diff --git a/sys/lib/acid/syscall b/sys/lib/acid/syscall
index ef69e64ef..1b1c35c50 100644
--- a/sys/lib/acid/syscall
+++ b/sys/lib/acid/syscall
@@ -88,48 +88,48 @@ syscalls = {
 	{ 6, {"alarm",		"D",		code(*sysalarm:list)}},
 	{ 7, {"exec",		"sS",		code(*sysexec:list)}},
 	{ 8, {"exits",		"s",		code(*sysexits:list)}},
-	{ 9, {"_fsession",	"DX",		code(*sys_fsession:list)}},
-	{10, {"fauth",		"DX",		code(*sysfauth:list)}},
-	{11, {"_fstat",		"DX",		code(*sys_fstat:list)}},
-	{12, {"segbrk",		"XX",		code(*syssegbrk:list)}},
+	{ 9, {"_fsession",	"DsD",		code(*sys_fsession:list)}},
+	{10, {"fauth",		"Ds",		code(*sysfauth:list)}},
+	{11, {"_fstat",		"DA",		code(*sys_fstat:list)}},
+	{12, {"segbrk",		"AA",		code(*syssegbrk:list)}},
 	{13, {"_mount",		"DsXs",		code(*sys_mount:list)}},
 	{14, {"open",		"sD",		code(*sysopen:list)}},
-	{15, {"_read",		"DXD",		code(*sys_read:list)}},
+	{15, {"_read",		"DAD",		code(*sys_read:list)}},
 	{16, {"oseek",		"DDD",		code(*sysoseek:list)}},
 	{17, {"sleep",		"D",		code(*syssleep:list)}},
-	{18, {"_stat",		"sX",		code(*sys_stat:list)}},
+	{18, {"_stat",		"sA",		code(*sys_stat:list)}},
 	{19, {"rfork",		"X",		code(*sysstat:list)}},
-	{20, {"_write",		"DXD",		code(*sys_write:list)}},
-	{21, {"pipe",		"X",		code(*syspipe:list)}},
+	{20, {"_write",		"DTD",		code(*sys_write:list)}},
+	{21, {"pipe",		"A",		code(*syspipe:list)}},
 	{22, {"create",		"sDO",		code(*syscreate:list)}},
-	{23, {"fd2path",	"DXD",		code(*sysfd2path:list)}},
-	{24, {"brk_",		"X",		code(*sysbrk_:list)}},
+	{23, {"fd2path",	"DAD",		code(*sysfd2path:list)}},
+	{24, {"brk_",		"A",		code(*sysbrk_:list)}},
 	{25, {"remove",		"s",		code(*sysremove:list)}},
-	{26, {"_wstat",		"sX",		code(*sys_wstat:list)}},
-	{27, {"_fwstat",	"DX",		code(*sys_fwstat:list)}},
-	{28, {"notify",		"X",		code(*sysnotify:list)}},
+	{26, {"_wstat",		"sA",		code(*sys_wstat:list)}},
+	{27, {"_fwstat",	"DA",		code(*sys_fwstat:list)}},
+	{28, {"notify",		"A",		code(*sysnotify:list)}},
 	{29, {"noted",		"D",		code(*sysnoted:list)}},
-	{30, {"segattach",	"DsXD",		code(*syssegattach:list)}},
-	{31, {"segdetach",	"X",		code(*syssegdetach:list)}},
-	{32, {"segfree",	"XD",		code(*syssegfree:list)}},
-	{33, {"segflush",	"XD",		code(*syssegflush:list)}},
-	{34, {"rendezvous",	"XX",		code(*sysrendezvous:list)}},
+	{30, {"segattach",	"DsAD",		code(*syssegattach:list)}},
+	{31, {"segdetach",	"A",		code(*syssegdetach:list)}},
+	{32, {"segfree",	"AD",		code(*syssegfree:list)}},
+	{33, {"segflush",	"AD",		code(*syssegflush:list)}},
+	{34, {"rendezvous",	"AA",		code(*sysrendezvous:list)}},
 	{35, {"unmount",	"ss",		code(*sysunmount:list)}},
-	{36, {"_wait",		"X",		code(*sys_wait:list)}},
-	{37, {"semacquire",	"XD",		code(*syssemacquire:list)}},
-	{38, {"semrelease",	"XD",		code(*syssemrelease:list)}},
-	{39, {"seek",		"XDVD",		code(*sysseek:list)}},
+	{36, {"_wait",		"A",		code(*sys_wait:list)}},
+	{37, {"semacquire",	"AD",		code(*syssemacquire:list)}},
+	{38, {"semrelease",	"AD",		code(*syssemrelease:list)}},
+	{39, {"seek",		"ADVD",		code(*sysseek:list)}},
 	{40, {"fversion",	"DDsD",		code(*sysfversion:list)}},
 	{41, {"errstr",		"TD",		code(*syserrstr:list)}},
-	{42, {"stat",		"sXD",		code(*sysstat:list)}},
-	{43, {"fstat",		"DXD",		code(*sysfstat:list)}},
-	{44, {"wstat",		"sXD",		code(*syswstat:list)}},
-	{45, {"fwstat",		"DXD",		code(*sysfwstat:list)}},
+	{42, {"stat",		"sAD",		code(*sysstat:list)}},
+	{43, {"fstat",		"DAD",		code(*sysfstat:list)}},
+	{44, {"wstat",		"sAD",		code(*syswstat:list)}},
+	{45, {"fwstat",		"DAD",		code(*sysfwstat:list)}},
 	{46, {"mount",		"DDsXs",	code(*sysmount:list)}},
 	{47, {"await",		"TD",		code(*sysawait:list)}},
-	{50, {"pread",		"DXDZ",		code(*syspread:list)}},
+	{50, {"pread",		"DADZ",		code(*syspread:list)}},
 	{51, {"pwrite",		"DTDZ",		code(*syspwrite:list)}},
-	{52, {"tsemacquire",	"XD",		code(*systsemacquire:list)}},
+	{52, {"tsemacquire",	"AD",		code(*systsemacquire:list)}},
 };
 
 defn syscall() {