casify, cleanup sys

R=r
OCL=22978
CL=22984

74 files changed, 430 insertions, 638 deletions

diff --git a/doc/progs/cat.go b/doc/progs/cat.go
index 98e4bbf1a..5925c8da2 100644
--- a/doc/progs/cat.go
+++ b/doc/progs/cat.go
@@ -16,7 +16,7 @@ func cat(file *fd.FD) {
 		switch nr, er := file.Read(buf); true {
 		case nr < 0:
 			print("error reading from ", file.String(), ": ", er.String(), "\n");
-			sys.exit(1);
+			sys.Exit(1);
 		case nr == 0:  // EOF
 			return;
 		case nr > 0:
@@ -36,7 +36,7 @@ func main() {
 		file, err := fd.Open(flag.Arg(i), 0, 0);
 		if file == nil {
 			print("can't open ", flag.Arg(i), ": error ", err, "\n");
-			sys.exit(1);
+			sys.Exit(1);
 		}
 		cat(file);
 		file.Close();
diff --git a/doc/progs/cat_rot13.go b/doc/progs/cat_rot13.go
index db0a32fa6..5381ebd72 100644
--- a/doc/progs/cat_rot13.go
+++ b/doc/progs/cat_rot13.go
@@ -59,7 +59,7 @@ func cat(r reader) {
 		switch nr, er := r.Read(buf); {
 		case nr < 0:
 			print("error reading from ", r.String(), ": ", er.String(), "\n");
-			sys.exit(1);
+			sys.Exit(1);
 		case nr == 0:  // EOF
 			return;
 		case nr > 0:
@@ -80,7 +80,7 @@ func main() {
 		file, err := fd.Open(flag.Arg(i), 0, 0);
 		if file == nil {
 			print("can't open ", flag.Arg(i), ": error ", err, "\n");
-			sys.exit(1);
+			sys.Exit(1);
 		}
 		cat(file);
 		file.Close();
diff --git a/doc/progs/helloworld3.go b/doc/progs/helloworld3.go
index f6decccbf..59aebc721 100644
--- a/doc/progs/helloworld3.go
+++ b/doc/progs/helloworld3.go
@@ -12,6 +12,6 @@ func main() {
 	file, err := fd.Open("/does/not/exist",  0,  0);
 	if file == nil {
 		print("can't open file; err=",  err.String(),  "\n");
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
diff --git a/src/cmd/gc/export.c b/src/cmd/gc/export.c
index f71f929b2..e2f2a284b 100644
--- a/src/cmd/gc/export.c
+++ b/src/cmd/gc/export.c
@@ -355,7 +355,10 @@ pkgtype(char *name, char *pkg)
 static int
 mypackage(Node *ss)
 {
-	return strcmp(ss->psym->name, package) == 0;
+	// we import all definitions for sys.
+	// lowercase ones can only be used by the compiler.
+	return strcmp(ss->psym->name, package) == 0
+		|| strcmp(ss->psym->name, "sys") == 0;
 }
 
 void
diff --git a/src/cmd/gc/sys.go b/src/cmd/gc/sys.go
index b61536a2e..7b2e3ad2e 100644
--- a/src/cmd/gc/sys.go
+++ b/src/cmd/gc/sys.go
@@ -7,102 +7,97 @@ package PACKAGE
 
 // emitted by compiler, not referred to by go programs
 
-export func	mal(int32) *any;
-export func	throwindex();
-export func	throwreturn();
-export func	panicl(int32);
-
-export func	printbool(bool);
-export func	printfloat(float64);
-export func	printint(int64);
-export func	printstring(string);
-export func	printpointer(*any);
-export func	printinter(any);
-export func	printarray(any);
-export func	printnl();
-export func	printsp();
-
-export func	catstring(string, string) string;
-export func	cmpstring(string, string) int;
-export func	slicestring(string, int, int) string;
-export func	indexstring(string, int) byte;
-export func	intstring(int64) string;
-export func	byteastring(*byte, int) string;
-export func	arraystring([]byte) string;
-
-export func	ifaceT2I(sigi *byte, sigt *byte, elem any) (ret any);
-export func	ifaceI2T(sigt *byte, iface any) (ret any);
-export func	ifaceI2T2(sigt *byte, iface any) (ret any, ok bool);
-export func	ifaceI2I(sigi *byte, iface any) (ret any);
-export func	ifaceI2I2(sigi *byte, iface any) (ret any, ok bool);
-export func	ifaceeq(i1 any, i2 any) (ret bool);
-
-export func	newmap(keysize int, valsize int,
+func	mal(int32) *any;
+func	throwindex();
+func	throwreturn();
+func	panicl(int32);
+
+func	printbool(bool);
+func	printfloat(float64);
+func	printint(int64);
+func	printstring(string);
+func	printpointer(*any);
+func	printinter(any);
+func	printarray(any);
+func	printnl();
+func	printsp();
+
+func	catstring(string, string) string;
+func	cmpstring(string, string) int;
+func	slicestring(string, int, int) string;
+func	indexstring(string, int) byte;
+func	intstring(int64) string;
+func	byteastring(*byte, int) string;
+func	arraystring([]byte) string;
+
+func	ifaceT2I(sigi *byte, sigt *byte, elem any) (ret any);
+func	ifaceI2T(sigt *byte, iface any) (ret any);
+func	ifaceI2T2(sigt *byte, iface any) (ret any, ok bool);
+func	ifaceI2I(sigi *byte, iface any) (ret any);
+func	ifaceI2I2(sigi *byte, iface any) (ret any, ok bool);
+func	ifaceeq(i1 any, i2 any) (ret bool);
+
+func	newmap(keysize int, valsize int,
 			keyalg int, valalg int,
 			hint int) (hmap map[any]any);
-export func	mapaccess1(hmap map[any]any, key any) (val any);
-export func	mapaccess2(hmap map[any]any, key any) (val any, pres bool);
-export func	mapassign1(hmap map[any]any, key any, val any);
-export func	mapassign2(hmap map[any]any, key any, val any, pres bool);
-export func	mapiterinit(hmap map[any]any, hiter *any);
-export func	mapiternext(hiter *any);
-export func	mapiter1(hiter *any) (key any);
-export func	mapiter2(hiter *any) (key any, val any);
-
-export func	newchan(elemsize int, elemalg int, hint int) (hchan chan any);
-export func	chanrecv1(hchan chan any) (elem any);
-export func	chanrecv2(hchan chan any) (elem any, pres bool);
-export func	chanrecv3(hchan chan any, elem *any) (pres bool);
-export func	chansend1(hchan chan any, elem any);
-export func	chansend2(hchan chan any, elem any) (pres bool);
-
-export func	newselect(size int) (sel *byte);
-export func	selectsend(sel *byte, hchan chan any, elem any) (selected bool);
-export func	selectrecv(sel *byte, hchan chan any, elem *any) (selected bool);
-export func	selectdefault(sel *byte) (selected bool);
-export func	selectgo(sel *byte);
-
-export func	newarray(nel int, cap int, width int) (ary []any);
-export func	arraysliced(old []any, lb int, hb int, width int) (ary []any);
-export func	arrayslices(old *any, nel int, lb int, hb int, width int) (ary []any);
-export func	arrays2d(old *any, nel int) (ary []any);
+func	mapaccess1(hmap map[any]any, key any) (val any);
+func	mapaccess2(hmap map[any]any, key any) (val any, pres bool);
+func	mapassign1(hmap map[any]any, key any, val any);
+func	mapassign2(hmap map[any]any, key any, val any, pres bool);
+func	mapiterinit(hmap map[any]any, hiter *any);
+func	mapiternext(hiter *any);
+func	mapiter1(hiter *any) (key any);
+func	mapiter2(hiter *any) (key any, val any);
+
+func	newchan(elemsize int, elemalg int, hint int) (hchan chan any);
+func	chanrecv1(hchan chan any) (elem any);
+func	chanrecv2(hchan chan any) (elem any, pres bool);
+func	chanrecv3(hchan chan any, elem *any) (pres bool);
+func	chansend1(hchan chan any, elem any);
+func	chansend2(hchan chan any, elem any) (pres bool);
+
+func	newselect(size int) (sel *byte);
+func	selectsend(sel *byte, hchan chan any, elem any) (selected bool);
+func	selectrecv(sel *byte, hchan chan any, elem *any) (selected bool);
+func	selectdefault(sel *byte) (selected bool);
+func	selectgo(sel *byte);
+
+func	newarray(nel int, cap int, width int) (ary []any);
+func	arraysliced(old []any, lb int, hb int, width int) (ary []any);
+func	arrayslices(old *any, nel int, lb int, hb int, width int) (ary []any);
+func	arrays2d(old *any, nel int) (ary []any);
 
 // used by go programs
 
-export func	breakpoint();
+export func	Breakpoint();
 
-export func	reflect(i interface { }) (uint64, string, bool);
-export func	unreflect(uint64, string, bool) (ret interface { });
+export func	Reflect(i interface { }) (uint64, string, bool);
+export func	Unreflect(uint64, string, bool) (ret interface { });
 
-export func	argc() int;
-export func	envc() int;
-export func	argv(int) string;
-export func	envv(int) string;
+export var	Args []string;
+export var	Envs []string;
 
-export func	frexp(float64) (float64, int);		// break fp into exp,fract
-export func	ldexp(float64, int) float64;		// make fp from exp,fract
-export func	modf(float64) (float64, float64);	// break fp into double.double
-export func	isInf(float64, int) bool;		// test for infinity
-export func	isNaN(float64) bool;			// test for not-a-number
+export func	Frexp(float64) (float64, int);		// break fp into exp,fract
+export func	Ldexp(float64, int) float64;		// make fp from exp,fract
+export func	Modf(float64) (float64, float64);	// break fp into double.double
+export func	IsInf(float64, int) bool;		// test for infinity
+export func	IsNaN(float64) bool;			// test for not-a-number
 export func	Inf(int) float64;			// return signed Inf
 export func	NaN() float64;				// return a NaN
-export func	float32bits(float32) uint32;		// raw bits
-export func	float64bits(float64) uint64;		// raw bits
-export func	float32frombits(uint32) float32;	// raw bits
-export func	float64frombits(uint64) float64;	// raw bits
+export func	Float32bits(float32) uint32;		// raw bits
+export func	Float64bits(float64) uint64;		// raw bits
+export func	Float32frombits(uint32) float32;	// raw bits
+export func	Float64frombits(uint64) float64;	// raw bits
 
-export func	gosched();
-export func	goexit();
+export func	Gosched();
+export func	Goexit();
 
-export func	readfile(string) (string, bool);	// read file into string; boolean status
-export func	writefile(string, string) (bool);	// write string into file; boolean status
-export func	bytestorune(*byte, int, int) (int, int);	// convert bytes to runes
-export func	stringtorune(string, int) (int, int);	// convert bytes to runes
+export func	BytesToRune(*byte, int, int) (int, int);	// convert bytes to runes
+export func	StringToRune(string, int) (int, int);	// convert bytes to runes
 
-export func	exit(int);
+export func	Exit(int);
 
-export func	symdat() (symtab []byte, pclntab []byte);
-export func	caller(n int) (pc uint64, file string, line int, ok bool);
+export func	Caller(n int) (pc uint64, file string, line int, ok bool);
 
