Apply patches from jdpotter@google.com, as submitted to NetWatch Maintainer Team...

[netwatch.git] / lib / cpuid.S

diff --git a/lib/cpuid.S b/lib/cpuid.S
new file mode 100644 (file)
index 0000000..6216a56
--- /dev/null
+++ b/lib/cpuid.S
@@ -0,0 +1,56 @@
+/* cpuid.S
+ * CPUID wrapper
+ * NetWatch system management mode administration console
+ *
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.global cpuid
+cpuid:
+       // Save registers
+       push %ebx
+       push %edi
+
+       // Load arguments from stack
+       mov 12(%esp), %eax
+       mov 16(%esp), %edi
+
+       cpuid
+
+       // Save results into output pointer
+       mov %eax, (%edi)
+       mov %ebx, 4(%edi)
+       mov %ecx, 8(%edi)
+       mov %edx, 12(%edi)
+
+       // All done!
+       pop %edi
+       pop %ebx
+       ret