSUP_PORTABLE  0x02000000
 
-extern void* __mmap2(void*, size_t, int, int, int, size_t);
+#define MAP_SHARED_PORTABLE    0x01
+#define MAP_PRIVATE_PORTABLE   0x02
+#define MAP_TYPE_PORTABLE      0x0f
+#define MAP_FIXED_PORTABLE     0x10
+#define MAP_ANONYMOUS_PORTABLE 0x20
+
+#define MS_ASYNC_PORTABLE      1
+#define MS_INVALIDATE_PORTABLE 2
+#define MS_SYNC_PORTABLE       4
+
+#define MADV_NORMAL_PORTABLE   0
+#define MADV_RANDOM_PORTABLE   1
+#define MADV_SEQUENTIAL_PORTABLE 2
+#define MADV_WILLNEED_PORTABLE 3
+#define MADV_DONTNEED_PORTABLE 4
+
+#define MADV_REMOVE_PORTABLE   9
+#define MADV_DONTFORK_PORTABLE 10
+#define MADV_DOFORK_PORTABLE   11
+
+#define MAP_ANON_PORTABLE      MAP_ANONYMOUS_PORTABLE
+#define MAP_FILE_PORTABLE      0
+
+/* Derived from development/ndk/platforms/android-3/include/asm-generic/mman.h */
+#define MAP_GROWSDOWN_PORTABLE 0x0100
+#define MAP_DENYWRITE_PORTABLE 0x0800
+#define MAP_EXECUTABLE_PORTABLE        0x1000
+#define MAP_LOCKED_PORTABLE    0x2000
+#define MAP_NORESERVE_PORTABLE 0x4000
+#define MAP_POPULATE_PORTABLE  0x8000
+#define MAP_NONBLOCK_PORTABLE  0x10000
+
+#define MCL_CURRENT_PORTABLE   1
+#define MCL_FUTURE_PORTABLE    2
+
 
 #if MAP_ANONYMOUS_PORTABLE==MAP_ANONYMOUS
 #error Bad build environment
 #endif
 
-static inline int mips_change_prot(int prot) {
+static inline int mips_change_prot(int prot)
+{
+    /* Only PROT_SEM is different */
     if (prot & PROT_SEM_PORTABLE) {
         prot &= ~PROT_SEM_PORTABLE;
         prot |= PROT_SEM;
@@ -22,23 +63,53 @@
     return prot;
 }
 
-static inline int mips_change_flags(int flags) {
-    if (flags & MAP_ANONYMOUS_PORTABLE) {
-        flags &= ~MAP_ANONYMOUS_PORTABLE;
-        flags |= MAP_ANONYMOUS;
-    }
+static inline int mips_change_flags(int flags)
+{
+    int mipsflags = 0;
+    /* These are the documented flags for mmap */
+    if (flags & MAP_SHARED_PORTABLE)
+       mipsflags |= MAP_SHARED;
+    if (flags & MAP_PRIVATE_PORTABLE)
+       mipsflags |= MAP_PRIVATE;
+#if defined(MAP_32BIT_PORTABLE) && defined(MAP_32BIT)
+    if (flags & MAP_32BIT_PORTABLE)
+       mipsflags |= MAP_32BIT;
+#endif
+    if (flags & MAP_ANONYMOUS_PORTABLE)
+       mipsflags |= MAP_ANONYMOUS;
+    if (flags & MAP_FIXED_PORTABLE)
+       mipsflags |= MAP_FIXED;
+    if (flags & MAP_GROWSDOWN_PORTABLE)
+       mipsflags |= MAP_GROWSDOWN;
+#if defined(MAP_HUGETLB_PORTABLE) && defined(MAP_HUGETLB)
+    if (flags & MAP_HUGETLB_PORTABLE)
+       mipsflags |= MAP_HUGETLB;
+#endif
+    if (flags & MAP_LOCKED_PORTABLE)
+       mipsflags |= MAP_LOCKED;
+    if (flags & MAP_NONBLOCK_PORTABLE)
+       mipsflags |= MAP_NONBLOCK;
+    if (flags & MAP_NORESERVE_PORTABLE)
+       mipsflags |= MAP_NORESERVE;
+    if (flags & MAP_POPULATE_PORTABLE)
+       mipsflags |= MAP_POPULATE;
+#if defined(MAP_STACK_PORTABLE) && defined(MAP_STACK)
+    if (flags & MAP_STACK_PORTABLE)
+       mipsflags |= MAP_STACK;
+#endif
 
-    return flags;
+    return mipsflags;
 }
 
 #define  MMAP2_SHIFT  12
-void* mmap(void* addr, size_t size, int prot, int flags, int fd, long offset) {
+extern void *__mmap2(void *, size_t, int, int, int, size_t);
+void *mmap(void *addr, size_t size, int prot, int flags, int fd, long offset)
+{
     if ( offset & ((1UL << MMAP2_SHIFT)-1) ) {
         errno = EINVAL;
         return MAP_FAILED;
     }
 
-    prot = mips_change_prot(prot);
-    flags = mips_change_flags(flags);
-    return __mmap2(addr, size, prot, flags, fd, (size_t)offset >> MMAP2_SHIFT);
+    return __mmap2(addr, size, mips_change_prot(prot), mips_change_flags(flags),
+                   fd, (size_t)offset >> MMAP2_SHIFT);
 }
diff --git a/libportable/arch-mips/open.c b/libportable/arch-mips/open.c
index aa3ac79..35a4bfa 100644
--- a/libportable/arch-mips/open.c
+++ b/libportable/arch-mips/open.c
@@ -102,7 +102,7 @@
 }
 
 extern int  __open(const char*, int, int);
-int open_portable(const char *pathname, int flags, ...)
+int open(const char *pathname, int flags, ...)
 {
     mode_t  mode = 0;
     flags |= O_LARGEFILE;