-export func	semacquire(sema *int32);
-export func	semrelease(sema *int32);
+export func	SemAcquire(sema *int32);
+export func	SemRelease(sema *int32);
diff --git a/src/cmd/gc/sysimport.c b/src/cmd/gc/sysimport.c
index 5436e2418..533c25799 100644
--- a/src/cmd/gc/sysimport.c
+++ b/src/cmd/gc/sysimport.c
@@ -1,84 +1,79 @@
 char *sysimport =
 	"package sys\n"
-	"export func sys.mal (? int32) (? *any)\n"
-	"export func sys.throwindex ()\n"
-	"export func sys.throwreturn ()\n"
-	"export func sys.panicl (? int32)\n"
-	"export func sys.printbool (? bool)\n"
-	"export func sys.printfloat (? float64)\n"
-	"export func sys.printint (? int64)\n"
-	"export func sys.printstring (? string)\n"
-	"export func sys.printpointer (? *any)\n"
-	"export func sys.printinter (? any)\n"
-	"export func sys.printarray (? any)\n"
-	"export func sys.printnl ()\n"
-	"export func sys.printsp ()\n"
-	"export func sys.catstring (? string, ? string) (? string)\n"
-	"export func sys.cmpstring (? string, ? string) (? int)\n"
-	"export func sys.slicestring (? string, ? int, ? int) (? string)\n"
-	"export func sys.indexstring (? string, ? int) (? uint8)\n"
-	"export func sys.intstring (? int64) (? string)\n"
-	"export func sys.byteastring (? *uint8, ? int) (? string)\n"
-	"export func sys.arraystring (? []uint8) (? string)\n"
-	"export func sys.ifaceT2I (sigi *uint8, sigt *uint8, elem any) (ret any)\n"
-	"export func sys.ifaceI2T (sigt *uint8, iface any) (ret any)\n"
-	"export func sys.ifaceI2T2 (sigt *uint8, iface any) (ret any, ok bool)\n"
-	"export func sys.ifaceI2I (sigi *uint8, iface any) (ret any)\n"
-	"export func sys.ifaceI2I2 (sigi *uint8, iface any) (ret any, ok bool)\n"
-	"export func sys.ifaceeq (i1 any, i2 any) (ret bool)\n"
-	"export func sys.newmap (keysize int, valsize int, keyalg int, valalg int, hint int) (hmap map[any] any)\n"
-	"export func sys.mapaccess1 (hmap map[any] any, key any) (val any)\n"
-	"export func sys.mapaccess2 (hmap map[any] any, key any) (val any, pres bool)\n"
-	"export func sys.mapassign1 (hmap map[any] any, key any, val any)\n"
-	"export func sys.mapassign2 (hmap map[any] any, key any, val any, pres bool)\n"
-	"export func sys.mapiterinit (hmap map[any] any, hiter *any)\n"
-	"export func sys.mapiternext (hiter *any)\n"
-	"export func sys.mapiter1 (hiter *any) (key any)\n"
-	"export func sys.mapiter2 (hiter *any) (key any, val any)\n"
-	"export func sys.newchan (elemsize int, elemalg int, hint int) (hchan chan any)\n"
-	"export func sys.chanrecv1 (hchan chan any) (elem any)\n"
-	"export func sys.chanrecv2 (hchan chan any) (elem any, pres bool)\n"
-	"export func sys.chanrecv3 (hchan chan any, elem *any) (pres bool)\n"
-	"export func sys.chansend1 (hchan chan any, elem any)\n"
-	"export func sys.chansend2 (hchan chan any, elem any) (pres bool)\n"
-	"export func sys.newselect (size int) (sel *uint8)\n"
-	"export func sys.selectsend (sel *uint8, hchan chan any, elem any) (selected bool)\n"
-	"export func sys.selectrecv (sel *uint8, hchan chan any, elem *any) (selected bool)\n"
-	"export func sys.selectdefault (sel *uint8) (selected bool)\n"
-	"export func sys.selectgo (sel *uint8)\n"
-	"export func sys.newarray (nel int, cap int, width int) (ary []any)\n"
-	"export func sys.arraysliced (old []any, lb int, hb int, width int) (ary []any)\n"
-	"export func sys.arrayslices (old *any, nel int, lb int, hb int, width int) (ary []any)\n"
-	"export func sys.arrays2d (old *any, nel int) (ary []any)\n"
-	"export func sys.breakpoint ()\n"
-	"export func sys.reflect (i interface { }) (? uint64, ? string, ? bool)\n"
-	"export func sys.unreflect (? uint64, ? string, ? bool) (ret interface { })\n"
-	"export func sys.argc () (? int)\n"
-	"export func sys.envc () (? int)\n"
-	"export func sys.argv (? int) (? string)\n"
-	"export func sys.envv (? int) (? string)\n"
-	"export func sys.frexp (? float64) (? float64, ? int)\n"
-	"export func sys.ldexp (? float64, ? int) (? float64)\n"
-	"export func sys.modf (? float64) (? float64, ? float64)\n"
-	"export func sys.isInf (? float64, ? int) (? bool)\n"
-	"export func sys.isNaN (? float64) (? bool)\n"
+	"package func sys.mal (? int32) (? *any)\n"
+	"package func sys.throwindex ()\n"
+	"package func sys.throwreturn ()\n"
+	"package func sys.panicl (? int32)\n"
+	"package func sys.printbool (? bool)\n"
+	"package func sys.printfloat (? float64)\n"
+	"package func sys.printint (? int64)\n"
+	"package func sys.printstring (? string)\n"
+	"package func sys.printpointer (? *any)\n"
+	"package func sys.printinter (? any)\n"
+	"package func sys.printarray (? any)\n"
+	"package func sys.printnl ()\n"
+	"package func sys.printsp ()\n"
+	"package func sys.catstring (? string, ? string) (? string)\n"
+	"package func sys.cmpstring (? string, ? string) (? int)\n"
+	"package func sys.slicestring (? string, ? int, ? int) (? string)\n"
+	"package func sys.indexstring (? string, ? int) (? uint8)\n"
+	"package func sys.intstring (? int64) (? string)\n"
+	"package func sys.byteastring (? *uint8, ? int) (? string)\n"
+	"package func sys.arraystring (? []uint8) (? string)\n"
+	"package func sys.ifaceT2I (sigi *uint8, sigt *uint8, elem any) (ret any)\n"
+	"package func sys.ifaceI2T (sigt *uint8, iface any) (ret any)\n"
+	"package func sys.ifaceI2T2 (sigt *uint8, iface any) (ret any, ok bool)\n"
+	"package func sys.ifaceI2I (sigi *uint8, iface any) (ret any)\n"
+	"package func sys.ifaceI2I2 (sigi *uint8, iface any) (ret any, ok bool)\n"
+	"package func sys.ifaceeq (i1 any, i2 any) (ret bool)\n"
+	"package func sys.newmap (keysize int, valsize int, keyalg int, valalg int, hint int) (hmap map[any] any)\n"
+	"package func sys.mapaccess1 (hmap map[any] any, key any) (val any)\n"
+	"package func sys.mapaccess2 (hmap map[any] any, key any) (val any, pres bool)\n"
+	"package func sys.mapassign1 (hmap map[any] any, key any, val any)\n"
+	"package func sys.mapassign2 (hmap map[any] any, key any, val any, pres bool)\n"
+	"package func sys.mapiterinit (hmap map[any] any, hiter *any)\n"
+	"package func sys.mapiternext (hiter *any)\n"
+	"package func sys.mapiter1 (hiter *any) (key any)\n"
+	"package func sys.mapiter2 (hiter *any) (key any, val any)\n"
+	"package func sys.newchan (elemsize int, elemalg int, hint int) (hchan chan any)\n"
+	"package func sys.chanrecv1 (hchan chan any) (elem any)\n"
+	"package func sys.chanrecv2 (hchan chan any) (elem any, pres bool)\n"
+	"package func sys.chanrecv3 (hchan chan any, elem *any) (pres bool)\n"
+	"package func sys.chansend1 (hchan chan any, elem any)\n"
+	"package func sys.chansend2 (hchan chan any, elem any) (pres bool)\n"
+	"package func sys.newselect (size int) (sel *uint8)\n"
+	"package func sys.selectsend (sel *uint8, hchan chan any, elem any) (selected bool)\n"
+	"package func sys.selectrecv (sel *uint8, hchan chan any, elem *any) (selected bool)\n"
+	"package func sys.selectdefault (sel *uint8) (selected bool)\n"
+	"package func sys.selectgo (sel *uint8)\n"
+	"package func sys.newarray (nel int, cap int, width int) (ary []any)\n"
+	"package func sys.arraysliced (old []any, lb int, hb int, width int) (ary []any)\n"
+	"package func sys.arrayslices (old *any, nel int, lb int, hb int, width int) (ary []any)\n"
+	"package func sys.arrays2d (old *any, nel int) (ary []any)\n"
+	"export func sys.Breakpoint ()\n"
+	"export func sys.Reflect (i interface { }) (? uint64, ? string, ? bool)\n"
+	"export func sys.Unreflect (? uint64, ? string, ? bool) (ret interface { })\n"
+	"export var sys.Args []string\n"
+	"export var sys.Envs []string\n"
+	"export func sys.Frexp (? float64) (? float64, ? int)\n"
+	"export func sys.Ldexp (? float64, ? int) (? float64)\n"
+	"export func sys.Modf (? float64) (? float64, ? float64)\n"
+	"export func sys.IsInf (? float64, ? int) (? bool)\n"
+	"export func sys.IsNaN (? float64) (? bool)\n"
 	"export func sys.Inf (? int) (? float64)\n"
 	"export func sys.NaN () (? float64)\n"
-	"export func sys.float32bits (? float32) (? uint32)\n"
-	"export func sys.float64bits (? float64) (? uint64)\n"
-	"export func sys.float32frombits (? uint32) (? float32)\n"
-	"export func sys.float64frombits (? uint64) (? float64)\n"
-	"export func sys.gosched ()\n"
-	"export func sys.goexit ()\n"
-	"export func sys.readfile (? string) (? string, ? bool)\n"
-	"export func sys.writefile (? string, ? string) (? bool)\n"
-	"export func sys.bytestorune (? *uint8, ? int, ? int) (? int, ? int)\n"
-	"export func sys.stringtorune (? string, ? int) (? int, ? int)\n"
-	"export func sys.exit (? int)\n"
-	"export func sys.symdat () (symtab []uint8, pclntab []uint8)\n"
-	"export func sys.caller (n int) (pc uint64, file string, line int, ok bool)\n"
-	"export func sys.semacquire (sema *int32)\n"
-	"export func sys.semrelease (sema *int32)\n"
+	"export func sys.Float32bits (? float32) (? uint32)\n"
+	"export func sys.Float64bits (? float64) (? uint64)\n"
+	"export func sys.Float32frombits (? uint32) (? float32)\n"
+	"export func sys.Float64frombits (? uint64) (? float64)\n"
+	"export func sys.Gosched ()\n"
+	"export func sys.Goexit ()\n"
+	"export func sys.BytesToRune (? *uint8, ? int, ? int) (? int, ? int)\n"
+	"export func sys.StringToRune (? string, ? int) (? int, ? int)\n"
+	"export func sys.Exit (? int)\n"
+	"export func sys.Caller (n int) (pc uint64, file string, line int, ok bool)\n"
+	"export func sys.SemAcquire (sema *int32)\n"
+	"export func sys.SemRelease (sema *int32)\n"
 	"\n"
 	"$$\n";
 char *unsafeimport =
diff --git a/src/lib/flag.go b/src/lib/flag.go
index 3274a854e..90784e711 100644
--- a/src/lib/flag.go
+++ b/src/lib/flag.go
@@ -239,13 +239,13 @@ export func PrintDefaults() {
 }
 
 export func Usage() {
-	if sys.argc() > 0 {
-		print("Usage of ", sys.argv(0), ": \n");
+	if len(sys.Args) > 0 {
+		print("Usage of ", sys.Args[0], ": \n");
 	} else {
 		print("Usage: \n");
 	}
 	PrintDefaults();
-	sys.exit(1);
+	sys.Exit(1);
 }
 
 export func NFlag() int {
@@ -254,14 +254,14 @@ export func NFlag() int {
 
 export func Arg(i int) string {
 	i += flags.first_arg;
-	if i < 0 || i >= sys.argc() {
+	if i < 0 || i >= len(sys.Args) {
 		return "";
 	}
-	return sys.argv(i)
+	return sys.Args[i]
 }
 
 export func NArg() int {
-	return sys.argc() - flags.first_arg
+	return len(sys.Args) - flags.first_arg
 }
 
 func add(name string, value _Value, usage string) {
@@ -339,7 +339,7 @@ export func StringVar(p *string, name, value string, usage string) {
 
 func (f *allFlags) ParseOne(index int) (ok bool, next int)
 {
-	s := sys.argv(index);
+	s := sys.Args[index];
 	f.first_arg = index;  // until proven otherwise
 	if len(s) == 0 {
 		return false, -1
@@ -398,11 +398,11 @@ func (f *allFlags) ParseOne(index int) (ok bool, next int)
 		}
 	} else {
 		// It must have a value, which might be the next argument.
-		if !has_value && index < sys.argc()-1 {
+		if !has_value && index < len(sys.Args)-1 {
 			// value is the next arg
 			has_value = true;
 			index++;
-			value = sys.argv(index);
+			value = sys.Args[index];
 		}
 		if !has_value {
 			print("flag needs an argument: -", name, "\n");
@@ -433,7 +433,7 @@ func (f *allFlags) ParseOne(index int) (ok bool, next int)
 }
 
 export func Parse() {
-	for i := 1; i < sys.argc(); {
+	for i := 1; i < len(sys.Args); {
 		ok, next := flags.ParseOne(i);
 		if next > 0 {
 			flags.first_arg = next;
diff --git a/src/lib/fmt/print.go b/src/lib/fmt/print.go
index 67d56e1c1..0e7569731 100644
--- a/src/lib/fmt/print.go
+++ b/src/lib/fmt/print.go
@@ -14,6 +14,7 @@ import (
 	"io";
 	"reflect";
 	"os";
+	"utf8";
 )
 
