Added missing files

include/b6b/syscall.h

@@ -0,0 +1,22 @@
+/*
+ * This file is part of b6b.
+ *
+ * Copyright 2017 Dima Krasner
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+int b6b_syscall(struct b6b_interp *interp,
+                int *ret,
+                const long nr,
+                ...);

src/b6b_syscall.c

@@ -0,0 +1,71 @@
+/*
+ * This file is part of b6b.
+ *
+ * Copyright 2017 Dima Krasner
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+#include <stdarg.h>
+#ifdef B6B_HAVE_VALGRIND
+#	include <valgrind/helgrind.h>
+#endif
+
+#include <b6b.h>
+
+static void b6b_do_syscall(void *arg)
+{
+	struct b6b_syscall_data *data = (struct b6b_syscall_data *)arg;
+
+	data->rval = syscall(data->args[0],
+	                     data->args[1],
+	                     data->args[2],
+	                     data->args[3],
+	                     data->args[4],
+	                     data->args[5]);
+	if (data->rval < 0)
+		data->rerrno = errno;
+}
+
+int b6b_syscall(struct b6b_interp *interp,
+                int *ret,
+                const long nr,
+                ...)
+{
+	struct b6b_syscall_data data;
+	va_list ap;
+	int i;
+
+	va_start(ap, nr);
+
+	data.args[0] = nr;
+	for (i = 1; i < sizeof(data.args) / sizeof(data.args[0]); ++i)
+		data.args[i] = va_arg(ap, long);
+
+	va_end(ap);
+
+#ifdef B6B_HAVE_VALGRIND
+	VALGRIND_HG_DISABLE_CHECKING(&data, sizeof(data));
+#endif
+	if (!b6b_offload(interp, b6b_do_syscall, &data))
+		return 0;
+
+	*ret = data.rval;
+	if (data.rval < 0)
+		errno = data.rerrno;
+
+	return 1;
+}