Implement mmap

include/bits/sys/mman.h

@@ -0,0 +1,6 @@
+#ifndef _BITS_SYS_MMAN_H
+#define _BITS_SYS_MMAN_H
+
+#define MAP_FAILED ((void *) -1)
+
+#endif

include/limits.h

@@ -1,7 +1,11 @@
 #define MB_LEN_MAX 4 // unicode
 
 #define CHAR_BIT __CHAR_BIT__
-#define CHAR_MAX __CHAR_MAX__
+#ifdef __CHAR_MAX__
+# define CHAR_MAX __CHAR_MAX__
+#else
+# define CHAR_MAX 0xFF
+#endif
 #define CHAR_MIN 0
 #define INT_MAX __INT_MAX__
 #define INT_MIN (-INT_MAX - 1)

include/stddef.h

@@ -10,4 +10,6 @@ typedef int32_t wchar_t;
 
 typedef unsigned long long size_t;
 
+#define offsetof(type, member) __builtin_offsetof(type, member)
+
 #endif /* _STDDEF_H */