 // Representation of printer state passed to custom formatters.
@@ -438,7 +439,7 @@ func (p *pp) doprintf(format string, v reflect.StructValue) {
 	end := len(format) - 1;
 	fieldnum := 0;	// we process one field per non-trivial format
 	for i := 0; i <= end;  {
-		c, w := sys.stringtorune(format, i);
+		c, w := utf8.DecodeRuneInString(format, i);
 		if c != '%' || i == end {
 			p.add(c);
 			i += w;
@@ -469,7 +470,7 @@ func (p *pp) doprintf(format string, v reflect.StructValue) {
 		if i < end && format[i] == '.' {
 			p.fmt.prec, p.fmt.prec_present, i = parsenum(format, i+1, end);
 		}
-		c, w = sys.stringtorune(format, i);
+		c, w = utf8.DecodeRuneInString(format, i);
 		i += w;
 		// percent is special - absorbs no operand
 		if c == '%' {
diff --git a/src/lib/math/exp.go b/src/lib/math/exp.go
index efc17aec0..b2697195e 100644
--- a/src/lib/math/exp.go
+++ b/src/lib/math/exp.go
@@ -101,9 +101,9 @@ export func Exp(x float64) float64 {
 
 	// special cases
 	switch {
-	case sys.isNaN(x) || sys.isInf(x, 1):
+	case sys.IsNaN(x) || sys.IsInf(x, 1):
 		return x;
-	case sys.isInf(x, -1):
+	case sys.IsInf(x, -1):
 		return 0;
 	case x > Overflow:
 		return sys.Inf(1);
@@ -129,6 +129,6 @@ export func Exp(x float64) float64 {
 	t := r * r;
 	c := r - t*(P1+t*(P2+t*(P3+t*(P4+t*P5))));
 	y := 1 - ((lo - (r*c)/(2-c)) - hi);
-	// TODO(rsc): make sure sys.ldexp can handle boundary k
-	return sys.ldexp(y, k);
+	// TODO(rsc): make sure sys.Ldexp can handle boundary k
+	return sys.Ldexp(y, k);
 }
diff --git a/src/lib/math/floor.go b/src/lib/math/floor.go
index 421c29299..14b390841 100644
--- a/src/lib/math/floor.go
+++ b/src/lib/math/floor.go
@@ -11,13 +11,13 @@ package math
 
 export func Floor(arg float64) float64 {
 	if arg < 0 {
-		d, fract := sys.modf(-arg);
+		d, fract := sys.Modf(-arg);
 		if fract != 0.0 {
 			d = d+1;
 		}
 		return -d;
 	}
-	d, fract := sys.modf(arg);
+	d, fract := sys.Modf(arg);
 	return d;
 }
 
diff --git a/src/lib/math/fmod.go b/src/lib/math/fmod.go
index 488ee4321..ae35e719f 100644
--- a/src/lib/math/fmod.go
+++ b/src/lib/math/fmod.go
@@ -16,7 +16,7 @@ export func Fmod(x, y float64) float64 {
 		y = -y;
 	}
 
-	yfr, yexp := sys.frexp(y);
+	yfr, yexp := sys.Frexp(y);
 	sign := false;
 	r := x;
 	if x < 0 {
@@ -25,11 +25,11 @@ export func Fmod(x, y float64) float64 {
 	}
 
 	for r >= y {
-		rfr, rexp := sys.frexp(r);
+		rfr, rexp := sys.Frexp(r);
 		if rfr < yfr {
 			rexp = rexp - 1;
 		}
-		r = r - sys.ldexp(y, rexp-yexp);
+		r = r - sys.Ldexp(y, rexp-yexp);
 	}
 	if sign {
 		r = -r;
diff --git a/src/lib/math/log.go b/src/lib/math/log.go
index 5eee5daec..259ecd202 100644
--- a/src/lib/math/log.go
+++ b/src/lib/math/log.go
@@ -85,7 +85,7 @@ export func Log(x float64) float64 {
 
 	// special cases
 	switch {
-	case sys.isNaN(x) || sys.isInf(x, 1):
+	case sys.IsNaN(x) || sys.IsInf(x, 1):
 		return x;
 	case x < 0:
 		return sys.NaN();
@@ -94,7 +94,7 @@ export func Log(x float64) float64 {
 	}
 
 	// reduce
-	f1, ki := sys.frexp(x);
+	f1, ki := sys.Frexp(x);
 	if f1 < Sqrt2/2 {
 		f1 *= 2;
 		ki--;
diff --git a/src/lib/math/pow.go b/src/lib/math/pow.go
index 22f2aa996..b5c67d88c 100644
--- a/src/lib/math/pow.go
+++ b/src/lib/math/pow.go
@@ -30,7 +30,7 @@ export func Pow(x, y float64) float64 {
 		absy = -absy;
 		flip = true;
 	}
-	yi, yf := sys.modf(absy);
+	yi, yf := sys.Modf(absy);
 	if yf != 0 && x < 0 {
 		return sys.NaN();
 	}
@@ -55,7 +55,7 @@ export func Pow(x, y float64) float64 {
 	// by multiplying in successive squarings
 	// of x according to bits of yi.
 	// accumulate powers of two into exp.
-	x1, xe := sys.frexp(x);
+	x1, xe := sys.Frexp(x);
 	for i := int64(yi); i != 0; i >>= 1 {
 		if i&1 == 1 {
 			a1 *= x1;
@@ -76,5 +76,5 @@ export func Pow(x, y float64) float64 {
 		a1 = 1 / a1;
 		ae = -ae;
 	}
-	return sys.ldexp(a1, ae);
+	return sys.Ldexp(a1, ae);
 }
diff --git a/src/lib/math/sin.go b/src/lib/math/sin.go
index 6e3fbb28f..b6a074242 100644
--- a/src/lib/math/sin.go
+++ b/src/lib/math/sin.go
@@ -29,9 +29,9 @@ func sinus(arg float64, quad int) float64 {
 	var y float64;
 	if x > 32764 {
 		var e float64;
-		e, y = sys.modf(x);
+		e, y = sys.Modf(x);
 		e = e + float64(quad);
-		temp1, f := sys.modf(0.25*e);
+		temp1, f := sys.Modf(0.25*e);
 		quad = int(e - 4*f);
 	} else {
 		k := int32(x);
diff --git a/src/lib/math/sqrt.go b/src/lib/math/sqrt.go
index 6459b31ac..698639781 100644
--- a/src/lib/math/sqrt.go
+++ b/src/lib/math/sqrt.go
@@ -12,7 +12,7 @@ package math
  */
 
 export func Sqrt(arg float64) float64 {
-	if sys.isInf(arg, 1) {
+	if sys.IsInf(arg, 1) {
 		return arg;
 	}
 
@@ -23,7 +23,7 @@ export func Sqrt(arg float64) float64 {
 		return 0;
 	}
 
-	x,exp := sys.frexp(arg);
+	x,exp := sys.Frexp(arg);
 	for x < 0.5 {
 		x = x*2;
 		exp = exp-1;
diff --git a/src/lib/math/tan.go b/src/lib/math/tan.go
index ddfe80d0f..bae194bcb 100644
--- a/src/lib/math/tan.go
+++ b/src/lib/math/tan.go
@@ -33,7 +33,7 @@ export func Tan(arg float64) float64 {
 	}
 	x = x * (4/Pi);   /* overflow? */
 	var e float64;
-	e, x = sys.modf(x);
+	e, x = sys.Modf(x);
 	i := int32(e);
 
 	switch i & 3 {
diff --git a/src/lib/os/os_env.go b/src/lib/os/os_env.go
index 8559373ac..26cb11a47 100644
--- a/src/lib/os/os_env.go
+++ b/src/lib/os/os_env.go
@@ -18,10 +18,9 @@ export func Getenv(s string) (v string, err *Error) {
 	if n == 0 {
 		return "", EINVAL
 	}
-	for i := 0; i < sys.envc(); i++ {
-		e := sys.envv(i);
-		if len(e) > n && e[n] == '=' && e[0 : n] == s {
-			return e[n+1 : len(e)], nil
+	for i, e := range sys.Envs {
+		if len(e) > n && e[n] == '=' && e[0:n] == s {
+			return e[n+1:len(e)], nil
 		}
 	}
 	return "", ENOENV
diff --git a/src/lib/reflect/type.go b/src/lib/reflect/type.go
index 87751547e..a7e8f7f31 100644
--- a/src/lib/reflect/type.go
+++ b/src/lib/reflect/type.go
@@ -7,13 +7,16 @@
 
 package reflect
 
-import "sync"
+import (
+	"utf8";
+	"sync";
+)
 
 export type Type interface
 
 export func ExpandType(name string) Type
 
-export func typestrings() string	// implemented in C; declared here
+func typestrings() string	// implemented in C; declared here
 
 export const (
 	MissingKind = iota;
@@ -577,7 +580,7 @@ func (p *typeParser) Next() {
 		return;
 	}
 	start := p.index;
-	c, w := sys.stringtorune(p.str, p.index);
+	c, w := utf8.DecodeRuneInString(p.str, p.index);
 	p.index += w;
 	switch {
 	case c == '<':
diff --git a/src/lib/reflect/value.go b/src/lib/reflect/value.go
index 63752d84d..ebd3c5f4a 100644
--- a/src/lib/reflect/value.go
+++ b/src/lib/reflect/value.go
@@ -48,12 +48,12 @@ func (c *commonValue) Addr() Addr {
 func (c *commonValue) Interface() interface {} {
 	var i interface {};
 	if c.typ.Size() > 8 {	// TODO(rsc): how do we know it is 8?
-		i = sys.unreflect(c.addr.(uintptr).(uint64), c.typ.String(), true);
+		i = sys.Unreflect(c.addr.(uintptr).(uint64), c.typ.String(), true);
 	} else {
 		if uintptr(c.addr) == 0 {
 			panicln("reflect: address 0 for", c.typ.String());
 		}
-		i = sys.unreflect(uint64(uintptr(*c.addr.(*Addr))), c.typ.String(), false);
+		i = sys.Unreflect(uint64(uintptr(*c.addr.(*Addr))), c.typ.String(), false);
 	}
 	return i;
 }
@@ -876,7 +876,7 @@ export func CopyArray(dst ArrayValue, src ArrayValue, n int) {
 
 
 export func NewValue(e interface {}) Value {
-	value, typestring, indir := sys.reflect(e);
+	value, typestring, indir := sys.Reflect(e);
 	typ, ok := typecache[typestring];
 	if !ok {
 		typ = ParseTypeString("", typestring);
diff --git a/src/lib/regexp/regexp.go b/src/lib/regexp/regexp.go
index 4162f9f38..e83860314 100644
--- a/src/lib/regexp/regexp.go
+++ b/src/lib/regexp/regexp.go
@@ -7,8 +7,9 @@
 package regexp
 
