1 files changed, 79 insertions, 0 deletions
diff --git a/vm/arch/x86-atom/Hints386ABI.c b/vm/arch/x86-atom/Hints386ABI.c
new file mode 100644
index 0000000..dd2fc69
--- /dev/null
+++ b/vm/arch/x86-atom/Hints386ABI.c
@@ -0,0 +1,79 @@
+   /* Copyright (C) 2008 The Android Open Source Project
+    *
+    * 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.
+    */
+
+   /*
+    * The class loader will associate with each method a 32-bit info word
+    * (jniArgInfo) to support JNI calls.  The high order 4 bits of this word
+    * are the same for all targets, while the lower 28 are used for hints to
+    * allow accelerated JNI bridge transfers.
+    *
+    * jniArgInfo (32-bit int) layout:
+    *
+    *    SRRRHHHH HHHHHHHH HHHHHHHH HHHHHHHH
+    *
+    *    S - if set, ignore the hints and do things the hard way (scan signature)
+    *    R - return-type enumeration
+    *    H - target-specific hints (see below for details)
+    *
+    * This function produces IA32-specific hints for the standard 32-bit 386 ABI.
+    * All arguments have 32-bit alignment.  Padding is not an issue.
+    *
+    * IA32 ABI JNI hint format
+    *
+    *       ZZZZ ZZZZZZZZ AAAAAAAA AAAAAAAA
+    *
+    *   Z - reserved, must be 0
+    *   A - size of variable argument block in 32-bit words (note - does not
+    *       include JNIEnv or clazz)
+    *
+    * For the 386 ABI, valid hints should always be generated.
+    */
+
+
+#include "Dalvik.h"
+#include "libdex/DexClass.h"
+#include <stdlib.h>
+#include <stddef.h>
+#include <sys/stat.h>
+
+u4 dvmPlatformInvokeHints(const DexProto* proto)  {
+
+const char* sig = dexProtoGetShorty(proto);
+unsigned int wordCount = 0;
+char sigByte;
+
+ while (1) {
+
+   /*
+    * Move past return type; dereference sigByte
+    */
+
+    sigByte = *(++sig);
+    if (sigByte == '\0') { break; }
+    ++wordCount;
+
+    if (sigByte == 'D' || sigByte == 'J') {
+      ++wordCount;
+    }
+ }
+
+/*
+ * Check for Dex file limitation and return
+ */
+
+ if (wordCount > 0xFFFF) { return DALVIK_JNI_NO_ARG_INFO; }
+ return wordCount;
+
+}