filling out system layer

1 files changed, 20 insertions, 0 deletions

diff --git a/sys/src/mremap.c b/sys/src/mremap.c
new file mode 100644
index 0000000..dda05ce
--- /dev/null
+++ b/sys/src/mremap.c
@@ -0,0 +1,20 @@
+#include "internal.h"
+
+int
+sys·mremap(void *addr, uintptr from, uintptr to, int flags, void **ret)
+{
+    long r;
+    void *new;
+
+    if(to >= PTRDIFF_MAX)
+        return sys·ErrorNoMemory;
+
+    new = (flags & sys·RemapFixed) ? *ret : nil;
+    r = syscall(·MRemap, addr, from, to, flags, new);
+    if(r > 0){
+        *ret = (void*)r;
+        return 0;
+    }
+
+    return error(r);
+}