 import (
-	"os";
 	"array";
+	"os";
+	"utf8";
 )
 
 var debug = false;
@@ -215,7 +216,7 @@ func (nop *_Nop) Print() { print("nop") }
 func (re *_RE) Error(err *os.Error) {
 	re.error = err;
 	re.ch <- re;
-	sys.goexit();
+	sys.Goexit();
 }
 
 func (re *_RE) Add(i instr) instr {
@@ -241,7 +242,7 @@ func (p *parser) nextc() int {
 	if p.pos >= len(p.re.expr) {
 		p.ch = endOfFile
 	} else {
-		c, w := sys.stringtorune(p.re.expr, p.pos);
+		c, w := utf8.DecodeRuneInString(p.re.expr, p.pos);
 		p.ch = c;
 		p.pos += w;
 	}
@@ -653,7 +654,7 @@ func (re *_RE) DoExecute(str string, pos int) []int {
 		charwidth := 1;
 		c := endOfFile;
 		if pos < len(str) {
-			c, charwidth = sys.stringtorune(str, pos);
+			c, charwidth = utf8.DecodeRuneInString(str, pos);
 		}
 		for i := 0; i < len(s[in]); i++ {
 			st := s[in][i];
diff --git a/src/lib/strconv/atof.go b/src/lib/strconv/atof.go
index cb034f088..147b7955b 100644
--- a/src/lib/strconv/atof.go
+++ b/src/lib/strconv/atof.go
@@ -329,7 +329,7 @@ export func Atof64(s string) (f float64, err *os.Error) {
 		}
 	}
 	b, ovf := decimalToFloatBits(neg, d, trunc, &float64info);
-	f = sys.float64frombits(b);
+	f = sys.Float64frombits(b);
 	if ovf {
 		err = os.ERANGE;
 	}
@@ -347,7 +347,7 @@ export func Atof32(s string) (f float32, err *os.Error) {
 		}
 	}
 	b, ovf := decimalToFloatBits(neg, d, trunc, &float32info);
-	f = sys.float32frombits(uint32(b));
+	f = sys.Float32frombits(uint32(b));
 	if ovf {
 		err = os.ERANGE;
 	}
diff --git a/src/lib/strconv/ftoa.go b/src/lib/strconv/ftoa.go
index f826d944c..355680fb7 100644
--- a/src/lib/strconv/ftoa.go
+++ b/src/lib/strconv/ftoa.go
@@ -41,11 +41,11 @@ func floatsize() int {
 export var FloatSize = floatsize()
 
 export func Ftoa32(f float32, fmt byte, prec int) string {
-	return genericFtoa(uint64(sys.float32bits(f)), fmt, prec, &float32info);
+	return genericFtoa(uint64(sys.Float32bits(f)), fmt, prec, &float32info);
 }
 
 export func Ftoa64(f float64, fmt byte, prec int) string {
-	return genericFtoa(sys.float64bits(f), fmt, prec, &float64info);
+	return genericFtoa(sys.Float64bits(f), fmt, prec, &float64info);
 }
 
 export func Ftoa(f float, fmt byte, prec int) string {
diff --git a/src/lib/sync/mutex.go b/src/lib/sync/mutex.go
index accf55a76..68db0b697 100644
--- a/src/lib/sync/mutex.go
+++ b/src/lib/sync/mutex.go
@@ -4,7 +4,9 @@
 
 package sync
 
-package func cas(val *int32, old, new int32) bool
+func cas(val *int32, old, new int32) bool
+func semacquire(*int32)
+func semrelease(*int32)
 
 export type Mutex struct {
 	key int32;
@@ -26,7 +28,7 @@ func (m *Mutex) Lock() {
 		// changed from 0 to 1; we hold lock
 		return;
 	}
-	sys.semacquire(&m.sema);
+	semacquire(&m.sema);
 }
 
 func (m *Mutex) Unlock() {
@@ -34,6 +36,6 @@ func (m *Mutex) Unlock() {
 		// changed from 1 to 0; no contention
 		return;
 	}
-	sys.semrelease(&m.sema);
+	semrelease(&m.sema);
 }
 
diff --git a/src/lib/sync/mutex_test.go b/src/lib/sync/mutex_test.go
index 1c4e73056..b9c063dbc 100644
--- a/src/lib/sync/mutex_test.go
+++ b/src/lib/sync/mutex_test.go
@@ -11,10 +11,10 @@ import (
 	"testing"
 )
 
-func hammerSemaphore(s *int32, cdone chan bool) {
+export func HammerSemaphore(s *int32, cdone chan bool) {
 	for i := 0; i < 1000; i++ {
-		sys.semacquire(s);
-		sys.semrelease(s);
+		semacquire(s);
+		semrelease(s);
 	}
 	cdone <- true;
 }
@@ -24,7 +24,7 @@ export func TestSemaphore(t *testing.T) {
 	*s = 1;
 	c := make(chan bool);
 	for i := 0; i < 10; i++ {
-		go hammerSemaphore(s, c);
+		go HammerSemaphore(s, c);
 	}
 	for i := 0; i < 10; i++ {
 		<-c;
@@ -32,7 +32,7 @@ export func TestSemaphore(t *testing.T) {
 }
 
 
-func hammerMutex(m *Mutex, cdone chan bool) {
+export func HammerMutex(m *Mutex, cdone chan bool) {
 	for i := 0; i < 1000; i++ {
 		m.Lock();
 		m.Unlock();
@@ -44,7 +44,7 @@ export func TestMutex(t *testing.T) {
 	m := new(Mutex);
 	c := make(chan bool);
 	for i := 0; i < 10; i++ {
-		go hammerMutex(m, c);
+		go HammerMutex(m, c);
 	}
 	for i := 0; i < 10; i++ {
 		<-c;
diff --git a/src/lib/testing.go b/src/lib/testing.go
index 2ef05afbc..6199aa6ee 100644
--- a/src/lib/testing.go
+++ b/src/lib/testing.go
@@ -34,7 +34,7 @@ func (t *T) Fail() {
 func (t *T) FailNow() {
 	t.Fail();
 	t.ch <- t;
-	sys.goexit();
+	sys.Goexit();
 }
 
 func (t *T) Log(args ...) {
@@ -104,7 +104,7 @@ export func Main(tests []Test) {
 	}
 	if !ok {
 		println("FAIL");
-		sys.exit(1);
+		sys.Exit(1);
 	}
 	println("PASS");
 }
diff --git a/src/libmach_amd64/darwin.c b/src/libmach_amd64/darwin.c
index 4b3602818..4adf03b1a 100644
--- a/src/libmach_amd64/darwin.c
+++ b/src/libmach_amd64/darwin.c
@@ -635,6 +635,14 @@ catch_exception_raise(mach_port_t eport, mach_port_t thread,
 			goto havet;
 		}
 	}
+	if(nthr > 0)
+		addpid(thr[0].pid, 1);
+	for(i=0; i<nthr; i++){
+		if(thr[i].thread == thread){
+			t = &thr[i];
+			goto havet;
+		}
+	}
 	fprint(2, "did not find thread in catch_exception_raise\n");
 	return KERN_SUCCESS;	// let thread continue
 
diff --git a/src/runtime/Makefile b/src/runtime/Makefile
index 409925328..f62229fd2 100644
--- a/src/runtime/Makefile
+++ b/src/runtime/Makefile
@@ -36,7 +36,6 @@ LIBOFILES=\
 	sema.$O\
 	string.$O\
 	symtab.$O\
-	sys_file.$O\
 
 OFILES=$(RT0OFILES) $(LIBOFILES)
 OS_H=$(GOARCH)_$(GOOS).h
diff --git a/src/runtime/chan.c b/src/runtime/chan.c
index 8296cdc02..f6e245320 100644
--- a/src/runtime/chan.c
+++ b/src/runtime/chan.c
@@ -195,7 +195,7 @@ sendchan(Hchan *c, byte *ep, bool *pres)
 	g->status = Gwaiting;
 	enqueue(&c->sendq, sg);
 	unlock(&chanlock);
-	sys·gosched();
+	sys·Gosched();
 
 	lock(&chanlock);
 	sg = g->param;
@@ -217,7 +217,7 @@ asynch:
 		g->status = Gwaiting;
 		enqueue(&c->sendq, sg);
 		unlock(&chanlock);
-		sys·gosched();
+		sys·Gosched();
 
 		lock(&chanlock);
 	}
@@ -281,7 +281,7 @@ chanrecv(Hchan* c, byte *ep, bool* pres)
 	g->status = Gwaiting;
 	enqueue(&c->recvq, sg);
 	unlock(&chanlock);
-	sys·gosched();
+	sys·Gosched();
 
 	lock(&chanlock);
 	sg = g->param;
@@ -303,7 +303,7 @@ asynch:
 		g->status = Gwaiting;
 		enqueue(&c->recvq, sg);
 		unlock(&chanlock);
-		sys·gosched();
+		sys·Gosched();
 		lock(&chanlock);
 	}
 	c->elemalg->copy(c->elemsize, ep, c->recvdataq->elem);
@@ -690,7 +690,7 @@ sys·selectgo(Select *sel)
 
 	g->status = Gwaiting;
 	unlock(&chanlock);
-	sys·gosched();
+	sys·Gosched();
 
 	lock(&chanlock);
 	sg = g->param;
diff --git a/src/runtime/iface.c b/src/runtime/iface.c
index 6dfba0928..832f15726 100644
--- a/src/runtime/iface.c
+++ b/src/runtime/iface.c
@@ -457,7 +457,7 @@ sys·printinter(Iface i)
 }
 
 void
-sys·reflect(Iface i, uint64 retit, string rettype, bool retindir)
+sys·Reflect(Iface i, uint64 retit, string rettype, bool retindir)
 {
 	int32 wid;
 
@@ -492,14 +492,14 @@ extern int32 ngotypesigs;
 // 		print("first field is string");
 // 	}
 //
-// vv.Interface() returns the result of sys.unreflect with
+// vv.Interface() returns the result of sys.Unreflect with
 // a typestring of "[]int".  If []int is not used with interfaces
 // in the rest of the program, there will be no signature in gotypesigs
 // for "[]int", so we have to invent one.  The only requirements
 // on the fake signature are:
 //
 //	(1) any interface conversion using the signature will fail
-//	(2) calling sys.reflect() returns the args to unreflect
+//	(2) calling sys.Reflect() returns the args to unreflect
 //
 // (1) is ensured by the fact that we allocate a new Sigt,
 // so it will necessarily be != any Sigt in gotypesigs.
@@ -561,7 +561,7 @@ findtype(string type, bool indir)
 
 
 void
-sys·unreflect(uint64 it, string type, bool indir, Iface ret)
+sys·Unreflect(uint64 it, string type, bool indir, Iface ret)
 {
 	Sigt *sigt;
 
diff --git a/src/runtime/proc.c b/src/runtime/proc.c
index 01581569f..943792f49 100644
--- a/src/runtime/proc.c
+++ b/src/runtime/proc.c
@@ -97,7 +97,8 @@ schedinit(void)
 	byte *p;
 
 	mallocinit();
-	
+	goargs();
+
 	// Allocate internal symbol table representation now,
 	// so that we don't need to call malloc when we crash.
 	findfunc(0);
@@ -127,7 +128,7 @@ initdone(void)
 }
 
 void
-sys·goexit(void)
+sys·Goexit(void)
 {
 	if(debug > 1){
 		lock(&debuglock);
@@ -135,7 +136,7 @@ sys·goexit(void)
 		unlock(&debuglock);
 	}
 	g->status = Gmoribund;
-	sys·gosched();
+	sys·Gosched();
 }
 
