filling out system layer

1 files changed, 16 insertions, 0 deletions

diff --git a/sys/src/mmap.c b/sys/src/mmap.c
index fb5c5f4..21d927b 100644
--- a/sys/src/mmap.c
+++ b/sys/src/mmap.c
@@ -1 +1,17 @@
 #include "internal.h"
+
+int
+sys·mmap(void *start, uintptr len, int protect, int flags, int fd, intptr off, void **buf)
+{
+    long ret;
+    if(len >= PTRDIFF_MAX)
+        return sys·ErrorNoMemory;
+
+    ret = syscall(·MMap, start, len, protect, flags, fd, off);
+    if(ret < 0){
+        *buf = nil;
+        return -ret;
+    }
+    *buf = (void*)ret;
+    return 0;
+}