1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * you may not use this file except in compliance with the License. 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * You may obtain a copy of the License at 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Target-specific optimization and run-time hints 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include "Dalvik.h" 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include "libdex/DexClass.h" 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include <stdlib.h> 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include <stddef.h> 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include <sys/stat.h> 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The class loader will associate with each method a 32-bit info word 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (jniArgInfo) to support JNI calls. The high order 4 bits of this word 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * are the same for all targets, while the lower 28 are used for hints to 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * allow accelerated JNI bridge transfers. 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * jniArgInfo (32-bit int) layout: 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * SRRRHHHH HHHHHHHH HHHHHHHH HHHHHHHH 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * S - if set, ignore the hints and do things the hard way (scan signature) 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * R - return-type enumeration 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * H - target-specific hints (see below for details) 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * This function produces x86-specific hints for the standard 32-bit 386 ABI. 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Note that the JNI requirements are very close to the 386 runtime model. In 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * particular, natural datatype alignments do not apply to passed arguments. 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * All arguments have 32-bit alignment. As a result, we don't have to worry 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * about padding - just total size. The only tricky bit is that floating point 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * return values come back on the FP stack. 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 386 ABI JNI hint format 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * ZZZZ ZZZZZZZZ AAAAAAAA AAAAAAAA 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Z - reserved, must be 0 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * A - size of variable argument block in 32-bit words (note - does not 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * include JNIEnv or clazz) 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * For the 386 ABI, valid hints should always be generated. 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectu4 dvmPlatformInvokeHints( const DexProto* proto) 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const char* sig = dexProtoGetShorty(proto); 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project unsigned int jniHints, wordCount; 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char sigByte; 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project wordCount = 0; 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (true) { 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project sigByte = *(sig++); 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (sigByte == '\0') 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project wordCount++; 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (sigByte == 'D' || sigByte == 'J') { 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project wordCount++; 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (wordCount > 0xFFFF) { 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* Invalid - Dex file limitation */ 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project jniHints = DALVIK_JNI_NO_ARG_INFO; 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project jniHints = wordCount; 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return jniHints; 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 90