 G*
@@ -186,7 +187,7 @@ sys·newproc(int32 siz, byte* fn, byte* arg0)
 	mcpy(sp, (byte*)&arg0, siz);
 
 	sp -= 8;
-	*(byte**)sp = (byte*)sys·goexit;
+	*(byte**)sp = (byte*)sys·Goexit;
 
 	sp -= 8;	// retpc used by gogo
 	newg->sched.SP = sp;
@@ -493,7 +494,7 @@ scheduler(void)
 		case Gmoribund:
 			gp->status = Gdead;
 			if(--sched.gcount == 0)
-				sys·exit(0);
+				sys_Exit(0);
 			break;
 		}
 		if(gp->readyonstop){
@@ -522,7 +523,7 @@ scheduler(void)
 // before running g again.  If g->status is Gmoribund,
 // kills off g.
 void
-sys·gosched(void)
+sys·Gosched(void)
 {
 	if(gosave(&g->sched) == 0){
 		g = m->g0;
@@ -585,7 +586,7 @@ sys·exitsyscall(void)
 	// The scheduler will ready g and put this m to sleep.
 	// When the scheduler takes g awa from m,
 	// it will undo the sched.mcpu++ above.
-	sys·gosched();
+	sys·Gosched();
 }
 
 
diff --git a/src/runtime/rt0_amd64.s b/src/runtime/rt0_amd64.s
index 61f9255a5..f1fbcebbf 100644
--- a/src/runtime/rt0_amd64.s
+++ b/src/runtime/rt0_amd64.s
@@ -55,12 +55,12 @@ TEXT mainstart(SB),7,$0
 	CALL	initdone(SB)
 	CALL	main·main(SB)
 	PUSHQ	$0
-	CALL	sys·exit(SB)
+	CALL	sys·Exit(SB)
 	POPQ	AX
 	CALL	notok(SB)
 	RET
 
-TEXT	sys·breakpoint(SB),7,$0
+TEXT	sys·Breakpoint(SB),7,$0
 	BYTE	$0xcc
 	RET
 
diff --git a/src/runtime/rt1_amd64_darwin.c b/src/runtime/rt1_amd64_darwin.c
index 7bd7c78fd..f1ef94664 100644
--- a/src/runtime/rt1_amd64_darwin.c
+++ b/src/runtime/rt1_amd64_darwin.c
@@ -129,7 +129,7 @@ void
 sighandler(int32 sig, struct siginfo *info, void *context)
 {
 	if(panicking)	// traceback already printed
-		sys·exit(2);
+		sys_Exit(2);
 
         _STRUCT_MCONTEXT64 *uc_mcontext = get_uc_mcontext(context);
         _STRUCT_X86_THREAD_STATE64 *ss = get___ss(uc_mcontext);
@@ -151,7 +151,7 @@ sighandler(int32 sig, struct siginfo *info, void *context)
 		print_thread_state(ss);
 	}
 
-	sys·exit(2);
+	sys_Exit(2);
 }
 
 void
diff --git a/src/runtime/rt1_amd64_linux.c b/src/runtime/rt1_amd64_linux.c
index 30a041066..74032e4c1 100644
--- a/src/runtime/rt1_amd64_linux.c
+++ b/src/runtime/rt1_amd64_linux.c
@@ -135,7 +135,7 @@ void
 sighandler(int32 sig, struct siginfo* info, void** context)
 {
 	if(panicking)	// traceback already printed
-		sys·exit(2);
+		sys_Exit(2);
 
 	struct sigcontext *sc = &(((struct ucontext *)context)->uc_mcontext);
 
@@ -156,8 +156,8 @@ sighandler(int32 sig, struct siginfo* info, void** context)
 		print_sigcontext(sc);
 	}
 
-	sys·breakpoint();
-	sys·exit(2);
+	sys·Breakpoint();
+	sys_Exit(2);
 }
 
 struct stack_t {
diff --git a/src/runtime/rt2_amd64.c b/src/runtime/rt2_amd64.c
index 62c74bf51..762eaad58 100644
--- a/src/runtime/rt2_amd64.c
+++ b/src/runtime/rt2_amd64.c
@@ -72,7 +72,7 @@ traceback(byte *pc0, byte *sp, G *g)
 
 // func caller(n int) (pc uint64, file string, line int, ok bool)
 void
-sys·caller(int32 n, uint64 retpc, string retfile, int32 retline, bool retbool)
+sys·Caller(int32 n, uint64 retpc, string retfile, int32 retline, bool retbool)
 {
 	uint64 pc;
 	byte *sp;
diff --git a/src/runtime/rune.c b/src/runtime/rune.c
index 5738ca364..9e731ad21 100644
--- a/src/runtime/rune.c
+++ b/src/runtime/rune.c
@@ -52,120 +52,6 @@ enum
 	Runemax	= 0x10FFFF,	/* maximum rune value */
 };
 
-/*
- * Modified by Wei-Hwa Huang, Google Inc., on 2004-09-24
- * This is a slower but "safe" version of the old chartorune
- * that works on strings that are not necessarily null-terminated.
- *
- * If you know for sure that your string is null-terminated,
- * chartorune will be a bit faster.
- *
- * It is guaranteed not to attempt to access "length"
- * past the incoming pointer.  This is to avoid
- * possible access violations.  If the string appears to be
- * well-formed but incomplete (i.e., to get the whole Rune
- * we'd need to read past str+length) then we'll set the Rune
- * to Bad and return 0.
- *
- * Note that if we have decoding problems for other
- * reasons, we return 1 instead of 0.
- */
-int32
-charntorune(int32 *rune, byte *str, int32 length)
-{
-	int32 c, c1, c2, c3;
-	int32 l;
-
-	/* When we're not allowed to read anything */
-	if(length <= 0) {
-		goto badlen;
-	}
-
-	/*
-	 * one character sequence (7-bit value)
-	 *	00000-0007F => T1
-	 */
-	c = *(byte*)str;  /* cast not necessary, but kept for safety */
-	if(c < Tx) {
-		*rune = c;
-		return 1;
-	}
-
-	// If we can't read more than one character we must stop
-	if(length <= 1) {
-		goto badlen;
-	}
-
-	/*
-	 * two character sequence (11-bit value)
-	 *	0080-07FF => T2 Tx
-	 */
-	c1 = *(byte*)(str+1) ^ Tx;
-	if(c1 & Testx)
-		goto bad;
-	if(c < T3) {
-		if(c < T2)
-			goto bad;
-		l = ((c << Bitx) | c1) & Rune2;
-		if(l <= Rune1)
-			goto bad;
-		*rune = l;
-		return 2;
-	}
-
-	// If we can't read more than two characters we must stop
-	if(length <= 2) {
-		goto badlen;
-	}
-
-	/*
-	 * three character sequence (16-bit value)
-	 *	0800-FFFF => T3 Tx Tx
-	 */
-	c2 = *(byte*)(str+2) ^ Tx;
-	if(c2 & Testx)
-		goto bad;
-	if(c < T4) {
-		l = ((((c << Bitx) | c1) << Bitx) | c2) & Rune3;
-		if(l <= Rune2)
-			goto bad;
-		*rune = l;
-		return 3;
-	}
-
-	if (length <= 3)
-		goto badlen;
-
-	/*
-	 * four character sequence (21-bit value)
-	 *	10000-1FFFFF => T4 Tx Tx Tx
-	 */
-	c3 = *(byte*)(str+3) ^ Tx;
-	if (c3 & Testx)
-		goto bad;
-	if (c < T5) {
-		l = ((((((c << Bitx) | c1) << Bitx) | c2) << Bitx) | c3) & Rune4;
-		if (l <= Rune3)
-			goto bad;
-		*rune = l;
-		return 4;
-	}
-
-	// Support for 5-byte or longer UTF-8 would go here, but
-	// since we don't have that, we'll just fall through to bad.
-
-	/*
-	 * bad decoding
-	 */
-bad:
-	*rune = Bad;
-	return 1;
-badlen:
-	*rune = Bad;
-	return 0;
-
-}
-
 int32
 runetochar(byte *str, int32 rune)  /* note: in original, arg2 was pointer */
 {
@@ -222,22 +108,3 @@ runetochar(byte *str, int32 rune)  /* note: in original, arg2 was pointer */
 	str[3] = Tx | (c & Maskx);
 	return 4;
 }
-
-/*
- * Wrappers for calling from go
- */
-void
-sys·bytestorune(byte *str, int32 off, int32 length, int32 outrune, int32 outcount)
-{
-	outcount = charntorune(&outrune, str + off, length);
-	FLUSH(&outrune);
-	FLUSH(&outcount);
-}
-
-void
-sys·stringtorune(string str, int32 off, int32 outrune, int32 outcount)
-{
-	outcount = charntorune(&outrune, str->str + off, str->len - off);
-	FLUSH(&outrune);
-	FLUSH(&outcount);
-}
diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index 708abd4ca..31bd1ed86 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -32,8 +32,8 @@ sys·panicl(int32 lno)
 		tracebackothers(g);
 	}
 	panicking = 1;
-	sys·breakpoint();  // so we can grab it in a debugger
-	sys·exit(2);
+	sys·Breakpoint();  // so we can grab it in a debugger
+	sys_Exit(2);
 }
 
 void
@@ -55,7 +55,7 @@ throw(int8 *s)
 	prints(s);
 	prints("\n");
 	*(int32*)0 = 0;
-	sys·exit(1);
+	sys_Exit(1);
 }
 
 void
@@ -280,9 +280,9 @@ modf(float64 d, float64 *ip)
 	return d - dd;
 }
 
-// func frexp(float64) (float64, int32); // break fp into exp,frac
+// func Frexp(float64) (float64, int32); // break fp into exp,frac
 void
-sys·frexp(float64 din, float64 dou, int32 iou)
+sys·Frexp(float64 din, float64 dou, int32 iou)
 {
 	dou = frexp(din, &iou);
 	FLUSH(&dou);
@@ -290,7 +290,7 @@ sys·frexp(float64 din, float64 dou, int32 iou)
 
 //func	ldexp(int32, float64) float64;	// make fp from exp,frac
 void
-sys·ldexp(float64 din, int32 ein, float64 dou)
+sys·Ldexp(float64 din, int32 ein, float64 dou)
 {
 	dou = ldexp(din, ein);
 	FLUSH(&dou);
@@ -298,7 +298,7 @@ sys·ldexp(float64 din, int32 ein, float64 dou)
 
 //func	modf(float64) (float64, float64);	// break fp into double+double
 void
-sys·modf(float64 din, float64 integer, float64 fraction)
+sys·Modf(float64 din, float64 integer, float64 fraction)
 {
 	fraction = modf(din, &integer);
 	FLUSH(&fraction);
@@ -306,7 +306,7 @@ sys·modf(float64 din, float64 integer, float64 fraction)
 
 //func	isinf(float64, int32 sign) bool;  // test for infinity
 void
-sys·isInf(float64 din, int32 signin, bool out)
+sys·IsInf(float64 din, int32 signin, bool out)
 {
 	out = isInf(din, signin);
 	FLUSH(&out);
@@ -314,7 +314,7 @@ sys·isInf(float64 din, int32 signin, bool out)
 
 //func	isnan(float64) bool;  // test for NaN
 void
-sys·isNaN(float64 din, bool out)
+sys·IsNaN(float64 din, bool out)
 {
 	out = isNaN(din);
 	FLUSH(&out);
@@ -338,7 +338,7 @@ sys·NaN(float64 out)
 
 // func float32bits(float32) uint32; // raw bits of float32
 void
-sys·float32bits(float32 din, uint32 iou)
+sys·Float32bits(float32 din, uint32 iou)
 {
 	iou = float32tobits(din);
 	FLUSH(&iou);
@@ -346,7 +346,7 @@ sys·float32bits(float32 din, uint32 iou)
 
 // func float64bits(float64) uint64; // raw bits of float64
 void
-sys·float64bits(float64 din, uint64 iou)
+sys·Float64bits(float64 din, uint64 iou)
 {
 	iou = float64tobits(din);
 	FLUSH(&iou);
@@ -354,7 +354,7 @@ sys·float64bits(float64 din, uint64 iou)
 
