#include <errno.h> static inline intsyscall(int num, unsigned a1, unsigned a2, unsigned a3, unsigned a4, unsigned a5){	int ret; 	asm volatile("syscall\n"		: "=a" (ret)		: "a" (num),		  "d" (a1),		  "c" (a2),		  "b" (a3),		  "D" (a4),		  "S" (a5)		: "cc", "memory");		if(ret < 0){		errno = -ret;		return -1;	}	return ret;} enum{	VXSYSEXIT = 1,	VXSYSBRK = 2,	VXSYSREAD = 3,	VXSYSWRITE = 4,	VXSYSOPEN = 5,	VXSYSCLOSE = 6,	VXSYSLSEEK = 7,	VXSYSREMOVE = 8,	VXSYSTIME = 9,	// gettimeofday	VXSYSCLOCK = 10,	VXSYSSTAT = 11,	VXSYSFSTAT = 12,	VXSYSGETCWD = 13,	VXSYSCHDIR = 14,	VXSYSCHMOD = 15,	VXSYSDUP = 16,	VXSYSLINK = 17,	VXSYSSELECT = 18,	VXSYSMKDIR = 19,	VXSYSFCNTL = 20,	VXSYSTRUNCATE = 21,	VXSYSFTRUNCATE = 22,	VXSYSLSTAT = 23,	VXSYSFORK = 24,	VXSYSWAITPID = 25,	VXSYSEXEC = 26,	VXSYSPIPE = 27,	VXSYSSLEEP = 28,	VXSYSGETPID = 29,};