1 /* Copyright (C) 2008 The Android Open Source Project 2 * 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 /* 17 * File: OP_INVOKE_VIRTUAL.S 18 * 19 * Code: Call a virtual method. Provides an "isrange" variable and 20 * a "routine" variable to specify this is the "range" version of 21 * invoke_direct that allows up to 255 arguments. 22 * 23 * For: invoke-virtual, invoke-virtual/range 24 * 25 * Description: invoke-virtual is used to invoke a normal virtual method; 26 * a method that is not static or final, and is not a constructor. 27 * 28 * Format: B|A|op CCCC G|F|E|D (35c) 29 * AA|op BBBB CCCC (3rc) 30 * 31 * Syntax: [B=5] op {vD, vE, vF, vG, vA}, meth@CCCC (35c) 32 * [B=5] op {vD, vE, vF, vG, vA}, type@CCCC (35c) 33 * [B=4] op {vD, vE, vF, vG}, kind@CCCC (35c) 34 * [B=3] op {vD, vE, vF}, kind@CCCC (35c) 35 * [B=2] op {vD, vE}, kind@CCCC (35c) 36 * [B=1] op {vD}, kind@CCCC (35c) 37 * [B=0] op {}, kind@CCCC (35c) 38 * 39 * op {vCCCC .. vNNNN}, meth@BBBB (3rc) (where NNNN = CCCC+AA-1, that 40 * op {vCCCC .. vNNNN}, type@BBBB (3rc) is A determines the count 0..255, 41 * and C determines the first register) 42 */ 43 44 %default { "isrange":"0", "routine":"NoRange" } 45 46 movl rGLUE, %eax # %eax<- pMterpGlue 47 EXPORT_PC # must export pc for invoke 48 movl offGlue_methodClassDex(%eax), %eax # %eax<- pDvmDex 49 FETCH 1, %ecx # %ecx<- method index 50 movl offDvmDex_pResMethods(%eax), %eax # %eax<- pDvmDex->pResMethods 51 FETCH 2, %edx # %edx<- GFED or CCCC 52 .if (!$isrange) 53 and $$15, %edx # %edx<- D if not range 54 .endif 55 cmp $$0, (%eax, %ecx, 4) # check if already resolved 56 je .L${opcode}_break 57 movl (%eax, %ecx, 4), %eax # %eax<- resolved base method 58 jmp .L${opcode}_continue 59 %break 60 61 .L${opcode}_break: 62 movl rGLUE, %eax # %eax<- pMterpGlue 63 movl %edx, -4(%esp) # save "this" pointer register 64 movl offGlue_method(%eax), %eax # %eax<- glue->method 65 movl $$METHOD_VIRTUAL, -8(%esp) # push parameter method type 66 movl %ecx, -12(%esp) # push paramter method index 67 movl offMethod_clazz(%eax), %eax # %eax<- glue->method->clazz 68 lea -16(%esp), %esp 69 movl %eax, (%esp) # push parameter clazz 70 call dvmResolveMethod # call: (const ClassObject* referrer, 71 # u4 methodIdx, MethodType methodType) 72 # return: Method* 73 lea 16(%esp), %esp 74 cmp $$0, %eax # check for null method return 75 movl -4(%esp), %edx # get "this" pointer register 76 jne .L${opcode}_continue 77 jmp common_exceptionThrown # null pointer; handle exception 78 79 /* 80 * At this point: 81 * %eax = resolved base method 82 * %edx = D or CCCC (index of first arg, which is the "this" ptr) 83 */ 84 85 .L${opcode}_continue: 86 GET_VREG %edx # %edx<- "this" ptr 87 movzwl offMethod_methodIndex(%eax), %eax # %eax<- baseMethod->methodIndex 88 cmp $$0, %edx # %edx<- check for null "this" 89 je common_errNullObject # handle null object 90 movl offObject_clazz(%edx), %edx # %edx<- thisPtr->clazz 91 movl offClassObject_vtable(%edx), %edx # %edx<- thisPtr->clazz->vtable 92 movl (%edx, %eax, 4), %ecx # %ecx<- vtable[methodIndex] 93 jmp common_invokeMethod${routine} # invoke method common code 94