 // func float32frombits(uint32) float32; // raw bits to float32
 void
-sys·float32frombits(uint32 uin, float32 dou)
+sys·Float32frombits(uint32 uin, float32 dou)
 {
 	dou = float32frombits(uin);
 	FLUSH(&dou);
@@ -362,7 +362,7 @@ sys·float32frombits(uint32 uin, float32 dou)
 
 // func float64frombits(uint64) float64; // raw bits to float64
 void
-sys·float64frombits(uint64 uin, float64 dou)
+sys·Float64frombits(uint64 uin, float64 dou)
 {
 	dou = float64frombits(uin);
 	FLUSH(&dou);
@@ -370,23 +370,37 @@ sys·float64frombits(uint64 uin, float64 dou)
 
 static int32	argc;
 static uint8**	argv;
-static int32	envc;
-static uint8**	envv;
+
+Array sys·Args;
+Array sys·Envs;
 
 void
 args(int32 c, uint8 **v)
 {
 	argc = c;
 	argv = v;
-	envv = v + argc + 1;  // skip 0 at end of argv
-	for (envc = 0; envv[envc] != 0; envc++)
-		;
 }
 
-int32
-getenvc(void)
+void
+goargs(void)
 {
-	return envc;
+	string* goargv;
+	string* envv;
+	int32 i, envc;
+
+	goargv = (string*)argv;
+	for (i=0; i<argc; i++)
+		goargv[i] = gostring(argv[i]);
+	sys·Args.array = (byte*)argv;
+	sys·Args.nel = argc;
+	sys·Args.cap = argc;
+
+	envv = goargv + argc + 1;  // skip 0 at end of argv
+	for (envc = 0; envv[envc] != 0; envc++)
+		envv[envc] = gostring((uint8*)envv[envc]);
+	sys·Envs.array = (byte*)envv;
+	sys·Envs.nel = envc;
+	sys·Envs.cap = envc;
 }
 
 byte*
@@ -394,11 +408,15 @@ getenv(int8 *s)
 {
 	int32 i, j, len;
 	byte *v, *bs;
+	string* envv;
+	int32 envc;
 
 	bs = (byte*)s;
 	len = findnull(bs);
+	envv = (string*)sys·Envs.array;
+	envc = sys·Envs.nel;
 	for(i=0; i<envc; i++){
-		v = envv[i];
+		v = envv[i]->str;
 		for(j=0; j<len; j++)
 			if(bs[j] != v[j])
 				goto nomatch;
@@ -410,6 +428,7 @@ getenv(int8 *s)
 	return nil;
 }
 
+
 int32
 atoi(byte *p)
 {
@@ -421,44 +440,6 @@ atoi(byte *p)
 	return n;
 }
 
-//func argc() int32;  // return number of arguments
-void
-sys·argc(int32 v)
-{
-	v = argc;
-	FLUSH(&v);
-}
-
-//func envc() int32;  // return number of environment variables
-void
-sys·envc(int32 v)
-{
-	v = envc;
-	FLUSH(&v);
-}
-
-//func argv(i) string;  // return argument i
-void
-sys·argv(int32 i, string s)
-{
-	if(i >= 0 && i < argc)
-		s = gostring(argv[i]);
-	else
-		s = emptystring;
-	FLUSH(&s);
-}
-
-//func envv(i) string;  // return environment variable i
-void
-sys·envv(int32 i, string s)
-{
-	if(i >= 0 && i < envc)
-		s = gostring(envv[i]);
-	else
-		s = emptystring;
-	FLUSH(&s);
-}
-
 void
 check(void)
 {
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index becf49822..735f1aa9c 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -252,7 +252,6 @@ int32	strcmp(byte*, byte*);
 int32	findnull(byte*);
 void	dump(byte*, int32);
 int32	runetochar(byte*, int32);
-int32	chartorune(uint32*, byte*);
 
 /*
  * very low level c-called
@@ -261,6 +260,7 @@ int32	gogo(Gobuf*);
 int32	gosave(Gobuf*);
 int32	gogoret(Gobuf*, uint64);
 void	retfromnewstack(void);
+void	goargs(void);
 void	setspgoto(byte*, void(*)(void), void(*)(void));
 void	FLUSH(void*);
 void*	getu(void);
@@ -348,16 +348,15 @@ void	notewakeup(Note*);
  * UTF-8 characters in identifiers.
  */
 #ifndef __GNUC__
-#define sys_exit sys·exit
-#define sys_gosched sys·gosched
+#define sys_Exit sys·Exit
+#define sys_Gosched sys·Gosched
 #define sys_memclr sys·memclr
 #define sys_write sys·write
-#define sys_breakpoint sys·breakpoint
-#define sys_bytestorune sys·bytestorune
+#define sys_Breakpoint sys·Breakpoint
 #define sys_catstring sys·catstring
 #define sys_cmpstring sys·cmpstring
 #define sys_getcallerpc sys·getcallerpc
-#define sys_goexit sys·goexit
+#define sys_Goexit sys·Goexit
 #define sys_indexstring sys·indexstring
 #define sys_intstring sys·intstring
 #define sys_mal sys·mal
@@ -376,17 +375,16 @@ void	notewakeup(Note*);
 #define sys_semrelease sys·semrelease
 #define sys_setcallerpc sys·setcallerpc
 #define sys_slicestring sys·slicestring
-#define sys_stringtorune sys·stringtorune
 #endif
 
 /*
  * low level go -called
  */
-void	sys_goexit(void);
-void	sys_gosched(void);
-void	sys_exit(int32);
+void	sys_Goexit(void);
+void	sys_Gosched(void);
+void	sys_Exit(int32);
 void	sys_write(int32, void*, int32);
-void	sys_breakpoint(void);
+void	sys_Breakpoint(void);
 uint8*	sys_mmap(byte*, uint32, int32, int32, int32, uint32);
 void	sys_memclr(byte*, uint32);
 void	sys_setcallerpc(void*, void*);
@@ -416,7 +414,5 @@ bool	isNaN(float64);
  * User go-called
  */
 void	sys_readfile(string, string, bool);
-void	sys_bytestorune(byte*, int32, int32, int32, int32);
-void	sys_stringtorune(string, int32, int32, int32);
 void	sys_semacquire(uint32*);
 void	sys_semrelease(uint32*);
diff --git a/src/runtime/sema.c b/src/runtime/sema.c
index 117b0797a..e4309f079 100644
--- a/src/runtime/sema.c
+++ b/src/runtime/sema.c
@@ -119,7 +119,7 @@ semsleep2(Sema *s)
 {
 	USED(s);
 	g->status = Gwaiting;
-	sys·gosched();
+	sys·Gosched();
 }
 
 static int32
@@ -133,11 +133,11 @@ cansemacquire(uint32 *addr)
 	return 0;
 }
 
-// func sys.semacquire(addr *uint32)
+// func sync.semacquire(addr *uint32)
 // For now has no return value.
 // Might return an ok (not interrupted) bool in the future?
 void
-sys·semacquire(uint32 *addr)
+sync·semacquire(uint32 *addr)
 {
 	Sema s;
 
@@ -163,9 +163,9 @@ sys·semacquire(uint32 *addr)
 	semwakeup(addr);
 }
 
-// func sys.semrelease(addr *uint32)
+// func sync.semrelease(addr *uint32)
 void
-sys·semrelease(uint32 *addr)
+sync·semrelease(uint32 *addr)
 {
 	uint32 v;
 
diff --git a/src/runtime/sys_amd64_darwin.s b/src/runtime/sys_amd64_darwin.s
index 92af21c93..e16983346 100644
--- a/src/runtime/sys_amd64_darwin.s
+++ b/src/runtime/sys_amd64_darwin.s
@@ -9,7 +9,7 @@
 //
 
 // Exit the entire program (like C exit)
-TEXT	sys·exit(SB),7,$-8
+TEXT	sys·Exit(SB),7,$-8
 	MOVL	8(SP), DI		// arg 1 exit status
 	MOVL	$(0x2000000+1), AX	// syscall entry
 	SYSCALL
diff --git a/src/runtime/sys_amd64_linux.s b/src/runtime/sys_amd64_linux.s
index d385bb43e..49349bb48 100644
--- a/src/runtime/sys_amd64_linux.s
+++ b/src/runtime/sys_amd64_linux.s
@@ -6,7 +6,7 @@
 // System calls and other sys.stuff for AMD64, Linux
 //
 
-TEXT	sys·exit(SB),7,$0-8
+TEXT	sys·Exit(SB),7,$0-8
 	MOVL	8(SP), DI
 	MOVL	$231, AX	// exitgroup - force all os threads to exi
 	SYSCALL
@@ -175,12 +175,12 @@ TEXT clone(SB),7,$0
 	MOVQ	SI, SP
 	MOVQ	R8, R14	// m
 	MOVQ	R9, R15	// g
-	
+
 	// Initialize m->procid to Linux tid
 	MOVL	$186, AX	// gettid
 	SYSCALL
 	MOVQ	AX, 24(R14)
-	
+
 	// Call fn
 	CALL	R12
 
diff --git a/src/runtime/sys_file.c b/src/runtime/sys_file.c
deleted file mode 100644
index 1fc1e55e6..000000000
--- a/src/runtime/sys_file.c
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2009 The Go Authors.  All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-#include "runtime.h"
-#include "sys_types.h"
-
-void
-sys·readfile(string filein, string fileout, bool okout)
-{
-	int32 fd;
-	byte namebuf[256];
-	struct stat statbuf;
-
-	fileout = nil;
-	okout = false;
-
-	if(filein == nil || filein->len >= sizeof(namebuf))
-		goto out;
-
-	mcpy(namebuf, filein->str, filein->len);
-	namebuf[filein->len] = '\0';
-	fd = open(namebuf, 0);
-	if(fd < 0)
-		goto out;
-
-	if (fstat(fd, &statbuf) < 0)
-		goto close_out;
-
-	if (statbuf.st_size <= 0)
-		goto close_out;
-
-	fileout = mal(sizeof(fileout->len)+statbuf.st_size + 1);
-	fileout->len = statbuf.st_size;
-
-	if (read(fd, fileout->str, statbuf.st_size) != statbuf.st_size) {
-		fileout = nil;
-		goto close_out;
-	}
-	okout = true;
-
-close_out:
-	close(fd);
-out:
-	FLUSH(&fileout);
-	FLUSH(&okout);
-}
-
-void
-sys·writefile(string filein, string textin, bool okout)
-{
-	int32 fd;
-	byte namebuf[256];
-
-	okout = false;
-
-	if(filein == nil || filein->len >= sizeof(namebuf))
-		goto out;
-
-	mcpy(namebuf, filein->str, filein->len);
-	namebuf[filein->len] = '\0';
-	fd = open(namebuf, 1|O_CREAT, 0644);  // open for write, create if non-existant (sic)
-	if(fd < 0)
-		goto out;
-
-	if (write(fd, textin->str, textin->len) != textin->len) {
-		goto close_out;
-	}
-	okout = true;
-
-close_out:
-	close(fd);
-out:
-	FLUSH(&okout);
-}
diff --git a/test/235.go b/test/235.go
index 9db10175d..e24106dd0 100644
--- a/test/235.go
+++ b/test/235.go
@@ -65,5 +65,5 @@ func main() {
 		x = min(xs);
 		if x != OUT[i] { panic("bad: ", x, " should be ", OUT[i]); }
 	}
-	sys.exit(0);
+	sys.Exit(0);
 }
diff --git a/test/args.go b/test/args.go
index 0e9b9a315..4b9671a53 100644
--- a/test/args.go
+++ b/test/args.go
@@ -7,13 +7,13 @@
 package main
 
