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_CONST_CLASS.S
18    *
19    * Code: Move a class reference to a register. Uses no substitutions.
20    *
21    * For: const/class
22    *
23    * Description: Move a reference to the class specified
24    *              by the given index into the specified register.
25    *              In the case where the indicated type is primitive,
26    *              this will store a reference to the primitive type's
27    *              degenerate class.
28    *
29    * Format: AA|op BBBBlo BBBBhi (21c)
30    *
31    * Syntax: op vAA, field@BBBB
32    */
33
34    movl        rGLUE, %edx             # get MterpGlue pointer
35    FETCH       1, %ecx                 # %ecx<- BBBB
36    movl        offGlue_methodClassDex(%edx), %eax # %eax<- pDvmDex
37    movl        offDvmDex_pResClasses(%eax), %eax # %eax<- pDvmDex->pResClasses
38    movl        (%eax, %ecx, 4), %eax   # %eax<- resolved class
39    cmp         $$0, %eax               # check if classes is resolved before?
40    je          .L${opcode}_resolve     # resolve class
41    SET_VREG    %eax, rINST             # vAA<- resolved class
42    FINISH      2                       # jump to next instruction
43%break
44
45   /*
46    * Continuation if the Class has not yet been resolved.
47    *  %ecx: BBBB (Class ref)
48    *  need: target register
49    */
50
51.L${opcode}_resolve:
52    EXPORT_PC
53    movl        offGlue_method(%edx), %edx # %edx<- glue->method
54    movl        offMethod_clazz(%edx), %edx # %edx<- glue->method->clazz
55    movl        $$1, -4(%esp)           # push parameter true
56    movl        %ecx, -8(%esp)          # push parameter
57    movl        %edx, -12(%esp)         # push parameter glue->method->clazz
58    lea         -12(%esp), %esp
59    call        dvmResolveClass         # resolve ClassObject pointer
60                                        # class: (const ClassObject* referrer, u4 classIdx,
61                                        #         bool fromUnverifiedConstant)
62                                        # return: ClassObject*
63    lea         12(%esp), %esp
64    cmp         $$0, %eax               # check for null pointer
65    je          common_exceptionThrown  # handle exception
66    SET_VREG    %eax, rINST             # vAA<- resolved class
67    FINISH      2                       # jump to next instruction
68