--- qemu/linux-user/ppc/syscall.h	2018/04/24 16:48:08	1.1.1.2
+++ qemu/linux-user/ppc/syscall.h	2018/04/24 17:22:56	1.1.1.4
@@ -14,8 +14,7 @@
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
 /* XXX: ABSOLUTELY BUGGY:
@@ -51,6 +50,9 @@ struct target_revectored_struct {
 	abi_ulong __map[8];			/* 256 bits */
 };
 
+/* Nasty hack: define a fake errno value for use by sigreturn.  */
+#define TARGET_QEMU_ESIGRETURN 255
+
 /*
  * flags masks
  */