 func main() {
-	if sys.argc() != 3 {
+	if len(sys.Args) != 3 {
 		panic("argc")
 	}
-	if sys.argv(1) != "arg1" {
+	if sys.Args[1] != "arg1" {
 		panic("arg1")
 	}
-	if sys.argv(2) != "arg2" {
+	if sys.Args[2] != "arg2" {
 		panic("arg2")
 	}
 }
diff --git a/test/bugs/bug130.go b/test/bugs/bug130.go
index 7122863bb..aa3f0dd70 100644
--- a/test/bugs/bug130.go
+++ b/test/bugs/bug130.go
@@ -16,5 +16,5 @@ func main() {
   var i I = &s;
   c := make(chan int);
   go i.send(c);
-  sys.exit(<-c);
+  sys.Exit(<-c);
 }
diff --git a/test/chan/fifo.go b/test/chan/fifo.go
index e19059547..ad53ab655 100644
--- a/test/chan/fifo.go
+++ b/test/chan/fifo.go
@@ -18,7 +18,7 @@ func AsynchFifo() {
 	for i := 0; i < N; i++ {
 		if <-ch != i {
 			print("bad receive\n");
-			sys.exit(1);
+			sys.Exit(1);
 		}
 	}
 }
diff --git a/test/chan/goroutines.go b/test/chan/goroutines.go
index 104b247f3..8c7f9ad69 100644
--- a/test/chan/goroutines.go
+++ b/test/chan/goroutines.go
@@ -20,12 +20,12 @@ func f(left, right chan int) {
 
 func main() {
 	var n = 10000;
-	if sys.argc() > 1 {
+	if len(sys.Args) > 1 {
 		var err *os.Error;
-		n, err = strconv.Atoi(sys.argv(1));
+		n, err = strconv.Atoi(sys.Args[1]);
 		if err != nil {
 			print("bad arg\n");
-			sys.exit(1);
+			sys.Exit(1);
 		}
 	}
 	leftmost := make(chan int);
diff --git a/test/chan/nonblock.go b/test/chan/nonblock.go
index 1c3128d5b..36582b965 100644
--- a/test/chan/nonblock.go
+++ b/test/chan/nonblock.go
@@ -10,7 +10,7 @@
 package main
 
 func pause() {
-	for i:=0; i<100; i++ { sys.gosched() }
+	for i:=0; i<100; i++ { sys.Gosched() }
 }
 
 func i32receiver(c chan int32) {
diff --git a/test/chan/powser1.go b/test/chan/powser1.go
index 6e6489134..3b6389169 100644
--- a/test/chan/powser1.go
+++ b/test/chan/powser1.go
@@ -630,7 +630,7 @@ func checka(U PS, a []*rat, str string) {
 
 func main() {
 	Init();
-	if sys.argc() > 1 {  // print
+	if len(sys.Args) > 1 {  // print
 		print("Ones: "); Printn(Ones, 10);
 		print("Twos: "); Printn(Twos, 10);
 		print("Add: "); Printn(Add(Ones, Twos), 10);
@@ -708,5 +708,5 @@ func main() {
 		checka(t, a, "Tan");  // 0 1 0 1/3 0 2/15
 */
 	}
-	sys.exit(0);  // BUG: force waiting goroutines to exit
+	sys.Exit(0);  // BUG: force waiting goroutines to exit
 }
diff --git a/test/chan/powser2.go b/test/chan/powser2.go
index 14364e602..094bd2bfe 100644
--- a/test/chan/powser2.go
+++ b/test/chan/powser2.go
@@ -635,7 +635,7 @@ func checka(U PS, a []*rat, str string) {
 
 func main() {
 	Init();
-	if sys.argc() > 1 {  // print
+	if len(sys.Args) > 1 {  // print
 		print("Ones: "); Printn(Ones, 10);
 		print("Twos: "); Printn(Twos, 10);
 		print("Add: "); Printn(Add(Ones, Twos), 10);
@@ -713,5 +713,5 @@ func main() {
 		checka(t, a, "Tan");  // 0 1 0 1/3 0 2/15
 */
 	}
-	sys.exit(0);  // BUG: force waiting goroutines to exit
+	sys.Exit(0);  // BUG: force waiting goroutines to exit
 }
diff --git a/test/chan/sieve.go b/test/chan/sieve.go
index 0923ab5d6..0cebdc641 100644
--- a/test/chan/sieve.go
+++ b/test/chan/sieve.go
@@ -47,5 +47,5 @@ func main() {
 	for i := 0; i < len(a); i++ {
 		if <-primes != a[i] { panic(a[i])}
 	}
-	sys.exit(0);
+	sys.Exit(0);
 }
diff --git a/test/char_lit.go b/test/char_lit.go
index de967883b..d45ecf398 100644
--- a/test/char_lit.go
+++ b/test/char_lit.go
@@ -33,10 +33,10 @@ func main() {
   ;
   if '\Ucafebabe' != 0xcafebabe {
   	print("cafebabe wrong\n");
-  	sys.exit(1)
+  	sys.Exit(1)
   }
   if i != 0xcc238de1 {
   	print("number is ", i, " should be ", 0xcc238de1, "\n");
-  	sys.exit(1)
+  	sys.Exit(1)
   }
 }
diff --git a/test/env.go b/test/env.go
index 8b995f5b7..41f230d1a 100644
--- a/test/env.go
+++ b/test/env.go
@@ -12,15 +12,15 @@ func main() {
 	ga, e0 := os.Getenv("GOARCH");
 	if e0 != nil {
 		print("$GOARCH: ", e0.String(), "\n");
-		sys.exit(1);
+		sys.Exit(1);
 	}
 	if ga != "amd64" {
 		print("$GOARCH=", ga, "\n");
-		sys.exit(1);
+		sys.Exit(1);
 	}
 	xxx, e1 := os.Getenv("DOES_NOT_EXIST");
 	if e1 != os.ENOENV {
 		print("$DOES_NOT_EXIST=", xxx, "; err = ", e1.String(), "\n");
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
diff --git a/test/fixedbugs/bug006.go b/test/fixedbugs/bug006.go
index 938a216e2..2fbde9c9a 100644
--- a/test/fixedbugs/bug006.go
+++ b/test/fixedbugs/bug006.go
@@ -13,5 +13,5 @@ const (
 
 func main() {
 	if g == 0.0 { print("zero\n");}
-	if g != 4.5 { print(" fail\n"); sys.exit(1); }
+	if g != 4.5 { print(" fail\n"); sys.Exit(1); }
 }
diff --git a/test/fixedbugs/bug059.go b/test/fixedbugs/bug059.go
index 501616b3d..21c078361 100644
--- a/test/fixedbugs/bug059.go
+++ b/test/fixedbugs/bug059.go
@@ -29,6 +29,6 @@ func main() {
 	a[0] = "x";
 	m["0"][0] = "deleted";
 	if m["0"][0] != "deleted" {
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
diff --git a/test/fixedbugs/bug060.go b/test/fixedbugs/bug060.go
index 124e401ff..5d5fc4a7b 100644
--- a/test/fixedbugs/bug060.go
+++ b/test/fixedbugs/bug060.go
@@ -12,6 +12,6 @@ func main() {
 	m[0]++;
 	if m[0] != 1 {
 		print("map does not increment\n");
-		sys.exit(1)
+		sys.Exit(1)
 	}
 }
diff --git a/test/fixedbugs/bug097.go b/test/fixedbugs/bug097.go
index fe5fd4b87..70bd6e2b4 100644
--- a/test/fixedbugs/bug097.go
+++ b/test/fixedbugs/bug097.go
@@ -30,8 +30,8 @@ Faulting address: 0x4558
 pc: 0x4558
 
 0x4558?zi
-	sys·breakpoint(40960, 0, 45128, ...)
-	sys·breakpoint(0xa000, 0xb048, 0xa000, ...)
+	sys·Breakpoint(40960, 0, 45128, ...)
+	sys·Breakpoint(0xa000, 0xb048, 0xa000, ...)
 0x156a?zi
 	sys·panicl(342, 0, 0, ...)
 	sys·panicl(0x156, 0x300000000, 0xb024, ...)
diff --git a/test/fixedbugs/bug120.go b/test/fixedbugs/bug120.go
index 28c435925..10e28034d 100644
--- a/test/fixedbugs/bug120.go
+++ b/test/fixedbugs/bug120.go
@@ -53,6 +53,6 @@ func main() {
 		}
 	}
 	if !ok {
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
diff --git a/test/if1.go b/test/if1.go
index 81b041475..1784d8239 100644
--- a/test/if1.go
+++ b/test/if1.go
@@ -9,10 +9,10 @@ package main
 func main() {
 	count := 7;
 	if one := 1; {
-		count = count + one	
+		count = count + one
 	}
 	if count != 8 {
 		print(count, " should be 8\n");
-		sys.exit(1)
+		sys.Exit(1)
 	}
 }
diff --git a/test/int_lit.go b/test/int_lit.go
index f7311dd25..4121070f3 100644
--- a/test/int_lit.go
+++ b/test/int_lit.go
@@ -7,7 +7,7 @@
 package main
 
 func main() {
-  s := 
+  s :=
     0 +
     123 +
     0123 +
@@ -18,6 +18,6 @@ func main() {
     0X123;
   if s != 788 {
     print("s is ", s, "; should be 788\n");
-    sys.exit(1);
+    sys.Exit(1);
   }
 }
diff --git a/test/interface4.go b/test/interface4.go
index 0d7223500..a55936df8 100644
--- a/test/interface4.go
+++ b/test/interface4.go
@@ -70,6 +70,6 @@ func main() {
 	nonptrs();
 
 	if bad {
-		sys.exit(1)
+		sys.Exit(1)
 	}
 }
diff --git a/test/interface6.go b/test/interface6.go
index b4a14fb94..6053e51d6 100644
--- a/test/interface6.go
+++ b/test/interface6.go
@@ -145,6 +145,6 @@ func main() {
   f11();
   f12();
   if fail > 0 {
-    sys.exit(1)
+    sys.Exit(1)
   }
 }
diff --git a/test/ken/chan.go b/test/ken/chan.go
index ba1337587..a272c2bbc 100644
--- a/test/ken/chan.go
+++ b/test/ken/chan.go
@@ -88,7 +88,7 @@ send(c *Chan)
 	nproc++;	// total goroutines running
 	for {
 		for r:=nrand(10); r>=0; r-- {
-			sys.gosched();
+			sys.Gosched();
 		}
 		c.sc <- c.sv;
 		if c.send() {
@@ -119,7 +119,7 @@ recv(c *Chan)
 	nproc++;	// total goroutines running
 	for {
 		for r:=nrand(10); r>=0; r-- {
-			sys.gosched();
+			sys.Gosched();
 		}
 		v = <-c.rc;
 		if c.recv(v) {
@@ -148,7 +148,7 @@ sel(r0,r1,r2,r3, s0,s1,s2,s3 *Chan)
 
 	for {
 		for r:=nrand(5); r>=0; r-- {
-			sys.gosched();
+			sys.Gosched();
 		}
 
 		select {
@@ -270,9 +270,9 @@ test6(c int)
 func
 wait()
 {
-	sys.gosched();
+	sys.Gosched();
 	for nproc != 0 {
-		sys.gosched();
+		sys.Gosched();
 	}
 }
 
