Add a header with syscall numbers

kernel/include/syscall_nums.h

@@ -0,0 +1,42 @@
+#define SYS_EXT 0
+#define SYS_OPEN 2
+#define SYS_READ 3
+#define SYS_WRITE 4
+#define SYS_CLOSE 5
+#define SYS_GETTIMEOFDAY 6
+#define SYS_EXECVE 7
+#define SYS_FORK 8
+#define SYS_GETPID 9
+#define SYS_SBRK 10
+#define SYS_UNAME 12
+#define SYS_OPENPTY 13
+#define SYS_SEEK 14
+#define SYS_STAT 15
+#define SYS_MKPIPE 21
+#define SYS_DUP2 22
+#define SYS_GETUID 23
+#define SYS_SETUID 24
+#define SYS_REBOOT 26
+#define SYS_READDIR 27
+#define SYS_CHDIR 28
+#define SYS_GETCWD 29
+#define SYS_CLONE 30
+#define SYS_SETHOSTNAME 31
+#define SYS_GETHOSTNAME 32
+#define SYS_MKDIR 34
+#define SYS_SHM_OBTAIN 35
+#define SYS_SHM_RELEASE 36
+#define SYS_KILL 37
+#define SYS_SIGNAL 38
+#define SYS_GETTID 41
+#define SYS_YIELD 42
+#define SYS_SYSFUNC 43
+#define SYS_SLEEPABS 45
+#define SYS_SLEEP 46
+#define SYS_IOCTL 47
+#define SYS_ACCESS 48
+#define SYS_STATF 49
+#define SYS_CHMOD 50
+#define SYS_UMASK 51
+#define SYS_UNLINK 52
+#define SYS_WAITPID 53