arm: use the correct stat syscalls

We were using the 64-bit struct with the old 32-bit
system calls.

http://code.google.com/p/go/issues/detail?id=1083

This also fixes up mksyscall.sh to generate
gofmt-compliant code.

R=rsc
CC=golang-dev, kaib
https://golang.org/cl/2148042

src/pkg/syscall/mksyscall.sh

@@ -73,7 +73,8 @@ while(<>) {
 	my @out = parseparamlist($out);
 
 	# Go function header.
-	$text .= sprintf "func %s(%s) (%s) {\n", $func, join(', ', @in), join(', ', @out);
+	my $out_decl = @out ? sprintf(" (%s)", join(', ', @out)) : "";
+	$text .= sprintf "func %s(%s)%s {\n", $func, join(', ', @in), $out_decl;
 
 	# Prepare arguments to Syscall.
 	my @args = ();
@@ -88,15 +89,15 @@ while(<>) {
 			# Convert slice into pointer, length.
 			# Have to be careful not to take address of &a[0] if len == 0:
 			# pass nil in that case.
-			$text .= "\tvar _p$n *$1;\n";
-			$text .= "\tif len($name) > 0 { _p$n = \&${name}[0]; }\n";
+			$text .= "\tvar _p$n *$1\n";
+			$text .= "\tif len($name) > 0 {\n\t\t_p$n = \&${name}[0]\n\t}\n";
 			push @args, "uintptr(unsafe.Pointer(_p$n))", "uintptr(len($name))";
 			$n++;
 		} elsif($type eq "int64" && $_32bit ne "") {
 			if($_32bit eq "big-endian") {
-				push @args, "uintptr($name >> 32)", "uintptr($name)";
+				push @args, "uintptr($name>>32)", "uintptr($name)";
 			} else {
-				push @args, "uintptr($name)", "uintptr($name >> 32)";
+				push @args, "uintptr($name)", "uintptr($name>>32)";
 			}
 		} else {
 			push @args, "uintptr($name)";
@@ -159,19 +160,22 @@ while(<>) {
 			$ret[$i] = sprintf("r%d", $i);
 			$ret[$i+1] = sprintf("r%d", $i+1);
 		}
-		$body .= "\t$name = $type($reg);\n";
+		$body .= "\t$name = $type($reg)\n";
 	}
 	if ($ret[0] eq "_" && $ret[1] eq "_" && $ret[2] eq "_") {
-		$text .= "\t$call;\n";
+		$text .= "\t$call\n";
 	} else {
-		$text .= "\t$ret[0], $ret[1], $ret[2] := $call;\n";
+		$text .= "\t$ret[0], $ret[1], $ret[2] := $call\n";
 	}
 	$text .= $body;
 
-	$text .= "\treturn;\n";
+	$text .= "\treturn\n";
 	$text .= "}\n\n";
 }
 
+chomp $text;
+chomp $text;
+
 if($errors) {
 	exit 1;
 }
@@ -185,6 +189,5 @@ package syscall
 import "unsafe"
 
 $text
-
 EOF
 exit 0;

src/pkg/syscall/syscall_linux_arm.go

@@ -36,15 +36,15 @@ func NsecToTimeval(nsec int64) (tv Timeval) {
 
 //sys	Chown(path string, uid int, gid int) (errno int)
 //sys	Fchown(fd int, uid int, gid int) (errno int)
-//sys	Fstat(fd int, stat *Stat_t) (errno int)
-//sys	Fstatfs(fd int, buf *Statfs_t) (errno int)
+//sys	Fstat(fd int, stat *Stat_t) (errno int) = SYS_FSTAT64
+//sys	Fstatfs(fd int, buf *Statfs_t) (errno int) = SYS_FSTATFS64
 //sys	Getegid() (egid int)
 //sys	Geteuid() (euid int)
 //sys	Getgid() (gid int)
 //sys	Getuid() (uid int)
 //sys	Lchown(path string, uid int, gid int) (errno int)
 //sys	Listen(s int, n int) (errno int)
-//sys	Lstat(path string, stat *Stat_t) (errno int)
+//sys	Lstat(path string, stat *Stat_t) (errno int) = SYS_LSTAT64
 //sys	Seek(fd int, offset int64, whence int) (off int64, errno int) = SYS_LSEEK
 //sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, errno int) = SYS__NEWSELECT
 //sys	Setfsgid(gid int) (errno int)
@@ -55,8 +55,8 @@ func NsecToTimeval(nsec int64) (tv Timeval) {
 //sys	Setresuid(ruid int, euid int, suid int) (errno int)
 //sys	Setreuid(ruid int, euid int) (errno int)
 //sys	Shutdown(fd int, how int) (errno int)
-//sys	Stat(path string, stat *Stat_t) (errno int)
-//sys	Statfs(path string, buf *Statfs_t) (errno int)
+//sys	Stat(path string, stat *Stat_t) (errno int) = SYS_STAT64
+//sys	Statfs(path string, buf *Statfs_t) (errno int) = SYS_STATFS64
 
 // TODO(kaib): add support for tracing
 func (r *PtraceRegs) PC() uint64 { return 0 }

src/pkg/syscall/zsyscall_linux_arm.go

@@ -680,13 +680,13 @@ func Fchown(fd int, uid int, gid int) (errno int) {
 }
 
 func Fstat(fd int, stat *Stat_t) (errno int) {
-	_, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := Syscall(SYS_FSTAT64, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	errno = int(e1)
 	return
 }
 
 func Fstatfs(fd int, buf *Statfs_t) (errno int) {
-	_, _, e1 := Syscall(SYS_FSTATFS, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0)
+	_, _, e1 := Syscall(SYS_FSTATFS64, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0)
 	errno = int(e1)
 	return
 }
@@ -728,7 +728,7 @@ func Listen(s int, n int) (errno int) {
 }
 
 func Lstat(path string, stat *Stat_t) (errno int) {
-	_, _, e1 := Syscall(SYS_LSTAT, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := Syscall(SYS_LSTAT64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
 	errno = int(e1)
 	return
 }
@@ -796,13 +796,13 @@ func Shutdown(fd int, how int) (errno int) {
 }
 
 func Stat(path string, stat *Stat_t) (errno int) {
-	_, _, e1 := Syscall(SYS_STAT, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
+	_, _, e1 := Syscall(SYS_STAT64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
 	errno = int(e1)
 	return
 }
 
 func Statfs(path string, buf *Statfs_t) (errno int) {
-	_, _, e1 := Syscall(SYS_STATFS, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(buf)), 0)
+	_, _, e1 := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(buf)), 0)
 	errno = int(e1)
 	return
 }