@@ -321,7 +321,7 @@ main()
 
 	if tots != t || totr != t {
 		print("tots=", tots, " totr=", totr, " sb=", t, "\n");
-		sys.exit(1);
+		sys.Exit(1);
 	}
-	sys.exit(0);
+	sys.Exit(0);
 }
diff --git a/test/readfile.go b/test/readfile.go
index db8ca99e4..4853fd20e 100644
--- a/test/readfile.go
+++ b/test/readfile.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// $G $F.go && $L $F.$A && ./$A.out readfile.go
+// # $G $F.go && $L $F.$A && ./$A.out readfile.go
 // # This is some data we can recognize
 
 package main
@@ -14,7 +14,7 @@ func main() {
 	s, ok = sys.readfile("readfile.go");
 	if !ok {
 		print("couldn't readfile\n");
-		sys.exit(1)
+		sys.Exit(1)
 	}
 	start_of_file :=
 		"// $G $F.go && $L $F.$A && ./$A.out readfile.go\n" +
@@ -23,6 +23,6 @@ func main() {
 		"package main\n";
 	if s[0:102] != start_of_file {
 		print("wrong data\n");
-		sys.exit(1)
+		sys.Exit(1)
 	}
 }
diff --git a/test/string_lit.go b/test/string_lit.go
index 219621484..5842eaa29 100644
--- a/test/string_lit.go
+++ b/test/string_lit.go
@@ -43,7 +43,7 @@ func main() {
 		"本"
 		"\a\b\f\n\r\t\v\\\""
 		"\000\123\x00\xca\xFE\u0123\ubabe\U0000babe"
-		
+
 		``
 		` `
 		`'"`
@@ -84,5 +84,5 @@ func main() {
 	r = 0x10ffff + 1;
 	s = string(r);
 	assert(s, "\xef\xbf\xbd", "too-large rune");
-	sys.exit(ecode);
+	sys.Exit(ecode);
 }
diff --git a/test/switch1.go b/test/switch1.go
index 003e473ef..fac9ac8ec 100644
--- a/test/switch1.go
+++ b/test/switch1.go
@@ -10,9 +10,9 @@ func main() {
 	i := 0;
 	switch x := 5; {
 		case i < x:
-			sys.exit(0);
+			sys.Exit(0);
 		case i == x:
 		case i > x:
-			sys.exit(1);
+			sys.Exit(1);
 	}
 }
diff --git a/test/utf.go b/test/utf.go
index 5905152b6..a93cb69db 100644
--- a/test/utf.go
+++ b/test/utf.go
@@ -6,6 +6,8 @@
 
 package main
 
+import "utf8"
+
 func main() {
 	var chars [6] int;
 	chars[0] = 'a';
@@ -21,7 +23,7 @@ func main() {
 	var l = len(s);
 	for w, i, j := 0,0,0; i < l; i += w {
 		var r int;
-		r, w = sys.stringtorune(s, i);
+		r, w = utf8.DecodeRuneInString(s, i);
 		if w == 0 { panic("zero width in string") }
 		if r != chars[j] { panic("wrong value from string") }
 		j++;
@@ -29,7 +31,7 @@ func main() {
 	// encoded as bytes:  'a' 'b' 'c' e6 97 a5 e6 9c ac e8 aa 9e
 	const L = 12;
 	if L != l { panic("wrong length constructing array") }
-	a := new([L]byte);
+	a := make([]byte, L);
 	a[0] = 'a';
 	a[1] = 'b';
 	a[2] = 'c';
@@ -44,7 +46,7 @@ func main() {
 	a[11] = 0x9e;
 	for w, i, j := 0,0,0; i < L; i += w {
 		var r int;
-		r, w = sys.bytestorune(&a[0], i, L);
+		r, w = utf8.DecodeRune(a[i:L]);
 		if w == 0 { panic("zero width in bytes") }
 		if r != chars[j] { panic("wrong value from bytes") }
 		j++;
diff --git a/usr/gri/gosrc/compilation.go b/usr/gri/gosrc/compilation.go
index 76298f7f1..a186966f2 100644
--- a/usr/gri/gosrc/compilation.go
+++ b/usr/gri/gosrc/compilation.go
@@ -23,7 +23,7 @@ import Verifier "verifier"
 func LineCol(src string, pos int) (line, col int) {
 	line = 1;
 	lpos := 0;
-	
+
 	if pos > len(src) {
 		pos = len(src);
 	}
@@ -34,7 +34,7 @@ func LineCol(src string, pos int) (line, col int) {
 			lpos = i;
 		}
 	}
-	
+
 	return line, pos - lpos;
 }
 
@@ -60,9 +60,9 @@ export func Error(comp *Globals.Compilation, pos int, msg string) {
 		comp.nerrors++;
 		comp.errpos = pos;
 	}
-	
+
 	if comp.nerrors >= 10 {
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
 
@@ -135,7 +135,7 @@ export func Compile(comp *Globals.Compilation, src_file string) {
 	// calling this function recursively w/o setting up a new comp - this
 	// is broken and leads to an assertion error (more then one package
 	// upon parsing of the package header).
-	
+
 	src, ok := Platform.ReadSourceFile(src_file);
 	if !ok {
 		print("cannot open ", src_file, "\n");
@@ -144,7 +144,7 @@ export func Compile(comp *Globals.Compilation, src_file string) {
 
 	comp.src_file = src_file;
 	comp.src = src;
-	
+
 	if comp.flags.verbosity > 0 {
 		print(src_file, "\n");
 	}
diff --git a/usr/gri/gosrc/go.go b/usr/gri/gosrc/go.go
index f1e67bcc6..b56dc8bcc 100644
--- a/usr/gri/gosrc/go.go
+++ b/usr/gri/gosrc/go.go
@@ -28,8 +28,8 @@ func PrintHelp() {
 var argno int = 1;
 func Next() string {
 	arg := "";
-	if argno < sys.argc() {
-		arg = sys.argv(argno);
+	if argno < len(sys.Args) {
+		arg = sys.Args[argno];
 		argno++;
 	}
 	return arg;
diff --git a/usr/gri/gosrc/scanner.go b/usr/gri/gosrc/scanner.go
index ac5b9b61b..ac3c3fd40 100644
--- a/usr/gri/gosrc/scanner.go
+++ b/usr/gri/gosrc/scanner.go
@@ -401,7 +401,7 @@ func (S *Scanner) Error(pos int, msg string) {
 	}
 
 	if S.nerrors >= 10 {
-		sys.exit(1);
+		sys.Exit(1);
 	}
 }
 
@@ -601,7 +601,7 @@ func (S *Scanner) ScanEscape(quote int) string {
 		}
 		S.Error(pos, "illegal char escape");
 	}
-	
+
 	return "";  // TODO fix this
 }
 
diff --git a/usr/gri/gosrc/test_scanner.go b/usr/gri/gosrc/test_scanner.go
index 928a8075d..8fa821247 100644
--- a/usr/gri/gosrc/test_scanner.go
+++ b/usr/gri/gosrc/test_scanner.go
@@ -46,18 +46,18 @@ func Scan2(filename, src string) {
 
 
 func main() {
-	for i := 1; i < sys.argc(); i++ {
+	for i := 1; i < len(sys.Args); i++ {
 		var src string;
 		var ok bool;
-		src, ok = sys.readfile(sys.argv(i));
+		src, ok = sys.readfile(sys.Args[i]);
 		if ok {
-			print("scanning (standard) " + sys.argv(i) + "\n");
-			Scan1(sys.argv(i), src);
+			print("scanning (standard) " + sys.Args[i] + "\n");
+			Scan1(sys.Args[i], src);
 			print("\n");
-			print("scanning (channels) " + sys.argv(i) + "\n");
-			Scan2(sys.argv(i), src);
+			print("scanning (channels) " + sys.Args[i] + "\n");
+			Scan2(sys.Args[i], src);
 		} else {
-			print("error: cannot read " + sys.argv(i) + "\n");
+			print("error: cannot read " + sys.Args[i] + "\n");
 		}
 		print("\n");
 	}
diff --git a/usr/gri/pretty/compilation.go b/usr/gri/pretty/compilation.go
index 6e78e8f7e..ad802566f 100644
--- a/usr/gri/pretty/compilation.go
+++ b/usr/gri/pretty/compilation.go
@@ -92,7 +92,7 @@ func (h *errorHandler) ErrorMsg(pos int, msg string) {
 
 	if h.nerrors >= 10 {
 		// TODO enable when done with name convention
-		//sys.exit(1);
+		//sys.Exit(1);
 	}
 }
 
diff --git a/usr/gri/pretty/platform.go b/usr/gri/pretty/platform.go
index c605b07a5..85fb8eadd 100644
--- a/usr/gri/pretty/platform.go
+++ b/usr/gri/pretty/platform.go
@@ -4,6 +4,8 @@
 
 package Platform
 
+import IO "io"
+import OS "os"
 import Utils "utils"
 
 
@@ -16,24 +18,13 @@ export var
 	GOROOT,
 	USER string;
 
-
-func getEnv(key string) string {
-	n := len(key);
-	for i := 0; i < sys.envc(); i++ {
-		v := sys.envv(i);
-		if n < len(v) && v[0 : n] == key && v[n] == '=' {
-			return v[n + 1 : len(v)];  // +1: trim "="
-		}
-	}
-	return "";
-}
-
-
 func init() {
-	GOARCH = getEnv("GOARCH");
-	GOOS = getEnv("GOOS");
-	GOROOT = getEnv("GOROOT");
-	USER = getEnv("USER");
+	var e *OS.Error;
+
+	GOARCH, e = OS.Getenv("GOARCH");
+	GOOS, e = OS.Getenv("GOOS");
+	GOROOT, e = OS.Getenv("GOROOT");
+	USER, e = OS.Getenv("USER");
 }
 
 
@@ -46,25 +37,48 @@ export const (
 	Obj_file_ext = ".7";
 )
 
+func readfile(filename string) (string, *OS.Error) {
+	fd, err := OS.Open(filename, OS.O_RDONLY, 0);
+	if err != nil {
+		return "", err;
+	}
+	var buf [1<<20]byte;
+	n, err1 := IO.Readn(fd, buf);
+	fd.Close();
+	if err1 == IO.ErrEOF {
+		err1 = nil;
+	}
+	return string(buf[0:n]), err1;
+}
+
+func writefile(name, data string) *OS.Error {
+	fd, err := OS.Open(name, OS.O_WRONLY, 0);
+	if err != nil {
+		return err;
+	}
+	n, err1 := IO.WriteString(fd, data);
+	fd.Close();
+	return err1;
+}
 
-export func ReadObjectFile(filename string) (data string, ok bool) {
-	data, ok = sys.readfile(filename + Obj_file_ext);
+export func ReadObjectFile(filename string) (string, bool) {
+	data, err := readfile(filename + Obj_file_ext);
 	magic := MAGIC_obj_file;  // TODO remove once len(constant) works
-	if ok && len(data) >= len(magic) && data[0 : len(magic)] == magic {
-		return data, ok;
+	if err == nil && len(data) >= len(magic) && data[0 : len(magic)] == magic {
+		return data, true;
 	}
 	return "", false;
 }
 
 
-export func ReadSourceFile(name string) (data string, ok bool) {
+export func ReadSourceFile(name string) (string, bool) {
 	name = Utils.TrimExt(name, Src_file_ext) + Src_file_ext;
-	data, ok = sys.readfile(name);
-	return data, ok;
+	data, err := readfile(name);
+	return data, err == nil;
 }
 
 
 export func WriteObjectFile(name string, data string) bool {
 	name = Utils.TrimExt(Utils.BaseName(name), Src_file_ext) + Obj_file_ext;
-	return sys.writefile(name, data);
+	return writefile(name, data) != nil;
 }
diff --git a/usr/gri/pretty/pretty.go b/usr/gri/pretty/pretty.go
index 366b176cd..1d6ad575f 100644
--- a/usr/gri/pretty/pretty.go
+++ b/usr/gri/pretty/pretty.go
@@ -32,13 +32,13 @@ func init() {
 func usage() {
 	print("usage: pretty { flags } { files }\n");
 	Flag.PrintDefaults();
-	sys.exit(0);
+	sys.Exit(0);
 }
 
 
 func main() {
 	Flag.Parse();
-	
+
 	if Flag.NFlag() == 0 && Flag.NArg() == 0 {
 		usage();
 	}
@@ -49,7 +49,7 @@ func main() {
 
 		if false /* DISABLED flags.deps */ {
 			Compilation.ComputeDeps(src_file, &flags);
-			
+
 		} else {
 			prog, nerrors := Compilation.Compile(src_file, &flags);
 			if nerrors > 0 {
diff --git a/usr/gri/pretty/untab.go b/usr/gri/pretty/untab.go
index dea25c51f..00f1306e6 100644
--- a/usr/gri/pretty/untab.go
+++ b/usr/gri/pretty/untab.go
@@ -21,7 +21,7 @@ var (
 
 func error(format string, params ...) {
 	fmt.Printf(format, params);
-	sys.exit(1);
+	sys.Exit(1);
 }