backtrace: Avoid GCC warning on x86-64.

[sliver-openvswitch.git] / lib / backtrace.c

diff --git a/lib/backtrace.c b/lib/backtrace.c
index 0706039..2f47809 100644 (file)
--- a/lib/backtrace.c
+++ b/lib/backtrace.c
@@ -1,17 +1,17 @@
 /*
  * Copyright (c) 2008, 2009 Nicira Networks.
  *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * 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:
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *     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 <config.h>
@@ -42,7 +42,7 @@ get_max_stack(void)
     for (line_number = 1; fgets(line, sizeof line, f); line_number++) {
         if (strstr(line, "[stack]")) {
             uintptr_t end;
-            if (sscanf(line, "%*"SCNxPTR"-%"SCNxPTR, &end) != 1) {
+            if (sscanf(line, "%*x-%"SCNxPTR, &end) != 1) {
                 VLOG_WARN("%s:%d: parse error", file_name, line_number);
                 continue;
             }
@@ -73,6 +73,10 @@ stack_low(void)
     uintptr_t low;
     asm("movl %%esp,%0" : "=g" (low));
     return low;
+#elif __x86_64__
+    uintptr_t low;
+    asm("movq %%rsp,%0" : "=g" (low));
+    return low;
 #else
     /* This causes a warning in GCC that cannot be disabled, so use it only on
      * non-x86. */