#include <u.h>#include <libc.h>#include "/sys/src/libc/9syscall/sys.h" vlong	_sysargs[6*4];vlong _callsys(void); /* * syscalls */ intgetpid(void){	_sysargs[0] = -1;	return _callsys();} longpread(int fd, void *a, long n, vlong){	_sysargs[0] = PREAD;	_sysargs[1] = fd;	_sysargs[2] = (vlong)a;	_sysargs[3] = n;	return _callsys();} longpwrite(int fd, void *a, long n, vlong){	_sysargs[0] = PWRITE;	_sysargs[1] = fd;	_sysargs[2] = (vlong)a;	_sysargs[3] = n;	return _callsys();} intclose(int fd){	_sysargs[0] = CLOSE;	_sysargs[1] = fd;	return _callsys();} intopen(char *name, int mode){	_sysargs[0] = OPEN;	_sysargs[1] = (vlong)name;	_sysargs[2] = mode;	return _callsys();} intcreate(char *f, int mode, ulong perm){	_sysargs[0] = CREATE;	_sysargs[1] = (vlong)f;	_sysargs[2] = mode;	_sysargs[3] = perm;	return _callsys();} void_exits(char *s){	_sysargs[0] = EXITS;	_sysargs[1] = s!=nil? strlen(s): 0;	_callsys();} intdup(int f, int t){	_sysargs[0] = DUP;	_sysargs[1] = f;	_sysargs[2] = t;	return _callsys();} interrstr(char *buf, uint n){	_sysargs[0] = ERRSTR;	_sysargs[1] = (vlong)buf;	_sysargs[2] = n;	return _callsys();} intbrk_(void *a){	_sysargs[0] = BRK_;	_sysargs[1] = (vlong)a;	return _callsys();} void*sbrk(ulong n){	_sysargs[0] = -2;	_sysargs[1] = n;	return (void*)_callsys();}