runtime: finish pchw -> tiny, added gettime for tiny

R=rsc
CC=golang-dev
https://golang.org/cl/1514041

src/cmd/8l/obj.c

@@ -171,7 +171,7 @@ main(int argc, char *argv[])
 		if(strcmp(goos, "windows") == 0)
 			HEADTYPE = 10;
 		else
-		if(strcmp(goos, "pchw") == 0)
+		if(strcmp(goos, "tiny") == 0)
 			HEADTYPE = 11;
 		else
 			print("goos is not known: %s\n", goos);

src/pkg/runtime/Makefile

@@ -26,8 +26,8 @@ GOFILES=\
 	type.go\
 	version.go\
 
-GOFILES_pchw=\
-	pchw/io.go\
+GOFILES_tiny=\
+	tiny/io.go\
 
 OFILES_windows=\
 	syscall.$O\

src/pkg/runtime/tiny/386/rt0.s

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-TEXT _rt0_386_pchw(SB), 7, $0
+TEXT _rt0_386_tiny(SB), 7, $0
 	// Disable interrupts.
 	CLI
 	

src/pkg/runtime/tiny/386/signal.c

-// just the write function
+// Copyright 2010 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"
 
 extern void ·write(int32 fd, void *v, int32 len, int32 cap);	// slice, spelled out
 
@@ -8,3 +12,8 @@ write(int32 fd, void *v, int32 len)
 	·write(fd, v, len, len);
 	return len;
 }
+
+void
+gettime(int64*, int32*) 
+{
+}

src/pkg/runtime/tiny/README

@@ -24,6 +24,9 @@ and GOOS set to your normal GOOS (linux, darwin).  Then:
 	cat bootblock 8.out | dd of=disk conv=notrunc
 	bochs
 
+Use the built-in print(text string) function to print to the
+console.
+
 You may have to tweak the .bochsrc depending on your system,
 and you may need to install the Bochs emulator.