avoid duplicate field names, so that bug132 can be fixed

also fix echo bug that just surfaced in mkerrors.sh

R=r
DELTA=67  (11 added, 19 deleted, 37 changed)
OCL=33743
CL=33757

src/cmd/godefs/main.c

@@ -149,6 +149,7 @@ main(int argc, char **argv)
 {
 	int p[2], pid, i, j, n, off, npad, prefix;
 	char **av, *q, *r, *tofree, *name;
+	char nambuf[100];
 	Biobuf *bin, *bout;
 	Type *t;
 	Field *f;
@@ -371,6 +372,10 @@ main(int argc, char **argv)
 				name = f->name;
 				if(cutprefix(name))
 					name += prefix;
+				if(strcmp(name, "") == 0) {
+					snprint(nambuf, sizeof nambuf, "Pad%d", npad++);
+					name = nambuf;
+				}
 				Bprint(bout, "\t%lT;\n", name, f->type);
 				if(t->kind == Union && lang == &go)
 					break;
@@ -531,6 +536,10 @@ cutprefix(char *name)
 {
 	char *p;
 
+	// special case: orig_ in register struct
+	if(strncmp(name, "orig_", 5) == 0)
+		return 0;
+
 	for(p=name; *p; p++) {
 		if(*p == '_')
 			return p-name > 0;

src/pkg/syscall/Makefile

@@ -18,6 +18,5 @@ GOFILES=\
 
 OFILES=\
 	asm_$(GOOS)_$(GOARCH).$O\
-	types_$(GOOS)_$(GOARCH).$O\
 
 include $(GOROOT)/src/Make.pkg

src/pkg/syscall/PORT.sh

@@ -54,11 +54,6 @@
 # there is almost always a #define that can get the real ones.
 # See types_darwin.c and types_linux.c for examples.
 #
-# * types_${GOOS}_${GOARCH}.c
-#
-# Same as types_${GOOS}_${GOARCH}.go except that it contains
-# definitions specific to ${GOOS} one one particular architecture.
-#
 # * zerror_${GOOS}_${GOARCH}.go
 #
 # This machine-generated file defines the system's error numbers,
@@ -117,9 +112,4 @@ esac
 echo "$mkerrors >zerrors_$GOOSARCH.go"
 echo "$mksyscall syscall_$GOOS.go syscall_$GOOSARCH.go >zsyscall_$GOOSARCH.go"
 echo "$mksysnum >zsysnum_$GOOSARCH.go"
-echo "$mktypes types_$GOOS.c types_$GOOSARCH.c >ztypes_$GOOSARCH.go"
-
-port=$(ls *.go | grep -v _)
-arch=$(ls *_$GOOSARCH.s *_$GOOSARCH.go *_$GOOS.go)
-all=$(ls $port $arch)	# sort them
-echo gobuild $all
+echo "$mktypes types_$GOOS.c >ztypes_$GOOSARCH.go"

src/pkg/syscall/mkerrors.sh

@@ -43,7 +43,7 @@ godefs -gsyscall "$@" _errors.c
 
 # Run C program to print error strings.
 (
-	echo "
+	/bin/echo "
 #include <stdio.h>
 #include <errno.h>
 #include <ctype.h>
@@ -57,10 +57,12 @@ int errors[] = {
 "
 	for i in $errors
 	do
-		echo '	'$i,
+		/bin/echo '	'$i,
 	done
 
-	echo '
+	# Use /bin/echo to avoid builtin echo,
+	# which interprets \n itself
+	/bin/echo '
 };
 
 int
@@ -89,5 +91,4 @@ main(void)
 '
 ) >_errors.c
 
-gcc -o _errors _errors.c && ./_errors
-rm -f _errors.c _errors
+gcc -o _errors _errors.c && ./_errors && rm -f _errors.c _errors

src/pkg/syscall/mksyscall.sh

@@ -171,10 +171,7 @@ print <<EOF;
 
 package syscall
 
-import (
-	"syscall";
-	"unsafe";
-)
+import "unsafe"
 
 $text
 

src/pkg/syscall/types_darwin.c

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 /*
-Input to godefs.  See PORT.
+Input to godefs.  See PORT.sh
  */
 
 #define __DARWIN_UNIX03 0

src/pkg/syscall/types_darwin_386.c

-// Nothing to see here.

src/pkg/syscall/types_darwin_amd64.c

-// Nothing to see here.

src/pkg/syscall/types_linux.c

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 /*
-Input to godefs.  See PORT.
+Input to godefs.  See PORT.sh
  */
 
 #define _LARGEFILE_SOURCE

src/pkg/syscall/types_linux_386.c

-// Nothing to see here

src/pkg/syscall/types_linux_amd64.c

-// Nothing to see here

src/pkg/syscall/ztypes_darwin_386.go

-// godefs -gsyscall -f-m32 types_darwin.c types_darwin_386.c
+// godefs -gsyscall -f-m32 types_darwin.c
 
 // MACHINE GENERATED - DO NOT EDIT.
 

src/pkg/syscall/ztypes_darwin_amd64.go

-// godefs -gsyscall -f-m64 types_darwin.c types_darwin_amd64.c
+// godefs -gsyscall -f-m64 types_darwin.c
 
 // MACHINE GENERATED - DO NOT EDIT.
 

src/pkg/syscall/ztypes_linux_386.go

-// godefs -gsyscall -f-m32 types_linux.c types_linux_386.c
+// godefs -gsyscall -f-m32 types_linux.c
 
 // MACHINE GENERATED - DO NOT EDIT.
 
@@ -163,18 +163,18 @@ type Timex struct {
 	Calcnt int32;
 	Errcnt int32;
 	Stbcnt int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
+	Pad0 int32;
+	Pad1 int32;
+	Pad2 int32;
+	Pad3 int32;
+	Pad4 int32;
+	Pad5 int32;
+	Pad6 int32;
+	Pad7 int32;
+	Pad8 int32;
+	Pad9 int32;
+	Pad10 int32;
+	Pad11 int32;
 }
 
 type Time_t int32
@@ -314,7 +314,7 @@ type PtraceRegs struct {
 	__fs uint16;
 	Gs uint16;
 	__gs uint16;
-	Eax int32;
+	Orig_eax int32;
 	Eip int32;
 	Cs uint16;
 	__cs uint16;

src/pkg/syscall/ztypes_linux_amd64.go

-// godefs -gsyscall -f-m64 types_linux.c types_linux_amd64.c
+// godefs -gsyscall -f-m64 types_linux.c
 
 // MACHINE GENERATED - DO NOT EDIT.
 
@@ -166,18 +166,18 @@ type Timex struct {
 	Calcnt int64;
 	Errcnt int64;
 	Stbcnt int64;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
-	 int32;
+	Pad3 int32;
+	Pad4 int32;
+	Pad5 int32;
+	Pad6 int32;
+	Pad7 int32;
+	Pad8 int32;
+	Pad9 int32;
+	Pad10 int32;
+	Pad11 int32;
+	Pad12 int32;
+	Pad13 int32;
+	Pad14 int32;
 }
 
 type Time_t int64