Added libc functions

common.h

@@ -0,0 +1,36 @@
+#ifndef COMMON_H_
+#define COMMON_H_
+
+#define true 1
+#define false 0
+
+#define NULL ((void*)0)
+
+#define va_list __builtin_va_list
+#define va_start __builtin_va_start
+#define va_end __builtin_va_end
+#define va_arg __builtin_va_arg
+
+#define offsetof(type, member) ((size_t)&(((type*)0)->member))
+
+typedef int bool;
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t ;
+typedef unsigned int uint32_t;
+
+typedef uint32_t size_t;
+typedef uint32_t paddr_t;
+typedef uint32_t vaddr_t ;
+
+void printf(const char *fmt, ...);
+
+size_t align_up(size_t value, size_t align);
+size_t is_aligned(size_t value, size_t align);
+
+void *memcpy(void *dst, const void *src, size_t n);
+void *memset(void *buf, char c, size_t n);
+
+char *strcpy(char *dst, const char *src);
+int strcmp(const char *s1, const char *s2);
+
+#endif // COMMON_H_